检索结果-南通市图书馆

Design of the ECRH Transmission System for HL-2A Tokamak

在线全文

学校读者我要写书评

暂无评论

Southwestern Institute of Physics Annual Report 2003年第1期 47-48页

作者： zhoujun LIUYong

HL-2A tokamak will be equipped with a 75 GHz/1 MW/1 s ECRH system. The paper describes the design of the transmission system (Fig. 1), which is made up with a transmission line, an equatorial launcher. The paper describes the design of main components of the system such as, waveguides, ellipsoidal surface mirrors, a chemical vapor (CVD) diamond window, a steering mirror.

关键词： HL-2A ECRH 传输系统概念设计波导椭球镜能量沉积

逆变型分布式电源并网运行暂态稳定机理与评估方法

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

电工技术学报 2022年第10期37卷 2596-2610页

作者：余墨多黄文焘邰能灵马洲俊林亚阳上海交通大学电子信息与电气工程学院上海200240 国网江苏省电力有限公司南京供电分公司南京210019 国网江苏省电力有限公司南通供电分公司南通226006

逆变型分布式电源(IIDG)是可再生能源在配电网中的重要应用方式,其稳定运行依赖于控制策略及其所接入的配电网系统。在配电网发生暂态事件时,IIDG暂态响应复杂,易出现输出功率、功角等波动或振荡。该文以IIDG控制系统及其接入电网的数... 详细信息

逆变型分布式电源(IIDG)是可再生能源在配电网中的重要应用方式,其稳定运行依赖于控制策略及其所接入的配电网系统。在配电网发生暂态事件时,IIDG暂态响应复杂,易出现输出功率、功角等波动或振荡。该文以IIDG控制系统及其接入电网的数学模型为基础,分析功角特性曲线,以功角曲线簇提出其暂态稳定性判据。对影响IIDG暂态稳定性的并网参数、额定功率进行系统性分析,比较不同参数对暂态稳定性的影响。通过刻画暂态过程,提出了暂稳迭代判定法,迭代计算暂态事件下IIDG的功角变化并对其暂态稳定性进行判断。在PSCAD/EMTDC中建立仿真算例,验证了IIDG暂态稳定性机理,并通过改变并网的网络参数,证明了暂稳迭代判定法的有效性与准确性。

关键词：逆变型分布式电源暂态稳定机理暂态稳定性计算功角曲线下垂控制

Abnormal Reactions of Free Radicals and Oxidative Damages in the Bodies of Patients With Chronic Glomerulonephritis

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2002年第3期15卷 233-244页

作者： zhoujun－FU CHENJIA－XI 等 TheSecondAffiliatedHospital MedicalCollegeofZhejiangUniversity88JiefangRoadHangzhou310009

Objective To study the abnormal reactions of a series of free radicals and the oxidative damages induced by free radical abnormal reactions in the bodies of patients with chronic glomerulonephritis. Methods Eighty chronic glomerulonephritis patients (CGNP) and eighty healthy adult volunteers (HAV) were enrolled in a random control study, in which concentrations of nitric oxide (NO) in plasma, lipoperoxides (LPO) in plasma and in erythrocytes, and vitamin C (VC), vitamin E (VE) and beta-carotene (?CAR) in plasma as well as activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX) in erythrocytes were determined with spectrophotometric assays. Results Compared with the average values of the above biochemical parameters in the HAV group, the average values of NO in plasma, and LPO in plasma and erythrocytes in the CGNP group were significantly increased (P = 0.0001), while those of VC, VE and -CAR in plasma as well as those of SOD, CAT and GPX in erythrocytes in the CGNP group were significantly decreased (P = 0.0001). Pearson product-moment correlation analysis showed that with increase of the concentration of blood creatinine as well as prolongation of the course of disease in the CGNP, the concentrations of NO in plasma, and LPO in plasma and erythrocytes in the CGNP increased gradually, while the concentrations of VC, VE and ?CAR in plasma as well as the activities of SOD, CAT and GPX in erythrocytes in the CGNP decreased gradually (P = 0.002454 0.000001). The relative risk ratio (RR) of the above biochemical parameters reflecting oxidative damages in the bodies of CGNP ranged from 6.061 to 72.429. The reliability coefficient (alpha) that the above biochemical parameters were used to reflect the oxidative damages of the CGNP was 0.8137, standardized item alpha = 0.9728, Hotelling抯 T-Squared = 1135680.191, F = 53274.6478, P = 0.000001. Conclusions The findings in this study show that in the bodies of CGNP a series of free rad

关键词： Chronic glomerulonephritis Free radicals Oxidation Lipoperoxidation Nitric oxide Lipoperoxides Antioxidant Antioxidase Oxidative stress Oxidative damage

