中高锰钢耐磨堆焊层的自强化机理

针对高锰钢堆焊可焊性差的问题,利用接触疲劳试验分析了Mn元素在Fe-Mn合金中的作用。阐述了中高锰钢耐磨堆焊层的自强化机理。高锰钢的自强化以加工硬化为主,而中锰钢的自强化以应变诱发马氏体相变强化为主。这种特殊的强化机制能够显著提高堆焊层的使用寿命。通过相变热力学分析,对获得中锰钢堆焊层成分的方法进行了设计。利用动载磨料磨损试验验证了中高锰钢的自强化机理。

组织公民行为的保持和自强化机制研究——基于社会嵌入的视角

组织公民行为体现的是员工的合作意愿,与组织绩效密切相关,因此保持并强化组织公民行为显得异常重要,社会嵌入观点为组织公民行为的保持和强化提供了分析视角,组织公民行为不仅受积极组织背景特征的影响,在行为实施过程也会产生有利于组织公民行为持续和强化的因素。

企业财务制度效率自强化机制的实验研究

文章通过实验研究,观察不同的企业财务制度效率自强化机制实施模式下,自强化机制对环境影响因素的扰动的自适应能力,以及在自强化机制作用下,领导行为和员工的组织认同对财务制度效率的作用效果。实验研究发现:不同的企业财务制度效率自强化机制实施模式下,自强化机制对环境影响因素的扰动具有自适应能力;变革导向领导行为和关系导向领导行为通过提高组织学习能力,正向影响自强化机制的作用效果;员工的组织认同程度、知识分享意愿与工作能力在自强化机制作用下,有效地促进了企业财务制度效率的提高。文章的发现为企业应用财务制度效率自强化机制提供了有益帮助。

双向自强化堆焊技术应用

双相自强化堆焊焊条和高硬度耐磨堆焊焊条的基础上通过实践发展起的新技术,经长期使用证明其耐磨性是其它产品的2一7倍。堆焊是修复易磨损零件的常用工艺手段。

空心村滞后发展的自强化机制及其破解路径——自生发展能力视角的解读

近年来,农村空心化现象在全国各地已普发态势,构成了城乡均衡发展的严重阻碍。与此同时,由于自生发展能力不断减弱,使得空心村滞后发展过程表现出了明显的自强化特征,空心村问题因此更显复杂化和严峻化。有鉴于此,只有将外部干预同内部自发行动有机结合起来,从根本上加快培育空心村自生发展能力,才能在全局上破除自我强化机制对空心村转型发展的低端"锁定"。

基于自强化功能的认知模型研究与人才培养

把握人的认知规律,对人才的培养具有重要意义。基于生物学和生命科学的研究成果,从细胞进化的角度揭示认知功能部位存在的自强化功能;根据不同阶段个体的认知特点建立认知模型,用自强化理论对相应的认知特点进行科学解释,提出了与之对应的人才培养策略;对各阶段的认知特点进行简要的概括比较,从而实现生物学、生命科学、认知理论和教育科学的统一。

美国萨班斯法案与中国企业内部控制制度自强化机制的构想

文章运用信息不对称理论和机制设计理论,分析美国萨班斯法案的建构逻辑与执行偏差,并通过大量文献的研究结果加以佐证。随后从制度文化、制度设计和执行机制三个方面,指出目前我国企业内部控制制度执行力方面存在的问题及自强化机制建设的构想。

多孔板结冰自强化效应对水升华器性能的影响

水升华器是一种利用水作为消耗性介质的相变散热装置,在航天器热控及生保系统中得到了广泛应用。在水升华器启动及运行过程中多孔板内部发生的结冰膨胀现象会对多孔板微观结构进行再加工;由于形变硬化效应,水升华器多次工作后,多孔板的塑性将逐渐降低,结构参数将逐渐固化,将这一过程定义为多孔板的自强化。而多孔板微观结构的变化,将对水升华器防击穿能力、稳态散热功率等宏观性能产生影响。在对水升华器工作机理进行分析的基础上,从微观角度定性研究了水升华器多孔板的结冰自强化机理,并针对自强化效应对水升华器宏观性能的影响开展了实验研究。结果表明:对于本文结构的水升华器,在同一条件下,稳态散热功率随着启动次数的增加而减小,且每次减小的幅度逐渐降低,在启动3~4次后稳态散热功率逐渐趋于稳定。由实验数据得到了水升华器稳态散热功率与启动次数之间的拟合关系式;渗透率越大的多孔板,水升华器工作过程对多孔板的再加工程度更大,因而自强化效果更明显;自强化效应还可以提高水升华器的防击穿能力。研究结果为探月三期工程嫦娥五号探测器提供了一定的设计依据。

