检索结果-内蒙古大学图书馆

Counterintuitive Ballistic and Directional Liquid Transport on a Flexible Droplet Rectifier

Research 2020年第1期2020卷 1009-1019页

作者： Lei Wang Jing Li Bo Zhang Shile Feng Mei Zhang Dong Wu Yang Lu Ji Jung Kai Jing Liu Zuankai Wang Lei Jiang Beijing Key Lab of Cryo-Biomedical Engineering and Key Lab of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Department of Mechanical Engineering City University of Hong KongHong Kong 999077China Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing 100191China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Precision Machinery and Precision InstrumentationUniversity of Science and Technology of ChinaHefeiAnhui 230027China

Achieving the directional and long-range droplet transport on solid surfaces is widely preferred for many practical applications but has proven to be ***,directionality and transport distance of droplets on hydrophobic surfaces are mutually ***,we report that drain fly,a ubiquitous insect maintaining nonwetting property even in very high humidity,develops a unique ballistic droplet transport mechanism to meet these demanding *** drain fly serves as a flexible rectifier to allow for a directional and long-range propagation as well as self-removal of a droplet,thus suppressing unwanted liquid *** investigation reveals that this phenomenon is owing to the synergistic conjunction of multiscale roughness,structural periodicity,and flexibility,which rectifies the random and localized droplet nucleation(nanoscale and microscale)into a directed and global migration(millimeter-scale).The mechanism we have identified opens up a new approach toward the design of artificial rectifiers for broad applications.

关键词： directional mechanism roughness

来源：评论

学校读者我要写书评

暂无评论

Sound insulation performance of pyramidal hollow lattice structures

引用

Zhendong yu Chongji/Journal of Vibration and Shock 2017年第23期36卷 209-215and231页

作者： Chen, Tingting Liu, Jie Tan, Dongguo Wen, Guilin State Key Lab of Advanced Design and Manufacture for Vehicle Body Hunan University Changsha410082 China College of Mechanical and Vehicle Engineering Hunan University Changsha410082 China

Periodic lattice structures applied in spacecrafts as a new type structure require considering both structural lightweight and excellent sound insulation performance. In order to optimize the traditional pyramidal lattice structure lightweight design and improve its sound insulation effect, the space composition and sound insulation characteristics of pyramidal lattice structures with solid trusses and hollow trusses with the same geometrical parameters were studied here, it was found that the lightweight performance and sound insulation properties of pyramidal lattice structures with hollow trusses in most parts of frequency domain are better than those of pyramidal lattice structures with solid trusses. Based on the direct acoustic-vibration coupling theory, the sound insulation characteristics of pyramidal lattice structures with hollow trusses were studied systematically with numerical methods. The influences of several key structural parameters of hollow truss, such as, elevation angle, wall thickness, length, and cross section shape as well as crystal lattice constant and in-plane size of lattice structure on sound insulation characteristics of the system were analyzed. The results provided a reference for the acoustic optimization of lattice structures. © 2017, Editorial Office of Journal of Vibration and Shock. All right reserved.

关键词： Sound insulation

来源：评论

学校读者我要写书评

暂无评论

Influence of liquidphase sintering on microstructure and thermoelectric properties of Ca_(3)Co_(4)O_(9)based ceramics with Bi_(2)O_(3) additive

引用

Journal of Materiomics 2019年第4期5卷 711-720页

作者： Zongmo Shi Feng Gao Jihong Zhu Jie Xu Yi Zhang Tong Gao Mengjie Qin State Key Laboratory of Solidification Processing MIIT Key Laboratory of Radiation Detection Materials and DevicesSchool of Material Science and EngineeringNorthwestern Polytechnical UniversityXi'an710072China State IJR Center of Aerospace Design and Additive Manufacturing MIIT Lab of Metal Additive Manufacturing and Innovative DesignNorthwestern Polytechnical UniversityXi'an710072China NPU-QMUL Joint Research Institute of Advanced Materials and Structure Northwestern Polytechnical UniversityXi'an710072China

