- 更多网络例句与嵌环相关的网络例句 [注:此内容来源于网络,仅供参考]
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The axially symmetric torsion of rigid circular shaft of varying diameter embedded in an elastic half space is studied by line-loaded integral equation method, where the problem is formulated by distributions of fictitions fundamental loads PRCHS (point ring couple in half space) along the axis of symmetry in interval of the shaft and is reduced to a one-dimensional and non-singular Fredholm integral equation of the first kind and is easily solved numerically.
弹性半空间;本文用线载荷积分方程法研究嵌在弹性半空间的刚性变直径圆轴的轴对称扭转。利用将"半空间的点环力偶"这一虚的基本载荷沿对称轴的圆轴区间中分布就能使本问题归结为一个一维的非奇异的Ferdholm第一种积分方程,且很易用数值求解。文中给出刚性圆锥,圆柱,圆锥柱嵌在弹性半空间的扭转的数值计算的例并和他人的已知结果相比较。
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We prepared a serious of functional polymers with RAFT method.First we synthesize a tri-block polymer.One end is hydrophobic PMMA and the other end is hydrophilic PtAA,the middle is the functional epoxy group,which can be fluorinate by CF_3COOH.
本文运用RAFT方法合成了一系列不同链长比例的三嵌段共聚物:聚—聚—聚(PMMA-b-PGMA-b-PtBMA),然后利用GMA中含有的环氧官能团,合成含氟的一段,最后将PtBMA一段酸解为亲水段PtAA,即形成了双亲双憎的嵌段共聚物。
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First, we synthesized a new monomer,1-(3\'-aminopropyl)-4-acrylamido-1,2,3-triazole hydrochloride,via click chemistry and its block copolymer with NIPAM, PNIPAM-b-PAPAT,via RAFT polymerization.On the basis of the reaction between amine groups of the PAPAT block and glutaric dialdehyde,core cross-linked and shell cross-linked micelles with inverted structures were prepared at 25℃and 50℃,respectively.
借助于PAPAT嵌段上含有的氨基及PNIPAM嵌段的LCST效应,我们在其20℃和50℃的水溶液中分别制备了CCL胶束和SCL胶束,进一步地,我们利用由Click反应产生的1,2,3-三氮唑环对金属的强络合和稳定作用,分别对CCL胶束的内核与SCL胶束的外壳用金纳米粒子进行选择性修饰。
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Inside benzene or toluene solvent, in the presence of stannous octoate as catalyst and under the conditions of no water, no oxygen, heating and stirring, MPEG and aliphatic cyclic monomer are ring-opening polymerized to obtain binary block MPEG-aliphatic polyester copolymer.
聚乙二醇单甲醚和脂肪族环酯单体,在苯或甲苯溶剂中,在无水无氧,加热和搅拌的条件下,用辛酸亚锡为催化剂,开环聚合得到聚乙二醇单甲醚-脂肪族聚酯二嵌段共聚物。
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The aim of this study was to develop a novel amphiphilic functional block poly(ε-caprolactone) bearing ketone groups MPEG-b-P(OPD-co-CL. 2-oxepane-1, 5-dione was copolymerized with ε-caprolatone in which methoxy poly (MPEG, Mn=5 000) and stannous octoate were used as initiator and catalyst, respectively. The syntheses were conducted by bulk and solution polymerization. 1H NMR results showed that peak position and splitting of the polymers synthesized through solution polymerization were consistent with theoretical data, demonstrating the products were designed block copolymers. While in the bulk polymerization, polymer peak position was changed due to their high reaction temperature, suggesting their structural variation.
将带有羰基官能团的4-羰基己内酯和ε-己内酯分别在甲氧基聚乙二醇(MPEG,Mn=5 000)为引发剂,异辛酸亚锡为催化剂溶液和本体体系中开环聚合,合成了两亲性侧基带有羰基官能团的聚己内酯嵌段共聚物MPEG-b-P(OPD-co-CL.1H NMR结果表明采用溶液聚合法合成的聚合物各峰的峰位置和分裂情况与理论一致,证明了产物是实验所设计的嵌段共聚物,而采用本体聚合法合成的聚合物由于温度的影响,聚合物各峰的峰位置发生了变化,说明其结构发生了变化;差示扫描量热法分析结果表明随着OPD单体含量的增加,聚合物的熔点,玻璃化转变温度和熔融焓增加;热失重测试结果表明OPD单体的引入增加了聚合物的热敏感性。
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In the early days of astronomy before the advent of Newton's f=ma, planetary events were predicted on Ptolemy's model of nested circular orbits -- wheels within wheels.
