前中心線 的英文怎麼說
中文拼音 [qiánzhōngxīnxiàn]
前中心線
英文
center front line-
Ringing a telephone now requires copper wire from the central exchange to the home.
目前的電話鈴聲則需要靠從中心交換臺通到用戶家中的銅線進行工作。It compute the parameter of deflexion caused by thermal distortion in orbit, deduce the general expression for spreading beam after thermal distortion of reflector and the center deflexion of facula received in ccd. with the method of fixing etc, it put forward the restrain measures adopted accordingly
計算了在軌運行條件下反射鏡面熱變形引起的表面法向偏轉參數，推導了鏡面變形后出射光線的通用表達式以及鏡面變形前後在ccd探測器上的接收光斑中心偏轉量的計算表達式。As the hypothetical epicentre of pandemic influenza, hong kong has been at the forefront of research into the epidemiology of influenza viruses, avian, animal and human for many years
作為爆發全球性大型流感的假設性中心，香港無論于流感病毒、禽鳥、動物或人類身上所作的流行病學研究，都是一直走在前線。Making use of the packet data service and short data service of tetra, the mcs system enables front - line officers to use their portable radios and in - vehicle mobile data terminals mdts to exchange data messages with rcccs
流動電腦信息系統利用地面集群無線電的封包數據服務和簡短數據服務，令前線警務人員可以使用手提無線電通訊機和車上的流動數據終端機與總區指揮及控制中心交換數據信息。Nystatin was listed in the first class of drug catalogue for national basic medical insurance in 2000, netilmicin sulfate and roxithromycin were listed in the second class of drug catalogue for national basic medical insurance. all its products passed china gmp inspections in 2001. zhenyuan pharm is establishing a bulk drug center in shaoxing paojiang technological and industrial zone to create a much brighter future
目前，公司員工800餘人，專業技術隊伍佔三分之一，具備完整的銷售服務系統研發中心質監中心，所有原料藥制劑粉針劑生產線均通過國家gmp和iso9001質量體系iso14001環境體系的認證，羅紅黴素還取得了歐洲cos證書。Based on the two ctd data sets from the cruise of the summertime in 2000 and wintertime in 2001 in bohai sea and the collected historic observed thermohaline data, we analyse systemically the distributional characteristics of temperature, salinity and density in wintertime and summertime in the bohai sea and the results reveal that the current hydrologic characteristics of the bohai sea have some obvious variances relative to the previous research results. in summer there are three low - temperature centers in the middle - layer and underlayer of the middle parts of the bohai strait, liaodong bay - mouth and bohai bay - mouth, but there is a uniform high - temperature center in the middle part of the bohai sea. in winter the isotherms extend westward and northward to the bohai sea from the warm core of the bohai strait and a cold - water tongue off the qinhuangdao spreads southeastward out, so the saddle - like isotherm pattern is formed in the middle part of the bohai sea
利用2000年夏季和2001年冬季渤海兩次ctd資料和以前收集的渤海溫鹽調查資料，分析了渤海冬、夏季溫鹽密度的分佈特徵，結果表明，渤海現有的水文特徵與以往研究結果相比發生了明顯的變異：夏季在渤海海峽、遼東灣口和渤海灣口中部中、下層存在三個低溫中心，在渤海中部則出現一個上下均勻一致的高溫中心；冬季等溫線以渤海海峽暖中心向西和向北兩個方向伸入渤海，而從秦皇島外海有一冷水舌向東南方向伸展，在渤海中部海域形成「馬鞍狀」等溫線結構。Spurred on by rather unappetizing u. s. battlefield food known as meals ready to eat, scientists at the army soldier systems center in massachusetts have devised a vacuum - sealed sandwich that stays edible for up to three years
