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25 March 2021, Volume 41 Issue 2

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Derivations and crossed modules of 3-Lie-Rinehart algebras

BAI Ruipu, LI Xiaojuan

2021, 41(2):  113-118.  DOI: 10.3969/j.issn.1000-1565.2021.02.001

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For a given commutative associative algebra A, and a 3-Lie algebra L and a 3-Lie A -algebra R over a field F of characteristic zero, derivations from the 3-Lie-Rinehart algebra(L,A,ρ)to the 3-Lie A -algebra(R,A), and crossed modules(R,A,β,∂)of 3-Lie-Rinehart algebras are studied. Derivations from 3-Lie-Rinehart algebras to 3-Lie A-algebras are characterized by means of 3-Lie-Rinehart algebra homomorphisms.

Sensorless control of permanent magnet synchronous motor based on predictive adaptation

CHENG Liang, DAI Tian, DONG Zijian

2021, 41(2):  119-125.  DOI: 10.3969/j.issn.1000-1565.2021.02.002

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The traditional sensorless control system of permanent magnet synchronous motor has the problems of poor dynamic performance and low accuracy of speed signal observation.In order to solve these problems,a new sensorless control method for permanent magnet synchronous motor is designed. The online gradient descent method is used to design a second-order linearly expanded state observer.The second-order linearly expanded state observer can accurately and quickly estimate the speed of permanent magnet synchronous motor under the condition of motor load disturbance or sudden speed change. In this paper the adaptive sliding mode control system is applied to the speed control system, and the predictive adaptive method is used to estimate the disturbance of permanent magnet synchronous motor for real-time current compensation. The simulation results show that the second-order linearly extended state observer designed can accurately and quickly estimate the speed, and has strong anti-interference ability; the predictive adaptive sliding mode control strategy effectively shortens the speed response time of the motor, significantly weakens the chattering of the motor speed and electromagnetic torque, showing good dynamics and robustness.

Analysis on the migration law of muddy silty sand reservoir under the condition of gas drive sand control experiment

YU Li,CHEN Yanping,HE Jibin,YE Chengming

2021, 41(2):  126-132.  DOI: 10.3969/j.issn.1000-1565.2021.02.003

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A large amount of oil, gas and water resources are stored in the argillaceous siltstone, but its exploitation is always limited due to its low permeability condition and sand control difficulty. In this work, the sand control and gas production laws are analyzed by setting N2 displacement experiment under cut condition. After comparing the vertical grain grading curve of the displacement reservoir before and after the test, it is found that the grain grading curve before and after the test does not coincide, which indicates that after the test, the particles of the reservoir have migrated and rearranged, forming the structure of “mud skin + sand arch” which combines the fine particles and sand arch. It takes the stable sand arch as the support and its fine particle structure as the sand blocking structure to block the fine particles together with transport of granular materials. Through the scanning electron microscope, it is found that there are pinhole like pores in the fine-grained layer, which ensures the gas production without blocking. This work provides a reference for similar projects.

Excited dissociation analysis of H₂S by pulse plasma streamer discharge

ZHANG Miao, ZHANG Lianshui

2021, 41(2):  133-139.  DOI: 10.3969/j.issn.1000-1565.2021.02.004

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The excited dissociation process of H₂S by pulsed plasma streamer discharge has been studied by using plasma fluorescence spectra and time-resolved spectra. The fluorescence spectra between 400 and 800 nm have been assigned to the transition of S₂, S^-₂, H, SH. Experiment results indicated that the main flexibility particles are H₂S^*, S₂, S^-₂, H and SH in pulsed plasma streamer discharge of H₂S. The results of time-resolved spectra indicated that the fluorescence signal of H and SH appeared almost simultaneously. The main excited dissociation channel of H₂S is H₂S+e^*→H₂S^*+e→H^*+SH^*.

Square superlattice pattern of dielectric barrier discharge gap with modulation effect

