高负载

The results showed polymeric diaryliodonium salts were effective aryl ion transfer reagents. Thirdly, a new type polymer supported hypervalent iodine reagents poly { [4-Hydroxy iodo] styrene} has been developed. It was an effective oxidative reagent, and could be applied to the one pot synthesis of 4-arylthiazoles.

然后，我们以聚苯乙烯羟基对甲苯磺酰氧基碘苯为原料，成功制备了一类新型聚合物高碘试剂—聚苯乙烯负载的炔基碘盐，并研究了其作为炔基转移试剂的有效性：(1)该试剂可对硫、氮、硒等负离子进行亲电炔基化反应，合成炔基亚砜、0，0-二烃基二硫代磷酸炔基酯、1-苯乙炔基苯并噻唑以及炔基硒醚。

The complex was characterized by FT-IR, XRD, BET, SEM and EDS. The resin-supported catalyst exhibited high catalytic activity in the Heck reaction and could be reused up to 17 times in NMP or 16 times in DMF at 90 ℃ in the Heck reaction of iodobenzene with acrylic acid.

该负载型催化剂对Heck反应表现出高的催化活性和很好的重复使用性能，于90℃的碘苯与丙烯酸的Heck反应中，在NMP溶剂中能重复使用17次，在DMF溶剂中能重复使用16次。

In this project, to overcome those difficulties, a high performance, cost effective direct drive position control system with an ironless linear permanent magnet synchronous motor is proposed.

步进马达由於其开回路控制、可靠性高、免维护以及低价位等特性，因此被广泛应用於运动控制系统；然而步进马达之输出性能受限於输入脉波的频率及外加之负载型态。

Secondly, the silver based catalysts modified by phosphorus, zirconium, zinc, potassium and so on using molecular sieve as carrier, which were produced by ion-exchange method, had also good catalytic performance for 1,2-propane glycol oxidation to methylglyoxal. The conversion of 1,2-propane glycol and the selectivity of methylglyoxal were both high, and the impurity such as formaldehyde and acetaldehyde in the product is little. At the condition of the temperature 300 ℃, the molar ratio of oxygen to 1,2-propane glycol 1.7:1, the space velocity 6000h~(-1), and the concentration of 1,2-propane glycol 70wt%, the conversion of 1,2-propane glycol is 90% and the selectivity of methylglyoxal is 45% on the Ag-P catalyst.

其次对采用离子交换法制备的负载在分子筛上的银系催化剂进行了研究，发现此催化剂在助催化剂磷、锆、锌、钾等的作用下对丙二醇的低温氧化脱氢具有很高的活性，可以得到较好的丙酮醛的收率，并且产物中的甲醛、乙醛副产物的量比较低；经过对Ag-P催化剂上反应条件的考察，发现当温度为300℃、氧醇比1.7：1、空速6000h~(-1)、丙二醇浓度为70wt%时，丙二醇的转化率为90%，丙酮醛的选择性为45%。

The results also suggest that zeolite-encapsulated vanadium picolinic complexes catalyst can prevent the formation of μ-O dimer and possess high stability as compared to homogeneous catalyst. Moreover, heterogeneous catalyst can be recycled.

实验中还发现，均相络合物负载于分子筛中能够有效地抑制μ-O键二聚物的生成，使非均相催化剂具有更高的稳定性，并且能够回收利用。

Yet, reignition overvoltage might do harm to transformer coils by cumulative effects for its surge steepness. The measures lies in setting parallel connection capacitance in practice working.

结果表明，尽管实际中切除空载变压器过电压的幅值并不是很高，特别是带负载变压器的情况，但重燃过电压的陡度较大，对变压器绕组的纵绝缘有累积作用，在实际工作中应以并联电容为基础的限压装置。

In the paper,vacuum circuit breaker switchingtransformers process is simulated with Saber software and parameters are analyzed Theresults indicate that overvoltage peak value of switching no load transformers is not muchhigh,especially for switching load transformers.Yet,reignition overvoltage might doharm to transformer coils by cumulative effects for its surge steepness.The measures liesin setting parallel connection capacitance in practice working.

本文利用Saber仿真软件对真空断路器切除变压器的一个完整过程进行了仿真计算，并详细分析了各种参数对过电压的影响，结果表明，尽管实际中切除空载变压器过电压的幅值并不是很高，特别是带负载变压器的情况，但重燃过电压的陡度较大，对变压器绕组的纵绝缘有累积作用，在实际工作中应以并联电容为基础的限压装置。

The high activity can be attributed to the following factors: 1 Because of the perovskite structure of the host materials, the positive and negative electric charge center is not superposable, and there is a electric field which can separate the photo generated electrons and holes efficiently in the microscopic field.

以层状基质热稳定性分析为依据，经过对制备方法的优化，在不同温度下进行硫化处理，在对催化剂进行产氢性能研究时发现，在以硫化钠和亚硫酸钠为牺牲剂的产氢体系中，插入硫化镉的复合层状催化剂负载一定量铂以后，具有较高的连续的光催化分解水的能力。

A new technology to synthetize trans-1,4-polyisoprene with bulk precipitation polymerization in the presence of supported Titanium catalysts was introduced, and the technogical process , its economical and qualty index were discussed.

简要介绍了采用负载钛体系催化异戊二烯本体沉淀聚合法合成高反式-1，4-聚异戊二烯的新技术、工艺流程和技术经济指标。

Muscular and handsome breed of working dog known for its distinctive white mask and dark widow's peak; also called Arctic sled dog; double coat is thick, of medium length, coarse, and insular and comes in various shades of gray with lighter white and darker black areas; ears relatively small compared to head and are erect and slightly rounded at ends; tail is bushy and carried gaily and loosely curled over rump; eyes are almond-shaped, wolflike yet trusting, and light brown in color; adult stands 20 25 in.(51 64 cm) tall at shoulders and weighs 50 85 lbs (23 39 kg); firm, compact feet allow dog to pull heavy loads through deep snow; where the Siberian husky is designed for speed, this breed is designed for power; very fond of people, especially children; enjoys rolling around in snow and prefers outdoor life; great at sled-pulling contests; named after the Mahlemuts, nomadic and skilled Inuit people who migrated from Siberia over a land bridge into northwestern Alaska with these dogs thousands of years ago.

爱斯基摩犬是工作犬的一支，肌肉发达，英俊潇洒，因其与众不同的白色双颊和暗色额头&V&型发尖而闻名，它也被称为&北极雪橇犬&；厚而粗糙适中长度偏狭的双层毛皮，以多样化的灰度梯度混杂着轻度的白色和深黑区域表现出来；耳朵相对头部较小，挺立并轻微地环绕在头部末位；尾巴浓密的，松弛地卷曲盘绕在臀部上方；眼睛呈杏仁状，狼一般的长相，值得信赖，毛色呈浅棕色；成年犬站立肩高51—64厘米，重23—39公斤；牢固坚实的足部使得爱斯基摩犬能够拉动重负载在深厚的雪中前进；如果说西伯利亚哈士奇被认为是速度的象征，爱斯基摩犬被认为是力量的象征；它们喜欢人类，尤其是孩子，喜欢在雪中滚动，尤其喜欢户外生活；非常擅长牵引雪橇的竞赛；它以爱斯基摩而命名，游牧和富有经验的因纽特人在几千年前和这些狗一起从西伯利亚通过北方大陆桥迁移到阿拉斯加。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。