期刊文献+
共找到35篇文章
< 1 2 >
每页显示 20 50 100
旋转变压器二相法轴角编码原理与实现
1
作者 张俊科 《微电机》 北大核心 1990年第2期14-16,共3页
旋转变压器二相法轴角编码是一种计算法或查表法。首先利用旋转变压器的二相信号将轴角分为8个区间,而后再利用在小区间的电压直接编码。文中介绍轴角编码的原理及主要电路。
关键词 旋转变压器 二相法 角度 编码
下载PDF
二相法制备聚乙烯醇缩丁醛最佳条件的探讨 被引量:4
2
作者 卢宝生 《中国胶粘剂》 CAS 1994年第2期25-27,共3页
叙述了以聚乙烯醇、丁醛为原料在盐酸为催化剂条件下,缩合反应最佳工艺条件的选择.介绍了配方及工艺条件的试验结果.
关键词 聚乙烯醇 缩丁醛 二相法 工艺
下载PDF
活性染料二相法印花影响因素的探讨
3
作者 张文芝 蔡方园 朱黎 《染整技术》 CAS 2011年第10期1-3,56,共3页
研究了固色剂用量、糊料类型、过热蒸汽三个因素对活性染料二相法印花的影响。通过在不同固色剂用量下进行固色后测出的K/S值得出,固色剂用量越大,印花的表观色深效果越好。通过对三种不同类型的活性染料分别与海藻酸钠糊和复配糊料混... 研究了固色剂用量、糊料类型、过热蒸汽三个因素对活性染料二相法印花的影响。通过在不同固色剂用量下进行固色后测出的K/S值得出,固色剂用量越大,印花的表观色深效果越好。通过对三种不同类型的活性染料分别与海藻酸钠糊和复配糊料混合后印花出的效果作出比较得出,复配糊料印花表观色深随固色时间增加显著提高。通过在过热蒸汽不同固色时间下固色得出,固色的适宜时间为2min。 展开更多
关键词 活性染料 印花 二相法固色 影响因素
下载PDF
今日的二相法印花高效蒸化技术(一) 被引量:1
4
作者 岑乐衍 《染整科技》 2002年第3期1-5,共5页
关键词 织物 高效蒸化机 二相法印花 高效蒸化技术
下载PDF
今日之二相法印花高效蒸化技术(下)
5
作者 岑乐衍 《纺织导报》 CAS 2002年第4期60-60,62-65,共5页
关键词 二相法印花 高效蒸化技术 碱剂 染料 织物
下载PDF
今日之二相法印花高效蒸化技术(上)
6
作者 岑乐衍 《纺织导报》 CAS 2002年第3期41-44,46,共5页
二相法印花技术开发于60年代,近年又有崛起之势。笔者集60年代系统研究和近年来咨询服务之经验,系统地探讨了还原染料的二相法印花、活性染料的二相法印花、涤/棉混纺织物的二相法印花的理论依据、主要因素、典型工艺及相应的高效蒸化技... 二相法印花技术开发于60年代,近年又有崛起之势。笔者集60年代系统研究和近年来咨询服务之经验,系统地探讨了还原染料的二相法印花、活性染料的二相法印花、涤/棉混纺织物的二相法印花的理论依据、主要因素、典型工艺及相应的高效蒸化技术,并对相关试验作了评价。 展开更多
关键词 还原染料 活性染料 涤棉混纺织物 二相法印花 高效蒸化技术
下载PDF
今日的二相法印花高效蒸化技术(二)
7
作者 岑乐衍 《染整科技》 2002年第4期1-10,共10页
关键词 二相法印花 高效蒸化技术 织物 活性染料
下载PDF
织物二相法印花工艺
8
作者 刘永庆 《丝网印刷》 2010年第3期13-15,共3页
活性染料直接印花是纤维素纤维织物最常用的印花工艺。这是因为活性染料色谱较广泛、色泽鲜艳、湿牢度较好、印花成本低、适用性强、印花色浆的调配较为方便、花型的丝网印花印制方便及工艺过程控制较为容易。印花后织物不仅手感好,而... 活性染料直接印花是纤维素纤维织物最常用的印花工艺。这是因为活性染料色谱较广泛、色泽鲜艳、湿牢度较好、印花成本低、适用性强、印花色浆的调配较为方便、花型的丝网印花印制方便及工艺过程控制较为容易。印花后织物不仅手感好,而且各项色彩牢度能达到较高的水平,特别是湿处理牢度和印花匀染性较好。 展开更多
关键词 纤维素纤维织物 印花工艺 二相法 工艺过程控制 活性染料 湿处理牢度 直接印花 印花色浆
下载PDF
气相色谱法分析2,6-二异丙基苯酚气相胺化产物 被引量:4
9
作者 姜瑞霞 谢在库 +2 位作者 张成芳 陆贤 陈庆龄 《精细石油化工》 CAS CSCD 北大核心 2002年第6期28-30,共3页
采用气相色谱法 ,HP 35色谱柱分离 ,FID检测器检测 ,以甲醇为溶剂 ,以 2 ,6 二甲基苯胺作为内标物对2 ,6 二异丙基苯酚气相胺化制备 2 ,6 二异丙基苯胺的液相产物进行了定量分析。实验结果表明 ,方法回收率为 97.7%~ 10 8.7% ,相对... 采用气相色谱法 ,HP 35色谱柱分离 ,FID检测器检测 ,以甲醇为溶剂 ,以 2 ,6 二甲基苯胺作为内标物对2 ,6 二异丙基苯酚气相胺化制备 2 ,6 二异丙基苯胺的液相产物进行了定量分析。实验结果表明 ,方法回收率为 97.7%~ 10 8.7% ,相对标准偏差为 0 .5 %~ 5 .0 %。 展开更多
关键词 2 6-异丙基苯胺气胺化 色谱 2 6-异丙基苯酚 胺化产物
下载PDF
无约束二次物理气相法CdSe单晶体的生长研究
10
作者 熊祝韵 曾体贤 +3 位作者 张敏 陈太红 黄飞 杨辉 《人工晶体学报》 CSCD 北大核心 2017年第9期1678-1682,共5页
在物理气相法的基础上,通过无约束二次气相输运法生长出具有自然显露面的尺寸约为6 mm×7 mm×2 mm CdSe晶体。对生长晶体的结构、成分和形貌进行表征,测试发现:XRD粉末衍射图谱强度高无杂峰,CdSe晶体的3个自然显露面分别是(100... 在物理气相法的基础上,通过无约束二次气相输运法生长出具有自然显露面的尺寸约为6 mm×7 mm×2 mm CdSe晶体。对生长晶体的结构、成分和形貌进行表征,测试发现:XRD粉末衍射图谱强度高无杂峰,CdSe晶体的3个自然显露面分别是(100)、(002)和(110)面,回摆曲线半峰宽度较小;ICP-MS结果显示样品中杂质含量有效降低;红外透过率测试结果显示无约束二次气相法生长的CdSe晶体红外透过率高;SEM观测发现其解理面呈阶梯状且台阶方向一致。结果表明,采用无约束二次气相法生长的CdSe晶体结晶质量较好,纯度高,红外透过率高,并根据BFDH模型分析CdSe晶体自然显露面出现的原因。 展开更多
关键词 硒化镉(CdSe)晶体 无约束次气 自然显露面
下载PDF
基于瞬时无功功率理论的谐波电流检测法 被引量:17
11
作者 黄玲 刘骥 +1 位作者 曹滨 朱东柏 《哈尔滨理工大学学报》 CAS 2001年第4期103-106,共4页
为解决谐波电流检测的长时延问题,依据三相电路的瞬时无功功率理论,采用三相/二相坐标变换法,提出了一种谐波电流实时检测方法.计算结果表明,该方法可以准确、实时地检测出谐波电流,也可替代传统的电力谐波量检测方法.
关键词 电网 无功功率 谐波检测 /坐标变换 谐波电流 检测原理
下载PDF
Comparative analysis of isothermal and non-isothermal solidification of binary alloys using phase-field model 被引量:2
12
作者 肖荣振 安国升 +2 位作者 朱昶胜 王智平 杨世银 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第11期3639-3644,共6页
