positive curvature 中文意思是什麼
positive curvature
解釋
正曲率-
The manufacture system of filament winding ( fw ) and fiber placement ( fp ) is the one of advanced equipment for frp products. it can be used to produce the products of the positive curvature gyration bodies, such as container cylinder, oil tank, tube, orb, cone, assembled body and so on. furthermore, it is more suited to machining some products of the complex bodies such as the surfaces of the negative curvature gyration bodies, the shell components which have slots and reinforced tendons
纖維纏繞/鋪放聯合製造系統是纖維增強塑料（ frp ）製品生產的先進製造裝備之一，可用於製造如圓筒容器、儲罐、管、球、錐形體或組合形體等正曲率回轉體的製品，更適用於製造含有負曲率的回轉體表面、具有深槽、加強筋的殼體構件等外形相對復雜的纖維增強塑料製品。 -
Lots of concrete examples are (, ) - metrics. and one of fundamental problems in finsler geometry is to find and study finsler metrics with constant ( flag ) curvature. on the basic, we majarly study the following problems in present paper : ( a ) to the property of a class of (, ) - metrics in which is parallel with respect to riemann metric a and riemann metric a is of constant curvature, we obtain the following theorem4. 3 let f (, ) be a positive definite metric on the manifold m ( dimm > 3 )
在finsler幾何中，我們現在已知的finsler度量已經很多了，但大多數具體的例子主要都集中在（ ， ） ?度量中，又在finsler幾何中一個基本的問題就是去發現和研究具有常曲率的finsler度量，基於這些本文主要研究了以下一些問題： （ a ）一類關於是平行的並且riemann度量具有常曲率的（ ， ） ?度量的特殊性質，得到了如下的定理4 -
And then, in this part, following the idea of topping [ 51, 52 ], we will show an isoperimetric inequality ( 6. 3. 1 ) on surfaces of non - positive gaussian curvature by means of the curve shortening flow on surfaces, this inequality can be considered as a generalization of the banchoff - pohl inequality in the euclidean plane
然後，仿照topping [ 51 ]和[ 52 ]利用平均曲率流證明等周不等式的想法，我們利用曲面上的曲線縮短流在gauss曲率非正的曲面上證明了一個等周不等式（ 6 -
Because the data mutate on the position that is the edge, the normal curvature on some orientation changes from positive to negative. so it is thought whether some point is judged the edge - point by this character
由於邊緣是圖像上像素發生突變的位置，所以在圖像曲面上某一方向的法曲率值會出現由正到負的變化，故此應用這個性質來判斷曲面上某點是否為邊緣點。 -
Also, general relativity defines non - inertia space - time as a space of riemann. for riemann space has positive curvature, we have to doubt about where the minus curvature space is
廣義相對論把非慣性時空定義為黎曼空間，但由於黎曼幾何是正曲率空間，既然廣義時空是對稱的，我們必然要問，負曲率空間到哪去了？ -
Under this flow, the convex initial curve will preserve its perimeter, enlarge the enclosed area and make its curvature to be positive definitely. and as the time lasts, it will become more and more circular, and finally, as the time goes to infinity, the curve will converge to a circle in the hausdorff metric
本文證明在這種新的曲線流之下，閉凸曲線周長保持不變、所圍區域的面積不斷增大而曲率保持恆正（從而保持凸性） ，並且，隨著時間的推移曲線變得越來越圓，最終當時間t趨向于無窮大時，曲線在hausdorff度量意義下收斂到一個圓周。 -
Could it be said that god favors positive curvature
難道上帝對正曲率空間有偏愛？ -
Geometric rigidity theorem for submanifolds with positive curvature
正曲率子流形的幾何剛性定理 -
The exponent of each item was discovered based on the optimizing the diagram factor, minimum radius of the cam curvature, maximum positive and negative accelerations of valve
對于每一項的指數，則採用對氣門運動加速度、豐滿系數、最小曲率半徑等優化的方法來尋求。 -
( 2 ) there is no difference between the two groups in the positive of sciatica, spine curvature, lumber spine tenderness, sensation abnormality
（ 2 ）兩組間的下列指標差別無統計學意義:坐骨神經痛、脊柱側彎、腰椎壓痛、感覺異常。
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