b-cam 中文意思是什麼
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Optimization of cam contour by b - spline curve
樣條曲線優化設計凸輪廓線 -
Bezier, b - spline, and their rational models play an important role in cad / cam systems. but these models show obvious shortcomings, such as no encompassing transcendent ( i. e., nonalgebraic ) curves, e. g. the circle, the cycloid, the catenary and the hyperbolic helix
B zier ， b -樣條以及它們的有理模型在cad cam系統中有著非常重要的地位，但是這些模型也有著明顯的缺陷，譬如不能精確表示很多非代數曲線，如圓弧，擺線，懸鏈線，雙曲螺線等 -
Cluxtalx analysis indicated that the v - h + - atpase b, h and c subunits from halophyte s. salsa had high amino acid sequence identity with subunits from mesembryanthemum crystallinum, which is an inducible cam species as its growth rate is maximal at moderate salt concentrations. sequence alignment results suggested that the evolutions of v - h + - atpase subunits b, h and c were involved in environmental adaptation and these subunits of v - h + - atpase might have an important role in responses of plants to salt stress
Clustalx分析表明鹽地堿蓬液泡膜h ~ + - atpaseb 、 h 、 c亞基氨基酸序列與來源於兼性cam植物冰葉日中花液泡膜h ~ + - atpase的相應亞基具有最高的序列一致性，表明植物液泡膜h ~ + - atpaseb 、 h 、 c亞基的進化可能與環境刺激有關並且可能參與了植物對鹽脅迫的響應。 -
The methodology adopted by most existing cam / cnc systems, which uses huge amount of linear segments to approach the original shape and make linear interposition increases the cost of memory size and communication work of the cnc system tremendously. a new approach based on cubic polynomial and b spline interposition to rebuild the cam generated tool path under real time condition is presented in the paper. applications on cnc machine tools showed that the presented approach improves the machining accuracy and increases the cutting speed significantly
目前大多數cam / cnc系統採用大量小直線段逼近原始曲線和直線插補的做法，只能獲得零階連續的走刀軌跡，逼近精度低，不能保證高速加工運動的平穩性，因而加工精度、光潔度和加工速度都難以提高；由小直線段構成的nc代碼數據量龐大，也增加了數控系統在內存容量和數據傳輸方面的成本。 -
B / s mode is adopted and the realization of functions is assigned between server and browser. several key technologies including transmission protocol, dynamic display technology, collaborative mechanism, collaborative interplay, data transmission protocal, graphics display, data storage, safty and fault tolerance of web - based collaberative are researched. cosuperman, a prototype of web - based collaberative cad / cam system is realized
本文還對基於web的cad cam協同系統開發過程中的若干關鍵技術進行了研究，主要包括服務器與瀏覽器的傳輸協議、模型動態顯示、協同機制、協作交互模式、文件存取、安全及容錯等，在此基礎上用java技術基於acis平臺實現了一個基於web的cad cam協同系統原型? cosuperman 。 -
The tri - polar cells were induced by cytochalasin b treatment, by using the tri - polar cell model, it ' s quite convenient to compare the difference of central spindle structure and the difference of cam distribution pattern between each two poles in the same cell ; moreover, it ' s easy to see whether these differences would affect the furrow formation
2我們採用cytochalasinb處理法獲得三極細胞，應用三極細胞模型，在同一個細胞中比較每兩極之間中區紡錘體結構的差異， cam分佈的差異對最終分裂溝形成的影響。 -
Up to now, the effects of uv - b radiation on organisms have been studied extensively. however, the investigated materials in these studies were mainly c3 plants, some were c4 plants, few cam plants were explored. furthermore, most of these studies were conducted indoors with strictly controlled conditions, and the conclusions from these studies have many inconsistencies
國內外學者已對uv - b輻射的生物學效應做了廣泛的研究，但其研究對象多集中在c _ 3植物，也涉及部分c _ 4植物，以cam植物為研究對象的研究更為少見，且多數實驗是在室內控制條件下進行，而且研究結果也存在許多不一致。
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