镁改型蛭石对铵离子的交换性能

对经人工改型所得的镁型蛭石进行了铵离子交换性能的研究．在不同pH值下测定了镁型蛭石对NHr的全交换容量，在不同温度下测定了样品的平衡等温线．结果表明，镁型蛭石对NH4^ 的交换总量随pH值的变化而波动，在pH值为7时其交换总量为59．32mmol／100g，其选择性随温度的降低而升高，这为蛭石作为一种新型填料提供了一定的理论依据。     

IA-32计算机技术课程的教学方法设计与应用

深圳职业技术学院计算机应用工程系对原微型计算机原理课程进行改革，经过对三届学生的教学实践，将《IA-32计算机技术》课程的教学方法归纳为“一个平衡点、一条主线、四个支撑”，并对这种教学方法的设计思想和应用情况进行了描述。     

城市污染源S0_2扩散规律研究

通过剖析几种常用大气污染物扩散模式,选取合适的大气扩散场参数,建立了适用于郑州市区的污染源SO2扩散模式。用该模式计算市区重点污染源典型月所排SO2浓度,其结果与实际监测结果进行对比分析,对比结果表明,在采暖期和非采暖期两个典型月的相关系数分别为0.727和0.713,达到显著水平。     

跨文化交际中的定型观念

定型观念是影响跨文化交际的一个重要的认知因素，正引起语言学家们的广泛关注。本文探究了定型观念的形式、发展及对跨文化交际的负面影响，并对由此产生的跨文化交际距离及交际中断进行了剖析。     

Parity Nonconservation in of Multiply Dielectronic Recombination Charged Ions

A parity nonconserving （PNC） asymmetry in the cross section for dielectronic recombination of polarized electrons on multiply charged ions with Z≥40 is discussed. This effect is strongly enhanced for close doubly-excited states of opposite parity in the intermediate compound ion. Such states are known for He-like ions. However, these levels have large energy and large radiative widths which hampers observation of the PNC asymmetry. We argue that accidentally degenerate states of more complex ions may be more suitable for the coresponding experiment.     

Experimental Observables on Nuclear Liquid Gas Phase Transition

Progress on nuclear liquid gas phase transition （LGPT） or critical behavior has been simply reviewed and some signals of LGPT in heavy ion collisions, especially in NIMROD data, are focused. These signals include the power-law charge distribution, the largest fluctuation of the fragment observables, the nuclear Zipf law, caloric curve and critical exponent analysis etc.     

Ab initio study of the effects of Ag/Mn doping on the electronic structure of LiFePO_4

Based on density functional theory (DFT) of the first-principle for the cathode materials of lithium ion battery, the electronic structures of Li(Fe1-xMex)PO4 (Me = Ag/Mn, x = 0―0.40) are calculated by plane wave pseudo-potential method using Cambridge serial total energy package (CASTEP) program. The calculated results show that the Fermi level of mixed atoms Fe1-xAgx moves into its conduction bands (CBs) due to the Ag doping. The Li(Fe1-xAgx)PO4 system displays the periodic direct semiconductor characteristic with the increase of Ag-doped concentration. However, for Fe1-xMnx mixed atoms, the Fermi level is pined at the bottom of conduction bands (CBs), which is ascribed to the interaction be-tween Mn(3d) electrons and Fe(4s) electrons. The intensity of the partial density of states (PDOS) near the bottom of CBs becomes stronger with the increase of Mn-doped concentration. The Fermi energy of the Li(Fe1-xMnx)PO4 reaches maximum at x = 0.25, which is consistent with the experimental value of x = 0.20. The whole conduction property of Mn-doped LiFePO4 is superior to that of Ag-doped LiFePO4 cathode material, but the structural stability is reverse.     

放射源应用现状及管理的几点建议

分析了青岛市四方区放射源应用现状,指出了目前放射源管理工作中存在的实际问题,提出了今后放射源管理工作的具体思路和建议。     

浅析不作为犯罪的行为性和作为义务来源

行为是刑法的基础,作为与不作为是犯罪的两种基本形式,不作为的特殊性以及作为义务的主要来源的确定,是认定不作为行为罪与非罪的关键,本文拟就这两个问题作一探讨。     

高精度液压试验台的油温自动控制研究

从降低液压试验台温控系统的成本而又保证温控精度出发，分析影响温控精度提高的主要因素，提出了采用串级双闭环负反馈的温控方案，并应用辨识技术获得了被控对象的较精确的数学模型，通过两级校正，使温控精度达到了５０±１℃。