Results 71 to 80 of about 1,499,140 (192)

可用能與可用能經濟分析於甲苯加氫脫烷製程設計之應用

open access: yes, 2009
可用能分析(Exergy or available energy analysis)係結合熱力學第一與第二定律之製程設計與分析方法,其與成本分析結合則發展出可用能經濟分析(Exergoeconomic or thermoeconomic analysis)方法。本文將可用能與可用能經濟分析方法應用於甲苯加氫脫烷製程設計之兩個層次,前段概念設計與基本設計完成後之改進設計階段。對前者,可用能方法,尤其是可用能損失可作為決定次系統間主要設計參數之目標函數;對後者,可用能經濟分析則可指出進一步改進基本設計之處 ...
張煖; 吳啟明; 韓光榮
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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

过程工程

open access: yes, 2001
化学工程经过归纳、综合和与其它知识的交叉,形成了以传递和反应为主且还在不断发展的三传一反+X的学识基础. 这一学识基础的应用对象已远远超出了化工起家时的化学产品,覆盖了所有物质的物理和化学加工的工艺, 将化学工程提升至过程工程.
郭慕孙
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Atomically Thin Sn:GaN‐GaN Homojunction for High‐Sensitivity β‐Ray Detection

open access: yesRare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT Gallium nitride (GaN), a third‐generation wide‐bandgap semiconductor renowned for its superior radiation tolerance, holds promise for advanced β‐ray detection. Herein, a scalable liquid metal‐assisted in situ synthesis method is presented to fabricate Sn‐doped GaN homojunctions via gallium oxide printing followed by ammonolysis, enabling ...
Weiqing Liu   +8 more
wiley   +1 more source

流程模拟软件SysCAD及其在过程工业中的应用

open access: yes, 2009
流程模拟技术及其商业化软件已被广泛应用于石油化工和矿物加工等过程工业的众多领域,成为工艺流程设计和优化的重要工具。本文介绍1种面向矿物加工和冶金领域的工厂级大型模拟软件—SysCAD,该软件与Aspen、PRO/Ⅱ等传统的化工流程模拟软件不同,提供了丰富的处理固体物料和固液混合物的单元模块,更适合于矿物加工及冶炼过程的流程模拟。通过初步建立镍闪速熔炼过程的SysCAD流程模型,概述了该软件的使用方法和步骤,探讨了如何使用SysCAD的通用模块和Sub-models实现实际过程中复杂单元设备或过程的模拟 ...
谭靓慧, 杨宁, 葛蔚
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Oxygen Doping and Crystal–Amorphous Multiphase Coupling Synergistically Improve the Wear Resistance of NiTiCu Alloy

open access: yesRare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT NiTi shape memory alloys (SMAs) show excellent performance in vibration damping and corrosion resistance. However, due to low hardness and lack of self‐lubrication, they suffer severe friction and wear during service. Although various strategies including doping and heterostructure design have been proposed, the effects are unsatisfactory.
Huwen Ma   +13 more
wiley   +1 more source

臺灣地區鋪面工程之研究與展望

open access: yes, 2013
本文將介紹美國長程鋪面績效研究(LTPP)及Superpave成效規範與國內相關瀝青材料研究之概況。文中亦將介紹最近美國運輸研究委員會(TRB)運輸設施之設計與建造組(Group 3)各相關委員會之研究需求,最後再提出個人對國內各相關研究之心得與未來展望。希望借此拋磚引玉,建議未來亦可建立制度化的方式,以集思廣益、彙整國內外鋪面工程相關的熱門研究課題,以供我國政府單位、學術界及實業界未來編列研發預算之參考。由於建議未來可以研究的工作事項頗多,在此僅簡列以下三項:鋪面損壞調查手冊之研擬 ...
李英豪; 張德文
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基于方法的月表湮灭辐射注量率与岩性相关性研究

open access: yesHe jishu
为解决月表岩性与湮灭辐射注量率之间的非完全映射问题,提出了一种自适应混合聚类方法-模糊C均值高斯混合聚类(Fuzzy C-means Gaussian Mixture Model,FCGMM)。通过硬标签对非平衡数据量训练集的自适应初始化处理,构建了月表湮灭辐射注量率反演典型岩性的数理模型,并采用分层K折交叉验证方法计算了6种岩性的误聚类率,其中亚铁斜长岩、低钛玄武岩、亚铁苏长岩和高钛玄武岩的平均误聚类率分别为1.34%、7.63%、9.67%、6.68%,镁质斜长岩、克里普岩的误聚类率稍高,分别为10.
邱 海燕   +7 more
doaj   +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

钛白反应炉内热态工况的数值模拟

open access: yes, 1987
一、前言 钛白(TiO_2)在国防和民用工业中有着重要的用途。其生产过程为利用四氯化钛(TiCl_4)和氧气(O_2)在高温下进行反应而生成TiO_2。为了深入地了解反应炉内的流动和化学反应过程,我们首次将数值模拟应用于钛白反应炉内的流场预示,对炉内的稳定工况进行了数值计算,给出了一定的结果 ...
王应时, 许厚文, 秦朝斌, 张森
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