检索结果-南通市图书馆

A light-weight high-entropy alloy Al_(20)Be_(20)Fe_(10)Si_(15)Ti_(35)

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

Science China(Technological Sciences) 2018年第2期61卷 184-188页

作者： tseng kokai yang yachu juan chienchang chin tsungshune tsai chewei yeh jienwei department of materials science and engineering 'national'tsing hua universityHsinchu 300TaiwanChina

A light-weight high-entropy alloy （LWHEA） A120Be20Fe10SilsTi35 has been developed to have unique mechanical properties and oxidation resistance. One major and two minor phases are observed in the as-east microstructure. The density of the alloy is 3.91 gcm-3, and its hardness is HV 911, which is higher than quartz. The hardness and hardness to density ratio are the highest of all light-weight alloys reported before. In addition, it has excellent oxidation resistance at 700℃ and 900℃, which far exceeds that of Ti-6A1-4V. Thus, the combination of properties is promising for high-temperature applications, which require light weight, wear-resistant and oxidation-resistant components.

关键词： high-entropy alloy light weight low density oxidation resistance

Successful Integration of Partial FGD and SCR at Sinter Plant in China Steel Corporation

在线全文

学校读者我要写书评

暂无评论

Successful Integration of Partial FGD and SCR at Sinter Plan...

A lightweight authentication scheme with user untraceability

“第十届中国钢铁年会”暨“第六届宝钢学术年会”

作者： Yu-Bin hong Po-Yi yeh Sinter Session of Iron –making Department in China Steel Corporation

End-of-pipe technology for flue gas treatment to remove NO x,DXN,and SO x is successfully exercised at sinter plant in China Steel Corporation（CSC）.As for removal of NO x and DXN,Selective Catalytic Reduction（SCR）was adopted in ***,the SCR process combined FGD（Flue Gas Desulphurization）at sinter plant was developed for reduction of SO x *** has evaluated the investment,limited space,residual disposal,saving energy,removal efficiency and operation *** corporation of design,construction and commissioning are executed by design and engineering department,research department and operation department in CSC ***,partial FGD process including wet-method absorber,Gas/Gas heater,electrostatic precipitator,booster fan and switched damper of wind-box was established.40 percent of flue gas with high SO x concentration are desulphurized thought the FGD,the rest of the untreated flue gas are mixed together to *** 2013,friendly,environmental sintering process is fulfill successfully to minimize the NO x,DXN,and SO x emission by means of integration of existing SCR and partial FGD at No.4 sinter plant in CSC.

关键词： end-of-pipe technology SO x NO x SCR p FGD

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Frontiers of Information Technology & Electronic Engineering 2015年第4期16卷 259-271页

作者： Kuo-Hui yeh Department of Information Management National Dong Hwa University Taiwan 974 Hualien

With the rapid growth of electronic commerce and associated demands on variants of Internet based applications,application systems providing network resources and business services are in high demand around the *** guarantee robust security and computational efficiency for service retrieval,a variety of authentication schemes have been ***,most of these schemes have been found to be lacking when subject to a formal security ***,Chang et al.(2014) introduced a formally provable secure authentication protocol with the property of ***,based on our analysis,the proposed scheme fails to provide the property of user-untraceability as claimed,and is insecure against user impersonation attack,server counterfeit attack,and man-in-the-middle *** this paper,we demonstrate the details of these malicious attacks.A security enhanced authentication scheme is proposed to eliminate all identified weaknesses.

关键词： Authentication Privacy Security Smart card Untraceability

Combustion Synthesis of SiO_2 on the Aluminum Plate

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2001年第1期10卷 92-96,78页

作者： C.L.yeh E.Zhao 等 Dept.ofMechanicalEngineering Da－YehUniversityChang－Hwa51505Taiwan Dept.ofMechanicalEngineering Da－Y

The approach of utilizing combustion synthesis to make fine particles of SiO2, A12O3 and TiO2 is a quite modern technology. Through the chemical reaction in post-flame region, fine SiO2 particles can be formed with high purity on plate surface. Therefore, the combustion synthesis of SiO2 powders is an important area for further research and development especially for the application of SiO2 in the semiconductor industry. This investigation proposes an experimental approach （i.e., a gas-phase combustion synthesis） using two different kinds of organic compounds, Hexamethyldisilazane （HMDSA） and Hexamethyldisioxane （HMDSO）, as the silicon precursors. A premixed gas burner is chosen with C3H8 as fuel air as oxidant and part of the air was used as the carrying gas to entrain HMDSA/HMDSO vapor into the combustible mixture. Observations show that the C3H8/air flame changed color from a pale-blue flame to light yellow and then orange when different amounts of precursors were introduced. Through the chemical reaction in the post-flame region, fine SiO2 particles were formed in the gas phase and then quenched and collectal on an aluminum flat plate. The objective of this paper is to study the effects of HMDSO and HMDSA concentrations and flame temperatures on the synthesis of SiO2 particles.

关键词： combustion synthesis Hexamethyldisilazane Hexamethyldisioxane.