WANG Zhaoyang,XU Hongzhi,LI Caixia,GUO Liting,YU Guanglin

2021, 41(2):  140-146.  DOI: 10.3969/j.issn.1000-1565.2021.02.005

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In the dielectric barrier discharge(DBD)based on hydropower poles, glass plates with 9 identical square holes arranged in regular symmetry are used as the boundary to obtain a number of hyperquadrilateral speckled patterns with the same cell structure, and their spatio-temporal dynamics are studied to analyze the mechanism of speckled pattern formation.The results show that each unit pattern is nested by three square substructures with different side lengths, the first square substructure geometric center in small unit is composed of four with faint dot, second condom nested structure in the first square substructure is made up of small point on the side of a square apex Angle and the twelve point near the border of a square structure constitute the third condom.Two photomultiplier tubes were used to simultaneously- DOI:10.3969/j.issn.1000-1565.2021.02.005具有调制作用的介质阻挡放电气隙中的超四边形斑图王朝阳¹,徐洪志²,李彩霞³,郭丽婷¹,于广林¹(1. 河北大学 物理科学与技术学院,河北 保定 071002;2. 32142部队,河北 保定 071000;3.河北大学 电子信息工程学院,河北 保定 071002)摘 要:在基于水电极的介质阻挡放电中,采用了带有9个相同且规则对称排列的正方形孔的玻璃板作为边界,得到了多个具有相同单元格结构的超四边形斑图,并对其时空动力学进行研究,分析了斑图形成的机制.结果表明每个单元斑图由边长不同的3个正方形子结构嵌套而成,第1个正方形子结构在小单元几何中心位置由4个小点组成,第2套子结构嵌套在第1个正方形子结构外围,由小正方形顶角和边上的点组成,靠近边界的12个点组成的正方形构成第3套子结构.用2个光电倍增管同时测量每套正方形子结构中任选2个点的时间相关性,得到每个正方形子结构中各个点的放电在时间上的一致性.本实验表明当气隙单元格的边长D与各单元格之间的间距d比值为2时,同样条件下,不同单元格之间的放电没有相互作用,放电斑图存在统一性,这对于小面积调制气隙的放电研究具有一定意义.关键词:发光斑图;介质阻挡放电;调制作用;壁电荷;重复单元中图分类号:O43 文献标志码:A 文章编号:1000-1565(2021)02-0140-07Square superlattice pattern of dielectric barrier discharge gap with modulation effect WANG Zhaoyang¹,XU Hongzhi²,LI Caixia³,GUO Liting¹,YU Guanglin¹(1.College of Physics Science and Technology, Hebei University, Baoding 071002, China;2.Troop of No. 32142,Baoding 071000,China;3.College of Electronic Information Engineering, Hebei University, Baoding 071002, China)Abstract: In the dielectric barrier discharge(DBD)based on hydropower poles, glass plates with 9 identical square holes arranged in regular symmetry are used as the boundary to obtain a number of hyperquadrilateral speckled patterns with the same cell structure, and their spatio-temporal dynamics are studied to analyze the mechanism of speckled pattern formation.The results show that each unit pattern is nested by three square substructures with different side lengths, the first square substructure geometric center in small unit is composed of four with faint dot, second condom nested structure in the first square substructure is made up of small point on the side of a square apex Angle and the twelve point near the border of a square structure constitute the third condom.Two photomultiplier tubes were used to simultaneously- 收稿日期:2020-01-09 基金项目:国家自然科学基金资助项目(11375051); 河北省自然科学基金资助项目(A2018201154;15961105D); 河北省教育厅科研基金资助项目(QN2017023;LJRC011) 第一作者:王朝阳(1995—),男,河北邢台人,河北大学在读硕士研究生,主要从事非线性介质阻挡放电斑图的研究.E-mail:651274436@qq.com 通信作者:李彩霞(1975—),女,河北衡水人,河北大学副教授,河北大学在读博士,主要从事非线性光学介质阻挡放电斑图的研究.E-mail:46020911@qq.com第2期王朝阳等:具有调制作用的介质阻挡放电气隙中的超四边形斑图measure the time correlation of any two points in each square substructure, and the time consistency of the discharge at each point in each square substructure was obtained.This experiment shows that when the ratio of the side length D of the air gap cell to the distance d between each cell is 2, under the same conditions, there is no interaction among the discharge of repeated cells, and there is uniformity in the discharge spot pattern, which is of certain significance for the discharge study of small area modulated air gap.

Effect of the amylose/amylopectin ratio on the millet starch retrogradation by asymmetrical flow field-flow fractionation

SONG Tiange, ZHANG Jing, CHEN Xue, SHEN Shigang, DOU Haiyang

2021, 41(2):  147-154.  DOI: 10.3969/j.issn.1000-1565.2021.02.006

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Retrogradation is the process of rearrangement of molecular chains after starch gelatinization. In order to explore effect of the amylose/amylopectin ratio on the millet starch retrogradation, alkaline glycerin was used to extract amylose from millet starch.Asymmetrical flow field-flow fractionation(AF4), differential scanning calorimetry. Fourier transform infrared spectroscopy, scanning electron microscopy,and X-ray diffraction were employed to characterize the morphology, crystal structure, crystallinity, gelatinization and retrogradation of millet starch with three different amylose/amylopectin ratios.It was found that alkaline glycerin treatment had slight effect on the morphology, crystal structure, and gelatinization temperature of millet starch.The content of amylose in three millet starch samples was in the following order: waxy millet starch <millet starch treated with alkaline glycerin< normal millet starch.Three starch samples after gelatinization were stored at 4 ℃ for 7 days. AF4 result showed that the retrogradation degree of millet starch is positively correlated with amylose content.

