检索结果-南通市图书馆

Inversion-free geometric mapping construction: A survey

在线全文

学校读者我要写书评

暂无评论

Computational Visual Media 2021年第3期7卷 289-318页

作者： Xiao-Ming Fu Jian-Ping Su zheng-yu zhao Qing Fang Chunyang Ye Ligang Liu School of Mathematical Sciences University of Science and Technology of ChinaHefeiChina

A geometric mapping establishes a correspondence between two *** no real object has zero or negative volume,such a mapping is required to be *** inversion-free mappings is a fundamental task in numerous computer graphics and geometric processing applications,such as deformation,texture mapping,mesh generation,and *** task is usually formulated as a non-convex,nonlinear,constrained optimization *** methods have been developed to solve this optimization *** well as being inversion-free,different applications have various further *** expand the discussion in two directions to(i)problems imposing specific constraints and(ii)combinatorial *** report provides a systematic overview of inversion-free mapping construction,a detailed discussion of the construction methods,including their strengths and weaknesses,and a description of open problems in this research field.

关键词： inversion-free mapping Jacobian matrix distortion first-order methods second-order methods

Six types of spin solitons in three-component Bose-Einstein condensates

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2024年第6期76卷 57-65页

作者： yu-Hao Wang Ling-zheng Meng Li-Chen zhao School of Physics Northwest UniversityXi'an 710127China School of Science Xi'an Technological UniversityXi'an 710032China Peng Huanwu Center for Fundamental Theory Xi'an 710127China

Exact analytical solutions are good candidates for studying and explaining the dynamics of solitons in nonlinear *** further extend the region of existence of spin solitons in the nonlinearity coefficient space for the spin-1 Bose-Einstein *** types of spin soliton solutions can be obtained,and they exist in different *** analysis and numerical simulation results indicate that three types of spin solitons are stable against weak *** non-integrable properties of the model can induce shape oscillation and increase in speed after the collision between two spin *** results further enrich the soliton family for non-integrable models and can provide theoretical references for experimental studies.

关键词： Bose-Einstein condensate non-integrable spin soliton exact analytical solution

A modified 3D mean strain energy density criterion for predicting shale mixed-mode Ⅰ/Ⅲ fracture toughness

在线全文

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical Engineering 2024年第7期16卷 2411-2428页

作者： Kun zheng Chaolin Wang yu zhao Jing Bi Haifeng Liu College of Civil Engineering Guizhou UniversityGuiyang550025China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China

The fracture toughness of rocks is a critical fracturing parameter in geo-energy exploitation playing a significant role in fracture mechanics and hydraulic *** edge-notched disk bending(ENDB)specimens are employed to measure the entire range of mixed-modeⅠ/Ⅲfracture toughness of Longmaxi *** theoretically interpret the fracture mechanisms,this research first introduces the detailed derivations of three established fracture *** distinguishing the volumetric and distortional strain energy densities,an improved three-dimensional mean strain energy density(MSED)criterion is *** the critical volumetric to distortional MSED ratio decreases,the transition from tensiondominated fracture to shear-dominated fracture is *** results indicate that both peak load and applied energy increase significantly with the transition from pure mode I(i.e.,tension)to pure modeⅢ(i.e.,torsion or tearing)since mode-Ⅲcracking happens in a twisted manner and mode-Ⅰcracking occurs in a coplanar *** macroscopic fracture signatures are consistent with those of triaxial hydraulic *** average ratio of pure mode-Ⅲfracture toughness to pure mode-Ⅰfracture toughness is 0.68,indicating that the obtained mode-Ⅲfracture resistance for a tensionbased loading system is apparent rather than *** to the three mainstream fracture criteria,the present fracture criterion exhibits greater competitiveness and can successfully evaluate and predict mixed-modeⅠ/Ⅲfracture toughness of distinct materials and loading methods.

