检索结果-南通市图书馆

China Communications 2021年第8期18卷 121-132页

作者： Yongle Wu Mengdan Kong zheng zhuang Weimin Wang School of Electronic Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China

In this review,the advanced microwave devices based on the integrated passive device(IPD)technology are expounded and discussed in detail,involving the performance breakthroughs and circuit ***,the development trend of IPD-based multifunctional microwave circuits is predicted further by analyzing the current research hot *** paper discusses a distinctive research area for microwave circuits and mobile-terminal radio-frequency integrated chips.

关键词： chips integrated passive device(IPD) multifunctional microwave circuit

Hot deformation behavior of a heat-resistant alloy without γ′-phase

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2020年第7期27卷 820-833页

作者： Chen Dong zheng-dong Liu zheng-zong Chen Zhen Liu Jia-zhuang zheng Xi-tao Wang Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing100083China Institute for Special Steels Central Iron and Steel Research InstituteBeijing100081China

The hot compression behavior of the nickel-based heat-resistant alloy C-HRA-2®was investigated by a Gleeble-1500 thermo-mechanical simulator with the deformation temperature range of 950-1150℃and the strain rate of 0.001-10 s^−*** constitutive equation of the alloy was established by using a hyperbolic sine function,and the peak stress followed a power law relationship with the Zener-Hollomon parameter(Z).The activation energy was about 446 kJ mol^−1 for the whole hot deformation domain in this *** optimum hot deformation condition was obtained in the temperature range of 1050-1150℃and the strain rate range of 0.005-0.1 s^−*** domains during the hot deformation would occur in the strain rate range of 0.1-10 s^−1 with inhomogeneous microstructure and high-density twins in the *** dominant nucleation mechanism of dynamic recrystallization(DRX)was continuous dynamic recrystallization with sub-grain rotation at high strain rate,while DRX at low strain rate was discontinuous dynamic recrystallization with original grain boundaries bulging.

关键词： Nickel-based alloy Dynamic recrystallization Hot compression Processing map

The Art of Power Dividing:A Review for State-of-the-Art Planar Power Dividers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Communications 2017年第5期14卷 1-16页

作者： Yongle Wu Lingxiao Jiao zheng zhuang Yuanan Liu School of Electronic Engineering Beijing Key Laboratory of Work Safety Intelligent MonitoringBeijing University of Posts and TelecommunicationsBeijing 100876China

In this paper,massive state-of-theart planar power dividers are presented and discussed. The innovations of these superiorly-performanced power dividers lie in the performance breakthrough,physical configurations and function integrations. Eventually,based on the trend presented,the future of the power dividers is predicted. This paper might have inspiration significance to illuminate the way for the development of power dividers.

关键词： power divider microwave circuit microwave passive component analog circuit

Effects of process parameters on the growth behavior and granule size distribution of iron ore mixtures in a novel high-shear granulator

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2022年第12期29卷 2152-2161页

作者： Yang You Jiabao Guo Gang Li zhuang zheng Yong Li Xuewei Lü College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Chongqing Key Laboratory of Vanadium–Titanium Metallurgy and New Materials Chongqing UniversityChongqing 400044China

This work proposes a novel horizontal high-shear granulator for iron ore granulation before sintering *** granulation behavior such as growth process and structure of granules were firstly analyzed,followed by the effects of operation conditions such as water content,initial particle size distribution,and the concentrate *** results show that the granule size increased significantly with increasing the granulation time,and the structure of granule can be divided into three types:non-nuclei,single-nuclei,and *** promotes the coalescence and growth of particles,and a better granulation performance was obtained at the water content of 8.8wt%under the current raw material *** the nuclei particle ratio led to an increase in average size of granules and permeability of the granules bed,but a decrease in growth ***,with increasing of concentrate ratio,granulation performance such as granule size,bed permeability,and uniformity became worse.

关键词： horizontal high-shear granulation iron ore granule structure granulation performance size distribution

Simulation of the T-jump triggered unfolding and thermal unfolding vibrational spectroscopy related to polypeptides conformation fluctuation

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2017年第8期60卷 1115-1129页

作者： Xian Chen Tianmin Wu Zhe-Ning Chen Tan Jin Wei zhuang Yisong zheng State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matte~ Chinese Academy of Sciences Fuzhou 350002. China

We review in this article our recent simulation works on modeling peptide T-jump and thermal unfolding Fourier transform infrared spectroscopy(FTIR) and two-dimensional infrared(2DIR) spectra. The theoretical and computational techniques used,including Markov state model(MSM), integrated tempering sampling(ITS) and nonlinear exciton propagation(NEP), are first briefly introduced. The protocols for simulating the thermal unfolding as well as T-jump unfolding are then summarized in details. The simulated spectral features, such as the intensity and ellipticity, are demonstrated to agree well with the experimental observations.

