Results 1 to 10 of about 1,014,711 (201)

基于Pielou指数的油茶籽平板烘干机 干燥过程中含水率均匀性优化Optimization of moisture content uniformity in the drying process of oil-tea camellia seed plate dryer based on Pielou index

open access: yesZhongguo youzhi, 2023
为改善油茶籽平板烘干机烘干效率低、烘干不均匀等问题,在计算流体力学的理论基础上,建立了多孔介质内部热湿耦合模型,编写UDF程序,利用FLUENT软件模拟并试验验证了该模型的可靠性。引入传统含水率均匀性指数(Mu),与基于Pielou指数的含水率均匀性指数(Jsw)相互对照验证。通过仿真计算研究了烘干机结构、进风角度及运行参数对干燥后油茶籽含水率及其均匀性的影响。结果表明:Mu与Jsw都可作为含湿多孔介质材料含水率均匀性评价指标;中部进风两侧出风结构的烘干机相较于原结构烘干机平均含水率下降 ...
徐顺生1,2, 沈冲1,于东港1,王京1 XU Shunsheng1,2,SHEN Chong1,YU Donggang1,WANG Jing1
doaj   +1 more source

Uniform B-spline of order four with two independent shape parameters(具有两个独立形状参数的四阶均匀B样条)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2007
首先给出四阶五次样条函数空间的基础解系,由此得到四阶五次均匀B样条空间一组线性无关的基函数,在此基础上给出具有两个独立形状参数的四阶均匀B样条函数,定义了具有两个独立形状参数的多项式曲线,此曲线以三次均匀B样条曲线为特殊情况,具有与三次均匀B样条曲线相同的端点性质和连续性,同时扩大了调节曲线形状的范围,使曲线调节更加灵活多样.
ZUOChuan-gui(左传桂)   +1 more
doaj   +1 more source

Study of fly species diversity in Jinhua urban area(金华城区蝇类多样性的研究)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2001
自1998年6月至11月和1999年3月至11月,以笼捕法对金华市区的蝇类多样性进行了分析和研究.结果表明,金华市区共有13种蝇类,蝇类的多样性指数为2.6014,均匀性指数为0.7030.全年蝇类的多样性指数和均匀性指数呈现以5月为次高峰的春季峰和以9~11月为最高峰的秋季峰.在不同的生境和不同的调查点,蝇类的多样性指数和均匀性指数为菜场高于园林,兰溪门高于五里牌.
BAOYi-xin(鲍毅新)
doaj   +1 more source

基于正态分布规律的氧化锌阀片均能配组方法研究

open access: yesDianci bileiqi, 2022
直流系统避雷器组伏安特性的差异会使电流分配不均,伏安特性较差的避雷器加速老化,甚至被击穿,引发严重的安全问题。氧化锌阀片均能配组能够有效减小各避雷器柱的伏安特性差异,缓解电流分配不均匀的问题,提高避雷器组保护性能。提出了基于正态分布规律的氧化锌阀片均能配组方法,将能量吸收差异最大的两柱避雷器中吸能差异最大的电阻片对调,并多次迭代,实现避雷器组各避雷器柱的电流不均匀系数最小。通过对64柱每柱54片氧化锌阀片进行配组研究,结果表明 ...
隗震   +6 more
doaj  

Marine Applications of Metal‐Modified FEVE Coatings on 6061 Aluminum Alloy for Enhanced Anti‐Corrosion and Anti‐Biofouling

open access: yesRare Metals, Volume 45, Issue 7, July 2026.
ABSTRACT This study developed a metal–modified fluoroethylene vinyl ether (FEVE) organic coating on 6061 aluminum alloy, supported by a micro‐arc oxidation (MAO) pretreatment layer, to enhance corrosion resistance and antifouling performance in marine environments.
Chang Liu   +5 more
wiley   +1 more source

Super‐High Coercivity Sintered NdFeB Magnets Enabled by High‐Rate Dy/Tb Grain Boundary Synergistic Diffusion

open access: yesRare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT The surging demand for high‐performance NdFeB magnets has made it essential to achieve ultrahigh coercivity while minimizing the consumption of heavy rare earths. To tackle this challenge, this study proposes a Dy/Tb bilayer grain boundary diffusion strategy and systematically investigates the co‐diffusion behavior of Dy and Tb.
Rui Chang   +7 more
wiley   +1 more source

Insights Into High‐Temperature Mechanical Properties and Oxidation Behavior of Ta‐Optimized TiAl‐Based Alloys Additively Manufactured via Directed Energy Deposition

open access: yesRare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT Directed energy deposition (DED) is an effective method to process complex components with high efficiency, owing to its significant advantage of material saving and features of microarea metallurgy and rapid solidification. This study presents a nano‐Ta‐optimized Ti‐45Al‐8Nb (at%)‐based alloy synthesized via DED. The prepared TiAl‐based alloy
Yi Song   +8 more
wiley   +1 more source

Study on Multi‐Step Deformation Mechanisms and Synergistic Regulation of Strength and Ductility in Ti‐2Al‐2.5Zr Alloy Tubes for Nuclear Power Applications

open access: yesRare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT To overcome the strength–ductility trade‐off in fabricated Ti‐2Al‐2.5Zr alloy tubes, we systematically investigated the microstructural evolution and mechanical behavior throughout thermomechanical processing, including hot working (forging and extrusion) and cold multi‐pass rolling.
Yanlong Xia   +7 more
wiley   +1 more source

Anisotropic MoS2/SiC Aerogels: A Multifunctional Platform for Broadband Electromagnetic Stealth and Thermal Management

open access: yesRare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT To address the demand for high‐temperature stability, broadband strong absorption, and multifunctional integration of electromagnetic wave absorbing materials in complex service environments, lightweight molybdenum disulfide (MoS2) decorated silicon carbide (SiC) nanofiber composite aerogels with a directional layered interconnected structure ...
Zhi Song   +4 more
wiley   +1 more source

Architecting a Robust Yarn‐Like CNT Framework for Structurally Resilient ZnSe Anodes in Potassium–Ion Batteries

open access: yesRare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT The development of structurally stable anodes with high capacities and long cycle lives is essential for the development of potassium–ion batteries. Conversion‐type anodes have attracted considerable attention in potassium–ion batteries (PIBs) due to their high theoretical capacities.
Jeong Ho Na   +7 more
wiley   +1 more source

Home - About - Disclaimer - Privacy