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董事长、总经理和公司法定代表人结构设计——基于国有独资公司董事会试点的实践

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华东经济管理 2010年第8期24卷 146-150页

作者：李靠队孔玉生江苏大学财经学院江苏镇江212013

董事会改革是国企改革的重要组成部分,国资委推进董事会试点,打破了旧的管理体制,实现了所有权、决策权和经营权的分开,为国有企业的发展提供了体制保障,董事长、总经理和公司法定代表人结构是国有企业改革的核心。文章对董事长、总经... 详细信息

董事会改革是国企改革的重要组成部分,国资委推进董事会试点,打破了旧的管理体制,实现了所有权、决策权和经营权的分开,为国有企业的发展提供了体制保障,董事长、总经理和公司法定代表人结构是国有企业改革的核心。文章对董事长、总经理和公司法定代表人三者的结构进行了剖析和设计,运用排列组合和逻辑排除的方法,从概念、法律框架层次筛选出具有合理性的结构模式,推荐了十种较理想的结构并进行了详细的利弊分析。

关键词：董事长总经理法定代表人结构

高绩效工作系统与企业绩效——中国金融业的实证研究

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北京理工大学学报（社会科学版） 2010年第5期12卷 39-43页

作者：赵延昇赵有靠中国科学技术大学管理学院合肥230026

为了检验在中国背景下,高绩效工作系统与企业绩效的关系,通过问卷调查,收集了长三角地区的96家金融企业的人力资源管理实践和企业绩效的数据,并利用相关分析和回归分析的方法对数据进行分析研究。结果表明:高绩效工作系统对金融企业的... 详细信息

为了检验在中国背景下,高绩效工作系统与企业绩效的关系,通过问卷调查,收集了长三角地区的96家金融企业的人力资源管理实践和企业绩效的数据,并利用相关分析和回归分析的方法对数据进行分析研究。结果表明:高绩效工作系统对金融企业的非财务绩效指标具有正向的影响。

关键词：高绩效工作系统企业绩效金融业

Serotonergic modulation of axonal Ion channels and action potential conduction

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Serotonergic modulation of axonal Ion channels and action po...

中国神经科学学会第十届全国学术会议

作者： Lu-Ping YIN Wen-Qin HU Yong-Hong WANG Min-po YANG You-sheng SHU Institute of Neuroscience and State Key laboratory of Neuroscience Chinese Academy of Sciences

Objective It has been puzzled us for a long time about the exact location of 5-HT1a receptors(5-HT1aR).To reveal the location and function of this receptor,we added 5-HT in bath and found cells had three distinct responses in membrane potential change:inhibition,excitation and inhibition followed by excitation,which was due to the activation of 5-HT1aR,5-HT2aR *** addition,there was only excitatory response in 5-HT1aR KO *** the presence of 5-HT2aR antagonist,we puffed 5-HT on L5PC in different location and found that only in AIS there was great inhibition on action potential generation,which was partially by inactivation of sodium channels *** We puffed 5-HT on different location of neuron in the presence of 5-HT2aR *** Only in the axon initial segment(AIS),could action potential be *** Together,these results indicated mat(1) 5-HT1aR located in AIS specifically.(2) Modulation of AIS Na channels by 5-HT1A receptor may gate the action potential propagation to the soma.

关键词： 5-HT 5-HT1aR action potential sodium channel axon initial segment

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基于灰色关联模型的输电线路舞动预警方法

电力自动化设备 2018年第2期38卷 117-122页

作者：胡钋徐则诚金哲王可程绳尹洪武汉大学电气工程学院湖北武汉430072 国网湖北省电力公司检修公司湖北武汉430050

中国是世界上架空输电线路覆冰舞动最严重的国家之一。近年来输电线路舞动跳闸呈现出频率高、影响范围大的特点。提出了一种基于灰色关联模型的输电线路舞动预警方法,根据舞动故障发生的主要原因,建立指标体系,并根据各指标的影响程度... 详细信息

中国是世界上架空输电线路覆冰舞动最严重的国家之一。近年来输电线路舞动跳闸呈现出频率高、影响范围大的特点。提出了一种基于灰色关联模型的输电线路舞动预警方法,根据舞动故障发生的主要原因,建立指标体系,并根据各指标的影响程度采用层次分析法对各个指标分别赋以权重。据此再利用灰色关联理论将当前数据与参考数据进行关联度分析,从而计算当前线路发生舞动故障的危险指数,对故障发生的可能性进行预测。检修人员可以基于预测结果选择相应的巡检策略,从而做到有针对性地预防舞动故障,提高巡检效率,进一步减小输电线路舞动带来的危害。

关键词：输电线舞动预警灰色关联理论层次分析法

Dependence Tree Structure Estimation via Copula

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International Journal of Automation and computing 2012年第2期9卷 113-121页

作者： Jian Ma Zeng-Qi Sun sheng Chen Hong-Hai Liu Department of Computer Science Tsinghua University Beijing 100084 PRC Electronics and Computer Science Faculty of Physical and Applied Sciences University of Southampton Southampton SO17 1B J UK Faculty of Engineering King Abdulaziz University Jeddah 21589 Saudi Arabia Intelligent Systems and Robotics Research Group School of Creative Technologies University of Portsmouth Portsmouth PO1 2D J UK

We propose an approach for dependence tree structure learning via copula. A nonparametric algorithm for copula estimation is presented. Then a Chow-Liu like method based on dependence measure via copula is proposed to estimate maximum spanning bivariate copula associated with bivariate dependence relations. The main advantage of the approach is that learning with empirical copula focuses on dependence relations among random variables, without the need to know the properties of individual variables as well as without the requirement to specify parametric family of entire underlying distribution for individual variables. Experiments on two real-application data sets show the effectiveness of the proposed method.

