优质电力园区供电电源和定制电力装置协调性分析

优质电力园区(PPP)是定制电力技术应用的重要方面。本文主要从应用案例和研究现状两方面来对供电电源和电能质量装置协调性进行分析。首先分析了两种典型PPP应用案例中的协调问题;然后分析了实现不同电能质量等级供电和提高整体供电可靠性这两种不同研究方向PPP的协调问题,重点分析了前者,并给出了协调流程图。最后针对今后建设和研究方向的PPP,指出了如何实现供电电源和PQDs协调。     

基于GPRS的电力系统远程监控设计与研究

以电力远程监测系统领域现阶段的技术为参考,提出了一种基于GPRS无线通信技术和以ARM为内核的高性能的嵌入式微处理器的电力远程监测系统。首先简述了GPRS无线业务特点及其嵌入式系统技术,然后重点介绍了基于GPRS的电力线路监控系统的组成、原理,给出了硬件原理图,对具体的软硬件设计过程进行了简要的阐述。实践证明GPRS技术非常适用于要求实时性的、大数据量传送的应用场合。     

优质电力园区应用案例与拓扑结构研究综述

优质电力园区(Premium Power Park,PPP)作为定制电力技术应用的一个重要方面,无论在传统的工业领域,还是在现代的金融、IT行业都得到了应用。文中首先分析了国内外两个典型的PPP——特拉华PPP和仙台市多级电能质量供电系统示范基地的运行情况,并简要地介绍了国内外其它PPP的应用情况;然后从供电方式、所供应负荷类型以及采用定制电力装置的补偿能力等方面对PPP拓扑结构的发展状况进行了分析;最后对PPP今后的研究和发展方向作了总体分析,为今后PPP的规划和建设提供可选方案。     

TP53-Induced Glycolysis and Apoptosis Regulator (TIGAR) Is Upregulated in Lymphocytes Stimulated with Concanavalin A

The glycolytic modulator TP53-Inducible Glycolysis and Apoptosis Regulator (TIGAR) is overexpressed in several types of cancer and has a role in metabolic rewiring during tumor development. However, little is known about the role of this enzyme in proliferative tissues under physiological conditions. In the current work, we analysed the role of TIGAR in primary human lymphocytes stimulated with the mitotic agent Concanavalin A (ConA). We found that TIGAR expression was induced in stimulated lymphocytes through the PI3K/AKT pathway, since Akti-1/2 and LY294002 inhibitors prevented the upregulation of TIGAR in response to ConA. In addition, suppression of TIGAR expression by siRNA decreased the levels of the proliferative marker PCNA and increased cellular ROS levels. In this model, TIGAR was found to support the activity of glucose 6-phosphate dehydrogenase (G6PDH), the first enzyme of the pentose phosphate pathway (PPP), since the inhibition of TIGAR reduced G6PDH activity and increased autophagy. In conclusion, we demonstrate here that TIGAR is upregulated in stimulated human lymphocytes through the PI3K/AKT signaling pathway, which contributes to the redirection of the carbon flux to the PPP.     

基于蓝牙技术的移动设备实现无线上网的研究及系统的实现

蓝牙技术是移动通信技术和计算机网络技术结合的产物,它的出现使蓝牙无线个人区域网成为当前发展最迅速的领域之一.在众多无线技术中,蓝牙以其功耗低、成本低廉、组网灵活等优点而成为新的研究热点,是个人局域网（PAN）的理想实现技术.在对蓝牙技术和无线个人局域网进行分析和研究的基础上,并针对一个开发实例——实现多个移动终端设备接入互联网的蓝牙局域网接入应用,分别详细地介绍了移动终端设备软件和蓝牙局域网无线接入在Windows系统上的实现过程.     

嵌入式Linux系统无线网络功能的开发及应用

介绍了嵌入式操作系统的平台搭建及软件设计方案,给出了嵌入式Linux操作系统下GPRS网络的配置与实现,并结合实例阐述了在图形界面下基于Qt库的网络通讯程序的开发．     

基于复杂网络模型的城市综合管廊PPP项目风险传递过程研究

从复杂网络视角出发,利用案例分析法识别出城市综合管廊PPP项目的38个风险要素,将风险要素作为网络点,并将风险要素之间的关系作为网络边,构建复杂网络模型;通过分析3类复杂网络参数,阐明城市综合管廊PPP项目的风险传递过程;基于十堰市城市综合管廊PPP项目的实例,找到8个影响风险传递的核心因素,为决策者提供风险控制和防范的依据. 研究表明：实现风险防控需要控制直接风险并切断间接引发风险的传递路径,通过控制风险核心因素的方式有效引导风险传递. 以上研究从理论上发现了复杂项目风险传递的突破口,在实践上探索了行之有效的复杂项目风险控制模式.     

PPP协议在GPRS远程监控系统中的应用

通过对PPP进行深入研究，分析了基于GPRS的PPP协商过程，叙述了PPP组成、内容、含义和连接的过程等；并分析了PPP协商过程的数据交换情况。从而为进一步利用PPP协议实现无线远程监控提供了良好的基础。     

A review of studies on Public–Private Partnership projects in the construction industry

Public–Private Partnership (PPP) in construction is gaining in popularity. Although papers published in major journals have documented real cases of PPP projects, there appears to be a lack of systematically summarizing what they have already provided. Consequently, this paper reviewed PPP studies published in the six top journals in the construction field. The objectives are to compare and contrast the findings of the studies so as to provide insights for directing further PPP research and improving the existing practices of PPP projects. To achieve the review objectives, studies were first classified as either empirical or non-empirical. Empirical studies were further grouped under three themes: risks, relationships, and financing. Non-empirical studies were grouped under five themes: financing, project success factors, risks, and concession period. Suggestions for further research are risks, financing, contractual agreements, development of PPP models, concession periods, and strategies in choosing the right type of PPP.     

软GPRS通信模块的设计与实现

在GPRS技术受到空前欢迎的背景下,各种硬件GPRS模块层出不穷,但由于GPRS自身的速率瓶颈,限制了其应用。基于此,介绍了一种基于PC机的软GPRS设计方案,该方案通过UART和Ethernet来实现硬件GPRS的功能,支持3GPP TS 27.010 multiplexer协议,能承载基于TCP/IP协议的所有业务,具有成本低廉、稳定性高、对上层协议与应用透明等优点,可应用需要较高数据传输率的工业应用和无线系统开发调试过程中,并可以平滑过渡到基于AP＋BP方案的3G应用中。