结合原理

The Luneburg lens antenna is composed of a series of concentric shells of constant permittivity. Considering the complexity of numerical calculation, this paper presents a closed-form approach, which combines the spherical vector wave method and the reciprocity theorem.

摘要伦伯透镜是一种球形分层介质天线，考虑到数值计算的复杂性，本文提出用矢量球面波理论和互易原理相结合，分析其性能。

It has referent value for the guidance of the future tourism traffic development.

结合目前中国旅游交通发展的实际情况，介绍层次需求的基本理论，根据未来国民生活方式的变化规律和层次需求理论的基本原理，对需求理论将给旅游交通带来的变化以及可能的交通发展趋势做出分析，同时提出在这种变化中旅游交通发展所面临的问题及新的思路，对于今后指导旅游交通的发展具有一定的参考价值。

In order to study the regularity of soil salt accumulation in plough layer caused by groundwater in the Yellow River Delta, GIS and the fundamentals and methods of geostatistics were applied to regionalize the study area based on the spatial distribution pattern of groundwater table and the criteria of critical water table.

为研究黄河三角洲地区地下水作用条件下耕层土壤的积盐规律，运用GIS和地统计学的原理与方法，结合地下水埋深的空间分布以及临界埋深的划分标准对研究区域进行分区，并从空间尺度对各分区地下水矿化度与耕层土壤积盐规律进行了定量分析。

In order to study the regularity of soil salt accumulation in plough layer caused by groundwater in the Yellow River Delta, GIS and the fundamentals and methods of geostatistics were applied to regionalize the study area based on the spatial distribution pattern of groundwater table and the criteria of critical water table. And for each sub-region, quantitative analysis was performed between groundwater mineralization and soil salt accumulation in plough layer at the spatial scale.

为研究黄河三角洲地区地下水作用条件下耕层土壤的积盐规律，运用GIS和地统计学的原理与方法，结合地下水埋深的空间分布以及临界埋深的划分标准对研究区域进行分区，并从空间尺度对各分区地下水矿化度与耕层土壤积盐规律进行了定量分析。

Based on the theory of least square method,combined with small residual sum of squares and large residual sum of squares,applied with the method of finite difference ,a new algorithm can be concluded .

从最小二乘法基本原理出发，结合大余量算法和小余量算法，运用有限差分的求导方法来求解Hessian矩阵，来推导试井分析中曲线自动拟合的新算法。

With painstaking efforts of generation after generation,QIAN HAO INTERNATIONAL successfully developed body-shaping underwea at last in tegrating various high technological achievements such as ergonomics,resinosis principle,etc.

Sarrautte根据女性生理特点发明了健康胸衣，历经数代人的倾心努力，纤好国际终于研制出集人体工学、流脂原理等数种高新科技成果相结合的美体内衣。

Combining with the mechanics theory of yield and fracture of metal in classical mechanics and fracture mechanics,crack formation criteria of ductile metal in stress triaxiality space is deduced by studying fracture stress field in root of notched bar made by ductile metal.

结合经典力学和断裂力学对金属屈服和断裂解释的力学原理，通过对延性金属刻痕杆刻痕根部断裂应力场分析，推导了延性金属在应力三轴空间的微观裂纹形成准则。

Combining mechanics theory of yield and fracture of ductile metal in classical strength theory with microcosmic fracture mechanics,and by studying fracture stress field in root of notched bar made of constructional steel,the author brought forward loci equation of constructional steel in stress triaxiality space.

结合古典强度理论和微观断裂力学对金属屈服和断裂解释的力学原理，通过对结构钢深槽刻痕杆刻痕根部微观断裂应力场的数值模拟，导出了结构钢在应力三轴空间的屈服轨迹方程。

In the chapter three, by using the comparison principle and frequency domain method of the discrete systems with time-delay, combining Rouche Theorem, sufficient criterions for the stabilization of the neutral type discrete control systems with multiple time-delay and the neutral type interval coefficient discrete control systems with multiple time-delay are obtained by choosing appropriate feedback controller.

在第三章，利用时滞离散系统的比较原理与时域法，结合复变函数理论中的路歇定理，通过选取适当的反馈控制律，得到了多组时滞中立型线性定常离散控制系统和多组时滞中立型区间系数线性定常离散控制系统的无条件镇定的充分性准则。

Through analysis on principle of safety valve and in combination with the function of safety valve in Hechuan Salt Mine,this paper elaborates the important role that safety valve plays in mining as well as the importance of daily maintenance for safety valve .

通过对安全阀的原理分析，结合合川盐矿安全阀起到的作用，说明了安全阀在矿山开采中的重要作用，并阐述了安全阀失效后的危害及安全阀的日常保养和维修的重要性。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