检索结果-南通市图书馆

Soluble ST2:A Novel Biomarker for Diagnosis and Prognosis of Cardiovascular Disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Medical Science 2024年第4期44卷 669-679页

作者： yin feng Li-qun HE Department of Cardiology Traditional Chinese and Western Medicine Hospital of WuhanTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China

The increasing incidence of cardiovascular disease(CVD)is a significant global health concern,affecting millions of individuals each *** diagnosis of acute CVD poses a formidable challenge,as misdiagnosis can significantly decrease patient survival *** biomarkers have played a vital role in the diagnosis and prognosis of CVDs,but they can be influenced by various factors,such as age,sex,and renal *** ST2(sST2)is a novel biomarker that is closely associated with different *** low reference change value makes it suitable for continuous measurement,unaffected by age,kidney function,and other confounding factors,facilitating risk stratification of ***,the combination of sST2 with other biomarkers can enhance diagnostic accuracy and prognostic *** review aims to provide a comprehensive overview of sST2,focusing on its diagnostic and prognostic value as a myocardial marker for different types of CVDs and discussing the current limitations of sST2.

关键词： soluble ST2 cardiovascular disease combined biomarker diagnosis and prognosis limitations

Study of Squeezed Excitons in Polar Semiconductors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2009年第3期51卷 545-549页

作者： yin Miao CHENG ze WU Zi-Xia PING Yun-Xia Department of Physics Huazhong University of Science and Technology Wuhan 430074 China

Some properties of excitons in polar semiconductors are studied theoretically by means of squeezed state variational approach. This method makes it possible to consider bilinear terms of the phonon operators as well as linear terms arising from the Lee-Low-Pines （LLP）-like transformation. The exciton ground state energy and binding energy are calculated numerically. It is shown that the squeezing effect is significant in the case of strong exciton-phonon coupling region.

关键词： squeezed exciton electron-phonon interaction binding energy

Herscovici’s Conjecture on the Product of the Thorn Graphs of the Complete Graphs

在线全文

学校读者我要写书评

暂无评论

Journal of the Operations Research Society of China 2014年第2期2卷 263-269页

作者： Dong-Lin Hao ze-Tu Gao Jian-Hua yin Department of Mathematics College of Information Science and TechnologyHainan UniversityHaikou 570228China

Given a distribution of pebbles on the vertices of a connected graph G,a pebbling move on G consists of taking two pebbles off one vertex and placing one on an adjacent *** t-pebbling number f_(t)(G)of a simple connected graph G is the smallest positive integer such that for every distribution of fteGT pebbles on the vertices of G,we can move t pebbles to any target vertex by a sequence of pebbling *** conjectured that for any connected graphs G and H,f_(1)(G×H)≤f1(G)f1(H).Herscovici further conjectured that fst(G×H)≤6 fseGTfteHT for any positive integers s and *** et al.(Discret Math,309:3431–3435,2009)proved that Graham’s conjecture holds when G is a thorn graph of a complete graph and H is a graph having the 2-pebbling *** this paper,we further show that Herscovici’s conjecture is true when G is a thorn graph of a complete graph and H is a graph having the 2t-pebbling property.

关键词： Thorn graph t-Pebbling number Graham’s conjecture Herscovici’s conjecture

The impact of coastal reclamation on tidal and storm surge level in Sanmen Bay, China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2019年第6期37卷 1971-1982页

作者： YANG Wankang feng Xingru yin Baoshu Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Second Institute of Oceanography Ministry of Natural ResourcesHangzhou 310012China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Laboratory for Ocean Dynamics and Climate Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China

In recent years,fast economic development demands for more land use and thus many reclamation projects are initiated around the Sanmen Bay,Zhejiang,SE China in the East China Sea,for which tidal and storm surge levels are reassessed.A two-dimensional numerical model based on an advanced circulation model(ADCIRC)was applied to evaluate the impact of reclamation projects on tidal and storm surge levels in the *** results show that the shoreline relocation and topographic change had opposite effects on tidal *** relocation decreased the tidal amplitude,while siltation caused topographic change and increased the *** variations of the amplitude were significant in the top areas of Sanmen *** types of typhoon paths were selected for a case study to investigate the impacts of shoreline relocation and topographic change on storm surge *** show that the maximum increase in storm surge level due to shoreline relocation was less than 0.06 *** rise of peak surge level due to the change of topography was significant and the peak surge level rose when siltation *** maximum surge level rise occurred in the path of northwest landing typhoons,which exceeded 0.24 m at the top of the *** rise in peak surge level can potentially lead to severe damages and losses in Sanmen Bay and more attention needs to be paid to this problem of shoreline change in the future.