Synthesis and antibacterial evaluation of L-arginine curcumin derivative

LI Haiying, QIU Mingheng, CHEN Jian, WANG Guijing, YANG Wenzhi

2021, 41(2):  155-160.  DOI: 10.3969/j.issn.1000-1565.2021.02.007

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L-arginine based curcumin derivative with a succinic acid linker(Cur-Sa-Arg)was synthesized via esterification and amidation reaction using 4-dimethylaminopyridine(DMAP)and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide(EDC)as catalyzer. The product was characterized by UV-Vis, FT-IR, ¹H NMR and DSC, and the results indicated that Cur-Sa-Arg was successfully synthesized. The curcumin solubility in Cur-Sa-Arg was more than about 3 000 times higher than curcumin and reached up to 30.1 μg/mL. Moreover, the result of bacteriostatic experiment showed that the IC₅₀ values against Gram-negative bacteria including Pseudomonas aeruginosa, Escherichia coli and Salmonella ratus decreased by 3—6 times, and the IC₅₀ value against Gram-positive bacteria of Staphylococcus aureus dropped by 2 times. Compared with pure curcumin, Cur-Sa-Arg has a higher solubility and better antibacterial properties.

Effects of interface effects on the macroscopic elastoplastic properties of nanoporous materials

MA Lianhua, ZHOU Jingbo, CAO Yakuo

2021, 41(2):  161-165.  DOI: 10.3969/j.issn.1000-1565.2021.02.008

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For the porous materials with nanoscale voids, the interface effect between the solid matrix and the void has a great influence on the macroscopic elastoplastic properties of such material. Through the theoretical analysis, this work treated the typical mathematical interfacial model describing the interface effects as the interfacial phase model with a certain thickness, and developed a material model of the interfacial phase model using the UMAT subroutine of ABAQUS software. On this basis, the finite element numerical method is employed to study the effects of porosity, pore size and interfacial residual stress on the macroscopic elastoplastic tensile and compressive mechanical properties of nanoporous metals. The results show that the increasing porosity causes the effective elastic modulus and the yield strength to decrease in magnitudes when the pore size and the interfacial residual stress keep constant. the increasing pore size leads to the increase of the effective yield strength and the flow stress when the porosity and the interface residual stress are constant. The interfacial residual stress induces the asymmetry of the tension-compression- DOI:10.3969/j.issn.1000-1565.2021.02.008界面效应对纳米多孔材料宏观弹塑性力学性能的影响马连华^1,2,周靖博²,曹亚阔²(1.河北大学 质量技术监督学院,河北 保定 071002;2.河北大学 建筑工程学院,河北 保定 071002)摘 要:当多孔材料的孔洞为纳米尺度时,基体/孔洞的界面效应会对这种材料的弹塑性力学性能产生较大影响.本文通过理论分析将描述界面效应的传统数学界面模型等效为具有一定厚度的界面相模型,并基于ABAQUS的UMAT子程序开发了界面相材料模型.以此为基础,采用有限元数值模拟的方法,研究了孔隙率、孔径尺寸及界面残余应力对纳米多孔金属材料宏观弹塑性拉伸-压缩性能的影响.结果表明,孔径尺寸和界面残余应力一定时,孔隙率增大引起有效弹性模量和屈服强度减小;若孔隙率与界面残余应力保持不变,孔径尺寸增大会引起有效屈服强度和流动应力增大;界面残余应力会导致纳米多孔金属拉伸-压缩曲线存在明显的不对称现象;由于界面相的负刚度效应,当纳米多孔金属变形到一定程度时呈现出软化现象,即宏观应力随变形增加而减小.关键词:纳米多孔材料;弹塑性;界面效应;有限元;应力软化中图分类号:O341 文献标志码:A 文章编号:1000-1565(2021)02-0161-05Effects of interface effects on the macroscopic elastoplastic properties of nanoporous materialsMA Lianhua^1,2, ZHOU Jingbo², CAO Yakuo²(1. School of Quality and Technical Supervision, Hebei University, Baoding 071002, China;2. College of Civil Engineering and Architecture, Hebei University, Baoding 071002, China)Abstract: For the porous materials with nanoscale voids, the interface effect between the solid matrix and the void has a great influence on the macroscopic elastoplastic properties of such material. Through the theoretical analysis, this work treated the typical mathematical interfacial model describing the interface effects as the interfacial phase model with a certain thickness, and developed a material model of the interfacial phase model using the UMAT subroutine of ABAQUS software. On this basis, the finite element numerical method is employed to study the effects of porosity, pore size and interfacial residual stress on the macroscopic elastoplastic tensile and compressive mechanical properties of nanoporous metals. The results show that the increasing porosity causes the effective elastic modulus and the yield strength to decrease in magnitudes when the pore size and the interfacial residual stress keep constant. the increasing pore size leads to the increase of the effective yield strength and the flow stress when the porosity and the interface residual stress are constant. The interfacial residual stress induces the asymmetry of the tension-compression- 收稿日期:2020-03-14 基金项目:国家自然科学基金面上项目(11572109);2019年度河北省引进留学人员资助项目(C20190318);河北省教育厅在读研究生创新能力培养项目(CXZZSS2020009);河北省高等学校科学技术研究重点项目(ZD2017006) 第一作者:马连华(1979—),男,河北衡水人,河北大学副教授,博士,主要从事复合材料力学研究.E-mail:lhma@hbu.edu.cn第2期马连华等:界面效应对纳米多孔材料宏观弹塑性力学性能的影响curves of the nanoporous metal, and due to the negative stiffness of the interfacial phase, the nanoporous metal exhibits the stress softening phenomenon. That is the macroscopic stress decreases as the deformation increases when the material deforms to a certain degree.

