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nonuniform     
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  非均匀
     A nonuniform quantization index modulation watermarking algorithm based on image wavelet transform was presented to improve the robustness and invisibility of digital watermark.
     为了提高数字水印的稳健性与不可见性,将图像小波变换与量化索引调制算法相结合,提出了一种基于小波变换的非均匀量化索引调制数字水印算法。
短句来源
     Nonuniform mesh grid algorithm for Lattice Boltzmann method based on interpolation
     基于插值的Lattice Boltzmann方法非均匀网格算法
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     Laboratory study of casing strength under nonuniform load
     非均匀外载作用下油井套管强度特性的实验研究
短句来源
     Free vibration of rectangular Mindlin plate with nonuniform curve supports
     非均匀曲线支承矩形Mindlin板的自由振动
短句来源
     Results In the phantom images,the 153 Gd nonuniform attenuation correction offered much better quality of the images by commenting the images with visual observation and the ration of the ROI.
     结果 心肌断层模型153 Gd非均匀衰减校正图像与未校正图像的比较分别用目测法和比值法 ,结果表明 :校正图像质量比未校正图像好 ,更能反映真实情况。
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  不均匀
     Effects of Nonuniform Heavy Doping in the Base on Base Transit Time of Si/SiGe/Si HBT’s
     基区不均匀重掺杂对Si/SiGe/SiHBT基区渡越时间的影响
短句来源
     Clinical observation of a case with multi-part radiation injury caused by nonuniform ~(192)Ir external irradiation
     一例~(192)Ir不均匀外照射多部位放射损伤的临床观察
短句来源
     The research proves that sulfur (S) is main impurity element causing grain boundary weakening and creep embritt1ement of domestic steel T91/P91, and that the high content of residual elements such as aluminum (Al) in Shanghai made T9l and titanium (Ti) in Sichuan made T91 causes nonuniform distribution of diffused phase Nb, V(C,N) and reduction of volumetric ratio in steel.
     研究证明:硫(S)是引起国产T91/P91钢晶界弱化和蠕变脆化的主要杂质元素; 沪产T91钢中的铝(A1)和川产T91钢中的钛(Ti)等残余元素含量过高造成T91钢中弥散相NbV(C,N)分布不均匀和在钢中体积份额的减少。
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     (2) a nonuniform thickness distribution within 0~15°, a uniform thickness distribution within 15°~180° away from the weld line are observed in the FHB of seamed tubes, which is similar to that observed in the FHB of seamless tube with the same condition;
     无缝管胀形后壁厚沿环向分布均匀,而有缝管胀形后,距焊缝对称中心0~15°之间的壁厚沿环向分布不均匀,距焊缝对称中心15°~180°之间的壁厚基本上呈均匀分布,且壁厚值和同种材料的无缝管在相同条件下胀形的壁厚值接近;
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     In petroleum exploration,conventional radio positioning system is difficult to meet working requirement,due to its positional accuracy nonuniform in whole measuring erea.
     在石油勘探中 ,传统的无线电定位系统由于在整个测区内定位精度不均匀 ,已难以满足工作需要 ,因此采用GPS全球卫星定位系统进行准确可靠的定位已成为勘探的必要条件。
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更多       
  非均匀
     A nonuniform quantization index modulation watermarking algorithm based on image wavelet transform was presented to improve the robustness and invisibility of digital watermark.
     为了提高数字水印的稳健性与不可见性,将图像小波变换与量化索引调制算法相结合,提出了一种基于小波变换的非均匀量化索引调制数字水印算法。
短句来源
     Nonuniform mesh grid algorithm for Lattice Boltzmann method based on interpolation
     基于插值的Lattice Boltzmann方法非均匀网格算法
短句来源
     Laboratory study of casing strength under nonuniform load
     非均匀外载作用下油井套管强度特性的实验研究
短句来源
     Free vibration of rectangular Mindlin plate with nonuniform curve supports
     非均匀曲线支承矩形Mindlin板的自由振动
短句来源
     Results In the phantom images,the 153 Gd nonuniform attenuation correction offered much better quality of the images by commenting the images with visual observation and the ration of the ROI.
     结果 心肌断层模型153 Gd非均匀衰减校正图像与未校正图像的比较分别用目测法和比值法 ,结果表明 :校正图像质量比未校正图像好 ,更能反映真实情况。
短句来源
更多       
  非均匀业务
     In this paper,the priority control method,called "Hot Spot Push Out" (HSPO),is used for analyzing the performance of shared buffer ATM switches under a non uniform traffic.
     本文对非均匀业务下共享存储器ATM交换机采用热点推出 (HSPO)优先级控制策略方案建立了系统模型 .
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      nonuniform
    In this paper, A new finite difference scheme is proposed on nonuniform rectangular partition for the thermistor problem.
          
    Boundary stabilization of nonuniform Timoshenko beam
          
    In this paper, the boundary stabilization of the Timoshenko equation of a nonuniform beam, with clamped boundary condition at one end and with bending moment and shear force controls at the other end, is considered.
          
