检索结果-南通市图书馆

Protection of Large-scale Wind Power Integration

在线全文

学校读者我要写书评

暂无评论

电力系统自动化 2012年第8期36卷 132-135页

作者： Cai, Rong su, bin ABB China Corporate Research Center Beijing 100015 China

More and more large capacity wind power will be integrated into power system in the future,and certain technical challenges will emerge due to the fluctuation characteristics of wind power and the complex control of power electronic devices inside the wind turbines(e.g.,low voltage ride through(LVRT)).By comparing a wind power integration grid with a hydropower integration grid,the special transient phenomena caused by the wind power integration is studied and simulation results are ***,the potential impacts on the traditional protection are *** show that the special transient phenomena can decrease the sensitivity,reliability and operation speed of conventional protections.

关键词：风力发电常规保护一体化电力电子器件风力涡轮机电力系统波动特性仿真结果

Role of serum carcinoembryonic antigen in the detection of colorectal cancer before and after surgical resection

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2012年第17期18卷 2121-2126页

作者： bin-bin su Hui Shi Jun Wan Department of Gastroenterology South BuildingChinese People's Liberation Army GeneralHospitalBeijing 100853China

AIM:To determine whether serum levels of carcinoembryonic antigen(CEA) correlate with the presence of primary colorectal cancer(CRC),and/or recurrent CRC following radical ***:A total of 413 patients with CRC underwent radical surgery between January 1998 and December 2002 in our department and were enrolled in this *** median follow-up period was 69 mo(range,3-118 mo),and CRC recurrence was experienced by 90/413(21.8%) *** levels of CEA were assayed preoperatively,and using a cutoff value of 5 ng/mL,patients were divided into two groups,those with normal serum CEA levels(e.g.,≤ 5 ng/mL) and those with elevated CEA levels(> 5 ng/mL).REsuLTS:The overall sensitivity of CEA for the detection of primary CRC was 37.0%.The sensitivity of CEA according to stage,was 21.4%,38.9%,and 41.7% for stagesⅠ-Ⅲ,***,for stageⅡandstageⅢcases,the 5-year disease-free survival rates were reduced for patients with elevated preoperative serum CEA levels(P < 0.05).The overall sensitivity of CEA for detecting recurrent CRC was 54.4%,and sensitivity rates of 36.6%,66.7%,and 75.0% were associated with cases of local recurrence,single metastasis,and multiple metastases,*** patients with normal serum levels of CEA preoperatively,the sensitivity of CEA for detecting recurrence was reduced compared with patients having a history of elevated CEA prior to radical resection(32.6% vs 77.3%,respectively,P < 0.05).CONCLUSION:CRC patients with normal serum CEA levels prior to resection maintained these levels during CRC recurrence,especially in cases of local recurrence vs cases of metastasis.

关键词： Colorectal cancer Carcinoembryonic antigen Recurrence

Vertically ordered silica mesochannels as preconcentration materials for the electrochemical detection of methylene blue

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

Science China Chemistry 2015年第10期58卷 1593-1599页

作者： Yayun He Longhua Ding bin su Institute of Microanalytical Systems Department of Chemistry Zhejiang University (Zijin’gang Campus)

Silica mesochannels(SMCs) vertically and regularly oriented to the surface of indium tin oxide(ITO) electrodes were prepared and utilized for preconcentration and detection of methylene blue(MB) in aqueous solution. The positively charged MB can be adsorbed to the SMCs by following the pseudo-first-order kinetic model. The negative value of ?G=?34.73 k J/mol derived from the Langmuir adsorption isotherm indicated the thermodynamic feasibility of the adsorption and the spontaneous nature of the process. Moreover, the adsorbed MB can undergo an electrochemical reaction on the ITO electrode at a suitable potential and the resulting electrical current can be utilized to quantify the MB in aqueous solution. A good analytical performance for MB with a linear range from 10 nmol/L to 1.0 ?mol/L and a detection limit at the nmol/L level was obtained. We believe that such a platform consisting of SMCs perpendicularly tethered to the underlying electrode surface simultaneously allows enrichment and electrochemical detection and can be extended for the detection of various charged dyes, as well as many other charged species.

