检索结果-南通市图书馆

Computer Systems science & Engineering 2024年第3期48卷 813-833页

作者： Kai Gao Chin-Chen Chang Chia-Chen Lin Department of Information Engineering and Computer science Feng Chia UniversityTaichung407Taiwan Department of Computer science and Information Engineering National Chin-Yin University of TechnologyTaichung411Taiwan

Reversible data hiding is a confidential communication technique that takes advantage of image file characteristics,which allows us to hide sensitive data in image *** this paper,we propose a novel high-fidelity reversible data hiding *** on the advantage of the multipredictor mechanism,we combine two effective prediction schemes to improve prediction *** addition,the multihistogram technique is utilized to further improve the image quality of the stego ***,a model of the grouped knapsack problem is used to speed up the search for the suitable embedding bin in each *** results show that the quality of the stego image of our scheme outperforms state-of-the-art schemes in most cases.

关键词： Data hiding multipredictor mechanism high-fidelity knapsack problem

Chinese herbal medicine decreases incidence of hepatocellular carcinoma in diabetes mellitus patients with regular insulin management

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2024年第3期16卷 716-731页

作者： Hsiang-Chun Lai Ju-Chien Cheng Hei-Tung Yip Long-Bin Jeng Sheng-Teng Huang Graduate Institute of Chinese Medicine School of Chinese MedicineCollege of Chinese MedicineChina Medical UniversityTaichung 404328TaiwanChina Department of Medical Laboratory science and Biotechnology China Medical UniversityTaichung 404TaiwanChina Management Office for Health Data China Medical University HospitalTaichung 404327TaiwanChina Organ Transplantation Center China Medical University HospitalTaichung 40447TaiwanChina Department of Chinese Medicine China Medical University HospitalSchool of Chinese MedicineChina Medical UniversityTaichung 40447TaiwanChina

BACKGROUND Type 2 diabetes mellitus(DM)is an independent risk factor for hepatocellular carcinoma(HCC),while insulin is a potent *** a new therapeutic modality for preventing insulin users from developing HCC is a critical goal for *** To investigate whether regular herbal medicine use can decrease HCC risk in DM patients with regular insulin *** We used data acquired from the Taiwan,Chinaese national Health Insurance research database between 2000 and *** identified patients with DM who were prescribed insulin for>3 *** herb user group was further defined as patients prescribed herbal medication for DM for>3 months per annum during RESULTS We initially enrolled 657144 DM patients with regular insulin use from 2000 to *** these,46849 patients had used a herbal treatment for DM,and 140547 patients were included as the matched control *** baseline variables were similar between the herb users and *** patients with regular herb use had a 12%decreased risk of HCC compared with the control group[adjusted hazard ratio(aHR)=0.88,95%CI=0.80–0.97].The cumulative incidence of HCC in the herb users was significantly lower than that of the *** with a herb use of>5 years cumulatively exhibited a protective effect against development of HCC(aHR=0.82,P<0.05).Of patients who developed HCC,herb users exhibited a longer survival time than nonusers(aHR=0.78,P=0.0001).Additionally,we report the top 10 herbs and formulas in prescriptions and summarize the potential pharmacological effects of the *** analysis indicated that Astragalus propinquus(Huang Qi)plus Salvia miltiorrhiza Bunge(Dan Shen),and Astragalus propinquus(Huang Qi)plus Trichosanthes kirilowii Maxim.(Tian Hua Fen)were the most frequent combination of single ***,Ji Sheng Shen Qi Wan plus Dan Shen was the most frequent combination of herbs and *** This large-scale retrospective cohort study reveals th

关键词： Hepatocellular carcinoma Diabetes mellitus Insulin Herb Taiwan,Chinaese national health insurance research database

Optimality Analysis of Sensor-Target Geometries for Bearing-Only Passive Localization in Three Dimensional Space

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 Electronics 2016年第2期25卷 391-396页

作者： ZHONG Yu WU Xiaoyan HUANG Shucai LI Chengjing WU Jianfeng Air and Missile Defense College Air Force Engineering University

Optimality analysis of sensor to target observation geometry for bearing-only passive localization is of practical significance in engineering and military applications and this paper generalized predecessors' researches in two-dimensions into three dimensional space. Based on the principles of Cramer-Rao lower bound(CRLB), Fisher information matrix(FIM) and the determinant of FIM derived by Cauchy-Binet formula, this paper configured the optimal observation geometry resulted from maximizing the determinant of FIM. Optimal observation geometry theorems and corresponding propositions were proved for N ≥ 2 sensors in three dimensions. One conjecture was proposed, i.e., when each range of N(N ≥ 4) sensors to the single target is identical, configuring the optimal geometry is equivalent to distributing N points uniformly on a unit sphere, which is one of the worldwide difficult problem. Studies in this paper can provide helpful reference for passive sensor deployment, route planning of detection platform and so on.

