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25 November 2024, Volume 44 Issue 6

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Bearing capacity of large diameter hard rock socketed pile with mechanized hole in mountainous areas

WANG Jingde, ZHANG Xinchun, LIU Zengwei, SUN Qingsong, LI Bei

2024, 44(6):  561-570.  DOI: 10.3969/j.issn.1000-1565.2024.06.001

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To reveal the bearing characteristics and loading transfer mechanisms of hard rock-socketed piles, the factors influencing the bearing performance of large-diameter rock-anchored piles in mountainous areas are investigated in this paper. Combined with the mechanized borehole project for a 500 kV transmission line in the western of Baoding, geological parameters of the rocks were obtained through quasi-static compression tests. Explicit nonlinear finite element(FE)methods were employed to conduct numerical simulations on the uplift and shear load-bearing properties, failure modes, and carrying mechanisms of large-diameter rock-socketed piles in hard rock area. The mechanical behavior of pile bodies- DOI:10.3969/j.issn.1000-1565.2024.06.001山区机械化成孔的大孔径硬岩嵌岩桩承载能力王敬德^1,2,张新春¹,刘增炜³,孙青松³,李北²(1.华北电力大学 能源动力与机械工程学院,河北 保定 071003;2.河北电力工程监理有限公司,河北 石家庄 050081;3.国网河北省电力有限公司 建设公司,河北 石家庄 050081)摘 要:为揭示硬质岩石的承载能力与荷载传递机制,结合保定西某500 kV输电线路的山区机械化成孔项目,对山区大孔径嵌岩桩承载性能的影响因素进行了研究.首先利用准静态压缩试验得到岩石地质参数.然后,采用显式非线性有限元方法对山区大孔径硬岩嵌岩桩的抗拔与抗剪承载特性、失效模式和受力机理进行数值研究,具体分析桩体在上拔和水平荷载作用下的力学性能,讨论了覆土层增加钢套筒对桩体水平极限承载力的影响.研究结果表明:在上拔荷载下,承载力主要由桩体侧摩阻力和桩体自重来承担,硬质岩层桩侧摩阻力占主导地位,约为总侧摩阻力的90%;在水平荷载下,桩身较大位移区域在桩身4 m内,弯矩最大值出现在距桩顶2~3倍桩径,覆土层增加钢套筒可明显提高桩体的水平承载极限.本文研究结果将对岩石地质山区大孔径嵌岩桩结构设计和机械化施工提供理论指导.关键词:嵌岩桩;硬质岩石地质;抗拔承载力;水平位移;有限元分析中图分类号:TU741 文献标志码:A 文章编号:1000-1565(2024)06-0561-10Bearing capacity of large diameter hard rock socketed pile with mechanized hole in mountainous areasWANG Jingde^1,2, ZHANG Xinchun¹, LIU Zengwei³, SUN Qingsong³, LI Bei²(1. School of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China; 2. Hebei Electric Power Engineering Supervision Co., Ltd., Shijiazhuang 050081, China; 3. Construction Company, State Grid Hebei Electric Power Co., Ltd., Shijiazhuang 050081, China)Abstract: To reveal the bearing characteristics and loading transfer mechanisms of hard rock-socketed piles, the factors influencing the bearing performance of large-diameter rock-anchored piles in mountainous areas are investigated in this paper. Combined with the mechanized borehole project for a 500 kV transmission line in the western of Baoding, geological parameters of the rocks were obtained through quasi-static compression tests. Explicit nonlinear finite element(FE)methods were employed to conduct numerical simulations on the uplift and shear load-bearing properties, failure modes, and carrying mechanisms of large-diameter rock-socketed piles in hard rock area. The mechanical behavior of pile bodies- 收稿日期:2024-04-23;修回日期:2024-09-05 基金项目:国家自然科学基金资助项目(11875014);河北省电力工程监理有限公司资助项目(SGTYHT/21-JS-223) 第一作者:王敬德(1990—),男,华北电力大学在读博士研究生,河北电力工程监理有限公司高级工程师,主要从事输电线路工程研究.E-mail:rqhdejd@163.com 通信作者:张新春(1980—),男,华北电力大学副教授,博士,主要从事输电线路工程研究.E-mail:xczhang@ncepu.edu.cn 第6期王敬德等:山区机械化成孔的大孔径硬岩嵌岩桩承载能力河北大学学报(自然科学版) 第44卷under uplift and horizontal loadings was discussed in detail. The effects of adding steel casings to the overburden layer on the horizontal ultimate bearing capacity of the piles were also studied. The results show that the bearing capacity mainly depends upon the side frictional resistance and the self-weight of the pile under uplift loadings. The side frictional resistance of the pile plays a dominant role in the hard rock formation, which is about 90% of the total side frictional resistance. Under horizontal load, the maximum displacement area of pile body is within 4 m, and the maximum bending moment will appear within 2—3 times diameter of the pile from pile top. The horizontal ultimate bearing capacity of the pile can be significantly improved by adding steel casing to the overlying soil layer. These results will provide theoretical guidance for the structural design and mechanized construction of large-diameter rock-socketed piles in rocky mountainous area.

Influencing factors for bearing characteristics of screw pile under vertical load

