Results 81 to 90 of about 193,229 (203)

Physical Model for Quantitative Organization Design on Mechanical Performance of Nanotwin Unit in Face‐Centered Cubic Metal

open access: yesRare Metals, Volume 45, Issue 11, November 2026.
ABSTRACT Arranging functional units into a specific organization is a practical structural strategy for achieving fabulous performance, known as the functional unit and organization (FUO) paradigm. This paradigm offers a concise shortcut to establishing structure–performance relationships.
Zhongtao Lu   +5 more
wiley   +1 more source

QSPR study and three-dimensional descriptor characterization of membrane-water partition coefficient of compounds(化合物膜水分配系数的QSPR研究和分子三维参数表征)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2005
利用多元线性回归和偏最小二乘分析方法,研究分子表面静电势参数,VolSurf参数与双十四酰基磷脂酰基胆碱(DMPC)-水分配系数之间的定量结构-性质关系(QSPR),均得到较好的结果.分子表面静电势参数分析表明化合物分子表面上负的静电势越分散,越倾向于分配在水相中;与水分子的作用越强,越有利于分配在水相中.此外,具有较大体积和偶极密度的分子倾向于分配在弱极性相中.VolSurf参数分析表明大体积的分子易于分配在DMPC中;分子表面亲水区域较大的分子则倾向于分配在水相中 ...
HUGui-xiang(胡桂香)   +5 more
doaj   +1 more source

简论城市规划设计与建筑设计

open access: yes, 2017
城市规划设计与建筑设计都是与一个城市的形象息息相关的,城市规划设计与建筑设计之间是相互影响的,建筑设计必须服从于城市规划设计,然而城市规划设计也必须立足于建筑设计之上,那么怎样做到两者的协调统一呢?本文就对城市规划设计与建筑设计进行了简单的探讨,供参考借鉴。
慧 李
core   +1 more source

Mixed‐Scale Powder Enables 3D Printing of Tungsten Alloy

open access: yesRare Metals, Volume 45, Issue 11, November 2026.
ABSTRACT Laser powder bed fusion (LPBF) offers a promising route for manufacturing tungsten alloy components with complex geometries, whereas W–Ni–Fe alloys remain the most widely used tungsten alloys because of their excellent overall performance.
Jingjia Sun   +3 more
wiley   +1 more source

拓宽基础,强化实践,程序设计语言类课程教学的探索与实践

open access: yes, 2009
程序设计语言是高等学校计算机专业本科教学计划中不可缺少的基础课程,由于语言种类多、发展快、实践性强,如何在有限的课时内让学生系统地掌握程序设计语言的基本原理、具备初步的编程能力,是该类课程教学面临的一个主要挑战。本文介绍北京交通大学在程序设计语言类课程教学方面进行的研究性教学与实践性教学相结合的探索与尝试。北京交通大学计算机与信息技术学院本科教改项目“计算机专业研究方法论课程建设”(2008.9~2010.3);北京市实验示范中心“计算机科学实践教学体系建设项目”(2008.4~2009.3 ...
吴尽昭, 于双元, 孙昌爱
core  

Bio‐Inspired Damage‐Tolerant Si‐Based Anode for Lithium‐Ion Batteries

open access: yesRare Metals, Volume 45, Issue 11, November 2026.
ABSTRACT Silicon is a promising anode material for lithium‐ion batteries due to its high specific capacity, but it suffers from large volume change and rapid brittle fracture during the lithiation/delithiation cycling process. Although the majority of the literature work has tried to avoid fracture by restraining volume expansion or relieving expansion
Jiali Tong   +11 more
wiley   +1 more source

激光加工机用自适应测量系统设计研究

open access: yes, 1998
针对激光加工的特定工艺要求,在对空间自由曲面测量系统分析的基础上,论述了测量系统研制的实际意义,进行了总体方案设计研究。内容包括:测头选择,系统控制方案设计,测试方案设计 ...
虞和济, 虞钢, 王启义, 张凤林
core   +2 more sources

异构分布式计算机网远程服务系统的设计与实现

open access: yes, 1991
本文阐述了自行设计的一种具有“远程变换服务”目的的简明通用的远程服务语言(RSL)的设计方法,基于 RSL 实现了对异构环境下远程服务系统(HERSS)的逻辑结构的构造.并基于 RSL 自行设计完成了SUN(UNIX)/VAX(VMS)异构分布式计算机网远程服务系统软件.RSL 语言简化了异构分布式计算机网络环境下的远程用户使用网络资源的任务,由此设计的 HERSS ...
彭慧, 尹朝万, 王森
core  

Dual‐Regulation of Continuous and Discontinuous Precipitation via Carbon Alloying for Enhanced Strength‐Ductility Synergy in a Medium‐Entropy Alloy

open access: yesRare Metals, Volume 45, Issue 11, November 2026.
ABSTRACT The exceptional ductility of face‐centered cubic high/medium‐entropy alloys (H/MEAs) is counterbalanced by intrinsically restrained yield strength, fundamentally compromising their application in structural and functional materials. Here, a novel carbon (C)‐driven precipitation strategy is introduced to promote discontinuous precipitation (DP)
Hao Feng   +10 more
wiley   +1 more source

螺旋结构对螺旋三叶燃料元件流动换热影响研究

open access: yesHe jishu
螺旋三叶燃料元件(Helical Tri-lobe Fuel,HTF)是一种新型燃料元件,具有比换热面积大、对流换热能力强、机械性能好等特点,在先进核动力和小型核反应堆中有广阔的应用前景。本文对HTF组件内的单相流动以及换热特性进行数值模拟研究,计算并分析了棒束流域内二次流速度、截面涡量、温度、换热系数等关键参数,获得了螺旋节距、最小间距、叶根弧与叶尖弧半径比等参数对流域流动与换热特性的影响规律。结果表明,HTF元件的螺旋结构可增强冷却剂的横向交混,通过二次流强化对流传热 ...
刁 思予, 赵 亚楠, 于 涛
doaj   +1 more source

Home - About - Disclaimer - Privacy