关键词： Bearing-only passive localization Optimal observation geometry Cramer-Rao lower bound(CRLB) Fisher information matrix(FIM) Distributing uniformly points on a Sphere conjecture

Nanohybrid TiO_2/carbon black sensor for NO_2 gas

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

China Particuology 2007年第3期5卷 225-229页

作者： Wei-Jen Liou Department of Materials Engineering Tatung University Taipei 104 Taiwan China

A nanohybrid sensor of nanosized TiO2-coated carbon black particles, prepared by sol-gel technology for the detection of NO2 gas, has been developed. The response of the electric resistance of the hybrid sensor to NO2 concentration is investigated, showing that the sensitivity of the hybrid sensor is raised as certain ratio of the TiO2 content in the sensor. Easy and cheap to fabricate, the hybrid TiO2/carbon black promises to be a practical sensor for detecting NO2 gas. 2007 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of sciences. Published by Elsevier B.V.

关键词： Carbon black TiO2 Gas sensing Hybrid

AN ECO- AND INNO-PRODUCT DESIGN SYSTEM APPLYING INTEGRATED AND INTELLIGENT QFDE AND TRIZ METHODOLOGY

在线全文

学校读者我要写书评

暂无评论

Journal of Systems science and Systems Engineering 2011年第4期20卷 443-459页

作者： Amy J.C. TRAPPEY Jerry J.R. OU Gilbert Y.P. LIN Meng-Yu CHEN Department of Industrial Engineering and Engineering Management National Tsing Hua University Taiwan China Department of Industrial Engineering and Management National Taipei University of Technology Taiwan China Department of Business Administration Southern Taiwan University Taiwan China

The green environmental laws and regulations are legislated, implemented, and enforced in many countries and economic regions. The provision of green products and services are the fast growing trend in global consumer markets. Therefore, introducing new products with environmental considerations becomes critical for global brand manufacturers. This research depicts an integrated and intelligent eco- and inno-product design methodology to support environmental friendly green product development. The methodology adopts approaches, such as life cycle assessment （LCA）, quality function deploymnet for environement （QFDE）, theory of inventive problem solving （TRIZ） and back-propagation network （BPN） to achieve eco- and inno-design objectives. LCA evaluates and compares the environmental impacts of production. QFDE transforms high-level concerns of environment into design requirements. When there are many historical QFDE data, the BPN prediction model is trained and deployed to automate the specifications of green design improvement. TRIZ is to support the creation of innovative product design ideas effectively and efficiently during the concept design stage. Finally, this paper presents two eco-design cases of power adaptor to demonstrate the proposed methodology.

Comparison between oxide-reduced and water-atomized copper powders used in making sintered wicks of heat pipe

在线全文

学校读者我要写书评

暂无评论

China Particuology 2007年第3期5卷 220-224页

作者： Liu-Ho Chiu Chang-Hui Wu Pee-Yew Lee Department of Materials Engineering Tatung University Taipei 10451 Taiwan China Institute of Materials Engineering Taiwan Ocean University Keelung Taiwan China

Oxide-reduced copper powder can be produced efficiently at low cost. The volume shrinkage, porosity, maximum pore size, permeability and thermal conductivity of wicks sintered from two oxide-reduced （OR） powders were compared with one from water-atomized （WA） powder. The green specimens were sintered at temperatures from 800 to 1000 ℃ in a tube furnace under a reduction stream of 10% hydrogen and 90% argon. The results show that the property variations of OR - 100 and WA wicks due to porosity changes have a similar tendency and range. Nine hundred degree celsius is a recommended sintering temperature for producing ideal wicks for use in heat pipes. A smaller maximum pore size can be obtained by increasing the green density.2007 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of sciences. Published by Elsevier B.V.

关键词： Sintered wick Copper powder Porous property Oxide-reduced powder

Analytical modeling for colloid-facilitated transport of N-member radionuclides chains in the fractured rock

在线全文

学校读者我要写书评

暂无评论

Nuclear science and Techniques 2007年第6期18卷 336-343页

作者： TIEN Neng-Chuan JEN Chun-Ping Energy and Environment Research Laboratories Industrial Technology Research Institute Hsinchu 310 Taiwan Department of Mechanical Engineering National Chung Cheng University Chia Yi 62102 Taiwan

A precious analytical model for N-member radionuclide decay chains has been extended to include the ef- fect of radionuclide sorption with groundwater *** distribution coefficients were employed in the nu- clide decay chain to illustrate the present *** colloid concentration was assumed constant in time and space owing to equilibrium between colloid generation and sedimentation by chemical and/or physical ***- thermore,the diffusion of colloids into the rock matrix was ignored because the diameter of colloid is relatively large and colloids and fracture surfaces are *** results indicated that colloids could facilitate the transport of radionuclides and the large adsorbability of nuclides with colloids enlarged the effect of acceleration by *** influence of colloids on the radionuclide transport was expected to be crucial to the actinides with large adsorbability; however,the present results revealed that the low-adsorbing nuclides whose parent nuclides have large capability of sorption could be also facilitated significantly by colloids ***,the role of colloids played in the transport of the radionuclides decay chain should be assessed carefully in the radioactive waste *** analyti- cal method presented herein is helpful to verify/validate further complex far-field models.