DENG Yousheng,ZHUANG Ziying,DONG Chenhui,CHEN Zhuo,WU Along

2024, 44(6):  571-580.  DOI: 10.3969/j.issn.1000-1565.2024.06.002

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In order to study the effect of pile thread structure parameters on the bearing characteristics of screw piles under vertical load. Laboratory model test and finite element analysis were carried out to compare and analyze the load settlement curve and axial force distribution curve under different thread length, thread spacing, thread inner diameter, thread width and thickness. The results show that with the increase of the length of thread section, the ultimate bearing capacity of screw pile increases, and the sudden change of axial strain at the variable section increases. It is recommended to take the length of pile 1/2—2/3. The bearing capacity of screw pile increases first and then decreases with the increase of thread spacing. There is a suitable pitch which can maximize the interaction between pile and soil. Changing the diameter reduction ratio of screw pile will affect the end-bearing action of soil at the variable section and the end of pile and will easily cause stress concentration in the section of thread section. The recommended value is between 0.7—0.8. The change of thread width and thickness will change the constraint degree of thread and soil, and then affect its ultimate bearing capacity. The influence of thread width on ultimate bearing- DOI:10.3969/j.issn.1000-1565.2024.06.002竖向荷载下螺钉桩承载特性的影响因素邓友生^1,2,庄子颖^1,2,董晨辉^1,2,陈茁^1,2,吴阿龙^1,2(1.西安科技大学 建筑与土木工程学院,陕西 西安 710054;2.西安科技大学 桩承结构研究中心,陕西 西安 710054)摘 要:为了研究桩身螺纹结构参数对竖向荷载下螺钉桩承载特性的影响,开展室内模型试验与有限元分析,对比分析不同螺纹段长度、螺纹间距、螺纹内径、螺纹宽度与螺牙深度下的荷载沉降曲线与轴力分布曲线.结果表明:随着螺纹段长度的增加,螺钉桩极限承载力提升,变截面处轴向应力突变程度增加,建议长度取桩长的1/2~2/3;螺钉桩承载能力随螺纹间距增加呈先增后减的趋势,存在一个合适螺距可以最大程度发挥桩土间相互作用;改变螺钉桩变径比,将影响变截面处与桩端处土体端承作用,同时易引起螺纹段截面应力集中,建议取值0.7~0.8;螺纹宽度与螺牙深度的变化改变螺纹与土体的约束程度,进而影响其极限承载能力.螺纹宽度的变化对极限承载力的影响要大于螺牙深度变化的影响.关键词:桩基础;螺钉桩;竖向承载特性;模型实验;有限元中图分类号:TU473 文献标志码:A 文章编号:1000-1565(2024)06-0571-10Influencing factors for bearing characteristics of screw pile under vertical load DENG Yousheng^1,2,ZHUANG Ziying^1,2,DONG Chenhui^1,2,CHEN Zhuo^1,2,WU Along^1,2(1. School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an 710054, China;2. Pile-supported Structures Research & Test Center, Xi’an University of Science and Technology, Xi’an 710054, China)Abstract: In order to study the effect of pile thread structure parameters on the bearing characteristics of screw piles under vertical load. Laboratory model test and finite element analysis were carried out to compare and analyze the load settlement curve and axial force distribution curve under different thread length, thread spacing, thread inner diameter, thread width and thickness. The results show that with the increase of the length of thread section, the ultimate bearing capacity of screw pile increases, and the sudden change of axial strain at the variable section increases. It is recommended to take the length of pile 1/2—2/3. The bearing capacity of screw pile increases first and then decreases with the increase of thread spacing. There is a suitable pitch which can maximize the interaction between pile and soil. Changing the diameter reduction ratio of screw pile will affect the end-bearing action of soil at the variable section and the end of pile and will easily cause stress concentration in the section of thread section. The recommended value is between 0.7—0.8. The change of thread width and thickness will change the constraint degree of thread and soil, and then affect its ultimate bearing capacity. The influence of thread width on ultimate bearing- 收稿日期:2024-07-07;修回日期:2024-08-24 基金项目:国家自然科学基金资助项目(51878554);陕西省自然科学基础研究计划重点项目(2018JZ5012) 第一作者:邓友生(1969—),男,西安科技大学教授,博士生导师,博士,主要从事基础工程与防灾减灾结构研究.E-mail:dengys2009@126.com 第6期邓友生等:竖向荷载下螺钉桩承载特性的影响因素河北大学学报(自然科学版) 第44卷capacity is greater than that of thread thickness.

