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 distance 距离(22168)距(4621)
 距离
 Inverse Optimization Problems under Hamming Distance and Multicommodity Production and Distribution Problems 哈明距离下的逆优化问题及多物品的制造与分配问题 短句来源 Calculation for the Distance between two Points on Earth 大地上两点间距离的计算 短句来源 A COMPARATIVE STUDY BETWEEN GENETIC DISTANCE OF PARENTS AND COMBINING ABILITY OF THEIR F_1 HYBRIDS 作物亲本遗传距离及其F_1特殊配合力的比较研究 短句来源 The AppLication of X~2Distance Coefficient in the Method of Reduction of Dimensionnality through EXtreme Point Analgsis of High-Dimensioned Sample Points X~2距离系数在高维样品点的极点降维法中的运用 短句来源 Average Distance Constants of Some Compact Convex Spaces 某些凸紧空间的平均距离常数(英文) 短句来源 更多
 距
 Calculating the Belt Length or the Centre Distance of Belt Drives by Graphic Method 用线图法计算带长或传动中心距 短句来源 On the Point to Chord Distance Formula in a Circle and Its Applications 圆的点弦(切)距公式及其应用 短句来源 Inner Product Preserving Maps and Distance Preserving Maps on Hilbert Spaces Hilbert空间上的保内积映射和保距映射 短句来源 Distance and Place Value on Plane Region 平面域上的距和位值 短句来源 The Points on S(l~∞) Have One Distance to Translation Subspace of l~∞ S(l~∞)上距l~∞的平移子空间距离为1的点 短句来源 更多
 “distance”译为未确定词的双语例句
 OPTIMUM ESTIMATION FOR ACCURACY OF DISTANCE BETWEEN MOUNTING HOLES FOR AIRCRAFT EQUIPMENT BY KALMAN FILTERING THEORY 用Kalman滤波理论对飞机成品安装孔距精度做最优估计 短句来源 METRIZABLE CONDITIONS OF 2-PM SPACE,ITS DISTANCE FUNCTION AND PSEUDO DISTANCE FUNCTION 2—PM空间的可度量化条件及度量函数、伪度量函数 短句来源 THE POSSIBILITY OF 15″ JUMP-ROPE EXERCISE TO ENHANCE THE SPEED OF SHORT DISTANCE RACES 15跳绳对提高短跑速度的可能性 短句来源 NON-UNIFORM BERRY-ESSEN DISTANCE FOR SUMMABILITY METHODS. WITH APPLICATIONS 关于Summability Methods的非一致Berry-Essen界及其对重对数律收敛速度、小参数问题的应用 短句来源 APPROXIMATE ε-EQUIVALENT DISTANCE OPERATOR IN B [L', C [a,b]] B［l＇，C［a、b］］中的一类可逼ε－等距算子 短句来源 更多

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 distance
 It is defined thanks to a natural distance on the space of compact open subgroups of G. Let S be a band in Z2 bordered by two parallel lines that are of equal distance to the origin. However, the Mattila integral, associated with the Falconer distance problem for these measures is unbounded in the range $0 >amp;lt; s >amp;lt; \frac{d^2}{2d-1}$. They are Polish vector spaces for a natural distance. Let M be a 3 X 3 matrix and d(M) is the distance to the diagonal algebra. 更多
 The gravitational field and the motion of matter in the universe are investigated according to Einstein's field equations and his dynamical equations of motion. In a spatially isotropic and homogeneous space-time continuum it can be shown that up to about 2x10~8 l.y. the following relation holds between spectrum displacement δλ from distant spiral nebulae and their observa-tionally defined distance d,where A is Einstein's cosmological constant. The first term on the right hand side is essentially Hubble... The gravitational field and the motion of matter in the universe are investigated according to Einstein's field equations and his dynamical equations of motion. In a spatially isotropic and homogeneous space-time continuum it can be shown that up to about 2x10~8 l.y. the following relation holds between spectrum displacement δλ from distant spiral nebulae and their observa-tionally defined distance d,where A is Einstein's cosmological constant. The first term on the right hand side is essentially Hubble and Humason's velocity-distance relation. The second part is a correction which amounts to 11.5% for d2x10~8 l.y. and hence lies within observational error of the present Mt. Wilson 100-inch telescope. The theory shows that both Milne's recent Newtonian theory of the expanding universe and Lemaitre's interpretation of tha velocity-distance are first order approximations and are valid only within 2xl08 l,y. from our galaxy. The calculation for the phenomsna of nebular recession beyond 2xl08 l.y. to be observed by the 200-inch telescope now under construction according to the present scheme will be presented in the near future. 本文用安因斯坦力学及引力论解释宇宙之膨胀现象。从本文方程式中可证明雷猛德及米恒诸氏之学说皆为本文之近似值,而本文理论之能成立与否须恃200英寸反光镜完成后之观测云。 