speed-change area 中文意思是什麼
speed-change area
解釋
加寬超車區-
When temperature changed, in order to keep the outlet temperature of the cooling water stable, we can change the areas of draught deflectors, so the speed and area of the draught is changed, which will improve the safety and economy of the running assembling sets with the assumption of economizing water in winter
當外界溫度發生變化時，為保證出塔水溫不發生變化，可通過改變擋風板面積的方法，使進風口面積及進塔風速發生改變，進而保證出塔水溫，保證冷卻塔在冬季的正常運行。 -
Vehicles must not exceed the average local speed limit and must stop in a deserted area or along the roadside under surveillance every two hours to rest, and change drivers every three hours
一除不得違反道路行車速率外，行車一至二小時，應停車于曠野路旁休息，並施行警戒，行車四小時以上，應停車更換駕駛人。 -
The optimum inclination angle is between 15 ~ 20, the length of thermosyphon will not change the phase - change heat transfer coefficient of the evaporation section and the condensation, which will enlarge heat transfer area of thermosyphon and increase the heat exchange capacity. the head - on speed of wind only stranger the heat transfer of the evaporation section and the condensation section. the experiment shows that the mathematic model closely fits to the thermosyphon, moreover, the one key to resolve the thermosyphon effect lies in decreasing the thermoresistance of evaporating section and condensation section. this study can provide directions and experience in the future research
傾斜角越大，熱虹吸管總熱阻越大，最佳傾角在15 20之間;充液率過多或過少都會對傳熱性能產生不利影響，對于本實驗採用的1 . 75m 、 2m 、 2 . 5m 、 3m熱虹吸管，最佳充液率在20 % 35 %之間;管長對傳熱也有影響，管長不改變熱虹吸管蒸發段和冷凝段的換熱系數，只增加了熱虹吸管的換熱面積，增大換熱量;迎面風速的大小，起到強化熱虹吸管蒸發段和冷凝段換熱的目的。 -
Since the suggested method makes a significant improvement in wind speed, it is more suitable for wind field estimation over complex terrain than other methods which only concerns the effect of distance. then we calculate the wind change with evaluation, last we can conclude the wind abase the hilly terrain, we find the wind in westward and center plain is much smaller than other area. while the wind in northward hilly area is much bigger with the hilly arising. the wind of chongqing is the biggest period in spring ( april ), the smallest period in winter ( january ), the wind in summer ( july ) is bigger than its in autumn ( october )
本文利用重慶及其周邊地區的常規氣象站的1951 ? 1980年30年的風速平均資料，針對復雜地形風速診斷，以地理信息系統為數據處理平臺，根據重慶1 ： 25萬dem數據，來獲得重慶市實際復雜地形的高程，提出了一種適合於起伏地形的權重內插方法，通過引入一個表示地形起伏變化程度的因子，構造了一種新的權重函數，來處理復雜地形上的風速，通過與只考慮距因素同反平內插方法比較發現，本方法更適合在起伏地形條件下使用；然後根據經驗公式在地形上進行計算，得出重慶地區起伏地形下的風速分佈；得出重慶市的西部、中部平原地帶風速較小，而北部山區隨海拔高度升高風速也較大；重慶市風速最大時期為四月份，冬季一月份最小，夏季（七月份）大於秋季（十月份） 。 -
Both absolute difference and relative difference among per capita gdps of 14 cities ( prefectures ) increased year by year since 1990 - the absolute difference increased linearly - - and this increased tendency would n ' t change in short period. by counting the discrete and ratio between per capita gdp of every city ( prefectures ) and that of the total province, the relative development speed of every region and the industrial structure of every region, i think that the characteristic of the spatial structure of regional economic difference in hunan is that the area along the beijing - guangzhou railway line in the east of hunan developed fast, while the vast area in the west of hunan developed slowly, so the regional difference increased constantly. on the difference background between the east and the west of hunan, there is the difference between central region and fringe region, for one thing it shows ring difference, namely chang - zhu - tan internal ring, surrounding chang - zhu - tan medium ring, the outermost external ring, the most underdeveloped counties lie on the fringe and mountain regions in the west, south and east of hunan, for another it displays that the peripheral regions of 13 prefectural cities are more developed than the other
文章還建立了反映基礎設施水平、經濟發展水平、社會發展水平的23個主要指標構成的湖南省區域差異衡量指標體系，在此基礎上，藉助spss統計分析軟體，運用主成分分析法，對湖南省14個市州經濟發展綜合水平的差異狀況進行了研究，結果表明：長沙市的經濟發展綜合水平在14個市州中遙遙領先，反映了湖南省經濟發展空間結構的「單極主導」特徵；通過計算人均gdp的標準差和標準差系數，研究區域經濟差異的總體水平及區域經濟不平衡發展的演變趨勢，發現90年代以來湖南省各市州人均gdp的絕對差異和相對差異都在逐年擴大，其中絕對差異隨年份直線上升，且這種差異擴大的趨勢在短期內難以改變；通過計算各市州人均gdp與全省人均gdp的離差和比率、各市州發展速度的差異及產業結構的差異，認為湖南省區域經濟差異的空間特徵是：湘東京廣沿線地區基礎較好，發展較快，湘西地區發展緩慢，地區差異不斷擴大；通過以縣為對象的差異研究發現在湘東湘西差異的大背景上還有核心區與邊緣區的差異，它一方面表現為長株潭內層、圍繞長株潭的中層、更遠的外層的圈層差異特徵，最落後的縣分佈於湘西、湘南、湘 -
The key issues in this paper are : e - commerce and its characters ; the influence of e - commerce on the innovation of circulation model and the development of circulation industry ; the inner factors and impetus that speed up the circulation to develop itself ; the analysis of e - commerce in china and its electronic trade prospect and it is put forward that the development of e - commerce in china is facing the tasks of marketization and eletronisation and the business between enterprises is becoming the development emphasis in the area of commodity circulation ; the strategy and countermeasure of e - commerce development in circulation industry and it is also proposed that t he overtaking strategy be established to quicken the process of the modernization of circulation industry ; the rule that fits the situation of our country be fixed to make enterprises the main body in using e - commerce ; e - commerce means be used to change the circulation system of our country ; the payment system construction be speeded up and the government promote e - commerce, etc
本文重點研究了電子商務的本質特徵，電子商務對流通方式創新以及流通產業發展的影響，力圖從全新角度探求加速流通自身發展的內因和動力；分析了我國電子商務及其電子交易前景，提出中國電子商務發展面臨市場化與電子化的雙重任務，企業間的業務將成為商品流通領域發展重點；探討了流通業電子商務發展的戰略與對策，提出確立趕超型戰略，加速商品流通業現代化進程；確定適合國情的指導原則，推動企業成為電子商務應用的主體；用電子商務手段，改造我國物流體系；加快支付系統建設和政府對電子商務的推動等觀點。 -
Successful change of agricultural surplus labor of china is the core of solving the matter of agriculture, rural area and farmer, which perplexed us for a long time. at the same lime, it is not only the key to speed up industrialization of our country, but also the symbol of social progress and national richness
中國農業剩餘勞動力的成功轉移是解決困擾已久的農業、農村及農民等「三農」問題的核心，是加速工業化進程的關鍵，是國家富強和社會全面進步的標志，所以，對其研究必然產生深遠的影響。
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