用电信息采集系统全事件采集运行效果分析

用电信息采集系统全事件采集业务开展以后,如果采集全事件电能表超过一定比例,日冻结数据采集成功率就会显著下降。文中详细分析各类低压台区采集方案的通信性能和集中器采集工作流程,查找影响日冻结采集成功率下降的原因。之后给出提升集中器采集日冻结和全事件数据的解决方案,并提出针对本地高速通信信道的集中器抄读机制改进建议。

“凤全事件”之我见

清末川边“改土归流”,是我国近代史上,也是藏族近代史上,具有重大意义的历史事件。这次改流,是以“凤全事件”为导火线,于光绪三十一年(1905)全面展开的。因此,深入研究“凤全事件”这一课题,不但对研究“改土归流”的历史作用有所帮助,同时也是研究近代史的重要组成部分。在这一课题的研究中,国内外学者论述颇多,使我受益非浅,可又觉得一些“定论”实不敢苛同,确有待商榷之处。本文冒昧地提出自己的一些浅见,以求教正。

一种全事件采集测试系统的设计与实现

介绍了一种用于用电信息采集系统全事件采集测试系统的设计。该系统重现现场噪声、模拟现场接线方式、模拟信号衰减。整个测试系统仿真现场环境影响、自动产生事件、比对事件采集结果、记录采集设备采集过程,较好的验证不同采集方案的全事件采集效果。文中的测试系统已经应用于实际测试工作中,研究成果对相关电力载波通信产品的评估、选型以及对于促进全事件采集效果提升具有重要意义。

智能电表全事件采集测试方法及应用研究

智能电表全事件采集事件上报分为主动上报、周期采集与按需采集三种方式,针对真实电表模拟现场中各类事件发生比较复杂,部分事件模拟难以开展。本文通过在实验室中搭建用采测试环境的仿真平台,提供了一种基于虚拟电能表模块的智能电表全事件采集测试系统,开展了智能电表全事件采集测试及应用效果分析,并提出工作建议。

1904年霍西笔下的巴塘、丁林寺与“乙巳凤全死亡事件”

1904年9月中旬,英国驻成都总领事霍西(H.Hosie)访问了四川巴塘。他所写的日记,为了解那时的巴塘、丁林寺和1905年(乙巳年)春“凤全死亡事件”的起因,提供了较为客观的旁证材料。当时新任驻藏帮办大臣凤全在巴塘停留期间,将限制喇嘛寺人数的主张“宣闻边鄙”,丁林寺反弹强烈,加上凤全强征徭赋、续办垦务、乖僻粗暴,终于酿成流血冲突,凤全被杀,是为“乙巳凤全死亡事件”。

低压用户停上电事件全采集方式的研究与分析

为了提高低压用户的供电质量和供电可靠性,减少计划外停电,需监测低压用户的停上电次数,全面实现对低压用户电能表停上电事件的采集。在采集系统实现低压用户停上电事件采集的方式有主站透抄、电能表主动上报和由集中器定时采集主动上报3种方式。本文将通过比较这3种采集方式在试点区的测试情况,对3种方式的性能和特点是否适合江西情况,将分别进行研究和分析。

带强制必然事件条件因子的全概率公式及其应用

对概率论中的全概率公式进行了有价值的拓展,提出并证明了带强制必然事件条件因子的全概率公式.基于该公式,对一直困扰人们,涉及强制必然事件随机问题的概率计算,给出了简单有效的计算方法.最后实例说明了其应用的广泛性.

电能表掉电和集中器停/上电事件测试方法研究

为完成中、低压电能计量装置在线监测中电能表掉电和集中器停电、上电事件的上报工作,从全性能检测过程中实际暴露的问题出发,对《智能电能表及采集终端事件记录采集规则》和《采集终端和电能表停电事件数据整理规则》中给出的电能表掉电和集中器停电、上电事件的功能进行了完善补充,并给出了相对应功能的检测方法。利用该方法可尽早在实验室发现电能表掉电事件误报、漏报等问题,为更好地完成电能表掉电和集中器停电、上电事件的上报工作奠定了基础。

