服装工厂工时定额的测定与分析

浮余率和纯加工时间是制定服装生产工时定额的重要参数。本文就有关的观测方法与公式应用进行了探讨。通过对服装工厂工时定额的实测与比较,分析了定额出现差异的原因,并指出了利用工时定额研究以促进服装生产效率提高的途径。     

Solutions of the generaln-th order variable coefficients linear difference equation

In this paper.variable operator and its product with shifting operator are studied.The product of power series of shifting operator with variable coefficient is defined andits convergence is proved under Mikusinski’s sequence convergence.After turning ageneral variable coefficient linear difference equation of order n into a set of operatorequations.we can obtain the solutions of the general n-th order variable coefficientlinear difference equation.     

Modeling and Computation of CO2 Allowance Derivatives Under Jump-Diffusion Processes

In this paper, we study carbon emission trading whose market is gaining popularity as a policy instrument for global climate change. The mathematical model is presented for pricing options on $CO_2$ emission allowance futures with jump diffusion processes, and a so-called fitted finite volume method is proposed to solve the pricing model for the spatial discretization, in which the Crank-Nicolson is employed for time stepping. In addition, the stability and the convergence of the fully discrete scheme are given, and some numerical results, which are compared with the closed form solution and the Monte Carlo simulation solution, are provided to demonstrate the rates of convergence and the robustness of the numerical method.     

“两免一补”对皖西北武术学校发展影响的研究

目的:了解"两免一补"的政策对武术学校发展的影响,探讨民办武术学校在新形式下更好生存和发展;方法:运用调查法、访谈法对皖西北十二所武术学校进行研究;结果:两免一补"的惠民政策对武术学校发展不是唯一的影响因素;结论:政府相关政策的调整、支持和武术学校加强自身建设是办好武术学校重要保证.     

建立我国农村最低生活保障制度的政策选择

在论述我国建立农村最低生活保障制度必要性的基础上,分析了我国现阶段农村最低生活保障制度建设的现状及问题,并提出了对应的政策选择。     

工艺过程尺寸链综合分析与解算

机械加工中工序尺寸关系复杂的零件,其工序尺寸、公差及余量的确定问题,需用工艺过程尺寸链作综合分析与计算.本文试图改变传统的方法,依靠建立数学模型,利用数学计算求解该问题,使其结果(数据)更为合理和准确。     

单镶套冷镦凹模的新的设计方法

本文从拉梅公式,莫尔强度理论出发,通过引入拉压强度极限比V、等强度系数β,导出了单镶套模具的设计公式;揭示了容许内压p随K、β、V、[σ]的变化规律;提出了予紧过盈量的最佳选择范围。通过算例说明合理选择配对材料和适当加火过盈量是提高模具寿命的有效途径。     

磨齿加工工艺探讨

本文根据磨齿加工的工艺特点,讨论了磨齿加工砂轮的选择原则,分析了影响磨齿余量的因素,提出了磨后齿对磨前齿轮齿形的要求．     

Scepticism,context and modal reasoning

I analyze some classical solutions of the skeptical argument and some of their week points (especially the contextualist solution). First I have proposed some possible improvement of the contextualist solution (the introduction of the explicit-implicit belief and knowledge distinction beside the differences in the relevance of some counter-factual alternatives). However, this solution does not block too fast jumps of the everyday context (where empirical knowledge is possible) into skeptical context (where empirical knowledge is impossible). Then I analyze some formal analogies between some modal arguments on the contingency of empirical facts (and the world as whole) and the skeptical arguments against empirical knowledge. I try to show that the skeptical conclusion “Empirical knowledge does not exist” is logically coherent with the thesis that they are empirical facts and that we have true belief on them. In order to do that without contradictions I have to accept a non-classical definition of knowledge: S knows that p:= S is not justified to allow that non-p. Knowledge and justified allowance function here as some pseudo-theoretical concepts which allow only some partial and conditional definitions by some “empirical” terms and logical conditions.     

论晁错的经济思想：兼与贾谊思想比较

晁错认为，政治的目的是发展经济，“开其资财之道也”，主张统治者要“贵五谷而贱金玉”；针对当时社会经济存在的“蓄积少”、“本轻末重”等问题，晁错提出了人粟拜爵的主张；而对于匈奴的不断侵扰，他又提出了移民实边的建议。晁错的这些思想对当时乃至以后历代都产生了重大的影响。