Mn对SrTiO3基电容—压敏陶瓷非线性系数的影响

介绍了ＳｒＴｉＯ３基电容－压敏陶瓷研究的国内外进展，从理论和实验出发研究了Ｍｎ对ＳｒＴｉＯ３基电容－压敏陶瓷非线性系数的影响，并得到了一些有益的结论。     

二阶三点共振边值问题的多重解

该文研究二阶三点共振边值问题ｘ″＋ ｆ（ｔ，ｘ，ｘ′） ＝ ｓ，ｘ（０） ＝ ｘ（η） ，ｘ′（１） ＝ ０（０ ＜ η＜ １） 的多重解的存在性，这里ｓ 是参数。所使用的方法是ＬｅｒａｙＳｃｈａｕｄｅｒ 连续定理以及上下解方法。     

高速公路智能化监控系统构成及功能

介绍一种智能化的高速公路交通监控系统的构成 ;交通监控系统作为高速公路管理的必要手段 ,在我国部分经济发达的省份正得到大力发展 ,本方案作为系统的满足交通控制策略的硬件设备组成讨论及设计 ,具有一定的实用性     

水利工程前期工程规模的初选

水利工程前期工作中工程规模的选择，以前往往是在几个方案中选择一个合理、可行的方案进行规划设计，最后才进行其经济效益的分析，确定其经济性、合理性，使前期工作可能出现反复，既浪费时间，又增加了前期工作的投入，同时不能为工程决策提供超前的依据，采用规模一投入，规模－效益曲线分析法，可以较准确地把工程规模确定合理的状态（况下）然后再进行工程可行性研究及初步设计工作。     

丙烯在镍离子高分散催化剂上反应过程的TPSR EPR XPS UV-DRS研究

用ＴＰＳＲ法对丙烯在硫酸镍高分散型催化剂上反应过程进行考察；用ＮＨ３－ＴＰＤ法对ＮＨ３吸附中心进行跟踪，发现除强弱两类酸中心外，确有第三类活性中心，此第三类活性中心可能就是配位催化活性中心。     

走出语文字词教学的误区

本文从中学语文字词教学的重要性和现状的分析入手，联系教育学、心理学、语言学的有关理论，指出语文字词 教学在教学观念、词语表达作用的教学、语义的宏观规定性与个人主观心理关系、语义与语境的关系的处理等方 面步入了误区；认为提高语文字词教学质量的关键是教师要加强自身语言修养，认真研究中学生心理，不懈追求 教学艺术，在教学中培养学生的创造性思维能力和良好的阅读习惯。     

不同水/表面活性剂比的微乳液制备纳米Ni-Fe复合微粒的组成和粒径分布

用X－射线衍射（XRD）和透射电子显微镜（TEM）等研究了不同水／表面活性剂（[W]/[S]）比的微乳液制备纳米Ni-Fe复合微粒的组成和粒径分布，结果表明，([W]/[S]）比值不同，得到的Ni-Fe复合物微粒不但粒径不同，而产物的组成也有差异，当([W]/[S]）＞240时，微粒粒径最小，但组成复杂；当([W]/[S]）＜198时，微粒粒径呈寺大，但组成较单一，且可得到Ni-Fe合金相，各样品磁参数的测量表明，当将Ni-Fe组分总量规一化时，发现随Ni/Fe比增加，磁参数减小。     

颞下颌关节音的分形分析

颞下颌关节（ＴＭＪ）是人体最复杂的关节之一，有着复杂的生理功能。颞下颌关节音（颚开合时ＴＭＪ产生的声音）含有丰富的有关ＴＭＪ状态的信息，本文利用非线性动力学的混沌与分形理论对健康人和颞下颌关节内紊乱（ＴＭＪＩＤ）患者的颞下颌关节音信号进行了分析。结果表明，鄂开合时ＴＭＪ产生的振动是一种复杂的混沌振动，由此产生的颞下颌关节音信号具有分形结构，其维数为分数，且健康人颞下颌关节音信号的相关维数值明显高于     

A family of mammalian Na+-dependent L-ascorbic acid transporters.

Vitamin C (L-ascorbic acid) is essential for many enzymatic reactions, in which it serves to maintain prosthetic metal ions in their reduced forms (for example, Fe2+, Cu+), and for scavenging free radicals in order to protect tissues from oxidative damage. The facilitative sugar transporters of the GLUT type can transport the oxidized form of the vitamin, dehydroascorbic acid, but these transporters are unlikely to allow significant physiological amounts of vitamin C to be taken up in the presence of normal glucose concentrations, because the vitamin is present in plasma essentially only in its reduced form. Here we describe the isolation of two L-ascorbic acid transporters, SVCT1 and SVCT2, from rat complementary DNA libraries, as the first step in investigating the importance of L-ascorbic acid transport in regulating the supply and metabolism of vitamin C. We find that SVCT1 and SVCT2 each mediate concentrative, high-affinity L-ascorbic acid transport that is stereospecific and is driven by the Na+ electrochemical gradient. Despite their close sequence homology and similar functions, the two isoforms of the transporter are discretely distributed: SVCT1 is mainly confined to epithelial systems (intestine, kidney, liver), whereas SVCT2 serves a host of metabolically active cells and specialized tissues in the brain, eye and other organs.     

Novel compound specified in dune reed (Phragmites communis Trin.) and its possible role as a protectant on the chloroplasts under stress

A small solute has been obtained with column chromatography, which only exists and accumulates in the leaves of dune reed in northwest China's desert region. Its unique polyamine and aromatic features are quite different from those well-known ones accumulated under stresses. The natural quantity of the solute is strikingly proportional to the level of local high temperature, and a large section is distributed in the photosynthetic chloroplasts. Under lab conditions, we have proved that the solute plays a role in protecting or conserving chloroplasts under heat stress. So it is reasonable to suppose that the high resistance of dune reed to environmental high temperature and/or drought is at least partially due to the accumulation of this unique solute.