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25 January 2024, Volume 44 Issue 1

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Fault diagnosis of rolling bearing based on improved Autogram

LIU Shangkun, ZHANG Wei, SUN Yuhao, KONG Degang, ZHAO Xiaoshun

2024, 44(1):  1-8.  DOI: 10.3969/j.issn.1000-1565.2024.01.001

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To address the problem of inaccurate selection of demodulation frequency band and difficulty in fault diagnosis that may arise when using the unbiased autocorrelation kurtosis index, the square envelope negentropy is introduced into Autogram, and an improved Autogram method using square envelope negentropy index is proposed to select the optimal demodulation frequency band. The square envelope negentropy is less affected by noise and can measure the impact of period signal. Firstly, the bearing vibration signal is decomposed into different frequency bands by maximum overlapping discrete wavelet packet transform. Then the square envelope negentropy of each frequency band is calculated, and the optimal frequency band which has the maximum square envelope negentropy value is selected. Finally, the bearing fault type is diagnosed by analyzing the square envelope spectrum of the optimal demodulation frequency band. The analysis results of fault bearing experimental signals by improved Autogram, Autogram, and fast kurtogram method showed that the improved Autogram method is more reasonable in the selecting demodulation frequency band, and more obvious in extracting fault frequency, and more accurately in diagnosing bearing faults.- DOI:10.3969/j.issn.1000-1565.2024.01.001基于改进Autogram的滚动轴承故障诊断刘尚坤,张伟,孙宇浩,孔德刚,赵晓顺(河北农业大学 机电工程学院,河北 保定 071001)摘 要:针对Autogram以无偏自相关峭度指标选取解调频带时易出现不准确、故障诊断困难的问题,将平方包络负熵引入Autogram中,结合平方包络负熵受噪声影响小且能衡量周期冲击成分的优点,提出一种采用平方包络负熵指标选取最优解调频带的改进Autogram方法.首先采用最大重叠离散小波包变换(MODWPT)对轴承振动信号进行频带分解,再计算每个频带信号的平方包络负熵,将平方包络负熵最大的频带作为最优解调频带,最后通过分析最优解调频带平方包络谱的频率成分来诊断轴承故障类型.将轴承故障实验信号分析结果与Autogram、快速谱峭度方法对比,结果表明,改进Autogram方法在解调频带的选取上更为合理,所提取的故障特征频率更明显,轴承故障诊断更准确.关键词:平方包络负熵;改进Autogram;最优解调频带;故障诊断中图分类号:TH133.33 文献标志码:A 文章编号:1000-1565(2024)01-0001-08Fault diagnosis of rolling bearing based on improved AutogramLIU Shangkun, ZHANG Wei, SUN Yuhao, KONG Degang, ZHAO Xiaoshun(School of Mechanical and Electrical Engineering, Hebei Agricultural University, Baoding 071001, China)Abstract: To address the problem of inaccurate selection of demodulation frequency band and difficulty in fault diagnosis that may arise when using the unbiased autocorrelation kurtosis index, the square envelope negentropy is introduced into Autogram, and an improved Autogram method using square envelope negentropy index is proposed to select the optimal demodulation frequency band. The square envelope negentropy is less affected by noise and can measure the impact of period signal. Firstly, the bearing vibration signal is decomposed into different frequency bands by maximum overlapping discrete wavelet packet transform. Then the square envelope negentropy of each frequency band is calculated, and the optimal frequency band which has the maximum square envelope negentropy value is selected. Finally, the bearing fault type is diagnosed by analyzing the square envelope spectrum of the optimal demodulation frequency band. The analysis results of fault bearing experimental signals by improved Autogram, Autogram, and fast kurtogram method showed that the improved Autogram method is more reasonable in the selecting demodulation frequency band, and more obvious in extracting fault frequency, and more accurately in diagnosing bearing faults.- 收稿日期:2023-05-06;修回日期:2023-09-20 基金项目:河北省重点研发计划项目(22327206D);保定市科技计划项目(2172P003);河北省省属高校基本科研业务费资助项目(KY202014);河北农业大学引进人才科研专项(YJ201814) 第一作者:刘尚坤(1979—),男,河北农业大学副教授,博士,主要从事机械设备状态监测与故障诊断方向研究.E-mail:lsk1213@163.com 通信作者:孔德刚(1986—),男,河北农业大学讲师,主要从事机械设计制造及故障诊断方向研究.E-mail:870714576@qq.com第1期刘尚坤等:基于改进Autogram的滚动轴承故障诊断