Renal clearance of a photothermal therapy agent based on quaterrylene-cyclodextrin conjugates

LI Jinmei, LUO Yali, WANG Kerang

2021, 41(2):  166-170.  DOI: 10.3969/j.issn.1000-1565.2021.02.009

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Photothermal therapy(PTT)is a promising avenue for precision cancer treatment. However, the metabolic clearance is a key issue for future clinical applications. In this paper, renal clearance of a cyclodextrin-modified quaterrylene bisimide derivative(QDI-CD)was studied. Importantly, QDI-CD administered to sprague-dawley(SD)rats by intraperitoneal injection was effectively cleared with renal clearance efficiency of(48.74 ± 11.80)% at 12 h after drug injection. In addition, the structure of QDI-CD in urines did not changed under the metabolism.

Rhythm of birds activity in winter at airport and the effect of snow cover on bird community

ZHANG Kan, LIN Qingqian, LIU Qiqi, WANG Chen, HOU Jianhua

2021, 41(2):  171-179.  DOI: 10.3969/j.issn.1000-1565.2021.02.010

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In order to master the pattern of bird activity at the airport in winter, to provide a theoretical basis for the prevention and control of airport bird strikes, in the winter of 2018—2019, the bird activity pattern and the influence of snow cover on the bird community were studied by sample line method. The results showed that 19 species of birds under 7,11 were recorded in winter, Among them, the resident and winter migratory birds are the main body of the winter airport bird community, and bird species are mainly finch-shaped omnivorous and valley-eating birds. Between 9:00 and 10:00 am, the number of species and individual density of birds is maximum. E3 and F3 areas are the most frequent areas of bird activity. After the snow, Individual density of birds increased significantly(P<0.05). However, the density of bird species decreased significantly(P<0.05). Bare patches are the main environmental factors that attract birds into airport activities. Beta diversity turnover groups in exposed and transition areas were higher than nested groups, indicating that birds have the ability to diffuse from bare to transitional areas. Sparrow-shaped omnivorous and valley-eating birds, 9:00—10:00 and 13:00—14:00, E3 and F3 areas and exposed patches after snow cover should be the objects, periods and areas of the airport's winter focus and regulation. - DOI:10.3969/j.issn.1000-1565.2021.02.010机场冬季鸟类活动规律及雪被对鸟类群落的影响张侃,林庆乾,刘琪琪,王晨,侯建华(河北大学 生命科学学院,河北 保定 071002)摘 要:为了掌握冬季机场鸟类的活动规律,给机场鸟击防治工作提供理论依据,2018—2019年冬季采用样线法对冬季机场内鸟类活动规律及雪被对鸟类群落的影响进行了研究.结果表明:机场冬季共记录到鸟类19 种,隶属7 目11 科,其中留鸟和冬候鸟是冬季机场鸟类群落的主体,鸟类物种以雀形目杂食性和食谷鸟类为主.上午9:00—10:00鸟类物种数量和个体密度最大.E3区和F3区是鸟类活动最频繁的区域.覆雪后,鸟类个体密度显著增加(P<0.05),但鸟类物种密度显著下降(P<0.05),裸露区是吸引鸟类进入机场活动的主要环境因素.裸露区与过渡区的Beta多样性周转分组高于嵌套分组,表明鸟类有从裸露区向过渡区扩散的能力.雀形目杂食性和食谷鸟类、9:00—10:00和13:00—14:00、E3区和F3区及裸露区应作为机场冬季重点关注和整治的对象、时段和区域.关键词:机场;鸟类;活动规律;雪被中图分类号:Q958.1 文献标志码:A 文章编号:1000-1565(2021)02-0171-09Rhythm of birds activity in winter at airport and the effect of snow cover on bird communityZHANG Kan, LIN Qingqian, LIU Qiqi, WANG Chen, HOU Jianhua(College of Life Sciences, Hebei University, Baoding 071002, China)Abstract: In order to master the pattern of bird activity at the airport in winter, to provide a theoretical basis for the prevention and control of airport bird strikes, in the winter of 2018—2019, the bird activity pattern and the influence of snow cover on the bird community were studied by sample line method. The results showed that 19 species of birds under 7,11 were recorded in winter, Among them, the resident and winter migratory birds are the main body of the winter airport bird community, and bird species are mainly finch-shaped omnivorous and valley-eating birds. Between 9:00 and 10:00 am, the number of species and individual density of birds is maximum. E3 and F3 areas are the most frequent areas of bird activity. After the snow, Individual density of birds increased significantly(P<0.05). However, the density of bird species decreased significantly(P<0.05). Bare patches are the main environmental factors that attract birds into airport activities. Beta diversity turnover groups in exposed and transition areas were higher than nested groups, indicating that birds have the ability to diffuse from bare to transitional areas. Sparrow-shaped omnivorous and valley-eating birds, 9:00—10:00 and 13:00—14:00, E3 and F3 areas and exposed patches after snow cover should be the objects, periods and areas of the airport's winter focus and regulation. - 收稿日期:2020-05-16 基金项目:机场鸟情调查及环境治理方案制定(2019—2021);河北大学自然科学研究计划项目(2014-299) 第一作者:张侃(1996—),男,河北邢台人,河北大学在读硕士研究生,主要从事动物学研究.E-mail:1179678964@qq.com 通信作者:侯建华(1968—),男,河北保定人,河北大学教授,主要从事动物生态学研究.E-mail:13633325718@163.com第2期张侃等:机场冬季鸟类活动规律及雪被对鸟类群落的影响