关键词： Sanmen Bay reclamation project tidal height peak surge level

MODELING AND IMPLEMENTATION OF SPEED GOVERNOR FOR THE HYBRID ELECTRIC VEHICLE ENGINE

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2005年第4期18卷 603-608页

作者： feng Qishan Zhang Jianwu yin Chengliang School of Mechanical Engineering Shanghai Jiaotong University Shanghai 200030 China

A speed control analysis for an in-line gasoline fueled internal combustion （IC） engine is presented for the purpose of alleviation of high frequency oscillations in engine revolutions. A dynamic cylinder-by-cylinder model is proposed, base on slider-crank mechanism, which is extended to develop a digital governor providing a high fidelity estimation of rotary speed oscillation for hybrid vehicle engines. A modified PID controller that P and I gain is placed in feedback path is also described for hybrid electric vehicle （HEV） engine speed regulation, By comparison between measured and estimated signals, it is demonstrated that a good agreement has been achieved and the governor behaves an excellent damping speed ripple.

关键词： Digital speed governor Engine dynamic model Slider-crank mechanism Hybrid electric vehicle (HEV)

Equilibrium of Organic Matter in Heavy Fraction for Three Long-term Experimental Field Soils in China

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2006年第2期16卷 177-184页

作者： yin Yun-feng CAI Zu-Cong State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 （China）.

Considerable evidence that the soil organic matter （OM） level in agricultural soils will gradually over time reach an equilibrium state under certain bioclimatic conditions and for certain cropping systems has been accumulating. Although models or long-term experiments have been used, this research used physical fractionation procedure to attain an soil OM equilibrium value. To obtain soil OM equilibrium values in the heavy fraction, typical soils from three long-term field experiments at fengqiu and yingtan State Key Agro-Ecological Experimental Stations in China were studied using a simple density fractionation procedure and employing the Langmuir equation. Results for the fluvo-aquic soil with organic fertilizer treatments indicated that the soil OM equilibrium value in the heavy fraction was twofold more than that in the inorganic treatments; however, for the paddy soil developed on red soil the OM equilibrium value in the heavy fraction for both treatments was almost identical. It suggested that for fiuvo-aquic soils the increased potential of OM for the heavy fraction in the long run was larger for the organic than the inorganic fertilizer applications, whereas for paddy soils developed on red soils under the same conditions the present OM content in the heavy fraction was at or close to this equilibrium level for all treatments, and increased potential was very limited.

关键词： equilibrium value heavy fraction Langmuir equation soil organic matter

An Enzyme-Free Amperometric Sensor Based on Self-Assembling Ferrocene-Conjugated Oligopeptide for Specific Determination of L-Arginine

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2021年第10期39卷 2755-2762页

作者： Kai-Jie Zhu Li Zhou Ling Wu Sai-Fei feng Hui-ying Hu Jing-Lin He Yu-Min He ze-Meng feng Yu-Long yin Donghong Yu Zhong Cao Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation and Hunan Provincial Key Laboratory of CytochemistrySchool of Chemistry and Biological EngineeringChangsha University of Science and TechnologyChangshaHunan410114 China Institute of Subtropical Agriculture Chinese Academy of SciencesChangshaHunan 410125China Department of Chemistry and Bioscience Aalborg UniversityDK-9220 AalborgEastDenmark

