关注生物多样性及生物多样性的保护

地球是太阳系八（或九）大行星中最为璀璨和美丽的星球。地球之美在于生命之美,在于数百万种生物的繁衍生息、协同进化、欣欣向荣所演绎出来的各种生命奇迹。然而,随着人口的急剧增长和人类对自然资源的无节制开发利用,地球上的很多生物正在遭受灭种之灾。据比较保守的估计,全世界每年至少有5万种生物物种灭绝,平均每天灭绝的物种便达140个之多,要不了多久,全世界野生生物物种灭绝的数量将达到其总数的15％～30％,那将是一场十分可怕的灾难!     

Crucial control measures to contain China's first Delta variant outbreak

The SARS-CoV-2 B.1.617.2 (Delta) variant flared up in late May in Guangzhou, China. Transmission characteristics of Delta variant were analysed for 153 confirmed cases and two complete transmission chains with seven generations were fully presented. A rapid transmission occurred in five generations within 10 days. The basic reproduction number (R₀) was 3.60 (95% confidence interval: 2.50–5.30). After redefining the concept of close contact, the proportion of confirmed cases discovered from close contacts increased from 43% to 100%. With the usage of a yellow health code, the potential exposed individuals were self-motivated to take a nucleic acid test and regained public access with a negative testing result. Facing the massive requirement of screening, novel facilities like makeshift inflatable laboratories were promptly set up as a vital supplement and 17 cases were found, with 1 pre-symptomatic. The dynamic adjustment of these three interventions resulted in the decline of Rt from 5.00 to 1.00 within 9 days. By breaking the transmission chain and eliminating the transmission source through extending the scope of the close-contact tracing, health-code usage and mass testing, the Guangzhou Delta epidemic was effectively contained.     

试论我国内资银行监管

近年来银行业以及相关的金融业层出不穷的大案要案,为了加强我国银行的国际竞争力,配合我国金融体制改革的进程,加强我国银行的监管刻不容缓。从分析我国银行监管的传统手段入手,分析其中存在的问题,并且结合巴塞尔协议的一般做法,试图得出一些有益的结论。     

常见反馈环计算方法的比较

反馈环计算是系统动力学模型分析的基础。针对这一问题,本文从SD模型的规模和算法时间复杂度两方面比较了几种常见的反馈环计算方法,分析了反馈环图示计算法、行列式算法、矩阵算法和强核图论算法各自的特点,为在处理问题时算法的选择提供了依据。在算法时间复杂度方面,矩阵算法优于其它算法,适合于SD模型规模较大的计算。     

浅谈如何加强大学生诚信教育

诚信是中华民族的传统美德,是高校素质教育的重要内容。当代大学生是国家未来的建设者和接班人,他们的诚信状况不仅直接关系到我国社会主义现代化建设的顺利进行,更关系到社会主义和谐社会的构建。文章介绍了诚信的基本内涵,指出了现代大学生的诚信现状,并提出了若干对策。     

基于Web的图书馆知识管理平台与模型研究

论述了图书馆知识管理内容,分析了隐性知识的管理方法,提出了图书馆知识管理的平台和系统模型,以及知识管理平台运行过程,并说明了图书馆知识管理模型系统模型中各个层次的相应功能.     

数字资源整合服务现状及发展趋势

综述了数字资源服务商提供的数字资源整合服务和图书馆提供的数字资源整合服务现状,论述了数字资源整合服务发展的趋势。     

Mechanistic connotations of restriction of intramolecular motions (RIM)

Molecules are all in constant motions,which influence their properties.For ex-ample,in photophysics,the light emis-sion behavior of a luminogen is de-termined b...