检索结果-南通市图书馆

Patternable production of SrTiO_(3) nanoparticles using 1-W laser directly on flexible humidity sensor platform based on ITO/SrTiO_(3)/CNT

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2021年第12期71卷 186-194页

作者： Le Thai Duy ji-ye Baek ye-ji Mun Hyungtak Seo Department of Materials Science&Engineering Ajou UniversitySuwon16499South Korea Department of Energy Systems Research Ajou UniversitySuwon16499South Korea

Perovskite oxides like S rTiO_(3) at the nanoscale are of interest for eme rging applications,including high-k dielectrics and ***,their synthesis requires long calcination at the elevated temperature,which is a barrier of their application to flexible ***,an effective laser-assisted sol-gel method to patternably produce S rTiO_(3) na noparticles(-100 nm)in selective areas on polyimide substrates(coated with ITO)is ***,the violet-laser power is just 1 W but sufficient to crystallize the material in a short period(a few seconds).Furthermore,developing a flexible device platform using carbon nanotubes(CNT)and SrTiO_(3) nanoparticles for detection of humidity changes at room temperature is *** sensor platform has both capacitive and resistive sensing *** resistive mode with a lower power usage(about 0.2μW)is suitable for long monitoring of humidity in the range of2%RH and *** capacitive mode with higher sensitivity,faster response/recovery time(1-3 min),and lower detection limit(0.5%RH)can be used for calibration *** performance of the flexible sensor is still maintained after 5000 bending cycles at 1.5-cm ***,our synthesis method and the flexible sensor show chances for mass-producing perovskite oxides at low cost for wearable electronics.

关键词： SrTiO_(3) Nanoparticles Laser annealing Patternable Flexible sensor CNT

De Casteljau Algorithm and Degree Elevation of Toric Surface Patches

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2021年第1期34卷 21-46页

作者： LI jinggai ji ye ZHU Chungang School of Mathematical Sciences Dalian University of TechnologyDalian 116024 Key Laboratory for Computational Mathematics and Data Intelligence of Liaoning Province Dalian University of TechnologyDalian 116024China

De Casteljau algorithm and degree elevation of Bézier and NURBS curves/surfaces are two important techniques in computer aided geometric design. This paper presents the de Casteljau algorithm and degree elevation of toric surface patches, which include tensor product and triangular rational Bézier surfaces as special cases. Some representative examples of toric surface patches with common shapes are illustrated to verify these two algorithms. Moreover, the authors also apply the degree elevation of toric surface patches to isogeometric analysis. And two more examples show the effectiveness of proposed method.

关键词： De Casteljau algorithm degree elevation depth elevation isogeometric analysis toric surface patches

Agrobacterium tumefaciens-mediated genetic transformation of the phytopathogenic fungus Penicillium digitatum

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2008年第10期9卷 823-828页

作者： ji-ye WANG Hong-ye LI Institute of Biotechnology Zhejiang University Hangzhou 310029 China

Agrobacterium tumefaciens-mediated transformation (ATMT) system was assessed for conducting insertional mutagenesis in Penicillium digitatum, a major fungal pathogen infecting post-harvest citrus fruits. A transformation efficiency of up to 60 transformants per 106 conidia was achieved by this system. The integration of the hph gene into the fungal genome was verified by polymerase chain reaction (PCR) amplification and sequencing. These transformants tested were also shown to be mitotically stable. Southern blot analysis of 14 randomly selected transformants showed that the hph gene was randomly integrated as single copy into the fungal genome of P. digitatum. Thus, we conclude that ATMT of P. digitatum could be used as an alter-natively practical genetic tool for conducting insertional mutagenesis in P. digitatum to study functional genomics.

关键词： Penicillium digitatum Agrobacterium tumefaciens-mediated transformation (ATMT) Hygromycin B resistance gene lnsertional mutagenesis

DEGREE ELEVATION AND KNOT INSERTION FOR GENERALIZED BEZIER SURFACES AND THEIR´APPLICATION TO ISOGEOMETRIC ANALYSIS

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 2024年第5期42卷 1197-1225页

作者： Mengyun Wang ye ji Chungang Zhu School of Mathematical Sciences Dalian University of TechnologyDalian 116024China Key Laboratory for Computational Mathematics and Data Intelligence of Liaoning Province Dalian 116024China

Generalized B´ezier surfaces are a multi-sided generalization of classical tensor product B´ezier surfaces with a simple control structure and inherit most of the appealing properties from B´ezier ***,the original degree elevation changes the geometry of generalized B´ezier surfaces such that it is undesirable in many applications,*** *** this paper,we propose an improved degree elevation algorithm for generalized B´ezier surfaces preserving not only geometric consistency but also parametric *** on the knot insertion of B-splines,a novel knot insertion algorithm for generalized B´ezier surfaces is also *** the proposed algorithms are employed to increase degrees of freedom for multi-sided computational domains parameterized by generalized B´ezier surfaces in isogeometric analysis,corresponding to the traditional p-,h-,and *** examples demonstrate the effectiveness and superiority of our method.

