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Finite wide-angle biconical antenna ; modal analysis ; finite integration ; input impedance

有限长宽角双锥天线；模式匹配；有限积分法；输入阻抗

By using symmetry and boundary conditions the field and input impedance of finite wide-angle biconical antenna can be derived by modal analysis, which generally results in solving infinite linear equations.

模式匹配法利用有限长双锥天线的轴对称性求解天线电磁场边值问题，通常导致求解无限多个线性方程而得不到严格解。

Leaves narrowly lanceolate, 4-8 mm wide; achenes biconvex, 1-1.5 mm.

叶狭披针形，4-8毫米宽；两面凸的瘦果，1-1.5毫米 37 P 。

This is a great way to connect you to the whole world wide web in your bid for the highest price possible.

这是一个很好的途径连接到整个万维网在您的出价最高价可能的。

with the development of satellite navigation communication,antenna is a very important unit,performance of the satellite navigation communication system is affected by it partly.a new type of bifilar helix for satellite navigation communication system is introduced,and the traving-wave bifilar helix is analyzed briefly.meanwhile,the design and the test results are given.the results show that the antenna possesses excellent circular hemispherical beam with wide angle circular polarization and better impedance match,and has a compact structure and high integration.it can be applied in caps systems successful.

小 摘要：随着卫星导航通信技术的迅速发展，天线作为卫星导航通信系统中的重要部分，在一定程度上决定着卫星导航通信系统的性能。介绍一种用于卫星导航通信系统的双臂螺旋天线，讲述爬行波式螺旋天线的设计过程，并给出最终测试结果。结果表明，该天线具有优良的圆对称半球波束，良好的广角圆极化特性和优良的阻抗匹配特性，其结构简单、紧凑，为通信入站回传提供了一种优良的选择。

Discussion on Catastrophe Risks in China from Earthquake and Tsunami in the Indian Ocean ;2. Preliminary study on appropriate environmental parameters for bigeye tuna longline fishery in the Indian Ocean ;3. The "charge/discharge" roles of the basin-wide mode of the Indian Ocean SST anomaly——influence on the South Asian High in summer

印度矿粉由于其高铁低硅，并且价格低廉，因此受到国内多个钢铁厂的青睐，为了充分发挥其优势，从不同品味的印度矿粉出发，得出其各自的烧结特点，找出不同品位印度矿粉对烧结矿的冶金性能的不同影响，并通过对烧结矿的显微结构和矿物组成分析了微观组织结构的变化规律，找出内外部条件的依存关系，有效指导了天钢烧结生产。

The BIL is considerably more complex because it also provides support for a wide range of techniques such as Aspect Oriented Programming, Delegations, Generic Programming, and more.

在胆红素是复杂得多，因为它也提供诸如为1胜广泛的技术支持导向编程，各代表团，通用编程，等等。

An emerald green pelt, a shape like a shaggy billy goat, and a moat of seawater give all the clues you need:It's Ireland, as eyed by a satellite, enjoying an island-wide sunny day in early June.

被海水包围着，一团形状酷似毛发杂乱的雄山羊般的翠绿色"毛皮"为你提供了所有需要的线索：这是从卫星上拍摄的爱尔兰，整个岛国都沐浴在6月初的阳光里。

High density polyethylene with wide or bimodal molecular weight distribution was prepared by using bimetallic composite catalysts.

采用双金属复合催化剂制备出了宽或双峰分子量分布的高密度聚乙烯，并对所合成出的聚合物进行了结晶行为分析、分子量及分子量分布测试。

He was a distinguished biochemist, but is more widely known as the author of many works of science fiction, books on science for non-scientists, and essays on a wide variety of subjects.

他是一位杰出的生化学家，但是他更广为人知的身份却是多部作品的作者。他的作品包括科幻小说、科普著作和题材广泛的随笔。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。