Secondary phase Bi_(2)O_(3),which could promote the sintering densification of ceramics,was used to prepare(Ca_(0.85)Ag_(0.1)La_(0.05))_(3)Co_(4)O_(9) thermoelectric *** mechanism of liquidphase sintering process revealed that the diffusion rate of particles originated from the dissolvedeprecipitated processing for samples and suppressed the coarsening of grain *** effects of Bi_(2)O_(3) on the microstructure and thermoelectric properties were *** results showed that the relative density of samples increased from 92.1% to 95.5% through the liquidphase sintering *** band gaps were tuned and it had the profound impact on the transport of charge *** resistivity decreased while Seebeck coefficient increased from 110 mV/K to 190 mV/K with increasing Bi_(2)O_(3).Furthermore,the peak ZT value of 0.25 for 6 wt% Bi_(2)O_(3) sample at 1073 K was obtained,resulting from low thermal conductivity of 0.92 W/(m·K).It suggests that Bi_(2)O_(3) additive can dramatically improve the thermoelectric properties of Ca_(3)Co_(4)O_(9).

关键词： Ca_(3)Co_(4)O_(9) Thermoelectric ceramics Thermal conductivity Phonon scattering

来源：评论

学校读者我要写书评

暂无评论

High-performance non-Fermi-liquid metallic thermoelectric materials

引用

npj Computational Materials 2023年第1期9卷 1943-1949页

作者： Zirui Dong Yubo Zhang Jun Luo Ying Jiang Zhiyang Yu Nan Zhao Liusuo Wu Yurong Ruan Fang Zhang Kai Guo Jiye Zhang Wenqing Zhang School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Department of Materials Science and Engineering Department of Physicsand Shenzhen Institute for Quantum Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Shenzhen Municipal Key-Lab for Advanced Quantum Materials and Devices and Guangdong Provincial Key Lab for Computational Science and Materials DesignSouthern University of Science and TechnologyShenzhen 518055China Materials Genome Institute Shanghai UniversityShanghai 200444China State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350002China School of Physics and Materials Science Guangzhou UniversityGuangzhou 510006China

Searching for high-performance thermoelectric(TE)materials in the paradigm of narrow-bandgap semiconductors is hampered by a *** we report on the discovery of metallic compounds,TiFe_(x)Cu_(2x−1)Sb and TiFe1.33Sb,showing the thermopower exceeding many TE semiconductors and the dimensionless figure of merits zTs comparable with the state-of-the-art TE materials.A quasi-linear temperature(T)dependent electrical resistivity in 2–700 K and the logarithmic T-dependent electronic specific heat at low temperature coexist with the high thermopower,highlighting the strong intercoupling of the non-Fermi-liquid(NFL)quantum critical behavior of electrons with TE *** structure analysis reveals a competition between the antiferromagnetic(AFM)ordering and Kondo-like spin compensation as well as a parallel two-channel Kondo *** T-dependent magnetic susceptibility agrees with the quantum critical scenario of strong local *** work demonstrates the correlation among high TE performance,NFL quantum criticality,and magnetic fluctuation,which opens up directions for future research.

关键词： materials metallic Fermi

来源：评论

学校读者我要写书评

暂无评论

Impressed current cathodic protection for seawater cooling concrete structures in zawr port Saudi Arabia

Impressed current cathodic protection for seawater cooling c...

引用

International Conference on Machine Tool Technology and Mechatronics engineering, ICMTTME 2014

作者： Huang, Jun Fang, Da-Jing Wang, Ya-Ping Wuhan Harbour Engineering Design and Research Institute of CCCG Wuhan China Key Lab of Large-Span Bridge Construction Technology Ministry of Communications China Hubei Key Laboratory of Advanced Materials and Reinforcement Technology Research for Marine Environment Structures China

ISBN: (纸本)9783038352464

Impressed current cathodic protection is an international generally accepted and effective protection method of concrete is adopted in seawater cooling intake & outfall structures in Zawal port, Kingdom of Saudi Arabia. Total protected concrete area is about 27000m2, including diaphragm walls, edge beams, all walls (main wall and cross wall), floor slab, top slab and wing walls. This project is extensive, changed-constructed and the operating environment is severe. The successful implementation of this project has certain significance in relative projects in the industry. © (2014) Trans Tech Publications, Switzerland.

