At present, people usually use birefrigence and quasi - phase - matching methods to achieve higher effiency in the process of conversion. a significant advantage of quasi - phase - matching method is that the interaction is occurred through the largest element of the x ( 2 ) tensor ; the period of optical superlattice can be designed randomly, and any interaction can be matched without walk - off angle ; they are fitted to be used in frequency conversion of lower power especially. the quasi - phase - matching method has some advantages over birefrigence method, improving the efficiency of frequency conversion ; the range of frequency conversion covers its whole transperant wavelength
由於準相位匹配技術有其獨特的優勢,可以利用非線性光學晶體的最大二階
極化張量,如ppln 、 pplt 、 ppktp用的非線性
極化張量都是d _ ( 33 ) ,其有效非線性系數高出普通非線性光學介質(如bbo 、 lbo 、 ktp )一個數量級,而且可以人為靈活設計調制周期,通過周期設計其頻率變換范圍可以覆蓋準相位匹配介質的整個透明波段,選擇無走離效應,解決了常規pm難以解決的問題,拓寬了非線性晶體的應用范圍,
極大
地提高了頻率轉換效率,已成為非線性光學材料和固體激光器的研究
熱點之一。
These events have exerted a great and far - reaching influence on the development of the cause undertaken by our party and state, and they have tremendously inspired the patriotic enthusiasm of the chinese people of all ethnic groups, enhanced their national pride and increased the cohesiveness of the chinese nation
所有這些,對於我們黨和國家事業的發展都具有重大而深遠的影響,
極大
地激發了全國各族人民的愛國
熱情,增強了民族自豪感和凝聚力。
Classic sauvignon nose with an abundance of tropical fruit, lime and freshly cut grass. medium - bodied on the palate with vibrant forward fruit and balanced with refreshing racy acidity
經典的白蘇維翁的氣味伴著豐富的
熱帶水果的香味.視覺清新透明,中度飽滿,豐富的水果味被原味的酸性
極好
地平衡了.此酒獲得2004年悉尼國際葡萄酒比賽藍金獎
The security that the boiler burns depends on the stability of flame mainly, in order to avoid the emergence of the explosive incident of the boiler, the coal powder must be burnt steadily in the stove, if it is unstable to burn, temperature field is not even in the stove, light to cause thermal efficiency of boiler reduce greatly, cause to waste, heavy and easy to is it produce stove serious consequence to present
鍋爐燃燒的安全性主要取決於火焰的穩定性,為了避免鍋爐爆炸事件的發生,爐內煤粉必須穩定燃燒,如果燃燒不穩定,爐內溫度場不均勻,輕則導致鍋爐的
熱效率
極大
地降低,造成浪費,重則容易出現爆爐等嚴重後果。
The volcano coloured glaze can be incarnated into extremely cold crystals or the extremely hot liquid at the same time, the two extreme sides can be merged to form one and hidden in the volcano coloured glaze
火山琉璃可同時化身為
極冷的晶體或
極熱的液體,兩種
極端的力量奇異
地融合一體,儲藏在火山琉璃中。
Manganese dust in the extremely hot air of the valley, covers the rocks over the centuries and colors them dark brown
錳元素在山谷
極端
地熱的空氣下變成灰塵,覆蓋在巖石上有數個世紀之久,然後變成了茶褐色。
There are many plants that have the character of time - varying, large delay, large inertia in the process of production of modern power station such as the superheated steam temperature, the reheated steam temperature, the water treatment of boiler and the load regulation. some of them have the strong character of nonlinear and some of them are multivariable coupling systems it is very difficult to obtain good effect of control by conventional pid control. it is necessary to set up the mathematics models of controlled plants if applying control means of modern control theory such as self - adaptive control, optimal control , decoupling control and predictive control. and these control systems have large calculation and bad character of real time in general. these disadvantages make them be not able to meet the need of real production process and limit the application of them in modern power station. now the generator units are developing towards large capacity and high parameters. many new kinds of generating electricity means are coming into being. the characers of production units of power station become more and more complex but the demand to quality of control becomes more and more strict. the new control means are in bad need to control them effectively
現代電站的生產過程中存在過
熱汽溫、再
熱汽溫、鍋爐水處理、負荷調節等許多大遲延、大滯后、特性時變的對象,它們中有些還是具有強非線性特性的對象或多變量耦合系統,採用常規的pid控制手段很難取得良好的控制效果。若應用現代控制理論中的自適應控制、最優控制、解耦控制、預測控制等控制手段,則需要建立被控對象的數學模型,而且往往控制系統的計算量大、實時性差。這些缺點使其很難滿足實際生產過程的需要從而
極大
地限制了其在現代電站中的應用。
That was a wonderful gift that master has given to all the hong kong fellow initiates. " the audience in cosmopolitan hong kong comprised people of several nationalities and diverse spiritual groups
因為此
地是一國際城市,所以滿滿的聽講者中包含了各種國籍靈修教派的人士,提問甚為踴躍,反應
極熱絡。
Vegetarianism has become increasingly popular after a series of outbreaks of meat - related diseases. the j j vegetarian buffet prepares delectable vegetarian dishes for joyful guests on its opening day. the biggest obstacle for koreans in pursuing a vegetarian diet has been a lack of vegetarian restaurants
目前隨著素食在韓國日益受到重視和歡迎, sm素食屋已逐漸在韓國享有盛名,特別是在與肉品有關的疾病接二連三
地爆發之後,素食更是受到民眾
極熱烈的響應。
Before his arrival in chile, a quan yin messenger had heard about the sincerity of local initiates, who often enthusiastically support truth - sharing activities abroad, and whose contact persons are whole - heartedly devoted to their work. therefore, it was not surprising that during the most recent visit by the messenger, many people registered for initiation and the video lecture we organized was warmly welcomed by the local community
觀音使者來到智利之前,便對智利同修的誠心早有所聞,他們經常
熱心前往他國支援弘法的工作,幾位聯絡人更是全心全意
地投入,因此這次等待印心的人數相當多,所舉辦的電視弘法講座也得到民眾
極熱烈的回響!
The extremely harsh working conditions directly result in high thermal and mechanical loads in diesel engines " piston assemblies, and so due to high stress it becomes one of the most vulnerable components assembly in diesel engine. piston assemblies " failures such as cylinder sticking, scoring, gumming, etc., greatly limit diesel engines " durability and reliability
由於長期工作在惡劣的環境下,柴油機活塞組要承受很高的
熱負荷和機械負荷,這些負荷所產生的高綜合應力影響了它的使用壽命,其可能導致的咬缸、拉缸、結焦等故障
極大
地危害了柴油機整機的耐久性和可靠性。
The same services will be provided to the client even if there are some problems after the quality guarantee period
8如果在質保期后出現問題供方同樣將積極熱情地盡快地給予解決。