环

Moreover, the equivalance between regularity of a ring and a full matrix ring is proved with a new method.

当 R是一个有单位元的环时，本文引进并刻划了Mm× n的正则性并由此重新证明了环 R与全矩阵环 Mn正则的等价性，这种方法比原有的证明方法简

Finally it is shown that if R is a ring with a nonzero local powerzero ideal then the matrix ring is a NCI ring.

最后证明了如果环R存在非零的局部幂零理想I那么R的全矩阵环Mn是NCI环。

The author determines necessary and sufficient conditions for a forinal triangular matrix ring to be V-ring or semi- V-ring.

给出了形式三角矩阵环 R 是V-环或半 V-环的充要条件。同时

Its action is different from the Central Materials, 60A and 60C of the actin ring are made of cemented carbide YG6, and 60B of the fixed ring, the matrix material for oCrl8N112M02Ti, sealed in its side surface with a layer of surfacing thickness 1.5mm the hard alloy.

其动环材料有所不同，60A和60C的动环都是由硬质合金YG6制成的，而60B的动环，其基体材质为oCrl8N112M02Ti，在其密封端面上堆焊有一层厚度为1.5mm的硬质合金。

The outer edge of the B ring which forms the inner boundary of the Cassini division is maintained by a gravitational resonance with Mimas. Near the outer edge of the A ring are the Encke Gap (325 kilometers, or 202 miles wide) and the barely visible Keeler Gap (35 kilometers, or 22 miles wide).

形成卡西尼环缝内缘的B环外侧的形状由其与土卫一的引力共振保持。A环外侧是恩克缝（宽325公里，202英里）和勉强能看到的科勒缝（宽35公里，22英里）。

Therefore, studies and applications of the ring-opening reaction of 1, 3-dithiolancycolpentyl moiety should be a valuable research project.

因此，α-羰基环二硫缩烯酮的1， 3-二硫戊环的开环反应及其在合成中的应用研究是一重要的研究课题。

The result of situ-FTIR study on the process of dehydrogenation of CHL, we concluded the reaction mechanism, and proved that monovalence copper had more activity than zero valence copper and the side reaction mainly took place on zero valence copper.

通过对环己醇脱氢反应过程的原位傅立叶变换红外光谱研究，推导出了反应机理，得出Cu〓较Cu〓更具有环己醇脱氢活性，环己醇脱氢的副反应主要发生在Cu〓上。

Cassini imaging scientists analyzing images acquired over the course of about 600 days found the tiny moonlet, half a kilometer across, embedded within a partial ring, or ring arc, previously found by Cassini in Saturn's tenuous G ring.

卡西尼小组的成像科学家在分析了600多天来获取的图像时发现了这一小卫星，直径约1公里，镶嵌在一段环弧中。这段环弧是由卡西尼飞船早先在土星纤细的 G 环中发现的。

Then several structural theorems of regular power rings and uniform power rings are established respectively and the uniqueness of the multiplication of a regular power ring is proved.

建立了正则幂环与一致幂环的结构定理，并证明了正则幂环的乘法运算的唯一性。

There are two loops in the control circuit which the feedback of the output voltage is the outer loop. In this loop there is a voltage error amplifier, a squarer, a divider and a multiplicator.

控制电路采用双闭环，外环输出电压反馈构成电压环，由电压误差放大器和一个平方器，一个除法器，及一个乘法器构成。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。