Analysis of vibration characteristics of inter-turn short circuit fault of double-fed asynchronous wind turbine generator rotor

PANG Bin, ZHOU Ziye, QI Xiaofan, ZHENG Hansheng

2024, 44(1):  9-16.  DOI: 10.3969/j.issn.1000-1565.2024.01.002

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Aiming at the problem that the fault vibration mechanism of rotor inter-turn short circuit in doubly-fed induction generator is not clear, and it cannot provide a theoretical basis for fault diagnosis, the vibration characteristics of rotor inter-turn short circuit in doubly-fed induction generator are analyzed. Firstly, combined with finite element simulation and analytical derivation, the air gap magnetic density law of doubly-fed induction generator under rotor inter-turn short circuit is analyzed, and the unbalanced magnetic tension force of the rotor is obtained. Secondly, a nonlinear dynamic model of the rotor-bearing system of doubly-fed induction generator considering the rotor unbalanced magnetic tension is constructed, and the vibration simulation signal of the system under rotor inter-turn short circuit is obtained by using the nonlinear dynamic simulation. Finally, the rotor inter-turn short circuit experiment is carried out on the doubly-fed induction generator fault simulation bench, and the validity of the nonlinear dynamic simulation results is verified by experimental analysis. The results of nonlinear dynamics simulation and- DOI:10.3969/j.issn.1000-1565.2024.01.002双馈异步风力发电机转子匝间短路故障振动特性分析庞彬^1,2,周紫烨^1,2,齐晓帆¹,郑涵升^1,2(1.河北大学 质量技术监督学院,河北 保定 071002;2.河北省新能源汽车动力系统轻量化技术创新中心,河北 保定 071002)摘 要:针对双馈异步风力发电机转子匝间短路的故障振动机理尚不明确且无法为故障诊断提供理论依据的问题,开展了双馈异步风力发电机转子匝间短路故障振动特性分析.首先,结合有限元仿真及解析推导,分析转子匝间短路下双馈异步风力发电机的气隙磁密规律,得到转子所受的不平衡磁拉力;然后,考虑转子不平衡磁拉力的情况下构建双馈异步风力发电机转子-轴承系统非线性动力学模型,利用非线性动力学仿真获取转子匝间短路故障下系统的振动仿真信号;最后,在双馈异步风力发电机故障模拟实验台上进行转子匝间短路故障实验,利用实验分析验证非线性动力学仿真结果的有效性.非线性动力学仿真及实验分析结果均表明,转子匝间短路故障下双馈异步风力发电机转子-轴承系统振动信号的频谱存在转频的谐波成分,通过检测转频的谐波分量可诊断双馈异步风力发电机转子匝间短路故障,有效揭示了双馈异步风力发电机转子匝间短路的故障振动机理. 关键词:双馈异步风力发电机;转子匝间短路;非线性动力学;振动特性;故障诊断中图分类号:TK83 文献标志码:A 文章编号:1000-1565(2024)01-0009-08 Analysis of vibration characteristics of inter-turn short circuit fault of double-fed asynchronous wind turbine generator rotor PANG Bin^1,2, ZHOU Ziye^1,2, QI Xiaofan¹, ZHENG Hansheng^1,2(1. College of Quality and Technical Supervision,Hebei University,Baoding 071002,China;2. Hebei Technology Innovation Center for Lightweight of New Energy Vehicle Power System, Baoding 071002, China)Abstract: Aiming at the problem that the fault vibration mechanism of rotor inter-turn short circuit in doubly-fed induction generator is not clear, and it cannot provide a theoretical basis for fault diagnosis, the vibration characteristics of rotor inter-turn short circuit in doubly-fed induction generator are analyzed. Firstly, combined with finite element simulation and analytical derivation, the air gap magnetic density law of doubly-fed induction generator under rotor inter-turn short circuit is analyzed, and the unbalanced magnetic tension force of the rotor is obtained. Secondly, a nonlinear dynamic model of the rotor-bearing system of doubly-fed induction generator considering the rotor unbalanced magnetic tension is constructed, and the vibration simulation signal of the system under rotor inter-turn short circuit is obtained by using the nonlinear dynamic simulation. Finally, the rotor inter-turn short circuit experiment is carried out on the doubly-fed induction generator fault simulation bench, and the validity of the nonlinear dynamic simulation results is verified by experimental analysis. The results of nonlinear dynamics simulation and- 收稿日期:2023-05-05;修回日期:2023-09-04 基金项目:河北省自然科学基金资助项目(E2021201032) 第一作者:庞彬(1988—),男,河北大学讲师,博士,主要从事机械装备状态监测与故障诊断研究.E-mail:baodingpb@hbu.edu.cn第1期庞彬等:双馈异步风力发电机转子匝间短路故障振动特性分析experimental analysis show that the spectrum of the vibration signal of rotor-bearing system of doubly-fed induction generator has the harmonic component of frequency conversion under rotor inter-turn short circuit, and rotor inter-turn short circuit of doubly-fed induction generator can be diagnosed by detecting the harmonic component of the rotating frequency. This study effectively reveals the fault vibration mechanism of the rotor inter-turn short circuit in doubly-fed induction generator.