由於以往美國前線上供應的"速食食品"實在難以下咽，於是位於馬薩諸塞州的"軍隊戰士中心"發明了一種真空包裝的三明治，這種三明治的保質期可以長達3年。The thermal visualizations of jet impingement cooling with single or double row holes inside semi - enclosed channel are measured by using infrared camera and then the impingement cooling heat transfer coefficients are deduced. the effects of flow and geometry parameters on convective heat coefficients are obtained. the results show that : for a single row normal impingement, the impingement cooling effectiveness is enhanced with the increase of impinging reynolds number or the decrease of hole space to diameter ratio, and the best effectiveness is achieved under the jet - to - surface spacing equals to 2 ; when the jet is oblique to the confined wall, the cooling effectiveness is weaken especially under the jet - to - surface spacing ratio is greater than 2 ; for double rows normal impingement cooling, the cooling effectiveness of rear row jet is weaker than the front row under lower impinging reynolds number or bigger jet - to - surface spacing
對于單排垂直射流，沖擊冷卻效果隨射流雷諾數的增加、孔間距與直徑比的減小而得到提高，沖擊間距比為2時換熱效果最好;沖擊孔中心線向通道封閉一側傾斜后，射流沖擊冷卻的范圍變窄，當沖擊間距比大於2時駐點區的對流換熱能力明顯降低;對于雙排沖擊射流，孔排間距與直徑比的增加使沖擊冷卻范圍變大，但在兩排孔之間區域的對流換熱系數有所下降;在較小的沖擊射流雷諾數和較大的沖擊間距比下，後排射流的沖擊換熱效果要遜於前排射流。A novel dynamic evolutionary clustering algorithm ( deca ) is proposed in this paper to overcome the shortcomings of fuzzy modeling method based on general clustering algorithms that fuzzy rule number should be determined beforehand. deca searches for the optimal cluster number by using the improved genetic techniques to optimize string lengths of chromosomes ; at the same time, the convergence of clustering center parameters is expedited with the help of fuzzy c - means ( fcm ) algorithm. moreover, by introducing memory function and vaccine inoculation mechanism of immune system, at the same time, deca can converge to the optimal solution rapidly and stably. the proper fuzzy rule number and exact premise parameters are obtained simultaneously when using this efficient deca to identify fuzzy models. the effectiveness of the proposed fuzzy modeling method based on deca is demonstrated by simulation examples, and the accurate non - linear fuzzy models can be obtained when the method is applied to the thermal processes
針對模糊聚類演算法不適應復雜環境的問題，提出了一種新的動態進化聚類演算法，克服了傳統模糊聚類建模演算法須事先確定規則數的缺陷.通過改進的遺傳策略來優化染色體長度，實現對聚類個數進行全局尋優;利用fcm演算法加快聚類中心參數的收斂;並引入免疫系統的記憶功能和疫苗接種機理，使演算法能快速穩定地收斂到最優解.利用這種高效的動態聚類演算法辨識模糊模型，可同時得到合適的模糊規則數和準確的前提參數，將其應用於控制過程可獲得高精度的非線性模糊模型Crystal zirconium phosphate - phosphonate has the stability and regulity of interlayer floor of inorganic a - zirconium phosphate, they still have the designability of the organic group in the interlayer and adjustment of the ratio of organic and inorganic phosphorus acid, they are a kind of potential smart material, we can process molecule design and optimize filtration according to the requirement of goal reaction, we can prepare special ion - exchange, catalyst, catalyst supporters nonlinear optics compound, solid state proton conductivity and the intercalation complex precusor by introducing different active organic group or active center into the choice and stable framework of inorganic a - zirconium phosphate
有機?無機晶態混合磷酸鋯具有無機磷酸鋯的層板穩定性和規整性，同時具有層間有機基團的可設計性和有機無機磷酸混合配比的可調節性的特點，是一類很有潛力的靈巧材料，並且可以根據目標反應的要求進行分子設計和優化篩選，在無機磷酸鋯優良穩定的骨架上引入不同的活性基團或活性中心，可以制備出性能獨特的離子篩、催化劑、催化劑載體、非線性光學物質、固態質子導體和制備插層復合物的前驅物。After the introduction of the selected elements, the thesis gives out a design which includes a front control center based on siemens s7300 plc 、 a line connection of the master profibus and the distributed intelligent i / o et200m system 、 a real - time display system of pressure sensors and a gas supply system with stop valve and electric actuator