Based on the entropy function, a two-dimensional phase field model of binary alloys was established. Meanwhile, an explicit difference method with uniform grid was adopted to solve the phase field and solute field con... Based on the entropy function, a two-dimensional phase field model of binary alloys was established. Meanwhile, an explicit difference method with uniform grid was adopted to solve the phase field and solute field controlled equations. And the alternating direction implicit(ADI) algorithm for solving temperature field controlled equation was also employed to avoid the restriction of time step. Some characteristics of the Ni-Cu alloy were captured in the process of non-isothermal solidification, and the comparative analysis of the isothermal and the non-isothermal solidification was investigated. The simulation results indicate that the non-isothermal model is favorable to simulate the real solidification process of binary alloys, and when the thermal diffusivity decreases, the non-isothermal phase-field model is gradually consistent with the isothermal phase-field model. 展开更多
关键词 phase-field model binary alloys isothermal solidification non-isothermal solidification
下载PDF
Method for integer ambiguity resolution in GPS network RTK 被引量:5
13
作者 潘树国 王庆 +1 位作者 柯福阳 邓健 《Journal of Southeast University(English Edition)》 EI CAS 2009年第4期491-495,共5页
A method for integer ambiguity resolution in the global positioning system (GPS) multi-reference station network real time kinematic (RTK) is proposed. First, the barycenter of the triangle of reference stations f... A method for integer ambiguity resolution in the global positioning system (GPS) multi-reference station network real time kinematic (RTK) is proposed. First, the barycenter of the triangle of reference stations for ambiguity resolution is taken as a reference point. The satellite which has the largest elevation angle with the reference point is selected as a reference satellite. The parameters for constructing the weight matrix of carrier phase observation and the criteria for checking the correctness of integer ambiguity resolution of a network are obtained. Then, the wide ambiguity is calculated by a linear combination method of dualband observation. And the LI ambiguity is obtained by a nonionosphere combination method. The Kalman filter is introduced to refine the floating-point solution of ambiguity and estimate the real-time tropospheric delay. Finally, the cofactor matrix of ambiguity is de-correlated by Z-transformation to reduce the searching space of the integer ambiguity solution and improve the efficiency of the least-squares ambiguity decorrelation adjustment (LAMBDA) algorithm. The experimental results show that this method can reliably obtain the integer ambiguity solution among multi-reference stations with 40 epochs. 展开更多
关键词 network real time kinematic AMBIGUITY troposphere: reference satellite least-squares ambiguity decorrelation adjustment
下载PDF
本期内容浅析
14
作者 本刊编辑部 《染整技术》 CAS 2011年第10期I0001-I0001,共1页
本期的特色是新工艺新技术较多,适合企业生产运用的实用新技术不少,涉及面较广。我们先从《专论与综述》说起。《活性染料二相法印花影响因素的探讨》作者研究固色剂用量、糊料类型、过热蒸汽三个因素对活性染料二相法印花的影响。研... 本期的特色是新工艺新技术较多,适合企业生产运用的实用新技术不少,涉及面较广。我们先从《专论与综述》说起。《活性染料二相法印花影响因素的探讨》作者研究固色剂用量、糊料类型、过热蒸汽三个因素对活性染料二相法印花的影响。研究了二相法印花工艺。 展开更多
关键词 二相法印花 活性染料 印花工艺 企业生产 影响因素 过热蒸汽 新技术 固色剂
下载PDF
网印油墨1000问
15