Effects of different invasion time of Flaveria bidentis on soil microbial function

WANG Yan, DU Ewei, MENG Yanliang, SUN Jianru, SANG Xiaoling, ZHANG Fengjuan

2021, 41(2):  180-187.  DOI: 10.3969/j.issn.1000-1565.2021.02.011

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By using the homologous garden test, Biolog technique was used to compare the utilization of carbon sources in the rhizosphere soil microorganisms of Flaveria bidentis and Setaria viridis and analyzed the changes of functional diversity at different times(5 years, 7 years and 9 years).The results showed that:After different time of invasion,the average well color development(AWCD)values of F+S treatments were higher than those of F treatment under different invasive years.Compared with other treatments,the McIntosh index U of F+S treatment was higher;with the increase of invasion time,the McIntosh index U of F+S treatment increased significantly;the Simpson index D of the F treatment increased significantly,its McIntosh index U gradually decreased and was significantly smaller than the S treatment at 9 years of colonization.Compared with other treatments, F+S treatment promoted the absorption of lipids, sugars and amino acids by soil microorganisms. Compared to colonization for 5 and 7 years,- DOI:10.3969/j.issn.1000-1565.2021.02.011黄顶菊入侵不同时间对土壤微生物功能的影响王妍,杜鄂巍,蒙彦良,孙建茹,桑晓玲,张风娟(河北大学 生命科学学院,河北 保定 071002)摘 要:通过同质园试验,采用Biolog技术比较黄顶菊(Flaveria bidentis)定植不同时间(5年、7年、9年)其与狗尾草根际土壤微生物对碳源的利用能力,分析其功能多样性的变化.结果表明:定植不同时间,黄顶菊与本地植物狗尾草混合种植小区(简称F+S处理)的平均颜色变化率都高于黄顶菊单一种植小区(简称F处理);与其他处理相比,F+S处理的均匀度指数U较高;随着定植时间的延长,F+S处理的均匀度指数U显著增加;F处理的优势度指数D显著增加,其均匀度指数U逐渐下降,并在定植9年时显著小于狗尾草单一种植小区(简称S处理);与其他处理相比,F+S处理促进了土壤微生物对脂类、糖类和氨基酸的吸收,与定植5年和7年相比,定植9年F+S处理的土壤微生物对脂类的利用能力显著提高,对糖类利用能力显著降低.由此可知,黄顶菊入侵后定植不同时间对土壤微生物的功能产生了影响.因此,探究外来植物根际土壤微生物功能随时间变化的一般规律,有助于进一步揭示外来植物的入侵机制.关键词:黄顶菊;土壤微生物;功能多样性;竞争生长;Biolog中图分类号:Q948.11 文献标志码:A 文章编号:1000-1565(2021)02-0180-08Effects of different invasion time of Flaveria bidentis on soil microbial function WANG Yan, DU Ewei, MENG Yanliang, SUN Jianru, SANG Xiaoling, ZHANG Fengjuan(College of Life Sciences, Hebei University, Baoding 071002, China)Abstract: By using the homologous garden test, Biolog technique was used to compare the utilization of carbon sources in the rhizosphere soil microorganisms of Flaveria bidentis and Setaria viridis and analyzed the changes of functional diversity at different times(5 years, 7 years and 9 years).The results showed that:After different time of invasion,the average well color development(AWCD)values of F+S treatments were higher than those of F treatment under different invasive years.Compared with other treatments,the McIntosh index U of F+S treatment was higher;with the increase of invasion time,the McIntosh index U of F+S treatment increased significantly;the Simpson index D of the F treatment increased significantly,its McIntosh index U gradually decreased and was significantly smaller than the S treatment at 9 years of colonization.Compared with other treatments, F+S treatment promoted the absorption of lipids, sugars and amino acids by soil microorganisms. Compared to colonization for 5 and 7 years,- 收稿日期:2020-04-16 基金项目:国家自然科学基金资助项目(31972343);河北省自然科学基金资助项目(C2019201059);河北大学研究生创新项目(hbu2019ss026) 第一作者:王妍(1995—),女,山东济南人,河北大学硕士研究生,主要从事入侵生物学研究.E-mail:1007276126@qq. com 通信作者:张风娟(1969—),女,河北唐山人,河北大学教授,博士,主要从事植物学与生态学方向研究.E-mail:Fengjuanzhang@126.com第2期王妍等:黄顶菊入侵不同时间对土壤微生物功能的影响soil microorganisms in F+S treatment significantly improved the utilization of lipids and reduced the utilization of sugars in F. bidentis colonization for 9 years, respectively. It can be seen that the different times of F. bidentis colonization have an impact on the function of soil microorganism.Therefore, exploring the general laws of the function of alien plant rhizosphere soil microorganisms over time will help to further reveal the invasion mechanism of alien plants.

