sectional center 中文意思是什麼
sectional center
解釋
地區中心-
For meeting the related nantional standards and avoiding demolishment of the building, the underpinning and strengthening methods are used, with which the loads of center column are underpined by the diagonal steel strut and the cross - sectional areas of side pillar are strengthened, both ends of shear wall are chiseled in turn and then concrete is poured again
通過採用斜向鋼支撐荷載轉移法實現對中柱的托換，採用剪力墻兩端分批鑿除后再澆搗實現對剪力墻的托換，採用增加截面法對邊柱進行加固，使建築物經托換和加固后能滿足國家有關規范的要求。 -
Considering that the characteristics of our country ' s highway tunnels are always of long spans, tabular and of various geometry, by means of thorough analysis of the different problems existed in the design of support structures of the tunnels at present, this paper pays special attention to the two key problems, optimization method of form selection of structural section of the tunnel as well as the stability and bearing capacity of the support structures, in the design of the long and large tunnel on high - class highway, introduces the simplified complex - form optimum method in the structure optimization theory, discusses the optimum design model of lining section of highway tunnel with satisfying demands in building clearance, ventilation and load conditions, puts forward an optimization method of form selection of three different kinds of lining sectional forms ( i. e. single - center circle, three - center tabular circle and three - center sharp circle ), establishes a complete set of systematic optimum design the ory and method of long and large tunnel on high - class highway, develops the corresponding computer software used on the planned xuefeng mountain highway tunnel on shaoyang to huaihua expressway in hunan province for optimization of form selections of the structural sections, and obtains a series of relatively reasonable structural design parameters
本文針對我國公路隧道多為大跨度、扁平、幾何形狀呈多樣化的特點，通過深入分析目前隧道支護結構設計中存在的各種問題，抓住高等級公路長大隧道設計中隧道結構斷面的優化選型及隧道支護結構的穩定性與承載能力兩個核心問題，引入結構優化理論中的簡易復合形優化方法，深入探討了滿足建築限界、通風條件、受力狀態約束等條件下公路隧道襯砌斷面優化設計模型，提出了三種襯砌斷面形狀（單心圓、坦三心圓和尖三心圓）的優化選型方法，建立起一套完善的高等級公路長大隧道的系統優化設計理論與方法，並開發出相應的計算機程序，用於擬建的上海至瑞麗國道主幹線湖南省邵陽至懷化高速公路雪峰山長大高速公路隧道的結構斷面優化選型，得出了一系列較為合理的支護結構設計參數。 -
Tianjin yingchen precision tooling & mould co., ltd. founded in june 6, 2001, located in tianjin, sectional center of the economic area encircling the bohai sea of north china, is a processing trade enterprise engaging in production of precision injection mould, hardware die mould and components of precision mould as well as manufacturing of standard mould parts and sales service
天津市英辰精密模具有限公司成立於2001年6月，坐落於中國華北環渤海經濟區中心城市天津市，是專業從事精密注塑模具、五金精密沖壓模具設計製造、精密模具零部件，模具標準件加工製造及精密沖壓與精密注塑生產加工和銷售服務的加工貿易型企業。 -
A cross - sectional correlational study was conducted by interviewing 50 patients with structured questionnaire in a medical center in northern taiwan
采橫斷式相關性研究設計，以結構式問卷訪談北部某醫學中心50名乳癌手術病人。 -
In this paper, we estimated the magnitude and the proportion of the aged poor population by rural and urban and by provincial - level category in shandong, based on the fifth national census and the " china cross - sectional rural - urban elderly sample survey " conducted by the china aging research center in december 2000
摘要本文利用第五次人口普查數據和中國老齡科研中心於2000年12月組織的「中國城鄉老年人口狀況一次性抽樣調查」數據，經過加權處理后對山東、以及山東分城鄉的貧困老年人口的比例和數量進行了估計。 -
Obtain employment direction is as follows : it of middle and primary school teachs the teacher and student that reachs relevant course ; information of stage of house of various education with electrical audiovisual aids, broadcasting television, school ( network ) the technology of the branch such as the center and government work ; enterprise or business design of sectional computer management, website, advertisement design and news conduct propaganda ; the network course that teachs a website company of long - range education software, remotely, the design of classroom of multimedia education platform, network, make etc
就業方向如下：中小學信息技術教育及相關課程的教學；各級電化教育館、廣播電視臺、學校信息（網路）中心等部門的技術和治理工作；企事業部門計算機治理、網站設計、廣告設計及新聞宣傳；遠程教育軟體公司、遠程教育網站的網路課件、多媒體教育平臺、網路課堂的設計、製作等。 -
Skin effect is the tendency for alternating current to flow near the sruface of the conductor in lieu of flowing in a manner as to utilize the entire cross - sectional area of the conductor. this phenomenon causes the resistance of the conductor to increase. the magnetic field associated with the current in the conductor causes eddy currents near the center of the conductor which opposes the flow of the main current near the center of the conductor. the main current flow is forced further to the surface as the frequency of the alternating current increase
表面疚是指交流電流較傾向于導體的表面傳導而非流經整個導體截面的趨勢，這些現象會造成導體的電阻提高，與導體中的電流有關的磁場在導體中心部位產生過電流而阻礙了中心部位的主要電流，當交流電的頻率增加時，主要電流的流向會進一步被推擠到導體表面。
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