摇摆状态一维相控阵天线波束指向修正

由于载机平台摇摆,一维相控阵天线姿态会发生倾斜,从而影响波束指向。为此,提出了一 种修正方法,给出了适应于各种监视雷达系统（如二次航管系统）工作原理的详细修正流程 及算法。试验结果表明,所提方法使 天线能维持高指向精度。     

改革分子生物学实验教学,提高学生综合能力

针对中南林业科技大学分子生物学实验教学的现状,从教学内容、教学方法、考核方式三个方面进行了改革,实验教学水平和教学质量明显提高,学生综合实验能力大大增强。     

汉语介词话题标记研究

本文描写了汉语介词话题标记类型.并对各种类型进行了对比研究.本文还指出了各种介词话题标记的功能与使用制约因素,描写了各种介词话题标记在使用上出现的频率差异并对出现这种差异的原因做了解释.     

一种提高二次雷达测距精度的方法

测距精度决定了二次雷达系统的目标分辨能力。针对现有二次雷达测距算法测距精度低的问题，分析了二次雷达的测距原理和引入的误差，提出了改进的自适应测距方法。在不更改二次雷达信号格式和硬件设计的前提下，采用分布式处理方式，使询问机和应答机能自动周期性测试本机内部延时，并在询问应答过程中自动分别扣除本设备的内部延时，从而提高二次雷达系统的测距精度。     

湿地植物小叶章SSR引物筛选及反应体系优化

开引物发合适的小叶章PCR-SSR引物并建立优化的反应体系是开展小叶章遗传多样性研究的基础。利用正价设计方法对小叶章SSR反应体系中的DNA模板和引物2个反应因素进行了9个水平的优化,并通过温度梯度优化引物退火温度。自主开发了51对小叶章SSR引物,筛选出12对扩增条带清晰、多态性丰富的SSR引物,为小叶章遗传多样性研究提供方法和理论依据。     

Disentangling Effacement,Omnivore, and Distinction Effects on the Consumption of Cultural Activities: An Illustration

Recent studies of cultural activities in America have stressed the importance of three sorts of phenomena: (1) a boundary-effacement effect in which members of different classes are to some degree homogeneous in their preferences (colloquially, some things are liked or disliked by everybody); (2) an omnivore effect in which upscale people tend more than their more downscale counterparts to engage in or appreciate a broad variety of cultural activities (some people like everything); and (3) a distinction effect in which more upscale consumers use certain cultural habits as a way of marking their status-related differences from more downscale people (different people from different backgrounds like different things to different degrees). However, in arguing for one or another of these three phenomena and often favoring just one perspective over the others, various authors have tended to lose sight of how the three effects may operate simultaneously. We address the resulting confusion by proposing a simple conceptual schema that embraces all three phenomena in a manner not heretofore recognized and by providing an illustration of how we might disentangle these three effects in an empirical analysis of cultural activities.     

水处理行业的聚合物分散剂的发展现状和研究方向

简述了我国水处理行业现阶段使用的聚合物分散剂的发展现状和研究方向,并对此进行了讨论,就其发展方向提出了作者自己的观点.     

无粘结剂分子筛的制备技术

本文介绍了无粘结剂分子筛的制备技术及其特点,并对不同制备方法进行了分析对比,提出了适合我国发展的优势和方向。     

Community governance

American politics, especially at the national level, has become dysfunctional; citizens are deeply frustrated with their political leaders and feel that political institutions are unresponsive and corrupted by entrenched power and money. Government leaders must bear the brunt of this anger and distrust, and subsequently feel a sense of disconnection between themselves and those whom they serve. Ironically, at the same time as the ability of local government to solve problems is severely hindered due to this ‘disconnect,' devolution at the federal and state level is forcing local government to take more and more responsibility for resolving local challenges. This essay argues that the solution to this impasse lies in re-inventing the way communities operate—we need to make a shift from government to governance. The dominant model of local politics, which fit the political landscape of the 1940s–1970s, vested decision making authority solely with governmental leadership; citizens voted and governors governed. This essay describes a new mode of operation, one where non-governmental actors are ‘granted a seat at the table.' In this model the goal of political struggles is no longer to defeat your enemy, but to reach collaborative, consensus-based decisions; government, business, community groups and citizens work together; and leaders share power, working to enable others to decide issues.     

新型生物脱氮途径-厌氧氨氧化研究进展

综述了厌氧氨氧化的反应机理,厌氧氨氧化菌的生活环境,应用于厌氧氨氧化的分子生态学技术,影响厌氧氨氧化过程的因素,以及氮在自然界的全循环途径,展望了厌氧氨氧化的发展趋势。