基于国有企业经营者视角的激励机制解释     

王再文  应宏峰 《太原理工大学高等教育研究》2005,23(3):67-69

一方面,由我国市场发育的特点决定,国有企业经营者承担的职能更加复杂,对企业的生存发展也更为重要;另一方面,由多层委托-代理关系决定,国有企业的代理成本过高,国有企业经营者对企业所有者利益损害的可能性较大.尽快建立、完善对企业经营者的激励机制是国有企业及其所有者的现实选择.科学的经营者激励机制应体现两个特征：（1）按劳取酬;（2）有效竞争.  相似文献   

GaNAs和GaAsSb半导体的光学性质研究（英文）     

罗向东  徐仲英 《中国科学院研究生院学报》2005,1(5):645-655

首次利用材料在超短脉冲激发下的瞬间高载流子密度特性研究了GaNxAs1-x/GaAs量子阱的光学特性。研究首次发现在高于量子阱的Mott迁移边(局域发光的高能端)存在一个非局域特性的新的发光峰。该峰具有与局域发光完全不同的光学性质。通过研究材料的不同温度和激发强度下的发光行为证实该新的发光峰是量子阱的本征能级发光。这一结果为目前人们在Ga(In)NAs材料体系中是否存在Ga(In)NAs合金态或者N是以杂质带的形式存在的争论提供了重要证据。在Ga(In)NAs以及InGaN等材料体系中都观察到PL发光峰随温度升高先红移，然后蓝移，再红移的所谓的“S”形变化。它的来源一直令人们疑惑不解。我们直接证明GaNxAs1-x材料中发光峰的“S”形变化是由于材料中的低能端的局域态随温度的淬灭以及相邻的局域态与非局域态之间在温度的作用下相互竞争的结果。这一结果为能量随温度的“S”形变化提供了最直接的实验证据。通过光荧光谱, 时间分辨光谱研究了低N含量的GaNxAs1-x光学性质。首次发现在低N含量的GaNxAs1-x材料(N%<1%)中，在N的杂质态的高能端(低于GaAs带边)存在一个新的，其光学性质与N的杂质态完全不同的发光峰。实验证明该峰是GaNxAs1-x材料的合金态。这一结果说明在GaNxAs1-x中即便在N含量<0.1%时就已经形成了GaNxAs1-x的合金态。这个结果的重要意义在于它直接证明N在GaAs中能够形成GaNxAs1-x合金，而不是仅仅以N的杂质态存在。这为目前人们所争论的N在GaAs所起的作用，GaNxAs1-x光跃迁的来源，以及Ga(In)NAs的基本能带结构提供了直接的实验证据。最后我们利用选择激发在GaAs1-xSbx/GaAs量子阱中实验上第一次同时观察到空间直接（Type-I）跃迁和间接跃迁(Type-II)。时间分辨荧光寿命谱进一步直接论证了GaAs1-xSbx/GaAs能带排列的Type-II特性。  相似文献   

国华定洲励磁系统改造     

陆巍  许其质 《大众科技》2016,(7):60-62

文章介绍了国华定洲电厂1#发电机励磁系统改造的有关内容,介绍新改造的励磁系统技术特点、现场动态试验情况。  相似文献   

Putting the “Is for” Back into the Study of Cognition and Behavior: Commentary on “Unifying Themes for Educational Psychology”     

Gary D. Phye 《Educational Psychology Review》1999,11(2):117-127

Understanding human behavior situated in a classroom context has traditionally been the domain of educational psychology. This rich tradition continues today, but in a fragmented manner. This fragmentation is undoubtedly the result of a number of factors, but two contributing factors that come readily to mind are (a) the demise of grand theories and (b) the increase in multidisciplinary research efforts. In some respects, the former may be a function of the latter. Regardless, multidisciplinary efforts will continue to increase simply due to the complexity of the problems we are addressing. However, the major significance of the Dempster and Corkill paper is the call for unifying themes couched within a biological system that focuses on personal knowledge construction through the process of learning. In many respects this is a clarion call for a reconsideration of the theoretical roots of functionalism from which educational psychology sprang.  相似文献   