关键词： methylene blue silica mesochannels preconcentration adsorption electrochemical detection

在线全文

学校读者我要写书评

暂无评论

Editorial

Journal of Analysis and Testing 2020年第2期4卷 55-56页

作者： bin su Institute of Analytical Chemistry Department of ChemistryZhejiang UniversityHangzhou 310058China

Electrochemiluminescence(ECL)is a luminescent phenom-enon,in which the emissive excited-states are generated under dark conditions by electrochemical reactions involv-ing heterogeneous charge transfer between electrode(s)and emitters(and co-reactants)in *** has attracted tre-mendous research attention and been successfully applied in commercial immunodiagnostics for the quantitative deter-mination of a broad range of disease biomarkers,due to its remarkable features such as short detection time(less than 20 min),wide measuring range(over six orders of mag-nitude),low sample consumption(dozens of microliter),high on-board stability(highly stable reagents),excellent precision and sensitivity(near-zero background interfer-ence).Totally several billions of ECL immunodiagnostic tests are commercially run worldwide a *** addition to diagnostics applications,ECL has also been developed as a versatile and powerful technique for fundamental research in diverse fields,such as biosensing,nanocatalysis,environ-mental monitoring and so *** is why this special issue is organized by the editorial office of Journal of Analysis and Testing.

关键词： solution. versatile excited

Packet track and traceback mechanism against denial of service attacks

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

The Journal of China Universities of Posts and Telecommunications 2008年第3期15卷 51-58页

作者： LI Li SHEN su-bin Institute of Information Network Technology Nanjing University of Posts and Telecommunications Nanjing 210003 China

The denial of service attack is a main type of threat on the Internet today. On the basis of path identification （Pi） and Internet control message protocol （ICMP） traceback （iTrace） methods, a packet track and traceback mechanism is proposed, which features rapid response and high accuracy. In this scheme, routers apply packet marking scheme and send traceback messages, which enables the victim to design the path tree in peace time. During attack times the victim can trace attackers back within the path tree and perform rapid packet filtering using the marking in each packet. Traceback messages overcome Pi＇s limitation, wherein too much path information is lost in path identifiers; whereas path identifiers can be used to expedite the design of the path-tree, which reduces the high overhead in iTrace. Therefore, our scheme not only synthesizes the advantages but also compromises the disadvantages of the above two methods. Simulation results with NS-2 show the validity of our scheme.

关键词： denial of service (DoS) attack traceback packet marking Pi

The Effect of Ionic Strength on the Electrochemiluminescence Generation by Tris(2,2′-bipyridyl)ruthenium(II)/Tri-n-propylamine

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2022年第3期38卷 816-822页

作者： HU Shifan WANG Yafeng su bin Institute of Analytical Chemistry Department of ChemistryKey Laboratory of Excited-State Materials of Zhejiang ProvinceZhejiang UniversityHangzhou310058P.R.China

Electrochemiluminescence(ECL)is a powerful transduction technique used in biosensing and in vitro diagnosis,while the mechanism of ECL generation is complicated and affected by various *** the effect of ionic strength on ECL generation by the classical tris(2,2′-bipyridyl)ruthenium(II)[Ru(bpy)_(3)^(2+)]/tri-n-propylamine(TPrA)system was *** is clear that the ECL intensity decreases significantly with the increase of ionic strength,most likely arising from the reduced deprotonation rate of TPrA^(+)·.We further combined microtube electrode(MTE)with ECL microscopy to unravel the evolution of ECL layer with the variation of ionic *** a low concentration of Ru(bpy)_(3)^(2+),the thickness of ECL layer(TEL)nearly kept unchanged with the ionic strength,indicating the surface-confined ECL generation is dominated by the oxidative-reduction *** at a high concentration of Ru(bpy)_(3)^(2+),ECL generation is dominated by the catalytic route and TEL increases remarkably with the increase of ionic strength,because of the extended diffusion length of Ru(bpy)_(3)^(3+) at a reduced concentration of TPrA·.

