tn-a 中文意思是什麼

tn-a 解釋

  • tn : Tn ＝【化學】thoron; train. tn ＝ ton.
  • a : an 用在以母音音素開始的詞前〉 indefinite art 1 〈普通可數名詞第一次提到時，冠以不定冠詞主要表示類...
  1. Asset of 4580, 000 yuan, and employs a highly qualified staff of 82 including technical specialists with medium or senior professional titles. our main products, e. g. gap serial microvacuum - nonpressure filling machine, cb80 - 8 automatic linear filling machine, tn60c tn100a adhesive brander, fx - 8 multi - functional auto cap covering machine, tn 150 adhesive label brander etc., have obtained 3 national patents, and have passed the evaluation and authentication of gangs technical monitoring bureau with the authoritative no. y96f2606 - 32

    微電腦全自動灌裝機智能化稱重灌裝機注射式灌裝機微真空常壓灌裝機低真空灌裝機直線式灌裝機多功能旋蓋機直立式旋蓋機螺紋封口機粘合式貼標機不幹膠貼標機全自動袋裝粉劑包裝機全自動袋裝水劑包裝機進瓶機輸瓶機裝箱臺及塑膜收縮機
  2. The dynamic change of nh4 +, no3 - and tn, under the situation which urea was applied in the high fertility paddy - field in yuhang of hangzhou city with a lysimeter which was designed and made by ourselves, was studied and analyzed in order to find the rules of the change in the water - body of surface and the leakage rule of nitrogen, to reduce the effect of nitrogen loss on the water pollution

    藉助自行設計製作的稻田滲漏計，在杭州餘杭對高肥力稻田不同施用尿素氮肥情況下，稻田地表水和滲漏水中銨態氮、硝態氮和總氮（簡稱三氮）的動態變化規律進行了研究分析，以利於發現氮素在地表水體變化和淋失規律，盡量減少氮素淋失對地下水體所造成的影響。
  3. At last the learning method for conditional probability distribution is investigated. * the congestion computing of tn and simulation in this paper a special stochastic process is studied and applied in telephone < wp = 7 > switch system. the congestion principle is analyzed from link system, telecommunication network and switcher

    *電信網阻塞計算方法及模擬本文研究了增消隨機過程及在電話交換系統中的應用，並從鏈路系統、電信網路及交換機等方面分析了電信網產生阻塞的機理並推導了阻塞計算方法。
  4. Through the water quality analysis on the cod tp, tn in the irrigation water and drainage water in a model experimental field, the regulation and its influence on environmental water pollution by the drainage water was also studied

    通過對蕭山聞堰鎮某二季晚稻試驗田灌溉用水和農田排水的逐次記錄和取樣分析，研究了農田退水中cod 、 tp 、 tn的排放量和排放濃度變化，以及農田退水對本地水環境的影響。
  5. Have been suggested. given a contingency table whose cells are numbers of parents who either do or not transmit the associated marker alleles to affected children, t compares every symmetric pairs, both tn and t compare row and column total for every marker allele. tm uses all cells but t uses non - diagonal elements only

    給定一個列聯表（其元素為傳遞或未傳遞某種等位基因給生病小孩的父母的個數） ， tc比較列聯表的每一個對稱的部分， tm和tmhet均比較其相應的行和與列和，但tm用到了表中所有的元素，而tmhet只用了非對角元素。
  6. However, if the growth period is one month - ahead of the present schedule, it will save 100 million m3 of water withdrawal in hangzhou. 5. the concentrations of tp, tn in drainage water respectively have a peak value and a 40 - days stable period

    農田排水中的tn 、 tp濃度變化均有一個峰值和40天的穩定期，建議在高濃度污染物出現期間控制農田排水或考慮高濃度排水進行回灌。
  7. Rcd electrical safety in low voltage distribution systems up to 1 kv a. c. and 1, 5 kv d. c. equipment for testing, measuring of monitoring of protective measures. part 6 : residual current devices in tt, tn and it systems

    最高可達1 kv交流電和1 . 5 kv直流電的低壓配電系統中的電氣安全性.試驗測量或保護測量監測用設備.第6部分: tt tn和it系統用殘流設備
  8. Engineering drawing has always been labeled as a practical subject. a combination of geometrical, building. mechanical and electrical drawing, it relates between theory and the picture of reality. engineering drawing will provide an accurate and complete ptcture for every object tn terms of shapes and sizes. usually, it is taught using the face - to - face teaching mode even in an odl environment. due to its nature, some students may find difficulty in imagining and interpreting the drawings. however, the availability of sophisticated technology provides the opportunity for the learning of engineering drawing to be enhanced via online. a web - based system for teaching and learning engineering drawing was developed based on a constructivism model. the web - based system is tailored for several topics of engineering drawing such as orthographic projection, sectional view, isometric and oblique drawing at the secondary level. the learning strategy consists of multiple phases beginning with introduction, concept learning, engineering drawing method, application and exercises. during introduction, students will be exposed to an overview of the topic followed by learning of specific concepts. the system provides a learning environment that allows engineering students to view objects from different angles, such as third angle projection and first angle projection as well as views of plans, side and front elevations. after learning about the concepts, students wilt be guided through the various steps in drawing methods for each topic via animations and simulations. learners are able to view any section repeatedly. examples of real application of engineering drawings were also given using graphic, animations and video. to evaluate students understanding, exercises were given at the end of each session