心脏舒张功能不全对肝硬化门脉高压患者预后的影响

目的探讨心脏舒张功能不全对肝硬化门脉高压患者全临床事件发生的影响,分析心脏舒张功能不全与预后的相关性。方法收集2017年2月至2017年9月于我院消化科住院的肝硬化门脉高压症患者98例,其中Child-Pugh A级56例、B级37例、C级5例。行心电图和超声心动图(包括脉搏波多普勒和组织多普勒成像)检测。根据有无舒张功能不全分为两组进行随访,预期随访6~12个月,随访终点事件定义为全临床事件发生(死亡、再出血、肝衰竭、感染、肝肾综合征、肝性脑病、肝移植)。Kaplan-Meier曲线评估生存率,组间比较用Log-Rank检验。Cox比例风险回归分析全临床事件发生的影响因素。结果在98例患者中,58例(59. 2%)被诊断为左心室舒张功能不全,截至随访终点,3例(3. 1%)患者死亡,均发生在异常组,主要死因为肝功能衰竭。异常组与正常组全临床事件发生率、消化道再出血、累计未发生全临床事件率差异无统计学意义(P> 0. 05)。Cox比例风险回归分析得出HVPG(HR=1. 148,95%CI:1. 066~1. 237,P <0. 001)、心率(HR=1. 097,95%CI:1. 003~1. 201,P <0. 05)、NT-pro BNP (HR=1. 002,95%CI:1. 000~1. 003,P <0. 05)是影响全临床事件发生的独立危险因素。只将心血管相关指标代入,心率(HR=1. 055,95%CI:1. 004~1. 108,P <0. 05)、NT-pro BNP(HR=1. 001,95%CI:1. 000~1. 002,P <0. 05)是全临床事件发生的独立危险因素。结论心脏舒张功能不全并未显著增加与肝硬化患者预后相关的全临床事件发生。门脉压力、心率、NT-pro BNP是全临床事件发生的独立预测因素,应加强对这些指标的动态监测,早期干预可能改善预后。

弹炮结合多层防空体系服务概率分析

现代防空作战中为有效应对敌可能采取的饱和攻击,确保重点目标或者重要地域的对空安全,地面防空兵部队通常采用弹炮结合、多层部署的方法。利用排队论全概率事件理论相结合的方法,分析了弹炮可能的组合方式下的防空体系服务概率。通过对各种组合方式下的防空体系下服务概率的对比,可以对部署方案进行评估,为指挥员进行决策提供参考和依据。模型思路清晰,算法简洁实用,为分析防空体系的服务概率和作战效率提供了一种非常有效的方法。

Conditional autoregressive negative binomial model for analysis of crash count using Bayesian methods

In order to improve crash occurrence models to account for the influence of various contributing factors, a conditional autoregressive negative binomial （CAR-NB） model is employed to allow for overdispersion （tackled by the NB component）, unobserved heterogeneity and spatial autocorrelation （captured by the CAR process）, using Markov chain Monte Carlo methods and the Gibbs sampler. Statistical tests suggest that the CAR-NB model is preferred over the CAR-Poisson, NB, zero-inflated Poisson, zero-inflated NB models, due to its lower prediction errors and more robust parameter inference. The study results show that crash frequency and fatalities are positively associated with the number of lanes, curve length, annual average daily traffic （AADT） per lane, as well as rainfall. Speed limit and the distances to the nearest hospitals have negative associations with segment-based crash counts but positive associations with fatality counts, presumably as a result of worsened collision impacts at higher speed and time loss during transporting crash victims.

Network Security Incidents Frequency Prediction Based on Improved Genetic Algorithm and LSSVM

Since the frequency of network security incidents is nonlinear,traditional prediction methods such as ARMA,Gray systems are difficult to deal with the problem.When the size of sample is small,methods based on artificial neural network may not reach a high degree of preciseness.Least Squares Support Vector Machines (LSSVM) is a kind of machine learning methods based on the statistics learning theory,it can be applied to solve small sample and non-linear problems very well.This paper applied LSSVM to predict the occur frequency of network security incidents.To improve the accuracy,it used an improved genetic algorithm to optimize the parameters of LSSVM.Verified by real data sets,the improved genetic algorithm (IGA) converges faster than the simple genetic algorithm (SGA),and has a higher efficiency in the optimization procedure.Specially,the optimized LSSVM model worked very well on the prediction of frequency of network security incidents.