关键词： Electrochemiluminescence(ECL) ECL layer thickness ECL microscopy Ionic strength Reaction mechanism

Effect of Microdomain Structure on the Mechanical Behavior of binary Blends

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

Chinese Journal of Polymer Science 2015年第7期33卷 964-975页

作者： bin su Yong-sheng Zhao 陈枫傅强 College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan University

The relationship between microphase structure and mechanical response of the binary blends consisting of polystyrene-block-polyisoprene-block-polystyrene copolymer and low molecular weight polystyrene has been investigated. Low molecular weight polystyrene was chosen to obtain uniformly solubilized nano-blends without macrophase separation. The specimens were solution-cast by adding different amounts of homo-polystyrene to acquire different microphase structures. Small angle X-ray scattering（SAXS）, transmission electron microscopy（TEM） and atom force microscopy（AFM） have been used to study the microdomain and grain structure. It is observed that the structural changes in d-spacing and grain size on account of different amounts of polystyrene alter the mechanical behavior in both monotonic tensile and cyclic tests. The elastic and the Mullins effects are strongly sensitive to the changes in d-spacing and grain sizes. Moreover, the sample with bi-continuous structure shows the largest tensile strength and Mullins effect. In addition, the Mooneye-Rivlin phenomenological model was used to evaluate and explore the relationship between the polymer topological networks and the rubber elasticity of these styrenic nano-blends.

关键词： Microphase Grain size d-Spacing Bi-continuous structure Elastic response

An Implementation Model of Parlay MMCCS API Based on SIP

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2006年第2期13卷 43-49页

作者： GUAN You-qing SHEN su-bin Research Center of Network Technology Nanjing University of Posts and Telecommunications Nanjing 210003 P.R. China

Parlay Multi Media Call Control Services （ MMCCS） Application Programming Interfaces （API） based on Session Initiation Protocol （SIP） is essential for the implementation of Parlay Call Control （ CC） API. This paper first proposes an implementation model of Parlay MMCCS API based on SIP, then presents a mapping between SIP and MMCCS AP1 as far as methods and parameters are concerned, illustrates corresponding relationships between different components of SIP and MMCCS API by means of an application collaboration diagram, and finally presents an application using Java codes as well as some SIP messages. The application shows that a majority of MMCCS API based on SIP can be implemented and therefore verifies our mapping between MMCCS API and SIP.

关键词： SIP parlay MMCCS API

Recent advances in electrochemiluminescence imaging analysis based on nanomaterials and micro-/nanostructures

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2019年第9期30卷 1593-1599页

作者： Yanhuan Liu Weiliang Guo bin su Institute of Analytical Chemistry Department of Chemistry Zhejiang University

Electrochemiluminescence(ECL) is a kind of luminescent phenomenon caused by electrochemical reactions. Based on the advantages of ECL including low background, high sensitivity, strong spatiotemporal controllability and simple operation, ECL imaging is able to visualize the ECL process,which can additionally achieve high throughput, fast and visual analysis. With the development of optical imaging technique, ECL imaging at micro-or nanoscale has been successfully applied in immunoassay,cell imaging, biochemical analysis, single-nanoparticle detection and study of mechanisms and kinetics of reactions, which has attracted extensive attention. In this review, the basic principles and apparatus of ECL imaging were briefly introduced at first. Then several latest and representative applications of ECL imaging based on nanomaterials and micro-/nanostructures were overviewed. Finally, the superiorities and challenges in ECL imaging for further development were discussed.

关键词： Electrochemiluminescence Imaging analysis Nanomaterials Micro-/nanostructures Single particles