检索结果-南通市图书馆

International Journal of Smart and Nano Materials 2022年第1期13卷 1-16,I0001页

作者： shuai yang yang He Jinsong Leng Center for Composite Materials and Structures Harbin Institute of TechnologyHarbin150080P.R.China

Shape memory polymers,with intrinsic enhanced strength and high thermal stability,are highly demanded in aerospace,engineering manufacturing,and spatial *** this paper,we develop a series of thermoplastic shape memory poly(ether ether ketone)s(PEEKs)for the first time,achieving an excellent shape memory ability,high strength,and great thermal stability via a condensation polymer*** tuning the proportion of different bisphenol monomers,the flexibility of molecular main chains is adjusted,resulting in the regulation of transition temperature and mechanical perfor*** PEEKs possess the tunable T_(g) from 143.3°C to 178.6°C,the enhanced tensile strength from 48.4 to 65.1 MPa,and Young’s modulus from 0.45 to 1.8 GPa,in addition to the excellent heat-triggered shape memory effect,as indicated by high recovery ratio(94%–98.9%)and fixity ratio(over 99.5%).Furthermore,after incorporating the magnetocaloric Fe_(3)O_(4) particles,the composites exhibit remotely noncontact magnetic-triggered shape memory behaviors(Fe_(3)O_(4) content over 10 wt%).These synthesized T_(g) tunable shape memory PEEKs and the composites have wide utilization potential in fields of engineering and aerospace structures,owing to the excellent mechanical properties,thermal stability,unique programmable deformation ability,and remote actuation.

关键词： Shape memory PEEK tunable transition temperature high modulus magnetic actuation

Nanoparticles assembly-induced special wettability for bio-inspired materials

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

Particuology 2013年第4期11卷 361-370页

作者： shuai yang Xu Jin Kesong Liu Leijiang Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of the Ministry of Education School of Chemistry and EnvironmentBeihang University Research Institute of Petroleum Exploration and Development Beijing National Laboratory for Molecular Sciences(BNLMS) Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences

Through billions of years of evolution, nature has optimized the programmed assembly of the nano- and micro-scale structures of biological materials. Nanoparticle assembly provides an avenue for mimick- ing these multiscale functional structures. Bio-inspired surfaces with special wettability have attracted much attention for both fundamental research and practical applications. In this review, we focus on recent progress in nanoparticle assembly-induced special wettability, including superhydrophilic surfaces, superhydrophobic surfaces, superamphiphobic surfaces, stimuli-responsive surfaces, and self- healing surfaces. A brief summary and an outlook of the future of this research field are also provided.

关键词： Nanoparticle assemblyBio-inspired materialsWettabilitySurface

Investigation of the Mei-yu Front Using a New Deformation Frontogenesis Function

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2015年第5期32卷 635-647页

作者： yang shuai GAO Shouting Chungu LU Laboratory of Cloud-Precipitation Physics and Severe Storms Institute of Atmospheric PhysicsChinese Academy of Sciences State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences U.S. National Science Foundation

A new frontogenesis function is developed and analyzed on the basis of a local change rate of the absolute horizontal gradient of the resultant deformation. Different from the traditional frontogenesis function, the newly defined deformation frontogenesis is derived from the viewpoint of dynamics rather than thermodynamics. Thus, it is more intuitive for the study of frontogenesis because the compaction of isolines of both temperature and moisture can be directly induced by the change of a flow field. This new frontogenesis function is particularly useful for studying the mei-yu front in China because mei-yu rainbands typically consist of a much stronger moisture gradient than temperature gradient, and involve large deformation flow. An analysis of real mei-yu frontal rainfall events indicates that the deformation frontogenesis function works remarkably well, producing a clearer mei-yu front than the traditional frontogenesis function based on a measure of the potential temperature gradient. More importantly, the deformation frontogenesis shows close correlation with the subsequent（6 h later） precipitation pattern and covers the rainband well, bearing significance for the prognosis or even prediction of future precipitation.

关键词： deformation frontogenesis precipitation

Loss of the emei tumor suppressor promotes tumorigenesis via the JNK and Hippo pathway

在线全文

学校读者我要写书评

暂无评论

Genes & Diseases 2023年第2期10卷 329-331页

作者： shuai yang Yifan Guo Xianjue Ma Key Laboratory of Growth Regulation and Translational Research of Zhejiang Province School of Life SciencesWestlake UniversityHangzhouZhejiang 310024China Westlake Laboratory of Life Sciences and Biomedicine HangzhouZhejiang 310024China Institute of Biology Westlake Institute for Advanced StudyHangzhouZhejiang 310024China

Mutations in the Ras oncogene are the most frequently cancer alterations, occurring in more than 30% of all human cancers. The failures in the development of successful clinical inhibitors against Ras have made Ras as a “undruggable” target. The major reason is lack of a systematic understanding of oncogenic cooperation between Ras activation and mutation of related tumor suppressor genes.1 The genetic techniques available in the Drosophila melanogaster allow analysis of the behavior of cells with distinct mutations, making this the ideal model organism to dissect oncogenic cooperation induced tumorigenesis.2 The exact same mutation, e.g., RasV12, was mimicked in the Drosophila, which enables us to perform large scale genetic screens, aiming to unearth novel tumor suppressors that can synergistically enhance RasV12-related tumor growth.