在线全文

学校读者我要写书评

暂无评论

防御代码注入式攻击的字面值污染方法

计算机研究与发展 2012年第11期49卷 2414-2423页

作者：王溢李舟军郭涛北京航空航天大学计算机学院北京100191 中国信息安全测评中心北京100085

当前几乎所有的Web应用程序都面临着诸如跨站脚本(XSS)和SQL注入等代码注入式攻击的威胁,这种威胁源自于程序对用户输入缺乏验证和过滤,导致恶意输入可作为数据库查询或页面中的脚本而执行,从而破坏网站的数据完整性,泄露用户隐私.为了... 详细信息

当前几乎所有的Web应用程序都面临着诸如跨站脚本(XSS)和SQL注入等代码注入式攻击的威胁,这种威胁源自于程序对用户输入缺乏验证和过滤,导致恶意输入可作为数据库查询或页面中的脚本而执行,从而破坏网站的数据完整性,泄露用户隐私.为了增强应用程序对此类攻击的抵抗性,提出一种针对Web程序的字面值污染方法,该方法能够对代码注入式攻击给予高效的防御且十分易于部署.此方案通过强化服务器端脚本配合可自定义的安全过滤策略,达到对此类攻击的完全免疫.尽管需要对Web应用程序进行插桩等修改,但该过程是完全自动化和正确的,在处理大规模的程序时具有很强的实用价值.通过实现该技术的原型系统PHPHard对若干PHP应用程序的初步实验,可以发现该方法能够移除恶意脚本,成功阻止跨站脚本的攻击.与传统方法相比,它在精确度和有效性上具有优势,且仅引入了很小的开销.

关键词：代码注入字面值污染 Web应用程序漏洞跨站脚本污点传播

在线全文

学校读者我要写书评

暂无评论

基于双难题的环Z_n上圆锥曲线的数字签名

北京航空航天大学学报 2009年第9期35卷 1067-1071页

作者：林松李舟军王标北京航空航天大学计算机学院北京100191 国际关系学院信息科技系北京100091

通过对一个剩余类环Zn上圆锥曲线Cn(a,b)数字签名方案(X iao 06方案)的安全性分析,发现该方案的公开参数选取和算法设计存在问题,导致利用韦达定理可以分解模数n,说明X iao06方案的安全性不是基于整数分解难题的.针对此缺陷,采取保密部... 详细信息

通过对一个剩余类环Zn上圆锥曲线Cn(a,b)数字签名方案(X iao 06方案)的安全性分析,发现该方案的公开参数选取和算法设计存在问题,导致利用韦达定理可以分解模数n,说明X iao06方案的安全性不是基于整数分解难题的.针对此缺陷,采取保密部分参数和修改验证算法的方法,提出了一个改进的环Zn上圆锥曲线的数字签名方案,并且给出了改进方案的数值模拟.分析表明,改进的方案是一个同时基于离散对数和整数分解双难题的环Zn上圆锥曲线的数字签名方案,不仅保留了原X iao 06方案的优点(明文嵌入方便,求逆元速度快,元素阶的计算及曲线上点的运算容易),还具有很强的抗破解能力.

关键词：数字签名整数分解离散对数圆锥曲线

Chance-constrained Coordinated Optimization for Urban Electricity and Heat Networks

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2018年第4期4卷 399-407页

作者： Zhinong Wei Juan Sun zhoujun Ma Guoqiang Sun Haixiang Zang Sheng Chen Side Zhang Kwok W.Cheung College of Energy and Electrical Engineering Hohai UniversityNanjing 210098China State Grid Jiangsu Electric Power Corporation Nanjing 210098China GE Grid Solutions RedmondWA 98052USA

Urban electricity and heat networks(UEHN)consist of the coupling and interactions between electric power systems and district heating systems,in which the geographical and functional features of integrated energy systems are *** have been expected to provide an effective way to accommodate the intermittent and unpredictable renewable energy sources,in which the application of stochastic optimization approaches to UEHN analysis is highly *** this paper,we propose a chance-constrained coordinated optimization approach for UEHN considering the uncertainties in electricity loads,heat loads,and photovoltaic outputs,as well as the correlations between these uncertain sources.A solution strategy,which combines the Latin Hypercube Sampling Monte Carlo Simulation(LHSMCS)approach and a heuristic algorithm,is specifically designed to deal with the proposed chance-constrained coordinated ***,test results on an UEHN comprised of a modified IEEE 33-bus system and a 32-node district heating system at Barry Island have verified the feasibility and effectiveness of the proposed framework.

关键词： Chance-constrained optimal power flow(CCOPF) correlated uncertainties combined Latin Hypercube Sampling Monte Carlo Simulation(LHSMCS)approach and heuristic algorithm urban electricity and heat networks(UEHN)

Design of Collaborative Platform on Clustering Applications for Governments

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Intelligent Information Management 2009年第1期1卷 30-35页

作者： Xuewang ZHANG zhoujun LI Wei SHEN 不详

Collaborative platform on clustering applications for governments consists of six large-scale systems, including the clustering Government Internet portal system, clustering public-mailboxes collaboration system, clustering government affairs portal system, clustering emergency information collaboration system, clustering office automation collaboration system, and clustering messages collaboration systems. The appli-cation and technology architectures of the collaborative platform are elaborated in this paper,and the major key technologies on the platform are also expounded, which includes realization of many governments ap-plications’ scale integration and collaborative application, business model driven software development plat-form based on SOA, SSO, tans-departmental and cross-level multi-engine clustering protocol. Based on the "clustering application"design, to maximize the utilization of hardware, software resources and administra-tive resources of the provincial government collaborative platform, rural districts and counties can build their own platforms based on the provincial platform. The platform having been running for over 2 years shows that planning of urban and rural e-governments’ construction and maintenance is achieved, thus reducing costs greatly and improving governments’ functions.

