流言的流变:SARS舆情的传播学分析

无论是对于传媒管理、还是对于社会与政治变革而言,SARS危机事件中的流言传播现象都是一个难得的研究样本。舆论的进程及相关的跨学科调查表明:流言生成于主流传媒的缺位,平息于民众信息权力的恢复;在流言的最初阶段,存在着属于中产阶层的敏感人群,这意味着传播管理有可能采取更有针对性的对策;流言传播对于“道听途说”的明显的信道依赖,表明了流言在信息封锁之中更可能演变为谣言和谎言,更为重要的趋势是,新媒介在流言传播中的作用已日益显著。     

社会主义和谐社会理论是科学社会主义理论的传承与发展

构建社会主义和谐社会,把马克思主义对社会主义发展的美好理想和愿景变成科学的理论与实践,丰富和发展了党的建设中国特色社会主义的理论。本文从社会主义和谐社会的价值取向、根本任务、总体布局、党的执政方略以及社会发展模式和社会管理手段等五个方面论述了社会主义和谐社会理论对科学社会主义理论的传承与发展。     

Quantitative Risk Assessment of FMD Virus Transmission via Water

Foot-and-mouth disease (FMD) is a viral disease of domesticated and wild cloven-hoofed animals. FMD virus is known to spread by direct contact between infected and susceptible animals, by animal products such as meat and milk, by the airborne route, and mechanical transfer on people, wild animals, birds, and by vehicles. During the outbreak of 2001 in the Netherlands, milk from dairy cattle was illegally discharged into the sewerage as a consequence of transport prohibition. This may lead to contaminated discharges of biologically treated and raw sewage in surface water that is given to cattle to drink. The objective of the present study was to assess the probability of infecting dairy cows that were drinking FMD virus contaminated surface water due to illegal discharges of contaminated milk. So, the following data were collected from literature: FMD virus inactivation in aqueous environments, FMD virus concentrations in milk, dilution in sewage water, virus removal by sewage treatment, dilution in surface water, water consumption of cows, size of a herd in a meadow, and dose-response data for ingested FMD virus by cattle. In the case of 1.6 x 10(2) FMD virus per milliliter in milk and discharge of treated sewage in surface water, the probability of infecting a herd of cows was estimated to be 3.3 x 10(-7) to 8.5 x 10(-5), dependent on dilution in the receiving surface water. In the case of discharge of raw sewage, all probabilities of infection were 100 times higher. In the case of little dilution in small rivers, the high level of 8.5 x 10(-3) is reached. For 10(4) times higher FMD virus concentrations in milk, the probabilities of infecting a herd of cows are high in the case of discharge of treated sewage (3.3 x 10(-3) to 5.7 x 10(-1)) and very high in the case of discharge of raw sewage (0.28-1.0). It can be concluded that illegal and uncontrolled discharges of contaminated milk into the sewerage system may lead to high risks to other cattle farms at 6-50 km distance of the location of discharge within one day. This clearly underlines current measures that prohibit such discharges, and also asks for strict control. This risk assessment clearly demonstrated the potential significance of FMD virus transmission via water, and the results will be useful on an international scale, and could also serve as a basis for other FMD risk-assessment models.     

中国古代文论兴感论的承传

我国古代文论兴感论的承传,主要体现在三条线索中:一是物感论维面的承传;二是兴会论维面的承传;三是“兴”与“感”相结合论维面的承传。古代文论兴感论的承传轨迹,呈现出梯度拓展、充实和不断深化的特征。     

双通道图像／数据传输系统

叙述了基于电视逆程数据插入技术的双通道图像／数据传输系统的设计及关键技术。该系统以电视信号为媒介，无需增加新的信道设备即可将模拟电视通道拓展为模拟／数字兼容通道，可提供传输速率达８６．４ｋｂ／ｓ的高速数据传输。系统性能可靠、传输速率快、纠错能力强，具有广阔的应用前景。     

产出与经济效益的相应关系研究

在文献[1～4]的基础上,进一步提出产出-完全经济效益传递系数、贡献系数和受益系数,以揭示产出与经济效益的相互联系和数量关系,并在此基础上提出了提高各部门经济效益的主要途径。     

再入等离子体鞘套中电磁波Helmholtz方程的近似解

本文以样条函数(spline function)作为电磁波Helmholtz方程的近似解,求解了等离子体鞘套的反射系数和透射系数。本文采用的样条函数法具有数学推导和数字计算简单,可适用于任意电子浓度分布的优点,并且计算结果与美国RAM C系列飞行实测数据吻合得比较好。同时,本方法还可用于求解其它不均匀介质中的电波传播问题。     

金融创新对货币政策传导的影响

货币政策要发挥作用,必须通过其传导机制来实现.金融创新的不断发展大大削弱了传统的货币政策传导机制的理论基础,使货币政策传导需要考虑的因素多元化,传导途径变得复杂化,基于此,提出了货币政策传导机制的分析框架,探讨了金融创新对货币政策传导渠道中的各个要素的影响,指出金融创新改变每种传导渠道的相对重要性,使货币政策传导同时受到加强和削弱的效果,即金融创新对货币政策传导的影响具有非平衡性.     

螺旋天线宽带阻抗匹配技术的研究

介绍了一种用渐变镜像传输线阻抗变换器来实现螺旋天线与50Ω馈线之间的宽带匹配技术.实验结果表明,采用渐变镜像传输线阻抗变换器能在2:1的频带范围内实现 ρ<2.     

从历代艺术表演形式看《史记》的传播与接受

歌舞表演、说话艺术、杂扮问答、戏剧演出是《史记》传播的四种主要艺术形式。以艺术表演方式传播《史记》呈现出雅俗共赏、与时变迁的特点。艺人们的表演还原、改造《史记》人物、故事,使《史记》更接近人民生活,取得接受者的心理认同,也使《史记》垂诫后世的理性精神得以传承,并以寓教于乐的方式给接受者以文化陶冶。