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准确地计算
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  accurately calculate
     The results indicate: for cyclone separator with the diameter of 305 mm, the calculated separation efficiency from Barth empirical model is in good agreement with the experimental data, and for cyclone separator with diameter of 152 mm, the Iozia & Leith empirical model can accurately calculate its separation efficiency.
     结果表明,Barth经验公式在计算直径为305mm的Stairmand旋风分离器时的分级效率与实验数据吻合较好; 而Iozia&Leith经验公式能准确地计算直径为152mm的Stairmand旋风分离器的分级效率;
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     By using this system, the PD of transformer windings was measured. Experimental results show that the system can effectively measure the time and the amplitude of the high-frequency (adjustable center frequency between 400~800 MHz with minimum steps of 5 MHz) and narrowband (10, 20, 40 or 80MHz) signals emitted from PD, and accurately calculate phase resolved PD patterns and statistical operators.
     在实验室中检测了变压器绕组的局部放电,结果表明:该系统可以有效地提取中心频率在400~800MHz之间(最小步长5MHz)、带宽为10、20、40或80MHz的特高频局部放电信号,能准确地计算放电相关参数;
短句来源
     For converted wave stacking and trace selection of common reflection point gathering, it is required to accurately calculate the location of conversion points.
     转换波共转换点的叠加和道集选取都需要准确地计算转换点的位置.
短句来源
     Simulation results demonstrate that the proposed method can accurately calculate the packet delay in session setup.
     仿真结果表明,提出的方法可以准确地计算连接建立条件下的分组延时.
短句来源
     Since the overall failure of a ship hull is normally governed by buckling and plastic collapse of the deck, bottom or sometimes the side shell stiffened panels, it is of crucial importance to accurately calculate the ultimate strength of stiffened panels in deck, bottom and side shell for more advanced structure design of ship structures.
     由于船体梁的总体破坏通常由甲板、底板或者舷侧加筋板的屈曲或塑性破坏控制,因此在船舶结构设计中准确地计算甲板、底板或舷侧加筋板的极限强度就显得尤为重要。
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  accurate calculation
     For accurate calculation of the consolidation settlement, it is suggested that the loading time of each stage should be reduced, i.e. 1 hour for clay and silty clay with a consolidation coefficient larger than 4×10~(-4)? cm~2/s, and 4 hours for clay with a consolidation coefficient in the range of 1×10~(-4)? cm~2/s ~ 4×10~(-4)?
     为了较准确地计算固结沉降量,建议将固结试验每级荷载加压时间由土工试验规范中规定的24h缩短成:固结系数大于4×10-4cm2/s的粘土和粉质粘土为1h,固结系数在1×10-4~4×10-4cm2/s范围内的粘土为4h.
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     This model can be used in the accurate calculation of wear rate of screw-nut pair and worm-worm wheel pair,and can be applied quite conveniently to tribology programming as well.
     该模型可用于准确地计算丝杆螺母副和蜗轮蜗杆副的磨损率 ,可十分方便地用于摩擦学程序设计。
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     The accurate calculation and determination was thought as the base which made the good nutrition scheme of the ruminant, it was also the important basis which fixed the ruminant's supplementary fodder.
     准确地计算和测定反刍动物的采食量,是制定反刍动物的良好的营养方案的基础;
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     With the expanding of the scale of power system, prompt and accurate calculation of the load flow equations is more and more important for the simultaneous control of power system.
     随着电力系统网络规模的日益加大,快速准确地计算电力系统潮流方程对实现电力系统实时控制越来越重要。
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     The representative water level of reservoirs deduced by the static reservoir capacity curve was used for accurate calculation of the dynamic capacity of reservoirs.