    工程制圖一直被認為是一門實踐性學科，其整合了幾何學、建築、力學、電子制圖等，從而將理論與現實圖像聯系起來，工程制圖能為每個不同形狀、尺寸的物體提供精確的、完整的圖像.通常，即使在開放與遠程教育環境中，工程制圖的教學也是通過面對面的教學模式來進行的.由於其特殊性，一些學習者可能難以想象並解釋這些圖像.然而，尖端的技術使得可以通過在線的方式加強工程制圖的學習.研究者基於建構主義模式開發了一個面向工程制圖教學和學習的網路系統.該系統適用於幾種工程制圖，例如展開圖、刻面圖、等角圖和斜角圖.學習過程包括導論、概念學習、工程制圖方法，以及應用與練習等階段.在導論階段，系統為學習者提供了專題簡介，然後是概念學習階段.系統所提供的學習環境允許工程專業的學生從三維透視、一維透視、平面圖、側立面、正立面等不同角度來觀察物體.經過概念學習階段后，系統將引導學生通過動畫和模擬學習每個專題中制圖方法的不同步驟，學習者也能重復觀察任何剖面.另外，還通過圖像、動畫和視頻等方式展示真實的工程制圖應用案例.最後，為了評價學生的理解能力，在每部分內容後面都附有相關的練習
  9. Free trade zone is 31 km away from, in the south, tsimshatsui, kowloon of hong kong, 30 km from kuiyong dock, in the east 10 km from luohu railway station, shenzhen, 30 km from yantian port : in the west 25 km from mawan. shekou port. tn ttie northwest it is 3o km away fom huangtian airport, shenzhen, and there is a special path by guang - shen highway connecting with it

    保稅區南至香港九尖沙咀31公里，葵涌貨櫃碼頭30公里，東至深圳羅湖火車站10公里，至鹽田港30公里，西至媽灣蛇口港公里，西北至深圳黃田機場30公里，並經廣深高速公路設有專用通道與之相連，保稅區建有封閉的一號專用通道與香港直接相連。
  10. However, except nitrate, the nitrogen concentration including nitrite, ammonia, don, pn and tn in spring 1998 were higher than those in autumn 1997, with the average concentration of 4. 9714. 65, 0. 67 ?. 20, 0. 7210. 30, 9. 2516. 88, 7. 3014. 42 and 22. 9 ? 0. 2 mol / dm3 in autumn, and 4. 5812. 39, 0. 70 + 0. 14, 2. 2611. 05, 9. 8814. 92, 7. 8816. 21 and 25. 318. 94 mol / dm3 in spring, respectively. the n / p ratio in autumn 1997 was 13. 217. 54 in average which a little lower than redfield ratio, nevertheless in spring 1998 the value was as high as 25. 6113. 0, much hi gher than redfield ratio. there shows a clear seasonal variation of phosphorus structure in two seasons, but the nitrogen structure almost unchanged

    兩個季節海水中磷的結構變化明顯，秋季磷主要以pp （ 54 ）為主，而春季長江口營養鹽、石油烴對海洋生態系統影響及動力學研究主要以po4一p （ 51 % ）為主;兩季節氮的結構基本一致，溶解氮都以don為主，分別為40 %和39 % :秋季no3一n比例較春季略高（ 22 % ） ，而春季nh4一n比例較秋季略高（ 9 % ） 。
  11. Tn its applications, a simulative system based on rfb fuzzy neural network is accomplished for predicting product rate of catalytic cracking

    在其應用上，研製了基於徑向基函數的模糊神經網路的催化裂化產品產率預測模擬系統。
  12. Fourthly, based on the principle of gradual transitivity of variables and the principle of minimizing exogenous variables, the author sets up a macroscopic simultaneous equation model named " tn mac model "

    四是以「因變量向自變量遞歸傳遞原則」及「外生變量最少化原則」為基礎，建立了基於內外貿易和需求的宏觀經濟聯立模型? ? tn ? mac模型。
  13. The main difference between tn type and stn type lies in the twisted angle. tn lc. has a twisted angle of 90 while stn lc s twisted angle can have 90270

    Tn和stn在結構上的主要不同為液晶分子的扭曲角， tn的扭曲角為90 ， stn的扭曲角為90 270 。
  14. Rcd electrical safety in low voltage distribution systems up to 1000 v a. c. and 1500 v d. c. equipment for testing, measuring or monitoring of protective measures - residual current devices in tt, tn and it systems

    不超過交流1000v和直流1500v低壓配電系統電氣安全性.防護用試驗測量或監測設備. tt tn和it系統用殘余電流裝置
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