关键词： Cooling

来源：评论

学校读者我要写书评

暂无评论

A study on thermal spraying sacrificial anode applied in concrete structure cathodic protection

A study on thermal spraying sacrificial anode applied in con...

引用

4th International Symposium on Chemical engineering and Material Properties, ISCEMP 2014

作者： Wang, Ya Ping Wuhan Harbour Engineering Design and Research Institute of CCCG Wuhan China Key Lab of Large-Span Bridge Construction Technology Ministry of Communications China Hubei Key Laboratory of Advanced Materials and Reinforcement Technology Research Marine Environment Structures China

ISBN: (纸本)9783038352303

In this work, the thermal spraying sacrificial anode was investigated as reinforced concrete structure cathodic protection method. During our experiment, the performance of the thermal spraying sacrificial anode was studied using electrochemical method, metallographic microscopy method and simulation tests. And the results show that the thermal spraying sacrificial anodes are better than traditional sacrificial anodes. The method of thermal spraying applied in sacrificial anode field is successful, which solve the problem of insufficient driving initial potential of traditional sacrificial anode in the concrete structure. © (2014) Trans Tech Publications, Switzerland.

关键词： Cathodic protection

来源：评论

学校读者我要写书评

暂无评论

Micro/nano-structured TiO2 surface with dual-functional antibacterial effects for biomedical applications

引用

Bioactive Materials 2019年第1期4卷 346-357页

作者： Xiang Ge Chengzu Ren Yonghui Ding Guang Chen Xiong Lu Kefeng Wang Fuzeng Ren Meng Yang Zhuochen Wang Junlan Li Xinxin An Bao Qian Yang Leng Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education School of Mechanical EngineeringTianjin UniversityTianjin300354China Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina Center for Advanced Regenerative Engineering Northwestern UniversityEvanstonIL60208USA Department of Biomedical Engineering Northwestern UniversityEvanstonIL 60208USA Key Lab of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu610031China National Engineering Research Center for Biomaterials Sichuan UniversityChengdu610064China epartment of Materials Science and Engineering Southern University of Science and TechnologyShenzhenGuangdong518055China State Key Laboratory of Precision Measuring Technology and Instruments Tianjin UniversityTianjin300072China School of Humanities Tianjin Agricultural UniversityTianjin300384China Department of Machine Elements and Engineering Design University of KasselKassel34125Germany

Implant-associated infections are generally difficult to cure owing to the bacterial antibiotic resistance which is attributed to the widespread usage of *** the global threat and increasing influence of antibiotic resistance,there is an urgent demand to explore novel antibacterial strategies other than using ***,using a certain surface topography to provide a more persistent antibacterial solution attracts more and more ***,the clinical application of biomimetic nano-pillar array is not satisfactory,mainly because its antibacterial ability against Gram-positive strain is not good ***,the pillar array should be equipped with other antibacterial agents to fulfill the bacteriostatic and bactericidal requirements of clinical ***,we designed a novel model substrate which was a combination of periodic micro/nano-pillar array and TiO2 for basically understanding the topographical bacteriostatic effects of periodic micro/nano-pillar array and the photocatalytic bactericidal activity of *** innovation may potentially exert the synergistic effects by integrating the persistent topographical antibacterial activity and the non-invasive X-ray induced photocatalytic antibacterial property of TiO2 to combat against antibiotic-resistant implant-associated ***,to separately verify the topographical antibacterial activity of TiO2 periodic micro/nano-pillar array,we systematically investigated its effects on bacterial adhesion,growth,proliferation,and viability in the dark without involving the photocatalysis of *** pillar array with sub-micron motif size can significantly inhibit the adhesion,growth,and proliferation of Staphylococcus aureus(***)and Escherichia coli(***).Such antibacterial ability is mainly attributed to a spatial confinement size-effect and limited contact area availability generated by the special topography of pillar ***,the pillar array is not lethal to S

关键词： Titanium dioxide Micro/nano-structured surface Topographical bacteriostatic activity Photocatalytic bactericidal property Non-invasive treatment

