directional properties 中文意思是什麼
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The composites not only show excellent photo - responsive properties in the visible and near - ir region ( 450 ~ 850 nm ), but also show complementary and synergetic enhancement effects in photosensitivity in the visible and near - ir region. the reasons for the enhanced photoconductive properties and new effects are explained in terms of the partial and directional charge transfer from phthalocyanine to azo compound in these azo / tiopc composites. 2
研究發現這兩種復合材料體系在可見光區和近紅外光區（ 450 850nm ）均有光譜響應，光譜響應范圍得到了拓寬，並在該波長范圍內都有優良的光電導性能，呈現出明顯的光電導性能協同增強和互補效應，該復合材料體系中酞菁向偶氮發生的部分定向的電荷轉移是光電導性能協同增強和互補效應產生的物理起因。 -
The window inevitably imparts directional properties.
（計數器的）窗不可避免地具有方向性。 -
As the directional derivative defined in this paper does n ' t show convexity, when its properties are considered, it is necessary to search for new ways to reach the conclusion
本文定義的廣義方向導數在一般情況下不具有凸性，因而研究其性質時，要採用新的方法來得到類似的結論。 -
Let / be a function from rn to r. following the definitions of the generalized gradients proposed by clarke and xu yihong, respectively, we define the d - regular weak lipschitz function and propose a new generalized gradient as follows where d _ f ( x ; d ) is the directional derivative of / in the direction d at the point x, namely some properties are proposed
第二節引入基本定義和記號，在clarke和徐義紅提出的各自的廣義梯度的基礎上，定義了一類d正則弱l函數，且提出了一個新的廣義梯度。設f ： r ~ n r ，其廣義梯度為其中為f在處沿方向d的方向導數，即並給出了若干性質定理。 -
By analyzing the microstructure, the digitized cell model of three - dimensional four - directional composites is established, then the mechanic properties of three - dimensional four - directional composites are calculated by the digitized cell - based finite element method ( dcb - fem ), and the influence of the braiding angle and the fiber volume fraction is discussed
摘要在確立三維四向編織復合材料數字化單胞力學分析模型的基礎上，運用均勻化方法對三維編織復合材料的等效彈性性能進行了分析計算，並討論了編織角和纖維體積含量對此材料等效彈性性能的影響。 -
Evaluation of elastic properties of 3d 4 - directional braided composites
三維四向編織復合材料有效性能的預報 -
In this paper, an ingot of niobium - niobium silicide based in - situ composites ( rmics ) was prepared by arc melting process, and nb - nb3si / nb5si3 in - situ composites with a uniformly orientated microstructure were produced in a high temperature gradient directional solidification apparatus named electron beam floating zone melting ( ebfzm ). the relationships between the processing parameters and the characteristics of the solidified microstructure have been investigated. the influence of the microstructure on the mechanical properties has been revealed and the rupture mechanism at room temperature has been discussed
本文採用真空電弧自耗熔煉法制備了鈮?硅基rmics材料的母合金錠，並採用電子束區熔（ ebfzm ）高溫度梯度定向凝固裝置制備了定向效果良好的nb - nb _ 3si nb _ 5si _ 3共晶自生復合材料，並對其定向凝固工藝參數和組織之間的對應規律、組織特性進行了研究，探討了凝固組織對室溫力學性能的影響及其斷裂機制。 -
The mechanical properties on one - directional loading of two kinds of mixture ratio rpc materials with or without steel fiber and of hollow steel tubes were studied. three kinds of loading format were analogized and the working mechanism of rpc filled in steel tube short columns
應用優化配比后的活性粉末混凝土，試驗研究了摻與不摻鋼纖維兩種配合比rpc材料單軸抗壓性能並與普通高強混凝土相比較，試驗還研究了空鋼管的力學性能。
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