Upper air visibility and vertical visibility are different from horizontal far distance visibility. They have special signifigance in aviation.In this paper the atmospheric extinction coefficieat, the upper air visibility and vertical visibility are calculated by observing the polit balloons and radiosonde balloons.The principle of visibility instrument is used that is making use of optical wedge, photoelectric cell etc, to carry out the measurement. Foitzik 1947, Duntley 1948, and some other scientists... Upper air visibility and vertical visibility are different from horizontal far distance visibility. They have special signifigance in aviation.In this paper the atmospheric extinction coefficieat, the upper air visibility and vertical visibility are calculated by observing the polit balloons and radiosonde balloons.The principle of visibility instrument is used that is making use of optical wedge, photoelectric cell etc, to carry out the measurement. Foitzik 1947, Duntley 1948, and some other scientists have disscnsed the problem of vertical visibility. Their method is to carry out the calculation with given atmospheric extinction coefficient, while in practical application this calculation is the second step, what we need to find out first is the atmospheric extinction coefficient. In Duntley's paper, he assumes that within the limit of discussion, the intensity of sky light is constant. But this can only be true within a very thin layer of atmosphere, as to the atmosphere which is kilometres thick, it has to consider the attenuation of light by the atmosphere. Furthermore he assumes that the anisotropy of atmosphere's scattering function is invariant with height and then it is considered as a molecular atmosphere. But this has been proved by several authors in theory and in experiment to be not true, especially in the lower atmosphere. Certainly, Duntley's calculation is not accurate and is limited in application.A correction has been given to the above mentioned assumptions in this paper. Finally, the problem of light of source visibility in night and some other materials on observation are being discussed. 高空能见度,垂直能见度是和地平远程能见度不相同的。在航空方向,高空能见度与垂直能见度具有着特殊的意义。 本文藉助于测风气球及雷送气球的观测,计算大气削弱系数,从而计算高空能见度与垂直能见度。 我们利用莎罗诺夫能见度仪器的原理:利用光楔,光电池等进行测量。 It has long been realised that for laminar flow through a circuclar pipe, the Poiseulle's velocity distribution exits only at a sufficient distance downstream from the entrance to the pipe. For a well-rounded entrance, the velocily distribution at the entrance is approximately uniform, it then varies gradually with the distance from the entrance until the parabolic distribution is fully developed. The distance from the entrance required for practically complete transition has been calculated... It has long been realised that for laminar flow through a circuclar pipe, the Poiseulle's velocity distribution exits only at a sufficient distance downstream from the entrance to the pipe. For a well-rounded entrance, the velocily distribution at the entrance is approximately uniform, it then varies gradually with the distance from the entrance until the parabolic distribution is fully developed. The distance from the entrance required for practically complete transition has been calculated by Boussiuesq and olso by Schiller, and formulas for calculating tle transition length have been proposed. For laminar flow between parallel plates, however, no information for the length of transition appears to be available. An attempt is thus made, in this paper, to calculate this lenqth by applying Schiller's theory; and the result obtained is given by L=0.0259bR in which L is the transition length, b is half the distance between the plates and R is the Reynolds number. 我們很早就知道流體在圓管中作層流運動時,泊西里(Poiseulle)的流速分佈只是在距進口處相當長的一段距離處才能實現。如管子進口是圓滑的,則在進口處斷面上的流速是均匀分佈的,此後流速分佈即逐漸轉變直至抛物線形的流速分佈完全形成爲止。由進口處至完全轉化成抛物線形流速分佈所需的距離曾先後經鮑辛尼斯克(Boussinesq)和錫拉(Schiller)進行過研究,他們求得了計算此轉化長度的公式。但是對於在二平行平板間的層流運動,其轉化長度的計算尚無公式可資利用。爲此本文應用錫拉理論對此進行了計算,求得了此轉化長度的公式爲L=0.0259bR,式中,L爲轉化長度,R爲雷諾數,b爲二平板間的距離之半。 << 更多相关文摘
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