基于风险事件的我国期货交易所的风险管理

期货交易所作为期货交易的组织者，在市场风险管理体系之中发挥着重要的作用。通过分析期货市场以往风险事件，发现我国期货交易所风险管理的问题主要在于制度约束效率低以及缺乏交易过程风险监控。建立基于风险管理的组织结构和基于市场异常情况监控的风险预警机制将有助于提高期货交易所风险管理水平，维护期货市场的稳定运行。     

基于嵌入式LINUX的异步事件驱动数据采集模型

提出了一种基于嵌入式Linux的高性能多路数据采集软件模型．该模型采用ACE设计模式提供的体系架构，实现了异步事件驱动的并发处理，能支持事件多路分离，异步操作结束会触发事件句柄，再调用回调函数完成相应的数据处理任务。由于对数据源事件的监测、数据读取、多事件的处理等操作是由操作系统完成．该模型可以有效避免多进程同步机制系统开销较大的问题，从而提高嵌入式系统的多路数据并发采集能力。     

数据抽取技术在安全事件管理系统中的应用研究

本文主要针对目前安全事件管理系统中安全事件信息抽取的问题,提出了基于XML语言的安全事件信息和抽取方法描述的数据抽取框架DS_XML,该框架可以实现跨平台的,分布式的安全事件信息抽取,从而为安全事件管理系统提供可靠的安全事件信息数据源.     

Hybrid parallel computing of minimum action method

In this work, we report a hybrid (MPI/OpenMP) parallelization strategy for the minimum action method recently proposed in [17]. For nonlinear dynamical systems, the minimum action method is a useful numerical tool to study the transition behavior induced by small noise and the structure of the phase space. The crucial part of the minimum action method is to minimize the Freidlin–Wentzell action functional. Due to the fact that the corresponding Euler–Lagrange equation is, in general, highly nonlinear and of high order, we solve the optimization problem directly instead of discretizing the Euler–Lagrange equation to provide a general but equivalent numerical framework. To enhance the efficiency of the minimum action method for general dynamical systems we consider parallel computing. In particular, we present a hybrid parallelization strategy based on MPI and OpenMP. Numerical results are presented to demonstrate the efficiency of the proposed parallelization strategy.     

“棱镜”折射下的网络信息安全挑战及其战略思考

"棱镜"事件的发生,暴露了网络信息安全的巨大漏洞,对我国计算机网络信息安全是前所未有的挑战,这就迫切要求我国计算机行业必须加快更新网络信息的安全战略,充分利用新科学技术保护国家与国民的隐私与权力。立于此种观念之下,文章主要结合美国的"棱镜"事件诱因,进而思考"棱镜"折射下的网络信息安全挑战及其战略。     

河道整治对洪水情势影响的初步分析——以松阳县松阴溪干流为例

河道整治特别是两岸堤防的新建、加高和加固等措施是提高河道防洪能力的主要工程手段,但是河道堤防在满足设计标准后,在发生设计频率洪水时,原来的洪水漫滩现象大大减少,这将增加下游的洪峰流量,洪峰时间也将提前,对下游的防洪有一定的不利影响。以松阳县松阴溪干流为例,通过河道非恒定流模型计算发现,松阴溪流域遭遇20年一遇洪水时,河道堤防整治后靖居口水文站处洪峰流量将增大5.3%,峰现时间提前0.9 h。     

一种基于体育径赛的动态分组算法的设计与实现

常用的运动会管理软件中体育径赛项目分组分道多以固定八道处理,编排算法固定,存在一定的缺陷。本文提出了一种不受道数限制的动态分组算法,详细论述了该算法的设计思想,结合Office.NET组件技术论述了如何将此算法应用到校园田径运动会的秩序册编排系统中,有效地实现了灵活的径赛分组分道的编排任务。实验证明,利用本文提出的动态分组算法,可以对体育径赛项目进行灵活快捷地分组,在一定程度上弥补了目前运动会管理软件的不足。     

Life on the line: Job demands, perceived co-worker support for safety, and hazardous work events.

The present study of 334 United Kingdom trackside workers tested an interaction hypothesis. We hypothesized, drawing on the job demands-resources framework, that perceived support for safety (from senior managers, supervisors, and coworkers) as job resources would weaken the relationship between higher job demands and more frequent hazardous work events. Consistent with social impact theory, we predicted that perceived coworker support for safety would be particularly influential when trackside workers faced higher job demands. Moderated multiple regression showed that, of all three sources of perceived support for safety, perceived coworker support for safety was most important for keeping employees safe in the face of high job demands. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Solar disinfection of wild Salmonella sp. in natural water with a 18 L CPC photoreactor: Detrimental effect of non-sterile storage of treated water

For the first time solar disinfection of liters of water containing wild Salmonella sp. and total coliforms was carried out in a compound parabolic collector (CPC) photoreactor at temperatures of almost 50 °C. Using surface water with high turbidity, this treatment was efficient in completely inactivating Salmonella sp. without regrowth during the subsequent 72 h of dark sterile storage. However if the solar treated water is poured in a non- sterile container, bacteria regrowth occurs even if 10 mg L⁻¹ of H₂O₂ is added before the storage. On the other hand, 30 mg L⁻¹ of H₂O₂ added when the irradiation started was completely depleted within 2 h and did not prevent bacterial regrowth during post-irradiation storage in non-sterile containers, demonstrating that storage of large volumes of water treated by solar irradiation was not optimal. Finally, total coliforms (Escherichia coli included) showed a far higher sensitivity than Salmonella sp. and demonstrated to be an inappropriate indicator for monitoring bacterial contamination in water during solar disinfection processes.     

Analysis of the effects of temporally distant events on school behavior.

The purpose of this study was to assess the relationship between temporally distant antecedent events (TDEs) and the frequency and function of aggressive and out-of-seat behaviors occurring in the school setting. A checklist of potential TDEs was developed for each of three participants (aged 4–5 yrs) with behavior problems, based on interviews with caregivers and school personnel. Each day, parents completed the checklist and a functional analysis of problem behavior was conducted. For each participant, initial functional analyses yielded undifferentiated results. When data from the functional analysis were graphed according to the occurrence or nonoccurrence of a specific TDE, results demonstrated a momentary change in both the frequency and function of the target behavior. These results are consistent with previous literature that describes certain antecedent events as establishing operations. Discussion focuses on (a) determining which antecedent events serve as potential establishing operations; (b) how these events interact to alter the functional properties of temporally distant problem behavior; and (c) the implications for school-based interventions. (PsycINFO Database Record (c) 2011 APA, all rights reserved)