Damage evolution characteristics of fractured rock under freeze-thaw cycles

LYU Yuanqiang, YE Wanjun, ZHAO Jingang, JIANG Haibo, JIANG Beiru, ZHANG Xueli

2024, 44(6):  581-592.  DOI: 10.3969/j.issn.1000-1565.2024.06.003

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In order to analyze the influence of freeze-thaw cycle on the characteristics of rock fissure development in detail, CT scanning technology was used to obtain three-dimensional structural images of intact sandstone and fissured sandstone samples, and quantitatively describe the model parameters of the pore network, aiming to systematically analyze the dynamic evolution of the fissure morphology of the rock during the freeze-thaw cycle and the change rule of the pore structure along with the increase of the number of freeze-thaw cycles. The results show that during the freeze-thaw cycle, the fine structural parameters of sandstone samples show positive correlation with the number of freeze-thaw cycles; intact sandstone is more resistant to freeze-thaw damage, and mainly forms a ring-shaped damage zone at the periphery of the rock; the fractal dimension of fractured sandstone is significantly higher than that of intact sandstone, and the change of pore size distribution is more significant, and due to the existence of preformed - DOI:10.3969/j.issn.1000-1565.2024.06.003冻融循环作用下裂隙岩石损伤扩展演化特征吕远强^1,2,叶万军³,赵金刚¹,姜海波¹,蒋蓓茹³,张雪丽³(1.中煤西安设计工程有限责任公司,陕西 西安 710000;2.长安大学 地质工程与测绘学院,陕西 西安 710054;3.西安科技大学 建筑与土木工程学院,陕西 西安 710054)摘 要:为深入剖析冻融循环对岩石裂隙发育特性的影响,运用CT扫描技术获取完整砂岩与裂隙砂岩样本的三维结构影像,对孔隙网络的模型参数实施量化描述,旨在系统分析岩石在经历冻融循环过程中的裂隙形态动态演变,以及伴随冻融循环次数增加的孔隙结构变化规律.结果表明:冻融循环过程中,砂岩样本细观结构参数表现出与冻融循环次数之间的正相关性;完整砂岩对冻融损伤的抵抗力较强,主要在岩石外围形成环状损伤区;裂隙砂岩的分形维数显著高于完整砂岩,孔径分布变化更为显著,由于存在预制裂隙,裂隙成为冻融损伤的集中区;孔隙总体积和面孔隙率的增加是冻融损伤的直接结果.研究结果对于揭示寒冷地区岩体损伤机制具有一定参考价值.关键词:CT扫描;裂隙砂岩;冻融循环;孔隙网络模型;孔隙率中图分类号:TU45 文献标志码:A 文章编号:1000-1565(2024)06-0581-12Damage evolution characteristics of fractured rock under freeze-thaw cyclesLYU Yuanqiang^1,2, YE Wanjun³, ZHAO Jingang¹, JIANG Haibo¹, JIANG Beiru³, ZHANG Xueli³(1. China Coal Xian Design Engineering Co., Ltd., Xian 710000, China; 2. College of Geological Engineering and Geomatics, Changan University, Xian 710054,China; 3. School of Architecture and Civil Engineering, Xian University of Science and Technology, Xian 710054, China)Abstract: In order to analyze the influence of freeze-thaw cycle on the characteristics of rock fissure development in detail, CT scanning technology was used to obtain three-dimensional structural images of intact sandstone and fissured sandstone samples, and quantitatively describe the model parameters of the pore network, aiming to systematically analyze the dynamic evolution of the fissure morphology of the rock during the freeze-thaw cycle and the change rule of the pore structure along with the increase of the number of freeze-thaw cycles. The results show that during the freeze-thaw cycle, the fine structural parameters of sandstone samples show positive correlation with the number of freeze-thaw cycles; intact sandstone is more resistant to freeze-thaw damage, and mainly forms a ring-shaped damage zone at the periphery of the rock; the fractal dimension of fractured sandstone is significantly higher than that of intact sandstone, and the change of pore size distribution is more significant, and due to the existence of preformed - 收稿日期:2024-08-10;修回日期:2024-08-24 基金项目:国家自然科学基金资助项目(42220104005) 第一作者:吕远强(1977—),男,中煤西安设计工程有限责任公司高级工程师,长安大学在读博士研究生,主要从事岩土工程和工程地质方面的研究.E-mail:4109914@qq.com 通信作者:叶万军(1976—),男,西安科技大学教授,博士生导师,博士,主要从事岩土工程、隧道工程等方面的研究.E-mail:63451400@qq.com 第6期吕远强等:冻融循环作用下裂隙岩石损伤扩展演化特征河北大学学报(自然科学版) 第44卷fissures, there is a concentrated zone of freeze-thaw damage; and the increase of the total volume of the pore and the face porosity is a direct cause of freeze-thaw damage. The results of this study have certain reference value for revealing the damage mechanism of rock bodies in cold regions.

Residual mechanical properties and damage evaluation of H-section steel columns subjected to impact along weak axis

YANG Bohui, WANG Rui, ZHAO Hui

2024, 44(6):  593-601.  DOI: 10.3969/j.issn.1000-1565.2024.06.004

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H-section steel columns employed in industrial buildings are vulnerable to the vehicle or crane-load collisions, and the impact direction is indeterminate. Therefore, this work mainly investigated the residual bearing capacity and evaluated the damage degree of H-section steel columns subjected to impact along weak axis. The failure modes, load displacement curves and strain development were obtained from the experiments. Then, the influence of impact mass, impact velocity and axial compression ratio was analyzed based on finite element models. Finally, a prediction formula of residual bearing capacity for H-section steel columns subjected to impact along weak axis was proposed. The results showed that the specimens presented global flexural deformation and there was no obvious local deformation at flange or web during compression. The stiffness and bearing capacity of the columns decreased obviously after impact, while the columns still presented good ductility behaviour. The impact energy and the pre-axial loading levels of the columns during impact are the main affecting factors of the residual bearing capacity. Based on the impact mass, impact velocity and axial compression ratio during impact,the m-v-n damage evaluation diagram was established, which can be used to evaluate the damage degree of- DOI:10.3969/j.issn.1000-1565.2024.06.004H型钢弱轴撞击后剩余力学性能与损伤评估杨博惠,王蕊,赵晖(太原理工大学 土木工程学院,山西 太原 030024)摘 要:工业厂房中的H型钢常遭受吊物与车辆撞击,且撞击方向具有不确定性.基于此,本文针对H型钢弱轴撞击后剩余力学性能与损伤评估进行研究.首先,通过试验获得了弱轴撞击后破坏形态、荷载位移曲线与应变发展特征.其次,基于有限元模型重点分析了撞击质量、撞击速度与轴压比对剩余承载力的影响,并提出了H型钢弱轴撞击后剩余承载力预测公式.研究结果表明:试件受压以整体弯曲变形为主,翼缘与腹板均未发生明显局部变形;撞击后试件刚度与承载力明显降低,但仍保持较好的延性;撞击能量与轴压比是影响剩余承载力的关键因素;基于撞击质量、撞击速度与受撞时轴压比建立了m-v-n损伤评估曲面图,可根据撞击工况评估H型钢弱轴受撞损伤程度.关键词:H型钢;弱轴;剩余承载力试验;有限元分析;损伤评估中图分类号:TU391 文献标志码:A 文章编号:1000-1565(2024)06-0593-09Residual mechanical properties and damage evaluation of H-section steel columns subjected to impact along weak axisYANG Bohui, WANG Rui, ZHAO Hui(College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China)Abstract: H-section steel columns employed in industrial buildings are vulnerable to the vehicle or crane-load collisions, and the impact direction is indeterminate. Therefore, this work mainly investigated the residual bearing capacity and evaluated the damage degree of H-section steel columns subjected to impact along weak axis. The failure modes, load displacement curves and strain development were obtained from the experiments. Then, the influence of impact mass, impact velocity and axial compression ratio was analyzed based on finite element models. Finally, a prediction formula of residual bearing capacity for H-section steel columns subjected to impact along weak axis was proposed. The results showed that the specimens presented global flexural deformation and there was no obvious local deformation at flange or web during compression. The stiffness and bearing capacity of the columns decreased obviously after impact, while the columns still presented good ductility behaviour. The impact energy and the pre-axial loading levels of the columns during impact are the main affecting factors of the residual bearing capacity. Based on the impact mass, impact velocity and axial compression ratio during impact,the m-v-n damage evaluation diagram was established, which can be used to evaluate the damage degree of- 收稿日期:2024-06-17;修回日期:2024-09-12 基金项目:国家自然科学基金资助项目(52108162);山西省重点国别科技合作项目(202204041101010) 第一作者:杨博惠(2000—),男,太原理工大学在读硕士研究生,主要从事桥梁结构抗冲击与防护研究. E-mail:JKBH188@163.com 通信作者:赵晖(1988—),男,太原理工大学副教授,博士,主要从事组合结构抗火与抗撞研究. E-mail:zhaohui01@tyut.edu.cn 第6期杨博惠等:H型钢弱轴撞击后剩余力学性能与损伤评估河北大学学报(自然科学版) 第44卷H-section steel columns under impact.

