環形焦點 的英文怎麼說

中文拼音 [huánxíngjiāodiǎn]
環形焦點 英文
a ular focus
  • : Ⅰ名詞1 (環子) ring; hoop 2 (環節) link 3 (姓氏) a surname Ⅱ動詞(圍繞) surround; encircle;...
  • : Ⅰ形容詞1 (物體受熱失去水分 呈現黃黑色並發硬、發脆) burnt; scorched; charred 2 (著急) worried;...
  • : Ⅰ名詞1 (液體的小滴) drop (of liquid) 2 (細小的痕跡) spot; dot; speck 3 (漢字的筆畫「、」)...
  • 環形 : annular; ringlike; ring form; bight; annularity環形癌 annular carcinoma; 環形電路 [訊] loop circu...
  • 焦點 : 1 [數學] [物理學] (二次曲線焦點; 主焦點) focal point; focus 2 (問題的關鍵所在或爭論的集中點) ...
  1. The thesis targets the two focused issues existing in project construction management and construction managemeflt rehabilitation structure in the course of curreflt economy system tyansit stage of the water resources sector starting from history cun. ent status, domestic and overseas project management experience, with combination of theories of modem management science, the paper explains the construction management system of water resources projects, in particular the execution plans of project legal person responsibility system ; on the basis of environment and mandatory mission analysis of water resources project construction management units, the paper demonstrates organization smicture design and operation management mechanism of consmiction management units

    本文以當前水利行業經濟體制轉軌過程中出現和存在的項目建設管理體制與建設管理治理結構這兩個問題為研究對象,從歷史、現狀、國內外項目管理的實踐入手,結合現代管理學理論,論述了水利項目的建設管理體制,尤其是項目法人責任制的實施方案問題;同時,從水利項目建設管理單位的境、使命分析入手,著重論述了建設管理單位的組織結構設計、運行管理機制等問題,尤其在建設管理單位職能部門的成分析、各種組織結構式的具體適用與選擇、內部管理的規章制度、外部管理功能的實現途徑、建設管理單位的監督機制等方面做出了有益的探索。
  2. A calculation method and calculation results that show that a new kind of shaped paraboloid antennas can produce a ringy radiation pattern is presented

    摘要通過數值計算發現:將拋物線繞通過的非拋物線對稱軸旋轉而成的賦拋物面天線可產生狀的方向圖主瓣(此主瓣指的是主瓣最大值處) 。
  3. Especially, when the isocline of x is monotone decreasing in 0 < x < 1, the svstem has no limit cycle and is globally stable ; next, we construct a saddle bifurcation at the boundary equilibrium and a degenerated bogdanov - takens bifurcation at the interior equilibrium by choosing appropriate parameter values in the following two sections, where our work are based on the theory of central manifolds and normal torms. we prove that is a codimention 3 focus - type equilibrium. system ( 6. 1 ) will have two limit cycles at some appropriate bifurcation parameter values, and have homoclinic or double - homoclinic orbits at some other appropriate bifurcation parameter values ; at last, we study the qualitative properties of the system at infinite in the poincare sphere

    因為系統在( 0 , 0 )處沒有定義,這給研究其在( 0 , 0 )附近的動力學性質帶來了困難,我們應用文獻[ 17 ]中關于研究非線性方程奇的系列理論和方法,圓滿解決了這一問題,給出了第一象限內當t +或t -時,在全參數狀態下系統的軌線趨于( 0 , 0 )的所有可能情況,其相圖也得以描繪;並且,系統不存在極限的幾個充分條件我們也予以列出,當x的等傾線在0 x 1范圍內遞減時,系統不存在極限,全局漸近穩定;然後,我們以中心流定理和正規型方法為主要工具,巧妙選擇參數,分別構造了一個余維2的鞍分岔和一個余維3退化bogdanov - takens分岔,證明了平衡是余維3的型平衡,存在參數, m ,的值使得系統( 6 . 1 )有兩個極限,還存在參數, m ,的另外值使得系統( 6 . 1 )有同宿軌或雙同宿軌。
  4. In chapter 3, by using theoretic analysis the focusing properties of an ideal annular beam is demonstrated. the intensity distribution near the focal point is given explicitly to show the influence of the ratio of inner to outer radius

    第三章,從理想的光束出發,先在理論上分析了光束在附近的光強分佈情況和光束內外徑之比(占空比)對聚性質的影響。
  5. Early in 19 century, the recovery of injured nerve lacking appropriate1 material made people to attempt conduit to recover the injured nerve. recently, a lot of people focusing on the study of nerve conduits, because some scholars believe that, from the research during the recent 10 years, nerve conduits are more suitable than general nerve anastomoses and nerve migration, especially the nerve regeneration chamber can provide a perfect " window " to study the micro circumstance of nerve regeneration

    早在19世紀,神經損傷修復缺乏合適的縫合材料便引發了人們使用導管修復神經的設想。近10年來由於部分學者相信導管修復最終會優于通常的神經吻合和神經移植,特別是近年來神經導管成的神經再生室為研究神經再生的微境提供了理想的「窗口」 ,從而使神經導管的研究迅速成了目前人們研究的
  6. Since the k - gorenstein property of ring r x m is an important aspect in the research field, in the first chapter, we have got an equivalent condition for r m as a k - gorenstein ring by study the injective resolution of ring r m. the dimensions of rings is one of the most important parts in homological theory

    在第一章,我們通過對r ( ? ) m內射分解的考察得到了r ( ? ) m成為k - gorenstein的一個充分必要條件:維數的研究是同調理論中的核心部分,伴隨同調理論的成,它便一直成為同調代數中研究的
  7. Based on the qualitative theoy of differential polynomial system, algorithm to calculate the focal values, the construction of small amplitude limit cycles, hirsch ' s monotone theory and the center manifold theorem etc, we apply mrealroot algorithm to many problems, such as to obtain the real solutions of polynomial systems, to confirm the number of limit cycles in differential system and to construct the limit cycles

    結合平面微分多項式系統的定性理論,計算量的演算法,小擾動極限的構造, hirsch的單調性理論和中心流定理等, mrealroot演算法在大量具體問題,包括實根分佈、小擾動極限個數以及高維系統極限構造等方面都有廣泛的應用
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