Exploring the growth value equity valuation model with data visualization

在线全文

学校读者我要写书评

暂无评论

Financial Innovation 2023年第1期9卷 19-55页

作者： I‑Cheng yeh Yi‑Cheng Liu Department of Civil Engineering Tamkang University151 Yingzhuan Rd.Tamsui Dist.New Taipei City 25137Taiwan Department of International Business Tamkang University151 Yingzhuan Rd.Tamsui Dist.New Taipei City 25137Taiwan

The Growth Value Model(GVM)proposed theoretical closed form formulas consist-ing of Return on Equity(ROE)and the Price-to-Book value ratio(P/B)for fair stock prices and expected rates of *** regression analysis can be employed to verify these theoretical closed form formulas,they cannot be explored by classical quintile or decile sorting approaches with intuition due to the essence of multi-factors and dynamical *** article uses visualization techniques to help intuitively explore *** discerning findings and contributions of this paper is that we put forward the concept of the smart frontier,which can be regarded as the reasonable lower limit of P/B at a specific ROE by exploring fair P/B with ROE-P/B 2D dynamical process *** coefficients in the formula can be determined by the quantile regression analysis with market *** moving paths of the ROE and P/B in the cur-rent quarter and the subsequent quarters show that the portfolios at the lower right of the curve approaches this curve and stagnates here after the portfolios are ***,exploring expected rates of return with ROE-P/B-Return 3D dynamical process visualization,the results show that the data outside of the lower right edge of the“smart frontier”has positive quarterly return rates not only in the t+1 quarter but also in the t+2 *** farther away the data in the t quarter is from the“smart frontier”,the larger the return rates in the t+1 and t+2 quarter.

关键词： Data visualization Stock prices Rates of return Return on equity Price-tobook value ratio

ECONOMIC GLOBALIZATION AND ITS IMPACTS ON URBAN SYSTEM IN CHINA

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 Geographical Sciences 1996年第1期6卷 1-17页

作者： Xu Xueqiang Zhang Rong(Center for Urban and Rogional Studies, ZhongShan University, Guangzhou 510275People’s Republic of China)Anthony Gar-on yeh(Canter of Urban Planning and Environmental Management, University of hong Kong, hong Kong) Ctr for Urban + Regional Studies Zhongshan Univ Guangzhou 510275 China

With the implementation of economic reform and open policy, China has expanded her foreign trade, utilized a lot of foreign investment, and thethere its economy has been increasingly integrated into world economy. Because the coastal region is different in the level of socio-economic development, location and accessibility from inland region, the former has got more opporturuties of development. In the coastal region, the ekisting urban clusters are spreading and new ones are appearing. However, a large floating population, traffic jam, sprawl spread in urban land use and environmental pollution have become serious problems in coastal cities.

关键词： economic globalization urban system coastal region

Co-doping Effect on Microstructures and Ionic Conductivity of Aliovalent Cations Modified Ceria

在线全文

学校读者我要写书评

暂无评论

材料科学与工程学报 2007年第6期25卷 861-863页

作者： yeh Tsung-her CHOU Chen-chia Advanced Ceramics Laboratory Department of Mechanical EngineeringNational Taiwan University of Science and TechnologyTaipei-10672China

Microstructural features and ionic conductivity of divalent(Mg 2+)and trivalent(Gd 3+)cations co-doped ceria electrolyte system Ce_ 0.8-xGd_ 0.2Mg_xO_ 1.9-x were investigated by scanning electron microscopy(SEM)and AC impedance *** experimental results exhibit that addition of MgO to GDC reduces the average binding energy of GDC by decreasing the energy barrier of oxygen ion migration in ceria matrix and the ionic conductivity of 2 mol% magnesium doped GDC(0.018 S/cm)is higher than that of GDC matrix at 650℃(0.0105 S/cm).Co-doping Mg 2+ and Gd 3+ is found to increase the ionic conductivity of ceria and hence decreases the operation temperature as well as the cost of solid oxide fuel cell(SOFC).

关键词：钴掺杂离子电导性改良铈固体氧化物燃料电池结合能电解质

Innovations in the diagnosis and management of uveitis: promising research to address unmet patient needs

在线全文

学校读者我要写书评

暂无评论

Annals of Eye Science 2022年第1期7卷 1-7页

作者： Steven yeh Ye Huang Joanne Thomas Truhlsen Eye Institute University of Nebraska Medical CenterOmahaNEUSA Emory Eye Center Emory University School of MedicineAtlantaGAUSA Medical College of Georgia AugustaGAUSA.

Uveitis,or inflammation of the uveal tissues(iris,ciliary body and the choroid),and its contiguous structures,can lead to severe visual impairment and is among the leading causes of vision impairment worldwide(1).In clinical practice,specialists in uveitis and ocular immunology are called upon to manage a range of uveitis syndromes-infectious disease,noninfectious autoimmune conditions,and masquerade syndromes such as ***,ophthalmologists of all subspecialties(i.e.,medical and surgical retina,corneal surgeons,orbital/oculoplastic surgeons,and comprehensive ophthalmologists)are called upon to manage uveitis syndromes,emphasizing clear importance to understanding common uveitis syndromes,diagnostic workups,and the state-of-the-art in uveitis and ocular inflammation care.

关键词： uveitis inflammation diagnosis

Efficient and secure three-party authenticated key exchange protocol for mobile environments

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 Zhejiang University-Science C(Computers and Electronics) 2013年第5期14卷 347-355页

作者： Chih-ho CHOU Kuo-yu TSAI Tzong-chen WU Kuo-hui yeh Department of Information Management National Taiwan University of Science and Technology Department of Management Information Systems Hwa Hsia Institute of Technology Department of Information Management National Dong Hwa University

Yang and Chang (2009) proposed a three-party authenticated key exchange protocol for securing communications in mobile-commerce environments. Their protocol reduces computation and communication costs by employing elliptic curve cryptosystems. However, Tan (2010) pointed out that Yang and Chang (2009)'s protocol cannot withstand impersonation and parallel attacks, and further proposed an enhanced protocol to resist these attacks. This paper demonstrates that Tan (2010)'s approach still suffers from impersonation attacks, and presents an efficient and secure three-party authenticated key exchange protocol to overcome shown weaknesses.

关键词： Three-party Key exchange Authentication Mobile environments