     利用河道型水库的实际库容(动库容)按静库容曲线反推求得水库的代表水位,根据代表水位准确地计算出水库的动库容.
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  calculated accurately
     The results show that PS is sulfonated successfully, and the degree of sulfonation is calculated accurately by u-sing titration and 1 H-NMR.
     结果表明PS被成功地磺化,同时,使用电导滴定和1H-NMR两种方法准确地计算了磺化度。
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     In addition, the FORTRAN calculation program of this method is compiled in this paper, by which the low cycle fatigue life of bellows expansion joints can be calculated accurately.
     本文同时编写了该方法的Fortran计算程序,利用该程序可以比较准确地计算出膨胀节的低循环疲劳寿命。
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     Heat generated in the rolling deformation zone is calculated accurately, on the basis of which new calculating model of work roll temperature is established through thermal equilibrium of strip mill and rolling stock.
     准确地计算轧制变形区的发热量 ,通过联立工作辊与轧件的热平衡方程 ,获得工作辊温度计算新模型 ;
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     Through the ultimate proven reserves forecast for the developed oil -gas accumulation zones and the estimated result of resource quality, the resources conversion rate can be calculated accurately, and it can predict the exploration potential of the analo- gous structural units.
     通过对已开发油气聚集带最终探明储量的预测,结合其资源量的评价结果,可以比较准确地计算出资源转换率,用以预测相类似的构造单元的勘探潜力。
短句来源
     In the paper, friction heat is calculated accurately by preparatory displacement slip friction model, computational formula of cold rolled thin plate's temperature increment is derived by means of taking plastic deformation heat and friction heat into account synthetically.
     采用包含滑动摩擦和粘着摩擦在内的预位移 滑动摩擦模型较准确地计算了轧制区摩擦热 ,并综合考虑轧件塑性变形热 ,推导了冷轧薄板温升计算公式。
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  “准确地计算”译为未确定词的双语例句
     The stress relaxation characteristic of 25Cr2Mo1V and 20Cr1Mo1VNbTiB steels for the studs is analyzed, and the method with which the allowable stress is calculated correctly is introduced in detail.
     本文分析了25Cr2Mo1V和20Cr1Mo1VNbTiB两种螺栓钢的应力松弛特性,同时详细地介绍了准确地计算螺栓材料许用应力的方法.
短句来源
     In the study of maximum absorption wavelength, with the optimized geometry obtained by B3LYP/6-311G*, the visible absorption wavelength of azobenzene compounds, pyridone azo compounds, amino pyrimidine compounds and thiazole heterocyclic azo compounds are calculated by TD-DFT method and ZINDO/S method.
     在最大可见吸收波长的研究中,对于偶氮苯类化合物、吡啶酮偶氮类化合物、氨基嘧啶类化合物和噻唑杂环偶氮类化合物,采用B3LYP/6-311G~*方法对分子构型进行优化后,用TD-DFT法和ZINDO/S法都可以较准确地计算它们的最大可见吸收波长。
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     A new free wake method is developed to calculate the convergent wake structure and blade aerodynamic load distribution.
     发展了一种新的自由涡尾迹结构计算方法,该方法能快速得到收敛的尾迹结构,能比较准确地计算桨叶载荷分布。
短句来源
     Result shows that the method has higher accuracy for calculating formation pore pressure of the carbonate formation.
     地层压力体系包括上覆岩层压力、地层孔隙压力、地层破裂压力和坍塌压力,准确地计算地层孔隙压力是预测地层坍塌压力和破裂压力的前提。
短句来源
     The reflection spectrum of LiNbO3 in the range of 80cm-1-2800 cm-1 is measured by means of a 170SX Fourier transformation infrared spectrometer.
     我们用170SX傅里叶变换红外光谱仪,测量了LiNbO_3在30cm~(-1)~2800cm~(-1)波段内的反射光谱。 应用Kramers-Kronig关系的积分形式,快速而准确地计算出LiNbO_3在同一波段内的各种光学常数的谱图。
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  accurately calculate
Incorporation of a simple method for estimating initial K-values in the present algorithm allows this algorithm to more easily and accurately calculate the composition of each phase in vapor-liquid-liquid equilibrium.
      
