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某些情况
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  some cases
     a=∑x_iy_i/∑x_i~2 and b=[∑x_i~2∑y_i-∑x_i∑x_iy_i]/[n∑x_i~2] may be the extreme point too in some cases,but it is not in each case.
     a=∑x_iy_i/∑x_i和 b=[∑x_i~2∑y_i-∑x_i∑x_iy_i]/[n∑x_i~2]在某些情况下可以是极值点,但不是在每种情况下都是极值点。
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     The standard uncertainties of the new recommended values are in most cases about 1/5 to 1/12 and in some cases 1/160 times the standard uncertainties of the corresponding 1986 values. Moreover, in almost all cases the absolute values of the differences between the 1998 values and the corresponding 1986 values are less than twice the standard uncertainties of the 1986 values.
     新推荐值的标准不确定度 ,与 1986年推荐值的相应不确定度比较 ,在多数情况下 ,前者约为后者的 1/ 5至 1/ 12 ,而在某些情况下 ,则为其 1/ 16 0 .然而 ,几乎在所有情况下 ,1998年数值与 1986年相应值之差的绝对值均小于 1986年数值的标准不确定度的两倍 .
短句来源
     The purpose of this paper is to show that this conjecture is ture when k > 2r/3 in some cases.
     本文证明:当k>2r/3时在某些情况下上述猜想成立.
短句来源
     The range and average of C(Si) and C(Al) determinations in mg/L are tabulated and some analyses and discussion are made: the C(Si) and C(Al) in RAs are high and C(Al) is higher than C(Si) in some cases;
     列表给出了残酸中可溶Si、Al浓度范围及平均值(单位mg/L)并作了分析讨论:残酸中Si、Al浓度很高,在某些情况下Al浓度甚至高于Si浓度;
短句来源
     However, these new algorithms are based on computational intelligence, in some cases they are not inapplicable because of the randomness of the computational intelligence, In this thesis, the fast algorithms are studied to overcome computational randomness.
     但是这些基于智能计算的快速算法,由于在智能计算中存在一定的随机性,所以在某些情况下并不适合应用这些基于智能计算的信号稀疏分解算法进行分解。 本文的研究重点是克服计算随机性的基于MP的稀疏分解快速算法。
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  some circumstances
     2)In some circumstances,the ES barriers of Cu are lower than the ES barriers of Al, which may lead to the layer-by-layer growth.
     2)对于某些情况,Cu的ES势比同种情况下Al的ES势小.
短句来源
     In some circumstances, the target to be recognized is connected with other targets and their gray level is similar.
     在某些情况下,待识别的目标与其它物体相连在一起并且灰度值相近,这样使用单纯的灰度阈值法很难将目标分离出来。
短句来源
     Type can be used as an epistemological tool to remedy the limitation of concept because in some circumstances it is more exoteric and realistic.
     在认识论上来源于概念与社会生活的不完全契合。 弥补这一点须依赖类型这一认识工具,某些情况下,类型更开放、更接近现实。
短句来源
     Thisresult provided new evidence for the integrative function of neurons in PGL under some circumstances.
     这些结果为PGL神经元在某些情况下的心血管整合功能提供新的证据。
短句来源
     The analysis shows that barotropic processes dominate indirection of motion,but,under some circumstances,baroclinic processes dominate in its speed.
     对总涡度倾向分布和强度的比较分析,发现正压过程主导台风运动的方向,而斜压过程在某些情况下对台风移速有很大影响。
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更多       
  some conditions
     In this paper we show that the distance definition in _0(R) of reference [1] is not reasonable in some conditions with examples, then redress the distance definition and proved that complete metric space about new distance and generalized lebesque control convergent theorem remains valid in this space.
     本文通过实例说明了文献[1]中在_0(R)定义的距离在某些情况下不尽合理,从而修正了这个距离定义,并证明了在新的距离下_0(R)是完备的度量空间,且在此空间成立广义的勒贝格控制收敛定理.
短句来源
     The example analysis shows the reasons why the forecast accuracy is low when GM(1,1) model is applied in some conditions and it is greatly improved with the amendment models.
     通过算例进行验证,说明了灰色GM(1,1)模型在某些情况下精度不高的原因,通过修正使预测精度得到较大的提高。
短句来源
     The study and the data analysis indicate that TTLA can switch between IS-41 and TLA according to the CMR of the users and it can outperform both of the algorithms in some conditions.
     通过性能分析可知,TTLA算法能根据用户的呼叫移动比,在IS-41和TLA两者之间进行选择,综合性能好,且在某些情况下,性能要超过另两种算法。
短句来源
     Through analysis, we found that EPRCA is unstable in some conditions and DMRCA is marginally stable.
     经过分析,我们发现EPRCA在某些情况下是不稳定的而DMRCA是边缘稳定的。
短句来源
     Secondly, in order to solve the problem that the ROI could not be defined by the user on some conditions, and the application of the ROI coding is restricted, the ROI detection technique which is the key component of the ROI coding technique is studied.
     其次,为了解决某些情况下ROI编码技术使用受限的问题,针对ROI编码技术的关键环节——ROI的检测进行了研究。 结合对现有ROI检测算法的总结分析,本文提出了一种用于遥感图象的ROI自动检测算法,测试结果验证了该算法的有效性;
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  “某些情况”译为未确定词的双语例句
     Zero potential selection of electrostatic field can be randomly in principle,however,it's limited in some case.
     关于静电场中电势零点的选择,在原则上是可以任意选定的,而在某些情况下电势零点的选择要受到一定的限制。
短句来源
     Abstract In this paper, the deviation estimate of|f(z)|,|f(z)|,|zf′(z)f(z)|and |f″(z)f′(z)|of the furction f(z) is given ,where f(z)is in the family s(α,β)和s(α),the result in theorem 1-6 is sharp.
     这篇文章,我们获得在族S(α,β)和S(α)中函数f(z)关于|f(z)|,|f(z)|,|zf(z)f(z)|,|zf"f(z)|的估计,在定理1——6中的诸结果在某些情况都是优的。
短句来源
     In expansion with NS5b, splenocytes from alum group have significance in IL-4 production compared with other groups.
     该组IL-4的产生,在某些情况下也高于其它组。 用NS5b刺激,氢氧化铝组IL-4的产生显著高于其它4组(P<0.05)。
短句来源
     The numerical calculation is stable and the results are shown to be in good agreement with experimental results presented by Hall & Watts and Nicholas Dodd.
     计算过程稳定 ,同 Hall & Watts和 Nicholas Dodd的实验结果吻合良好 ,某些情况下比 Nicholas Dodd方法更接近实测值。
短句来源
     It turns out that the results for M/M/1/k feedback queneing systems are different from that for M/M/1 feedback queueing systems, i.e., apart from the output process, some other processes may be also Poisson under special conditions.
     所得结论表明M/M/1/k后馈系统与M/M/1后馈系统情况有所不同,即在某些情况下,除了总输出过程外,还有其它的过程也可能是Poisson过程. 顺便又对M/M/C/k前馈后馈排队系统的动态数学模型进行了严格的讨论.
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  some cases
In some cases, including analysis on Euclidean space, sphers, hyperbolic space, and certain other symmetric spaces, exact formulas for fundamental solutions to wave equations are available.
      
