针对传统电流源逆变器(current source inverter,CSI)超高速电机驱动系统存在的控制对象阶次高、电流调节器设计困难问题,提出基于混合型两级式CSI的改进型控制策略.其基本思想为:前级引入宽禁带(wide band gap,WBG)器件高频调节定子电流幅值;后级采用普通硅器件调节定子电流相位.在此基础上,为实现最大转矩电流比控制,提出单电流传感器锁相环(phase-locked loop,PLL)方案,通过对转子位置信号与相电流锁相实现电流相位自动校正.混合型CSI前后级通过该改进控制策略进行协同控制,从而实现闭环系统降阶.同时考虑到混合型CSI在超高基频运行条件下控制延迟的实际问题,进一步完善电流控制环路模型,并与CSI传统拓扑及其控制策略下的电流环稳定性及动态性能进行深入分析与对比.最后研制一套混合型CSI驱动平台,并以一台(550000r/min)/110W的超高速永磁同步电机(ultra-high-speed permanent magnet synchronous motor,UHSPMSM)为对象进行仿真及实验验证,结果表明混合型驱动拓扑及改进型策略具备更高的稳定裕度与动态性能.

女性领导为什么总是特别被关注?是因为从事领导职务的女性,在领导群体中占比不高.换句话说,大家潜意识里会认为,女性在医院里面成长为院长、书记,比男性会更难一些,玻璃天花板现象尤为突出.公立医院在社会上有特殊的存在意义,在医院工作的女性占比超过了医院总人数的2/3,中层女性领导占比非常庞大,本文对公立医院女性中层领导行为特征进行研究.

A control strategy without current and rotor-position sensors is proposed to drive the ultra-high-speed permanent magnet synchronous motor (UHSPMSM) fed by current source inverter (CSI), which is beneficial to the simplification of control structure as well as the reduction of system size and cost. In the proposed control strategy, command currents of the CSI are obtained by mathematical calculation with reference currents of the motor stator, leading to the removal of current sensors. In addition, an improved sliding- mode-observer (SMO) is used to calculate rotor position, allowing the rotor position sensor to be eliminated. A prototype and the control system were built and the control strategy simulation by utilizing the actual parameters of the prototype was conducted, which verify the effectiveness of the proposed control strategy under 550000rpm.

The introduction to modem hospital management mechanism and performance management comprehensively improve the work enthusiasm,creativity and initiation of medical staff,and continuously increase the core competitiveness and sustainable development of hospitals.Improving the work enthusiasm is the key target of new medical reform through the performance management.The performance management had achieved the major attention among medical management staffs.However,the effect of performance management has not reached expectations because of different management styles,and has also reduced the quality of medical service.This paper introduces a series of matters related to performance management,aimed to explore the reasons and provide references of this phenomenon.

The affiliated hospitals of colleges and universities with strong comprehensive strength and competitive advantage have profound historical background,distinctive culture and excellent value system.To raise the management level,gather development strength and improve hospital comprehensive strength,the hospitals should strengthen hospitals' culture construction.Cultural research and construction of hospitals has been a pressing problem,with the increase in the number of affiliated hospitals in China's colleges and universities,which is also a basic,strategic and forward-looking work.The cultural construction of affiliated hospitals of universities and colleges in China is generally confused with ideological and political work,seriously disjointed from the culture of colleges and universities.Its implementation process is often in the form of surface.The correct understanding of the cultural connotation of universities hospital needs to learn from the advanced experience at home and abroad,organically integrate the campus culture and hospital culture,and improve the system to better adapt to the field of biomedical and medical market facing opportunities and challenges,and to promote the progress and development of life science and medical security.

Objective:To examine the influence factors of work passion of general practitioners and action mechanism based on an organizational behavior perspective.Methods:A questionnaire survey was conducted to collect the data among general practitioners selected by stratified convenience sampling method in Heilongjiang Province.The influence factors were screened using stepwise multiple linear regression analysis.Results:The factors that the age (F=5.815,P=0.001),marriage situation (F=2.243,P=0.085),work nature satisfaction (β=0.360,P＜0.001),organizational identification (β=0.261,P＜0.001),income satisfaction (β=0.200,P＜0.001) and turnover intention (β=-0.167,P＜0.001) had a positive influence on work passion.Conclusion:To arouse the work passion of general practitioners,the stereo,various and multi-level incentives should be considered from the outer material rewards,inner psychological experience,individual subjective experience and group social identity comprehensively.

