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25 March 2025, Volume 45 Issue 2

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Design method of circular anti-slide pile-arch retaining plates

LING Xianzhang, LU Fan, CONG Shengyi, ZHU Teng

2025, 45(2):  113-122.  DOI: 10.3969/j.issn.1000-1565.2025.02.001

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A new arched sheet-pile retaining wall was proposed by employing circular anti-slide piles, which are more suitable for mechanical drilling than rectangular piles used in current pile sheet retaining walls, and precast arch retaining plate. On this basis, based on the static equilibrium conditions and strength conditions between the anti-slip piles, and based on the soil arch effect, the method of determining the reasonable pile spacing of the new arched sheet-pile retaining wall support system was proposed. Moreover, the calculating formulae for the bending moment and shear force of the cantilever section of the anti-slip piles were derived. The equation of soil pressure of the retaining plate considering the soil arch effect was established by the force transfer mechanism of the retaining plate between the anti-slip piles. Based on a cutting slope along the high-speed railway in Northeast China, the above established design method was applied to an engineering example and the reliability of the design method was verified by numerical simulation. This study puts forward preliminary reference on the application of arched sheet-pile retaining wall in engineering.

Experimental study and finite element analysis of axial compressive properties of new anti-void precast square concrete-filled steel tube columns

GUO Jiayi, YAN Xiangyu, ZHANG Haoze, CHEN Zhihua, BAI Chengjun

2025, 45(2):  123-130.  DOI: 10.3969/j.issn.1000-1565.2025.02.002

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In order to solve the interface defects problem of concrete-filled square steel tubular(CFSST)column, post-poured CFSST column is proposed in this paper. The axial compression tests on specimens were conducted to investigate the failure pattern and the bearing capacity,and the formula for calculating its axial compressive capacity is presented. The finite element analysis considering the parameters such as reserved gap thickness and different self-compacting concrete strength were carried out to study the axial compression performance to prevent interface cavitation defects. The results indicate that precast square steel-reinforced concrete columns cast with self-compacting concrete strength can effectively avoid the occurrence of interface voids. The ultimate bearing capacity is higher than that of current CFSST with the same strength grade. For example, using a 20mm reserved gap and C40 concrete, the bearing capacity is increased by approximately 4%, and the peak load corresponds to a larger displacement. The deformation capacity of the specimens is improved. Increasing the strength grade of the concrete can effectively enhance its axial compression performance. When choosing C40 concrete, the ultimate- DOI:10.3969/j.issn.1000-1565.2025.02.002新型防脱空预制方钢管混凝土柱轴压性能试验研究及有限元分析郭家逸¹,闫翔宇^1,2,张浩泽¹,陈志华¹,白成军¹(1.天津大学 建筑工程学院,天津 300072;2.天津理工大学 海洋能源与智能建设研究院,天津 300384)摘 要:为解决方钢管混凝土柱施工过程中出现的钢管与混凝土界面脱空问题,提出一种后浇自密实灌浆料的预制方钢管混凝土柱,通过轴压试验研究其力学性能和破坏模式,并提出其轴压承载力计算公式,参数化分析预留缝隙厚度、后浇灌浆料强度等因素对该新型防脱空预制方钢管混凝土柱轴压性能的影响规律.结果表明:浇筑自密实灌浆料的预制方钢管混凝土柱能够有效避免界面脱空现象的出现,且极限承载力高于相同强度等级现浇钢管混凝土柱,20 mm预留缝隙使用C40灌浆料后,其承载力约提升4%,峰值荷载对应位移更大,试件变形能力得到提高;提高后浇灌浆料强度等级可以有效提高其轴压性能,选取C40灌浆料时相比选用C30灌浆料极限承载力可提高4.65%.关键词:防脱空预制方钢管混凝土柱轴压性能;界面脱空;有限元分析中图分类号:TU398.9 文献标志码:A 文章编号:1000-1565(2025)02-0123-08Experimental study and finite element analysis of axial compressive properties of new anti-void precast square concrete-filled steel tube columnsGUO Jiayi¹, YAN Xiangyu^1,2, ZHANG Haoze¹, CHEN Zhihua¹, BAI Chengjun¹(1. School of Civil Engineering,Tianjin University,Tianjin 300072,China;2. Institute of Ocean Energy and Intelligent Construction, Tianjin University of Technology, Tianjin 300384,China)Abstract: In order to solve the interface defects problem of concrete-filled square steel tubular(CFSST)column, post-poured CFSST column is proposed in this paper. The axial compression tests on specimens were conducted to investigate the failure pattern and the bearing capacity,and the formula for calculating its axial compressive capacity is presented. The finite element analysis considering the parameters such as reserved gap thickness and different self-compacting concrete strength were carried out to study the axial compression performance to prevent interface cavitation defects. The results indicate that precast square steel-reinforced concrete columns cast with self-compacting concrete strength can effectively avoid the occurrence of interface voids. The ultimate bearing capacity is higher than that of current CFSST with the same strength grade. For example, using a 20mm reserved gap and C40 concrete, the bearing capacity is increased by approximately 4%, and the peak load corresponds to a larger displacement. The deformation capacity of the specimens is improved. Increasing the strength grade of the concrete can effectively enhance its axial compression performance. When choosing C40 concrete, the ultimate- 收稿日期:2024-06-06;修回日期:2024-11-11 基金项目:国家重点研发计划项目(2019YFD1101005) 第一作者:郭家逸(2000—),男,天津大学在读硕士研究生,主要从事组合结构方向研究.E-mail:guojy23@qq.com 通信作者:闫翔宇(1980—),男,天津大学高级工程师,博士,主要从事钢结构、空间结构和组合结构等方向研究.E-mail:yanxy@email.tjut.edu.cn 第2期郭家逸等:新型防脱空预制方钢管混凝土柱轴压性能试验研究及有限元分析河北大学学报(自然科学版) 第45卷bearing capacity is increased by 4.65%.