    Exponential stabilization of nonuniform Timoshenko beam with locally distributed feedbacks
          
    The stabilization of the Timoshenko equation of a nonuniform beam with locally distributed feedbacks is considered.
          
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    The method of complementary I_0/I diagram for simplifying the computations of non-uniform beam constants is presented in this paper. The so-called "complementary I_0/I diagram" is the remaining I_0/I diagram of the haunched or de-haunched (or tapered) parts at the two ends of a beam after the I_0/I diagram of a non-uniform beam has been subtracted from the I_0/I = 1 diagram of a uniform beam.In the method of I_0/I diagram presented previously by the second author, the various momental areas have to be computed...

    The method of complementary I_0/I diagram for simplifying the computations of non-uniform beam constants is presented in this paper. The so-called "complementary I_0/I diagram" is the remaining I_0/I diagram of the haunched or de-haunched (or tapered) parts at the two ends of a beam after the I_0/I diagram of a non-uniform beam has been subtracted from the I_0/I = 1 diagram of a uniform beam.In the method of I_0/I diagram presented previously by the second author, the various momental areas have to be computed for the entire length of a beam; in the method of complementary I_0/I diagram, the various momental areas need be computed for the lengths of the non-uniform sections at the two ends of the beam only. Hence the latter method is somewhat simpler than the former and may be considered as its improvement.The angle-change constants are the fundamental constants of a nonuniform beam, and only the coefficients of the angle-change constants need be computed. As any non-uniform beam may be considered as a uniform beam haunched or de-haunched or tapered at its one or both ends, the various anglechange coefficients φ may be computed separately in three distinct parts, viz., of a uniform beam, and φ~a and φ~b of the haunches at its two ends a and b, and then summed up as shown by the following general equation:φ=φ~a-φ~b (A) The values φ~a and φ~b are positive for haunched beams and negative for dehaunched or tapered beams, and either of them is zero for the end which is neither haunched nor de-haunched. To simplify the computations of the values of φ~a and φ~b, the complementary I_0/I diagram at each end of a beam is substituted by a cubic parabola passing through its two ends and the two intermediate points of the abscissas equal to 0.3 and 0.7 of its length. Then the value of φ~a or φ~b is computed with an error of usually less than 1% by the following formula:φ~a or φ~b = K_(0y0)+K_(3y3)+K_(7y7), (B) wherein y0, y3 and y7 are respectively the ordinates at the abscissa equal to 0, 0.3, and 0.7 of the length of the diagram, and the three corresponding values K_0, K_3 and K_7 are to be found from the previously computed tables.A set of the tables of K-values for calculating the values of φ~a and φ~b of the shape angle-changes and the load angle-changes under various loading conditions may be easily computed, which evidently has the following advantages: (1) As indicated by formulas (A) and (B), the computations of φ~a, φ~b and φ with K-values known are very simple; (2) the approximation of the results obtained is very close; (3) A single set of such K-value of the tables is applicable to non-uniform beams of any shape, any make-up, and any crosssection; and (4) as the K-values are by far easier to compute than any other constants, a comprehensive set of the tables of K-values with close intervals and including many loading conditions may be easily computed.Besides, by means of formulas (A), existing tables of constants such as A. Strassner's for beams haunched at one end only may be utilized to compute the shape and load constants for asymmetrical beams with entirely different haunches at both ends.Finally, five simple but typical examples are worked out first by the approximate method and then checked by some precise method in order to show that the approximation is usually extremely close.

    本文叙述一种I_0/I余圖法,以簡化变梁常数的計算。所謂I_0/I余圖,即自等截面梁的I_0/I=1圖減去变梁的I_0/I圖后所剩余的兩端梁腋的I_0/I圖。 於本文第二著者前此所建議的I_0/I圖法中,必須計算变梁全長的I_0/I圖的各次矩图面积,於I_0/I余圖法中,則只須計算变梁兩端梁腋的I_0/I余圖的各項积分值。故后法显此前法为簡單,亦可视作系前法的进一步的改善。 角变常数为变梁的基本常数,而所須計算者只是各項角变常数的系数φ,簡称为“角变系数”。任一形式的变梁均可视作一端或兩端的加腋梁或減腋梁。採用I_0/I余圖法,則变梁的各項角变系数φ的計算可分开为等截面梁的φ及其a与b兩端梁腋的φ~a与φ~b三部分而后綜合之,以公式表之,即於加腋梁φ~a与φ~b为正号;於減腋梁φ~a与φ~b为負号,於无梁腋之端則其φ~a或φ~b之值为霉。 計算梁腋的φa或φ~b值时,可用一根三次拋物線以代替I_0/I余圖而計算其各項积分的近似值。由是可得其中y_0,y_3及y_7为a或b端I_0/I余圖的三个豎距。如按变梁的形角变系数及其在各种荷載下的载角变系数將各項K值列成表格,則此項表格显有下列优点:(一)应用步驟簡單,...