关键词： polypeptides amide vibration nonlinear response MSMs T-jump implicit solvent model ITS 2DIR folding landscape

Investigation on the granulation behavior of iron ore fine in a horizontal high-shear granulator

在线全文

学校读者我要写书评

暂无评论

Particuology 2022年第9期20卷 57-64页

作者： Yang You Jiabao Guo Gang Li zhuang zheng Yong Li Yaowei Yu Xuewei Lv College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing UniversityChongqing 400044China State Key Laboratory of Advanced Special Steel Shanghai Key Laboratory of Advanced FerrometallurgySchool of Materials Science and EngineeringShanghai UniversityShanghai 200444China State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing 400044China

High-shear granulation is widely used in many particulate industries for its good capability to improve the size,strength and composition uniformity of powder *** work conducted an experimental study to investigate the granulation behavior of iron ore fine in a horizontal high-shear granulator,such as granules size distribution,granules growth rate,and permeability of the granules *** results show that the granule size and permeability of packed granules bed increase gradually with increasing the granulation time,and the growth of granules can be divided into three stages:the rapid growth stage,the slow growth stage and the relatively stable *** the higher rotational speed and larger number of impellers increase the kinetic energy and collision frequency of the particles,which causes the increase of average granule size,growth rate and permeability of granules packed *** the other hand,the shear damage effect of the impellers on the granules is also enhanced with the increase of rotational speed and impeller number,resulting in significant granule size segregation.

关键词： High shear granulation Iron ore Particle Size distribution

Texture and Se vacancy optimization induces high thermoelectric performance in Bi_(2)Se_(3) flexible thin films

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第6期43卷 2796-2804页

作者： Dong-Wei Ao Wei-Di Liu Yue-Xing Chen Fan Ma Yi-Jie Gu zhuang-Hao zheng School of Machinery and Automation Weifang UniversityWeifang 261061China Australian Institute for Bioengineering and Nanotechnology The University of QueenslandBrisbane 4072Australia Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060China School of Materials Science and Engineering Inner Mongolia University of TechnologyHohhot 010051China

Bi_(2)Se_(3)-based flexible thin film with high thermoelectric performance is promising for the waste heat recovery *** this work,a novel post-selenization method is employed to prepare n-type Bi_(2)Se_(3)flexible thin films with highly textured *** strengthened texture and Se vacancy optimization can be simultaneously achieved by optimizing the selenization *** highly oriented texture leads to the increased carrier mobility and results in a high electric conductivity of~290.47 S·cm^(-1)at 623 ***,a high Seebeck coefficient(>110μW·K-1)is obtained due to the reduced carrier concentration,induced by optimizing vacancy ***,a high power factor of 3.49μW·cm^(-1)·K^(-2)at 623 K has been achieved in asprepared highly-bendable Bi_(2)Se_(3)flexible thin films selenized at 783 *** study introduces an effective post-selenization method to tune the texture structure and vacancies of Bi_(2)Se_(3)flexible thin films,and correspondingly achieves high thermoelectric performance.

关键词： Thermoelectric Bi_(2)Se_(3) Flexible thin film Post-selenization

High thermoelectric and mechanical performance in the n-type polycrystalline SnSe incorporated with multi-walled carbon nanotubes

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第19期114卷 55-61页

作者： Xin-Yu Mao Xiao-Lei Shi Liang-Chuang Zhai Wei-Di Liu Yue-Xing Chen Han Gao Meng Li De-zhuang Wang Hao Wu zhuang-Hao zheng Yi-Feng Wang Qingfeng Liu Zhi-Gang Chen State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Centre for Future Materials University of Southern QueenslandSpringfield CentralBrisbane4300Australia School of Chemistry and Physics Queensland University of TechnologyBrisbaneQLD 4000Australia Australian Institute for Bioengineering and Nanotechnology The University of QueenslandBrisbaneQLD 4072Australia Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Key Laboratory of Material Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China School of Mechanical and Mining Engineering The University of QueenslandSt LuciaBrisbaneQLD 4072Australia College of Materials Science and Engineering Nanjing Tech UniversityNanjing 211816China Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites Nanjing Tech UniversityNanjing 211816China CAS Key Laboratory of Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China

