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A series of theoretical and experimental studies on the microstrip patch antennas with dielectric superstrates is carried out systematically. Firstly, a comprehensive survey of the microstrip antenna technology and its theories are presented. Then, two analysis techniques, named as the spectral domain Green's function method and the spectral domain integral equation method are developed. The SDGF method is a simplified analysis technique, which takes advantage of the spectral domain immittance approach to find the dyadic Green's function for the stratified media, and obtains the complete closed-form formulas for radiation patterns, directivity, efficiency, gain etc. Some interesting calculated results are presented. The SDIE method is capable of determining resonant frequency, radiation characteristics, input impedance etc, for the covered microstrip patch antennas. Comparing with other full-wave analyses it reduced computation and mathematical labour remarkably. The singularities near the pole location of the surface-wave modes and the difficulty of the integral computation over infinite range of oscillating integrands are dealt with actively and documented well. Results predicted by the SDIE method agree extremely well with our experimental results for resonant frequencies of various superstrates. The superstrate effects on impedance and radiation characteristics also have been investigated experimentally so that the gap due to lack of measured data and computed results for multi-layered superstrate has been filled to some degrees and two useful observations have been achieved for weakening the resonant frequency shift and optimizing the microstrip antenna gain. As a meaningful application, the design and analysis of a 4×4 patch array are introduced.
实用微带天线普遍加介质覆盖层来防护热,物理损伤和环境影响,也可能在飞行或严酷气候条件下自然形成覆盖层本论文对带介质覆盖层的微带贴片天线系统地作了一系列理论和实验研究首先,对微带天线技术和理论作了全面的综述然后,发展了两种分析方法,称为谱域格林函数法和谱域积分方程法SDGF法是一种简化的分析技术,它利用谱域导抗法来求得分层媒质的并矢格林函数,并得出方向图、方向性系数、增益等参数的完整的闭式公式,给出了一些令人感兴趣的计算结果SDIE法能确定介质覆盖微带天线的谐振频率、辐射特性和输入阻抗等与其它全波分析方法相比,它明显减小了计算量和数学工作量已有效地处理了表面波模极点附近的奇异性和对振荡的被积函数的无限区间积分计算的困难对于不同覆盖层情况下的谐振频率,由SDIE法所预示的结果与我们的实验结果吻合得很好对于覆盖层对阻抗和辐射特性的影响也已作了实验研究这在某种程度上填补了缺少实验数据和计算结果之间的间隙,并得出了缓解谐振频率偏移和优化天线增益的两点有用的结论作为有意义的应用,介绍了一个4×4元矩形贴片天线阵的设计和分析。
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On the one hand, through regional, national productivity, the inherency of labor has taken the form of productivity, and develops to human productive forces which have the ability to have a comprehensive system in a capitalist society, that is the domain of human freedom; On the other hand, the externalism or externality of labor, has taken the form of relations of production, through exchange and private ownership, generates the alienation of labor and capital in capitalist society ,then formats other social relations and develops personal ability one-sided, being in survival of alienation living model, losing transcendence or freedom; this is a double of the human world.
这一过程,既是作为劳动内在性表现形式的生产力在其发展中,不断扬弃劳动外在性或落后的生产关系而推动历史前进的过程,同时也是扬弃"人的依赖关系"而形成"物的依赖关系"的过程。
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The paper is based on Professor Hu Yong-shengs academic thoughts and clinical experience, and have a research on formula and herbs of treating hypertension of irascibility. Summarizing the law of his using formula and herbs while treating hypertension , so as to have benefit to clinical work in treating this kind of disease .
本文在继承国家名老中医胡永盛教授学术思想及临证经验的基础上,对其治疗高血压病肝火亢盛证方药进行研究,总结出治疗本病的规律,以期对临证治疗用药有所裨益。
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Blame it on SimX and DoriftoKids, they're painful to judge, simply because both of these two teams have done great in some aspects, but made some mistakes at other aspects of their run, after concluding their scores, I keep getting the same score between them, no if you watch the replay, you'll notice their runs aren't similar, but they both made a fair share of mistakes in order to share that same score over and over again , I have been reviewing my scores of all teams for 3 times, and reviewed the scores between SimX and DoriftoKids for 5 times, trying desperately to find the little details in which I can deduct the points on, but failed I was, so I thought to myself... why not just let the two teams in....
只能怪SimX和DoriftoKids,这两支车队太难分出优劣了,因为他们在比赛中都在一些环节发挥出色,也在一些环节犯了错误,每次为两队评分后,我总是得到相同的分数,但是如果你看了录像,你会发现他们的跑法是不同的,但是他们犯了差不多的错误以致于每次的评分都相同,所有车队的成绩我都检查了三遍,并且这两支队的成绩检查了五遍,尽全力寻找可以扣分的细节,但是失败了,所以我对自己说,两支队为什么不能都进决赛呢。。。
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You have enter key on keyboard and no2.you have enter key on keypad....
