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提出了一种新的基于Gabor小波特征重组的支持向量机人脸识别方法。该方法首先计算5个尺度和8个方向的Gabor小波变换结果,再把不同人脸中的同一尺度和方向的变换结果进行特征重组,得到40个新特征矩阵,分别利用PCA方法降维去噪,最后构造40个支持向量机分类器并采用选票决策机制决定识别结果。实验结果表明,该方法不仅拓宽了主元分析法中累积方差贡献率可选范围,并在一定程度上解决了核参数选择难的问题,同时取得了理想识别效果。 相似文献
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武器系统经济性参数的支持向量机方法分析 总被引:2,自引:1,他引:1
采用一种基于支持向量机的武器系统费用分析方法.计算结果表明,这种方法有效解决了参数法对样本量要求较高以及对非线性问题处理能力较弱等问题.与传统方法相比较,有更好的拟合精度和泛化能力,因而该方法可以作为研究此类问题的新途径. 相似文献
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Donald D. Eisenstein 《海军后勤学研究》2008,55(4):350-362
Order picking accounts for most of the operating expense of a typical distribution center, and thus is often considered the most critical function of a supply chain. In discrete order picking a single worker walks to pick all the items necessary to fulfill a single customer order. Discrete order picking is common not only because of its simplicity and reliability, but also because of its ability to pick orders quickly upon receipt, and thus is commonly used by e‐commerce operations. There are two primary ways to reduce the cost (walking distance required) of the order picking system. First is through the use of technology—conveyor systems and/or the ability to transmit order information to pickers via mobile units. Second is through the design—where best to locate depots (where workers receive pick lists and deposit completed orders) and how best to lay out the product. We build a stochastic model to compare three configurations of different technology requirements: single‐depot, dual‐depot, and no‐depot. For each configuration we explore the optimal design. © 2008 Wiley Periodicals, Inc. Naval Research Logistics, 2008 相似文献
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提出了一种实现电子产品系统集成和小型化的设计思想 ,探讨了采用FPGA (FieldPro grammableGateArray) ,SOC(System On a Chip) ,IP(IntellectualProperty)等新型逻辑器件以及EDA(ElectronicDesignAutomation)手段的设计方法 ,实现软硬件协同仿真、验证和电子虚拟样机以及设计重用的设计理念 ,为 2 1世纪智能电子产品的系统集成开辟了一条先进的技术途径。 相似文献
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本文讨论了大型稀疏线性代数方程组的迭代算法、加速方法、存贮技术及并行算法。结合向量机特点,采取有效程序优化措施,开发研制了标量和向量库程序。在YH系列机上试算结果表明:大型稀疏线性代数向量迭代库比标量迭代库速度有较大提高。当N≥100时,在YH─1机上加速比约2~8;在YH─2机上约2~7;当迭代次数增加时,加速比提高更明显;库中共轭梯度(CG)加速方法能有效地加快收敛,可减少迭代次数一半以上。 相似文献
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We present a robust optimization model for production planning under the assumption that electricity supply is subject to uncertain interruptions caused by participation in interruptible load contracts (ILCs). The objective is to minimize the cost of electricity used for production while providing a robust production plan which ensures demand satisfaction under all possible interruption scenarios. The combinatorial size of the set of interruption scenarios makes this a challenging problem. Furthermore, we assume that no probabilistic information is known about the supply uncertainty: we only use the information given in the ILC to identify an uncertainty set that captures the possible scenarios. We construct a general robust framework to handle this uncertainty and present a heuristic to compute a good feasible solution of the robust model. We provide computational experiments on a real‐world example and compare the performance of an exact solver applied to the robust model with that of the heuristic procedure. Finally, we include the operational impact of interruptions such as “recovery modes” in the definition of the uncertainty set. © 2013 Wiley Periodicals, Inc. Naval Research Logistics, 2013 相似文献
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This article studies a firm that procures a product from a supplier. The quality of each product unit is measured by a continuous variable that follows a normal distribution and is correlated within a batch. The firm conducts an inspection and pays the supplier only if the product batch passes the inspection. The inspection not only serves the purpose of preventing a bad batch from reaching customers but also offers the supplier an incentive to improve product quality. The firm determines the acceptance sampling plan, and the supplier determines the quality effort level in either a simultaneous game or a Stackelberg leadership game, in which both parties share inspection cost and recall loss caused by low product quality. In the simultaneous game, we identify the Nash equilibrium form, provide sufficient conditions that guarantee the existence of a pure strategy Nash equilibrium, and find parameter settings under which the decentralized and centralized supply chains achieve the same outcome. By numerical experiments, we show that the firm's acceptance sampling plan and the supplier's quality effort level are sensitive to both the recall loss sharing ratio and the game format (i.e., the precommitment assumption of the inspection policy). © 2013 Wiley Periodicals, Inc. Naval Research Logistics, 2013 相似文献
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