我国医疗卫生事业单位人事制度改革是在用人双轨制的背景下展开的,关于事业单位聘用关系的法律适用问题颇有争议,本文对聘用制改革的法律依据进行了深入分析,并针对如何推进人事聘用制度改革提出了一些可行性的建议.

Objective:To build a competence model of management personnel working at logistics department in public hospital.Methods:318 staffs working at logistics department in public hospital were employed with a convenience sampling.The questionnaire survey was used to collect data,and the exploratory factor analysis method was performed with SPSS19.0 software to build the competence model.Results:Results of exploratory factor analysis showed that the competence model was consisted of 7 dimensions that including servant characteristic,professional knowledge,organization and coordination,striving for excellence,office skills,observe discipline and professionalism,and 27 items of competence were reserved in model.Model had a good construct validity and internal consistency reliability.Conclusion:In this study,a groundbreaking competence model of management personnel working at logistics department in public hospital was built,which could be used on several aspects,such as recruitment,promotion and evaluation of one's performance and so on.

目前我国主要采用按医疗服务项目付费的临床诊疗模式,其最大弊端在于容易促使医疗机构提供过渡的医疗服务,诱导刺激医疗消费,导致医疗费用过快增长.通过学习国外的实践经验,发现DRGs-PPS模式更能使政府、医疗机构、患者三方共赢,更有利于控制医疗费用的不合理上涨,同时对提高医疗服务质量、规范医疗行为具有更重要的意义.

探讨公立医院财务风险预警模型的构建,将沃尔评分法应用于某公立医院的财务分析之中,以盈利能力、偿债能力、营运能力和发展能力作为一级指标,并提出建议:加强风险预警意识、提高财务人员的业务素质、医院信息系统的支持、定量研究与定性研究相结合、建立报告分析处理制度.

Along with the development of medical and health services,hospital administrators gradually transferred to hospital management.Financial index is analyzed one by one through Dupont Analysis Method to know the financial condition of the hospital as soon as possible and to control the occurrence of financial risk.

Human resources from the traditional manual management mode to modern information management mode,is a major change.From the perspective of information,information on the human resource management in third grade hospitals of a tentative study is explored.Combined with the actual situation of the hospital,suitable hospital development of hospital information management system of human resources is explored,to enhance the core competitiveness of the hospital,to improve medical service depth and the breadth,and to benefit society.

The hospital performance appraisal refers hospital manager combines with the actual situation of the hospital,in order to achieve the hospital business objectives,by specific criteria and indicators,and adopt scientific method to conduct evaluation on workers' behavior and the work performance,and using assessment results to produce a positive guiding procedures and methods to future employees' behavior and work performance.Because of relatively large size and more personnel,three-level hospital's performance assessment is more important.

随着我国公立医院绩效评价体系在医院管理过程中的广泛应用,已逐渐从尝试阶段向成熟阶段、从表层应用向深入应用推进[1].根据医院的绩效进行赏罚,缺乏制约医院的有利措施,医院往往存在如效率低下、资源浪费、人才流失和对需求的反应性差等问题.对于医院来讲,既要面对医院改制转型,又要适应卫生管理体制和医疗保障制度的改革.如何客观公正地考核医院的绩效,是卫生决策者和医院管理者一直致力于解决的问题.

When a market demand appears,the agile supply chain need make the decision of supplier selection and its production and transportation schedule,the decision process is very complex.Based on the representation of time slots,an INLP model is designed to describe the scheduling problem firstly, which takes minimizing the total inventory,production and transportation cost of the supply chain as the objective,and delivering just in time as precondition.Then,in order to solve the INLP model,a Hybrid Genetic Algorithm(HGA) whose chromosomes are made up of the time slot's codes is developed,and a greedy-sequence decoding method,which can achieve certain solution meeting all the time and quantity constraints of the model,is designed to accelerate the process of HGA's convergence and get optimal solution.Finally,a scheduling example verifies the practicality and effectiveness of the algorithm.

