检索结果-南通市图书馆

Effect of Media on the Electric Field of a Rhombic Nanostructure Array

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2010年第6期27卷 217-220页

作者： ZHU shao-li ZHOU Wei Precision Engineering and Nanotechnology Centre School of Mechanical and Aerospace Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798

Electric field distribution is an important parameter for nanostructure arrays in nanobiosensing appfications. It can influence the sensitivity and the resolution of nanobiosensors. We focus on the effect of media on the electric field distribution of a rhombic silver nanostructure array. The finite-difference time-domain algorithm- based numerical calculation method is used to monitor the electric field distribution of the silver nanostructures when the refractive index of the medium around the nanostructure array is changed. The calculated results show that tuning the refractive index of the medium around silver can have a considerable influence on the electric field distribution in the reflection and transmission directions. This effect can be used to increase the extinction efficiency and to improve the resolution of the spectra for nanobiosensing.

关键词： ELECTRIC fields NANOSTRUCTURES RHOMBIC antennas BIOSENSORS SENSITIVITY analysis FINITE differences TIME-domain analysis NUMERICAL calculations

Soft Sensing Modelling Based on Optimal Selection of Secondary Variables and Its Application

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

International Journal of Automation and computing 2009年第4期6卷 379-384页

作者： Qi li Cheng shao Institute of Advanced Control Technology Dalian University of Technology Dalian 116024 PRC

The composition of the distillation column is a very important quality value in refineries, unfortunately, few hardware sensors are available on-line to measure the distillation compositions. In this paper, a novel method using sensitivity matrix analysis and kernel ridge regression （KRR） to implement on-line soft sensing of distillation compositions is proposed. In this approach, the sensitivity matrix analysis is presented to select the most suitable secondary variables to be used as the soft sensor＇s input. The KRR is used to build the composition soft sensor. Application to a simulated distillation column demonstrates the effectiveness of the method.

关键词： Distillation column sensitivity matrix analysis ridge regression kernel ridge regression (KRR) soft sensor

The new era for geo-information

在线全文

学校读者我要写书评

暂无评论

Science in China(Series F) 2009年第7期52卷 1233-1242页

作者： li DeRen shao ZhenFeng Laboratory for Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan 430079 China

Along with the forthcoming of Google Earth, Virtual Earth, the next generation of Internet, Web 2.0, grid computing and smart sensor web, comes the new era for geo-information. In this paper, main features of new geo-information era are discussed. This new era is characterized by these features： serviced users are extended from professionals to all public users, the users are data and information providers as well, geospatial data provided are no longer measurement-by-specification but measurement-on- demand through smart sensor web, and services are transferred from being data-driven to application- driven. Such problems as out-of-order issues in geographic data collection and information prolifer- ation, quality issues in geographic information updating, security issues in geographic information services, privacy issues in sharing geographic information and property issues in sharing geographic information, which are brought about by new geo-information era, especially those confronted in geo- information science and geo-spatial information industry, are analyzed. Then strategies concerning standards, planning, laws, technology and applications are proposed.

关键词： new geo-information era geo-services digital measurable image service-on-demand sensor web

Ranking effects of candidate drugs on biological process by integrating network analysis and Gene Ontology

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2010年第26期55卷 2974-2980页

作者： li liSha ZHANG NingBo li shao MOE Key Laboratory of Bioinformatics Division TNLIST/Department of Automation Tsinghua University Beijing 100084 China

