An edge-face-intersecting approach is developed and employed to determine the containment relationship between any two fundamental loops in each quadratic surface.
针对基于工程图的曲面体重建 ,在现有的基于边界表示模型 (B reporiented)的重建方法中 ,提出了“线面交点计数判别法”来判断曲面上基环之间的位置关系 ,即曲面上顶点和多边形的包含关系 ,建立各表面上的基环位置关系树 ,并据此构造实体模型的候选面片 最后 ,根据二维流形 (2 manifolds)的性质和莫比乌斯法则 (M biusrule)以及正投影规律从候选面片中提取面序列和确定性面序列 ,将符合条件的面片和面序列装配成实体 这些方法的提出与应用 ,将传统的处理对象由平面拓展到二次曲面 ,从而扩大了形体的重建覆盖域 ,同时减少了候选面片的组合判定次数 ,提高了重建效
It builds the elementary solids by matching the fundamental loops of 2D orthographic projections,and gets the solution solid by Boolean operations.
首先通过二维视图的基环匹配构造拉伸体元,然后通过布尔运算求得最终实体。
63% selectivity to cyclohexylbenzene.
在催化剂用量x(离子液体)=4%,n(苯)/n(环己烯)=15、反应温度为80℃及常压反应条件下,环己烯的转化率达100%,环己基苯的选择性可达到89。
The Pd/Hβ binary catalyst was prepared by the impregnation method and was used for the hydroalkylation of benzene to cyclohexylbenzene.
采用浸渍法制备了Pd/Hβ双功能催化剂,并用其催化苯加氢烷基化反应合成环己基苯,考察了反应温度、反应时间、氢气压力、载体的酸性和催化剂的金属担载量对反应的影响。
The components of the electrolytes were as follows: 1) ethylene carbonate (EC), dimethylene carbonate (DMC), ethylmethyl carbonate (EMC); 2) EC, DMC, EMC+4% biphenyl (BP); 3) EC, DMC, EMC+4% cyclohexylbenzene (CB).
制备了 3种 1mol/LLiPF6电解液 ,溶剂组成分别为 :1)碳酸乙烯酯 ,碳酸二甲酯和碳酸甲乙酯 ;2 )碳酸乙烯酯 ,碳酸二甲酯 ,碳酸甲乙酯和 4 %联苯 ;3)碳酸乙烯酯 ,碳酸二甲酯 ,碳酸甲乙酯和 4 %环己基苯。
Synthesis and Properties of the Hydrophilic Copolymer Support Containing Oxirane for Immobilized Penicillin Acylase;
含环氧基亲水性固定化青霉素酰化酶共聚载体的合成与性能研究
Preparation of 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylate with phase transfer catalysis method
相转移催化法制备3,4-环氧基环己基甲酸-3′,4′-环氧基环己基甲酯
2,4-dimethylcyclotetramethylene sulfone
２,４－二甲基环四甲撑砜
Environmental Defense Fund
环境保护基金[美]
cyclotr imethylene trinitramine
环三次甲基三硝基胺
epoxy propyl-trimethyl ammonium chloride
环氧丙基三甲基氯化铵
fundamental cycle
基本闭(下)链,基本循环
Global Environment Trust Fund
全球环境信托基金（环境基金）
Geological environment and geomorphological environment are basic ones on the earth's surface.
地质环境和地貌环境是地球表面最基础的环境。
Tandem Ring-Opening/Closing Reactions of N-Ts Aziridines and Aryl Propargyl Alcohols
氮杂环丙烷和芳基炔丙醇的串联开环关环反应
Trust Fund on Environmental Performance Reviews and "Environment for Europe"
环境性能审查和“欧洲环境”信托基金
testing methods for epoxy equivalent of epoxide resins
环氧树脂中环氧基当量的测定
Studies on Mutagenicity of Bis(2,3-epoxy- cyclopentyl) Ether
双(2,3-环氧-环戊基)醚致突变性研究
On the Legal Benefit of Environmental Law--A Recognization on the Basis of Environmental Law
论环境法法益:对环境法基础的再认识
Novel Explicit Force Control Strategy Based on Impedance Inner Control
基于阻抗内环的新型力外环控制策略
Construction of QC-LDPC Codes based on Cyclic Groups
基于循环群的准循环LDPC码构造
hetero-nitro-compound explosive
杂环硝基化合物炸药
epoxide woven glass fabric copper-clad laminates
环氧玻璃布基覆铜箔板
epoxypropyl methacrylate
甲基丙烯酸环氧丙酯