Diagnosis method of IGBT device wiring faults in photovoltaic inverter

ZHAO Zhiqiang, PAZILAI Mahemuti, LIU Hanghang, ZHOU Ang

2024, 44(1):  17-26.  DOI: 10.3969/j.issn.1000-1565.2024.01.003

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To solve the problem that insulated gate bipolar transistor wiring fault of photovoltaic inverters are difficult to be found and are easily to be ignored, and the existing diagnostic methods are slow and have low recognition rate, a feature extraction strategy based on voltage mean is proposed, and the kernel extreme learning machine(KELM)is optimized using improved loin swarm optimization(ILSO)to achieve fault diagnosis of IGBTs. Firstly, the effect of the Concordia transformation of the three-phase voltage in each state of the inverter is analyzed to obtain a two-dimensional vector that clearly characterizes the fault, and the separability of the wiring fault is verified by a two-dimensional scatter plot. Secondly, the parameters of KELM are optimized by the LSO of Sine chaotic mapping to establish the diagnostic model. Finally, the Z-source inverter is taken as an example for verification. The results show that the proposed method can extract two-dimensional fault features containing rich fault information for IGBT wiring faults of inverters, which greatly simplifies the process of feature extraction. Moreover, the proposed method is suitable for single and double device fault types. Compared with other methods, the proposed method is faster and has higher fault recognition rate.

Three patterns with C_4v symmetry formed in argon dielectric barrier discharge with double gaps and their spatiotemporal relevance

LIU Jingnan, RAN Junxia, WU Kaiyue, WU Jiacun, CHEN Junyu, JIA Pengying

2024, 44(1):  27-33.  DOI: 10.3969/j.issn.1000-1565.2024.01.004

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Patterns are regular structures existed extensively in gas discharge system, which are formed by a series of complex interactions between discharge filaments. Using a specially-designed double gap dielectric barrier discharge device with argon used as the working gas, a dark spots pattern, a -like pattern and a #-like pattern with C_4v symmetry are obtained in this paper. The discharge characteristics of the patterns have been characterized by electrical and optical methods, and their spatiotemporal relevance are studied. The results show that the dark spots pattern is composed of the three parts: the central dark spot, the bright ring, the outer small dark spots on the background of the uniform discharge area. Moreover, the -like pattern and the #-like pattern are composed of five different transient sublattices: the central spot, the side spot, the diagonal vertex, the vertical line and the diagonal line. These results have certain reference value for the in-depth study of the patterns generated by dielectric barrier discharge, and can improve the understanding of more complex patterns in other fields.

Dynamics of finite size quantum Dicke-Stark model

YAN Zhanyuan, LI Xinyang, QIU Fangcheng, CHANG Xizhe, LIU Yang

2024, 44(1):  34-41.  DOI: 10.3969/j.issn.1000-1565.2024.01.005

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Using the hyper completeness of the coherent states space, the truncation problem of the infinite dimensional photon number can be effectively avoided, and the rigorous solutions can be obtained in the finite coherent state space. In this paper, the exact solution of the Dicke-Stark model in the coherent state space are achieved, and then the quantum phase transition and time evolution dynamics of the model are discussed. By calculating the average number of photons and average angular momentum of the ground state of the Dicke-Stark model, the phenomenon of quantum phase transition was reproduced, and the critical point of quantum phase transition would shift with the nonlinear Stark interaction. By calculating the phase diagrams of the average photon number and average angular momentum of the Dicke-Stark model with respect to coupling strength and time evolution, the time evolution dynamics of the Dicke-Stark model were presented, the results are helpful to investigate the dynamics of the finite size quantum Dicke-Stark model.