海岛农村教师发展激励机制的思考     

项春华 《湖北广播电视大学学报》2009,29(3):91-93

海岛农村教师发展的主要途径是加强教师继续教育,基础是建立保障机制,而动力是确立行之有效的激励机制。如何确定行之有效的教师激励机制,本文从对现有海岛农村教师激励政策的反思和具体的典型案例分析来探讨这一问题。  相似文献   

Seismic response analysis of long-span suspen-dome under multi-support excitations     

陈志华  乔文涛  王小盾 《天津大学学报(英文版)》2010,16(6):424-432

A practical suspen-dome project, Changzhou Gym roof, is adopted as an example and its transient analysis based on the multi-support excitations of the earthquake wave is carried out. Compared with the single support excitation, the position and value of the maximum stress under multi-support excitations both change and the amount of elements with obvious changes is large and more than 70% of the total. Moreover, when other terms are not changed, this influence will decrease as the span decreases, but increa...  相似文献   

福建丰源水电厂励磁系统参数辨识探讨     

林建新  陈冲  温步瀛 《福建工程学院学报》2010,8(1)

为电网分析、计算提供准确的BPA标准发电机励磁系统模型参数,文章在Matlab环境下建立发电机励磁系统标准模型,以现场试验数据为基础,对模型参数进行辨识并确定其模型参数。随后,通过BPA软件进行空载阶跃响应校核以及负载阶跃响应校核,结果与现场实测波形基本一致,从而认为辨识得到的BPA标准模型参数是正确和有效的。  相似文献   

Cyclic electron flow around photosystem I is required for adaptation to high temperature in a subtropical forest tree, Ficus concinna   总被引：1，自引：0，他引：1  

Song-heng Jin  Xue-qin Li  Jun-yan Hu  Jun-gang Wang 《Journal of Zhejiang University. Science. B》2009,10(10):784-790

Dissipation mechanisms of excess photon energy under high-temperature stress were studied in a subtropical forest tree seedling, Ficus concinna. Net CO2 assimilation rate decreased to 16% of the control after 20 of high-temperature stress, and thus the absorption of photon energy exceeded the energy required for CO2 assimilation. The efficiency of excitation energy capture by open photosystem Ⅱ (PSII) reaction centres (Fv'/Fm') at moderate irradiauce, photochemical quenching (qp), and the quantum yield of PSII electron transport (φPSII) were significantly lower after high-temperature stress. Nevertheless, non-photochemical quenching (qHP) and energy-dependent quenching (qE) were significantly higher under such conditions. The post-irradiation transient of chlorophyll (Chl) fluorescence significantly increased after the turnoff of the actinic light (AL), and this increase was considerably higher in the 39 ℃-grown seedlings than in the 30 ℃-grown ones. The increased post-irradiation fluorescence points to enhanced cyclic electron transport around PSI under high growth temperature conditions, thus helping to dissipate excess photon energy non-radiatively.  相似文献   

试论高校岗位绩效考核的人性化激励   总被引：2，自引：0，他引：2  

陈水生 《韩山师范学院学报》2007,28(4):77-80

岗位绩效考核是岗位聘任的关键,岗位绩效考核标准和岗位职责要点的制定是考核工作的重点与难点,考核的标准是刚性的,考核可以更人性化,在制定岗位职责要点、实施岗位绩效考核的过程中,推进岗位绩效人性化激励,对构建和谐高校将有积极的现实意义。  相似文献   

Transient response of piles-bridge under horizontal excitation     

朱斌  陈仁朋  陈云敏 《浙江大学学报(A卷英文版)》2003,4(1):28-34

Moving ships and other objects drifting on water often impact a bridge's pile foundation. The mechanical model of the piles-bridge structure under horizontal forcing was established, and a time-domain approach based on Finite-difference Method was developed for analyzing the dynamic response of the piles-bridge structure. For a single pile, good agreement between two computed results validated the present approach. The slenderness ratio of the pile, the pile-soil stiffness ratio and the type of the structure influence the dynamic response of the piles-bridge structure. The computed results showed that the stiffness of the structure determines the dynamic response of the piles-bridge structure under horizontal forcing. Project (No. 001110442) supported by the Science and Technology Bureau of Zhejiang Province, China.  相似文献