企业财务制度自强化的CMVP发现平台——来自万达长白山管理公司的经验

本文以万达长白山国际度假区管理公司为研究对象,分析其财务制度自强化的发现平台运行机理及实现条件。研究发现,公司财务制度自动运行、自我加强关键在于领导放权、责任下沉、制度落地;在于制度开放和发现分享;在于公开透明、公平公正的奖惩机制;在于公司倡导的信任文化。

H公司薪酬激励制度效率自强化的最佳实践

本文归纳分析了H公司薪酬激励制度落地的动力机制、活力机制和压力机制。研究发现,薪酬制度效率自强化机制设计应注重引导员工朝企业业绩导向的方向发力,薪酬制度效率自强化是制度与机制合力役使的结果,不能脱离公司建立的信任文化。

产业聚集的机理分析

在现代经济发展中 ,特定产业向特定地理区域内的聚集 ,在推动企业、产业乃至一国的经济增长和竞争力提高的过程中 ,已扮演出了越来越重要的角色。国内外许多学者和企业管理实践者对这一现象也已作了深入的探讨。本文目的是试图从产业聚集的“自强化机制”或“地区集中化经济效应机理”的角度 。

组织变革中的路径依赖机制及破解策略研究

路径依赖是组织积累资源和生存的必要条件,但是基于路径依赖的组织变革会使组织陷入非效率的路径而无法摆脱,而当前学者们对于组织变革中路径依赖的形成机理的讨论比较缺乏。文章剖析了组织变革中路径依赖机制形成的三个阶段的内部特征,揭示了组织变革路径从生成到锁定的演化机理,并在此基础上提出了破解组织变革中路径依赖机制的管理对策。

内忧外患下的中国烟草专卖制度困境分析

烟草行业作为"计划经济最后的堡垒"其合法垄断地位岿然不动。但是经济强国的强力摇撼、曲径通幽的零星侵蚀、烟草行业竞争力衰竭的自强化机制、专卖制度理论基石的滑落、法定垄断的豁免与反垄断的尴尬、烟草专卖法实施条例对烟草专卖的法定垄断的扩大等因素综合决定了烟草专卖制度必须进行改革。

中心-外围理论与美元本位制

普雷维什的中心—外围理论虽然诞生于60年前,但在全球经济高度一体化的今天,依然有较强的解释力。当今世界形成了以美国为中心国,以欧洲和大部分新兴市场国家、发展中国家为外围国的格局。美元本位制既是这一新格局的鲜明体现,又进一步强化了这一格局。本文认为当前的国际分工格局除具有整体性、差异性、不平等性特点外,还具有自强化性的特点。这些特点决定了尽管美元本位制存在深刻的矛盾,但其为新的国际货币体系所取代将是长期而反复的过程。

Study on Adaptive Shape Optimization

Aim To introduce a new method of adaptive shape optimization (ASOP) based on three-dimensional structure boundary strength and optimize an engine bearing cap with the method. Methods Using the normal substance's property of thermal expansion and cooling shrinkage,the load which is proportional to the difference between the nodes' stress and their respective objective stress were applied to the corresponding variable nodes on the boundary.The thermal load made the nodes whose stress is greater than their objective stress expand along the boundary's normal direction and the nodes whose stress is less than objec- tive stress shrink in the opposite direction , This process would repeat until the stress on the boundary nodes was converge to the objective stress. Results The satisfied results have been obtained when optimizing an engine bearing cap.The mass of the bearing cap is reduced to 55 percent of the total. Conclusion ASOP is an efficient,practical and reliable method which is suitable for optimizing the shape of the continuous structures.