It is a key problem to accurately calculate beam spots' center of measuring the warp by using a collimated laser.
      
From the synthesis of the results, a general correlation has been obtained permitting to accurately calculate this transfer coefficient.
      
The ability to accurately calculate protonation states in the form of pKas is, therefore, desirable.
      
It is then shown that the characterized aberrations can be used to accurately calculate the electromagnetic field at the focus using the Stratton-Chu vector diffraction theory.
      
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  accurate calculation
Hydrogen atom in strong magnetic field: A high accurate calculation in spheroidal coordinates
      
The main thrust is a more accurate calculation of transport coefficients and an investigation of their effect on profiles of the gasdynamic parameters.
      
A simple expression that allows accurate calculation of physicochemical properties of organic compounds like RX (R is an unbranched alkyl substituent CnH2n+1 and X is a functional group) was proposed.
      
As a result of testing the calculation schemes, the optimum algorithms are found and the conditions are determined under which highly accurate calculation results are attained.
      
It is shown that none of the approaches allows accurate calculation of the induction distribution in matter after pole magnetization.
      
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  calculated accurately
We have tested three deconvolution algorithms so that the concentration of sugars in samples of kiwi juice can be calculated accurately.
      
The energy for two excitons is calculated accurately as a function of their mean distance in the case of a heavy hole mass by using an integral expansion method of molecular physics.
      
The results show that the excitation energies of the ground state multiplets can be calculated accurately using a small orbital set but the higher levels need larger orbital sets.
      
Low lying excited state energies were calculated accurately using a single co-detor wavefunction and the predicted electronic transitions were associated with the previously reported experimental UV spectrum.
      
Patients with high background activity showed overestimation of LVEF, however, by using a formula that was derived from the linear regression the LVEF could be calculated accurately in most cases.
      
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在模型试验实践中,发现满流输水道自由出流时,出口尾段压力分布不循一般规律,顶部发生大片负压。负压问题在大直径输水道中影响工程安全;对低水头大隧洞,它还涉及有效水头的准确计算;此外,管道出口段的水力因素变化规律,迄今仍是管道水力学中的一个空白点。本文便是针对这些问题所作系统试验研究的一个综合报导。试验主要在15公分圆管中进行。试验成果,并在三种不同管径不同材料的圆管中进行校核。试验中取水流傅氏数和出水条件作为主要变量;着重研究了不同出口边界条件对出口断面压力分布和出口段压坡的影响;对有效水头计算方法、管顶负压消除措施,提供了具体建议。文中并对自由出水的出口段压力分布作了初步理论分析,计算结果与实测资料颇称吻合。

In this paper, the author has improved the approximate solutions for associated Legendre's function. When these improved approximate expressions for associated Legendre's function are used in studying the frequencies of free vibrations of spherical shell, a more rigorous theory for calculations of frequencies has been suggested. On the basis of authes's rigorous theory, the theory of shallow spherical shells and spherical shells withoot bending is established. Various computations have been performed and an...

In this paper, the author has improved the approximate solutions for associated Legendre's function. When these improved approximate expressions for associated Legendre's function are used in studying the frequencies of free vibrations of spherical shell, a more rigorous theory for calculations of frequencies has been suggested. On the basis of authes's rigorous theory, the theory of shallow spherical shells and spherical shells withoot bending is established. Various computations have been performed and an approximate formula is suggested for determining the frequencies of vibrations of spherical shells.

本文改进了Legendre函数的近似表达式,作者利用本文改进的Legendre函数的近似式来研究球壳的自由振动,提出了計算自振频率的较准确的計算理論。在准确理論基础上,文中获得球壳自振問題的扁壳理論和无矩理論,作者作了多种数字計算并提出了計算球壳自振頻率的实用近似公式。

To be able to locate the point of inception of air entrainment is of considerable significance in the design of ski-jump spillways for high dams, in that this is not only prerequisite to the theoretical analysis of jet diffusion in the air and the subsequent alleviation of erosion as the aerated jet dives to the bed, but also essential if the possible benefit of aeration in the reduction of concrete pitting is to be evaluated. Although past contributions to this problem are numerous, no method has yet been available...

