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Based on the Fresnel diffraction integral, the analytical expression for the field distribution of converging spherical waves passing through an annular aperture is derived and some special cases are discussed.
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摘要基于菲涅耳衍射积分公式，推导出了会聚球面波通过环形光阑后场分布的解析公式，并讨论了一些特殊情况。 |
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Based on the HSPICE simulation, this current source is proves to be insensitive to supply voltage from 2.5 V to 3.5 V.
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利用HSPICE仿真软件可以证明在电源电压2.5～3.5V间，电流源和电源电压的变动无关。 |
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Based on the HSV color model, the method regards the saturation as principle to distinguish the foreground and background, then uses mathematic morphological operation and boundary detection technique to extract valid district of steel pieces.
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采用HSV颜色空间，并以饱和度为主区分前景和背景，再综合运用数学形态学运算及边界跟踪技术提取出钢块的有效区域。 |
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Based on the Hmiltonian expression for hydrogen atom in combination with the theory proposed, the theoretical values of the hydrogen atom's energy, ground state energy and spectrum constant and the electron orbital angular momentum are given.
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根据氢原子的量子哈密顿量表示，结合创新的量子算符代数理论，得到氢原子的能量、氢原子的基态能量、电子轨道角动量、氢原子的光谱常数等各种物理量的理论值。 |
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Based on the Lyapunov stability theory, this paper analyzes thetransient energy function methods for power system transient stability analysis, and considers the quantitative analysis and fast speed as their advantages, but the unreliability as their limi
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基于李雅普诺夫稳定理论，对用于电力系统暂态稳定分析的暂态能量函数法进行了分析，认为可定量分析和快速性是其独特优势，不可靠性是其局限性。 |
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Based on the MAPGIS software, this paper discusses the method of dividing layer, assigning layer, coding layer of graphic data and the method of coding ID key character related to the attribute data in the process of establishing the geological disaster i
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摘要介绍了基于MAPGIS平台建立瓦窑沟流域地质灾害数据库过程中，图形数据的图层划分、命名、编码及与属性数据相连接的ID关键字段的编码方法。 |
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Based on the MMX1 sprite design, because I think the boob lights look dumb.
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根据洛克人X1的人物设计﹐因为我认为后来他胸部上的灯看起来很蠢。 |
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Based on the MVC mode, a flexible water quality system was developed, which offer a new way to realize forecast process of dynamical water quality.
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并在此思想基础上探讨了利用该方法实现可灵活配置的水质模型系统，为实现动态的水质预测过程提供了一种新途径。 |
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Based on the Mandel-Flaming model and the theory of ternary paradox, the paper has analyzed the effect of the monetary policy of China, pointing out that, under the condition of open economy, a three-level optimization is needed to raise the effect of the
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摘要基于蒙德尔－弗莱明模型及“三元悖论”理论，对中国货币政策效用进行了解析，指出在开放经济条件下提高货币政策效用，需要进行三个层次的优化：货币政策工具及内部组合优化、货币政策与财政政策配合优化、货币政策与汇率政策协调优化。 |
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Based on the NURBS technique and the theory of partition for geologic body, the 3-D engineering geologic model for underground structures is established.
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摘要工程区域地质条件是影响地下洞室群布置最主要的因素。 |
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Based on the Push-Pull theory which explains population migration motive most thoroughly and synthetically, the paper constructed the push-pull model affecting the transfer decision-making for the peasant worker's settling down in city.
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摘要本文以对人口迁移动因解释最为全面综合的推拉理论为基础，建立了影响我国农民工城市定居转移决策的推拉模型。 |
