张北试区降水规律与防沙尘暴对策

本文明确了以张北为代表的坝上地区年降水量分布符合正态分布,其长期变化趋势存在20年的周期,有89.97％的年份年降水量≥300mm;月降水量高度集中且变异系数小,一年中70％的降水量集中在6、7、8三个月。在明确降水规律的基础上提出5项防沙尘暴对策。     

论网络环境下的隐私权保护

文章通过论述网络隐私权的性质、由来、侵权行为的表现极其特征,从理论、法律和实践的视角探 讨网络隐私权保护问题。     

Proteomic analysis of human umbilical vein endothelial cells exposed to PM<Subscript>2.5</Subscript>

Exposure to fine ambient particulate matter (PM_2.5) is known to be associated with cardiovascular disease. To uncover the molecular mechanisms involved in cardiovascular toxicity of PM_2.5, we investigated alterations in the protein profile of human umbilical vein endothelial cells (HUVECs) treated with PM_2.5 using two-dimensional electrophoresis in conjunction with mass spectrometry (MS). A total of 31 protein spots were selected as differentially expressed proteins and identified by matrix-assisted laser desorption/ionization-time of flight (MALDI-TOF) MS. The results demonstrated that DNA damage and cell apoptosis are important factors contributing to PM_2.5-mediated toxicity in HUVECs. It is further proposed that PM_2.5 can inhibit superoxide dismutase (SOD) activity and increase reactive oxygen species (ROS) and malonaldehyde (MDA) production in a concentration-dependent manner. Induction of apoptosis and DNA damage through oxidative stress pathways may be one of the key toxicological events occurring in HUVECs under PM_2.5 stress. These results indicated that the toxic mechanisms of PM_2.5 on cardiovascular disease are related to endothelial dysfunction.     

现代家庭经济活动的资源约束与新经济人假定

在市场经济条件下，家庭是一个集生产、投产和消费为一体的微观经济主体，家庭的这些经济活动要耗用大量的资源，包括人力资源、物质资源和时间资源。然而资源总是有限的，存在一个配置效益问题。这样，如何合理使用资源以使家庭获得的效用达到最大，这便成为家庭经济行为合理化的一个重要命题，也是直接影响整个国民经济效果的重要因素。     

试析素质教育之现状与对策

素质教育是我国教育事业发展的一项基本国策，但是，素质教育的现状使其演化为“一张成绩通知单”，这些情况让我们对教育的生存与发展充满忧与思。找出素质教育实施的问题，寻觅素质教育深化的对策，应当成为我们教育界共同的课题。     

短跗星花金龟体表元素的X射线荧光光谱检测

采用Ｘ射线荧光光谱仪对体表为古铜色并有金属光泽的短跗星花金龟进行了体表（背、腹面）无损多元素定性检测。样品灰化后，对其灰又进行了多元素定性检测。结果发现，此种金龟子体表所呈现的金属光泽与虫体含有较多的Ｃｕ、Ｚｎ有关。     

ON THE REE ACROSS THE PERMIANTRIASSIC BOUNDARY IN SOUTH CHINA

This paper discusses the INAA results of REE in clays atand near some Permian/Triassic boundaries of South China.It showsthat the REE patterns of boundary clays differ from those of non-boundary clays.One difference is that the boundary clays are moreenriched in LREE,with steeper slope of REE and a smaller Eu nega-tive anomaly than the non-boundary clays.Another difference is that theboundary clays show a small Ce negative anomaly,but no Ce anomalyoccurs in the non-boundary clays.From these REE patterns and some other experimental facts,it isproposed that the P/T boundary clay may be a mixed product consistingof the acidic-intermediate ash and the upper crust substance representingsputtering component,and the calculated fraction of the former andlatter is 7/3.     

Boosting the Development of CAS Botanical Gardens

CAS is to initiate a 150-millionyuan (about US $18 million) project to boost the development of its network of botanical gardens throughout the country.     

国外信息技术政策、应用现状及对我国的启示

从2004年全球NRI指数排行入手,通过全球信息技术实力对比分析出我国目前处于信息技术实力的相对落后状态,在深入分析美国、芬兰、韩国、德国和法国等信息技术相对实力较强的国家的信息技术政策、战略,政府作用以及实践经验之后,得出了我国进一步发展和应用信息技术的几点启示。     

智力资本度量的记分卡方法评述

知识经济时代,企业的价值关键在于其拥有的智力资本,对智力资本实施有效的管理对于企业建立持久的竞争优势至关重要。但智力资本的管理离不开对智力资本的度量,只有明确企业现有智力资本存量的基础上,才可能真正地对智力资本实施有效的管理。本文简单介绍了一类智力资本度量方法——记分卡方法中各个模型的基本思路和使用方法。