Electrocatalytic properties of two-dimensional M₂X₂( M: Mo、W and X: F、Cl )for hydrogen and oxygen evolution reactions

HOU Yina, WANG Bojing, WANG Ruining

2024, 44(6):  602-611.  DOI: 10.3969/j.issn.1000-1565.2024.06.005

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Starting from stripping the bulk metal of the hexagonal close-packed( HCP )crystal structure and forming a single-layer metal film, a stable ABAB-stacked metal halide compound was formed by passivating the intermediate metal layer with halogen atoms. The Mo-d projected density of states of adsorbed O atoms and non-adsorbed O atoms in *O are compared, and it is expected to reveal the relationship between electron arrangement, bonding state and catalytic performance of materials. Electronic structure calculations show that Mo₂X₂ and W₂X₂ have good electrical conductivity. By analogy with transition metal disulfides( MoS₂ ), defect engineering( halogen atom vacancies )is introduced into active sites, and then their reaction energy barriers in the four-electron transfer oxygen evolution reaction are calculated. It is found that they have good catalytic performance. Among them, W₂Cl₂ has the best oxygen evolution catalytic performance, and the overpotential is only 1.95 V. Finally, a clear physical image is given by analyzing the coupling between electrons and orbits in detail.

Optical properties of WS₂ with different thickness

WU Chunlin,YANG Mingming,TAN Li,MU Xuanyu,ZHENG Hong,WANG Jiale,LAN Feifei,LI Xiaoli

2024, 44(6):  612-618.  DOI: 10.3969/j.issn.1000-1565.2024.06.006

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In this paper, optical methods are used to study the physical properties of large-area single-layer, few-layer and bulk WS₂ grown on sapphire substrates. Firstly, the atomic force microscope is used to estimate the number of layers of the samples, and the X-ray diffraction is used to judge their single-crystal properties. Then, through Raman spectra and photoluminescence spectra, the optical characteristics of the samples are studied. It is found that the E¹_2g mode and A_1g mode are obvious and sharp, indicating that the lattice structure is relatively complete, and the two modes shift in frequency as the number of layers increases. The direct exciton transition peaks of single-layer and multi-layer WS₂ are both asymmetric indicating that there is charge doping, and their photoluminescence intensity weakens as the number of layers increases. Further, by testing variable excitation power Raman spectra and variable excitation power photoluminescence spectra, it is found that the E¹_2g mode in few-layer and bulk WS₂ does not shift in frequency as the excitation power increases, indicating that the laser thermal effect can be ignored.- DOI:10.3969/j.issn.1000-1565.2024.06.006不同厚度WS₂光学性质吴春林¹,杨明明¹,谭丽¹,穆轩宇¹,郑洪¹,王佳乐¹,兰飞飞²,李晓莉¹(1.河北大学 物理科学与技术学院,河北 保定 071002;2.中国电子科技集团公司 第四十六研究所,天津 300220)摘 要:利用光学手段对蓝宝石衬底上生长的大面积单层、少层、块体WS₂的物理性质进行研究.首先利用原子力显微镜测量样品的厚度估算样品层数,并利用X线衍射测量样品的晶相判断其单晶特性.然后通过拉曼光谱和光致发光光谱技术研究样品的质量和光学特性,发现E¹_2g模和A_1g模明显且尖锐,说明晶格结构比较完整,2个模式随着层数增加发生频移;单层和多层WS₂的直接激子跃迁峰均存在不对称性,说明都存在电荷掺杂,其光致发光强度随着层数增加发生减弱.进一步通过测试变激发功率拉曼光谱和变激发功率光致发光光谱,发现少层、块体WS₂中的E¹_2g模随着激发功率的增加未发生频移,说明激光热效应可以忽略;少层、块体WS₂中的直接激子跃迁峰随激发功率的增加发生频移,说明存在载流子的相互作用;少层WS₂光致发光强度的变化幅度大于块体,这与层间相互作用强弱有关.关键词:WS₂;蓝宝石;化学气相沉积;拉曼光谱;光致发光光谱;变激发功率中图分类号:O433 文献标志码:A 文章编号:1000-1565(2024)06-0612-07Optical properties of WS₂ with different thicknessWU Chunlin¹,YANG Mingming¹,TAN Li¹,MU Xuanyu¹,ZHENG Hong¹,WANG Jiale¹,LAN Feifei²,LI Xiaoli¹(1. College of Physics Science and Technology, Hebei University, Baoding 071002, China;2. The 46th Research Institute of China Electronics Technology Group Corporation, Tianjin 300220, China)Abstract: In this paper, optical methods are used to study the physical properties of large-area single-layer, few-layer and bulk WS₂ grown on sapphire substrates. Firstly, the atomic force microscope is used to estimate the number of layers of the samples, and the X-ray diffraction is used to judge their single-crystal properties. Then, through Raman spectra and photoluminescence spectra, the optical characteristics of the samples are studied. It is found that the E¹_2g mode and A_1g mode are obvious and sharp, indicating that the lattice structure is relatively complete, and the two modes shift in frequency as the number of layers increases. The direct exciton transition peaks of single-layer and multi-layer WS₂ are both asymmetric indicating that there is charge doping, and their photoluminescence intensity weakens as the number of layers increases. Further, by testing variable excitation power Raman spectra and variable excitation power photoluminescence spectra, it is found that the E¹_2g mode in few-layer and bulk WS₂ does not shift in frequency as the excitation power increases, indicating that the laser thermal effect can be ignored.- 收稿日期:2023 -10-30;修回日期:2024-09-09 基金项目:河北省自然科学基金面上项目(A2024201029) 第一作者:吴春林(1997—),男,河北大学在读硕士研究生,主要从事半导体光学方向研究.E-mail:wuchunlin202406@126.com 通信作者:李晓莉(1982—),女,河北大学教授,博士,主要从事半导体光学方向研究.E-mail:xiaolili@hbu.edu.cn 第6期吴春林等:不同厚度WS₂光学性质河北大学学报(自然科学版) 第44卷The direct exciton transition peaks in few-layer and bulk WS₂ shift in frequency as the excitation power increases, indicating that there is carrier-carrier interaction. The variation of the photoluminescence intensity of few-layer WS₂ is larger than that of the bulk, which is related to the strength of the interlayer interaction.