Based on in-depth study and analysis of Nonaka's research results,this study gives the opinion that SECI spiral's radius represents for knowledge quantity and height represents for knowledge level;then analyzes the evolution of knowledge quantity and level in S-E-C-I four processes and reaches the result that in socialization and internalization knowledge quantity increases,in externalization knowledge level increases and both quantity and level increase in combination.At the same time,this study reaches the relationship between knowledge quantity and knowledge level.

In a price-sensitive supply chain,each business partner as independent profit unit defines the relationship between batch order and ordering price based on members' profit preferences and resource conditions.The ordering quality of products is strongly related to a member's price decision-making processes for purchasing,supplying,production,logistics and selling activities.The operating cost and profit of a supply chain is different from that of total product quantity and distribution.Planning can reduce operating cost and improve profitability and market competitiveness for a price-sensitive supply chain.An effective planning can further lower resource consumption and make contributions to sustainable development of society and economy. This research studies a four-stage price-sensitive supply chain consisting of multiple suppliers,one manufacturer,multiple distribution centers and multiple retailers.A manufacturer needs to make decisions on supply chain network planning activities,such as supplier selection for parts and logistics support,sourcing from different suppliers,and distribution and selling of final products via different retailers.The network planning problem is complicated and requires supply chain managers apply a good decision-making algorithm to obtain a satisfactory solution on a timely basis. We first build an integer non-linear planning(INLP) model to represent network planning problems.We then use the heuristic repair method embedded with the hybrid genetic algorithm(HGA) to resolve the model.Finally,we use simulations to verify the model validity,as well as the stability and efficiency of the algorithm.It is essential to build a general structure model and mathematical model for optimizing supply chain planning due to the multi-forms of actual supply chains. In the first part,we describe the planning problem in detail,and design a general structure model for supply chains to represent the relationships among the members.We also build an INLP model to calculate price sensitivity of supply chain networking planning by including all quantity constraints.The values of decision variables increase exponentially as the number of nodes and node capacity increase.In the second part,a hybrid genetic algorithm is proposed to solve the INLP model.HGA techniques used in the study include integer encoding,heuristic repair strategy,representation of fitness function,and the selection of genetic operators.The primary focus of the algorithm is the heuristic repair strategy with price sorting rules.The strategy can not only ensure the validity of chromosomes,but also guarantee the lower cost of the chromosomes.In the third part,an example is simulated to check the validity and practicability of INLP model and HGA.Simulation results are compared to SAS/OR testing and show that our proposed algorithm can effectively resolve complex supply chain planning problems. Price-sensitive supply chain structures and pricing mechanisms are diverse.The network planning INLP model with the hybrid genetic algorithm can obtain a satisfactory planning solution for a price-sensitive supply chain.

In order to solve the insertion order scheduling problem of agile supply chains for production planning,a two stage supply chain composed of one factory and many suppliers was studied.Taking the minimization of the total supply chain cost as the objective,an Integer Planning (IP) model was designed to describe the scheduling problem based on the time slot representation of each firm's available scheduling periods,and an One-by-One Selection Heuristic (OOSH) algorithm was proposed to resolve the IP model.Finally,by contrast with the calculation results of Distance Priority (DP) and Cycle Time Priority (CTP) algorithms in some scheduling experiments,the feasibility and effectiveness of the model and algorithm were verified.The experimental results also reveal that the form of agile supply chain is competitive.

In this paper we study the static scheduling problems of definite market demands with time constraints in agile supply chains, which consist of multi-stage members with limited capacities. We establish a framework model to picture the supply chain’s structure and an integer nonlinear programming (INLP) model to describe the scheduling problem. Then we design a two-step algorithm with lower complexity to resolve the INLP model. 1) the shortest response time scheduling algorithm to judge whether the supply chain can meet the demands’ time constraints, 2) the lean scheduling algorithm to abtain the minimum inventory cost of the supply chain.Finally, we verify the practicality and effectiveness of the model and algorithms by a numeric experiment.