"白色污染"及废旧塑料的综合治理

介绍“白色污染”的由来和发展现状的同时。对废旧塑料的回收再利用技术和处理方法做了论述,指出根治“白色污染”的主要方向。     

基于Tabu搜索和变区域遗传算法的组卷问题研究

针对目前大型题库中组卷算法效率低的问题，给出了多目标约束条件下的组卷问题数学模型，提出了基于Tabu搜索和变区域遗传算法的TS-CAGA算法。本算法用遗传算法作全局搜索，用禁忌搜索算法作局部搜索，给出了搜索区域动态变化的条件，通过种群规模自适应调整，可以加快收敛速度和避免局部最优化。实验结果表明，算法的组卷效率和选题质量有显著提高。     

大倾角薄煤层综采高效回采工艺实践

结合8241采煤工作面煤层较薄、倾角较大，而且变化频繁、不稳定等特点，通过设备选型和改进液压支架，对大倾角薄煤层综采装备及回采工艺进行实践和探讨，对大倾角支架的防倒、防滑问题提出简单、实用、可靠的解决方法，为薄煤层大倾角综采支架的性能改进提出建设性的意见，取得较好的技术经济效益。     

鼠奇异变形杆菌的鉴别诊断

目的对一株小鼠奇异变形杆菌进行了鉴定,为实验动物细菌检测、鉴别诊断提供参考依据。方法通过培养特性、菌落形态、染色和系列生化试验等检查,对疑似沙门氏菌的小鼠分离菌株进行初步鉴定,并采用血清凝集试验对小鼠分离菌株作进一步鉴定。结果通过表型生物学特性鉴定,并结合血清学诊断鉴别方法,确证该小鼠分离菌株为奇异变形杆菌。结论尽管检出的奇异变形杆菌不是SPF动物所必须排除的病原菌,但仍需指出:该菌为条件致病菌,对实验动物和研究人员均有潜在的危害,对科学实验也可能造成不利影响,故应引起高度重视。     

基于SolidWorks的摆动式生物反应器三维建模与仿真

设计了一种摆动式固态生物反应器,利用SolidWorks软件分别对其主要部件罐体、凸轮、联轴器和轴进行实体建模,在SolidWorks软件中完成虚拟装配、动画制作;应用COSMOSMotion插件对设计的摆动式生物反应器进行运动仿真分析,模拟实际运行状况.仿真表明:生物反应器结构设计合理,凸轮设计的理论值与实际值一致.     

A DNA damage checkpoint response in telomere-initiated senescence

Most human somatic cells can undergo only a limited number of population doublings in vitro. This exhaustion of proliferative potential, called senescence, can be triggered when telomeres--the ends of linear chromosomes-cannot fulfil their normal protective functions. Here we show that senescent human fibroblasts display molecular markers characteristic of cells bearing DNA double-strand breaks. These markers include nuclear foci of phosphorylated histone H2AX and their co-localization with DNA repair and DNA damage checkpoint factors such as 53BP1, MDC1 and NBS1. We also show that senescent cells contain activated forms of the DNA damage checkpoint kinases CHK1 and CHK2. Furthermore, by chromatin immunoprecipitation and whole-genome scanning approaches, we show that the chromosome ends of senescent cells directly contribute to the DNA damage response, and that uncapped telomeres directly associate with many, but not all, DNA damage response proteins. Finally, we show that inactivation of DNA damage checkpoint kinases in senescent cells can restore cell-cycle progression into S phase. Thus, we propose that telomere-initiated senescence reflects a DNA damage checkpoint response that is activated with a direct contribution from dysfunctional telomeres.     

冬小麦春化研究进展

春化作用是某些高等植物成花转变的重要环节，被认为是植物在低温诱导下促使其相关基因的表达，从而导致生理状态转变的一种遗传控制的生理过程。综述了近60多年来有关冬小麦春化的生态、生理生化及分子生物学的研究及最新进展。重点介绍了冬小麦春化生理生化研究历史及现状，并对春化本质进行了探讨。     

Planetary science: constant illumination at the lunar north pole

Images returned by the spacecraft Clementine have been used to produce a quantitative illumination map of the north pole of the Moon, revealing the percentage of time that points on the surface are illuminated during the lunar day. We have used this map to identify areas that are constantly illuminated during a lunar day in summer and which may therefore be in permanent sunlight. All are located on the northern rim of Peary crater, close to the north pole. Permanently sunlit areas represent prime locations for lunar outpost sites as they have abundant solar energy, are relatively benign thermally (when compared with equatorial regions), and are close to permanently shadowed regions that may contain water ice.     

人工免疫系统在遥感信息提取中的应用

为了提取丰富的遥感图像信息,在分析人工免疫系统原理及其模型特点的基础上,结合遥感信息的特点,提出了特异识别原理和克隆选择原理的遥感图像信息提取模型.重点探讨了人工免疫系统在遥感信息提取中的专题信息聚类、信息识别.该系统适用于遥感图像自动识别分类和专题信息提取方面,为遥感信息处理的研究提供了新的理论和技术支持.通过实例验证,用该方法处理后的图像具良好的视觉效果.     

违宪审查模式和我国的违宪审查制度

违宪审查制度是任何一个宪政体制的国家都必不可少的.它将保障公民的各项权利,也是依法治国的题中之意。近代各国采取的违宪审查模式主要有司法机关即法院行使宪法监督权的模式、立法机关行使违宪审查权的模式以及专门的机关行使违宪审查权的模式.我国的违宪审查制度从客观上说实际上尚未建立起来.针对现实可操作性以及实效性进行分析后,笔者认为,在当今中国实行在立法机关即全国人民代表大会下设专门的违宪审查机关的方式较为合理,但其中也涉及有关机关的权限,监督甚至立法机关的权限等问题。