检索结果-南通市图书馆

Simultaneously enhancing the hot workability and room-temperature strength of Ti-6Al-4V alloy via adding Mo and Fe

Journal of Materials Science & Technology 2024年第13期180卷 32-44页

作者： Jie Shen zhihao zhang Jianxin Xie Beijing Laboratory of Metallic Materials and Processing for Modern Transportation Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Key Laboratory for Advanced Materials Processing(MOE) University of Science and Technology BeijingBeijing 100083China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China

Reducing the hot working temperature and high-temperature deformation resistance of titanium alloy to improve hot rolling and hot extrusion workability of products with thin walls and complex section shapes has always been an important topic in the field of titanium alloy *** paper proposed a strategy of adding Mo and Fe elements to simultaneously reduce the hot working temperature and high-temperature deformation resistance of Ti-6Al-4V *** effects of Mo and Fe contents on the mi-crostructure,β transus temperature(Tp),and high-temperature flow stress(HFS)of Ti-6Al-4V-xMo-xFe(x=0-5)alloys were *** results showed that adding Mo and Fe can substantially reduce the Tp and HFS of the alloy,and greatly improve its room-temperature *** with com-mercial Ti-6Al-4V samples,the T_(β) of Ti-6Al-4V-2Mo-2Fe and Ti-6Al-4V-3Mo-3Fe samples was decreased by 68-98 ℃,and the HFS at 800-900 ℃ was decreased by 37.8%-46.0%.Compared with hot-rolled Ti-6Al-4V samples,the room-temperature tensile strength of hot-rolled Ti-6Al-4V-2Mo-2Fe samples was increased by about 30%,while the elongation hardly *** increased strength was mainly at-tributed to fine grain strengthening and solid solution *** hot workability and room-temperature strength of Ti-6Al-4V alloy can be significantly improved by adding 2-3 wt.%Mo and Fe simultaneously.

关键词： Titanium alloy High-temperature flow stress Hot workability Room-temperature strength

来源：

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

Updates on CRISPR-based gene editing in HIV-1/AIDS therapy

引用

Virologica Sinica 2022年第1期37卷 1-10页

作者： zhihao zhang Wei Hou Shuliang Chen Institute of Medical Virology School of Basic Medical SciencesWuhan UniversityWuhan430071China

Although tremendous efforts have been made to prevent and treat HIV-1 infection,HIV-1/AIDS remains a major threat to global human *** combination antiretroviral therapy(cART),although able to suppress HIV-1 replication,cannot eliminate the proviral DNA integrated into the human genome and thus requires lifelong treatment that may lead to various side *** recent years,clustered regularly interspaced short palindromic repeat(CRISPR)-associated nuclease 9(Cas9)related gene-editing systems have been developed and designed as effective ways to treat HIV-1 ***,new gene-targeting tools derived from or functioning like CRISPR/Cas9,including base editor,prime editing,SHERLOCK,DETECTR,PAC-MAN,ABACAS,pfAGO,have been developed and optimized for pathogens detection and diseases ***,we summarize recent studies on HIV-1/AIDS gene therapy and provide more gene-editing targets based on studies relating to the molecular mechanism of HIV-1 *** also identify the strategies and potential applications of these new gene-editing technologies for HIV-1/AIDS treatment in the ***,we discuss the caveats and problems that should be addressed before the clinical use of these versatile CRISPR-based gene targeting ***,we offer alternative solutions to improve the practice of gene targeting in HIV-1/AIDS gene therapy.