Research progress on design strategies and structure-activity relationship of anti-Alzheimer thiazole derivatives

SHI Dahua, ZOU Jingpei, ZHANG Xiaoqing, ZHANG Zhaoyuan, HAN Shutong

2024, 44(1):  42-49.  DOI: 10.3969/j.issn.1000-1565.2024.01.006

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Thiazole is a five-membered sulfur-containing and nitrogen heterocyclic compound, which has become one of the widely used chemical frameworks in the field of medicinal chemistry due to its special structure and electronic properties and a variety of biological activities. In the past few decades, thiazole and its derivatives have shown great potential in anti-Alzheimers research, and the chemical structure and design strategy of its derivatives are closely related to anti-Alzheimers activity. Starting from the potential targets of Alzheimers disease, this article reviewed the design strategies and structure-activity research progress of thiazole derivatives with anti-Alzheimers activity in recent years based on acetylcholinesterase dominated single-target or multi-target strategies.

Research progresses on the combined application of curcumin and antineoplastic drugs

LIU Wenqing, YANG Sha, LIU Mingsong, XU Zhidong

2024, 44(1):  50-59.  DOI: 10.3969/j.issn.1000-1565.2024.01.007

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Drug combination therapy can significantly make up for the deficiency of single drug use and accelerate the development of new treatment options for the treatment of complex diseases.Curcumin is a 1,3-diketone compound with a variety of pharmacological effects, and its anti-tumor effect has received extensive attention. Curcumin can inhibit the proliferation of tumor cells and induce apoptosis of tumor cells. It has the characteristics of low toxicity and good tolerance. The study found that the combination of curcumin and clinical anti-tumor drugs has a certain synergistic effect, which can effectively inhibit the growth of cancer cells, decrease the toxic and side effects of drugs, reduce the dosage of drugs, and achieve the effect of synergistic attenuation. In this paper, the effects and possible mechanisms of the combined application of curcumin and anti-tumor drugs were summarized at the level of cells and experimental animals.

Research on potential high-risk invasive alien species in the Beijing-Tianjin-Hebei region

LIU Zhiqi, CHEN Fengxin, SUN Yanan, ZHANG Fengjuan

2024, 44(1):  60-69.  DOI: 10.3969/j.issn.1000-1565.2024.01.008

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In order to effectively improve the prevention and the ability of controlling invasive alien species in the Beijing-Tianjin-Hebei region and ensure regional biosecurity, the high-risk source countries of invasive alien species in the Beijing-Tianjin-Hebei region were determined based on the two major factors of climate environment and economic activities, and the potential high-risk invasive alien species in the Beijing-Tianjin-Hebei region were identified according to the distribution information of dangerous invasive species published by the International Union for Conservation of Nature. The results showed that there were 5 high-risk sources of invasive alien species in the Beijing-Tianjin-Hebei region, namely, the