Wireless sensor network in American War-fighter Physiologic Status Monitoring System

单兵生命体征监测(WPSM)系统是一套基于采集、传输、存储、分析士兵生理数据的无线传感网络,它可以收集和监测包括人体的体温、脉搏、血压、呼吸、承受压力的情况、睡眠情况、身体的姿势、所能承受的工作强度等生命体征信号。同时,当士兵受伤或者极度疲劳时,它还能将士兵的状况报告给指挥官和医务兵。于是,着重讨论了WPSM中无线传感网的结构及其数据管理。War-fighter Physiologic Status Monitoring(WPSM)is a wireless sensor network that is used to collect,transmit,store and interpret physiologic data from soldiers,sailors and pilots.It can collect and monitor information regarding vital signs such as body temperature,heart rate,blood pressure,hydration and stress levels,sleep status,body position and workload capacity of the warrior.If necessary,the WPSM can notify medics and commanders if the soldier has been wounded or has become fatigued.The structure of the wireless sensor network in the WPSM and the data management of the sensor network are mainly discussed

双分教学模式在高校定向越野教学中的应用

为了提高高校定向越野教学效果,采用文献资料法、专家访谈法、教学实验法、数理统计法,在厦门大学定向越野课教学中结合我国高校定向运动开展的现状特点引入了"双分"教学方法。根据学生身体素质和识图能力的差异进行分层,并针对学生个体能力的特点,设计出与学生相对应的教学目标、教学内容、教学方法。结果显示"双分"教学模式充分体现出因材施教的原则,强调了学生在教学中所起到的主体作用,是适合普通高校定向越野课教学有效的方法

叠加式复合垂直流人工湿地污水处理装置

本实用新型的目的在于提供一种高效脱氮的叠加式复合垂直流人工湿地污水处理装置，其主要结构包括上层好氧池、下层厌氧池及外部连通管道组成，所述好氧池与厌氧池上下叠加、中间隔开，通过外部管道连通。本装置通过人为创造脱氮必要条件，可有效提高湿地系统氮的去除率，污水处理厂尾水经本实用新型深度脱氮处理后，硝态氮和总氮去除率提高20%-50%，占地面积减少一半，有效改善受纳水体的水环境质量，同时本实用新型装置可有效提高湿地进水的污染负荷，显著减少湿地占地面积。</p

Relative risk factors of in-hospital death due to aortic dissection

目的分析主动脉夹层(Ad)患者院内死亡的相关危险因素。方法回顾性分析厦门市心脏中心2002年1月至2011年10月确诊急性Ad患者175例的临床资料,其中男性129例,女性46例,平均年龄(56.8±12.1)岁。按住院期间是否死亡进行分组,分为存活组(n=141)及死亡组(n=34),分析年龄、性别、既往病史、血压水平、症状、并发症及实验室指标与死亡的相关性,并用lOgISTIC回归分析危险因素与病死率的关系。结果与存活组比较,死亡组d-二聚体水平升高,意识障碍和心包填塞比例增加,手术或支架治疗比例减少,差异有统计学意义(P均<0.05)。lOgISTIC回归分析结果表明,d-二聚体水平升高(Or=1.325,95%CI:1.436~1.973,P=0.004)、伴意识障碍(Or=2.481,95%CI:1.302~3.203,P=0.003)、心包填塞(Or=7.726,95%CI:1.762~34.003,P=0.008)为Ad患者住院死亡的独立危险因素,手术或介入治疗(Or=0.101,95%CI:1.762~34.003,P=0.044)为保护因素。结论 Ad患者中d-二聚体明显升高,并发意识障碍、心包填塞者病死率高,临床上应予高度重视,依据病情采取手术或介入治疗有利于降低Ad患者的病死率。Objective To analyze the relative risk factors of in-hospital death in patients with aortic dissection(AD).Methods The clinical materials of patients with acute AD [n=175, male 129, female 46 and average age was(56.8±12.1)] were analyzed retrospectively from Jan.2002 to Oct.2011, and all patients were divided into survival group(n=141) and death group(n=34).The correlation between age, sex, medical history, blood pressure level, symptoms, complications or laboratory indexes and death was analyzed, and the relatio level increased, and the percentage of patients with consciousness disorder and cardiac tamponade increased and percentage of patients with surgery or stenting decreased(all P<0.05).The results of Logistic regression analysis showed that increased D-dinship between risk factors and mortality was analyzed by using Logistic regression analysis.ResultsCompared with survival group, in death group D-dimermer level(OR=1.325, 95%CI: 1.436~1.973, P=0.004), consciousness disorder(OR=2.481, 95%CI: 1.302~3.203, P=0.003) and cardiac tamponade(OR=7.726, 95%CI: 1.762~34.003, P=0.008) were independent risk factors of in-hospital death, and surgery or interventional treatment(OR=0.101, 95%CI: 1.762~34.003, P=0.044) were protective factors in AD patients.Conclusion Mortality is higher in patients with increased D-dimer level or complicating consciousness disorder and cardiac tamponade.Surgery and interventional treatment can reduce the mortality