关键词： HIV-1/AIDS CRISPR/Cas9 Gene editing Gene therapy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Examination of two-phase behaviors in porous media during pool boiling

引用

Science China(Technological Sciences) 2024年第6期67卷 1695-1713页

作者： zhang zhihao GUAN ShuYa WU Rui ZHAO ChangYing School of Mechanical Engineering Shanghai Jiao Tong University

The enhancement of pool boiling heat transfer using porous media has been extensively *** the two-phase distribution and evolution in porous media are crucial to the heat transfer performance,including the critical heat flux(CHF)and heat transfer coefficient(HTC),direct observation of the two-phase flow inside the media is limited owing to the blockage of the direct view from the porous *** this study,pool boiling visualization experiments were conducted on porous samples with different throat widths in deionized *** results showed that the HTC increased with the throat ***,the growth-contraction cycle of the vapor region and the formation and drying of the wall liquid film inside the porous media were *** vapor region,including the maximum and minimum areas in the boiling cycle,was quantitatively ***,the relationship between the minimum gas-phase area and HTC peak was identified.A one-dimensional transient model was developed considering solid skeleton heat conduction,liquid film evaporation,and vapor region growth to quantitatively study the influence of heat flux on the internal two-phase *** model successfully captured the maximum gas-phase area,duration of boiling cycles,and HTC trends at specific heat *** results of this quantitative study provide insights into the internal two-phase distribution and evolution induced by pool boiling.

关键词： porous media two-phase behaviors pool boiling

来源：

维普期刊数据库

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Reduced Methane Combustion Mechanism and Verification,Validation,and Accreditation(VV&A)in CFD for NO Emission Prediction

引用

Journal of Thermal Science 2021年第2期30卷 610-623页

作者： SUN Jihao zhang zhihao LIU Xiao ZHENG Hongtao College of Power and Energy Engineering Harbin Engineering UniversityHarbin 150001China

In order to obtain a reduced methane combustion mechanism for predicting combustion field and pollutants accurately in CFD simulations with a lower computational cost,a reduced mechanism with 22 species and 65 steps of reactions from GRI-Mech 3.0 was obtained by direct relation graph method and sensitivity *** ideal reactor calculation and VV&A(Verification,Validation,and Accreditation)in CFD were carried out using the proposed *** results showed that the proposed mechanism agrees well with the detailed mechanism in a wide range of operating conditions;the temperature field and species can be predicted accurately in CFD simulations(RANS and LES models),and the NO prediction error of an industrial gas turbine combustor outlet is less than 2×*** proposed mechanism has high engineering values.

关键词： mechanism reduction pollutant emissions direct relation graph method sensitivity analysis numerical simulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Research on consensus of multi-agent systems with and without input saturation constraints

引用

Journal of Systems Engineering and Electronics 2021年第4期32卷 947-955页

作者： QI Duo HU Junhua LIANG Xiaolong zhang Jiaqiang zhang zhihao Air Traffic Control and Navigation College Air Force Engineering UniversityXi’an 710051China Shaanxi Province Lab.of Meta-Synthesis for Electronic&Information System Xi’an 710051China Aeronautical Engineering College Air Force Engineering UniversityXi’an 710038China

In recent years,with the continuous development of multi-agent technology represented by unmanned aerial vehicle(UAV)swarm,consensus control has become a hot spot in academic *** this paper,we put forward a discrete-time consensus protocol and obtain the necessary and sufficient conditions for the second-order consensus of the second-order multi-agent system with a fixed structure under the condition of no saturation *** theoretical derivation verifies that the two eigenvalues of the Laplacian of the communication network matrix and the sampling period have an important effect on achieving *** we construct and verify sufficient conditions to achieve consensus under the condition of input saturation *** results show that consensus can be achieved if velocity,position gain,and sampling period satisfy a set of inequalities related to the eigenvalues of the Laplacian ***,the accuracy and validity of the theoretical results are proved by numerical simulations.