Synthesis and photocatalytic properties of three heteropoly acid quaternary ammonium salts based on Waugh-type structure

GUO Kexin, LIU Xuemei, LI Jinhuan, JI Yue, DING Liqin

2024, 44(6):  619-624.  DOI: 10.3969/j.issn.1000-1565.2024.06.007

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Three heteropoly acid quaternary ammonium salts based on Waugh-type structure,(NH₄)₂［(C₄H₉)₄N］₄MnMo₉O₃₂(1),(NH₄)₂［(C₆H₅CH₂(CH₃)₃N］₄MnMo₉O₃₂(2)and(NH₄)₂［C₆H₅CH₂(CH₂CH₂CH₂CH₃)₃N］₄MnMo₉O₃₂·H₂O(3), were prepared by the solution method using(NH₄)₆MnMo₉O₃₂·9H₂O as a raw material. The compounds were characterized by IR, TG, elemental analysis and XRD. The photocatalytic degradation performance and kinetic behavior of the three compounds on methylene blue simulated dye wastewater were investigated under ultraviolet(UV)irradiation.The results showed that the three compounds exhibited efficient photocatalytic activities on methylene blue simulated dye wastewater, with the degradation rates from 98.28% to 99.64%. The photocatalytic behavior of compound 3 on methylene blue was in accordance with the first-order kinetic characteristics, and the kinetic equation was ln(c₀/c_t)=0.068 2t, the degradation rate constant was 0.068 2 min^-1, and the half-life was 10.2 min.

Synthesis, structure and catalytic properties of complex Cd(Im)₂(p-CH₃C₆H₄SO₃)₂(H₂O)₂

YANG Ruijie, QI Jinyang, ZHANG Yingchun, SHI Yiwei, WANG Min

2024, 44(6):  625-632.  DOI: 10.3969/j.issn.1000-1565.2024.06.008

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Cd(Im)₂(p-CH₃C₆H₄SO₃)₂(H₂O)₂ was prepared by solvothermal synthesis using cadmium nitrate tetrahydrate, sodium p-toluenesulfonate and imidazole as raw materials. It was characterized by X-ray single crystal diffraction, infrared spectroscopy, thermogravimetric analysis and X-ray powder diffraction. The crystal structure was determined by X-ray single crystal diffraction. The crystal structure analysis shows that Cd(Im)₂(p-CH₃C₆H₄SO₃)₂(H₂O)₂ belongs to the Pca2₁ space group of the single crystal oblique system, and its cell parameters are a=2.861 3(5)nm, b=0.580 49(10)nm, c=1.544 3(3)nm, α=90°, β=90°, γ=90°, V=2.565 0(8)nm³, Z=4. The composition and structure of the complex were verified by infrared spectroscopy, the stability of the complex was proved by thermogravimetric analysis, and the purity of the complex was demonstrated by X-ray powder diffraction. The catalytic performance of Cd(Im)₂(p-CH₃C₆H₄SO₃)₂(H₂O)₂ was investigated with Knoevenagel reaction as an example. The experimental results showed that the complex greatly shortened the reaction time and increased the product yield of Knoevenagel reaction, and showed good catalytic activity after repeated use for three times.- DOI:10.3969/j.issn.1000-1565.2024.06.008配合物Cd(Im)₂(p-CH₃C₆H₄SO₃)₂(H₂O)₂的合成、结构及催化性能杨瑞杰,祁金阳,张迎春,史燚威,王敏(渤海大学 化学与材料工程学院,辽宁 锦州 121013)摘 要:以四水合硝酸镉、对甲基苯磺酸钠和咪唑为原料,利用溶剂热合成法制备了Cd(Im)₂(p-CH₃C₆H₄SO₃)₂(H₂O)₂.通过X线单晶衍射法、红外光谱法、热重分析法、X线粉末衍射法对其进行表征.X线单晶衍射法测定其晶体结构,结果表明:Cd(Im)₂(p-CH₃C₆H₄SO₃)₂(H₂O)₂属于单斜晶系的Pca2₁空间群,其晶胞参数为a=2.861 3(5)nm,b=0.580 49(10)nm,c=1.544 3(3)nm,α=90°,β=90°,γ=90°,V=2.565 0(8)nm³,Z=4.红外光谱法验证了其组成结构,热重分析法证明其稳定性较好,X线粉末衍射法说明该配合物的纯度较高.以Knoevenagel反应为例,考察了Cd(Im)₂(p-CH₃C₆H₄SO₃)₂(H₂O)₂的催化性能,实验结果表明,该配合物在催化Knoevenagel反应时,很大程度上缩短了反应时间,提高了产物产率,重复使用3次仍有较好的催化活性.关键词:苯磺酸镉配合物;晶体结构;Knoevenagel反应;催化性能中图分类号:O614.24 文献标志码:A 文章编号:1000-1565(2024)06-0625-08Synthesis, structure and catalytic properties of complexCd(Im)₂(p-CH₃C₆H₄SO₃)₂(H₂O)₂YANG Ruijie, QI Jinyang, ZHANG Yingchun, SHI Yiwei, WANG Min(College of Chemistry and Materials Engineering, Bohai University, Jinzhou 121013, China)Abstract: Cd(Im)₂(p-CH₃C₆H₄SO₃)₂(H₂O)₂ was prepared by solvothermal synthesis using cadmium nitrate tetrahydrate, sodium p-toluenesulfonate and imidazole as raw materials. It was characterized by X-ray single crystal diffraction, infrared spectroscopy, thermogravimetric analysis and X-ray powder diffraction. The crystal structure was determined by X-ray single crystal diffraction. The crystal structure analysis shows that Cd(Im)₂(p-CH₃C₆H₄SO₃)₂(H₂O)₂ belongs to the Pca2₁ space group of the single crystal oblique system, and its cell parameters are a=2.861 3(5)nm, b=0.580 49(10)nm, c=1.544 3(3)nm, α=90°, β=90°, γ=90°, V=2.565 0(8)nm³, Z=4. The composition and structure of the complex were verified by infrared spectroscopy, the stability of the complex was proved by thermogravimetric analysis, and the purity of the complex was demonstrated by X-ray powder diffraction. The catalytic performance of Cd(Im)₂(p-CH₃C₆H₄SO₃)₂(H₂O)₂ was investigated with Knoevenagel reaction as an example. The experimental results showed that the complex greatly shortened the reaction time and increased the product yield of Knoevenagel reaction, and showed good catalytic activity after repeated use for three times.- 收稿日期:2024-01-08;修回日期:2024-04-08 基金项目:教育部产学合作协同育人项目2024年第一批次资助项目(230805940290824) 第一作者:杨瑞杰(1998— ),女,渤海大学在读硕士研究生,主要从事绿色催化方向研究.E-mail:yangruijie1998@163.com 通信作者:王敏(1977—),女,渤海大学教授,博士,主要从事绿色催化化学的研究.E-mail:wangmin@qymail.bhu.edu.cn 第6期杨瑞杰等:配合物Cd(Im)₂(p-CH₃C₆H₄SO₃)₂(H₂O)₂的合成、结构及催化性能河北大学学报(自然科学版) 第44卷

