简论李觏的气本原说

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昆明奶牛毛发中某些常量及微量元素含量初探

一些常量元素及微量元素对动植物体的健康成长有着明显影响。我们研究了高产奶牛与一般奶牛牛毛中某些常量及微量元素的含量,发现高产奶牛牛毛中许多常量及微量元素的平均含量均高于一般奶牛,而钴、砷、铜、硒、钾、铬及钼在高产奶牛和一般奶牛个体牛毛中的含量较少交错或者不交错。     

Web Service消息安全验证机制

主要讨论了DotNet环境下利用Web Service进行数据传输时存在的安全漏洞,对这一系列安全问题及其解决方案进行了探讨.作为Web Service的基本安全规范,WS-Security针对这些做出了规定,解决了如何对非法字符串进行过滤、如何对SOAP消息加密等问题.     

Preface

Different from traditional tax audit, supervision with self-audit is a combination of audit by the taxpayer himself and audit by the tax authority. This paper mainly studies a taxpayer’s optimal policy of tax evasion under supervision with self-audit and its related properties, in order to deduce some effective suggestions and theoretical bases to restrain tax evasion. Assuming that only a certain proportion of evaded tax can be discovered when the audit is executed, the authors first formulate a static model with self-audit. This model is divided into two stages. At the first stage, taxpayers declare their taxes, then the tax authority chooses audit objects, based on a known probability, and announces the result; if the taxpayer is chosen, he will enter the second stage, during which he has a chance to pay the evaded tax and the corresponding late fees and then is audited by the tax authority. The authors show the existence and uniqueness of the optimal amount of tax evasion at the first stage and the optimal proportion to self-expose at the second stage. The authors also discuss the related properties of the interior solution, and do elasticity analyses on some parameters. Besides, the authors extend the static model into the corresponding two-period model, and study the existence and uniqueness of the solution of the extended model. Finally, under the assumption that tax evasion can only be discovered with a certain probability when the audit is executed, the authors formulate another static model with self-audit and investigate its properties. This research is partially supported by the National Natural Science Foundation of China under Grant Nos. 60674082, 70221001, and 70731003.     

《红豺》的生态伦理学解读

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树状管网技术经济计算分析

通过对目标函数(年费用折算值)W0在水力约束条件下最小值的分析计算,介绍了起点水压未知树状管网技术经济计算的方法,并求出了相应的经济水头损失hij和经济管径Dij的表达式。     

《雷雨》与祈雨仪式--曹禺剧作《雷雨》的文化学阐释

曹禺的《雷雨》之所以具有经久不衰的文化魅力并深受作者自己的喜爱,一个未被人们发掘出来的原因是它再现了一个古老的原型——祈雨仪式。在无意识的驱使下,曹禺以现代话剧的形式把古老的祈雨仪式再现在人们面前,不仅让人们重温了祈雨仪式中蕴涵的人类文化精神,也为人们树立了一个在人生旅途中必须不断审视自我、拯救自我、完善自我的范例。     

膜结构裁剪及展开的修正二次测地线法

对膜结构裁剪分析中目前应用较广的裁剪线的生成方法进行了比较研究，提出修正二次测地线法。确定了采用测地线作为裁剪线及展开图形的基准线。之后对已有图形展开方法——二次测地线法做了适当改进，提出修正二次测地线法。     

防火卷帘闭式自动喷水灭火系统的设计

防火卷帘取代防火墙后，应对防火卷帘实施闭式自动喷水保护，从自喷的水量、火灾延续时间喷头的布置等几方面进行了探讨。     

关于双语课程《数字电子技术》学习状况的调查与思考

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