城市污水综合利用中的生物性污染问题

污水综合利用是解决北京水资源短缺的必然选择。文章分析了北京市城市污水处理厂出水生物性污染问题 ,并提出了对城市污水进一步消毒处理的必要性及存在的问题     

紧紧围绕新世纪公安工作需要培养新型高素质预备警官

适应新世纪警务工作的需要 ,建设高素质公安队伍 ,关键在教育。针对青年的思想实际 ,抓住思想政治工作生命线 ,坚定不移地走政治建校道路 ,培养学生坚定的政治思想素质 ;贴近公安工作实践 ,紧紧瞄准实战需要 ,培养学生过硬的公安业务素质 ;强化警体技能和实战技能训练 ,锻造学生强健的体魄和过硬的自卫擒敌本领 ;加强科学文化素质教育 ,培养具有广博知识面、良好人文精神和博大人文胸怀的新型现代警官     

The Butterfly Effect and the Making of 'Ping-Pong Diplomacy'

With the aid of the 'butterfly effect' theory, this article investigates the role of ordinary individuals, both Chinese and American, in the formulation, implementation and promotion of 'Ping Pong Diplomacy', which brought about the US‐China rapprochement in the early 1970s. Through examining the twists and turns in the process of 'Ping Pong Diplomacy' making, this study intends to bring one's attention to a number of seemingly less significant historical episodes and their long-term impact on US‐China relations. Like small butterflies whose spontaneous actions can generate unexpected climatic changes, the various individuals in this study, including players and officials of the table-tennis teams, low-ranking diplomats and journalists, played an indispensable part in bringing forth a dramatic transformation in US‐China relations, which in turn altered the Cold War climate in general.     

骨骼肌circRNA在死亡时间推断中的初步筛选及验证研究

目的通过构建骨骼肌中环状RNA(circular RNA,circRNA)表达谱,筛选出人体骨骼肌中与死亡时间具有时序性变化的circRNAs,并对筛选出的circRNAs进行验证,进而探讨其相对表达量与死亡时间的相关性。方法芯片实验选取2例外界温度、湿度相对一致,已知死亡时间在24 h内的个体,分别于尸检即刻(12 h以内)、3、5、7、10 d各取50 g组织进行总RNA提取,并进行逆转录、探针标记、基因芯片检测等实验,初步得到circRNA表达谱;对筛选出的circRNAs在后续收集的18例检材中进行验证,对所得数据进行统计分析。结果骨骼肌组织中共检测出13 156个circRNAs,但在10 d内整体呈下降趋势的circRNAs只有hsa_circ₀001727、hsa_circ₀001136、hsa_circ₀001871、hsa_circ₀005251、hsa_circ₀     

加强企业道德建设构建文明和谐企业

企业道德建设的根本使命是提高企业道德素质,塑造企业职工的道德灵魂,它在企业的文明和谐建设中具有重要的规范和引导作用.在构建和谐企业中发挥企业道德的作用,必须加强对企业道德建设的组织领导,充分调动企业员工参与企业道德建设的积极性,积极营造有利于企业道德建设的良好氛围,深入开展群众性的职工道德实践活动,广泛开展以"八荣八耻"为核心的社会主义荣辱观教育,大力倡导并促进员工自我加强道德修养,开展形式多样的道德教育,注意加强企业的道德典章建设,善于从人们的传统习惯入手搞企业道德建设.     

新世纪新阶段军队思想政治教育的基本遵循——学习胡主席关于思想政治教育一系列重要指示

胡主席着眼新世纪新阶段我军肩负的历史使命和内外环境的深刻变化,对军队加强和改进思想政治教育作出了一系列重要指示,深刻揭示了新形势下思想政治教育的特点和规律,是新的历史条件下我军做好思想政治教育工作的基本依据和遵循。认真学习和落实胡主席的重要指示,对于做好新世纪新阶段军队思想政治教育工作,确保党从思想上政治上牢牢掌握部队,激励全军官兵有效履行职能使命,具有十分重要的意义。     

Analysis of sensitivity and specificity: precise recognition of neutrophils during regeneration of contused skeletal muscle in rats

In this report, we applied the TissueFAXS 200 digital pathological analysis system to rapidly and accurately identify neutrophils during regeneration of contused skeletal muscle, and to provide information for follow-up studies on neutrophils to estimate wound age. Rat injury model was established, and skeletal muscle samples were obtained from the control group and contusion groups at 1, 1.5, 2, 3, 4, and 6 h, as well as at 1, 3, 5, and 15 d post-injury (n = 5 per group). The expression of nuclei and neutrophils was detected by hematoxylin and eosin (HE) staining and immunohistochemical (IHC) staining. A total of 20 injury site areas of 0.25 mm² (0.5 mm × 0.5 mm) were then randomly selected at all time points. A TissueFAXS 200 digital pathological analysis system was used to identify the positive and negative numbers. Knowledge of five professional medical workers were considered the gold standard to measure the false positive rate (FPR), false negative rate (FNR), sensitivity, specificity, and area under the curve (AUC) of receiver operating characteristic (ROC) curves. As a result, with a staining area of neutrophils from 8 µm² to 15 µm², the FPR was 4.28%–12.14%, the FNR was 12.42%–64.08%, the sensitivity was 35.92%–87.58%, the specificity was 87.86%–95.72%, the Youden index was 0.316–0.754, the accuracy was 82.80%–88.30%, and the AUC was 0.771–0.826. The AUC was largest when the cut-off value of the staining area was 12 µm². Our results show that this software-based method is more accurate than the human eye in evaluating neutrophil infiltration. Based on the sensitivity and specificity, neutrophils can be accurately identified during regeneration of contused skeletal muscle. The TissueFAXS 200 digital pathological analysis system can also be used to optimize conditions for different cell types under various injury conditions to determine the optimal cut-off value of the staining area and provide optimal conditions for further study. Furthermore, it will provide evidence for forensic pathology cases.     

达尔富尔问题的经济根源

达尔富尔位于苏丹的西部,面积约为50万平方公里,占苏丹总面积的1／5,北邻利比亚,西与乍得接壤。达尔富尔境内约有80多个民族,人口估计有777万,占全国总人口的20％,其中约有60％是以耕种为生的农民,主要是富尔人,而其他族群则主要是游牧或半游牧的农民。达尔富尔的北部是热带沙漠气候,向南逐步过渡为热带草原气候（或称萨瓦纳气候）,降雨量也是自北向南递增,其中土壤最肥沃、     

世界经济指标

表1:2000—2007年世界主要国家和地区服务贸易变化情况进出口国家或地区出口额年增长率进口额年增长率20072000-07200120022003200420052006200720072000-072001200220032004200520062007亿美元%亿美元%世界32600120715201212183060011151419111116北美53307-425131191344007-1     

教育的宪法学解读

教育事关公民素养的生成、国家科学技术的发达;其对于国家、社会,乃至公民个人意义重大,并早已成为宪法所关注的事项之一.各国宪法就教育问题从受教育权、教育自由、家庭教育、宗教教育、义务教育、政府责任等不同方面予以规定.尽管涉及的角度不同,但从宪法学视角上看,教育的意义在于它既是政府的一项责任,同时也是公民的一项自由.