Main observation and conclusion An enzyme-free amperometric sensor based on a heptadecapeptide possessing an electroactive ferrocene(Fc)linker as ferrocene-Gly-Gly-Gly-Gly-Phe-Gly-His-Ile-His-Glu-Gly-Tyr-Gly-Gly-Gly-Gly-Lys-(CH_(2))_(4)-dithiocyclopentane self-assembled on gold substrate was designed and fabricated for specific determination of L-arginine(L-Arg).The detection mechanism is based on conformational change of surface-immobilized peptide induced by the target L-Arg,which was confirmed via SEM,TEM,AFM,XPS,and SPR *** binding affinity and the recognition feasibility of immobilized specific and non-specific peptides were also assessed using electrochemical impedance spectroscopy(EIS),cyclic voltammetry(CV),and differential pulse voltammetry(DPV).The proposed method can serve as“signal-on”sensor for detection of L-Arg down to 31 pmol/L with broad linear range(0.0001 to 10μmol/L).Furthermore,the Fc-conjugated specific peptide sensor was successfully applied to the determination of L-Arg in pig serums with a recovery rate of 97.5%—106.9%,and its test results are in good agreement with that of chromatographic instrument,evidencing that the oligopeptide-based sensor can be served as a simple and enzyme-free biosensing platform towards L-Arg for future application.

关键词： L-Arginine Peptides Surface Analysis Enzyme-Free Amperometric Sensor

Research of the underground coal bunker clearing robot

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Coal Science & Engineering(China) 2010年第1期16卷 104-107页

作者： SONG Zhi-an ZHAN feng LI Cheng-yin WANG ze-le ZHANG Shan-lin College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao 266510 China Zhaizhen Coal Mine Xinwen Mining Group Co. Ltd. Xintai 271200 China Yunda Machinery Factory Changle County Weifang 262400 China

With the long-term use of coal bunker, a certain amount of sticking objects will beformed on its wall, and coal mine clearing robot can replace man in clearing the bunker ***, since it equip with an explosion-proof camera, the worker can determine the operationby observing the well-head ***, it cannot work unless it is placed in positionand supported stably, and it has three degrees of freedom: rotating, stretching, and *** is driven by the hydraulic and controlled by *** underground coal mine clearingrobot changs the traditional clearing methods, man does not have to enter the bunker toclear it, which ensures the production safety of coal transportation.

关键词： underground coal bunker clearing robot coal bunker coal transport

Challenges to quantitative applications of Landsat observations for the urban thermal environment

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2017年第9期29卷 80-88页

作者： feng Chen Song Yang Kai yin Paul Chan School of Atmospheric Sciences Sun Yat-sen UniversityZhuhai 519082China Institute of Earth Climate and Environment System Sun Yat-sen UniversityOuangzhou 510275China Fujian Key Laboratory of Sensing and Computing.for Smart City Xiarnen UniversityXiarnen 361005China Institute of Remote Sensing and Digital Earth Chinese Academy of SciencesBeijing 10094China Climate Decision LLC BethesdaMDUSA

Since the launch of its first satellite in 1972, the Landsat program has operated continuously for more than forty years. A large data archive collected by the Landsat program significantly benefits both the academic community and society. Thermal imagery from Landsat sensors, provided with relatively high spatial resolution, is suitable for monitoring urban thermal environment. Growing use of Landsat data in monitoring urban thermal environment is demonstrated by increasing publications on this subject, especially over the last decade. Urban thermal environment is usually delineated by land surface temperature（LST）. However, the quantitative and accurate estimation of LST from Landsat data is still a challenge, especially for urban areas. This paper will discuss the main challenges for urban LST retrieval, including urban surface emissivity, atmospheric correction, radiometric calibration, and validation. In addition, we will discuss general challenges confronting the continuity of quantitative applications of Landsat observations. These challenges arise mainly from the scan line corrector failure of the Landsat 7 ETM ＋ and channel differences among sensors. Based on these investigations, the concerns are to：（1） show general users the limitation and possible uncertainty of the retrieved urban LST from the single thermal channel of Landsat sensors;（2） emphasize efforts which should be done for the quantitative applications of Landsat data; and（3） understand the potential challenges for the continuity of Landsat observation（i.e., thermal infrared） for global change monitoring, while several climate data record programs being in progress.

关键词： Remote sensing Radiometric calibration SLC-off Surface temperature Data consistency