four-point 中文意思是什麼

four-point 解釋
四探針
  • four : n 1 四人小組；（套在車上的）四匹馬。2 四的記號；（骰子的）四點；（鐘點的）四時；四歲。3 〈pl 〉 ...
  • point : n 1 尖頭，尖端；尖頭器具；〈美國〉筆尖；接種針，雕刻針，編織針；小岬，小地角；【拳擊】下巴。2 【...
  1. The diffusion welding behavior of single - crystalline cu to single - crystalline - aio with a nb film interlayer and the joint microstructure properties were studied by tem, sem / eds analyses and four - point bend testing. the nb film interlayer deposited by electron beam evaporation on the ceramic side prior to diffusion welding was found to be olycrytalline and fiber - textured after diffusion bonding, with the close - packed plane ( 110 ) being parallel to the ( 0001 ) basal plane of - aio

    擴散連接技術是一門邊緣科學，涉及材料、擴散、相變、界面反應、接頭應力應變等各種行為，工藝參數多，雖然已經進行了大量的試驗研究，但卻對各種材料的連接機理尚未有明確的認識，為此人們試圖藉助于計算技術，對接頭行為進行數值模擬，以便找到共同規律，對擴散連接過程及質量進行預測與實時控制。
  2. By means of bending tests of three - point and four - point, complex fracture experiments were made for cast iron material with crack. the stress intensity factor and breaking direction angle of cast iron material were measured and compared with theoretical values. based on the research some useful conclusions are given for engineering design and application

    通過3點彎曲和4點彎曲實驗方法，對含有裂紋的鑄鐵材料進行復合型斷裂實驗研究，測試鑄鐵材料的應力強度因子、斷裂方向角，將實驗結果與理論值進行分析、比較，找出兩者之間的異同點，得到一些對工程設計及應用具有實際意義的結論。
  3. There is a professional showroom in our shenzhen office and we can provide the fastest handlooms and sample yardages service. we take american four point as our fabric standard, all of our fabrics must pass aatcc test before shipping

    我們均有專業的面料展廳和提供最快的打板服務，面料大樣由100碼起定，全部採用美國4分制全程驗貨。
  4. For rotor steel ( 30crlmolv steel ), the tests of low - cycle fatigue property are done under different temperatures. the fatigue life under different temperatures is researched to make up for the defects of the testing for foreign similar materials. when pull - stretch data is attempted to evaluate low - cycle fatigue data, the result shows that four - point associated method in middle - low life zone is done well under room temperature, but there are large errors of four - point associated method and general - slope method under other temperatures

    在本文中，通過與國外同類材料的性能進行比較，國產材料與國外材料共有的材料特徵基本相同；對轉子鋼（ 30crlmolv鋼）進行了不同溫度下的低周疲勞性能實驗，研究其在不同溫度下疲勞壽命，以彌補國外對同類鋼材測試的不足；採用拉伸數據預測低周疲勞壽命時發現，室溫條件下用四點關聯法在中低壽命區預測較好，在高溫條件下四點關聯法和通用斜率法都有較大誤差，需要進行改進。
  5. Rolling bearings - four - point contact ball bearings - axial internal clearances

    滾動軸承.四點接觸球軸承.軸向游隙
  6. The " four point system " project was launched in 1991, and until 2002, has made investment of 798 million yuan. the objective of the project is to strengthen the pastoral risk management capacity through building of fence, shelter, living house and oats planting and improving the overall livestock production condition in qingnan area. the herders should be the key stakeholders in the pastoral risk management project

    青南牧區「四配套」建設項目從1991年正式實施到2002年，總投資達7 . 98億元，是青南牧區防災體系建立的綜合技術推廣項目，主要以解決牲畜「溫飽」問題為主攻方向，走發展草業的路子，重點建設一批牧戶定居點、草原圍欄、人工種草、牲畜棚圈相配套的防災、減災基地，逐步實現該地區草地畜牧業的穩定發展。
  7. In this paper, river water quality prediction is integrated with water pollution control measures. two parameters, water environmental capacity and pollution index are selected for pollution control measures. the objective is achieved after the development of simulation model using one - dimensional advection dispersion equation. the model algorithm and computer program is an improvement over the existing water quality models, since the model solution involves four point implicit upwind schemes for water quality prediction and pollution control measures at each grid point. model simulation results the assessment of water environmental capacity that yield the acceptable and realistic pollutants concentration in order to maintain water quality objectives. the pollution and overall pollution index of the river is suggested for integrating number of contaminants variables into one index. study provides the mathematical and scientific procedure for water quality management. the new approach is helpful for the water pollution control and to study the impacts of waste effluents on the river system for strategic planning purposes