Thinking in three's: Changing surgical patient safety practices in the complex modern operating room

The three surgical patient safety events, wrong site surgery, retained surgical items (RSI) and surgical fires are rare occurrences and thus their effects on the complex modern operating room (OR) are difficult to study. The likelihood of occurrence and the magnitude of risk for each of these surgical safety events are undefined. Many providers may never have a personal experience with one of these events and training and education on these topics are sparse. These circumstances lead to faulty thinking that a provider won't ever have an event or if one does occur the provider will intuitively know what to do. Surgeons are not preoccupied with failure and tend to usually consider good outcomes, which leads them to ignore or diminish the importance of implementing and following simple safety practices. These circumstances contribute to the persistent low level occurrence of these three events and to the difficulty in generating sufficient interest to resource solutions. Individual facilities rarely have the time or talent to understand these events and develop lasting solutions. More often than not, even the most well meaning internal review results in a new line to a policy and some rigorous enforcement mandate. This approach routinely fails and is another reason why these problems are so persistent. Vigilance actions alone havebeen unsuccessful so hospitals now have to take a systematic approach to implementing safer processes and providing the resources for surgeons and other stake-holders to optimize the OR environment. This article discusses standardized processes of care for mitigation of injury or outright prevention of wrong site surgery, RSI and surgical fires in an action-oriented framework illustrating the strategic elements important in each event and focusing on the responsibilities for each of the three major OR agents-anesthesiologists, surgeons and nurses. A Surgical Patient Safety Checklist is discussed that incorporates the necessary elements to bring these team members together and influence the emergence of a safer OR.

Future Changes of Drought and Flood Events in China under a Global Warming Scenario

This study investigates the impact of global warming on drought/flood patterns in China at the end of the 21st century based on the simulations of 22 global climate models and a regional climate model(RegCM3) under the SRES(Special Report on Emissions Scenarios) A1B scenario.The standardized precipitation index(SPI),which has well performance in monitoring the drought/flood characteristics(in terms of their intensity,duration,and spatial extent) in China,is used in this study.The projected results of 22 coupled models and the RegCM3 simulation are consistent.These models project a decrease in the frequency of droughts in most parts of northern China and a slight increase in the frequency in some parts of southern China.Considering China as a whole,the spatial extents of droughts are projected to be significantly reduced.In contrast,future flood events over most parts of China are projected to occur more frequently with stronger intensity and longer duration than those prevalent currently.Additionally,the spatial extents of flood events are projected to significantly increase.

Research on Full Space Transient Electro-magnetism Technique for Detecting Aqueous Structures in Coal Mines

Based on the transmitting theory of "smoke ring effect", the transient electromagnetism technique was used in coal mines to detect abnormal areas of aquiferous structures in both roofs and floors of coal seams and in front of excavated roadways. Survey devices, working methods and techniques as well as data processing and interpretation are discussed systematically. In addition, the direction of mini-wireframe emission electromagnetic wave of the full space transient electromagnetism technique was verified by an underground borehole for water detection and drainage. The result indicates that this technique can detect both horizontal and vertical development rules of abnormal water bodies to a certain depth below the floor of coal seams and can also detect the abnormal, low resistance water bodies within a certain distance of roofs. Furthermore, it can detect such abnormal bodies in ahead of the excavated roadway front. Limited by the underground environment, the full space transient electromagnetism technique can detect to a depth of only 120 m or so.

Asymptotic Inefficiency of Incomplete Asset Markets and Symmetric Event Trees

Demonstrating theoretically the possibility that the financial market, albeit incomplete, has equilibrium and that this equilibrium is efficient and has been an important topic at the frontier of the research on general equilibrium for financial markets. The paper examines the asymptotic properties of incomplete financial markets taking into accounting the asset structure. The paper deals with a case in which a structure of securities relates to the asymptotic inefficiency.