关键词：分析模型放射性核素氮元素同位素

Effective N-methyl-2-pyrrolidone wet cleaning for fabricating highperformance monolayer MoS2 transistors

在线全文

学校读者我要写书评

暂无评论

Nano Research 2019年第2期12卷 303-308页

作者： Po-Chun Chen Chih-Pin Lin Chuan-Jie Hong Chih-Hao Yang Yun-Yan Lin Ming-Yang Li Lain-Jong Li Tung-Yuan Yu Chun-Jung Su Kai-Shin Li Yuan-Liang Zhong Tuo-Hung Hou Yann-Wen Lan Department of Physics "National Taiwan Normal University" Taipei 11677 Taiwan China Department of Electronics Engineering and Institute of Electronics "National Chiao Tung University' Hsinchu 30010 Taiwan China Department of Physics and Center for Nanotechnology Chung Yuan Christian University Chungli 32023 Taiwan China Research Center for Applied sciences Academia Siriica: Taipei 11529 Taiwan China Physical Sci. and Eng. King Abdullah University of Sci.and Technology Thuwal 23955 Kingdom of Saudi Arabia "national Nano Device Laboratories:"national Applied Research Laboratories" Hsinchu 30078 Taiwan China

Two-dimensional semiconductors,such as MoS2 are known to be highly susceptible to diverse molecular adsorbates on the surface during fabrication,which could adversely affect device *** ensure high device yield,uniformity and performance,the semiconductor industry has long employed wet chemical cleaning strategies to remove undesirable surface contaminations,adsorbates,and native oxides from the surface of Si wafers.A similarly effective surface cleaning technique for two-dimensional materials has not yet been fully *** this study,we propose a wet chemical cleaning strategy for MoS2 by using *** cleaning process not only preserves the intrinsic properties of monolayer MoS2,but also significantly improves the performance of monolayer MoS2 *** device on current of 12 μA·μm-1 for a channel length of 400 nm,contact resistance of 15 kΩ·μm,field-effect mobility of 15.5 cm^2·V^-1·s^-1,and the average on-off current ratio of 10^8 were successfully demonstrated.

关键词： monolayer M0S2 devices standard wet cleaning field-effect transistors N-methyl-2-pyrrolidone

Numerical study on shock-accelerated heavy gas cylinderswith diffusive interfaces

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2019年第4期35卷 750-762页

作者： Dongdong Li Ben Guan Ge Wang College of Aerospace and Civil Engineering Harbin Engineering University Harbin 150001 China

Interactions of shock wave and heavy gas cylinders with different diffusive interfaces are numerically investigated. Comparisons among these interfaces are made in terms of cylinder morphology, wave system evolution, fluids mixing, and circulation generation. Navier-Stokes equations are solved in the present work to simulate the complex multi-fluid flow. The fifth-order weighted essentially non-oscillatory scheme is used to compute the numerical flux. The influence of interface diffusion is revealed by the numerical results. The cylinders with similar geometric scale but different diffusion interface have great similarities in the hydrodynamic characteristics, including the interface morphology, shock focusing and molecular mixing, as well as circulation deposition. For the cases with more serious interface diffusion, the cylinder develops into more regular vortex pairs. The diffusive interface greatly mitigates the strength of the reflected shock wave and weakens the shock focusing capability. Some interface structural features are also recorded and analyzed. The diffusive interface brings about slower molecular mixing and less circulation generation. The circulation deposition on different interfaces is quantitatively investigated and compared with the theoretical models. The theoretical models are found to be applicable to the scenarios of diffusive interfaces.

关键词： Shock bubble interaction Interfacial instability Diffusive interface Circulation model

Polycrystalline ZnSx Se1—x thin films deposited on ITO glass by MBE

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 Zhejiang University science 2003年第2期4卷 131-135页

作者：沈大可 SOUI.K. 韩高荣杜丕一阙端麟 DepartmentofPhysics HongKongUniversityofScienceandTechnologyHongKongChina StateKeyLaboratoryofSiliconMaterialscience ZhejiangUniversityHangzhou310027China

MBE growth of ZnSx Se1-x thin films on ITO coated glass substrates were carried out using ZnS and Se Sources with the substrate temperature ranging from 270℃ to 330℃.The XRD θ/2θ spectra resulted from these films indicated that the as-grown polycrystalline ZnSx Se1-x thin films had a preferred orientation along the (111) *** evaluated crystal sizes as deduced from the FWHM of the XRD layer peaks showed strong growth temperature dependence,with the optimized temperature being about 290℃.Both AFM and TEM measurements of these thin films also indicated a similar growth temperature *** qual-ity ZnSx Se1-x thin film growm at the optimized temperature had the smoothest surface with lowest RMS valus of 1.2 nm and TEM cross-sectional micrograph showing a well defined columnar structure.

关键词：多晶薄膜分子束取向薄膜生长薄膜结构锌硫硒半导体薄膜氧化铟玻璃