高校内部学生管理规定的性质、价值定位与法律规制

公立高等学校的法律地位以及“大学自治”的传统和要求都决定了公立高校内部学生管理规定是学校受权执法和自主管理的有机统一。在依法治校、依法治教的经济社会发展背景下,内部学生管理规定在内容安排和程序设计上应当服从高等教育的基本宗旨并遵从“以人为本”的精神和原则。为实现对内部学生管理规定的有效法律规制,应当通过完善立法确保在其制定过程中遵循和贯彻法律保留原则、比例原则以及民主程序保障原则等行政立法一般原则,并应在进一步加强行政监督的同时允许司法机关对其进行有限的司法审查。     

浅析伊通河地表水中镉迁移转化的规律

通过近4a对伊通河长春段6个地表水监测断面中重金属镉的研究，结果表明，地表水中镉的含量随流程的增加而增加，年平均含量也在递增。此外，研究区域内，镉以Cd^2＋为主，且镉有接近超标并逐年升高的趋势。     

JSP软件开发中数据库连接池技术的探讨与应用

结合传统情况在开发基于数据库的Web应用时,对后台数据库的访问模式,讨论了如何使用数据库连接池思想解决存在的问题.描述了数据库连接池的基本概念、工作原理,分析了关键问题,并且以tomcat服务器上实现MySQL数据库连接池和编写数据库连接池类为例,实现连接池的应用.     

基于次最优模型降阶的自整定PID控制器

针对过程工业中含有振荡环节和大滞后环节较难控制的被控对象,设计了一种基于频域辨识的自整定PID控制器.该控制器采用次最优模型降阶算法,辨识出二阶加纯滞后的模型;然后基于给定的相位裕度和幅值裕度,整定出PID参数.并通过仿真实验表明对于不同的被控对象,自整定得到的PID参数均能取得较好的控制效果.     

试论新时期以来中国文艺学的大发展

新时期以来，中国文艺学获得了长足的多元的发展，这种大发展主要表现在文学观念冲破旧有束缚、张扬人文精神，在自律与他律的辩证统一中探索和把握文学的审美意识形态本质，并在此基础上促使文学理论走向多元和成熟；文学研究方法也在借鉴中外文论和其它学科研究方法的基础上取得突破和创新，有力推动了文艺学研究方法的多元化，反过来又促进了新时期文学观念的拓展和更新。     

论现代高校图书馆员的服务理念

探讨新时期网络条件下高校图书馆服务工作的特点,树立全新的服务理念。首先要转变服务观念,从被动的“等读者“变为主动的“送信息“,不断扩大传统载体的服务范围,随着电子载体的大量需求使服务向多元化发展。其次积极提高馆员的综合素质,以塑造馆员良好的职业形象为前提,加强馆员的自主学习意识,树立敬业精神,全面、多元的为读者服务。     

Silane as Electrolyte Additives for Lithium Ion Batteries

1 Results In order to overcome the inherent incompatibility of PC with graphite in the lithium ion battery system, improve their electrochemical performance at low temperature,phenyl tris-2-methoxydiethoxy silane (PTMS) has been studied as an additive to the PC-based electrolyte of lithium ion batteries with graphite anode. From the cyclic voltammogram for the graphite anode in the PC-based electrolyte,we find that in the case of the electrolyte without the additive,there is a large irreversible peak ne...     

Effects of historical land cover changes on climate

In order to explore the influence of anthropogenic land use on the climate system during the last mil- lennium, a set of experiments is performed with an Earth system model of intermediate complexity—— the McGill Paleoclimate Model (MPM-2). The present paper mainly focuses on biogeophysical effects of historical land cover changes. A dynamic scenario of deforestation is described based on changes in cropland fraction (RF99). The model simulates a decrease in global mean annual temperature in the range of 0.09-0.16℃, especially 0.14-0.22℃ in Northern Hemisphere during the last 300 years. The responses of climate system to GHGs concentration changes are also calculated for comparisons. Now, afforestation is becoming an important choice for the enhancement of terrestrial carbon sequestration and adjustment of regional climate. The results indicate that biogeophysical effects of land cover changes cannot be neglected in the assessments of climate change.     

Selective Smoothed Finite Element Method

The paper examines three selective schemes for the smoothed finite element method (SFEM) which was formulated by incorporating a cell-wise strain smoothing operation into the standard compatible finite element method (FEM). These selective SFEM schemes were formulated based on three selective integration FEM schemes with similar properties found between the number of smoothing cells in the SFEM and the number of Gaussian integration points in the FEM. Both scheme 1 and scheme 2 are free of nearly incompressible locking, but scheme 2 is more general and gives better results than scheme 1. In addition, scheme 2 can be applied to anisotropic and nonlinear situations, while scheme 1 can only be applied to isotropic and linear situations. Scheme 3 is free of shear locking. This scheme can be applied to plate and shell problems. Results of the numerical study show that the selective SFEM schemes give more accurate results than the FEM schemes.     

BEM Analysis of Wave Propagation in a Water-Filled Borehole in an Anisotropic Solid

This paper describes a time-domain boundary element method developed to analyze the interactions of acoustic and elastic waves near the interfaces between water and an anisotropic elastic solid. Two models are analyzed with one being the interface between two half spaces of fluid and solid and the other being a fluid region sandwiched by half space domains of anisotropic elastic solids. Both monopole and dipole point sources are used to generate an initial pressure wave in the fluid. Some snapshots of the transient wave behavior near the fluid-solid interfaces are given. The effect of the anisotropy in the solid on the pressure waveforms in the fluid is discussed. The numerical results allow detailed arrival identification and interpretation of acoustic and elastic waves propagating along the fluid-solid interfaces.