来源：评论

学校读者我要写书评

暂无评论

Input impedance of microstrip-slot-coupled dielectric resonator antennas mounted on thin dielectric layers

引用

International Journal of RF and Microwave Computer-Aided engineering 1996年第3期6卷 174-182页

作者： Junker, Gregory P. Kishk, Ahmed A. Kajfez, Darko Glisson, Allen W. Guo, Jing Department of Electrical Engineering University of Mississippi University MS 38677 United States IEEE University of New Orleans University of Tennessee Knoxville TN United States University of Mississippi University MS United States Control Data Corporation Advanced Design Lab. Arden Hills MN United States Electrical Engineering Department University of Mississippi

An efficient numerical technique based upon a surface integral equation formulation for the coupling of bodies of revolution (BORs) to non-BOR geometries for the design of practical microstrip-slot-aperture-coupled dielectric resonator antennas is presented. The moment method matrix fill time and memory requirements are significantly reduced by utilizing Fourier mode basis functions on the BOR together with the spectral domain Green's function for the printed circuit board. Two practical antennas are designed and fabricated. Antenna input impedances predicted by this technique are in good agreement with those of the actual devices. © 1996 John Wiley & Sons, Inc.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Optimizing the Performance of a Graphite Anode for Innovative Metal-Ion Batteries and Hybrid Capacitors

SSRN

引用

SSRN 2023年

作者： Kim, Moonsu Park, Junhyuck Baek, Jinhyuk Son, Hyeonwook Lee, Gibaek Advanced Energy Materials Design Lab. School of Chemical Engineering Yeungnam University Gyeongsan38541 Korea Republic of

Herein, we present an optimum method for maximizing the electrochemical performance of graphite anodes using two heat treatment methods involving graphite intercalated compound (GIC) group within graphite, namely, thermal shock (TS;directly input target temperature) and gradual heating (GH;including ramping time). Different heating methods for preparing expanded graphite (EG) involve different reactions, relaxation times, and diffusion pathways for the diffusion of metal ions into EG. We found that rapidly shocking the layered structure could facilitate faster Li+ and K+ ion diffusion from EG(TS) (heated for 30 min) via different intercalation/deintercalation processes compared to that from EG(GH). Consequently, EG(TS) exhibited the most significantly improved electrochemical performance among the Li- and K-ion half-cells. For full lithium-ion hybrid capacitors (LIHCs), EG(TS)||activated carbon (AC) showed reasonable values of maximum power density (2.8 kW/kg with 59.12 Wh/kg) and energy density (196.41 Wh/kg), demonstrating its ultrahigh durability (capacity retention: 70.01%) over 12,000 cycles at 2.0 A/g. In addition, for potassium-ion hybrid capacitors (PIHCs), reasonable performance was achieved (average capacity of 82.02 mAh/g at 1.0 A/g over 2000 cycles with 94.35% capacity retention), demonstrating the high efficiency of PIHCs for substituting LIHCs without any systematic alterations. © 2023, The Authors. All rights reserved.

关键词： Metal ions

来源：评论

学校读者我要写书评

暂无评论

The Synergetic Effect of Micro-Blasting and Thermal Oxidation on the Corrosion Performance of Ti6Al4V

SSRN

引用

SSRN 2023年

作者： Jeyalakshmi, P. Ramkumar, P. Advanced Tribology Research Lab Machine Design Section Department of Mechanical Engineering Indian Institute of Technology Madras India

Corrosion is a critical parameter for bio-implants and in this study to minimize corrosion, thermal oxidation was performed on micro-blasted Ti6Al4V surfaces for 24 and 48 hours. The electrochemical performance was studied in 0.9 wt.% NaCl. The combined mechanical and thermal process increases surface roughness and improves hydrophilic nature on Ti6Al4V surface. The formation of metastable Ti2O3 during micro-blasting and further transformation of anatase and rutile TiO2 during thermal oxidation increases the corrosion resistance. Overall, micro-blasting with 48-hour thermal oxidation showed 3 times higher corrosion resistance and reduced corrosion rate by almost 50% as compared with the untreated Ti6Al4V. © 2023, The Authors. All rights reserved.

关键词： Titanium dioxide

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：