关键词： Copula empirical copula dependence tree structure learning probability distribution.

Growth and Major Nutrient Concentrations in Brassica campestris Supplied with Different NH4^＋/NO3 Ratios

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Journal of Integrative Plant Biology 2007年第4期49卷 455-462页

作者： Fu-Cang Zhang Shao-Zhong Kang Fu-sheng Li Jian-Hua Zhang Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education Northwest A & F University Yangling 712100 China College of Water Resources and Civil Engineering China Agricultural University Beijing 100083 China College of Agriculture Guangxi University Nanning 530005 China Department of Biology Hong Kong Baptist University Hong Kong SAR China

In the present study, we investigated whether growth and main nutrient ion concentrations of cabbage （Brassica campestris L.） could be increased when plants were subjected to different NH4^＋/NO3- ratios. Cabbage seedlings were grown in a greenhouse in nutrient solutions with five NH4^＋/NO3- ratios （1：0; 0.75：0.25; 0.5：0.5; 0.25：0.75; and 0：1）. The results showed that cabbage growth was reduced by 87% when the proportion of NH4^＋-N in the nutrient solution was more than 75% compared with a ratio NH4^＋/NO3- of 0.5：0.5 35 d after transplanting, suggesting a possible toxicity due to the accumulation of a large amount of free ammonia in the leaves. When the NH4＋/NO3- ratio was 0.5：0.5, fresh seedling weight, root length, and H2po4- （P）, K^＋, Ca^2＋, and Mg^2＋ concentrations were all higher than those in plants grown under other NH4^＋/NO3- ratios. The nitrate concentration in the leaves was the lowest in plants grown at 0.5： 0.5 NH4^＋/NO3-. The present results indicate that an appropriate NH4^＋/NO3- ratio improves the absorption of other nutrients and maintains a suitable proportion of N assimilation and storage that should benefit plant growth and the quality of cabbage as a vegetable.

关键词： cabbage (Brassica campestris), N nutrition NH4^+/NO3- ratio plant growth plant nutrition.

Measurement of light polarization characteristics from an oil-polluted soil surface in near-infrared bands

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Chinese Science Bulletin 2009年第9期54卷 1607-1612页

作者： WANG Yuan sheng LianXi LI Ke ZHAO NaiZhuo ZHAO Yunsheng College of Urban and Environmental Sciences Northeast Normal University Changchun 130024 China State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration Northeast Normal Univesity Changchun 130024 China School of Municipal and Environmental Engineering Jilin Institute of Architecture and Civil Engineering Changchun 130021 China

Oil pollution can be monitored by infrared remote sensing technology. In this work, the degree of po-larization (DOP) was established as a quantitative index of oil pollution. The crude oil and the local typical surface soil from the Songyuan oil field in Jilin province were collected. Some soil samples with four levels of oil content and three levels of water content were prepared and measured. The DOP of the polluted soil and the clean soil in the field was also measured at 180° relative viewing azimuth angle, and 10°, 30° and 50° viewing zenith angles. It was found that with rising soil oil content, the DOP of the reflected light on the soil surface increased when the soil water content was low, and decreased when the soil water content was high.

关键词：土壤表面石油污染近红外波段光偏振特性测量土壤水分含量红外遥感技术定量指标

Effect of nanocomposite as pour point depressant on the cold flow properties and crystallization behavior of diesel fuel

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Chinese Chemical Letters 2022年第5期33卷 2677-2680页

作者： Yuan Xue Fengfei Chen Bin Sun Hualin Lin Bin Dai sheng Han School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai 201418China School of Chemistry and Chemical Engineering Shihezi UniversityShihezi 832003China School of Materials Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China

The high effective nano-hybrid pour point depressant(PPD)has attracted extensive attention for its po-tential application in improving the cold flow properties of diesel *** this paper,the nano-hybrid PPD was prepared by melt-blending method using three different alkyl chain lengths(i.e.,tetradecyl,hexade-cyl,and octodecyl)of n-alkyl methacrylate-maleic anhydride copolymers(R 1 MC-MA,R 1=C_(14),C_(16),C_(18))and SiO_(2)*** effect of those nano-hybrid PPDs on the cold filter plugging point(CFPP)and solidifying point(SP)depressing of diesel fuel were *** indicated that nano-hybrid PPD showed much better performance on diesel *** diesel fuel treated with 0.2 wt%C_(14)MC-MA/SiO_(2)nano-hybrid PPD exhibited the best depression in CFPP and SP by 6℃ and 18℃,respectively,which higher than that of single C 14 ***-temperature curves and polarized optical microscopy were conducted to explore the performance mechanism;and results presented that nano-hybrid PPD of C_(14)MC-MA/SiO_(2)could effectively lower the low-temperature viscosity,and modify the crystallization behavior and crystal morphology of ***,the cold flow properties of diesel were significantly improved.

关键词： Diesel fuel pour point depressant Nano-hybrid Cold flow properties Crystallization behavior

GRIP1956T phosphorylation regulates myosin Vl-mediated Trip6 local targeting and dendrite development

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GRIP1956T phosphorylation regulates myosin Vl-mediated Trip6...