major joints 中文意思是什麼
major joints
解釋
主要關節-
A reliability experiment of thermal aging was carried out for the two types of joints, scanning electron microscopy, energy dispersive x - ray spectrometer and micro x - ray diffractomer were adopted to investigate the interfacial evolution behavior of joints, and kinetics model of imc formation was established. the results show that imc growth follows the parabolic law as a function of aging time at certain aging temperature, imc growth is more sensitive to the aging temperature than the aging time, the activation energy of cu - al imc growth is 97. 1kj / mol and the major forming cu - al imc are cual2 and cu9al4, the activation energy of au - al imc growth is 40. 1kj / mol and the main au - al imc are au4al and au5al2, with au2al and aual at the interfacial periphery of joints, the rate of cu - al imc growth is about 1000 times slower than that of au - al imc, and kirkendall voids and cracks are easily appeared during thermal aging in gold ball bonds while voids and cracks are absent in copper ball bonds even after aging at 200 for 2900 hours and 250 for 169 hours
研究結果表明:金屬間化合物厚度與老化時間的關系符合拋物線法則，金屬間化合物的生長對老化溫度比老化時間更加敏感; cu - al金屬間化合物生長的激活能為97 . 1kj / mol ，老化后金屬間化合物呈層狀分佈，主要相為cual2和cu9al4 ; au - al金屬間化合物生長的激活能為40 . 1kj / mol ，主要相為au4al和au5al2 ，同時在界面周邊區域生成了au2al和aual ;老化過程中cu - al金屬間化合物生長速率比au - al金屬間化合物生長速率小103數量級;金絲球鍵合點200老化96小時出現了明顯的kirkendall空洞和裂紋，但銅絲球鍵合點200老化2900小時和250老化169小時都沒有形成空洞和裂紋。 -
With a aging population and as osteoarthritis has the feature of suddenly becoming very common in the knee and hip joints in women after menopause, it is envisaged that osteoartritis will become a very major public health problem in hong kong, and in particular to women
隨著人口老化，預計退行性關節炎在本港，特別是對婦女所帶來的健康問題將日趨嚴重。有見及此，及早預防非常重要。 -
The major requirements of these joints are big mobility, high stiffness, small mass and compact structure space
對這些關節的要求主要是：移動性大、剛度高、質量輕以及結構空間緊湊。 -
There has very important practical value to study the statistic character of fatigue load on steel crane structures and of fatigue resistance on all kinds of structural joints and to analysis the fatigue reliability of structural detail, which can be used to fatigue safe control. the fatigue reliability theory and fatigue safe control applications on steel crane structures in service are studied based on the structural reliability theory in this paper. the major contents are mainly summarized as follows : 1
研究鋼結構吊車梁承受的疲勞荷載與各種構造連接的抗力統計特性，分析構造細節的疲勞可靠性，進而對其進行疲勞安全控制，對于在役鋼結構吊車梁的鑒定與加固具有非常重要的實用價值與指導意義：本文以結構可靠度理論為基礎，對在役鋼結構吊車梁的疲勞可靠性、安全控制應用與維修加固決策進行了研究，研究的內容包括以下幾個方面。 -
Another major consideration on alignment design is the joints between the tunnel tubes of the existing mtr cross harbour tunnel tsuen wan line. mtrc maintenance requirements stipulate that those joints cannot be obstructed by the cwb to ensure regular inspection and necessary repair works
-定線設計的另一主要考慮因素是現有地鐵過海隧道荃灣線管道之間的接駁位，地鐵公司的維修規定訂明，中環灣仔繞道不得阻礙這些接駁位，以便進行例行檢查和所需維修。
分享友人