But in some cases, the maximum entropy prior does not exist or has unpleasant jumps.
      
The combined moment method (MoM)-physical optics (PO) approach proposed by Bilow fails in some cases.
      
In some cases, ambiol caused the formation of shoots without leaves or with rudimentary leaves.
      
It was shown that hemopoiesis was preserved or, in some cases, enhanced on sublayers of fixed (metabolically inactive) cells.
      
更多          
  some circumstances
Some circumstances impending analysis of these data are discussed.
      
In some circumstances the PHA or the IF test may facilitate a presumptive or definitive diagnosis.
      
Observations on the changes of the plate height with the retention factor and temperature lead to conclusion that in some circumstances longitudinal diffusion in the resin phase also contributes to the total plate height.
      
In some circumstances gopher tortoise relocation may be an appropriate conservation tool and can be used to help the survival of a species that is under high pressure from development.
      
In some circumstances, texture discrimination performance peaks in the parafovea rather than at the fovea.
      
更多          
  some conditions
Moreover we give some conditions so thatF*(?[t1,...,tn-1]) is the ring of invariants of φ.
      
More precisely, we show that under some conditions on X, every such automorphism is of the form Φ = ?g, where ? is an algebraic action of a linear algebraic group G of dimension 1 on X, and where g belongs to G.
      
Under some conditions on the window functions we prove that the Riemannian sums converge to f in the modulation spaces and inWiener amalgam norms, hence also in the Lp sense.
      