作者 闫素斋 《印刷技术》 北大核心 2004年第14期44-45,共2页
关键词 网印油墨 二相法印花 轧碱液配方 工艺流程 丝网印刷
下载PDF
PEG-combined liquid phase synthesis and electrochemical properties of carbon-coated Li_3V_2(PO_4)_3 被引量:1
16
作者 王任衡 李新海 +2 位作者 王志兴 郭华军 黄斌 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第4期1241-1247,共7页
The carbon-coated monoclinic Li3V2(PO4)3(LVP) cathode materials were successfully synthesized by liquid phase method using PEG as reducing agent and carbon source. The effects of relative molecular mass of PEG on the ... The carbon-coated monoclinic Li3V2(PO4)3(LVP) cathode materials were successfully synthesized by liquid phase method using PEG as reducing agent and carbon source. The effects of relative molecular mass of PEG on the properties of Li3V2(PO4)3/C were evaluated by X-ray diffraction(XRD), scanning electron microscope(SEM) and electrochemical performance tests. The SEM images show that smaller size particles are obtained by adding larger and smaller PEGs. The electrochemical cycling of Li3V2(PO4)3/C prepared by both PEG200 and PEG20 k has a high initial discharge capacity of 131.1 mA·h/g at 0.1C during 3.0-4.2 V, and delivers a reversible discharge capacity of 123.6 m A·h/g over 30 cycles, which is better than that of other samples. The improvement in electrochemical performance is caused by its improved lithium ion diffusion coefficient for the macroporous morphology, which is verified by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS). 展开更多
关键词 lithium-ion battery lithium vanadium phosphate PEG CARBON-COATING liquid phase method
下载PDF
Investigation on Two Novel Substituted β-Cyclodextrins Used as GC Stationary
17
作者 萧德庆 凌云 +3 位作者 傅若农 顾峻岭 赵郑通 戴荣继 《Journal of Beijing Institute of Technology》 EI CAS 1998年第3期268-273,共6页
Aim To study the chromatographic behaviors of two dipentyl cyclodextrin derivative stationary phases. Methods Two new β-cyclodextrin derivatives, heptakis-[2, 6-di-O-pentyl-3-O-(4-nitrobenzyl)] -β-CD and heptakis-[... Aim To study the chromatographic behaviors of two dipentyl cyclodextrin derivative stationary phases. Methods Two new β-cyclodextrin derivatives, heptakis-[2, 6-di-O-pentyl-3-O-(4-nitrobenzyl)] -β-CD and heptakis-[2, 6-di-O-pentyl-3 -O-(5 -hexenyl)]-β-CD, were synthesized and coatal on fed-silica capillary columns. The chromatographic behaviors of the columns were characterized . Results It was found that the she, polarity, and aromatic property of the substituted group at the 3-position of heptakis-(2, 6 - di - O - pentyl) - β - cyclodextrins greatly influenced their chromatographic properties and separation ability. The introduction of aromatic group or a group containing a double-bond may bring π-π interactions between the host and guest molecules, and therefore increases the separation ability of the β-CDs for substituted benzene isomers. Conclusion The new substituted β-CD compounds are very suitable for being used as gas chromatogaphic stationary phases. 展开更多
关键词 gas chromatography stationary phases dipentyl cyclodextrin derivatives
下载PDF
基于模糊理论的导弹质量评估 被引量:4
18
作者 周璐 冯玉光 顾均元 《兵工自动化》 2020年第8期60-66,共7页
为更好地掌握导弹的质量状态,对基于模糊理论的导弹质量评估进行分析。根据导弹自动化测试系统的测试结果,采用层次分析法对导弹的质量评定体系进行分类,构建导弹质量评估框架。对导弹测试数据的质量等级划分规则进行设计,通过二相Fuzz... 为更好地掌握导弹的质量状态,对基于模糊理论的导弹质量评估进行分析。根据导弹自动化测试系统的测试结果,采用层次分析法对导弹的质量评定体系进行分类,构建导弹质量评估框架。对导弹测试数据的质量等级划分规则进行设计,通过二相Fuzzy统计法,拟合出导弹归一化测试数据属于各个质量状态的隶属函数模型舱,并对导弹各系统以及导弹整体进行了质量综合评定。评估结果验证了该评价体系是合理的。 展开更多
