A Positive Comparative Study of Regional Human Resources Quality

1　IntroductionItiswellknownthathumanresourcesareessentialforeconomicoutput.Theinvestmentofhumanresourcescanbemeasuredintworespects,i.e.thequantityofhumanresourcesandthequalityofhumanresources.Theformerreferstotheamountofinvestedmanpow-erandthelatterreferstoefficiencywithwhichtheinvestedhumanresourcesbringeco-nomicoutput.Atpresent,socialeconomistsareoftheopinionthattheeconomicdevelop-mentlevelofaregionispositivelyinfluencedbythehumanresourcesquality.Withthede-velopmentofscienceandtechnology,t…     

Computational intelligence approach for uncertainty quantification using evidence theory

As an alternative or complementary approach to the classical probability theory,the ability of the evidence theory in uncertainty quantification(UQ) analyses is subject of intense research in recent years.Two state-of-the-art numerical methods,the vertex method and the sampling method,are commonly used to calculate the resulting uncertainty based on the evidence theory.The vertex method is very effective for the monotonous system,but not for the non-monotonous one due to its high computational errors.The sampling method is applicable for both systems.But it always requires a high computational cost in UQ analyses,which makes it inefficient in most complex engineering systems.In this work,a computational intelligence approach is developed to reduce the computational cost and improve the practical utility of the evidence theory in UQ analyses.The method is demonstrated on two challenging problems proposed by Sandia National Laboratory.Simulation results show that the computational efficiency of the proposed method outperforms both the vertex method and the sampling method without decreasing the degree of accuracy.Especially,when the numbers of uncertain parameters and focal elements are large,and the system model is non-monotonic,the computational cost is five times less than that of the sampling method.     

MVR污水处理装置控制系统设计

依托山东某化工企业高盐污水处理项目,介绍了MVR污水处理装置自动控制系统,通过工控机与PLC相配合,实现了污水处理过程中温度、液位、流量等工艺参数的自整定、阀门的自动调节、变频器的自动调节、压缩机的自动控制等功能,并通过长时间连续运行,满足了工艺生产要求。     

一锅煮法制备酚醛树脂的研究

在一个反应器内，以盐酸作催化剂，先后进行淀粉水解反应生成葡萄糖，葡萄糖脱水生成５－羟基甲基糖醛，再与苯酚反应生成热塑性酚醛树脂，对影响树脂产率及熔点的诸因素进行了考察，优化反应条件为：苯酚与淀粉摩尔比１．６：１，水解温度１４５℃，水解时间５０ｍｉｎ，缩聚温度１８０℃，缩聚时间６０ｍｉｎ，反应液的初始ＰＨ值１．２，并用红外光谱对产品进行了认证。     

煤系针状焦原料预处理工艺研究进展

本文介绍了煤系针状焦原料预处理工艺研究情况,对几种生产工艺进行了分析、比对,并对今后针状焦的发展方向作了评价。     

Critical electronic structures controlling phase transitions induced by lithium ion intercalation in molybdenum disulphide

We report on first-principles studies of lithium-intercalation-induced structural phase transitions in molybdenum disulphide (MoS2 ), a promising material for energy storage in lithium ion batteries. It is demonstrated that the inversion-symmetry-related Mo-S p-d covalence interaction and the anisotropy of d-band hybridization are the critical factors influencing the structural phase transitions upon Li ion intercalation. Li ion intercalation in 2H-MoS2 leads to two competing effects, i.e. the 2H-to-1T transition due to the weakening of Mo-S p-d interaction and the D 6h crystal field, and the charge-density-wave transition due to the Peierls instability in Li-intercalated 2H phase. The stabilization of charge density wave in Li-intercalated MoS2 originates from the enhanced electron correlation due to nearest-neighbor Mo-Mo d-d covalence interaction, conforming to the extended Hubbard model. The magnitude of charge density wave is affected by Mo-S p-d covalence interaction and the anisotropy of d-band hybridization. In 1T phase of Li-intercalated MoS2 , the strong anisotropy of d-band hybridization contributes to the strong Fermi surface nesting while the d-band nonbonding with S-p facilities effective electron injection.     

江泽民同志论邓小平理论

党的十五大报告正式提出“邓小平理论”这一科学概念，但这一理论的提出，经历了一个曲折的过程。文章从八个方面阐明了江泽民同志论述邓小平理论的科学性、丰富性及深远意义。     

从学习《宇宙奥秘》探究公选课的学习方法

<正>1明确学习公选课的目的目前学生们选修公选课的目的不一,有的想学点东西,有的想找点新鲜,了解一下其它专业内容,但也有很多学生是为积累学分.要学好公选课,明确学习公选课的目的是关键.公共选修课,除了满足学生的学习兴趣外,更重要的是让学生能广泛涉猎不同的学科领域,拓宽知识面.其目的就是在于培养学生的唯物主义世界观,使学生成为既有本专业知识,又具有开拓思想的新时代高素质人才.     

Optimal aeroassisted symmetric transfer between coplanar elliptical orbits

The problem of optimal aeroassisted symmetric transfer between elliptical orbits is concerned.The complete trajectory is assumed as consisting of two impulsive velocity changes at the beginning and the end of an interior atmospheric subarc,where the vehicle is controlled via the lift coefficient and thrust.The corresponding dynamic equations are built and bounded controls are considered.For the purpose of optimization computation,the equations are normalized.In order to minimize the total fuel consumption,the geocentric radius of initial elliptical transfer orbital perigee and controls during atmospheric flight should all be optimized.It is an optimal control problem which involves additional parameter optimization.To solve the problem,a two-level optimization method denoted by "genetic algorithm + Gauss pseudospectral method" is adopted:the genetic algorithm is used for parameter optimization and the Gauss pseudospectral method is used for optimal control problems.The flow chart of simulation is given.On this basis,the issue of more realistic modeling with two finite-thrust subarcs in the nonatmospheric part of the trajectory is simultaneously addressed.The orbital transfer problem is transformed to three continuous optimal control problems,and the constraints at different times are given,which are respectively solved by using the Gauss pseudospectral method.The obtained numerical results indicate that the optimal thrust control is of bangbang type.The minimum-fuel trajectory in the atmosphere consists of aeroglide,aerocruise and aeroglide.They are compared with the results of pure impulsive model,and the conclusions that a significant fuel saving will be achieved by synergetic maneuver are drawn.