    本文叙述一种I_0/I余圖法,以簡化变梁常数的計算。所謂I_0/I余圖,即自等截面梁的I_0/I=1圖減去变梁的I_0/I圖后所剩余的兩端梁腋的I_0/I圖。 於本文第二著者前此所建議的I_0/I圖法中,必須計算变梁全長的I_0/I圖的各次矩图面积,於I_0/I余圖法中,則只須計算变梁兩端梁腋的I_0/I余圖的各項积分值。故后法显此前法为簡單,亦可视作系前法的进一步的改善。 角变常数为变梁的基本常数,而所須計算者只是各項角变常数的系数φ,簡称为“角变系数”。任一形式的变梁均可视作一端或兩端的加腋梁或減腋梁。採用I_0/I余圖法,則变梁的各項角变系数φ的計算可分开为等截面梁的φ及其a与b兩端梁腋的φ~a与φ~b三部分而后綜合之,以公式表之,即於加腋梁φ~a与φ~b为正号;於減腋梁φ~a与φ~b为負号,於无梁腋之端則其φ~a或φ~b之值为霉。 計算梁腋的φa或φ~b值时,可用一根三次拋物線以代替I_0/I余圖而計算其各項积分的近似值。由是可得其中y_0,y_3及y_7为a或b端I_0/I余圖的三个豎距。如按变梁的形角变系数及其在各种荷載下的载角变系数將各項K值列成表格,則此項表格显有下列优点:(一)应用步驟簡單,只有几个簡單的乘法与加減法;(二)所得結果的近似程度頗高,差誤一般不超过1%;(三)应用范圍广泛,只一套K值表可用於任何截面及?

    The analysis of stepped beams on spring foundation is a problem of practical importance. It is shown in the paper that this problem is similar to that of a continuous curved beam on rigid supports and can be most easily solved by method of special slope deflection equations. The formulas for computing load and shape constants being necessarily long, a number of tables of useful functions have been prepared to aid in a quick analysis and a typical example is given. The theory and functions presented in the paper...

    The analysis of stepped beams on spring foundation is a problem of practical importance. It is shown in the paper that this problem is similar to that of a continuous curved beam on rigid supports and can be most easily solved by method of special slope deflection equations. The formulas for computing load and shape constants being necessarily long, a number of tables of useful functions have been prepared to aid in a quick analysis and a typical example is given. The theory and functions presented in the paper are also applicable in analyzing other problems with same mathematical nature, such as the problem of axisymmetrical bending of cylinders with nonuniform wall thickness.

    本文討論彈性地基上的阶形梁的計算問題。应用結構力学上“桿件常数”的观念,这个問题可以簡捷地获得解决。文中除举例說明計算步驟外,並供給必要的函数表,使这些常数能够迅速求出。这些函数同样可以用来解决数学上类似的問題,例如变截面圓筒的軸对称受弯问題。

    Circular plates with ring-stiffeners have been used frequently in practice. especially in water supply and sewage engineering st?ctures. Practical experiences point out thatthe use of ring-stiffened circular plate of non-uniform cross section can save more ma-terials than that of uniform section. As yet, however, the analytical procedure becomestoo complex to the designer. In this article the author proposes a method to adopt the so called "No Shear Mo-ment Distribution" to the analysis of ring-stiffened, non-uniform...

    Circular plates with ring-stiffeners have been used frequently in practice. especially in water supply and sewage engineering st?ctures. Practical experiences point out thatthe use of ring-stiffened circular plate of non-uniform cross section can save more ma-terials than that of uniform section. As yet, however, the analytical procedure becomestoo complex to the designer. In this article the author proposes a method to adopt the so called "No Shear Mo-ment Distribution" to the analysis of ring-stiffened, non-uniform circular plates. Usingthis new method, the task required to analyze a circular plate with n stiffening ribs isjust the same as to that of a continuous beam having n+1 spans, Solution of differen-tial equations or simultaneous equations are completely avoided. By suitable transformation of the equations given in this paper, the method can alsobe applied to metallic circular plates of nonuniform cross section with ring-stiffeners,o? to the analysis of rotating disks.

    具有加劝环肋的圆薄板,在实际工程中常常遇到,特别在给水排水工程结构中用得最多。实际经验指出:在某些情况下,应用变截面的圆板,可以更节省用料,但是这类结构物的分析工作,却也随之变为异常复杂难解了。 本文提出,如何应用结构力学中,近年来获得新发展的一种“无剪力力矩分配法”,来分析具有加劲环肋变截面圆薄板,使带有几个加肋的变截面圆板分析工作量,与一根具有n+1个跨度的连续梁一样简单,完全免去了解微分方程或联立方程式的麻烦。 若将本文各公式略加修改,则完全适用于机械另件设计中的变截面金属圆薄板与旋转圆片应力分析。

     
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