溶液再生式蒸发冷凝器运行参数对系统性能的影响

为了充分回收低品位的冷凝热,提出了以溶液再生式蒸发冷凝器为纽带的复合式空调系统.建立了溶液再生式蒸发冷凝器内部热质传递的数学模型,回归总结了空气与液膜之间传质系数的经验关系式,并进行模型验证,研究了内部运行参数对溶液再生量、系统制冷量及电力性能系数的影响,进而寻找到其最佳范围以优化系统运行.采用Matlab程序的计算结果表明:空气的迎面风速、进口含湿量以及溶液的质量流速、进口质量分数对系统性能影响较大;较低的空气进口含湿量有利于复合式空调系统运行;最佳的迎面风速为2.63～2.87 m/s,溶液质量流速为1.95～2.35 kg/(m2.s),溶液进口质量分数为23.2%～24.2%.     

New Voronoi Diagram Algorithm of Multiply-Connected Planar Areas in the Selective Laser Melting

This paper studies the practical generation of Voronoi diagrams for multiply-connected planar areas bounded by line segments. The core of the algorithm was calculating Voronoi polygon of every Voronoi object in planar areas independently. The main approach had two steps. The first step was calculating all relevant bisectors of every Voronoi object. The second was combining obtained bisectors into completed Voronoi polygons individually. All code was implemented in Visual C++ platform. The resulting code was extensively tested in real-world data and its practical running time grew only linearly. Three statistical CPU-consumption charts had been drawn with the Voronoi diagrams computation data, and compared with other published codes for computing Voronoi diagrams. The algorithm was applied to compute offsetting of slice area consisting of large-scale line segments for the selective laser melting (SLM) trajectory scanning technology which is a kind of rapid prototyping (RP). The experimental results of offsetting for slice area based on Voronoi diagrams show that the approach is effective and simple for polygon offsetting problems. The method is helpful to those offsetting work and can provide more effective offsetting solution.     

德国犯罪支配理论的现实思考

德国刑法理论中犯罪支配说是关于正犯与共犯区分的通说,该说以是否存在对共同犯罪的实际控制为立足点对正犯和共犯进行区分,这成为大陆法系国家刑事立法和司法借鉴的范本。该理论应当引入我国刑事司法之中,以解决我国司法实践主从犯难以区分的困境。     

基于委托代理理论的突破性创新激励机制研究

提出了创新刺激机制的框架,将"歹徒问题"嵌入代理人模型,研究突破性创新和渐进性创新的刺激机制.研究发现:执行突破性创新的最优契约对长期成功而非短期成功进行奖励,甚至可能对短期失败进行奖励.此外,突破性创新激励机制还包括持续坚持长期刺激计划,对工作表现进行及时反馈.具体措施包括"黄金降落伞"、管理防御,有利于债务人的破产法律保护等.     

论给排水施工常见问题及其应对措施

以给排水施工为研究对象,分析了给排水施工中给排水管道渗漏、给排水管道堵塞以及给排水供水水压不足等常见问题,提出了应对措施,并阐述了做好给排水施工质量控制工作在进一步提高整个建筑工程项目建设质量与建设效率的过程中具有重要的作用与意义。     

通用简易中文文本压缩方法研究

该文把GB2312-80的汉字转换为从0至6767的短整型数，这些短整型数据有一个共同的存储特点：它们的2字节中的高3位（称为冗余位）皆为0。删除冗余位而重组其余位即可形成压缩文本。这种压缩方法显然是简单、快捷、容量实现和对GB2312-80汉字是普遍适用的。     

李共形代数与共形模

探讨了李共形代数和形式分布李代数两者之间的关系.从而可由形式分布李代数(g,F)得到李共形代数Conf(g,F);反之,可由李共形代数A得到形式分布李代数(LleA,A).此外,通过对李共形代数A的共形模M作用,构造了相应李代数LieA的模V(M),为李共形代数的表示论在研究无限维李代数的表示论中的运用奠定了基础.同时对Vimsom共形代数在 [ ]上自由且秩为1的共形模进行了分类.     

电子测量实验教学改革探索

从电子测量的发展趋势和衡阳师范学院电子测量实验教学的现状出发,针对原有实验教学存在的问题,提出了《电子测量》实验教学改革的具体思路：重应用-以实际应用为目的;强基础-牢固掌握仪器的原理;拓思路-灵活运用测量原理和方法;新内容-现代化内容贯穿全部实验内容;多手段-新的实验手段。     

Ancient DNA sequences of rice from the low Yangtze reveal significant genotypic divergence

Rice (Oryza sativa) was first domesticated in the lower and middle Yangtze regions of China, and rice remains have been found in many Chinese archaeological sites. Until now, only phenotypic archeobotanical evidence, such as the spikelet bases of ancient grains, has been used to speculate on the domestication process and domestication rate of rice. In this study, we sequenced 4 genomic segments from rice remains in Tianluoshan, a site of the local Hemudu Neolithic culture in the low Yangtze and two other archaeological sites (~2400 and 1200 BC, respectively). We compared our sequences with those of the current domesticated and wild rice (O. rufipogon) populations. At least two genotypes were found in the remains from each site, suggesting a heterozygotic state of the rice seeds. One ancient genotype was not found in the current domesticated population and might have been lost. The rice remains belonged to the japonica group, and most if not all were japonica-type, suggesting that the remains might be at an early stage of indica-japonica divergence or an indica-japonica mixture. We also identified sequences with significant similarity to those from species of Sapindales, Zygophyllales, and Brassicales, which is consistent with the identification of other plant remains in the Tianluoshan site and the common rice field weeds such as mustards in southern China.     

基于{V_8O_(24)}~(8-)阴离子簇的一维Zn(Ⅱ)配合物的合成及晶体结构

利用水热合成技术,合成了1个基于{V8O24}8-阴离子簇的Zn(Ⅱ)配合物[Zn2(Hdpa)3]2V8O24(dpa=2,2′-dipyridylamine),通过X-射线单晶和粉末衍射、红外光谱和热重-差热分析手段进行了表征.单晶X-射线衍射分析表明化合物是由2种不同的阳离子片段([Zn(dpa)2]2+和[Zn(dpa)]2+)连接{V8O24}8-阴离子簇形成的1D带状结构,其中{V8O24}8-阴离子簇展示了清晰的椅式构型,2个[Zn(dpa)]2+单元分别被支撑在椅式构型的两侧.