United States, Germany, Russia, Italy and Canada. Among them, the high-risk source countries of invasive alien species in Beijing were the United States, Germany and Russia, and the high-risk source countries of invasive alien species in Tianjin were the United States, Italy and Russia. The high-risk source countries of invasive alien species in Hebei are the United States and Canada. In total, there are 31 potential high-risk- DOI:10.3969/j.issn.1000-1565.2024.01.008京津冀地区潜在高风险外来入侵物种研究刘志祺¹,陈凤新²,孙亚男²,张风娟¹(1.河北大学 生命科学学院,河北 保定 071002;2.河北大学 经济学院,河北 保定 071002)摘 要:为有效提高京津冀地区对外来入侵物种的防控能力,保障区域生物安全,基于气候环境和经济活动两大因素,确定京津冀地区的外来入侵物种高风险来源国家,根据世界自然保护联盟(IUCN)公布的危险性入侵物种分布信息明确京津冀地区的潜在高风险外来入侵物种.结果显示,京津冀地区外来入侵物种高风险来源国家有5个,分别为美国、德国、俄罗斯、意大利和加拿大,其中,北京的外来入侵物种高风险来源国家为美国、德国和俄罗斯,天津的外来入侵物种高风险来源国家为美国、意大利和俄罗斯,河北的外来入侵物种高风险来源国家为美国和加拿大. 京津冀地区潜在高风险外来入侵物种有31种,其中潜在高风险入侵植物有人厌槐叶萍Salvinia molesta、米氏野牡丹Miconia calvescens等9种,潜在高风险入侵动物有大果柏大蚁Cinara cupressi、四斑按蚊Anopheles quadrimaculatus等22种.最终依据京津冀地区潜在高风险外来入侵物种的入侵途径和传播特点提出了针对性防控对策.关键词:京津冀地区;高风险外来入侵物种;防控对策中图分类号:Q967 文献标志码:A 文章编号:1000-1565(2024)01-0060-10Research on potential high-risk invasive alien species in the Beijing-Tianjin-Hebei regionLIU Zhiqi¹, CHEN Fengxin², SUN Yanan², ZHANG Fengjuan¹(1. College of Life Sciences, Hebei University, Baoding 071002, China;2. School of Economics, Hebei University, Baoding 071002, China)Abstract: In order to effectively improve the prevention and the ability of controlling invasive alien species in the Beijing-Tianjin-Hebei region and ensure regional biosecurity, the high-risk source countries of invasive alien species in the Beijing-Tianjin-Hebei region were determined based on the two major factors of climate environment and economic activities, and the potential high-risk invasive alien species in the Beijing-Tianjin-Hebei region were identified according to the distribution information of dangerous invasive species published by the International Union for Conservation of Nature. The results showed that there were 5 high-risk sources of invasive alien species in the Beijing-Tianjin-Hebei region, namely, the United States, Germany, Russia, Italy and Canada. Among them, the high-risk source countries of invasive alien species in Beijing were the United States, Germany and Russia, and the high-risk source countries of invasive alien species in Tianjin were the United States, Italy and Russia. The high-risk source countries of invasive alien species in Hebei are the United States and Canada. In total, there are 31 potential high-risk- 收稿日期:2023-03-14;修回日期:2023-06-07 基金项目:国家自然科学基金资助项目(31972343;32272562);国家重点研发项目(2022YFC2601004);河北省软科学研究专项(20557676D) 第一作者:刘志祺(1999—),男,河北大学在读硕士研究生,主要从事入侵生物学研究. E-mail:liuzhiqi2021@163.com 通信作者: 陈凤新(1966—),男,河北大学副教授,主要从事国际贸易研究.E-mail:fengxinchen@126.com第1期刘志祺等:京津冀地区潜在高风险外来入侵物种研究invasive alien species in the Beijing-Tianjin-Hebei region, including 9 potential high-risk invasive alien plants such as Salvinia molesta and Miconia calvescens, and 22 potential high-risk invasive alien animals such as Cinara cupressi and Anopheles quadrimaculatus. Ultimately, based on the invasion pathways and dissemination characteristics of potential high-risk invasive alien species in the Beijing-Tianjin-Hebei region, targeted prevention and control strategies are proposed.