关键词： clustering applications collaborative applications single sign on components e-govern- ment

骨折后手术患者异位骨化风险的nomogram临床评分系统的建立

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

上海交通大学学报（医学版） 2022年第2期42卷 166-172页

作者：王晔恺陈位杨颍辉吴静泽王和平姚燕珍鲍舟君浙江省舟山医院检验中心舟山316021 浙江省舟山医院骨科舟山316021 浙江省舟山医院放射诊断中心舟山316021

目的·建立预测骨折后接受手术治疗患者发生异位骨化(heterotopic ossification,HO)风险的nomogram临床评分系统。方法·选取2018年8月至2020年10月在浙江省舟山医院骨科或脑外科住院的骨折并接受手术的患者共124例,其中男性81例,女性43... 详细信息

目的·建立预测骨折后接受手术治疗患者发生异位骨化(heterotopic ossification,HO)风险的nomogram临床评分系统。方法·选取2018年8月至2020年10月在浙江省舟山医院骨科或脑外科住院的骨折并接受手术的患者共124例,其中男性81例,女性43例,年龄25~91岁[平均年龄(56.48±15.45)岁]。收集患者入院临床资料,包括性别、年龄、是否合并脑外伤、麻醉方式、手术持续时间、术中出血量等。采集患者骨折后1 d、7 d、15 d共3个时间点的外周血,ELISA法检测血清骨成形蛋白2(bone morphogenetic protein 2,BMP-2)、BMP-4、BMP-5、BMP-7及细胞因子白介素-4(interleukin 4,IL-4)、IL-6、IL-10、γ干扰素(interferonγ,IFN-γ)、转化生长因子-β(transforming growth factor-β,TGF-β)的浓度。按随访结果将患者分为可见HO组和未见HO组,以α=0.15从临床和实验室指征中挑选2组间差异具有统计学意义的变量纳入单变量Cox回归模型;再以α=0.05从单变量Cox回归模型中挑选变量纳入多变量Cox回归模型来筛选患者发生异位骨化的独立风险因子,并计算风险率(HR);最后通过R语言中的rms包进行nomogram可视化输出。结果·随访共发现13例异位骨化患者,随访发现时间中位数为71(38,292)d。通过组间比较、单变量Cox回归分析、多变量Cox回归分析得到合并脑外伤(HR=2.932,P=0.038),手术持续时间(HR=1.005,P=0.007),术中出血量(HR=1.004,P=0.022),15 d时的BMP-2(HR=1.009,P=0.044)、BMP-4(HR=1.004,P=0.011)、TGF-β(HR=1.011,P=0.046),以及7 d时的BMP-7(HR=1.004,P=0.008)共7个对异位骨化结局有显著影响的独立因子并输出得到骨折后90 d、180 d、360 d患者异位骨化发生概率预测的nomogram评分系统。结论·预测骨折后手术患者异位骨化风险的nomogram评分系统的7个评分指标分别为是否合并脑外伤,手术持续时间,术中出血量,骨折后15 d外周血BMP-2、BMP-4、TGF-β水平,以及骨折后7 d外周血BMP-7水平。

关键词：异位骨化骨折列线图脑外伤骨成型蛋白

Enhanced light extraction of GaN-based light-emitting diodes with periodic textured SiO_2 on Al-doped ZnO transparent conductive layer

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2016年第7期25卷 553-556页

作者：招瑜范冰丰陈义廷卓毅庞洲骏刘振王钢 State Key Laboratory of Optoelectronic Materials and Technologies School of Physics and Engineering Sun Yat-sen University School of Material and Energy Guangdong University of Technology

We report an effective enhancement in light extraction of Ga N-based light-emitting diodes（LEDs） with an Al-doped Zn O（AZO） transparent conductive layer by incorporating a top regular textured SiO2 layer. The 2 inch transparent throughpore anodic aluminum oxide（AAO） membrane was fabricated and used as the etching mask. The periodic pore with a pitch of about 410 nm was successfully transferred to the surface of the SiO2 layer without any etching damages to the AZO layer and the electrodes. The light output power was enhanced by 19% at 20 m A and 56% at 100 m A compared to that of the planar LEDs without a patterned surface. This approach offers a technique to fabricate a low-cost and large-area regular pattern on the LED chip for achieving enhanced light extraction without an obvious increase of the forward voltage.

关键词： light-emitting diodes III–V material transparent conductive layer anodic aluminum oxide