Robust dynamic optimization of high-speed herringbone gear transmission system

ZHANG Yao,FENG Wei,ZHANG Guojian,SHANG Long,FAN Yaning,YUAN Xinyu

2025, 45(2):  131-139.  DOI: 10.3969/j.issn.1000-1565.2025.02.003

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To investigate a robust optimization design method for the dynamic performance of gear transmission systems, a high-speed herringbone gear transmission system is selected as the research object. First, a finite element model for dynamic analysis is established, and the vibration acceleration of the gearbox housing is calculated using the modal superposition method. Seven key structural parameters of the gearbox are chosen as design variables for dynamic optimization, with the objective of minimizing the root mean square(RMS)value of the surface vibration acceleration. The optimal design variables are obtained through the 6σ robust optimization method. Finally, vibration characteristic experiments are conducted on the optimized prototype. The results indicate that the gearbox housing does not experience resonance before or after optimization, with the acceleration reduced by more than 26.1% after optimization. Furthermore, the reliability of the optimized structure exceeds 97.1%.

Mechanical properties and electronic structure of two-dimensional M₂Cl₂(M:Mg,Ca,Sr,Ba)

WANG Bojing, HOU Yina, WANG Ruining

2025, 45(2):  140-147.  DOI: 10.3969/j.issn.1000-1565.2025.02.004

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In order to explore new two-dimensional nanomaterials and their physical properties, the stability, mechanical properties and electronic structure of two-dimensional alkaline earth metal chlorides with ABAB-stacked mode are studied based on the first-principles method of density functional theory.The results show that the first predicted two-dimensional M₂Cl₂( M: Mg, Ca, Sr, Ba )has dynamic stability and can be synthesized in the laboratory. The material has good ductility and outstanding resistance to volume deformation and shear resistance. Further analysis shows that the vertical electric field can break the symmetry between the two layers of alkaline earth metal atoms and cause the phase transition from semiconductor to metal. When the electric field increases to a certain threshold, magnetism can be induced. This study shows that two-dimensional alkaline earth metal chlorides are a kind of nanomaterials with excellent mechanical and magnetic properties, and have broad application prospects in spintronic devices and flexible electronic devices.