Kidney-tonifying Chinese medicine improves autophagy of Leydig cells in rats with kidney essence deficiency through AMPK-mTOR pathway

LI Chaoying, LI Sirui, ZHANG Wei, MA Haofei, NIU Shuang, DUAN Yulei, NIU Siyun

2024, 44(6):  633-642.  DOI: 10.3969/j.issn.1000-1565.2024.06.009

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In order to explore the mechanism of kidney-tonifying Chinese medicine in improving autophagy of testicular mesenchymal cells in rats with kidney-essence deficiency, a rat model of kidney-essence deficiency was established by single-factor electrical stimulation. Immunohistochemistry and Western blot were used to detect the expression levels of autophagy marker proteins Beclin1, p62, LC3B, AMPK and mTOR in testicular cells of each group. Based on the close relationship between kidney essence deficiency and aging, Leydig cell aging model of testicular mesenchymal cells was established by free radical oxidative damage method, and AMPK inhibitor was combined to explore the molecular mechanism of Heshouwuyin activating autophagy. The results showed that Heshouwuyin could up-regulate the expression of Beclin1 protein and LC3B in testicular tissue, down-regulate the expression of p62 protein,- DOI:10.3969/j.issn.1000-1565.2024.06.009补肾中药通过AMPK-mTOR通路提高肾精亏虚大鼠睾丸间质细胞自噬能力李朝英¹,李思睿²,张伟³,马昊飞²,牛双²,段豫磊²,牛嗣云² (1.河北大学附属医院 新生儿科, 河北 保定 071000;2.河北大学 基础医学院, 河北 保定 071000;3.河北大学附属医院 医学工程中心, 河北 保定 071000)摘 要:为了探究补肾中药提高肾精亏虚大鼠睾丸间质细胞自噬能力的机制,采用单因素电刺激法建立肾精亏虚大鼠模型,免疫组化及Western blot检测各组睾丸细胞自噬标志蛋白Beclin1、p62、LC3B表达水平以及AMPK和mTOR表达变化.基于肾精亏虚与衰老的密切联系,通过自由基氧化损伤法建立睾丸间质细胞(Leydig细胞)衰老模型,联合AMPK抑制剂,探究何首乌饮激活细胞自噬的分子机制.结果显示:何首乌饮可上调睾丸组织Beclin1蛋白、LC3B表达,下调p62蛋白表达,促进AMPK磷酸化并抑制mTOR激活(P<0.05);细胞实验表明,何首乌饮可通过激活AMPK-mTOR信号通路提高Leydig细胞自噬能力(P<0.05),促进肾精亏虚大鼠睾丸Leydig细胞自噬进程.关键词:何首乌饮;肾精亏虚;睾丸组织;自噬;AMPK-mTOR中图分类号:Q291 文献标志码:A 文章编号:1000-1565(2024)06-0633-10Kidney-tonifying Chinese medicine improves autophagy of Leydig cells in rats with kidney essence deficiency through AMPK-mTOR pathwayLI Chaoying¹, LI Sirui², ZHANG Wei³, MA Haofei², NIU Shuang², DUAN Yulei², NIU Siyun²(1. Department of Neonatology, Affiliated Hospital of Hebei University, Baoding 071000, China;2. School of Basic Medical Sciences, Hebei University, Baoding 071000, China;3. Medical Engineering Center, Affiliated Hospital of Hebei University, Baoding 071000, China)Abstract: In order to explore the mechanism of kidney-tonifying Chinese medicine in improving autophagy of testicular mesenchymal cells in rats with kidney-essence deficiency, a rat model of kidney-essence deficiency was established by single-factor electrical stimulation. Immunohistochemistry and Western blot were used to detect the expression levels of autophagy marker proteins Beclin1, p62, LC3B, AMPK and mTOR in testicular cells of each group. Based on the close relationship between kidney essence deficiency and aging, Leydig cell aging model of testicular mesenchymal cells was established by free radical oxidative damage method, and AMPK inhibitor was combined to explore the molecular mechanism of Heshouwuyin activating autophagy. The results showed that Heshouwuyin could up-regulate the expression of Beclin1 protein and LC3B in testicular tissue, down-regulate the expression of p62 protein,- 收稿日期:2024 -02-19;修回日期:2024-05-08 基金项目:国家自然科学基金资助项目(82374180);河北省中医药管理局科研项目(2020234);河北省重点研发计划项目-中医药创新专项(223777134D);河北大学医学学科培育项目(2023B10);河北省高等学校科学技术研究项目(ZD2022060) 第一作者: 李朝英(1980—),女,河北大学附属医院主治医师,主要从事早产儿营养评估.E-mail:lizhaoying725@126.com 通信作者:段豫磊(1994—),男,河北大学实验师,主要从事中药药理方向研究.E-mail:dyl15771@163.com牛嗣云(1967—),女,满族,河北大学教授,博士,博士生导师,主要从事生殖衰老方向研究.E-mail:nsy1688@163.com 第6期李朝英等:补肾中药通过AMPK-mTOR通路提高肾精亏虚大鼠睾丸间质细胞自噬能力河北大学学报(自然科学版) 第44卷promote AMPK phosphorylation and inhibit mTOR activation(P<0.05). Cell experiments showed that Heshouwuyin could affect the autophagy ability of Leydig cells by activating AMPK-mTOR signaling pathway(P<0.05).Therefore, Heshouwuyin may promote the autophagy process of Leydig cells in rats with kidney essence deficiency by activating AMPK-mTOR signaling pathway.

