three-second zone 中文意思是什麼

three-second zone 解釋
3秒區
  • three : n. 1. 三個人[東西]。2. 三歲，三時。3. 【板球】3字型。
  • second : adj 1 第二的；第二次的；二等（的）。2 次等的；較差的；劣於…的 （to）。3 〈美國〉較年輕的。4 另一...
  • zone : n 1 【地理】（地）帶。2 區域，范圍，界。3 〈古、詩〉（腰）帶。4 圈，環帶。5 【數學】（球面）帶；...
  1. The formation of oil and gas experienced three periods with different temperature peak zone : first, 120 - 125, oil generation period ; second, 140 ~ 150, condensed oil generation period ; third, 160 - 190, condensed oil and dry gas generation period. likewise, the migration of oil and gas are divided into three stages : from early esi to late ng, then from early nm to mid nm, and last from late nm to now. we can see clearly that oil and gas began to migrate with large scale after nm

    其中，油氣形成有三個時期，其溫度主值區間為：第一期， 120 125 ，為生油時期，第二期， 140 150 ，為凝析油生成時期，第三期， 160 190 ，為凝析油和干氣生成時期；油氣運移期次為三期：即沙一早期?館陶末期，明化鎮早期?明化鎮中期和明化鎮晚期?現在，而且明化鎮晚期以後油氣才發生大規模運移。
  2. The conformal microstrip antenna with some unique character has been applied in many fields, especialy on speedy objects. in this paper, an efficient fdtd algorithm is introduced to analyse the microstrip antenna. firstly, the fdtd formula in descartes coordinate system and in cylindrical coordinate system are obtained from the time _ dependent maxwell equations using the yee algorithm in a calculating region where the dielectric parameters are independent of time and space. the choice of the space discretization units and the time discretization interval are discussed which are decided by the accuracy and stability respectively. the shape and setup of the excitation source are discussed too. the excitation source is chosen to be gaussian pulse in shape. secondly, the mur ' s first - order and second - order boundary condition are deduced in cylindrical coordinate system. the methods of transforming radiation fields from near zone to far zone in the frequency domain and in the time domain are presented when fdtd is applied to analyse the characteristics of far zone. finally, three kinds of microstrip antennas are analysed. they are a slot antenna that lies on a plane ground of a microstrip, a slot antenna that lies on a cylindrical ground of a microstrip and a microstrip line _ fed aperture coupled stacked rectangular patch antenna in cylindrical coordinate system

    本文從麥克斯韋旋度方程出發，建立了笛卡兒坐標下無源空間中均勻無耗媒質的fdtd基本方程和圓柱坐標下無源空間中均勻無耗媒質的fdtd基本方程，詳細討論了fdtd法計算中時間步長和空間步長的選取原則以及激勵源的類型和設置；推導了mur一階和二階邊界條件在圓柱坐標下的差分格式；給出了在用fdtd法計算天線的遠場輻射特性時必需採用的頻域和時域近場遠場變換技術；最後用fdtd法計算了平面微帶縫隙天線、柱面共形微帶縫隙天線和柱面共形微帶層疊天線的輸入阻抗和遠區輻射場，並分析了天線的一些參數的變化對天線輸入阻抗的影響，得出了一些有用的結論。
  3. The present paper probes into three of these dimensions, namely, the enterprise - manufacturer, industry - trade and region - zone dimensions, arguing that spatial agglomeration is characterized by business growth and spatial expansion on the first dimension, with its functional mechanism embodied as internal economies of scale and scope ; by adjacency of enterprises on the second dimension, with its functional mechanism being external economies of scale and scope ; and by regional integration of the industry as a whole on the third dimension, with it functional mechanism being regional external economies of scale

    文章從企業廠商、產業行業和區域地帶三個尺度研究了經濟活動空間集聚，認為在企業廠商尺度上，空間集聚特點是企業增長和空間擴張，作用機理是內部規模經濟和內部范圍經濟；在產業行業尺度上，空間集聚特點是企業的空間鄰近性，作用機理是外部規模經濟和外部范圍經濟；在區域地帶尺度上，空間集聚特點是產業的區域復合，作用機理是區域外部規模經濟。
  4. A brief introduction of cassia plaza hotel in kunming city cassia plaza hotel is a three - star hotel open to foreign tourists, built with the fund offered by yuxi red tower aggregation. located at the crossroad of dianchi road and xiyuan road, the hotel enjoys a golden position, for its traffic condition is perfect it can be reached within one minute from fuhai overpass at the second ring - road, and it takes just 10 minutes to get to the airport and train station, and what s more, one can get to dianchi national tourism holiday zone and yunnan ethnic village within 20 minutes by traveling southwest along dianchi road ; besides, one can reach the city s center by taking more than 10 different number of buses at their bus stops existing on xiyuan road, southern ring - road and western ring - road just near the hotel itself

    昆明桂花大廈是玉溪紅塔集團投資興建的三星級旅遊涉外酒店，位於昆明市滇池路與西園路交叉口的黃金地段，出行旅遊的交通條件十分便利：從二環路的福海立交橋下來1分鐘即可到達，酒店距飛機場和火車站也僅需十多分鐘車程，沿著滇池路往西南方向，十多分鐘就可到達著名的滇池國家旅遊度假區和雲南民族村從酒店向東北面，環城西路環城南路西園路有10多路便捷的公交線路讓您只需十分鐘就可進入昆明市中心的繁華商業區。
  5. Megabox is built around totally connected modules. this proprietary " tcm " concept is realised in three ways : first, in the free - flow of visitor traffic facilitated by the express escalators and elevators connecting the mall s three major zones ; second, in the convenient vehicular driveway reaching all floors enabling drivers to quickly reach the topmost zone in only three loops ; and third, the mall s ultimate connectivity with the outside environment through its ball and beehive atriums, both incorporating six - storey glass windows which allow natural light to flood into the building and gives the shoppers scenic vistas of kowloon and hong kong

    全貫通的概念分三大層面第一是商場內的行人可透過特設的高速接駁電梯穿梭三個主題區域，方便商場內的流通第二是商場各層與駕車人士的貫通， megabox除可供車輛駛至商場各層外，設計更包括特快車道，讓車輛可迴旋三圈即達高層，加倍省時方便第三是商場與外部環境的貫通，由於商場的建築特色包括擁有六層落地玻璃的beehive atrium ，讓光線與港九景緻全面透入，商場內外融匯成一體，完全體現全貫通的精粹。
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