A new record species of Scolytus Geoffroy (Curculionidae: Scolytinae), with a key to Chinese species

CAO Yufeng, YU Guangyu, LI Ting,LAI Shengchang, Hagus Tarno, WANG Jianguo

2024, 44(1):  70-76.  DOI: 10.3969/j.issn.1000-1565.2024.01.009

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A new record species of the genus Scolytus Geoffro, Scolytus pubescens Stark, collected from Shandong Province and Heilongjiang Province is reported for the first time, and descriptions and pictures of morphological characteristics, hosts and distributions are provided. According to the morphological characteristics of the genus, a key to Chinese species is given. The specimen materials are deposited in the Department of Plant Protection, School of Agricultural Sciences, Jiangxi Agricultural University.

Application of ceramic ultrafiltration membrane in the extraction of 5-hydroxy-L-tryptophan from fermentation broth

ZHANG Yijun, TIAN Junbo, YANG Zhibin, HAO Jinbo, HU Jianglin, LYU Zhitang

2024, 44(1):  77-83.  DOI: 10.3969/j.issn.1000-1565.2024.01.010

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In order to improve the extraction and separation efficiency of 5-hydroxy-L-tryptophan(5-HTP)and reduce energy consumption and pollution emission, ceramic ultrafiltration membrane was selected to extract 5-HTP from fermentation broth. Firstly, the suitable membrane pore size of 10 nm was selected, and then the three optimum process parameters for the separation and extraction of 5-HTP by ceramic ultrafiltration membrane were further optimized: pH value of fermentation solution is 3.5, transmembrane pressure is 0.75 MPa, and transmembrane temperature is 35 ℃. Under this process condition, the penetration ratio of 5-HTP is more than 92%, and the rejection ratio of free protein is more than 90%, which meets the requirements of further concentration and crystallization to prepare 5-HTP, and achieves- DOI:10.3969/j.issn.1000-1565.2024.01.010陶瓷超滤膜在5-羟基-L-色氨酸发酵产物提取中的应用张怡君¹,田俊波^2,3,杨志彬^2,3,郝晋博¹,胡江林^2,3,吕志堂¹(1.河北大学 生命科学学院,河北省微生物多样性研究与应用重点实验室,河北 保定 0710022.河北维达康生物科技有限公司 技术研发中心,河北 保定 072152;3.保定保利瑞合生物科技有限公司 技术研发中心,河北 保定 072152)摘 要:为提高5-羟基-L-色氨酸(5-hydroxy-L-tryptophan,5-HTP)提取分离效率,降低能耗和污染排放,选择陶瓷超滤膜应用于从发酵液中提取5-HTP的工艺,对陶瓷超滤膜的过滤条件进行优化.首先优选出适合的膜孔径为10 nm,进一步优化得到陶瓷超滤膜分离提取5-HTP的3个最优工艺参数:发酵液pH值3.5,跨膜压差0.75 MPa,料液过膜温度35 ℃.在此工艺条件下,5-HTP的透过率在92%以上,对游离蛋白质截留率达 90%以上,满足进一步浓缩、结晶制备5-HTP的要求,达到了优化预期效果,为陶瓷超滤膜应用于从发酵液中工业化提取5-HTP提供了可靠依据.关键词:陶瓷超滤膜;5-羟基-L-色氨酸;过滤条件;透过率;截留率中图分类号:Q81 文献标志码:A 文章编号:1000-1565(2024)01-0077-07Application of ceramic ultrafiltration membrane in the extraction of 5-hydroxy-L-tryptophan from fermentation brothZHANG Yijun¹, TIAN Junbo^2,3, YANG Zhibin^2,3, HAO Jinbo¹, HU Jianglin^2,3, LYU Zhitang¹(1. Key Laboratory of Microbial Diversity Research and Application of Hebei Province, College of Life Sciences, Hebei University,Baoding 071002, China;2. Technology Research and Development Center,Hebei VDK Natura Syn Co. Ltd., Baoding 072152, China;3. Technology Research and Development Center,Baoding BLRH Biotech Co. Ltd., Baoding 072152, China)Abstract: In order to improve the extraction and separation efficiency of 5-hydroxy-L-tryptophan(5-HTP)and reduce energy consumption and pollution emission, ceramic ultrafiltration membrane was selected to extract 5-HTP from fermentation broth. Firstly, the suitable membrane pore size of 10 nm was selected, and then the three optimum process parameters for the separation and extraction of 5-HTP by ceramic ultrafiltration membrane were further optimized: pH value of fermentation solution is 3.5, transmembrane pressure is 0.75 MPa, and transmembrane temperature is 35 ℃. Under this process condition, the penetration ratio of 5-HTP is more than 92%, and the rejection ratio of free protein is more than 90%, which meets the requirements of further concentration and crystallization to prepare 5-HTP, and achieves- 收稿日期:2023-08-28;修回日期:2023-09-06 基金项目:河北省重点研发计划项目(22372403D) 第一作者:张怡君(1996—),女,河北大学在读硕士研究生,主要从事微生物资源与系统学研究.E-mail: zyjdyx898@163.com 通信作者:吕志堂(1973—),男,河北大学教授,博士,主要从事微生物资源与系统学、微生物组学和合成生物学研究.E-mail: lzt325@hbu.edu.cn胡江林(1970—),男,研究员,主要从事制药工程、合成生物学研究.E-mail:hujianglin@vdkbio.com第1期张怡君等:陶瓷超滤膜在5-羟基-L-色氨酸发酵产物提取中的应用the expected effect of the optimization. It provides a reliable basis for the application of ceramic ultrafiltration membrane to industrial extraction of 5-HTP from fermentation broth.

Methods for determination of microplastics and their ecotoxicological effects on aquatic organisms