Junction-temperature measurement for life expecpancy of LED lighting products

WU Deqi, YU Bin, ZHAO Nannan, LI Weiting, CHU Xiaoxing

2025, 45(2):  148-156.  DOI: 10.3969/j.issn.1000-1565.2025.02.005

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The life expectancy of LED lighting products has reached tens of thousands of hours. How to forecast LED’s life expectancy by accelerated life testing method has become a hot topic. Thermal stress method has been widely accepted and could be an ideal method for accelerating life measurement. However, how to measure the junction-temperature, which is closely related to the lifetime prediction, hasn’t been solved properly.A junction-temperature indirect test method by testing the change in junction voltage was introduced in this paper, and the possible influence on lifetime prediction caused by junction-temperature test error was analyzed in detail.

A fluorescent probe for biothiols based on isophorone

JIANG Ningning, ZHOU Keyan, LIU Hongmei, LI Xiaoxing, YANG Yutao

2025, 45(2):  157-164.  DOI: 10.3969/j.issn.1000-1565.2025.02.006

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Small molecule biothiols play vital roles in living organisms, and abnormal concentrations can lead to various diseases. Therefore, developing new methods to detect biothiol levels is very important for human health. Fluorescent probes, known for their simple operation, high selectivity, high sensitivity, and fast response, are particularly useful for this purpose. In this study, a near-infrared fluorescent probe, DCI-AC-NBS, was designed and synthesized for biothiols detection, incorporating a 2,4-dinitrobenzenesulfonyl group as the recognition moiety and an isophorone derivative as the fluorophore. Through a nucleophilic substitution-cyclization reaction between DCI-AC-NBS and biothiols, a coumarin derivative, DCI-COU, was produced, exhibiting excellent fluorescence properties. The DCI-AC-NBS has the advantages of high selectivity, a low detection limit, and a large Stokes shift for biothiols, making it suitable for real-time monitoring of intracellular biothiol level changes, thereby providing a new approach for in vivo biothiol detection.

Preparation of MOF-801/polymer monolithic column and solid phase extraction of isovitexin

