查询词典 D.A.

Especially, if we let Φ denote the mininal Q process, and A denote the corresponding infinitestmal operator, then the primary problem is how to describe the infinitesimal operator ,D

特别地 ，记最小Q过程为Φ，对应的无穷小算子为 A ，我们的首要问题是如何刻划最小Q过程的无穷小算子 A ，D

He holds a bachelors degree, a Ph.D. in political science, and a Juris Doctor degree from Harvard University.

他毕业于哈佛大学，在那儿获得了政治学学士和博士学位，并持有哈佛大学的J.D。

A low-power dissipation keyboard in portable measuring instrument, based on A/D converter method, is proposed in this paper.

摘 要 本文提出了便携式测量仪器中基于A/D转换器的低功耗键盘的设计方案。

We mean a two-particle system with the particles held at a fixed distance from each other by a rigid massless rod of length d.

我们意指一个两粒子体系，粒子之间借助于一长度为d的刚性无质量棒而保持固定距离。

By the definition of Green-relation and the analogue of generalized Greens lemma, this paper first studied some properties of H-class、 D--class of rpp semigroups, then by left S-system 、-bisystem and tensor product, we described a blocked Rees matrix semigroup. Especially, the paper studied primitive rpp semigroups .

本文利用在rpp半群上定义的广义Green~(l-关系及相应的广义Green定理，首先研究了rpp半群H~(l-类、D~(l-类的若干基本性质，然后以左S-系、-双系和张量积作为工具，刻画了块Rees矩阵半群结构，最后从带零的本原rpp半群出发，构造出A型块Rees矩阵半群，并证明了一个半群S为本原rpp半群，当且仅当S同构于一个A型块Rees矩阵半群。

Entire county breeds a village without milk cow, raise dispersedly for farmer entirely, breed a raise to raise head of grown milker 2~3 for the most part, raise 5 at most, the grand door guard with tallish quantity yield a milk produces per year head of 2 200 Kg/ on average suckle 260d in order to produce, computation, produce D of · of head of grandma 8.5 Kg/ on average, other 5 villages and towns are average head of 1 700 Kg/...

全县无奶牛养殖小区，全部为农户分散饲养，大部分养殖户饲养成年乳牛2~3头，最多养5头，产奶量稍高的浩门镇平均年产2 200 kg/头以产奶260d，计算，平均产奶8.5 kg/头·d，其他5个乡镇平均1 700 kg/头。。。

It is shown from the study results that (1) SSC has obvious neap-spring and seasonal variations with periods being 14.7 days and 368 days, respectively, on an average, SSC during the spring tide was 2.96 times as much as that during the neap tide, and SSC in winter was twice as much as that in summer;(2) correlation coefficient between daily SSC and tidal range on the same day in a mean neap-spring period of 15 days was 0.86, and correlation coefficients between tidal range and daily SSC with one day and two day lag were 0.99 and 0.93, respectively, which indicates that the effect of tidal range variation on SSC has a one day or two day hysteresis;(3) the monthly mean SSC was negatively correlated with the monthly mean water discharge at the Changjiang River Datong station, especially well with the water discharge with a lag of 19 days.

悬沙浓度具有显著的大、小潮和季节性变化，变化周期分别为14.7 d和368 d，平均而言，大潮为小潮的2.96倍，冬季为夏季的2倍；2）平均大、小潮半月周期中日悬沙浓度与同日潮差之间的相关系数为0.86，与前1日潮差之间的相关系数为0.99，与前2日潮差之间的相关系数为0.93，反映潮差变化对悬沙浓度的影响有1~2d的滞后效应；3）月均悬沙浓度与长江大通站的月均流量呈显著负相关，尤其与流量滞后19d的相关性最好。

Prop3.15 Let A be a normal operator.

D ｛0｝；（3） R（。一川二川人0—A） 0.d N人。

It is interesting that he used the key of G major for his keyboard version of a C major composition on the violin, and D minor for the A minor Partita.

有趣的是在小提琴上，他以G大调为主音，演奏C大调键盘版本的曲子；演奏用D小调代表A大调的变奏曲。

A:Group1,widely opened by 20 μg·kg-1 of AD;B:Group 2,moderately opened by 10μg·kg-1 of AD;:Group 3,Slightly opened by 5μg·kg-1 of AD;D:Group 4,except a non-BBB area,pineal body,BBB was not opened in adjacent brain area by 3μg·kg-1 of AD.

a：第一组，AD 20 μg·kg-1引起的广泛开放；B：第二组，AD10 μg·kg-1引起的中度开放；C：AD 5 μg·kg-1引起的轻度开放；D：除缺乏BBB的松果体之外，AD3 μg·kg-1未引起其它脑区的BBB开放

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。