The Collapse Intensity of Cavities and the Concentration of Free Hydroxyl Radical Released in Cavitation Flow

Enhancing the chemical reaction processes by means of the energy released in the collapse of micro bubbles or cavities in the cavitation flow is a new research area. In the previous work, a new approach of measuring concentration of free hydroxyl radicals induced in cavitation flow by using methylene blue as the indicator was developed and used to study concentration of free radical induced in Venturi cavitation flow under various experimental conditions. In the present research, the radial evolution of a cavity bubble and the corresponding collapse pressure in sonic cavitation field are obtained by solving three different bubble dynamics equations： Rayleigh equation, Rayleigh-Plesset equation and Gilmore equation. By comparing with the experimental data on the radial evolution of a cavity bubble in the literature, it is found that the predicted results by the Gilmore equation, which takes account of the compressibility of fluid in addition to the viscosity and interfacial tension, agree with the experimental ones better than those by other two equations. Moreover, the theoretically predicted collapse pressures are consistent with the concentration of the free hydroxyl radical induced in the experimental venture. Thus, the concentration of the liberated free hydroxyl radical not only influences the reaction rate but also is used as an available parameter for measuring collapse intensity of cavities.

Using the Fractional Order Method to Generalize Strengthening Buffer Operator and Weakening Buffer Operator

To reveal the relationship between a weakening buffer operator and strengthening buffer operator, the traditional integer order buffer operator is extended to one that is fractional order. Fractional order buffer operator not only can generalize the weakening buffer operator and the strengthening buffer operator, but also results in small adjustments of the buffer effect.The effectiveness of the grey model(GM(1,1)) with the fractional order buffer operator is validated by six cases.

Is SrRuO_3 Spin Glass

Zero field cooled (ZFC) and field cooled (FC) DC magnetization and AC susceptibility of sintered SrRuO 3 were measured over the magnetic ordering temperature. The peak in susceptibility against temperature shifts to lower temperature when the bias field increases. As the field still increases, the peak breaks into two peaks. One peak still shifts to lower temperature; the other shifts to higher temperature. Zero bias field susceptibility was measured at different frequencies. The peak value decreases as the increase of frequency, but it does not shift to higher temperature as reported previously. The results show that SrRuO 3 is not spin glass, but ferromagnet.

The shortest period of coal spontaneous combustion on the basis of oxidative heat release intensity

It’s necessary to forecast the shortest spontaneous combustion period for preventing and controlling the coal spontaneous combustion.During the experimental process,a calculating model of the SSCP is established on the basis of the oxidative heat release intensity and thermal capacity at different temperatures.According to the basic parameters of spontaneous combustion,heat of water evaporation and gas desorption,the SSCPs of different coals are further predicted.Finally,this study analyzed the relationships of the SSCP and the judging indexes of the self-ignite tendency.The result shows that the SSCP non-linearly increases with the decrease of dynamic oxygen adsorption and increase of activation energy.Compared with the practical fire situation of mine,this reliable method can meet the actual requirement of mine production.

Data⁃Based Feedback Relearning Algorithm for Robust Control of SGCMG Gimbal Servo System with Multi⁃source Disturbance

Single gimbal control moment gyroscope(SGCMG)with high precision and fast response is an important attitude control system for high precision docking,rapid maneuvering navigation and guidance system in the aerospace field.In this paper,considering the influence of multi-source disturbance,a data-based feedback relearning(FR)algorithm is designed for the robust control of SGCMG gimbal servo system.Based on adaptive dynamic programming and least-square principle,the FR algorithm is used to obtain the servo control strategy by collecting the online operation data of SGCMG system.This is a model-free learning strategy in which no prior knowledge of the SGCMG model is required.Then,combining the reinforcement learning mechanism,the servo control strategy is interacted with system dynamic of SGCMG.The adaptive evaluation and improvement of servo control strategy against the multi-source disturbance are realized.Meanwhile,a data redistribution method based on experience replay is designed to reduce data correlation to improve algorithm stability and data utilization efficiency.Finally,by comparing with other methods on the simulation model of SGCMG,the effectiveness of the proposed servo control strategy is verified.