第1,按键盘上的回车键;第2,按小键盘上的回车键。
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Above all, buffalo is degree of a kind of seed selection is planted relative to inferior cultivate, have stronger vitality, disease-resistant force and be able to bear or endure the ability of thick raise, from development degree taller Italy arrives the less-developed country with development inferior degree, on the history, buffalo is done not have or had fed the feed of animal source sex such as pink of flesh and blood, fish meal without raise almost, straight so far, the whole world returns the report of disease of mad without a buffalo happening ox or urticant disease, be like mad ox disease, urticant disease, avian flu, Aibola disease to wait for harm mankind health in more and more animal sex diseases today, we can say, buffalo still is a god-given Sukhavati; so far next, the gust of water milk and its nutrition character have other to suckle kind of dominant position that cannot compare, an orgnaization of England undertook grandma of water milk, grandma milk, goat and artificial synthesis are suckled savour an experiment, via repeating for many times, join the person that try to be able to accurate winkle buffalo is suckled and state they are right the partial; of its gust the 3rd, as the addition of global population and the growth that suckle kind of consumption group, allergic to milk number also rises ceaselessly, but have to suckling milk.
首先,水牛是一种选育程度相对较低的畜种,具有较强的生命力、抗病力和耐粗饲的能力,从开发程度较高的意大利到开发程度较低的欠发达国家,在历史上,水牛就没有或几乎没有饲喂过骨肉粉、鱼粉等动物源性饲料,直到目前为止,全世界还没有一例水牛发生疯牛病或痒病的报道,在越来越多的动物性疾病如疯牛病、痒病、禽流感、埃博拉病等危害人类健康的今天,我们可以说,水牛到目前为止仍是一块难得的净土;其次,水牛奶的风味及其营养特性具有其它奶类不可比拟的优势,英国的一个机构进行了一次水牛奶、奶牛奶、山羊奶和人工合成奶的品味试验,经多次重复,参试者都能准确的挑出水牛奶并表示他们对其风味的偏爱;第三,随着全球人口的增加和奶类消费群体的增长,对牛奶过敏的人数也不断增长,但对奶牛奶有。。。
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If I would like to have a duplicate of your kitty to sit on my so-called lap up here on the Eighth Dimension and here again "up" is only relative, then I could have her.
如果我想复制你们有可爱的小猫,让她在第八维度在这里我的腿上蹦跳而这里再次"往上"只是相对的,然后我可以拥有她了。
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At first, this paper conducts in depth research on classification method, compaction propeties, granulometric composition and crushing of stone. On the basis of clarifying engineering characteristics of material of rock-filling embankment, requirements of ground treatment have been put forword in this paper. Then combined with the site test and engineering practice in SHUINAN Road and LANLIN Road, through the synthetical analysis of factors of influencing densification effect for the maximum grain size of filling material, lay-down thickness, granulometric composition, densification machinery and densification frequency etc., this paper studies key technical problems about construction technologies for spreading and leveling of filling material, choosing densification machinery, densification technology and slope construction systematically. Finally, construction technologies of filling lime-stone and sand-stone roadbed have been proposed in this paper ,which are significant for quality guarantee of highway engineering.
本文首先从石料的分类方法、压实特性、粒径组成以及破碎性等方面进行研究,在明确填石路基填料的工程特性基础上,进而提出了填石路基的地基处理要求,然后结合广西水南路和甘肃兰临路填石路基试验路段上的现场研究,通过对填石路基填料最大粒径、松铺厚度、粒径组成,压实机械以及碾压遍数等影响压实效果因素的综合分析,系统研究了填石路基填料的摊铺与整平技术、压实机械选型技术、压实工艺以及边坡施工技术等施工工艺中的关键问题,最后提出石灰岩类和砂岩类填石路基的施工工艺要求。
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And as you can see it's a simple editor and can be set in different mode, in order for you to do different things, on the left rectangular section I have my opened files, and on the right I have modes, so click the file menu and save the file with the mg extension.
正如你可以看到这是一个简单的编辑器,可以在不同的模式,以便为您做不同的事情在左边的矩形截面我有我打开的文件,并在右边我的模式,因此单击文件菜单并保存该毫克扩展名的文件。
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Some new results on the most practical design techniques—Gain Scheduling control have been acquired via applying approaches of poles assignment, parameter Lyapunov function approach and robust control based on linear fractional transformation , parts of which have been applied in the control systems design of underwater vehicle.
本论文针对工程上最常用的设计方法变增益控制,应用极点配置、参数Lyapunov函数法、基于线性分式变换的鲁棒控制方法进行了研究,得到了一些新的结果,并把部分结果应用到国防尖端武器水下潜器的控制系统设计中,得到了优于冻结系数法的控制性能。
- 相关中文对照歌词
- Have A Drink On Me
- Angels We Have Heard On High
- (God Must Have Spent) A Little More Time On You
- A Mighty Fortress / Angels We Have Heard On High
- Angels We Have Heard On High
- Angels We Have Heard On High
- Angels We Have Heard On High
- Angels We Have Heard On High
- Angels We Have Heard On High
- When He Walks On You (Like You Have Walked On Me)
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力