    本文將水質預測及水污染控制措施有機地結合，選取水環境容量和污染指數作為水污染控制的參數.這樣，一維對流-擴散水質方程的求解除就是實現本研究目的的關鍵.本研究採用的模型在現有的水質模型基礎上有所改進，因為其採用四點隱格式對水質進行預測，推求可接納污染物的環境容量值及為保證水質而限定的污染物濃度值，從而制定相應的水污染控制措施.為整體考慮各種污染物的情況，建議採用河流的污染指數進而推求綜合污染指數.總之，本研究為水質保護提供了科學的計算方法，該法對水污染控制及污水對河道水質的影響是實用有效的
  8. Abstract : in this paper, river water quality prediction is integrated with water pollution control measures. two parameters, water environmental capacity and pollution index are selected for pollution control measures. the objective is achieved after the development of simulation model using one - dimensional advection dispersion equation. the model algorithm and computer program is an improvement over the existing water quality models, since the model solution involves four point implicit upwind schemes for water quality prediction and pollution control measures at each grid point. model simulation results the assessment of water environmental capacity that yield the acceptable and realistic pollutants concentration in order to maintain water quality objectives. the pollution and overall pollution index of the river is suggested for integrating number of contaminants variables into one index. study provides the mathematical and scientific procedure for water quality management. the new approach is helpful for the water pollution control and to study the impacts of waste effluents on the river system for strategic planning purposes

    文摘:本文將水質預測及水污染控制措施有機地結合，選取水環境容量和污染指數作為水污染控制的參數.這樣，一維對流-擴散水質方程的求解除就是實現本研究目的的關鍵.本研究採用的模型在現有的水質模型基礎上有所改進，因為其採用四點隱格式對水質進行預測，推求可接納污染物的環境容量值及為保證水質而限定的污染物濃度值，從而制定相應的水污染控制措施.為整體考慮各種污染物的情況，建議採用河流的污染指數進而推求綜合污染指數.總之，本研究為水質保護提供了科學的計算方法，該法對水污染控制及污水對河道水質的影響是實用有效的
  9. However, because of the particularity that is hydraulic jump, before jumping, when water ' s froude number is less than four point five, the damping ratio is so low that energy dissipator ' s lower river produce serious flushing, so much so that it may threaten energy dissipation structure ' s safty

    然而，因為水躍本身又具有其特殊性，在躍前水流佛汝德數（ froudenumber ）小於4 . 5時，消能率很低，致使消能工下游產生嚴重的沖刷，甚至危及消能建築物本身的安全。
  10. The surface resistance and electromagnetic interference ( emi ) shielding effectiveness of the conductive fabrics were measured by four point probe method ( astmf 390 ) and the coaxial transmission line method ( astm d4935 - 99 ), respectively

    分別用四探針法和雙軸傳輸線法測量了導電滌綸織物的表面電阻和電磁屏蔽效能。
  11. Rolling bearings - three - point and four - point contact ball bearings - boundary dimensions

    滾動軸承三點和四點接觸球軸承外形尺寸
  12. Rolling bearings ; angular contact radial ball bearing, single row ; four - point contact bearing

    滾動軸承.單列向心止推球軸承.四點接觸滾動軸承
  13. Rolling bearings - angular contact radial ball bearing, single row - four - point contact bearing ; geometric and characteristic

    滾動軸承.單列徑向止推滾珠軸承.四點接觸軸承.第4 bb
  14. A report by an international mine workers union found four point two lives were lost per million tons of coal production in china in 2003

    一份國際礦工聯盟報告指出， 2003年，在中國每一百萬噸煤產量就有4 . 2個死亡人數
  15. Testing method of resistivity for silicon crystals and silicon wafers with four - point probe

    用四點探針法對硅晶體和矽片電阻率的測試方法
  16. Aluminium cell test for energy balance and its calculation method - four - point feed current and two - point feed current prebaked anode aluminium cell

    鋁電解槽能量平衡測試與計算方法四點進電和兩點進電預焙陽極鋁電解槽
  17. Carbonaceous materials used in the production of aluminium - prebaked anodes and cathode blocks - determination of flexural strength by the four - point method

    鋁生產用碳素材料.預焙陽極和陰極碳塊.用四點法測定抗彎強度
  18. Testing method for resistivity of conductive plastics with a four - point probe array

    用四點探針排列法測定傳導塑料電阻率的測試方法
  19. Test method for resistivity of conductive fine ceramic thin films with a four - point probe array

    用四點探針排列法測定傳導精細陶瓷薄膜電阻率的試驗方法
  20. Based on the saint - venant equations describing the channel flow movement, the nonlinear algebraic equations derived by the use of preissmann weighted implicit four - point scheme are solved with the netwon - raphson method, which raises the accurate of the numerical solution, and the convergence of the numerical solution is discussed, 2

    用newton方法直接求解按preissmann加權四點格式離散擴展形式的saint - venant方程組所得的非線性代數方程組，提高了數值解的精確性，並對數值解的收斂性進行了討論。
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