Let Xj,j ≥ 1 be a sequence of negatively associated random variables with EXj = 0, EX2j >amp;lt; ∞ In this paper a functional central limit theorem for negatively associated random variables under some conditions without stationarity is proved.
      
In this paper it is proved that the regular graphs under some conditions do have an ascending sub-graph decomposition.
      
更多          


A new method is proposed in this paper for the evaluation of the following three important kinds of three-center and four-center integrals needed in molecular quantum mechanics: (1) (2) (3) Obviously, integral (2) is a special case of integral (3), so we need only to evaluate the first and the third. The following equations have been obtained for the evaluation of the above-mentioned two kinds of integrals (4) (5) where (6) (7) (8) (9) R_0 in equation (4) is the distance of point a apart from the origin located...

A new method is proposed in this paper for the evaluation of the following three important kinds of three-center and four-center integrals needed in molecular quantum mechanics: (1) (2) (3) Obviously, integral (2) is a special case of integral (3), so we need only to evaluate the first and the third. The following equations have been obtained for the evaluation of the above-mentioned two kinds of integrals (4) (5) where (6) (7) (8) (9) R_0 in equation (4) is the distance of point a apart from the origin located in bc line, while that in equation (5) is the distance between the two chosen origins separately located in ab and cd lines. θ_0 is the angle made byand, and θ_(10), θ_(20) and θ_(12) are respectively the angles made by and,and,and, The fourth term of equation (5) is, in general, negligible except in the case of R_0, which is less than two Bohr units. We propose two methods for the evaluation of and : the first one is to choose the origin at the end-point of the bond and evaluate the integral strictly inside and outside the sphere of radius, while the second one is to choose the origin at the mid-point of the bond and evaluate its value inside and outside the ellipsoid passing through the end-point of. The calculation involved in the second method is quite simple and, of course, a small error is introduced in changing the region of integration from the sphere to the ellipsoid, but it is quite negligible in comparison with the result of our first method. Equation (4) is exact in all cases, while equation (5) is exact in many cases but also involves certain errors in some other cases. From our actual calculations, we draw the conclusion that equation (5) is almost exact in the evaluation of integrals L_(aa, bc) and L_(ab, cd) and that certain error is involved in the evaluation of integral L_(ab, bc), but the error introduced does not exceed ten per cent.

在本篇文章中,我們建議了一種新方法來計算量子力學中的三中心和四中心積分;這方法此以往的好,因為計算簡單,應用廣闊,結果也比較可靠。我們用來計算三中心吸引能的公式[方程(5)]是在任何情况下都是正確的,而用來計算三中心和四中心的排斥能積分公式[方程(18)]在某些情况下是正確的,在另一些情况却能引進一些誤差。在計算非相隣鍵的積分時引進的誤差很小,可以忽略不計;在計算相隣鍵的積分時引進的誤差此較大,但不超過百分之十。我們建議兩種計算A_u和B_u的方法,一種方法是以鍵的一個端點爲原點,嚴格按照球內外的區域積分;另一種方法是以鍵的中點為原點,按照橢圓體的內外區域積分。前一種方法理論上嚴密,然而後一種方法計算簡單,收斂性快,引進的誤差也不大;尤其在計算相隣鍵的三中心排斥能的積分時,似乎後一方法得到的結果還比前一方法好。在本文中,為了容易說明起見,常常引用吸引能和排斥能這兩個名詞,實際我們的方法,是用來計算下列三類積分:它們不僅包括吸引能和排斥能積分,也把交换積分包括在內,甚至可以在更廣泛的意義上看待上列積分。若σ_1,σ_2也是Φ_1和Φ_2的函數時,仍可以用我們的一般展開理論處理,不過要此本文複雜。

Unlike amines and alcohols reacting with acylisothiocyanates to form acylthioureas andacylthiourethans respectively as the only products,phenols reacted,in general,with the samereagents in two different ways,namely:(Ⅰ)Acylation:(Ⅱ) Addition:where R=C_6H_5,p-BrC_6H_4,and R'=CH_3,H,Cl,COOH,NO_2,etc.In some cases,the former reaction occurred predominately.With phenols containinsproton-repelling groups,such as o-nitrophenol,p-nitrophenol,2,4-dinitrophenol,picric acid,etc.,which react with arylisocyanates with difficulty,however,addition...