To be able to locate the point of inception of air entrainment is of considerable significance in the design of ski-jump spillways for high dams, in that this is not only prerequisite to the theoretical analysis of jet diffusion in the air and the subsequent alleviation of erosion as the aerated jet dives to the bed, but also essential if the possible benefit of aeration in the reduction of concrete pitting is to be evaluated. Although past contributions to this problem are numerous, no method has yet been available to yield the correct prediction of the onset of aeration in or downstream of the curvilinear portion of the spillway which is known to take place much earlier than usual. Even for the straight portion of the spillway, calculated positions of aeration inception do not always match with the observed values (see table 1, and compare columns 4 to 7). In this paper is presented a rational and yet rather simple procedure with which one may treat the general problem of locating the position of aeration inception no matter if the spillway contains a curve or not. In the first place, the irrotational or "ambient" flow outside of the boundary layer is studied. In view of the fact that the flow over the spillway of a high dam is much smaller in extent laterally than longitudinally, an approximation similar to that used in the derivation of boundary layer equations from the Navier-Stokes equations is applied to the Euler equations. The resulting expressions indicate that the usual assumption of concentric streamlines is justifiable. The depth of flow is taken as that so calculated plus the displacement thickness of the boundary layer. Since on the plane of the complex potential, the flow over a spillway may be formulated as a simply-mixed boundaryvalue problem, Wood's exact method is applied to a numerical example with gravitational effect taken into consideration. The result of calculation indicates that both methods yield practically the same depth of flow. The inception of aeration is, as usual, assumed to occur as the boundary layer meets the free surface. Under the combined influence of gravity and boundary geometry, the flow over a dam is continuously accelerated or decelerated. In such case, boundary-layer computation by usual method is both involved and of doubtful accuracy. It is found, however, that in the case of flow over a spillway, the flow outside of the turbulent boundary layer conforms to a condition of self-preservation as proposed by Townsend. Since the Reynolds number for high dams may surely reach very high values, the turbulent boundary layer itself may be assumed to be approximately self-preserving. In short, this means that Townsend's theory of approximate self-preservation for boundary layers under the influence of longitudinal acceleration may be applied. This also means that the computation of boundary layer development may be much simplified. Based on an analysis of prototype data, it is found that in the present case involving air-entrainment inception, thickness of the boundary layer should be defined as that at which the mean velocity is within 0.1% of the velocity of flow outside the boundary layer. In the carrying out of the computations, boundary layer thickness at various sections are first estimated, then the irrotational flow outside the boundary layer is analysed by the simplified method to obtain the surface profile and the parameter "a" denoting the variation of velocity along the surface, and finally Townsend's theory of approximate self-preservation is applied to recompute the thickness of the boundary layer along the spillway. As any error made in the estimation of boundary-layer thickness has little effect on the computation of surface profile and hence on any subsequent computations, reasonably experienced computers should find it unnecessary to repeat the computations. Results of computations are found to be within 10% of the observed data obtained at two dams.

鉴于现有掺气发生点的计算方法误差可达观测值的70%以上,本文根据原型掺气发生点观测资料探讨较准确的计算方法,在无特殊干扰的条件下,掺气的发生取决于紊流边界层的发展.坝面边界层流动的特点是:雷诺数高(u_1x/,v在10~8至10~(10)之间),坝面粗糙,和水流先加速后减速因而纵向流速梯度对边界层发展的影响必须考虑.针对这些特点和坝面及陡槽高速水流具有自模性质,本文建议应用自模理论进行计算.计算的掺气点位置与实测位置比较误差减至10%左右,从而为掺气发生点或坝面紊流边界层的计算提供了较可靠的方法.

 
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