关键词： suppressor tumorigenesis alterations

A Generalized Frontogenesis Function and Its Application

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

Advances in Atmospheric Sciences 2014年第5期31卷 1065-1078页

作者： yang shuai GAO Shouting LU Chungu Laboratory of Cloud-Precipitation Physics and Severe Storms Institute of Atmospheric PhysicsChinese Academy of Sciences State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences U.S. National Science Foundation Arlington VA 22230 USA

With the definition of generalized potential temperature, a new generalized frontogenesis function, which is expressed as the Lagrangian change rate of the magnitude of the horizontal generalized potential temperature gradient, is derived. Such a frontogenesis function is more appropriate for a real moist atmosphere because it can reflect frontogenesis processes, in which the atmosphere in a frontal zone is typically characterized by neither completely dry nor uniform saturation. Furthermore, by derivation, the expression of generalized frontogenesis function includes both temperature and humidity gradients, which is different from and superior to the traditional frontogenesis function in moist processes, which also uses equivalent potential temperature. Diagnostic studies of real cases are performed and show that the generalized frontogenesis function in non- uniformly saturated moist atmosphere indeed provides a useful tool for frontogenesis, compared to using the traditional frontogenesis function. The new frontogenesis function can be used in situations involving either a strong temperature or moisture gradient and is closely correlated with precipitation.

关键词： frontogenesis diagnostic analysis case study

Empirical model of concrete block fragment behavior under explosion loads

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第8期67卷 2515-2529页

作者： yang shuai NING JianGuo REN HuiLan XU XiangZhao State Key Laboratory of Explosion Science and Safety Protection Beijing Institute of TechnologyBeijing 100081China

Concrete structures undergo integral fragmentation under explosion loads. The fragmentation degree and particle-size distribution of concrete blocks under explosion loads must be considered during mining to ensure safety. In this study, the impulse is calculated based on the relationship between overpressure and time, and the impact energy of the explosion wave is obtained based on blast theory. Subsequently, the Mohr-Coulomb shear strength fracture criterion is introduced to determine the ultimate shear stress of the concrete materials, and an empirical model that can effectively calculate the energy consumption of concrete blocks under explosion loads is established. Furthermore, concrete fragments with different particle sizes under explosion scenarios are quantitatively predicted with the principle of energy conservation. Finally, explosion tests with different top standoff distances are conducted, and the concrete fragments after the explosion tests are recovered, sieved, weighed, and counted to obtain experimental data. The effectiveness of the fragment empirical model is verified by comparing the model calculation results with the experimental data. The proposed model can be used as a reference for civil blasting, protective engineering design, and explosion-damage assessment.

关键词： concrete structures explosion loads fragment behavior empirical model

The amino acids differences in epitopes may promote the different allergenicity of ovomucoid derived from hen eggs and quail eggs

在线全文

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2023年第3期12卷 861-870页

作者： Mengzhen Hao shuai yang Shiwen Han Huilian Che Key Laboratory of Precision Nutrition and Food Quality Key Laboratory of Functional DairyMinistry of EducationCollege of Food Science and Nutritional EngineeringChina Agricultural UniversityBeijing 100083China

Quail egg ovomucoid can inhibit activation of basophils and eosinophils,while hen egg ovomucoid has been shown to be a major allergen,named Gal d *** present,the differences in structure and function between two ovomucoid are *** found the homology of ovomucoid in quail eggs and hen eggs reached77%.Compared with hen egg ovomucoid,the distribution of secondary structure was different in AA52-53,AA57-58,AA66-68,AA71-72,AA131-133,AA139-140,AA157-159 and *** 9 epitopes of egg ovomucoid,there were different amino acids from quail egg ovomucoid in 8 *** quail egg ovomucoid had trypsin inhibition activity and quail egg ovomucoid didn't specifically bind to serum of eggs allergic *** egg ovomucoid can significantly inhibit RBL-2 H3 cells degranulation and protect cells morphology to a certain extent,indicating quail egg ovomucoid can inhibit cells activation and have potential anti-allergic effects,which is related to trypsin inhibitory *** difference in sensitization compare to hen egg ovomucoid may be due to amino acids differences affecting protein structure by changing antigenic epitopes.