Numerical investigation of flow structures resulting from the interaction between an oblique detonation wave and an upper expansion corner

Wedge-induced oblique detonation waves (ODWs) have been studied widely, but their interactions with complicated geometries have not been fully addressed. In this study, we investigate ODW interaction with a deflected upper corner due to confinement change upstream of the ODW. Numerical simulations are conducted using the reactive Euler equations with a two-step induction-reaction kinetic model. Two ODWs without the upper wall deflection are first simulated to resolve the basic structures with inflow Mach numbers M-0 = 6 and 7. Thereafter, we introduce a deflected upper confinement, resulting in a new wave configuration. This wave is characterized by a post-turning, triangular recirculation zone coupled with a gaseous wedge connecting the deflection point and ODW surface. A parametric study is performed to analyse the effects of the deflection location, deflection angle and activation energy of the heat release reaction. The results reveal that the wave configuration is due to the evolution of ODW decoupling in an expanded supersonic flow. We further study the surface stability and structural unsteadiness arising for M-0 = 6. Upstream-travelling transverse waves are observed for the first time, and effects of different parameters on the surface instability are analysed via fast Fourier transforms. Two destabilizing mechanisms of ODW structures are proposed, one from the post-surface thermal choking and the other from the enhanced surface instability

社会系统工程与国家治理体系现代化

2014年3月30日,中国人民大学国家发展与战略研究院社会系统工程研究中心成立暨“社会系统工程与国家治理体系现代化“学术研讨会在中国人民大学逸夫会堂第一会议室举行,来自十余所高校和学术团体的专家、学者和一些媒体的代表参加了会议。现把会议主要发言内容选载如下

沙河小流域产汇流特性分析

通过对沙河小流域2004年3个径流小区的降水、径流深和泥沙等水文要素的分析,揭示了该区水文要素的年内变化趋势。3个径流小区径流深与降雨量的变化在6~8月份是不一致的,径流深和泥沙含量的变化在年内的变化基本上是一致的;泥沙含量随降水、径流深的变化而变化,尤其是受流域暴雨分布的影响更大;3个径流小区的径流系数的分布形状比较近似,说明了径流系数主要与流域的降雨有关,而与人类活动关系并不显著

一种煤层气产出水深度处理的方法及装置

本发明公开了一种煤层气产出水深度处理的方法，工艺步骤：A、通过格栅，对煤层气产出水内的大颗粒污染物和漂浮杂物进行截留；B、产出水在调节池内对水质水量进行调节，然后由提升泵提升至物化池；C、物化池通过填料对悬浮物、矿物质、盐类、低重度油类等污染物进行吸附沉淀过滤；D、物化池出水进入人工湿地，进一步深度处理后达标排放或回用。还公开了一种煤层气产出水深度处理的装置，包括格栅、调节池、物化池和人工湿地四大部分。系统具有投资低、运行稳定、出水效果好，在实现水资源回用的同时，具有较好的景观效果。</p