双手第1骨间背侧肌代谢物的氢质子磁共振波谱

目的 探讨氢质子磁共振波谱（1H-magnetic resonance spectroscopy,1H-MRS）检测技术在尺神经损伤预后评估的应用前景.方法 对12例健康青年志愿者、1例尺神经完全损伤者双手第1骨间背侧肌的代谢物进行1H-MRS检测,对采集到的数据进行统计分析. 结果 健康女性成年人第1骨间背侧肌的细胞外脂质（extra-myocellular lipids,EMCL）峰下面积高于男性（P＜0.05）,胆碱、肌酸、细胞内脂质（intra-myocellular lipids,IMCL）在两性间差异均无统计学意义（P＞0.05）,双手间各峰下面积差异均无统计学意义（P＞0.05）.尺神经损伤者患侧EMCL峰较健侧偏高,且FDI面积缩小.结论 1H-MRS对肌肉代谢物的无创性以及定量检测对周围神经损伤的预后评估具有一定价值.     

公民参与:和谐时代的公共政策机制

公民参与是指公民直接介入管理和公共政策过程。保障公民的参与权成为人们日益关注的政府治理创新路径,提高政府管理和决策过程中公众参与的水平,顺乎中国实际需要和世界潮流。     

贵州龙里巫山岩画人物图考释

在贵州龙里巫山岩画约 180人的丰富的人物图中 ,我们得以窥见古代贵州居民们动感十足的巫舞、丰收庆典舞、生命繁殖舞以及骑马放牧的壮观情景。佩剑武士和骑虎人物的狙犷威武场面也展示在我们面前。庄重肃穆的舞人与代表巫术之意的“王”形符号 ,只见于邻区岩画和考古遗存中 ,头上饰羽、角、尾装饰的各种人物所描绘的古朴、奇特的远古头饰装饰跃然眼帘。这一幅幅难得的民族艺术造型的瑰宝 ,与贵州山水、民族同在。     

Policy design and public support for carbon tax: Evidence from a 2018 US national online survey experiment

Public support for policy instruments is influenced by perceptions of how benefits and costs are distributed across various groups. We examine different carbon tax designs outlining different ways to distribute tax revenues. Using a national online sample of 1,606 US respondents, we examine support for a $20/ton carbon tax that is: (1) revenue neutral: revenue is returned to citizens via tax cuts; (2) compensation-focused: revenue is directed to helping actors disproportionately hurt by the tax; (3) mitigation-focused: revenue funds projects reducing carbon emissions; and (4) adaptation-focused: revenue is directed to enhancing community resilience to extreme weather events. We find devoting revenue to mitigation raises overall support for carbon tax by 6.3 per cent versus the control (54.9 per cent) where no information on spending is provided. Other frames raise support in specific subgroups only. Revenue neutrality raises support among lower-income households (+6.6 per cent) and political independents (+9.4 per cent), while compensation increases support among lower-income repondents (+6.1 per cent).     

情境预防视阈下首都社区安全治理——基于北京市23个社区的调查分析

情境预防理论表明首都社区安全治理绝不能仅依赖警察为主体的国家强制力,而应通过社区情境的优化来达到"无为而治"的社区治理效果。基于对北京市23个社区的调查分析,发现社区物理环境显著影响着社区安全度,楼房社区-自住平房-公寓-出租平房形成自高至低的社区安全梯度,因此情境预防应融入社区物理环境的规划-设计-建设-维护流程。另外,社区社会情境同样显著影响着社区安全度,社会治安综合治理机制与社区警务机制作为安全网络的双重支柱,应由压力型体制下单向执行转向双向互动网络,而基于互联网与物联网的社区大数据平台应构成社区神经系统与实时自动监测系统。     

Analysis of Factors of Overpricing in Public Procurement: A Study for Low-performing EU Countries

ABSTRACT

The paper deals with the issue of overpricing of public procurement in low-performing EU countries. It examines a uniquely large sample of public procurement in 11 Central and Eastern European countries. Hierarchical regression is used to analyze the factors that influence public contract. Our results indicate that institutional factors have a greater impact on overpricing than individual decisions by the contracting authority. Our analysis for low-performing EU countries provides interesting results and also draws attention to behavior that is not typical of the better established and more advanced EU countries. Our results are particularly important for public policy in each country, as they show the direction of regulatory action in the field of public procurement. The results introduce a debate on the appropriateness of “one size fits all” regulations within the EU.     

Slogans as an Organizational Feature of Chinese Politics

Journal of Chinese Political Science - Slogans (fixed or authoritative formulations, 提法) are ritually repeated elements in Chinese politics, appearing in strategic documents and main...     

居家养老服务供给对老年人养老满意度影响研究——基于8省市调查数据的分析

党的十八大以来,以习近平同志为核心的党中央高度重视老龄化和老年人生活,养老工作养老政策体系日益完备,居家养老服务体系初步建立。利用2019年"中国老龄化和养老工作调查"数据,从服务供给角度分析居家养老服务建设对老年人满意度的影响,居家养老服务总体上提高了我国老年人满意度水平,对环境满意度影响高于生活满意度;呈现较强增量效应,即服务项目数量越多,老年满意度越高;呈现异质性效应,健康护理类服务影响最大,精神文化类和权益保障类影响较大,生活辅助类没有显著正向影响。根据我国现阶段老年人年龄结构特征,养老服务要重视注重由"扶弱型"向"普及型"、从"补充型"向"提高型"转变,鼓励多元主体供给,更好满足老年人多层次需求,提高老年人多方面满意度。     

法医学二代测序STR分型准确度与测序深度的关联性评估

目的利用实验数据对法医学二代测序STR分型测序深度与分型结果准确度的关联性进行评估。方法使用商业化基因组DNA制备单一来源和混合的DNA样本,以Thermo Fisher公司的25重早期测试试剂盒进行目的STR片段扩增,每种扩增产物分别使用4种不同的序列标签平行建库,并控制标记每一种序列标签的文库上机量依次占一张Ion 318芯片的1/4、1/8、1/16、1/32。经Ion PGMTM基因测序仪测序,以及Ion Torrent SuiteTM软件进行数据分析;同时对庞敬博等人发表的基于相同试剂盒和测序仪检测的95名中国汉族无关个体的6928条等位基因、影子峰和噪音序列进行测序深度统计分析,寻找测序深度与STR分型准确度的关联性。结果各基因座测序深度随文库上样量减少而呈明显下降趋势。对于单一来源样本,每张芯片上样不超过8个均一化文库可实现全部基因座的完整分型;对于1∶20比例的混合DNA,每张芯片上样不超过4个均一化文库时,未发现微量组分的等位基因丢失。人群数据测序深度统计显示,该体系基因座间存在不均衡性,有必要针对各基因座分别设定分析阈值参数。结论测序深度与法医学STR分型结果的准确性密切相关,各基因座最低测序深度与平均测序深度的比值可作为设定分析阈值的重要参考指标。本研究确定的单张芯片上样数量仅适用于本实验体系,但相关实验设计和方案可供其他实验体系开展类似工作参考。