麻毡边角料开松工艺的探讨

本文提出一种汽车内装饰板加工中产生的边角料的开松方法,以解决此类边角料的处理难题,所得麻纤维能满足制毡要求。     

数字高清晰度电视地面广播COFDM传输方案

数字高清晰度电视是新一代电视的发展方向,常用的传输方案是编玛正交频分复用（ＣＯＦＤＭ）方案和大联盟（ＧＡ）的残留边带调制（ＶＳＢ）方案。文中介绍了在于ＣＯＦＤＭ的数字高清晰度电视全数字发送部分的基本传输方案和硬件实现,分析了误码率等性能,并给出了实验结果。     

微分方程在构造微分中值命题的辅助函数中的应用

众所周知,Lagrange定理、Cauchy定理[1]及其它许许多多微分中值命题的证明均借助于构造一个适当的辅助函数。然而,如何作辅助函数,如同作几何证明中的辅助线,需要较高的技巧,无一定法则可循,这给教学带来了难处。文[2]给出了一种辅助函数的“统一”构造法,只需按照一套固定的程序即可。本文利用简单微分方程的解构造出中值问题的辅助函数,从而得到寻求辅助函数的一种新方法。     

奇异线性系统E_(n×n)=A_(n×n)X初值问题的通解公式

给出了奇异线性系统E_(nxn~x)=A_(nxn~x)的通解公式,并研究了初值问题解的结构.     

A preliminary inquiry on the problem of unplanned (extra-quota) second births

The resurgence of child births in China in 1981 was marked by a decline in the multiparity birth rates and a drastic rise in the rate of unplanned 2nd births, resulting in unplanned 2nd births outnumbering multiparity births. The aim of this investigation was to find the objective and subjective causes for the unplanned 2nd births and explore ways to bring them under strict control. In the countryside there are loud voices that give insufficient labor as their reason for wanting 2nd births. An analysis of 923 cases of unplanned 2nd births in connection with the economic conditions of the families, the sex of the 1st births, intervals between the births, and the parents' cultural level shows that 61.87% of the total number of families suffered a decline in their income. The effect of the sex of the 1st birth over the 2nd birth varies with different localities. Among those having unplanned births, illiterates accounted for more than 35% in Nanzheng and Yanchuan counties and over 20% in Mianxian and Wubao counties. The current rise in 2nd births is due mainly not to economic reasons but to social and psychological reasons. To effectively hold down 2nd births under the current conditions, the following suggestions are offered: 1) step up propaganda and education work to gradually raise people's consciousness for practicing family planning, 2) family planning measures of economic restriction and reward must be implemented, 3) on the basis of enforcing the new marriage law, late marriage should be promoted, 4) a population tax should be imposed, and 5) social insurance for the elderly should be enlarged.     

A historical demography of Chinese migration

Trends in international migration from China are analyzed from historical times to the present. "The study will involve discussions about the nature of migration and the different forms it took in five different stages, in the light of 1) changes in motivation, 2) type of migration, and 3) the distribution of the out-going population."     

对中国制造业运作策略的聚类分析及实证研究

本文以企业运作策略的基本理论为基础,研究制造企业的运作策略。通过问卷调查的方法,选择天津、珠江三角洲和香港三地为代表地区,讨论了制造业的运作重点,并在研究了问卷结构有效性的基础上,对企业样本做聚类分析,并对三地的企业运作策略做了比较分析。     

东北地区离婚率特征分析及原因思考

改革开放以来,随着社会经济的发展和进步,我国的离婚率也不断上升。离婚率节节攀升,既有着深刻的时代背景和社会背景,也映射出人们价值取向的变化,不能简单地用好与坏来为这种社会现象定性。从1995~2008年全国各地区粗离婚率来看,东北地区的离婚率在全国各地区离婚率排名中始终名列前茅,并且呈逐年上升的变化趋势。东北地区离婚率偏高的原因,除了与全国其他地区相类似的社会、经济等原因外,还与东北地区特有的城市化水平、受教育程度、区域文化、民族构成、人口流动规模等密切相关,是多种因素综合作用的结果,具有一定的客观必然性。     

论散文的语体美

语体就是由语言含义、语言结构、语言情采和用语手段等因素构成的语言表达的整体形态。它受个人的情性、用语习惯、审美观念等因素的制约。而散文是写情写性的 ,因而其语体也呈现出独具情性的审美特征。或本色天然 ,自由真率 ;或铺采扌离文 ,金声玉振 ;或标新立异 ,活跃灵动。如此种种 ,多姿多彩。总之 ,散文的语体是个性化 ,多维度 ,同时又是极具地域特色和时代感的。