Analysis of the correlation between drug resistance of Pseudomonas aeruginosa and antibiotics use density

ZHANG Xinying, HAN Ying, WANG Yamei, DU Fengqin, ZHANG Jin, CAO Songyun

2021, 41(2):  188-194.  DOI: 10.3969/j.issn.1000-1565.2021.02.012

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To provide scientific basis for the clinical rational use of antimicrobial agents, the trend of drug resistance rate of Pseudomonas aeruginosa and the annual dosage of antimicrobial agents in the same period from January 1, 2016 to December 31, 2019 in a hospital were retrospectively investigated, the frequency of use was calculated, and the correlation between the antibiotics use density(AUD)and drug resistance rate of P. aeruginosa was analyzed. Analysis results show that the drug resistance rate of P. aeruginosa to piperacillin/tazobactam, gentamicin, cefoperazone/sulbactam, cefoperazone, cefepime, imipenem- DOI:10.3969/j.issn.1000-1565.2021.02.012铜绿假单胞菌耐药性与抗菌药物使用强度相关性分析张新颖¹,韩颖¹,王雅妹¹,杜凤芹¹,张晋¹,曹松云²(1.河北大学附属医院 感染控制办公室,河北 保定 071000;2.保定市第一中医院 药物临床试验机构办公室,河北 保定 071000)摘 要:为了给临床合理使用抗菌药物提供科学依据,回顾性调查了医院2016年1月1日至2019年12月31日铜绿假单胞菌耐药率变化趋势及同一时间段抗菌药物年用量,计算使用频度,分析了抗菌药物使用强度与铜绿假单胞菌(Pseudomonas aeruginosa)耐药率的相关性.分析结果显示:铜绿假单胞菌对哌拉西林/他唑巴坦、庆大霉素、头孢哌酮/舒巴坦、头孢哌酮、头孢吡肟、亚胺培南西司他丁、氨曲南、阿米卡星、奈替米星和左氧氟沙星的耐药率均呈下降趋势;碳青霉烯类、三代头孢抗菌药物使用强度(antibiotics use density,AUD)增长明显(P<0.05),头孢吡肟、大环内酯类AUD下降明显(P<0.05),哌拉西林/他唑巴坦、氨基糖苷、喹诺酮类、单环β内酰胺类AUD无显著变化(P>0.05);碳青霉烯类、三代头孢AUD与铜绿假单胞菌耐药率呈正相关(r=0.523、0.605,P<0.05),哌拉西林/他唑巴坦、单环β内酰胺类、喹诺酮类、大环内酯类、氨基糖苷类、四代头孢与铜绿假单胞菌耐药率无关(r=0.012~0.136,P>0.05).分析结果表明:2016年1月1日至2019年12月31日医院铜绿假单胞菌的耐药率控制较好,铜绿假单胞菌耐药率与抗菌药物使用强度有关.临床应重视对抗生素的管理,减少细菌耐药的产生及其对人类健康的威胁.关键词:铜绿假单胞菌;耐药性;抗菌药物;使用强度 中图分类号:R96;R446.5 文献标志码:A 文章编号:1000-1565(2021)02-0188-07Analysis of the correlation between drug resistance of Pseudomonas aeruginosa and antibiotics use densityZHANG Xinying¹, HAN Ying¹, WANG Yamei¹, DU Fengqin¹, ZHANG Jin¹, CAO Songyun²(1. Infection Control Office, Affiliated Hospital of Hebei University, Baoding 071000, China; 2. Clinical Trial Agency Office, Baoding No.1 Hospital of TCM, Baoding 071000, China)Abstract: To provide scientific basis for the clinical rational use of antimicrobial agents, the trend of drug resistance rate of Pseudomonas aeruginosa and the annual dosage of antimicrobial agents in the same period from January 1, 2016 to December 31, 2019 in a hospital were retrospectively investigated, the frequency of use was calculated, and the correlation between the antibiotics use density(AUD)and drug resistance rate of P. aeruginosa was analyzed. Analysis results show that the drug resistance rate of P. aeruginosa to piperacillin/tazobactam, gentamicin, cefoperazone/sulbactam, cefoperazone, cefepime, imipenem- 收稿日期:2020-07-16 基金项目:河北大学附属医院青年科研资金资助项目(2016Q013) 第一作者:张新颖(1984—),女,河北保定人,河北大学附属医院主治医师,主要从事医院感染控制研究.E-mail:hdfyzxy@163.com 通信作者:曹松云(1986—),女,河北望都人,保定市第一中医院主管中药师,主要从事药物临床试验研究.E-mail:songyuncao@163.com第2期张新颖等:铜绿假单胞菌耐药性与抗菌药物使用强度相关性分析cisstatine, aztreonam, amikacin, netilmicin and levofloxacin showed a decreasing trend. Carbapenems and third-generation cephalosporins showed significant increases in AUD(P<0.05), cefepime and macrolides showed significant decreases in AUD(P<0.05), while piperacillin/tazobactam, aminoglycosides, quinolones and monocyclic β-lactams showed no significant changes in AUD(P>0.05). The AUD of carbapenem and third-generation cephalosporins was positively correlated with the drug resistance rate of P. aeruginosa(r=0.523, 0.605, P<0.05), piperacillin/tazobactam, monocyclic β-lactams, quinolones, macrolides, aminoglycosides, fourth-generation cephalosporins were not correlated with the drug resistance rate of P. aeruginosa(r=0.012~0.136, P>0.05). Our study demonstrates that from January 1, 2016 to December 31, 2019, the drug resistance rate of P. aeruginosa in hospital was well controlled, and the drug resistance rate of P. aeruginosa was related to the AUD. Clinical attention should be paid on the management of antibiotics to reduce the generation of bacterial resistance and its threat to human health.