在天文学的早期,也就是在牛顿的f=ma出现之前,对天体事件的预测都是通过托勒密的嵌套圆形轨道模型——一环套一环的复杂模型——进行的。
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AFTN demulsifiers of polyoxypropylene-polyoxyethylene amine ethers are synthesized from oxypropylene, oxyethylene and amine under a lower pressure less than 0.5 MPa and in the presence of the KOH catalyst, oxypropylene polymerizes at (130±5)℃ temperature, and oxyethylene polymerizes at (120±5)℃ temperature.
以伯胺为起始剂、氢氧化钾为催化剂,分别以环氧乙烷[开环聚合温度为(120±5)℃]和环氧丙烷[开环聚合温度为(130±5)℃]为单体,在0.5 MPa以下合成AFTN系列嵌段聚醚型破乳剂。
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Mould from the fixed die board and board of movable mould , cut mouth inlay piece and mould base inlay piece, gaskets board as well as the etc. parts of fixed head form .
模具由动模板、定模板、切割环、模口嵌块、模底嵌块、密封垫板以及固定板等部件组成。
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The binding molecular mechanism of R,R-SA-Pt and DNA was investigated by 13CNMR and DNA viscosity titrations.
结果:发现环方铂是通过方酸根的离去与DNA碱基之间形成共价键而结合的,而环斑铂是通过嵌插到DNA碱基对之间以非共价方式与DNA结合的。
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On the basis of theoretical result of convex polyhedra, the thesis includes two parts of research which aim at different problems.
多面体链环是由多个环相互嵌套成的具有多面体形状的一种拓扑几何结构。
- 更多网络解释与嵌环相关的网络解释 [注:此内容来源于网络,仅供参考]
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lanyard thimble:镀锌三角形绳环
lanyard stuff 四股油绳 | lanyard thimble 镀锌三角形绳环 | lanyard thimble 张紧索嵌环
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lanyard thimble:张紧索嵌环
lanyard thimble 镀锌三角形绳环 | lanyard thimble 张紧索嵌环 | lanyard 短索
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SBS:苯乙烯-丁二烯-苯乙烯嵌段共聚物
笔者曾研究过由环氧化(苯乙烯-丁二烯-苯乙烯)嵌段共聚物(SBS)与硫酸氢盐开环反应制备新型硫酸盐基SBS离聚体及其表征,也报道过磺化橡胶离聚体的力学性能及其与聚丙烯或高密度聚乙烯共混呈现协同效应[1,2],
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shrunk ring:烧嵌环
烧嵌凸缘 shrunk flange | 烧嵌环 shrunk ring | 关断闸 shttting flap
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thill:底粘土 耐火粘土厚层
thigmotropism 向触性 | thill 底粘土 耐火粘土厚层 | thimble 壳筒 活动套管 铁制嵌轮 穿线环 嵌环 顶针
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thimble:嵌环
thigh boot统高至大腿之靴子 | thimble嵌环 | thimble hole centerline嵌环恐中心线
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steel thimble:钢嵌环
"钢制推拔冲销","steel taper drift" | "钢嵌环","steel thimble" | "钢枕(铁路)","steel tie"
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thimble location:嵌环孔位置
thimble hole centerline嵌环恐中心线 | thimble location嵌环孔位置 | thin shade浅色调
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paraphimosis:嵌顿包茎
嵌顿包茎(paraphimosis)是包茎或包皮过长的并发症. 当包皮被翻至阴茎头上方后,如未及时复位,包皮环将阻塞静脉及淋巴循环而引起水肿,致使包皮不能复位造成嵌顿包茎. 包皮发生水肿后,包皮狭窄环越来越紧,以至循环阻塞及水肿更加严重,
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Thimbles:嵌环(支撑环)
半圆键 woodruff keys | 嵌环(支撑环) thimbles | 机器螺钉和垫圈组合件 screws and washers assemblies