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It is shown that in complex system like L-tyrosine, using a locally dense basis set with a large number of atomic basis functions for the carbon atom of interest and smaller sets of atomic functions for the other atoms can not only save the disk capacity and computing time but also produce satisfactory results.

由从头计算获得的结果与实验值符合较好,说明对于具有复杂结构的多原子体系,对杂原子使用较小的基函数,而对所关心的碳原子使用较大的基函数以提高计算精度,这样可以达到既节省计算机空间与计算时间而不影响计算精度的目的。

It was also found that the film of smaller grains corresponded to a smaller lattice constant of the garnet structure, which implied that fewer Bi〓 ions substituted into the dodecahedral sites in the garnet, due to the fact that the smaller grains resulted in more grain boundaries, thus leading to more serious Bi segregation in the grain boundaries.

分析表明,细小的晶粒意味着薄膜中含有更多的晶界,这样将导致Bi组分在晶界上的偏析较显著,而进入石榴石结构中氧十二面体间隙的Bi〓较少,对于Bi,Al∶DyIG来说,石榴石相晶格常数与{Bi〓}〓呈正相关关系,由此可以解释具有细小晶粒的薄膜对应较小的石榴石相晶格常数。

The fund, the fund manager, the proposed CengGuoFu stock dividends from its own characteristics, in the short-term market instability of the situation, the safety stock dividend is relatively high, and have a strong defensive, But in the long run, the stock dividend growth also very stable, is relatively minor fluctuations in the premise for investors YuDaPan relative excess return of.

该基金拟任基金经理曾国富表示,从红利股票自身的特点来看,在短期市场不稳定的形势下,红利股票的安全性相对较高,具备较强的防御性;而从长期来看,红利股票的成长性也十分稳健,有望在波动相对较小的前提下给投资者带来相对于大盘的超额回报。

In view of special applications of multi-pole magnetic permanent torque motor used for precise numerical control rotary table, motors with higher torque density and lower torque ripple s are needed.

针对精密数控转台伺服直接驱动用多极永磁力矩电机的特殊应用问题(要求电机有较大的转矩密度且较小的转矩波动),在分析该种电机的特殊结构的基础上,提出一种新型不等齿顶宽结构,以提高绕组利用系数,加大电机的转矩密度;并采用转子斜极的方法,可在有效消除转矩波动的同时,电机仍保持较高的绕组利用系数。

In view of special applications of multi-pole magnetic permanent torque motor used for precise numerical control rotary table, motors with higher torque density and lower torque ripples are needed.

针对精密数控转台伺服直接驱动用多极永磁力矩电机的特殊应用问题(要求电机有较大的转矩密度且较小的转矩波动),在分析该种电机的特殊结构的基础上,提出一种新型不等齿顶宽结构,以提高绕组利用系数,加大电机的转矩密度;并采用转子斜极的方法,可在有效消除转矩波动的同时,电机仍保持较高的绕组利用系数。

Minimum mold areas for platen size should always be observed, even in minimum clamp situations.

我们经常看到的是安装尺寸较小的模具(接近最小的模具安装尺寸),然后用最小的合模力。

The smaller ones are ca 70 nm wide and join the tectum and the larger columellae. These larger ones appear to be composed of several 70 nm in width rods. They join the distal surface of the foot layer. The proximal surface of the foot layer is marked by a white line (referred to as a junction plane) where it joins the endexine.

柱层中有种大小同的柱体,较小的宽约70 nm接盖顶层和较大的柱体,而较大的柱体是由多个宽70 nm的棒物所组成的,它们会和基层末端相,而基层顶端表面有著明显分布的白线特徵,就好像是它与外壁内层的接合面。

After this research work, we know that: HMCM-22 is a better catalyst of selecting naphthalene alkylation; Surface modification of zeolite Y is effective, but the effect of zeolite 3 is not evident and surface modification doesn"t suits mordenite; Surface modification doesn"t affect the frameworks and inner environments of zeolites, but only reduces diameter of orifice and overlays surface acidities; t-butanol is not suitable for alkylating agent of the reaction using modified zeolites as catalyst; Solvents with smaller molecular size are advantageous for naphthalene alkylation reaction using modified zeolites as catalyst, such as cyclohexane is better than decalin.

通过本论文的研究,我们知道:HMCM-22是萘择形烷基化反应较好的沸石之一;Y沸石的外表面改性效果较好,β沸石则效果不明显,而丝光沸石则不适于外表面改性;外表面改性不改变沸石的骨架结构和孔道内部环境,仅减小孔口直径和覆盖外表面酸性位;叔丁醇不适于作外表面改性沸石催化的反应的烷基化试剂,其反应活性很低,且选择性无明显提升;分子较小的溶剂更适于外表面改性沸石催化的反应,环己烷就明显好于十氢萘。

The shape of this goods is too bigger than other products ,for example Refresh box ,ice bucket .

由于这个产品较大,跟其它较小的保鲜盒,碗类不一样。

Its main advantages are: 1 Ploughshares former can Geng Sada narrow, sharp-angle, and then a small field can be competent. 2, spiral Ploughshares high-speed rotation, tillage Shulan soil formation, may omit rake mud, soil and other pressure Suitu site preparation process. 3, spiral Ploughshares work will push the soil later, will pull the machine forward traction, it can effort can be smaller engine-driven. 4, the spiral Ploughshares work itself traction to overcome the original style, to break through resistance to the plow, the machine tray can be fitted with the lower part of farming feet deep mud paddy field. 5, the spiral Ploughshares put on the handling round, you can use the drive shaft Ploughshares handling round, 20-30 cm wide in the small mountain ridge or drive to complete removal. 6, according to the plane of principle, can also be designed as a multi-Ploughshares, or a variety of forms, suitable for large-scale farming machinery Plain.

它的主要优点是:1、犁头在前能耕狭田窄地,田尖地角,再小的田地都可胜任。2、螺旋犁头高速旋转,被耕泥土熟烂平整,可省去耙泥、压土等碎土整地过程。3、螺旋犁头工作时将泥土往后推,有将机器往前拉的牵引力,因此可以省力,可用较小的发动机驱动。4、由于螺旋犁头工作时本身有牵引力,克服了原式华犁的对闯阻力,在机器下部装上托盘就可耕作深泥脚水田。5、把螺旋犁头换上小搬运轮,就可利用犁头轴的动力驱动搬运轮,在20—30厘米宽的小山路或田埂上行驶完成搬运。6、根据该机工作原理,还可设计成多犁头或各种形式,适合平原的大型耕作机械。

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