LIU Ping, LIU Haiyan

2025, 45(2):  165-175.  DOI: 10.3969/j.issn.1000-1565.2025.02.007

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Isovitexin is a natural active substance of carboglycoside flavonoids, which has many pharmacological activities such as anti-cancer and anti-inflammation, but its content in medicinal plants is low, and the Chinese herbal medicine extract has some problems such as complex matrix. Therefore, it is necessary to establish a suitable method to enrich and purify isovitexin. In this paper, MOF material MOF-801 was first prepared, and the surface of MOF material was derivatized with —COOH group, so that it had a C=C terminal. Then, it was mixed with comonomer(methyl lauryl acrylate, LMA), cross-linking agent(ethylene glycol dimethacrylate), pore-forming agent(n-hexanol)and initiator(azodiisobutyronitrile)to prepare MOF-801/polymer monolithic column. Then, MOF-801 and MOF-801/ polymer monolithic column were characterized by scanning electron microscope(SEM), FT-IR and nitrogen adsorption-desorption method, which showed that the polymer monolithic column had been successfully synthesized. MOF-801/polymer monolithic column was used as solid-phase extraction(SPE)- DOI:10.3969/j.issn.1000-1565.2025.02.007MOF-801/聚合物整体柱的制备及对异牡荆素的固相萃取柳苹,刘海燕(河北大学 药学院,河北省公共卫生安全重点实验室,药物化学与分子诊断教育部重点实验室,河北 保定 071002)摘 要:异牡荆素是一种天然的碳苷黄酮类活性物质,具有抗癌、抗炎等多种药理活性,但是其有效成分的分离纯化是开发的难点和关键.因此,制备了MOF材料MOF-801,利用MOF材料上带有的—COOH基团,对其进行衍生化反应,使其表面带有C=C终端,然后与共聚单体(甲基丙烯酸月桂酯,LMA)、交联剂(乙二醇二甲基丙烯酸酯)、致孔剂(正己醇)和引发剂(偶氮二异丁腈)混合均匀后制备MOF-801/聚合物整体柱.通过扫描电子显微镜(SEM)、红外光谱(FT-IR)和氮气吸附-脱附等方法进行表征,结果显示,MOF-801和MOF-801/聚合物整体柱均已成功合成.将MOF-801/聚合物整体柱用作固相萃取(SPE)吸附剂,通过与高效液相色谱(HPLC)仪联用对中药中的抗癌活性成分异牡荆素进行在线富集纯化.结果显示,所制备的聚合物整体柱对异牡荆素具有较好的富集能力,并能去除中药中的部分杂质.关键词:聚合物整体柱;固相萃取(SPE);异牡荆素;MOF-801中图分类号:O658 文献标志码:A 文章编号:1000-1565(2025)02-0165-11Preparation of MOF-801/polymer monolithic column and solid phase extraction of isovitexinLIU Ping, LIU Haiyan(Key Laboratory of Medicinal Chemistry and Molecular Diagnosis Ministry of Education, Key Laboratory of Public Health Safety of Hebei Province, College of Pharmacy, Hebei University, Baoding 071002, China)Abstract: Isovitexin is a natural active substance of carboglycoside flavonoids, which has many pharmacological activities such as anti-cancer and anti-inflammation, but its content in medicinal plants is low, and the Chinese herbal medicine extract has some problems such as complex matrix. Therefore, it is necessary to establish a suitable method to enrich and purify isovitexin. In this paper, MOF material MOF-801 was first prepared, and the surface of MOF material was derivatized with —COOH group, so that it had a C=C terminal. Then, it was mixed with comonomer(methyl lauryl acrylate, LMA), cross-linking agent(ethylene glycol dimethacrylate), pore-forming agent(n-hexanol)and initiator(azodiisobutyronitrile)to prepare MOF-801/polymer monolithic column. Then, MOF-801 and MOF-801/ polymer monolithic column were characterized by scanning electron microscope(SEM), FT-IR and nitrogen adsorption-desorption method, which showed that the polymer monolithic column had been successfully synthesized. MOF-801/polymer monolithic column was used as solid-phase extraction(SPE)- 收稿日期:2024-05-29;修回日期:2024-11-06 基金项目:国家自然科学基金资助项目(21974034) 第一作者:柳苹(1998—),女,河北大学在读硕士研究生,主要从事分离材料制备方向研究.E-mail:2761787123@qq.com 通信作者:刘海燕(1971—),女,河北大学教授,博士,主要从事分离材料的制备及对天然产物中抗癌活性成分的富集纯化研究. E-mail:lhy1610@hbu.edu.cn 第2期柳苹等:MOF-801/聚合物整体柱的制备及对异牡荆素的固相萃取河北大学学报(自然科学版) 第45卷adsorbent, and the anticancer active ingredient isovitexin was enriched and purified online by combining with high performance liquid chromatography(HPLC). The results showed that the prepared polymer monolithic column has good ability to enrich isovitexin and remove impurities.

Synthesis and in vitro antitumor activity of photodynamic therapy reagent based on tetraphene skeleton

FANG Kexin, LIU Haitong, WANG Shuxiang

2025, 45(2):  176-184.  DOI: 10.3969/j.issn.1000-1565.2025.02.008

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A photodynamic therapy(PDT)reagent, LT-TPE-DB-BNO₂ for reactive oxygen species(ROS)generation based on tetraphene(TPE), was synthesized from 4-bromobenzoylbenzene, 4,4’-dimethoxybenzophenone, p-nitrobenzyl bromide(Br-BNO₂)and azide lactose(LT)by nucleophilic substitution, suzuki coupling and click reaction. The stability of LT-TPE-DB-BNO₂ in serum and at different pH value, and the ability of ROS generation were investigated by spectrophotometry and confocal fluorescence microscopy. The effects of LT-TPE-DB-BNO₂ on the viability of HeLa and BRL-3A cells were investigated by MTT method and live and dead cell double staining method. The results showed that LT-TPE-DB-BNO₂ was stable in serum and at different pH value. In the dark condition,it had a little effect on the activity of HeLa and BRL-3A cells. Under irradiation by xenon lamp, ROS was produced by LT-TPE-DB-BNO₂, and the activity of HeLa cells was reduced by 88.3%, indicating that LT-TPE-DB-BNO₂ is a highly efficient PDT reagent.