本文在介紹了所選擇器件情況基礎上，設計了基於siemenss7300plc為前端控制中心，利用profibus總線接分散式智能i / o et200m系統，壓力傳感器現場顯示，截止閥加電動執行器實現配氣的方案。Fellow practitioners in mexico contacted people at the local red cross and the relief command center, who provided them with detailed information and route directions. they even dispatched an army helicopter taking fellow practitioners to explore the disaster area, so they could find out the real damage, and the amount of relief material required. they found the victims were badly in need of warm clothing, water and food
墨西哥同修與該國紅十字會及災區指揮中心聯絡，他們提供了詳細的資料及路線，並以軍方直升機載運同修前往災區勘察，實際了解受害的情形以及災民所需援助的項目，發現避寒衣物水及糧食是急缺，於是聯合墨國及巴西境內各小中心的同修們，聯手合力搶救災民。Carefully plan and familiarise yourself with the route before setting out. escape routes and contingency plans should be arranged in advance
出發前小心計劃行程及熟悉旅程路線，其中應包括中途撤走路線和交通安排。Approximately 10 minutes to guangzhou international convention and exhibition centre also known as pazhou complex of canton fair ; 45 minutes to baiyun international airport by airport express shuttle bus ; local ferry links panyu lianhuashan port and china ferry terminal in kowloon provides a fast and convenience alternative for cross boundary service between the mainland and hong kong
酒店地理位置優越，四通八達，前往位於琶洲的廣州國際會議展覽中心只需10分鐘車程酒店設有往返廣州新白雲國際機場的機場快線站點和售票點免費穿梭巴士服務前往蓮花山港接駁往香港的客船服務。Nowadays, the machining center carries through the precision inspection only following the fixed coordinates " axes, which can not completely reflects the real error of the spacial position of the practical machining outside the axes and leads to having no the directive relation between the inspected precision and the practical machining precision. so, this paper introduces that the error factors of influencing workpiece ' s outline on machining and carries out the solid inspection of every spot ' s error inside the workaround on the horizontal machining center
本文針對當前加工中心僅沿固定的坐標軸線進行精度（含幾何精度和定位精度）檢驗，並不完全反映軸線外實際加工的空間位置真實誤差，導致檢出精度與機床實際加工精度無直接對應關系的現狀，論述了加工時影響工件型面輪廓精度之加工中心的誤差因素，對加工中心實施其工作區內各點誤差的立體檢測。Abstract : approximate methods for calculating aerodynamic heating rates on space shuttles are discussed. various methods are given for predicting the heating rate at axisymmetric stagnation points, general three dimensional stagnationpoints and the leading edge stagnation point of wings. numerous laminar and turbulent heating techniques for flat plates and cones are analyzed and compared. a brief review of some methods is presented to predict heating rate for winward centerline and lateral direction off the symmetry plane. the results show that the methods are simpler and can guarantee enought precision for predicting aerodynamic heating environment of space shuttles
文摘:介紹了國內外預測航天飛機氣動加熱的工程計算方法.給出了軸對稱、非軸對稱和機翼前緣等各種外形駐點熱流密度的計算，分析和比較了平板、錐體的層流和湍流熱流密度計算的各種方法，概述了航天飛機迎風面中心線和離開中心線橫向熱流密度的計算.計算結果表明，本文方法用在航天飛機氣動熱環境初步設計中比較簡單並且有足夠精度Inspecting centerline positioning for shaft system and rudder system before boring
軸、舵系鏜孔前中心線定位檢查。The vibration of magnetism pole center in main and subsidiary generator could be deduced to the different order when the generator put into power system
主、副發電機磁極中心線與系統初相角前後不同，將使主、副發電機併入電網的順序不同。Center front line
前中心線The central suspension beam is always in axis with the front pier
中間吊架總是在前墩柱中心線處。分享友人