关键词： multi-agent system consensus control input constraint distributed control

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Improved Plasticity and Cold-rolling Workability of Fe–6.5wt%Si Alloy by Warm-rolling with Gradually Decreasing Temperature

引用

Journal of Materials Science & Technology 2016年第5期32卷 477-484页

作者： Yuanke Mo zhihao zhang Hongjiang Pan Jianxin Xie Key Laboratory for Advanced Material Processing of Ministry of Education Institute for Advanced Materials and TechnologyUniversity of Science and Technology Beijing

The effects of warm-rolling process on the microstructure, ordering, mechanical properties and cold- rolling workability of ***%Si alloy were investigated, where three processes of warm-rolling with the same total reduction of 93% were used, including （1） 500 ℃/12 passes/total reduction of 93%, （2） 500 ℃13 passes/total reduction of 50% ＋ 400 ℃19 passes/total reduction of 86%, and （3） 500 ℃13 passes/total reduction of 50% ＋ 400 ℃15 passes/total reduction of 60% ＋ 300 ℃14 passes/total reduction of 64%. The results show that compared with process （1） warm-rolling with constant temperature of 500 ℃, process （2） and process （3） warm-rolling with gradually decreasing temperature can significantly improve the room temperature plasticity and cold-rolling workability of the Fe-6.5wt%Si alloy. For example, the three point bending fracture deflections are increased by 54.5% and 81.8% for processes （2） and （3）, respectively, and the maximum reductions of single pass cold-rolling without edge crack are increased from 50% of process （1） to 55% of process （2） and 62% of process （3）, respectively. The plasticity improvement of the Fe- 6.5wt%Si alloy can be attributed to both reductions of surface oxidation degree and order degree of the alloy by warm-rolling with gradually decreasing temperature.

关键词： Fe–6.5wt%Si alloy Warm-rolling Gradually decreasing temperature Ordering Mechanical property

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Multicolor upconversion reversible modulations in YNbO_(4):Er^(3+)/Tm^(3+)/Yb^(3+) photochromic materials

引用

Journal of Rare Earths 2024年第2期42卷 270-277,I0002页

作者： Zhen zhang Peng Li Ziyi Xu zhihao zhang Qiwei zhang Haiqin Sun Xihong Hao Inner Mongolia Key Laboratory of Ferroelectric-related New Energy Materials and Devices Schoolof Materials and MetallurgyInner Mongolia University of Science and TechnologyBaotou014010China College of Physics and Technology Guangxi Normal UniversityGuilin541004China

Photochromic materials with multicolor upconversion reversible modulations are attractive in optical switching ***,the fabricated YNbO_(4):Er^(3+)/Tm^(3+)/Yb^(3+) materials exhibit excellent photochromism and multicolor upconversion properties from green,red to near infrared(NIR) emissions with increasing Yb *** multiband upconversion modulations are achieved by alternating light(365 and 405 nm) or thermal *** 365 nm irradiation,the luminescence color changes from yellow to red,the luminescent photoswitching contrast reaches up to 86.21%(green),82.12%(red) and 77.38%(NIR) in the Y_(0.83)Er_(0.01)Tm_(0.01)NbO_(4):0.15 Yb ***,the upconversion emission intensity before and after photochromic reaction shows remarkable change in a wide temperature range of 298-718 *** results indicate that the Er^(3+)/Tm^(3+)/Yb^(3+) tri-doped YNbO_(4) materials can be a good candidate in optical switching and data storage applications.

关键词： Photochromic materials Luminescence modulation Multicolor emission Photoswitching contrast Rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Experimental and numerical studies of Ca(OH)_(2)/CaO dehydration process in a fixed-bed reactor for thermochemical energy storage

引用

Chinese Journal of Chemical Engineering 2023年第10期62卷 11-20页

作者： zhihao zhang Danyang Song Hengxing Bao Xiang Ling Xiaogang Jin School of Mechanical and Power Engineering Nanjing Tech UniversityNanjing 211816China

