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Industry Distribution Characteristics of Benzene-ExposedWorkers with Cytopenia - Four Provinces, China, 2020

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China CDC weekly 2022年第51期4卷 1143-1147页

作者： Dongning Hua Xue Wang Lei Han Jin zhou Xiurong Cheng Boshen Wang Juan Zhang Jinzhe Li Peiyu Xu Shang Gao lifang zhou Fei Li Xinglin Fang Jin Li Zihuan Wang Jing Liu Jie Ren Baoli Zhu Meibian Zhang Caihong Xing Key Laboratory of Chemical Safety and Health National Institute for Occupational Health and Poison ControlChinese Center for Disease Control and PreventionBeijing MunicipalityChina Jiangsu Provincial Center for Disease Control and Prevention Nanjing CityJiangsu ProvinceChina Key Laboratory of Environmental Medicine Engineering of Ministry of Education School of Public HealthSoutheast UniversityNanjing CityJiangsu ProvinceChina Department of Nutrition Food Safety and ToxicologyWest China School of Public HealthSichuan UniversityChengdu CitySichuan ProvinceChina Occupational and Radiation Health Institute Sichuan Center for Disease Control and PreventionChengdu CitySichuan ProvinceChina Zhejiang Provincial Center for Disease Control and Prevention HangzhouZhejiangChina Fujian Center for Prevention and Control of Occupational Diseases and Chemical Poisoning Fuzhou CityFujian ProvinceChina Beijing Center for Disease Prevention and Control Beijing Research Center for Preventive MedicineBeijing MunicipalityChina Tianjin Centers for Disease Control and Prevention Tianjin MunicipalityChina.

What is already known about this topic?Benzene is harmful to the hematopoietic system and can cause ***,benzene is still being used in various industries including furniture,rubber,plastic products,and metal product *** is added by this report?The white blood cell count of workers in general equipment,special equipment,chemical raw materials,and chemical products manufacturing decreased *** enterprises in which benzene concentration exceeded the occupational exposure limit were small enterprises and private *** are the implications for public health practice?Regular health examinations are necessary for benzeneexposed *** addition,the monitoring of benzene concentration in small enterprises and private enterprises should be strengthened.

关键词： enterprises rubber strengthened

改进k-means聚类算法多模型建模的一种新的评价函数

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化工学报 2007年第8期58卷 2051-2055页

作者：周立芳周芦文赵豫红浙江大学信息学院控制系工业控制研究所浙江杭州310027

The modeling and control of pH neutralization processes is a difficult problem in the field of process control.A multi-modeling method using an improved k-means clustering based on a new validity function is proposed in this *** are some common problems, including the number of clusters assumed as a priori knowledge and initial cluster centers selected randomly for classical k-means *** proposed algorithm is used to compute initial cluster centers and a new validity function is added to determine the appropriate number of clusters, then partial least squares (PLS) is used to construct the regression equation for each local *** results showed that multiple models using the proposed algorithm gave good performance, and the feasibility and validity of the proposed algorithm was verified.

关键词： k-means聚类性能评价函数 pH中和过程偏最小二乘算法

Mixed-Weights Least-Squares Stable Predictive Control Algorithm with Soft and Hard Constraints

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Chinese Journal of Chemical Engineering 2003年第5期11卷 565-570页

作者：周立芳邵之江 Institute of Systems Engineering Control Science and Engineering Department Zhejiang University Hangzhou 310027 China

Mixed-weight least-squares (MWLS) predictive control algorithm, compared with quadratic programming (QP) method, has the advantages of reducing the computer burden, quick calculation speed and dealing with the case in which the optimization is infeasible. But it can only deal with soft constraints. In order to deal with hard constraints and guarantee feasibility, an improved algorithm is proposed by recalculating the setpoint according to the hard constraints before calculating the manipulated variable and MWLS algorithm is used to satisfy the requirement of soft constraints for the system with the input constraints and output constraints. The algorithm can not only guarantee stability of the system and zero steady state error, but also satisfy the hard constraints of input and output variables. The simulation results show the improved algorithm is feasible and effective.

关键词： mixed-weight least-squares predictive control soft constraints hard constraints feasibility

高层黏滞阻尼减震结构最小地震剪力系数分析研究

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地震工程与工程振动 2013年第6期33卷 206-214页

作者：周丽芳邓雪松周云广州大学土木工程学院广东广州510006

采用ETABS软件对高层钢框架-混凝土核心筒黏滞阻尼减震结构进行多遇地震作用下的时程反应分析,研究了不同阻尼力比和不同高度结构的减震性能,通过与规范反应谱值对比,探讨了消能减震结构剪重比降低的可行性。以一工程为例,采用PERFORM-3... 详细信息

采用ETABS软件对高层钢框架-混凝土核心筒黏滞阻尼减震结构进行多遇地震作用下的时程反应分析,研究了不同阻尼力比和不同高度结构的减震性能,通过与规范反应谱值对比,探讨了消能减震结构剪重比降低的可行性。以一工程为例,采用PERFORM-3D软件分析了结构在罕遇地震作用下的减震性能。研究结果表明:黏滞阻尼减震结构可对建筑物在地震作用中的反应进行有效控制,提高了结构的安全性能,但是同时会使结构的楼层剪力减小,使结构的剪重比达不到规范的要求,但其安全性能比规范要求提高更多;阻尼力比r至少为0.1时,才能降低减震结构的剪重比限值的要求。

关键词：地震剪力系数阻尼力比消能减震黏滞阻尼器地震反应

The Study of Predictive Control System Based on Coincidence Points Technology

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The Study of Predictive Control System Based on Coincidence ...