EMR cross-domain sharing scheme based on consortium chain and proxy re-encryption

YANG Xiaohui,QIN Xuhan

2025, 45(2):  185-191.  DOI: 10.3969/j.issn.1000-1565.2025.02.009

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Electronic medical records(EMR)can be safely and efficiently shared across domains, bringing great convenience to patients seeking medical treatment across domains. However, traditional centralized electronic medical record management methods have security issues such as privacy leakage, single point of failure, and medical record ownership, which are not conducive to patients seeking medical treatment across domains. This article proposes a cross-domain sharing scheme for electronic medical records based on consortium chain and proxy re-encryption. By combining blockchain and Inter Planetary File System, a distributed file storage system is provided to avoid the problem of single point of failure caused by centralized management. Patients authorize cross-domain data users to decrypt medical record ciphertext through proxy re-encryption algorithms, ensuring that only authorized users can access files and achieving ciphertext conversion between different trust domains. This scheme can resist multiple types of attacks and has a lower computational cost.

Multimodal sentiment analysis method based on improved FGM-CM-BERT model

LI Renzheng, GAO Guandong, SONG Shengzun, XIAO Ke

2025, 45(2):  192-203.  DOI: 10.3969/j.issn.1000-1565.2025.02.010

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In response to the challenges of weak generalization ability and inefficient feature fusion in multimodal sentiment analysis methods using speech-text data, an improved FGM-CM-BERT model was proposed. The Fast Gradient Method(FGM)was enhanced for adversarial training to improve model generalization and a multi-head attention mechanism was employed to extract and fuse multimodal features for enhanced algorithm accuracy. Firstly, based on the features of multimodal data, an adaptive parameter adjustment strategy for the FGM weight function was introduced, using an input-data-based approach to enhance the models generalization ability at the embedding layer through adaptive perturbations. Secondly,- DOI:10.3969/j.issn.1000-1565.2025.02.010基于改进的FGM-CM-BERT模型多模态情感分析方法李仁正¹,高冠东²,宋胜尊³,肖珂¹(1.河北农业大学 信息科学与技术学院,河北 保定 071001;2. 中央司法警官学院 信息管理系,河北 保定 071000;3. 中央司法警官学院 监狱学学院,河北 保定 071000)摘 要:针对语音文本多模态情感分析方法中泛化能力弱和特征融合效率低的问题,提出了一种改进的FGM-CM-BERT模型,改进快速梯度法(FGM)以对抗训练提升模型泛化能力,并采用多头注意力机制提取融合多模态特征,以提升算法准确度.首先,根据多模态数据特征,通过一种基于输入数据特征的自适应参数调整策略来改进FGM权重函数,在embedding层增加自适应扰动提升模型泛化能力;其次,在跨模态交互层提出利用多头自注意力机制,通过将文本查询和音频键值对交叉融合,在特征融合效率与模型复杂度之间达到了较好的平衡;最后,实验采用CMU-MOSI和CMU-MOSEI数据集,对比了常用的15个基线模型,结果表明:该模型在七类情绪评分分类及二元情绪分类的准确率较基线模型均有所提升,分别达到了48.2%和87.5%,验证了该方法的有效性.关键词:多模态情感分析;快速梯度法;多头注意力机制;对抗训练;自适应扰动;跨模态特征融合中图分类号:TP391.1 文献标志码:A 文章编号:1000-1565(2025)02-0192-12Multimodal sentiment analysis method based on improved FGM-CM-BERT modelLI Renzheng¹, GAO Guandong², SONG Shengzun³, XIAO Ke¹(1. College of Information Science,Hebei Agricultural University, Baoding 071001, China; 2. Department of Information Management,The National Police University for Criminal Justice, Baoding 071000,China; 3. Department of Penology, The National Police University for Criminal Justice, Baoding 071000, China)Abstract: In response to the challenges of weak generalization ability and inefficient feature fusion in multimodal sentiment analysis methods using speech-text data, an improved FGM-CM-BERT model was proposed. The Fast Gradient Method(FGM)was enhanced for adversarial training to improve model generalization and a multi-head attention mechanism was employed to extract and fuse multimodal features for enhanced algorithm accuracy. Firstly, based on the features of multimodal data, an adaptive parameter adjustment strategy for the FGM weight function was introduced, using an input-data-based approach to enhance the models generalization ability at the embedding layer through adaptive perturbations. Secondly,- 收稿日期:2024-10-12;修回日期:2024-12-11 基金项目:国家自然科学基金资助项目(31801782);河北省社会科学基金资助项目(HB21ZZ002) 第一作者:李仁正(1998—),男,河北农业大学在读硕士研究生,主要从事自然语言处理方向研究.E-mail:1064149655@qq.com 通信作者:高冠东(1979—),男,中央司法警官学院教授,博士,主要从事机器视觉、大数据分析技术方向研究.E-mail:gaoguandong@sina.com 第2期李仁正等:基于改进的FGM-CM-BERT模型多模态情感分析方法河北大学学报(自然科学版) 第45卷at the cross-modal interaction layer, leveraging a multi-head self-attention mechanism was proposed to a good balance is achieved between feature fusion efficiency and model complexity by cross-fusing textual queries with audio key-value pairs. Finally, experiments conducted on the CMU-MOSI and CMU-MOSEI datasets compare the model against 15 commonly used baseline models. The results demonstrated that the model achieved improved accuracy over baseline models in seven-class emotion score classification and binary emotion classification, reaching 48.2% and 87.5% respectively, validating the effectiveness of the proposed method.