The Ca(OH)_(2)/CaO thermochemical energy storage(TCES)system based on calcium looping has received extensive attention owing to its high energy storage density,prolonged energy storage time,and environmental *** heat storage process of the Ca(OH)_(2)/CaO TCES system in a mixed heating reactor was evaluated in this study,by employing a combination of direct and indirect heating *** dehydration process was studied experimentally,and a numerical model was established and verified based on the experimental *** dehydration behavior of 500 g of Ca(OH)_(2) powder was investigated in a fixed-bed reactor with mixed *** experimental and simulation results indicated that mixed heating causes combined centripetal and horizontal *** input is the main limiting factor in the heat storage process,because the radial advance of the reaction is hindered by the low thermal conductivity of the solid reactant *** transmission partitions were added to enhance the performance of the *** performance of the modified reactor was compared with that of a conventional *** radial heat transmission partitions in the modified reactor effectively enhance the energy storage rate and reduce the reaction time by 59.5%compared with the reactor without partitions.

关键词： Thermochemical energy storage Reactor Ca(OH)_(2)/CaO Dehydration Experiment research Numerical simulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Simultaneous enhancement in mechanical and corrosion properties of Al-Mg-Si alloys using machine learning

引用

Journal of Materials Science & Technology 2023年第36期167卷 1-13页

作者： Xinming Feng Zhilei Wang Lei Jiang Fan Zhao zhihao zhang Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Key Laboratory for Advanced Materials Processing(MOE) University of Science and Technology BeijingBeijing 100083China Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China

Al-Mg-Si alloys with high strength and good corrosion resistance are regarded as desirable materials for all-aluminum ***,the traditional trial-and-error experimental methods are insufficient to address the trade-offbetween strength and corrosion *** this work,a non-dominated sorting genetic machine-learning algorithm(NSGA-II)was employed to optimize the chemical composition,so as to simultaneously improve the strength and corrosion *** high-performance Al-Mg-Si alloys with low Mg,Si,and Cu contents were successfully developed,where the yield strength(YS),ultimate tensile strength(UTS),and the elongation(δ)reached 375-380 MPa,410-416 MPa,and 13.7%-15.2%,*** with higher-Cu-content 6013 alloy,the YS and UTS of the present alloys increase by about 60 MPa,and the intergranular corrosion resistance is also significantly ***-ture characterization demonstrated thatβ’’and QP phases introduced a significant synergistic precipita-tion strengthening effect;the dispersoids formed by trace Mn,Cr,Fe,Zr,and Ti contributed dispersion strengthening effect;and the good pitting corrosion resistance is attributed to lower Mg and Si contents.

关键词： Aluminum alloy Machine learning High strength Corrosion resistance

来源：

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

Comprehensive evaluation method for sediment allocation effects in the Yellow River

引用

International Journal of Sediment Research 2020年第6期35卷 651-658页

作者： Xujian Chen Chunhong Hu Yuqi An zhihao zhang State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin (SKL-WAC) China Institute of Water Resources and Hydropower Research (IWHR) Institute of Disaster Prevention

Scientific evaluation of the sediment allocation effects in the Yellow River plays an important role in the comprehensive harnessing of the Yellow River.A new evaluation index system for sediment allocation has been established using the Analytic Hierarchy Process,and six main evaluation indexes have been selected for this *** calculation methods and evaluation criteria of each evaluation index are *** evaluation criterion of bankfull discharge in the upper reach is 2,000 m;/s,that of Tongguan elevation in the middle reach is 325.7 m,and that of bankfull discharge in the lower reach is 4,000 m;/*** evaluation criteria of water volume and sediment volume into the Yellow River are 25 billion m;/a and 300 million t/a,respectively,and that of sediment volume into the sea to maintain stability of the estuary is 130-260 million t/*** comprehensive evaluation method and grade index are proposed,and the effect of sediment allocation in the Yellow River from 1960 to 2015 is *** comprehensive evaluation grades in different periods are *** evaluation results objectively reflect the situation of sediment allocation in the Yellow River,and the new comprehensive evaluation method can be applied to evaluate the sediment allocation scheme of the Yellow River in the future.

关键词： Yellow River Sediment allocation Evaluation index Evaluation method Evaluation grade

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：