A Concurrent Security Monitoring Method for Virtualization Environments

Recently,virtualization technologies have been widely used in industry.In order to monitor the security of target systems in virtualization environments,conventional methods usually put the security monitoring mechanism into the normal functionality of the target systems.However,these methods are either prone to be tempered by attackers or introduce considerable performance overhead for target systems.To address these problems,in this paper,we present a concurrent security monitoring method which decouples traditional serial mechanisms,including security event collector and analyzer,into two concurrent components.On one hand,we utilize the SIM framework to deploy the event collector into the target virtual machine.On the other hand,we combine the virtualization technology and multi-core technology to put the event analyzer into a trusted execution environment.To address the synchronization problem between these two concurrent components,we make use of Lamport's ring buffer algorithm.Based on the Xen hypervisor,we have implemented a prototype system named COMO.The experimental results show that COMO can monitor the security of the target virtual machine concurrently within a little performance overhead.

Conversion of Existing Roundabouts into Turbo-Roundabouts： Case Studies from Real World

Compared with roundabouts the main advantages of turbo-roundabouts are the reduction in the number of potential conflicting points and the lower speed of vehicles passing through the intersection, they both can improve safety conditions at the .junction. Moreover, the physical delimitation among lanes limits the side-by-side accident risk. These aspects make turbo-roundabouts more appropriate than roundabouts when a higher level of safety has to be guaranteed, particularly in presence of relevant pedestrian and two-wheels traffic volumes. The present paper has three main objectives： （1） to discuss general design criteria and functional principles of turbo roundabouts, （2） to give the geometric design principles of the central island and circulating lanes and （3） to present three case studies from real world concerning the conversion of existing roundabouts into turbo roundabouts.

Anglo-American Special Relations： Atomic Diplomacy and the Canadian Dimension, 1942-1948

In recent years, we have entered a period of increasing impact of world affairs on national politics and international security. Notwithstanding, the present debate on national security and nuclear proliferation, Anglo-American ＂special relations＂ continue to be a subject of vigorous discussion influenced by the impact of new international emergencies as unstable countries acquire nuclear power and refuse ＂to reign＂ in their nuclear programmes （The Globe and Mail, 12 January 2012）. Along these lines the 71st anniversary of the Anglo-American Manhattan Project presents a unique opportunity to reappraise the Anglo-American wartime collaboration （or lack of） in atomic energy developments that resulted in the tragedy of nuclear weapons escalation. The Quebec Agreements of 1943-1944 were crafted to address the controlled flow of scientific information. But did this mean a trend toward more effective collaboration or toward greater American control of the atomic project？ This study explores the subject of nuclear politics from an unique vantage point of Anglo-Canadian and American-Canadian atomic diplomacy. In doing so, it will show that both the American and British atomic policy makers violated the Quebec Agreements. It seeks to demonstrate that （1） in the tangle of competition replacing cooperation, Canada was more important to the American atomic monopolists than the Anglo-AmcTican partnership, （2） the US-Canada Trade and Defence Agreements contributed to United States retaining exclusive control of the ＂absolute weapon＂, and that （3） their post-war nuclear energy agenda delayed Britain＇s atomic venture and isolated Britain from full participation in Arctic research. In practical terms, the emerging atomic policy in Washington boiled down to maintaining the American edge, come what may, and reducing British prestige in the post-war world. The article concludes by raising the question： did the United States, Britain, and Canada really work for atomic control？

Addressing Religious Issues at UAE Schools in Times of Global Changes

After the era of globalization, religious diversity increases in most of the countries all over the world. Therefore, the main goal of this article is to discuss the necessity of teaching pupils about the different religions at schools in order for increasing their religious awareness about their own religion as well as improving their sensitivity towards other religions. Hence, such awareness and sensitivity may contribute to open the channels of dialogue among the new generations and prevent more violence from happening, as a result. In doing so, it will display the level of religious diversity around the world and the number of expected religious groups by 2050 as found by Pew Research Center （2015）. It will also briefly review the Islamic principles that are related to dealing with other religious groups. Moreover, it will present possible ways of how multiple religions can be taught in schools in order to transform pupils from religiocentric phases to religiorelative stages.