关键词： Longmaxi shale Hydraulic fracturing Fracture mechanisms Fracture criteria Mixed-modeⅠ/Ⅲfracture toughness Edge-notched disk bending

Special issue on system identiﬁcation and estimation

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

Control Theory and Technology 2024年第2期22卷 147-148页

作者： Weixing zheng Tianshi Chen Chengpu yu Wenxiao zhao Western Sydney University SydneyAustralia The Chinese University of Hong Kong ShenzhenChina Beijing Institute of Technology BeijingChina The Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijingChina

It is our great pleasure and honor to organize this special issue“System Identiﬁcation and Estimation”.System identiﬁcation has been a surprisingly lively and resilient area of research in the control community for many *** grew out of statisticians’interest in time series analysis beginning in the 1940s and became a“regular control topic”in the 1960s,as indicated by theﬁrst IFAC Symposium on System Identiﬁcation held in Prague,Czech Republic,in *** years later,it is still an important area of research in theﬁeld of *** is relevant to ask why the interest in system identiﬁcation has remained so *** answer might be that more and more applications in engineering require mathematical models and the combined use of system identiﬁcation and physical modeling is the basic way to obtain reliable *** special issue is focusing on the latest development,trends,and novel methods for system identiﬁcation and estimation and these contributions will give interesting and inspiring insights into the current status of the area.

关键词： estimation system IFAC

On Utility Maximization with Random Interval Payoffs

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 Quarterly Journal of Mathematics 2012年第3期27卷 424-431页

作者： YOU Su-rong PENG yu-zheng zhao Fei-fei College of Science Donghua University Shanghai 201620 China

This article discusses the problem of utility maximization in a market with random-interval payoffs without short-selling prohibition. A novel expected utility model is given to measure an investor's subjective view toward random interval wealth. Some techniques are proposed to transfer a complex programming involving interval numbers into a simple non-linear programming. Under the existence of the optimal strategy, relations between the optimal strategy and assets' prices are discussed. Some properties of the maximal utility function with respect to the endowment are given.

关键词： random interval payoff acceptable state price vector expected utility optimal strategy

Facile preparation and efficient MnxCoy porous nanosheets for the sustainable catalytic process of soot

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2024年第3期9卷 516-528页

作者： Miaomiao Hu Kun Zhou Tingyi zhao zheng Li Xianhai Zeng Di yu Xuehua yu Mingqin zhao Zhihui Shao Qixiang Xu Bing Cui Flavors and Fragrance Engineering&Technology Research Center of Henan Province College of Tobacco ScienceHenan Agricultural UniversityZhengzhou450002China School of Ecology and Environment Zhengzhou UniversityZhengzhou450001China College of Energy Xiamen UniversityXiamen361102China College of Chemistry and Chemical Engineering Shenyang Normal UniversityShenyang110034China

The pursuit of high-performance is worth considerable effort in catalysis for energy efficiency and environmental sustainability. To develop redox catalysts with superior performance for soot combustion, a series of Mn_(x)Co_(y) oxides were synthesized using MgO template *** method greatly improves the preparation and catalytic efficiency and is more in line with the current theme of green catalysts and sustainable development. The resulting Mn_(1)Co_(2.3) has a strong activation capability of gaseous oxygen due to a high concentration of Co^(3+) and Mn^(3+). The Mn doping enhanced the intrinsic activity by prompting oxygen vacancy formation and gaseous oxygen adsorption. The nanosheet morphology with abundant mesoporous significantly increased the solid–solid contact efficiency and improved the adsorption capability of gaseous reactants. The novel design of Mn_(1)Co_(2.3)oxide enhanced its catalytic performance through a synergistic effect of Mn doping and the porous nanosheet morphology, showing significant potential for the preparation of high-performance soot combustion catalysts.

关键词： Soot combustion Intrinsic activity Contact efficiency Mn doping DFT

High-precision X-ray characterization for basic materials in modern high-end integrated circuit

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2024年第7期45卷 12-24页

作者： Weiran zhao Qiuqi Mo Li zheng Zhongliang Li Xiaowei Zhang yuehui yu National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of ScienceBeijing 100049China

Semiconductor materials exemplify humanity's unwavering pursuit of enhanced performance,efficiency,and functionality in electronic *** its early iterations to the advanced variants of today,this field has undergone an extraordinary *** the reliability requirements of integrated circuits continue to increase,the industry is placing greater emphasis on the crystal ***,conducting a range of characterization tests on the crystals has become *** paper will examine the correlation between crystal quality,device performance,and production yield,emphasizing the significance of crystal characterization tests and the important role of high-precision synchrotron radiation X-ray topography characterization in semiconductor ***,we will cover the specific applications of synchrotron radiation characterization in the development of semiconductor materials.