Reproductive growth of engineered strains of Auricularia polytricha cells under Auricularia auricularia bran matrix

LIU Wei, XU Fan, YANG Chaoshang, GENG Danmeng, ZHANG Tiejun, WANG Qian

2021, 41(2):  195-200.  DOI: 10.3969/j.issn.1000-1565.2021.02.013

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The Auricularia polytricha(Mont.)Sacc cell engineering strain Xinheda SL205 was used as the test strain, the A. auricularia bran was used as the main reproductive growth substrate, and the mycelium growth rate and reproductive growth biological efficiency were used as indicators. Different medium formulations were designed and tested.The optimal medium formulations were selected for the Xinheda SL205 strain: A. auricularia bran is 50%(mass fraction), sawdust 30%, corn cob 10%, bran 8% and lime 2%. Under this medium, the average growth rate of Xinheda SL205 was 7.26 mm/d, and the biological efficiency was 126.29%. It had the strongest biodegradation ability for A. auricularia bran, effectively reducing the non-point source pollution caused by A. auricularia bran.

Text sentiment classification approach with integrated local and global prominent features

CHAI Bianfang, YANG Lei,WANG Jianling,LI Renling

2021, 41(2):  201-211.  DOI: 10.3969/j.issn.1000-1565.2021.02.014

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The model combining convolutional neural network(CNN)with Bi-directional long short-term memory(BiLSTM)feature(CNN_BiLSTM)is popular for sentiment analysis. It takes into account the local and global features to realize sentiment classification of the text. However, it ignores the importance of the features for the classification results, and does not make full use of features between words, which result in low classification efficiency and accuracy. Thus, a model based on a CNN that integrates multiple convolution kernels and a bidirectional long-term and short-term memory network of attention(MCNN_Att-BiLSTM)for- DOI:10.3969/j.issn.1000-1565.2021.02.014集成局部和全局关键特征的文本情感分类方法柴变芳¹,杨蕾¹,王建岭²,李仁玲²(1. 河北地质大学 信息工程学院,河北 石家庄 050031;2. 河北中医学院 图书馆,河北 石家庄 050200)摘 要:融合卷积神经网络(convolutional neural network,CNN)和双向长短期记忆网络(Bi-directional long short-term memory,BiLSTM)的情感分析模型(CNN_BiLSTM)是一个流行的模型,其学习文本的局部特征和全局特征实现情感分类,但是忽略了特征对分类结果的重要程度,且没充分利用词语间的特征,导致分类准确率不高.提出一种集成基于多卷积核的卷积神经网络和注意力双向长短期记忆网络特征的文本情感分类方法(MCNN_Att-BiLSTM),其集成局部和全局的重要特征作为文本语义特征,该特征进而用于训练文本情感分类器XGBoost(eXtreme gradient Boosting).该方法基于注意力机制的BiLSTM提取对分类影响大的全局关键特征,基于多卷积核的CNN获得更全面的词语间特征,为集成分类器准备了有效分类的特征.实验结果表明,该模型具有更好的情感分类准确率,与CNN_BiLSTM模型相比,在IMDB数据集上准确率提升了1.75%,在txt-sentoken数据集上准确率提升了1.67%,在谭松波-酒店评论数据集上准确率提升了3.81%.关键词:情感分析;CNN;BiLSTM;XGBoost;特征融合中图分类号:TP391 文献标志码:A 文章编号:1000-1565(2021)02-0201-11Text sentiment classification approach with integrated local and global prominent featuresCHAI Bianfang¹, YANG Lei¹,WANG Jianling²,LI Renling²(1. College of Information Engineering, Hebei GEO University, Shijiazhuang 050031, China;2. Library, Hebei University of Chinese Medicine, Shijiazhuang 050200, China)Abstract: The model combining convolutional neural network(CNN)with Bi-directional long short-term memory(BiLSTM)feature(CNN_BiLSTM)is popular for sentiment analysis. It takes into account the local and global features to realize sentiment classification of the text. However, it ignores the importance of the features for the classification results, and does not make full use of features between words, which result in low classification efficiency and accuracy. Thus, a model based on a CNN that integrates multiple convolution kernels