CUI Tiefeng, ZHANG Jie, LU Canran, WANG Hongwei, YE Ye

2024, 44(1):  84-91.  DOI: 10.3969/j.issn.1000-1565.2024.01.011

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The research progress of separation and analysis methods of Microplastics(MPs), including mechanical filtration, chemical treatment, colloidal coprecipitation, density gradient centrifugation and optical/fluorescence/Raman analysis, was reviewed. Their advantages, disadvantages and application range- DOI:10.3969/j.issn.1000-1565.2024.01.011微塑料的测定方法以及对水生生物的生态毒理效应崔铁峰^1,2,张杰¹,卢灿然¹,王宏伟¹,叶晔³(1.河北大学 生命科学学院 生命科学与绿色发展研究院,河北 保定 071002;2.华东师范大学 河口海岸科学研究院,河口海岸国家重点实验室,上海 200241;3.中日友好环境保护中心 科技中心,北京 100029)摘 要:综述了当前微塑料(microplastics, MPs)分离和分析方法的研究进展, 包括机械过滤、化学处理、胶体共沉淀、密度梯度离心和光学/荧光/拉曼分析等方法, 同时介绍了它们的优缺点和适用范围, 为微塑料污染的检测、监测和评估提供了参考.概述了MPs对水生生物的毒性效应:MPs在被水生生物摄入的过程中会对生物体的消化道造成物理损伤, 同时MPs的摄入会增加饱腹感, 影响水生生物对食物的消化吸收;MPs的摄入还会使水生生物肠道中的微生物群落组成和多样性发生改变;MPs暴露会引起水生生物基因的改变,还会诱发水生生物的氧化应激反应, 并干扰其脂质和能量代谢.MPs对消化系统的影响及对肠道微生物平衡的破坏可能是生物体脂质和能量代谢相关基因改变的原因之一.MPs可以吸附和富集其他物质, 从而对生物产生更严重的联合毒理效应.MPs对生物体消化道的物理损伤及其在生物体内的积累和扩散可能是引起氧化应激反应和免疫反应的主要原因.不仅对水生生物, MPs对人类的健康风险也引起人们对其潜在影响的关注.关键词:微塑料;水生生物;生态毒理效应中图分类号:Q89 文献标志码:A 文章编号:1000-1565(2024)01-0084-08Methods for determination of microplastics and their ecotoxicological effects on aquatic organismsCUI Tiefeng^{1, 2}, ZHANG Jie¹, LU Canran¹, WANG Hongwei¹, YE Ye³(1. Institute of Life Science and Green Development,College of Life Sciences,Hebei University,Baoding 071002,China;2. State Key Laboratory of Estuarine and Coastal Science, Institute of Estuarine and Coastal Sciences, East China Normal University, Shanghai 200241, China;3.Science and Technology Center,China-Japan Friendship and Environmental Protection Center, Beijing 100029, China)Abstract: The research progress of separation and analysis methods of Microplastics(MPs), including mechanical filtration, chemical treatment, colloidal coprecipitation, density gradient centrifugation and optical/fluorescence/Raman analysis, was reviewed. Their advantages, disadvantages and application range- 收稿日期:2022-11-01;修回日期:2023-08-14 基金项目:农业农村部项目(2130135);教育部留学回国基金资助项目(201808130270);河北省自然科学基金创新研究群体项目(C2022201042);河北省科技特派员项目(2022-2024) 第一作者:崔铁峰(1995—),男,河北大学硕士研究生,华东师范大学在读博士研究生,主要从事生态学研究.E-mail: 2413829127@qq.com 通信作者:王宏伟(1970—),女,河北大学教授,博士,主要从事水生生物环境监测与保护研究. E-mail: whw66668888@126.com叶晔(1980—),女,中日友好环境保护中心高级工程师,主要从事水生态健康评估研究.E-mail:ye200506@163.com第1期崔铁峰等:微塑料的测定方法以及对水生生物的生态毒理效应were also introduced, which provided a reference for the detection, monitoring and evaluation of microplastics pollution. The toxic effects of MPs on aquatic organisms were also reviewed: MPs could cause physical damage to the digestive tract of aquatic organisms during ingestion, while the ingestion of MPs could increase satiety and affect the digestion and absorption of food by aquatic organisms; the ingestion of MPs could also alter the composition and diversity of microbial communities in the gut of aquatic organisms; MPs exposure could cause genetic alterations in aquatic organisms. The effects of MPs on the digestive system and the disruption of gut microbial homeostasis may be one of the causes of genetic alterations related to lipid and energy metabolism in organisms; the physical damage to the digestive tract and the accumulation and spread of MPs in organisms may be the main cause of oxidative stress and immune responses. MPs could adsorb and enrich other substances, resulting in more severe combined toxicological effects on organisms.The physical damage to the digestive tract of organisms and their accumulation and spread in the organism may be the main cause of oxidative stress and immune response.

OpenCL acceleration algorithm of image median filtering based on heterogeneous platform