关键词 质量评估 模糊理论 Fuzzy统计 隶属函数 模糊综合评判
下载PDF
Morphological evolution and growth kinetics of Kirkendall voids in binary alloy system during deformation process-Phase field crystal simulation study 被引量:2
19
作者 Wen-jing MA Chang-bo KE +2 位作者 Shui-bao LIANG Min-bo ZHOU Xin-ping ZHANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第3期599-607,共9页
The formation and growth of Kirkendall voids in a binary alloy system during deformation process were investigated byphase field crystal model.The simulation results show that Kirkendall voids nucleate preferentially ... The formation and growth of Kirkendall voids in a binary alloy system during deformation process were investigated byphase field crystal model.The simulation results show that Kirkendall voids nucleate preferentially at the interface,and the averagesize of the voids increases with both the time and strain rate.There is an obvious coalescence of the voids at a large strain rate whenthe deformation is applied along the interface under both constant and cyclic strain rate conditions.For the cyclic strain rate appliedalong the interface,the growth exponent of Kirkendall voids increases with increasing the strain rate when the strain rate is largerthan1.0×10-6,while it increases initially and then decreases when the strain rate is smaller than9.0×10?7.The growth exponent ofKirkendall voids increases initially and then decreases gradually with increasing the length of cyclic period under a square-waveform constant strain rate. 展开更多
关键词 Kirkendall void binary alloy phase field crystal method growth exponent DEFORMATION
下载PDF
Measurements of Hydrate Equilibrium Conditions for CH4, CO2, and CH4+C2H6+C3H8 in Various Systems by Step-heating Method 被引量:8
20
作者 陈立涛 孙长宇 +3 位作者 陈光进 聂运强 孙占松 刘延涛 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2009年第4期635-641,共7页
Phase equilibrium conditions of gas hydrate in several systems were measured by the step-heating method using the cylindrical transparent sapphire cell device.The experimental data for pure CH4 or CO2+deionized water ... Phase equilibrium conditions of gas hydrate in several systems were measured by the step-heating method using the cylindrical transparent sapphire cell device.The experimental data for pure CH4 or CO2+deionized water systems showed good agreement with those in the literatures.This kind of method was then applied to CH4/CO2+sodium dodecyl sulfate(SDS)aqueous solution,CH4/CO2+SDS aqueous solution+silica sand,and(CH4+C2H6+C3H8)gas mixture+SDS aqueous solution systems,where SDS was added to increase the hydrate formation rate without evident influence on the equilibrium conditions.The feasibility and reliability of the step-heating method,especially for porous media systems and gas mixtures systems were determined.The experimental data for CO2+silica sand data shows that the equilibrium pressure will change significantly when the particle size of silica sand is less than 96μm.The formation equilibrium pressure was also measured by the reformation of hydrate. 展开更多
关键词 equilibrium condition HYDRATE step-heating sodium dodecyl sullate silica sand
下载PDF
上一页 1 2 下一页 到第
使用帮助 返回顶部