关键词： Generalized Bézier surface Degree elevation Knot insertion Isogeometric analysis Refinement

Curvature-Based r-Adaptive Isogeometric Analysis with Injectivity-Preserving Multi-Sided Domain Parameterization

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

Journal of Systems Science & Complexity 2023年第1期36卷 53-76页

作者： ji ye WANG Mengyun YU Yingying ZHU Chungang School of Mathematical Sciences Dalian University of TechnologyDalian 116024China Key Laboratory for Computational Mathematics and Data Intelligence of Liaoning Province Dalian 116024China School of Mathematics Liaoning Normal UniversityDalian 116029China

Inspired by the r-refinement method in isogeometric analysis,in this paper,the authors propose a curvature-based r-adaptive isogeometric method for planar multi-sided computational domains parameterized by toric surface *** authors construct three absolute curvature metrics of isogeometric solution surface to characterize its gradient information,which is more straightforward and *** proposed method takes the internal weights as optimization variables and the resulting parameterization is analysis-suitable and injectivity-preserving with a theoretical *** PDEs are solved over multi-sided computational domains parameterized by toric surface patches to demonstrate the effectiveness and efficiency of the proposed method.

关键词： Isogeometric analysis parameterization r-adaptive toric surface patches

Unconstrained Optimization Reformulations of Equilibrium Problems

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2009年第3期25卷 343-354页

作者： Li Ping ZHANG ji ye HAN w Department of Mathematical Sciences Tsinghua University Beijing 100084 P. R. China Institute of Applied Mathematics Academy of Mathematics & Systems Science Chinese Academy of Sciences Beijing 100190 P. R. China

We generalize the D-gap function developed in the literature for variational inequalities to a general equilibrium problem （EP）. Through the D-gap function, the equilibrium problem is cast as an unconstrained minimization problem. We give conditions under which any stationary point of the D-gap function is a solution of EP and conditions under which it provides a global error bound for EP. Finally, these results are applied to box-constrained EP and then weaker conditions are established to obtain the desired results for box-constrained EP.

关键词： equilibrium problems D-gap function error bound unconstrained optimization

A numerical approach to the interaction between airflow and a high-speed train subjected to crosswind

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第7期14卷 482-493页

作者： Tian LI ji-ye ZHANG Wei-hua ZHANG State Key Laboratory of Traction Power Southwest Jiaotong University

Aerodynamic forces and dynamic performances of railway vehicles are coupled and affected by each other. On the one hand, aerodynamic forces change the displacements of a train. On the other hand, displacements affect aerodynamic forces. Based on vehicle-track coupling dynamics and aerodynamics, a numerical approach to the interaction between airflow and a high-speed train is presented in this paper. Aerodynamic forces and dynamic performances of a high-speed train subjected to crosswind were numerically simulated. Results showed that the interaction between airflow and a high-speed train has a significant influence on displacements and aerodynamic forces of the head coach. Therefore, it is necessary to consider the interaction between airflow and a high-speed train subjected to crosswind.

关键词： High-speed train Crosswind Aerodynamics Co-simulation Interaction

Multi-objective optimization design method of the high-speed train head

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第9期14卷 631-641页

作者： Meng-ge YU ji-ye ZHANG Wei-hua ZHANG State Key Laboratory of Traction Power Southwest Jiaotong University

With the continuous improvement of the train speed, the dynamic environment of trains turns out to be aerodynamic domination. Solving the aerodynamic problems has become one of the key factors of the high-speed train head design. Given that the aerodynamic drag is a significant factor that restrains train speed and energy conservation, reducing the aerodynamic drag is thus an important consideration of the high-speed train head design. However, the reduction of the aerodynamic drag may increase other aerodynamic forces (moments), possibly deteriorating the operational safety of the train. The multi-objective optimization design method of the high-speed train head was proposed in this paper, and the aerodynamic drag and load reduction factor were set to be optimization objectives. The automatic multi-objective optimization design of the high-speed train head can be achieved by integrating a series of procedures into the multi-objective optimization algorithm, such as the establishment of 3D parametric model, the aerodynamic mesh generation, the calculation of the flow field around the train, and the vehicle system dynamics. The correlation between the optimization objectives and optimization variables was analyzed to obtain the most important optimization variables, and a further analysis of the nonlinear relationship between the key optimization variables and the optimization objectives was obtained. After optimization, the aerodynamic drag of optimized train was reduced by up to 4.15%, and the load reduction factor was reduced by up to 1.72%.

关键词： High-speed train Multi-objective optimization Parametric model Aerodynamic drag Load reduction factor

Hepatocellular carcinoma: Current situation and challenge

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2019年第4期18卷 303-304页

作者： Zhao Li ji-ye Zhu Department of Hepatobiliary Surgery Peking University People’s HospitalBeijing 100044China Peking University Institute for Organ Transplantation Beijing 100044China Beijing Key Laboratory of Liver Cirrhosis and Liver Cancer Beijing 100044China

Hepatocellular carcinoma(HCC)ranks the fourth cause of cancer-related death worldwide[1].More than 50%newly diagnosed HCC patients are in China,while 70%of them are at advanced stage when they are diagnosed[2].These patients have lost the opportunity of radical surgery and can only receive palliative ***,the modality for these advanced stage HCC patients mainly include:targeted therapy,interventional therapy,chemotherapy,radiotherapy,and immunotherapy.

关键词： chemotherapy patients therapy