关键词： Quail egg Hen egg Ovomucoid Epitope Degranulation

Effects of laser energy on the surface quality and properties of electrodeposited zinc-nickel-molybdenum coatings

在线全文

学校读者我要写书评

暂无评论

Nanotechnology and Precision Engineering 2023年第3期6卷 18-26页

作者： Tao Ni Zhaoyang Zhang Yucheng Wu shuai yang Laser Technology Institute School of Mechanical EngineeringJiangsu UniversityZhenjiang 212013China

As a substitute for toxic cadmium coatings in the aerospace industry,zinc-nickel coatings have excellent application prospects,and their properties can be improved by adding *** this study,laser-assisted electrodeposition is used to improve the surface quality and properties of Zn–Ni–Mo coatings,with investigation of how laser energy in the range of 0–21.1μJ affects their element content,surface morphology,crystal phase,microhardness,residual internal stress,and corrosion *** laser irradiation accelerates the electrodeposition,refines the grain size,improves the hydrogen adsorption,and reduces the residual tensile stress,and a laser energy of 15.4μJ gives the highest Ni and Mo contents and the lowest Zn content,as well as the optimum surface morphology,microhardness,residual internal stress,and corrosion resistance of the coating.

关键词： Electrodeposition Laser energy Zn-Ni-Mo Surface quality Properties

Flexible and reconfigurable radio frequency electronics realized by high-throughput screen printing of vanadium dioxide switches

在线全文

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2020年第1期6卷 369-380页

作者： Weiwei Li Mohammad Vaseem shuai yang Atif Shamim IMPACT Lab ComputerElectrical and Mathematical Sciences and Engineering(CEMSE)DivisiornKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Kingdom of Saudi Arabia

Smart materials that can change their properties based on an applied stimulus are in high demand due to their suitability for reconfigurable electronics,such as tunable filters or *** particular,materials that undergo a metal–insulator transition(MIT),for example,vanadium dioxide(VO 2)(M),are highly attractive due to their tunable electrical and optical properties at a low transition temperature of 68°*** deposition of this material on a limited scale has been demonstrated through vacuum-based fabrication methods,its scalable application for large-area and high-volume processes is still *** printing can be a viable option because of its high-throughput fabrication process on flexible *** this work,we synthesize high-purity VO 2(M)microparticles and develop a screen-printable VO 2 ink,enabling the large-area and high-resolution printing of VO 2 switches on various *** electrical properties of screen-printed VO 2 switches at the microscale are thoroughly investigated under both thermal and electrical stimuli,and the switches exhibit a low ON resistance of 1.8 ohms and an ON/OFF ratio of more than *** electrical performance of the printed switches does not degrade even after multiple bending cycles and for bending radii as small as *** a proof of concept,a fully printed and mechanically flexible band-pass filter is demonstrated that utilizes these printed switches as reconfigurable *** on the ON and OFF conditions of the VO 2 switches,the filter can reconfigure its operating frequency from 3.95 to 3.77 GHz without any degradation in performance during bending.

关键词： dioxide vanadium bending

Configuration and Kinematics of a 3-DOF Generalized Spherical Parallel Mechanism for Ankle Rehabilitation

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

Chinese Journal of Mechanical Engineering 2024年第1期37卷 176-188页

作者： Jianjun Zhang shuai yang Chenglei Liu Xiaohui Wang Shijie Guo School of Mechanical Engineering Hebei University of TechnologyTianjin 300401China Key Laboratory of Robot Perception and Human-Machine Fusion Tianjin 300401China

The kinematic equivalent model of an existing ankle-rehabilitation robot is inconsistent with the anatomical structure of the human ankle,which influences the rehabilitation ***,this study equates the human ankle to the UR model and proposes a novel three degrees of freedom(3-DOF)generalized spherical parallel mechanism for ankle *** parallel mechanism has two spherical centers corresponding to the rotation centers of tibiotalar and subtalar *** screw theory,the mobility of the parallel mechanism,which meets the requirements of the human ankle,is *** inverse kinematics are presented,and singularities are identified based on the Jacobian *** workspaces of the parallel mechanism are obtained through the search method and compared with the motion range of the human ankle,which shows that the parallel mechanism can meet the motion demand of ankle ***,based on the motion-force transmissibility,the performance atlases are plotted in the parameter optimal design space,and the optimum parameter is obtained according to the demands of practical *** results show that the parallel mechanism can meet the motion requirements of ankle rehabilitation and has excellent kinematic performance in its rehabilitation range,which provides a theoretical basis for the prototype design and experimental verification.

关键词： Ankle rehabilitation Parallel mechanism Kinematic analysis Parameter optimization