and a bidirectional long-term and short-term memory network of attention(MCNN_Att-BiLSTM)for- 收稿日期:2020-03-12 基金项目:国家自然科学基金资助项目(81473773);河北省自然科学基金资助项目(F2019403070);河北省教育厅重点项目(ZD2020175) 第一作者:柴变芳(1979—),女,山西运城人,河北地质大学教授,博士,主要从事机器学习、复杂网络分析研究.E-mail:chaibianfang@163.com 通信作者:李仁玲(1973—),女,河北巨鹿人,河北中医学院副研究馆员,主要从事数据检索和大数据分析研究. E-mail:w3365@126.com王建岭(1973—),男,河北巨鹿人,河北中医学院教授,主要从事网络安全和大数据挖掘研究.E-mail:wang_jl@126.com第2期柴变芳等:集成局部和全局关键特征的文本情感分类方法text sentiment classification is proposed. It integrates local and global prominent features as semantic features of the text, which are used as inputs to train a XGBoost(eXtreme gradient Boosting)classifier to realize text sentiment classification. It utilizes the attention mechanism based on the BiLSTM to fully captain the global prominent features that affect the classification results largely. In addition, it utilizes the CNN with multi-convolution kernel to obtain more comprehensive inter-word features. Experimental results show that the model is better compared to the CNN_BiLSTM model, which improves the accuracy rate by 1.75% on the IMDB dataset, and 1.67% on the txt-sentoken dataset, and 3.81% on the Tan Songbo-hotel review dataset.

Design of online aggregation optimization of big data based on MapReduce

LI Jun

2021, 41(2):  212-217.  DOI: 10.3969/j.issn.1000-1565.2021.02.015

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Aiming at the problems of long execution time, poor execution performance and delayed scheduling performance of big data online aggregation, an optimization program design of big data online aggregation based on MapReduce is proposed. The cluster computing resources of all machines in the cluster can be fully utilized by using the fragment aggregation method, and the heuristic priority method of sub connection is used to optimize the local execution of connection task relation operation of each node, so as to realize the parallel connection of big data online aggregation. The dynamic switch mechanism of big data online aggregation based on hybrid approximate query framework and the dynamic switch mechanism based on progressive approximate estimation are used to reduce the misjudgment rate of hybrid approximate query switching and enhance the execution performance of big data online aggregation. The experimental results show that the online aggregation optimization program designed by this method has less execution time under different data scales, and has significant advantages in basic frequent query performance.

Parameter optimization of main steam temperature system controller based on PSO cuckoo fusion algorithm

WANG Jin, CAI Tiaoyang, REN Meng, LYV Qing

2021, 41(2):  218-224.  DOI: 10.3969/j.issn.1000-1565.2021.02.016

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The main steam temperature system of power plant has the characteristics of large inertia and large time delay. The classical cascade PID control is difficult to implement the precise control of the main steam temperature system. In this paper, the fusion algorithm of particle swarm optimization and cuckoo is used to optimize the controller parameters of the main steam temperature control system. By selecting the appropriate objective function, the main steam temperature control system of a 600 MW once-through boiler is optimized. Compared with the control results of PSO algorithm and practical tuning method, PSO-cuckoo fusion algorithm has better global optimization characteristics, better dynamic performance and anti-interference ability.