扇形場 的英文怎麼說
中文拼音 [shānxíngchǎng]
扇形場
英文
sector field-
Abstract : a new waveguide which can change the wide wall of a rectangular waveguide into a symmetric arc wall is named as a cam - rectangular waveguide. comparing to sectoral waveguide, the new waveguide has the same voltage characteristics and is easier to be produced and fixed. an approximate formula of the dominant mode fields and the normalized conductance of a longitudinal resonant slot cut in the curved wall of a cam - rectangular waveguide are given. a resonant slot linear array in c & x band is designed, in which the slot voltage distribution is equiphase and the input is matched. the input voltage stationary ware ratio and the h - plane pattern of the antenna are measured. the experimental results show the conformance with theoretical results
文摘:把常用的矩形波導一個寬面改成圓弧形構成的波導稱為圓突-矩形波導.這種波導與扇面波導相比：電性能相當；波導管結構更加簡單，容易加工，便於安裝.文中給出圓突-矩形波導中主模場，圓曲面上縱向槽歸一化諧振電導近似公式.設計了c和x波段波導曲面縱向諧振縫隙線陣，縫隙電壓相位為同相分佈，輸入端匹配.實際測量了天線輸入端電壓駐波比和h面方向圖，理論與實驗相吻合4 press w et al. numerical recipes in c : the art of scientific computing. 2nd edition, cambridge : cambridge univ
然而值得注意的是，扇形在仿射空間中並不是一個曲線，它只是矢量空間中的一個矢量場。This article starts with the following aspects to study and solve the following practical problems, 1 the foundation for vessels to keep away from and withstand typhoon the article briefly introduces typhoon ' s weather characteristics, weather structure, number, naming, forming, development and its law of movement. it also discusses the ways and significance for merchant ships to collect in all - round way the information of typhoon and to make spot forecast, doubts the applicability of " barometric daily change correction table ", and puts forward the author ' s view on the judging ways on the ship ' s location in gale circle. this chapter mainly discusses the process of decision - making and the application of technology, brings forward the concepts of the objective, the policy and the ship disaster plan and disaster supply kit. this chapter also approaches the juristical relationship between master and anti - typhoon team leaders, explains the concrete meassures and the keypoit on technological application, and points out the points to be discussed in sector means of typhoon avoidence
船舶避抗臺風基礎本文根據最新資料扼要地介紹了臺風的天氣特徵、天氣結構、編號、命名、形成、發展及其活動規律；討論了民用商船全面收集臺風信息和資料作出船舶現場預報的途徑及其重要意義，對「氣壓日變化訂正表」的適用性提出了質疑，並對船舶在臺風大風圈內所處部位的判定方法提出了自己的見解；本文重點論述了船舶避抗臺風的決策過程和技術應用，提出了船舶避抗臺風的目標、方針和船舶「防抗臺應急包」船舶避臺算機標繪的概念門x討了船k勺公司防抗臺領導小組在船舶防抗臺過甜中的法叫』大系， m述了避抗臺風汀仰拙施和技術的應用要點，井指出了「扇形避離法」的位徘商郴之處。The lithological traps related to jishan delta ? turbidite fan depositional system inherently developed during the base level falling period of c3 cycle and the base level rising period ; the lithological traps related to the underwater fan depositional system near xiakou fault developed during c2 cycle ; the lithological traps related to qudi fan delta developed during the base level falling period of c2 cycle ; and there are a few lithological traps related to shangfeng delta. these predicted traps are mainly distributed in the deeply low - lying areas
在沉積體系、沉積相研究的基礎上，對臨南窪陷沙三段巖性圈閉分佈作出了預測，指出了各旋迴基準面下降期是尋找巖性圈閉的有利層序地層位置， （扇）三角洲前緣滑塌作用或快速充填作用形成的濁積扇或滑塌作用形成的濁積巖體是巖性圈閉形成的主要場所。Based on the nonlinear parabolic approximate wave reflection - diffraction equation of mild slope, a model of wave propagation on a fan - shaped coordinate is put forward considering winds, bottom friction and wave breaking, etc. the existing calculation shows that the model can be employed to determine wave fields in large water areas
接著以非線性的拋物型近似波浪緩坡方程為基礎，提出了扇形坐標下的波浪傳播模型，模型包括了風、底摩阻、波浪破碎等因素的影響，可以用於大水域的波浪場的確定；文章最後介紹了一些計算算例。Model and application for flow field of tapered windscreen fan
錐形風幕風扇的流場模型及應用Near the faulty step - break, low stand system developed, and some sediment system distribute broad, such as alluvial fan, low stand wedge, low stand fan, and so on. the sand body can form not only the trap of dying out upward and sand lens, but also fault - iithology trap. the study shows that fault - lithology trap is most important trap style in study area especially sha - 3 formation
斷階坡折附近是低水位體系域發育的重要場所，常發育沖積扇、沖蝕作用的下切河道以及低水位楔狀體、低水位扇體等沉積體系，這些砂體不僅具有形成上傾尖滅或砂巖透鏡體圈閉的條件，而且可形成斷層?巖性圈閉。The most favorable reservoirs of study formatioms in study area are delta river mouth bar sand body and sublacustrine fan sand body. the sublacustrine fan sand body region developed in each sand group and the river mouth bar sand body region developed in gao 5 sand - group are the most favorable regions of developing lithologic traps
研究區研究層段的最有利儲層是三角洲河口壩砂體和湖底扇砂體，各砂組發育的湖底扇砂體區和高5砂組發育的河口壩砂體發育區是形成巖性圈閉最有利的場所。Quality of wind tunnel relates not only to airflow shape and outside frame but also subjected to the control system of electromotor. the rotate speed of fans and the speed press of flow field at experimental segment are the primary parameters for control
風洞流場的品質除與風洞氣動外形及內部構造有關外，關鍵取決于風洞風扇電機控制系統，其調節的主要參數是風扇電機的轉速和試驗段流場的速壓。In order to get a finite element formulation to analyze singular heat flux fields, the weak form of basic equations and boundary conditions describing the 2d heat conduction eigenproblems is derived for the sectorial domains in the vicinity of the interfacial crack tip
摘要為得到用於分析奇異熱流密度場的高效的有限元列式，針對不同材料中界面裂紋尖端的扇形區域，推導出二維熱傳導特徵解問題的基本方程和邊界條件的弱形式。分享友人