Effects of TMCO1 knockdown on the proliferation, invasion of hepatocellular carcinoma cells

LENG Junzhi, LIU Di, WANG Genwang, LIU Kejun, JIN Dong, WANG Qi, HUI Yongfeng

2024, 44(6):  643-652.  DOI: 10.3969/j.issn.1000-1565.2024.06.010

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To explore the effects of transmembrane and coiled-coil domains 1(TMCO1)knockdown on the proliferation and invasion of hepatocellular carcinoma cells, overexpression and knockdown cell models of TMCO1 in hepatocellular carcinoma cell lines HuH-7 and Li-7 were constructed. Transwell, colony formation, mitochondrial permeability transition pore(mPTP)probes, mitochondrial membrane potential(JC-1)probes, Actin-Tracker Green-488 staining, Western blotting and co-immunoprecipitation tests were used to detect the effects of TMCO1 knockdown on hepatocellular carcinoma cells proliferation, invasion, mitochondrial function, cytoskeletal remodeling, and VDAC1 expression. The results indicated that TMCO1 knockdown inhibited the proliferation and invasion of hepatocellular carcinoma cells, affected mitochondrial function and cytoskeletal remodeling, and downregulated VDAC1 expression.

Robust fuzzy least squares twin parametric-margin support vector machine algorithm

YANG Guiyan, HUANG Chengquan, LUO Senyan, CAI Jianghai, WANG Shunxia, ZHOU Lihua

2024, 44(6):  653-665.  DOI: 10.3969/j.issn.1000-1565.2024.06.011

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As least squares twin parameter-margin support vector machines(LSTPMSVM)are sensitive to noise and susceptible to outliers in the process of classification, a robust fuzzy least squares twin parameter-margin support vector machine(RFLSTPMSVM)algorithm is proposed. The algorithm uses 2-norm of the slack variables to make the optimization problem strongly convex, and then assigns appropriate weights to each data sample based on the fuzzy affiliation values, which reduces the influence of outliers effectively. At the same time, the algorithm introduces K-nearest neighbour weighting into the objective function, considering the local information of samples and improving the accuracy of the model. In addition, the algorithm is optimised by solving a simple system of linear equations, rather than solving quadratic programming problems, giving the model a faster computational speed. The proposed algorithm is assessed and compared with TWSVM, LSTSVM, LSTPMSVM and ULSTPMSVM on some UCI datasets.- DOI:10.3969/j.issn.1000-1565.2024.06.011鲁棒的模糊最小二乘双参数间隔支持向量机算法杨贵燕¹,黄成泉²,罗森艳¹,蔡江海¹,王顺霞¹,周丽华¹(1.贵州民族大学 数据科学与信息工程学院,贵州 贵阳 550025;2.贵州民族大学 工程技术人才实践训练中心,贵州 贵阳 550025)摘 要:针对最小二乘双参数间隔支持向量机(LSTPMSVM)对噪声敏感且在分类过程中易受异常值影响的问题,提出了一种鲁棒的模糊最小二乘双参数间隔支持向量机算法(RFLSTPMSVM).该算法利用松弛变量的2范数使得优化问题具有强凸性,再根据隶属度为每个样本分配相应的权重,有效降低异常值带来的影响.同时,在目标函数中引入K-近邻加权,考虑样本之间的局部信息,提高模型的分类准确率.此外,通过求解简单的线性方程组来优化该算法,而不是求解二次规划问题,使模型具有较快的计算速度.在UCI(university of California irvine)数据集上对该算法进行性能评估,并与TWSVM、LSTSVM、LSTPMSVM和ULSTPMSVM 4种算法进行比较.数值实验结果表明,该算法具有更好的泛化性能.关键词:双参数间隔支持向量机;孪生支持向量机;模糊隶属度;K-近邻中图分类号:TP181 文献标志码:A 文章编号:1000-1565(2024)06-0653-13Robust fuzzy least squares twin parametric-margin support vector machine algorithmYANG Guiyan¹, HUANG Chengquan², LUO Senyan¹, CAI Jianghai¹, WANG Shunxia¹, ZHOU Lihua¹(1.School of Data Science and Information Engineering, Guizhou Minzu University,Guiyang 550025,China; 2. Engineering Training Center, Guizhou Minzu University, Guiyang 550025, China)Abstract: As least squares twin parameter-margin support vector machines(LSTPMSVM)are sensitive to noise and susceptible to outliers in the process of classification, a robust fuzzy least squares twin parameter-margin support vector machine(RFLSTPMSVM)algorithm is proposed. The algorithm uses 2-norm of the slack variables to make the optimization problem strongly convex, and then assigns appropriate weights to each data sample based on the fuzzy affiliation values, which reduces the influence of outliers effectively. At the same time, the algorithm introduces K-nearest neighbour weighting into the objective function, considering the local information of samples and improving the accuracy of the model. In addition, the algorithm is optimised by solving a simple system of linear equations, rather than solving quadratic programming problems, giving the model a faster computational speed. The proposed algorithm is assessed and compared with TWSVM, LSTSVM, LSTPMSVM and ULSTPMSVM on some UCI datasets.- 收稿日期:2024-06-06;修回日期:2024-07-10 基金项目:国家自然科学基金资助项目(62062024);贵州省省级科技计划项目(黔科合基础-ZK［2021］一般342);贵州省教育厅自然科学研究项目(黔教技［2022］015);贵州省模式识别与智能系统重点实验室2022年度开放课题(GZMUKL［2022］KF03) 第一作者:杨贵燕(1997—),女,贵州民族大学在读硕士研究生,主要从事机器学习、模式识别等研究. E-mail:2393350042@qq.com 通信作者:黄成泉(1976—),男,贵州民族大学教授,博士,主要从事机器学习、模式识别、图像处理等研究. E-mail:hcq@gzmu.edu.cn. 第6期杨贵燕等:鲁棒的模糊最小二乘双参数间隔支持向量机算法河北大学学报(自然科学版) 第44卷The numerical experiments results show that the proposed algorithm has better generalization performance.

