查询词典 engine block

PEG-PLA block copolymers were synthesized using polyethylene glycol and lac-tide in the presence of low toxic stannous octoate. The copolymer structure was determined by 13C NMR and the average block leng this were calculated.

本文报道聚乙二醇在辛酸亚锡存在下与丙交酯反应合成PEG-PLA嵌段共聚物，用~(13)C NMR测定了共聚物的结构，估算了平均链段长度。

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。

In Block Du 84, the main hyper-heavy oil block in Area Shu 1, vertically develop Neogene Guantao oil layer and Palaeogene Xinglongtai oil layer, constituting the main hyper-heavy oil layers.

辽河油田杜84块是曙一区超稠油主力含油区块，纵向上发育有新近系馆陶油层和古近系兴隆台油层两套超稠油主力含油层系。

Under certainconditions,SBS molecules can not form polymolecular micellmicelle because of longer PS block or shorter PB block.

研究表明：SBS在PS嵌段的选择性溶剂中的胶束行为与共聚物组成、嵌段长度，微观结构及溶液浓度和温度有关。

Succinylcholine-inducedneuromuscular block had the following characteristics: 1 twitchaugmentation before twitch depression, which was seen more frequentlyin patients given smaller doses (0.1 and 0.3 mg/kg) than inthose given larger doses (0.5–1.0 mg/kg); 2 TOF fadeduring onset and recovery of the block; 3 tetanic fade; and4 and posttetanic potentiation.

琥珀胆碱诱导的神经肌肉阻滞具有以下特点：1）抽搐增强先于抽搐抑制，小剂量（0.1~0.3mg/kg ）比大剂量（0.5~1.0mg/kg ）更明显；2） TOF 衰减贯穿于阻滞的开始和恢复；3）强直衰减；4）强直后易化。

In vitro experiments have been conducted based on animal model simulating pupillary block, then the consititutive equation of the iris has been obtained, pupillary block force was evaluated.

通过建立瞳孔阻滞的动物模型，对其进行离体实验研究，得出了虹膜组织的本构关系，并对瞳孔阻滞力进行了部分定量测量。

G. seismetic data post-stack processing technique, multi-component demarcating technique, elaborate description technique for the fault-block structure, technique of layer forecasting, fault sealing analysis technique, comprehensive estimate technique of fault-block, comprehensive analysis and estimate technique of remaining oil etc.

本文从构造评价、储层评价、断层封堵性评价、封闭史评价、含油性评价及剩余油评价等多方面研究和揭示复杂断块油藏和剩余油形成机制和分布规律，并利用地震资料叠后处理技术、多元综合标定技术、精细断块构造描述技术、储层预测技术、断层封堵分析技术、断块综合评价技术、剩余油综合分析与评价等技术对惠民凹陷复杂断块综合研究、描述和预测，形成一套配套新技术。

The relationships between the eigenvalues of Jacobi iteration matrix and the block AOR iteration matrix make a very important role in our analysis. Then we prove some sufficient conditions for the semiconvergence of the block AOR method.

利用块AOR迭代矩阵和相应的块Jacobi迭代矩阵的特征值之间所存在的关系，我们证明了求解奇异p-循环线性方程组的块AOR迭代法半收敛的一些充分件。

Pain Relief After Arthroscopic Shoulder Surgery: A Comparison of Intraarticular Analgesia, Suprascapular Nerve Block, and Interscalene Brachial Plexus Block

肩关节腔镜术后三种镇痛方法之比较：关节腔内镇痛，肩胛上神经阻滞和肌间沟臂丛神经阻滞

there is no need to insertion a temporary pacemaker for patients with chronic bifascicular block but without symptoms and atrio-ventricular block. teap is a easily way to evaluation atrio-ventricular conduction ability quantizely.

术前无症状不伴有房室传导阻滞的慢性双支阻滞病人没必要常规安装临时起搏器，食道心房起搏对评价房室传导功能有量化效果且简单易行。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。