There are high preclinical attrition rates in current drug discovery. The efficient assessment approach in the high throughout candidate drugs screening still needs great improvement. We propose two hypotheses. First, both drug action process and biological process can be converted to a common space of gene or gene product profiling. Second, the strength of drug action on biological process can be realized in the context of biological network. Based on the above hypotheses, we establish an algorithm termed Network-based Assessment for Drug Action (NADA) to assess the action strength of candidate drugs on certain biological processes. Then NADA is used to prioritize the effects of six compounds from traditional Chinese medicine on endothelial cell migration, a simple process defined by Gene Ontology, in the biological network specific for a given pathological process, angiogenesis. The computational results are subsequently tested by the experiment on the migration of Human Umbilical Vein Endothelial Cells in vitro. The experimental ranks for six compounds generally agree with the predicted output of NADA. NADA also outperforms the DAVID and meet/min methods in terms of the experimental orders, suggesting that the network topological features may have a key role in catching the mechanistic relationship between drug action and biological process. Hopefully, the progress of network biology approaches for deciphering complex diseases will further expedite the preclinical screening and accelerate the development of treatment modalities.

关键词：基因本体论药物作用生物过程网络分析过程集成人脐静脉内皮细胞细胞迁移产物分析

Speciation of heavy metals in airborne particles,road dusts,and soils along expressways in China

在线全文

学校读者我要写书评

暂无评论

Chinese Journal Of Geochemistry 2013年第4期32卷 420-429页

作者： shao li XIAO Huayun WU Daishe Environmental and Chemical Engineering College Nanchang University State Key Laboratory of Environment Geochemistry Institute of GeochemistryChinese Academy of Sciences

This study analyzed the concentrations and chemical forms of Zn,Cu,Pb,Sb,Cd and Mn in airborne particles,road dusts and soils collected along three expressways in Jiangxi Province,China,with different traffic densities,and identified the levels and sources of heavy metal *** concentrations of Zn,Cu,Pb,Sb,and Cd except Mn in airborne particles,road dusts and soils were all in direct proportion to traffic *** concentrations were low compared with other *** instance,the concentrations of Zn,Cu,Pb,Sb,Mn and Cd were 6.6,0.7,2.2,0.1,0.1 and 0.1μg·m-3in PM10along the Changjiu Expressway,792.8,241.4,248.3,9.6,340.5and 8.0 mg·kg-1in road dusts,and 201.1,143.2,59.5,9.5,338.9 and 2.3 mg·kg-1in soils,respectively,but in the case of the ratio of concentration to the environmental background value,most serious contamination was caused by *** sources of the heavy metals were judged by comparisons of the chemical forms of the heavy metals in different environmental *** and Mn in airborne particles were both derived from traffic;Pb in road dusts and soils resulted mainly from the use of leaded gasoline in the past;and Mn in road dusts and soils was derived from parent ***,Cu,Sb and Cd in airborne particles,road dusts and soils were derived primarily from traffic,and differences in chemical forms of the heavy metals in different media were due to the interaction between heavy metals in airborne particles and organic matter and other surfaces in road dusts and *** also discussed the change of chemical forms of heavy metals in particles of different sizes and under different weather *** of heavy metals in airborne particles was much higher than that in road dusts and soils,especially Pb(0.676 in airborne particles,0.159 in road dusts and 0.095 in soils).

关键词：大气颗粒物重金属形态中国土壤高速公路空气道路粉尘生物有效性

Sure feature screening for high-dimensional dichotomous classification

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 2016年第12期59卷 2527-2542页

作者： shao li YU Yuan ZHOU Yong School of Statistics and Management Shanghai University of Finance and Economics Academy of Mathematics and Systems Science Chinese Academy of Sciences

The curse of high-dimensionality has emerged in the statistical fields more and more *** techniques have been developed to address this challenge for classification problems. We propose a novel feature screening procedure for dichotomous response data. This new method can be implemented as easily as t-test marginal screening approach, and the proposed procedure is free of any subexponential tail probability conditions and moment requirement and not restricted in a specific model structure. We prove that our method possesses the sure screening property and also illustrate the effect of screening by Monte Carlo simulation and apply it to a real data example.