Neural mechanism of disgust based on event-related brain network analysis

ZANG Qian, ZHAO Xiaoming, LI Yongzhi, LOU Cunguang, LI Ruichang

2024, 44(6):  666-672.  DOI: 10.3969/j.issn.1000-1565.2024.06.012

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Disgust, as a fundamental negative emotion, is universally present in human life and profoundly influences individuals cognition and behavioral patterns. While high temporal resolution event-related potential(ERP)analysis has shown advantages in extracting disgust emotion processing, its limitations in revealing interactions between different brain regions should not be overlooked. In this study, through in-depth analysis of early posterior negativity(EPN)and its neural sources, electroencephalogram(EEG)brain networks were constructed based on the time-frequency maximal information coefficient(TFMIC)method, and complex network analysis was introduced to explore the generation and modulation mechanisms of disgust emotion induced by pictures stimuli. The results indicate that compared to neutral emotions, disgust emotion not only elicits more significant EPN waveforms but also- DOI:10.3969/j.issn.1000-1565.2024.06.012基于事件相关脑网络分析的厌恶情绪神经机制研究臧倩^{1, 2},赵小茗^2,3,李勇志^2,3,娄存广^2,3,李瑞昌^2,4(1. 河北大学 学生心理健康与发展中心,河北 保定 071002;2.河北大学 河北省数字医疗工程重点实验室,河北 保定 071002;3.河北大学 电子信息工程学院,河北 保定 071002;4.福建中医药大学 人文与管理学院,福建 福州 350122)摘 要:厌恶情绪作为一种基本的负性情绪,在人类生活中普遍存在并深刻影响着个体的认知与行为模式.尽管高时间分辨率的事件相关电位分析在提取厌恶情绪信息处理进程方面展现出优势,但其在揭示大脑各区域间交互作用方面的局限性亦不容忽视.本研究在深入分析早期后部负波(early posterior negativity,EPN)及其神经来源的基础上,基于时频最大信息系数(TFMIC)方法构建EEG(electroencephalogram)脑网络,并引入复杂网络分析,探索了图片刺激诱发的厌恶情绪的产生与调制机制.结果显示,相较于中性情绪,厌恶情绪不仅诱发了更为显著的EPN波形,还显示出激活脑区的差异性.进一步的脑网络分析表明,厌恶情绪状态下的大脑网络连接更为紧密,特征路径长度显著缩短,而聚类系数则显著增大.结果表明,结合事件相关电位的脑网络分析能够有效揭示厌恶情绪与中性情绪在时空层面的差异,为深入理解负性情绪的神经机制提供了新的视角与思路.关键词:厌恶; 早期后部负波; 脑网络; 源分析; 负性情绪中图分类号: TP391 文献标志码:A 文章编号:1000-1565(2024)06-0666-07Neural mechanism of disgust based on event-related brain network analysisZANG Qian^1,2, ZHAO Xiaoming^2,3, LI Yongzhi^2,3, LOU Cunguang^2,3, LI Ruichang^2,4(1. Center for Student Mental Health and Development, Hebei University, Baoding 071002, China; 2. Key Laboratory of Digital Medical Engineering of Hebei Province, Hebei University, Baoding 071002, China;3. College of Electronic and Information Engineering, Hebei University, Baoding 071002, China; 4. College of Humanity and Management, Fujian University of Traditional Chinese Medicine, Fuzhou 350122,China)Abstract: Disgust, as a fundamental negative emotion, is universally present in human life and profoundly influences individuals cognition and behavioral patterns. While high temporal resolution event-related potential(ERP)analysis has shown advantages in extracting disgust emotion processing, its limitations in revealing interactions between different brain regions should not be overlooked. In this study, through in-depth analysis of early posterior negativity(EPN)and its neural sources, electroencephalogram(EEG)brain networks were constructed based on the time-frequency maximal information coefficient(TFMIC)method, and complex network analysis was introduced to explore the generation and modulation mechanisms of disgust emotion induced by pictures stimuli. The results indicate that compared to neutral emotions, disgust emotion not only elicits more significant EPN waveforms but also- 收稿日期:2024-04-30;修回日期:2024-06-06 基金项目:河北省自然科学基金资助项目(F2021201002);河北省高等学校科学技术研究项目(ZD2020146) 第一作者:臧倩(1988—),女,河北大学讲师,主要从事高校心理咨询以及负性情绪机制研究.E-mail:hbuzangqian@163.com 通信作者:李瑞昌(1993—),男,福建中医药大学讲师,主要从事医疗数据处理与分析.E-mail:ruilicary@163.com 第6期臧倩等:基于事件相关脑网络分析的厌恶情绪神经机制研究河北大学学报(自然科学版) 第44卷demonstrates differences in activating brain areas. Further brain network analysis revealed that under the state of disgust emotion, brain network connections were more tightly linked, with a significantly shortened characteristic path length and an increased clustering coefficient. These findings suggest that combining event-related potential brain network analysis can effectively reveal the spatiotemporal differences between disgust and neutral emotions, providing a new perspective and approach for understanding the neural mechanisms of negative emotions.