XIAO Shiyang, WANG Lei, DU Ying, XIAO Han

2024, 44(1):  92-103.  DOI: 10.3969/j.issn.1000-1565.2024.01.012

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Image noise reduces the signal-to-noise ratio and quality of image, and denoising is one of the important steps in image processing. In this paper, an image median filtering parallel fast denoising filtering algorithm based on Open Computing Language(OpenCL)is proposed. The architecture characteristics of OpenCL and median filtering processing flow are introduced. According to the concurrent structure characteristics of Graphics Processing Unit(GPU), the image median filtering function module is optimized in parallel, and the complexity of the algorithm is reduced. By fully activating the work-groups and work-items in the workspace to improve the efficiency of data access, optimize the configuration parameters of the kernel work-group, the parallel processing of the median filter is realized. The experimental results show that under the condition that the image quality remains unchanged, compared- DOI:10.3969/j.issn.1000-1565.2024.01.012基于异构平台的图像中值滤波的OpenCL加速算法肖诗洋¹,王镭²,杜莹³,肖汉²(1.东南大学 土木工程学院,江苏 南京 211189;2.郑州师范学院 信息科学与技术学院,河南 郑州 450044;3.郑州师范学院 地理与旅游学院,河南 郑州 450044)摘 要:图像噪声降低了图像信噪比和质量,去噪是图像处理工作的重要环节之一.本文提出了一种基于开放式计算语言(OpenCL)架构的图像中值滤波快速降噪并行算法.介绍了OpenCL体系结构特点和中值滤波处理流程.根据图形处理器(GPU)的并发结构特点,对图像中值滤波功能模块进行了并行优化,降低了算法复杂度.通过充分激活NDRange索引空间中的工作组和工作项来提高数据访问效率,优化内核工作组配置参数,实现了中值滤波器的并行处理.实验结果表明,在图像质量保持不变的情况下,与基于CPU的串行算法、基于开放多处理(OpenMP)并行算法和基于统一计算设备架构(CUDA)并行算法性能相比,图像中值滤波并行算法在OpenCL架构下NVIDIA GPU计算平台上分别获得了29.74、17.29、1.15倍的加速比.验证了算法的有效性和平台的可移植性,基本满足应用的实时性处理要求.关键词:中值滤波;椒盐噪声;图形处理器;开放式计算语言;并行算法中图分类号:TP311 文献标志码:A 文章编号:1000-1565(2024)01-0092-12OpenCL acceleration algorithm of image median filtering based on heterogeneous platformXIAO Shiyang¹, WANG Lei², DU Ying³, XIAO Han²(1. School of Civil Engineering, Southeast University, Nanjing 211189, China;2. School of Information Science and Technology, Zhengzhou Normal University, Zhengzhou 450044, China;3. School of Geography and Tourism, Zhengzhou Normal University, Zhengzhou 450044, China)Abstract: Image noise reduces the signal-to-noise ratio and quality of image, and denoising is one of the important steps in image processing. In this paper, an image median filtering parallel fast denoising filtering algorithm based on Open Computing Language(OpenCL)is proposed. The architecture characteristics of OpenCL and median filtering processing flow are introduced. According to the concurrent structure characteristics of Graphics Processing Unit(GPU), the image median filtering function module is optimized in parallel, and the complexity of the algorithm is reduced. By fully activating the work-groups and work-items in the workspace to improve the efficiency of data access, optimize the configuration parameters of the kernel work-group, the parallel processing of the median filter is realized. The experimental results show that under the condition that the image quality remains unchanged, compared- 收稿日期:2022-09-28;修回日期:2023-02-11 基金项目:国家自然科学基金资助项目(61250007;61572444);河南省高等学校重点科研项目(22A520049) 第一作者:肖诗洋(2000—),男,东南大学在读硕士研究生.E-mail: xsytt626@163.com 通信作者:肖汉(1970—),男,郑州师范学院教授,主要从事并行算法研究与设计、图像并行处理方向研究.E-mail: xiaohan70@163.com第1期肖诗洋等:基于异构平台的图像中值滤波的OpenCL加速算法with the serial algorithm based on CPU, the parallel algorithm based on Open Multi-Processing(OpenMP)and the parallel algorithm based on Compute Unified Device Architecture(CUDA), the parallel algorithm of image median filtering achieves 29.74 times, 17.29 times and 1.15 times acceleration ratio on the NVIDIA GPU computing platform based on OpenCL architecture, respectively. The effectiveness of the algorithm and the portability of the platform are verified, and the real-time processing requirements of the application are basically met.

Leader-follower consensus of mixed-order heterogeneous multi-agent systems

GAO Linqing, WANG Chao, HA Dengzhe, GENG Hua, HOU Shuai

2024, 44(1):  104-112.  DOI: 10.3969/j.issn.1000-1565.2024.01.013

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The mixed-order heterogeneous multi-agent systems are composed of a static leader and a first-order, second-order and third-order integrator follower. Firstly, under the condition of undirected and directed communication networks, the consistency protocols are proposed by using the method of designing linear filters. Secondly, the feasibility of the protocol is proved based on Lyapunov direct method, Russell invariant set principle and matrix theory. Finally, the validity of the conclusions is verified by two simulation examples.