查询词典 R.Q.

Some problems about Capon ADBF were discussed: how to obtain weight vector by means of the Q-R decomposition; the affection of the mixing signal bandwidth.

对Capon波束形成作了相关讨论，研究了在数据域利用Q-R分解法求解权矢量的方法；分析了中频信号带宽对单矢量加权Capon波束形成的影响。

On a smooth and insulating ring of radius R there is a small ring of mass m and carrying charge q.

一半径为R的光滑绝缘大圆环上有一质量为 m带电为q的小环。

The M Q algorithm has been applied to the second order elliptic problems with the Dirichlet boundary conditions,and the so called R condition is involved in the convergence theorem and the optimal relaxation parameter.

M-Q算法所考虑的是二阶椭圆型Dirichlet边值问题，此时有所谓的R条件成立，算法的收敛定理以及松弛因子的选取都需要该条件。

If Q and R are equidistant from L, find the equation of L.

b 若 Q 及 R 至 L的距离相等，试求 L的方程。

Then one solution would be for Shell to build at P,Esso to build as Q,B.P.as S,and Gulf at T,leaving either Shell or Gulf to build at R;however,if Gulf decides to back out of the whole agreement,then it is clearly impossible for the other three companies to erect the garages in the specified manner.

那么一种解决方法是Shell在P处修建，Esso建在Q处，B.P建在S处，Gulf建在T处，留下一个由Shell或Gulf建在R处；然而如果Gulf退出这一协议(在R和T建汽车修理厂)，则很显然，对其他三家公司来说，无论如何也不可能按照所约定的方式修建汽车修理厂。

Using the presentation, suppose that M is the maximal ideal of a commutative local domain R and R/M=F〓 is a finite field with q elements, a generating set of elements at most is obtained for K=Coker K〓

设M为交换局部整环R中极大理想，R/M〓F〓为q元有限域，由这个表现得到了K=Coker的一个至多含有个元素的生成元集。

On the other hand, a Japanese syllable can be abbreviated asV, where R is the second half of a long vowel,-G the moraic off-glide of a diphthong, N the mora nasal, Q the mora obstruent, and C, G, V are as in Chinese.

至於日文的音节﹐如在C、G、V外再加上长母音后半部的R双母音第二要素-G末尾鼻音N及促音Q﹐则可简写为V。

Particularly,when A is positive,we give a detailed characterization of the set ∏={Q∈∏:R=S⊥,AQ=QA},where ∏ and S⊥ denote the set of all idempotents on H and the orthogonal complement of S,respectively.

特别地，当A是正算子时得出了集合∏={Q∈∏：R=S⊥，AQ=Q*A}非空的充要条件；并且对集合∏进行了详细的刻化，这里∏和S⊥分别表示一个复Hilbert空间上的所有幂等算子构成的集合和子空间S的正交补空间。

In polar coordinate, when it is the axisymmetric bend of circular sheet, differential equation of elastic curved face can be q written as: 2 2 w = D or d 2 1 d d 2 w 1 dw q 2+ 2 += dr dr r dr r dr D

如果圆形薄板所受的横向载荷是绕z 轴对称的，则该弹性薄板的位移也将是绕z 轴对称的，即是r 的函数，不随θ而变。

Density Functional Theory method was used to optimize the geometries of 209 PCDE molecules, 209 PBDE molecules and 75 PCDD molecules at the B3LYP/6-31G* level. Using computed structural parameters as theoretical descriptors, the forward stepwise multiple regression technique was adopted to obtain QSPR models of environmental partition properties for these POPs by using GQSARF 2.0 and SPSS12.0 for windows programs. The obtained QSPR models are as follows:(1) QSPR models for predicting subcooled liquid vapor pressure, n-octanol/water partition coefficients lgK_(ow and subcooled liquid water solubilities -lgS_(w,l of PCDEs, of which correlative coefficients (R~2) are 0.988, 0.958 and 0.959 and the root-mean-square-error of estimation are 0.134, 0.116 and 0.327 respectively.(2) QSPR models of lgPL and n-octanol/air partition coefficients lgK_(oa for PBDEs, which both contain three structural parameters. The values of R2 for the two models are both 0.997 while the values of RMSEE are 0.073 and 0.062 respectively.(3) QSPR models of lgKow and–lgS_ for PCDEs, which both have one variable (mean molecular polarizability,α). The values of R~2 for the two models are 0.978 and 0.866 and the values of RMSEE are 0.300 and 0.270 respectively.(4) The molecular structures of 24 substituted naphthaline compounds were optimized using Hartree-Fock and DFT methods at four different levels and the same means was used to obtain four three-parameter (EHOMO, q~+ andα) QSPR models of lgK_. The model at the HF/6-311G** level is the best one of which R2 is 0.9662 and RMSEE is 0.380.(5) QSPR study for environmental partition properties of PCDEs was also performed using position of Cl substitution method in which simple parameters of substitution position were taken as descriptors. The multiple linear regression was performed with GQSARF 2.0 and SSPS 12.0 for windows programs to obtain QSPR models of lgP_L, lgK_ and–lgS_ for PCDEs of which R~2 are 0.991, 0.983 and 0.965 and RMSEE are 0.311, 0.100 and 0.300 respectively.

采用密度泛函理论方法在B3LYP/6-31G*水平上对PCDEs、PBDEs和PCDDs的分子结构进行了全优化计算，以计算得到的量子化学参数作为理论描述符，采用GQSARF 2.0和SPSS 12.0 for windows统计程序进行正向逐步回归分析，建立了这些POPs的环境分配性质的QSPR模型：(1) PCDEs的过冷液体蒸汽压、正辛醇/水分配系数lgK_(ow和水溶解度-lgS_(w，l的QSPR模型，这3个QSPR模型的相关系数(R2)分别为0.988、0.958和0.959，估计的均方根误差分别为0.134、0.116和0.327；(2) PBDEs的lgPL和正辛醇/空气分配系数lgK_(oa的QSPR模型，这两个模型都包含三个分子结构参数，其R~2都为0.997，RSMEE分别为0.073和0.062；(3) PCDDs类化合物的lgK_和-lgS_w的QSPR模型，两个模型都只含一个变量，其R~2分别为0.978和0.866，RSMEE分别为0.300和0.270；(4)采用Hartree-Fock和DFT方法，在4种不同水平上优化计算了24个取代萘系列化合物的分子结构，采用上述同样的方法分别建立了四种水平上的三变量lgK_模型，通过比较得到，在HF/6-311G**水平计算得到的模型最好，R为0.966，RSMEE为0.380；(5)同时，采用氯原子取代位置方法对PCDEs的环境分配性质进行QSPR研究，建立了PCDEs的lgPL、lgK_和-lgS_的QSPR模型，其R~2分别为0.991、0.983和0.965，RSMEE分别为0.110、0.100和0.300。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