Non paired CMR image enhancement based on improved CycleGAN

ZHENG Wei, WU Yubo, FENG Xiaomeng, MA Zepeng,SONG Tierui

2025, 45(2):  204-215.  DOI: 10.3969/j.issn.1000-1565.2025.02.011

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During the process of cardiac magnetic resonance imaging(CMR), patient misoperation, respiratory movement, and arrhythmia can cause a decrease in CMR image quality. To solve the problem of manually creating paired data and losing some tissue texture details after image enhancement in existing CMR image enhancement networks This paper proposes a cycle consistent generative adversarial network based on spatial frequency domain feature learning(SFFL CycleGAN). The research results show that this network does not require manually creating paired datasets, and the enhanced CMR images have rich texture details. It is superior to existing paired training networks and the original CycleGAN network in terms of Structural Similarity(SSIM)and Peak Signal to Noise Ratio(PSNR). The image enhancement effect is good and effectively assists in disease diagnosis.

Multimodal online comment sentiment analysis for disinformation

ZHANG Guofang,YUAN Guoqiang,ZHAO Shengli

2025, 45(2):  216-224.  DOI: 10.3969/j.issn.1000-1565.2025.02.012

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In this paper, firstly,the vector representations of text words in comment data are obtained by using Glove word embedding and bidirectional long short-term memory networks. Then, the syntactic information, semantic information, and contextual information of the words are used to construct a heterogeneous fusion graph and combined with graph attention mechanism to learn the text features in the comments. Furthermore, the expression symbol features obtained on the basis of the auto-encoder method are fused through a multi-layer perceptron, and an emotional polarity vector about the disinformation comment content is output. The research results indicate that compared with all baseline models, the multimodal sentiment analysis model proposed in this paper can fully explore the potential interaction between emoticon and text when social network users express their opinions and emotions. This can more effectively evaluate the emotional tendency of disinformation comments, characterize the emotional attitudes or attributes of network users, and achieve effective classification of user emotions. Furthermore, the proposed model provides theoretical support for proposing strategies to suppress false propagation in social networks based on sentiment analysis results, in terms of user sentiment classification.