Unlike amines and alcohols reacting with acylisothiocyanates to form acylthioureas andacylthiourethans respectively as the only products,phenols reacted,in general,with the samereagents in two different ways,namely:(Ⅰ)Acylation:(Ⅱ) Addition:where R=C_6H_5,p-BrC_6H_4,and R'=CH_3,H,Cl,COOH,NO_2,etc.In some cases,the former reaction occurred predominately.With phenols containinsproton-repelling groups,such as o-nitrophenol,p-nitrophenol,2,4-dinitrophenol,picric acid,etc.,which react with arylisocyanates with difficulty,however,addition reaction took place readilyand gave acylthiourethans in high yields.o-Aminophenol reacted with aroylisothiocyanates forming corresponding aroylthiourea insteadof urethan.In basic medium acetoacetic ester reacted with p-bromobenzoylisothiocyanate yielding anaddition compound,which showed no unsaturation.It was,therefore,suggested that theaddition took place between isothiocyanate residue and the active hydrogen of the keto formrather than the enol form of the ester.Malonic ester reacted with the reagent in the same fashion.

1. 芳酰异硫氰与酚类作用时,反应一般以两种类型进行,即酰化与加成。某些情况下酰化反应占优势。但是硝基酚能够顺利地与芳酰异硫氰起加成反应。所得到的酰氨基硫代甲酸酚酯均为有一定熔点的良好晶体。2. 鄰氨基酚与芳酰异硫氰作用时,由氨基起加成反应得到对应的芳酰基硫脲。3. 含活泼亚甲基的化合物,如乙酰乙酸乙酯及丙二酸二乙酯,与对溴苯甲酰异硫氰作用时,可以得到亚甲基上活泼氢原子与试剂起加成反应的产物。

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电动机和生产机械间的变速装置的传速比,直接影响到电力拖动装置的技术经济指标。正确地选择传速比及相应的电动机额定转速,是设计电力拖动装置的一个重要问题。 在本文中阐述了在几种主要情况下现有的选择最佳传速比的方法。作者对於某些情况提出了一些补充意见。 在四十多年以前就有一些学者开始研究本文中所讨论的问题。L.A.尤曼斯基根据生产机械起动到给定的速度,能保证起动时间最短的条件出发,导出了计算传速比的公式。А.И.采利柯夫也导出了同样的公式,但是他是根据在给定的时间内,使生产机械的工作轴能转过最多转数的条件出发。 H.A.齐申科对于生产机械以一定的速度旋转,忽略负载转矩,保证起动制动时间最短的情况,导出了计算公式。而Р.Л.阿朗诺夫的公式则是考虑负载转矩的影响,而假定起动转矩同制动转矩相等。 本文作者在同样的条件下,既考虑负载转矩,又考虑起动转矩与制动转矩的不等,得出如下的方程式: GD_δ~2MтMпK~4+2GD_δ~2Mм(Mп-Mт)K~3-(GDм~2MтMп+3GD_δ~2Mм~2)K~2- -GDм~2Mм~2=0。上述的公式都可以看成是这个普遍方程式的特例。 这个方程式与А.И.采利柯夫和...

电动机和生产机械间的变速装置的传速比,直接影响到电力拖动装置的技术经济指标。正确地选择传速比及相应的电动机额定转速,是设计电力拖动装置的一个重要问题。 在本文中阐述了在几种主要情况下现有的选择最佳传速比的方法。作者对於某些情况提出了一些补充意见。 在四十多年以前就有一些学者开始研究本文中所讨论的问题。L.A.尤曼斯基根据生产机械起动到给定的速度,能保证起动时间最短的条件出发,导出了计算传速比的公式。А.И.采利柯夫也导出了同样的公式,但是他是根据在给定的时间内,使生产机械的工作轴能转过最多转数的条件出发。 H.A.齐申科对于生产机械以一定的速度旋转,忽略负载转矩,保证起动制动时间最短的情况,导出了计算公式。而Р.Л.阿朗诺夫的公式则是考虑负载转矩的影响,而假定起动转矩同制动转矩相等。 本文作者在同样的条件下,既考虑负载转矩,又考虑起动转矩与制动转矩的不等,得出如下的方程式: GD_δ~2MтMпK~4+2GD_δ~2Mм(Mп-Mт)K~3-(GDм~2MтMп+3GD_δ~2Mм~2)K~2- -GDм~2Mм~2=0。上述的公式都可以看成是这个普遍方程式的特例。 这个方程式与А.И.采利柯夫和Н.П.库尼茨基从另外的观点得出的方程式相同。他们的条件是机械移动行程不大,尚未达到稳态速度的未达稳态情况,?

 
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