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