keystone 中文意思是什麼

Internal combustion engines - piston rings - keystone rings

內燃機.活塞環.梯形環

Extraction at berkeley of a keystone from a tile on the stardust cometary dust collector

在伯克利進行的從「星塵」號彗星塵埃收集器中提取楔石。

Belief in a life after death is the keystone of her religious faith.

她的宗教信仰的基礎是相信死後有來生。

Quantitative measurements of one sort or another serve as the keystone of engineering practice.

定量測定一種或多種成分是環境工程中的重要項目。

Chapter four and five is our keystone of the paper

第四章和第五章是本文的重點。

The second part is the keystone of this article

這是論文的重點論述部分。

The keystone to any marriage is one word : “ we ”

任何婚姻的基石只有兩個字: 「我們」 。

The fourth chapter is the keystone of the paper

第四章是本論文的重點。

Enriching the people - the keystone of administration thought in qi

齊國治國思想的基石

Chapter three and four are the keystone of this paper

第三章和第四章是本文的重點章節。

Communication is the keystone and difficulty of this paper

通訊功能的實現是本文的難點和重點。

The keystone state games, modeled after the olympic games, are annually held multi - sport competitions providing pennsylvania ' s amateur athletes an opportunity to compete against athletes from throughout the commonwealth in the summer games, winter sports festival, and the pennsylvania senior games

重點州的比賽，在奧運會以後當模特兒，是提供賓夕法尼亞的業余運動員的每年保持的多運動比賽在夏天比賽，冬季運動節日，和賓夕法尼亞四年級生從在整個共同體對運動員競爭的一個機會比賽。

The justification of power - keystone of niccolo machiavelli ' s political philosophy

馬基雅弗利政治哲學的基石

But we would be doing the keystone microsurgery either over or next to the entire collector

但是做這樣的顯微手術差不多要覆蓋整個收集器上空。

Furthermore, the existing theory can ’ t explain the photocurrent gain, so the i - v characteristics under illumination are the keystone of the research work

並且現有理論無法解釋光增益現象，因此穩態光照下電流隨偏壓變化的關系成為本文研究的重點之一。

The fourth part is the keystone of this paper. through michael e. porte ' s contest strategy theory, strategy and technique - frame design, human resource etc,

並對研究院新組織結構的設置構思、分配機制的再完善、人力資源的開發與利用以及迎對未來競爭的策略和新模式作了探討。

Introducing intranet security resolvent ' s goal, principia, constitutes and keystone

2 .提出網路安全設計的目標、原則、組成部分及側重點。

In this paper, the main research works are as follows : 1 ) survey and analysis previous work in auv navigation and summarize : as the cumulate error, the dead - reckoning and inertial navigation systems ca n ' t be used without other modified system ; the acoustic navigation system is used only in small range, and is very expensive. 2 ) two important approaches in geophysical navigation techniques are summarized, one is terrain contour based navigation, this approach is investigated keystone today ; the other is image based navigation, due to no perfect image sensors and image seabed map, this approach has seldom been practised. 3 ) two important terrain contour based navigation algorithms has been applied to auv, one is match algorithm - based terrain contour match ( tercom ) ; the other is kalman filter - based sandia inertia terrain - aided navigation ( sitan )

主要研究內容包括：一、總結分析了當前水下導航的常用方法和不足之處，指出基於航位推算的導航方法，存在著最大的問題就是導航誤差的積累問題，如果沒有修正系統，這種方法很難滿足使用要求；其次指出基於聲學的導航方法，造價昂貴，導航范圍有限，難以滿足自主水下航行器大范圍導航的需求；二、總結了當前水下地形輔助導航的主要技術路線，一是基於地形高程的匹配方法，這是當前研究的重點；二是基於地形圖像的匹配方法，由於缺乏良好的圖像傳感器，和可用的海底圖像地圖，目前這種方法還有待研究發展；三、將兩種地形高程匹配的常用方法應用到自主水下航行器上：以相關演算法為前提的地形輪廓匹配（ tercom ）方法和以卡爾曼濾波為基礎的桑迪亞慣性地形輔助導航（ sitan ）方法，前者演算法簡單可靠，但是導航精度不高，後者雖然精度比較高，但存在著演算法較為復雜、有可能發散和出現奇異值等問題。

Unfortunately, qualified health personnel ? along with the institutions, such as universities and medical centers, needed to train them ? are a missing keystone in many places

不幸的是，許多地區缺乏合格的衛生人員這塊基石，也缺乏訓練這些人員的機構，好比大學及醫學中心。

The resemblance and difference between industrial ecosystem and natural ecosystem was studied, with description of resemblance of material circulation, energy flow, inherence motility, evolution, keystone species and symbiosis

摘要對工業生態系統和自然生態系統的相似性和區別進行了研究，分別從物質循環和能量流動、內在動力、進化和演化、關鍵種、共生等方面進行了相似性研究。