关键词： X-ray topography synchrotron radiation semiconductor materials crystal defects

Method for detector description conversion from DD4hep to Filmbox

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第9期35卷 115-126页

作者： zhao-Yang yuan Tian-Zi Song yu-Jie Zeng Kai-Xuan Huang yu-Mei Zhang zheng-yun You School of Physics Sun Yat-sen UniversityGuangzhou 510275China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China

DD4hep serves as a generic detector description toolkit recommended for offline software development in next-generation high-energy physics(HEP)***,Filmbox(FBX)stands out as a widely used 3D modeling file format within the 3D software *** this paper,we introduce a novel method that can automatically convert complex HEP detector geometries from DD4hep description into 3D models in the FBX *** feasibility of this method was dem-onstrated by its application to the DD4hep description of the Compact Linear Collider detector and several sub-detectors of the super Tau-Charm facility and circular electron-positron collider *** automatic DD4hep–FBX detector conversion interface provides convenience for further development of applications,such as detector design,simulation,visualization,data monitoring,and outreach,in HEP experiments.

关键词： Detector description DD4hep FBX Geometry Offline software

Hemodialysis bilayer bionic blood vessels developed by the mechanical stimulation of hepatitis B viral X(HBX)genetransfected hepatic stellate cells

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) 2024年第6期25卷 499-512页

作者： Hongyi LIU yuanyuan ZHOU Peng GUO Xiongwei zheng Weibin CHEN Shichao ZHANG yu FU Xu ZHOU zheng WAN Bin zhao Yilin zhao Department of Oncology and Vascular Interventional Radiology Zhongshan Hospital Affiliated to Xiamen UniversitySchool of MedicineXiamen UniversityXiamen 361004China School of Medicine Xiamen UniversityXiamen 361102China Xiamen Health and Medical Big Data Center Xiamen 361008China Fujian Provincial Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma(Zhongshan Hospital Affiliated to Xiamen University) Xiamen 361004China Xiamen Key Laboratory of Cellular Intervention and Interventional Medical Materials Xiamen 361004China

Artificial vascular graft(AVG)fistula is widely used for hemodialysis treatment in patients with renal ***,it has poor elasticity and compliance,leading to stenosis and *** ideal artificial blood vessel for dialysis should replicate the structure and components of a real artery,which is primarily maintained by collagen in the extracellular matrix(ECM)of arterial *** have revealed that in hepatitis B virus(HBV)-induced liver fibrosis,hepatic stellate cells(HSCs)become hyperactive and produce excessive ECM ***,mechanical stimulation can encourage ECM secretion and remodeling of a fiber *** on the above factors,we transfected HSCs with the hepatitis B viral X(HBX)gene for simulating the process of HBV ***,these HBX-HSCs were implanted into a polycaprolactonepolyurethane(PCL-PU)bilayer scaffold in which the inner layer is dense and the outer layer consists of pores,which was mechanically stimulated to promote the secretion of collagen nanofiber from the HBX-HSCs and to facilitate crosslinking with the *** obtained an ECM-PCL-PU composite bionic blood vessel that could act as access for dialysis after ***,the vessel scaffold was implanted into a rabbit’s neck arteriovenous fistula *** exhibited strong tensile strength and smooth blood flow and formed autologous blood vessels in the rabbit’s *** study demonstrates the use of human cells to create biomimetic dialysis blood vessels,providing a novel approach for creating clinical vascular access for dialysis.

关键词： Composite bilayer bionic blood vessel Extracellular matrix(ECM) Hepatic stellate cells(HSCs) Hepatitis B viral X(HBX)gene Mechanical force