关键词： ultra-high dimensional data dichotomous classification sure screening property

Human cross-tissue cell atlases: unprecedented resources towards systematic understanding of physiology and diseases

在线全文

学校读者我要写书评

暂无评论

Signal Transduction and Targeted Therapy 2022年第11期7卷 3980-3981页

作者： Peng Zhang shao li Institute for TCM-X MOE Key Laboratory of BioinformaticsBioinformatics DivisionBNRISTDepartment of AutomationTsinghua University100084BeijingChina

Recently,three landmark cross-tissue single-cell atlases were published in Science,by the Tabula Sapiens Consortium,1 Eraslan et al.,2 and Domínguez Conde et al.,3 respectively,which collectively provided the comprehensive characterization of more than million cells across more than 30 human tissues,along with the deep interpretation of disease-associated genetic variations in the context of tissues and cell types.

关键词： al. diseases collective

Corrosion inhibition of stainless steel by a sulfate-reducing bacteria biofilm in seawater

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

International Journal of Minerals,Metallurgy and Materials 2012年第8期19卷 717-725页

作者： Fu-shao li Mao-zhong An Dong-xia Duan School of Chemistry and Chemical Engineering Qujing Normal University Qujing 655011 China State Key Laboratory for Marine Corrosion and Protection Qingdao 266071 China Chemical Engineering School Harbin Institute of Technology Harbin 150001 China

Corrosion inhibition of stainless steel due to a sulfate-reducing bacteria （SRB） biofilm in seawater was studied. By atomic force microscopy, a layer of fish-scale-like biofilm was found to form as stainless steel coupons were exposed to the culture media with SRB, and this biofilm grew more and more compact. As a result, coupons＇ surface under the biofilm turned irregular less slowly than that exposed to the sterilized culture media. Then, physicoelectric characteristics of the electrode/biofilrn/solution interface were investigated by electro- chemical impedance spectroscopy （EIS）, and the coverage of the biofilm as well as the relative irregularity of coupons＇ surface was also re- corded by EIS spectra.. Finally, anodic cyclic polarization results further demonstrated the protective property of the biofilm. Therefore, in es- timation of SRB-implicated corrosion of stainless steel, not only the detrimental SRB metabolites but also the protective SRB biofilm as well should be taken into account.

关键词： stainless steel corrosion prevention microbiology microorganisms biofilms electrochemistry

Improved carrier transport in Mn:ZnSe quantum dots sensitized La-doped nano-TiO2 thin film

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第4期29卷 351-359页

作者： shao li Gang li li-Shuang Yang Kui-Ying li State Key Laboratory of Metastable Materials Science and Technology College of Materials Science and EngineeringYanshan UniversityQinhuangdao 066004China

Mn:ZnSe/ZnS/L-Cys core-shell quantum dots(QDs)sensitized La-doped nano-TiO2 thin film(QDSTF)was prepared.X-ray photoelectron spectroscopy(XPS),nanosecond transient photovoltaic(TPV),and steady state surface photovoltaic(SPV)technologies were used for probing the photoelectron behaviors in the Mn-doped *** results revealed that the Mn-doped QDSTF had a p-type TPV *** bottom of the conduction band of the QDs as a sensitizer was just 0.86 eV above that of the La-doped nano-TiO2 thin film,while the acceptor level of the doped Mn2+ions was located at about 0.39 eV below and near the bottom of the conduction band of the *** intensity of the SPV response of the Mn-doped QDSTF at a specific wavelength was ~2.1 times higher than that of the undoped *** region of the SPV response of the Mn-doped QDSTF was extended by 191 nm to almost the whole visible region as compared with the undoped QDSTF *** the region of the TPV response of the Mn-doped QDSTF was also obviously wider than that of the undoped *** PV characteristics of the Mn-doped QDSTF may be due to the prolonged lifetime and extended diffusion length of photogenerated free charge carriers injected into the sensitized La-doped nano-TiO2 thin film.

关键词： doping effects ZnSe quantum dots sensitization nano-TiO2 thin film photoelectron spectroscopy