线性规划模型在企业人力资源管理中的应用研究

众所周知,人力资源是企业最宝贵的财富,是企业利润的创造者、维护者和推动者.众多研究成果表明,企业人力资源已成为企业核心竞争优势的重要源泉.本文探讨了现代企业人力资源管理的概念、内涵和特点,通过实例,运用管理运筹学中的线性规划模型对企业人力资源分配和管理问题进行了科学计算和计算机模拟仿真.其结果表明了该模型的有效性、可靠性和实用性,为企业人力资源管理提供了一种新的科学计算方法.因此,本文的研究具有较强的应用价值.     

实验动物饲料生产的质量控制

目的:实验动物饲料生产质量控制值得重视.方法:可通过饲料配方、原料、饲料加工、成品饲料的烘干和贮存、成品饲料的灭菌、成品饲料的检验等进行饲料生产质量控制.结果:只有严格执行实验动物饲料营养标准,层层把关,才能保证实验动物饲料质量.结论:严格控制饲料生产过程才能保证实验动物饲料的质量.     

体育专业大学生恋爱伤害现状实证分析

对我国中部地区部分高校510名体育专业大学生的恋爱伤害现状进行实证调查,结果显示体育专业大学生:恋爱受到伤害人数多、等级重;恋爱伤害致因及遭遇伤害后的心理想法、行为表现、应对方式与普通专业各有不同;男生受伤害比率显著高于女生;女生被动受伤较多,但女生对伤害的应对比男生更积极;有性行为恋爱受伤者,其呈现出的心理、生理伤害更严重,想法和行为更极端。高校应加强对体育专业大学生恋爱情感心智及恋爱伤害规避教育。     

Cell separation and transportation between two miscible fluid streams using ultrasound

This paper presents a two-stream microfluidic system for transporting cells or micro-sized particles from one fluid stream to another by acoustophoresis. The two fluid streams, one being the original suspension and the other being the destination fluid, flow parallel to each other in a microchannel. Using a half-wave acoustic standing wave across the channel width, cells or particles with positive acoustic contrast factors are moved to the destination fluid where the pressure nodal line lies. By controlling the relative flow rate of the two fluid streams, the pressure nodal line can be maintained at a specific offset from the fluid interface within the destination fluid. Using this transportation method, particles or cells of different sizes and mechanical properties can be separated. The cells experiencing a larger acoustic radiation force are separated and transported from the original suspension to the destination fluid stream. The other particles or cells experiencing a smaller acoustic radiation force continue flowing in the original solution. Experiments were conducted to demonstrate the effective separation of polystyrene microbeads of different sizes (3 μm and 10 μm) and waterborne parasites (Giardia lamblia and Cryptosporidium parvum). Diffusion occurs between the two miscible fluids, but it was found to have little effects on the transport and separation process, even when the two fluids have different density and speed of sound.     

运动性疲劳对跑运动学与下肢肌电的影响

目的:通过对人体跑至疲劳过程中的运动学与下肢表面肌电图变化特征进行分析,为更好地认识疲劳对人体运动动作的影响提供参考。方法:选取8名男性受试者在跑台上进行12km/h恒速度跑至疲劳,对3个阶段运动学参数及表面肌电时频指标进行单因素方差分析。结果:跑至疲劳的3个阶段,1)单步步长和步频均存在显著性差异(P<0.05),右脚至左脚步长减小(均值为1.68m、1.65m、1.65m),步频增加(均值为2.77步/s、2.84步/s、2.87步/s),而左脚至右脚步长增加(均值为1.61m、1.64m、1.64m),步频减小(均值为2.88步/s、2.84步/s、2.78步/s);2)躯干倾斜、扭转幅度显著增加(P<0.05),髋、膝关节角度出现规律性变化(P<0.05),踝关节角度变化无统计学意义(P>0.05);3)下肢肌积分肌电总体呈上升趋势,不同肌肉平均功率频率指标变化趋势并不一致。结论:中等强度恒速跑至疲劳过程中,随着疲劳的产生与发展:1)从左脚至右脚单步步长增加、步频减慢,而从右脚至左脚出现相反的变化规律,躯干扭转幅度变大,后仰增加,"坐姿"跑成为必然趋势;2)除腓肠肌外,下肢肌肉的积分肌电逐渐增加,平均功率频率呈下降趋势,但左右侧变化的时间段和幅度不完全一致。     

论体育人类学研究范式中的田野调查关系

采用文献资料调研与逻辑分析法,就某学者提出的在体育人类学研究中应"分离观察者与被观察者的文化处境"这一观点,从田野调查的目的,调查点的选取与介入,资料的获取与分析等方面进行了探讨。研究认为:1)人类学的发展经历了从异邦到本土的过程,而中国的体育人类学一开始便立足于解决本土民族体育的"残存"问题;2)研究者在研究过程中,应保持与研究对象的适度张力,"摇摆人"的研究视角较为客观与完整;3)对于田野资料的收集,应该适时地把"现场"与"文献"相结合并加以甄别与印证;4)对于田野资料的客观陈述是阐释的基础。     

北京太极竞技推手的现状调查与发展对策

北京市太极竞技推手至今已有十二年的历史,文章以近几年北京太极推手比赛为研究对象,深入分析参赛人数、参赛单位、使用技术动作和裁判的执法水平等情况,以期发现北京竞技推手目前存在的问题,并进一步探讨北京竞技推手如何发展。     

Target-synchronization of the distributed wireless sensor networks under the same sleeping–awaking method

Based on the conflict and crosstalk avoidance mechanism (CCAM), we propose a sleeping–awaking method for wireless sensor networks (WSNs) in which the maximal degree node (MDN) and all its neighbors run sleep or wake simultaneously while other nodes run the CCAM. This method is said to be the same sleeping–awaking method (SSAM). The SSAM is motivated by the congestion and collision problems of cliques, MDN and its neighbor set in the communicating graph of the WSN. In this communication way, the related protocol about the SSAM is provided accordingly. Under the designed protocol, we get a Markovian switching WSN with both white noise disturbance and multiple time-varying delays. Based on the theory of exponential stability in pth moment, we show that the protocol ensures the WSNs to keep in synchronization with the target function. A numerical example shows that the WSN can keep its target-synchronization even with large time delays.     

Robust sliding mode guidance and control for soft landing on small bodies

The variable structure control (VSC) with sliding mode is presented to design a tracking control law to ensure the fast and accurate response and robustness of guidance law in this paper. First, the small body dynamic equation is deduced in the landing site coordinate system. Second, the desired trajectory is planned in the condition of safe soft landing constraints. Third, the guidance law based on VSC is designed to track the desired trajectory and succeed in landing on the surface of small body. Finally, the guidance and control algorithm is formed and the effectiveness of algorithm is verified by numerical Monte Carlo simulations.     

危机潜伏期的企业竞争情报预警机制研究

分析危机潜伏期的危机特征和危机处理;采用案例分析法选择华为海外行贿风波事件进行分析,为危机潜伏期企业竞争情报顸警机制的设计提供支持;设计危机潜伏期的企业竞争情报预警机制;希望通过建立有效竞争情报预警机制,帮助企业在危机潜伏时期提高企业竞争情报工作的效率,解决危机问题。