In this study,we introduce multi-walled carbon nanotubes(MWCNTs)in Pb/I co-doped n-type polycrys-tal SnSe to simultaneously improve its thermoelectric and mechanical properties for the first *** introduced MWCNTs act as the“bridges”to accelerate the electron carrier transport between SnSe grains,leading to significantly increased electrical conductivity from 32.6 to 45.7 S cm^(−1) at 773 K,which con-tributes to an enhanced power factor of∼5.0μW cm^(−1) K^(−2) at this *** MWCNTs possess high intrinsic thermal conductivities,these MWCNTs,acting as nanoinclusions in the SnSe matrix to form the dense interfaces between SnSe and MWCNTs,provide extra heat-carrying phonon scattering centers,leading to a slightly reduced lattice thermal conductivity of only 0.34 W m^(−1) K^(−2) at 773 K and in turn,a high ZT of∼1.0 at this ***,the introduced MWCNTs can simultane-ously act as the“binders”to bond adjacent grains,significantly improving the mechanical properties of SnSe by boosting its Vickers hardness from 39.5 to *** work indicates that our facile approach can achieve high thermoelectric and mechanical properties in n-type SnSe polycrystals with a considerable potential for applying to thermoelectric devices as n-type elements.

关键词： Thermoelectric property SnSe N-type Multi-walled carbon nanotubes Mechanical property

Realizing high thermoelectric performance in n-type Bi_(2)Te_(3)based thin films via post-selenization diffusion

在线全文

学校读者我要写书评

暂无评论

Journal of Materiomics 2023年第4期9卷 618-625页

作者： Yue-Xing Chen Jun-Ze Zhang Mohammad Nisar Adeel Abbas Fu Li Guang-Xing Liang Ping Fan zhuang-Hao zheng Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060China

Thermoelectric thin film has attracted a lot of attention due to its potential in fabricating micropower generator in chip sensors for internet of things(IoT).However,the undeveloped performance of n-type thermoelectric thin film limits its widely *** this work,a facile post-selenization diffusion reaction method is employed to introduce Se into Bi_(2)Te_(3)thin films,in order to optimize the carrier transport *** and theoretical calculation results indicate that the carrier concentration decreases and density of states increases after Se doping,leading to the enhancement of Seebeck ***,adjusting the diffusion reaction temperature can maintain the carrier concentration while increasing the mobility simultaneously,resulting in a high power factor of 1.5 mW/(m·K^(2)),which is eight times higher than that of the pristine Bi_(2)Te_(3)thin ***,a thin film device fabricated by the present Se-doped Bi_(2)Te_(3)thin films shows the highest output power of 60.20 nW under the temperature difference of 37 K,indicating its potential for practical use.

关键词： Thermoelectric Thin film Magnetron sputtering Bie-Tee-Se

Enhanced thermoelectric properties of n-type Bi_(2)O_(2)Se by KCl doping

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 Advanced Ceramics 2023年第9期12卷 1767-1776页

作者： Zi-long Zhang Tao Wang Mohammad Nisar Yue-xing Chen Fu Li Shuo Chen Guang-xing Liang Ping Fan zhuang-hao zheng Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

Bi_(2)O_(2)Se is considered one of the most promising thermoelectric(TE)materials for combining with p-type BiCuSeO in a TE module given its unique chemical and thermal ***,the enhancement of its dimensionless figure of merit,zT value,remains a challenge because of its low electrical ***,we introduce KCl into Bi_(2)O_(2)Se,synthesized by solid-state reaction and spark plasma sintering method,to improve its TE *** synthesized samples show an outstanding enhancement in electrical conductivity,carrier concentration,and power factor after KCl *** Bi_(2)O_(2)Se-based sample with a 0.05%KCl doping content possesses a high zT value of~0.58 at 773 K,which is over 50%enhancement compared with the pristine Bi_(2)O_(2)Se *** also prove that the K element substitutes the Bi site,and Cl replaces the Se site by X-ray diffraction results and density functional theory calculation,supporting that K can improve the electrical conductivity by the position of Fermi level which is above the conduction band *** and theoretical results indicate the success of co-doping with a small amount of KCl and show a huge potential of this novel method for Bi_(2)O_(2)Se TE performance improvement.

关键词： thermoelectric(TE)materials Bi_(2)O_(2)Se KCl co-doping figure of merit(zT)