2009中国控制与决策会议

作者： Nana Zhu,lifang zhou Department of Control Science and Engineering,Zhejiang University,Hangzhou 310027

＜正＞Predictive control is actually widely used for industrial process control.A big number of points in the predictive horizon and control horizon are often chosen not only to ensure the quality of the dynamic process for slow processes but also to get a better robustness for the control *** it will raise the computational effort of the *** and coincidence points technology can reduce the computation time while keeping the length of the horizon,which consider a reduced number of points in the predictive horizon（coincidence points） as well as in the control horizon（blocking point）.Base on step response,a new method of selecting coincidence points is proposed in this *** simulation results show that this method could not only achieve the objective of simplifying the calculation,but also have certain advantages in the fast performance and ***,this method is simpler and more practical.

关键词： slow process predictive control blocking technique coincidence points

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“伟大历史主动精神”诠释唯物史观基本原理

新视野 2022年第4期 47-52页

作者：周利方沈全上海师范大学旅游学院/上海旅游高等专科学校上海市201418 上海商学院马克思主义学院上海市200235

“伟大历史主动精神”是中国共产党精神品格的重要内容,体现了中国共产党自觉能动地改造社会历史的精神状态,是党带领全国人民取得伟大成就的精神内涵的高度凝练概括。中国共产党从诞生那天起就以强烈的历史责任感,主动承担起历史赋予... 详细信息

“伟大历史主动精神”是中国共产党精神品格的重要内容,体现了中国共产党自觉能动地改造社会历史的精神状态,是党带领全国人民取得伟大成就的精神内涵的高度凝练概括。中国共产党从诞生那天起就以强烈的历史责任感,主动承担起历史赋予的伟大使命,以“伟大的历史主动精神”高扬主体性、发挥能动性,在正确把握社会历史规律和世情国情基础上,深入分析和准确把握中国革命、建设和改革的规律性,不断推动党和国家事业取得历史性成就、发生历史性变革。“历史主动精神”生动诠释了历史主体性的形成,自觉能动性的发挥以及人的合目的性实践创造等唯物史观基本原理。

关键词： “历史主动精神” 主体性唯物史观合目的性

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生物结皮发育对地表蒸发过程影响机理研究

干旱区资源与环境 2011年第4期25卷 193-200页

作者：周丽芳阿拉木萨中国科学院沈阳应用生态研究所沈阳110016 中国科学院研究生院北京100039

生物结皮的形成与发育显著改变了土壤地表特征及下伏土壤性质,对地表蒸发过程产生深远影响。但目前已有研究对生物结皮在地表蒸发过程中的作用仍存在很大争议。文中通过覆盖结皮和模拟降水的方法对土壤蒸发过程进行研究,以期初步揭示生... 详细信息

生物结皮的形成与发育显著改变了土壤地表特征及下伏土壤性质,对地表蒸发过程产生深远影响。但目前已有研究对生物结皮在地表蒸发过程中的作用仍存在很大争议。文中通过覆盖结皮和模拟降水的方法对土壤蒸发过程进行研究,以期初步揭示生物结皮发育影响地表蒸发过程的机理。结果表明:生物结皮主要通过结皮层对降水的截留和阻碍扩散作用及对下伏土壤性质的改变来影响土壤蒸发。生物结皮层主要体现为抑制蒸发,但生物结皮对下伏土壤性质的改变促进蒸发。生物结皮发育对地表蒸发的影响以抑制作用为主。生物结皮随着发育程度的提高,由抑制蒸发渐转为促进蒸发。

关键词：生物结皮地表蒸发影响机理

Multivariable Model Predictive Control for Integrating Processes with Input Constraints

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Multivariable Model Predictive Control for Integrating Proce...

A Novel Supervised Multi-model Modeling Method Based on k-means Clustering

2009中国控制与决策会议

作者： Nana Zhu,lifang zhou,Jianfeng Li Department of Control Science and Engineering,Zhejiang University,Hangzhou 310027

＜正＞The model predictive control（MPC） strategy with input constraints may lead to infeasibility of the control algorithm in short term and degradation of the control *** the control of integrating processes,the system input constraints will be possible to come into conflict with the constraints caused by zeroing the integrating modes of the system at the end of the control *** order to deal with this problem and increase the feasibility,the effect of setpoint on feasibility is studied for multivariable model predictive control of integrating processes in this *** improved algorithm is proposed by recalculating the setpoints according to the hard constraints before calculating the manipulated *** simulation results verify the efficiency and feasibility.

关键词： Model predictive control Integrating processes Input constraints

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A Novel Supervised Multi-model Modeling Method Based on k-me...