Water Resources Management - Considering the great importance of flood prediction, flood routing based on Shark Algorithm (SA) and Four-Parameter Nonlinear Muskingum (FPNM) has been proposed in the... 相似文献
Windows Mobile拥有微软的掌上版本操作系统,在与桌面PC和Office办公的兼容性方面具有先天的优势,用户越来越多。该文章将介绍基于Windows Mobile的多语种电子辞典的开发技术。始终考虑新疆维吾尔自治区的多民族特征,在双向汉维翻译,相关工具,界面的多语种化方面尽量给使用者提供方便的翻译功能。主要技术包括在Windows Mobile中维吾尔文的处理,界面的多语种化,UI元素,字体,图像对不同屏幕的自适应。 相似文献
Heat and mass transfer in unsteady non-coaxial rotating flow of viscous fluid over an infinite vertical disk is investigated. The motion in the fluid is induced due to two sources. Firstly, due to the buoyancy force which is caused because of temperature and concentration gradients. Secondly, because of non-coaxial rotation of a disk such that the disk executes cosine or since oscillation in its plane and the fluid is at infinity. The problem is modeled in terms of coupled partial differential equations with some physical boundary and initial conditions. The dimensionless form of the problem is solved via Laplace transform method for exact solutions. Expressions for velocity field, temperature and concentration distributions are obtained, satisfying all the initial and boundary conditions. Skin friction, Nusselt number and Sherwood number are also evaluated. The physical significance of the mathematical results is shown in various plots and is discussed for several embedded parameters. It is found that magnitude of primary velocity is less than secondary velocity. In limiting sense, the present solutions are found identical with published results.
In this paper the thermal buckling load of a curved beam made of functionally graded material (FGM) with doubly symmetric
cross section is considered. By instability conditions we mean the in-plane and out-of-plane buckling. The stability equations
are derived using the variational principles. The curved beam is under temperature rise for thermal loading. The solution
for critical thermal buckling load is obtained using the stability equations and the Galerkin method. The critical thermal
buckling load is obtained. 相似文献
A new method of estimating the coefficients of an autoregressive (AR) model using real-valued neural network (RVNN) technique is presented in this paper. The coefficients of the AR model are obtained from the synaptic weights and adaptive coefficients of the activation function of a two layer RVNN while the number of neurons in the hidden layer is estimated from over-constrained system of equations.The performance of the proposed technique has been evaluated using sinusoidal data and recorded speech so as to examine the spectral resolution and line splitting as well as its ability to detect voiced and unvoiced data section from a recorded speech. Results obtained show that the method can accurately resolve closely related frequencies without experiencing spectral line splitting as well as identify the voice and unvoiced segments in a recorded speech. 相似文献
Organometal lead-halide perovskites demonstrate excellent photovoltaic performance in the visible (Vis) region. However, their lack of response in the near-infrared (NIR) region limits their applications in broadband photodetectors. Here, PbS quantum dots (QDs) were successfully embedded in MAPbCl0.5Br2.5 single crystal by solution-processed epitaxial growth. Perovskites can effectively act as efficient charge transporters. The mobility of MAPbCl0.5Br2.5 with 1 wt% PbS quantum dots crystal is about 85 cm2/(V·S), which is similar to that of pure MAPbCl0.5Br2.5 single crystal. Meanwhile, the composite crystal exhibited a broadband response wavelength from the Vis (625 nm) to the NIR (850 nm) with fast response times (τon/τoff = 6/9 ms and τon/τoff = 19/43 ms in the Vis and NIR regions, respectively). The photodetector demonstrates a responsivity of 0.02 mA/W with a specific detectivity of 1.2 × 108 Jones under 5.1 mW/cm2 850-nm illumination at 10-V bias. These results suggest that we have obtained high-quality composite crystals with improved photo response in the Vis to NIR region. 相似文献