命題常數 的英文怎麼說
中文拼音 [mìngtíchángshǔ]
命題常數
英文
propositional constant-
The main research work and achievements in the dissertation are given as follows : 1 using dynamic programming techniques and two different criterions ( maximum probability of hit criterion and maximum expected no. of penetrators criterion ), the author investigates optimal allocation of tactical missiles between a primary target and a secondary target under the condition that the primary target is defended by the secondary target ( only " normal " defensive mode can be used by the defender ), presents the optimal policy of tactical missiles attacking the primary target
本文所進行的研究工作和取得的創新性成果主要為： 1利用動態規劃理論和兩個不同的準則（最大命中概率準則和最大期望突防數量準則） ，研究了一個主要目標在一個次要目標防衛下（次要目標採用「常規」防守模式） ，戰術導彈對這兩個目標打擊的優化分配問題，給出了導彈對目標打擊的最優分配策略。2 based on dynamic programming techniques, using three different criterions ( maximum probability of hit criterion, maximum expected no. of penetrators criterion, and minimum expected cost criterion ), the author investigates optimal allocation of tactical missiles between a ( several ) primary target ( s ) and several secondary targets under the condition that the primary target ( s ) is defended by the secondary targets ( only " normal " defensive mode can be used by the defender ). the optimal allocation policies of tactical missiles between the primary target ( s ) and the secondary targets are given
2基於動態規劃理論，採用三個不同的準則（最大命中概率準則、最大期望突防數量準則以及最小期望費用準則） ，研究了一個和多個主要目標在多個次要目標防衛下（次要目標採用「常規」防守模式） ，戰術導彈對這兩類目標打擊的優化分配問題，給出了導彈對目標打擊的最優分配策略。Mathematics method of thinking opposite to starched mathematics knowledge is fuller of vitality, mathematics knowledge is a result, but mathematics method of thinking pays attention to the formation of the result ; mathematics knowledge is recorded down with letter, sign, sketch. . etc explicit esse, but mathematics method of thinking usually tacitly exsits in the formation of concept, formula, rule, axioms and the process of problem - solving ; mathematics method of thinking is the knowledge to be placed in the higher than mathematics knowledge, if we assimilate knowledge to a key, then, mathematics knowledge opens the door of a certain realm, but mathematics method of thinking could open the door of the different realm
相對于數學知識的呆板而言，數學思想方法更富有生命的味道，數學知識是結果，而數學思想方法關注結果的形成過程；相對于數學知識的以文字、符號、圖形等外顯的形態直接記錄下來的存在方式，數學思想方法則常常以內隱的形式存在於概念、公式、法則、定理的形成過程和問題解決的過程之中；數學思想方法是比數學知識處于更高層次上的知識，如果用把知識比作鑰匙，那麼，數學知識開啟的是某一領域的大門，而數學思想方法可以開啟不同領域的大門，比數學知識更富有指導意義。A total of 18 galleries cover a wide range of science and technology topics including light, sound, motion, electricity and magnetism, mathematics, life science, geography, meteorology, computer, transportation, communication, food science, energy and home technology
個展區，題材非常廣泛，包括了光聲音力學磁與電數學生命科學地理氣象電腦運輸通訊食物科學能源及家居科技等。The immersion electrical heater is chiefly applied in the direct contact mode of fluid heating. it features fast heat exchange and high thermal efficiency. it has the varieties of water heater, oil heater and gas heater. its heating element power density, i. e. the power per unit of heating area of the heating element, is an important parameter of the electrical heating element, which has a direct bearing on the performance and working life. the working out of the value is a highly specialized problem, being under the influence of many factors ( media flow rate, tempt, physical and chemical properties and direction in which the medium flows past the element etc )
浸入式電加熱器主要用於直接對流體接觸加熱的場合，具有熱交換快，熱效率高等特點，分為水用加熱器、油用加熱器、氣體用加熱器，加熱元件的功率密度：即電加熱元件單位發熱面積上的功率，它是電加熱元件極重要的參數，直接影響加熱器的使用性能及使用壽命，它的取值是一個非常專業的問題，受到許多因素的影響（如介質的流速、溫度、物理和化學性質及介質流過加熱元件的方向等等） 。Because of radio wave propagating along the ducts with enhanced fields on the order of the free - space field, the problems of the co - channel interference are more complicate for communication systems with the results of intersystem interference and the formation of other system, and therefore affecting the determination of the coordination distances or the optimization of the distribution and separation of delay, and for surveillance system such as radar system the problems can be radar holes or the extensions of detect range
對于通信電路，它使系統間的相互干擾問題變得復雜，既可能幹擾其他系統又可能形成另外的系統，從而影響系統的有關參數如中繼電路的最佳組合（分佈、間隔）和協調距離，對于探測系統產生的則是雷達空洞、超視距探測等問題。這些問題對相關無線電系統特別是軍事應用系統可能是致命的，因而以波導傳播為代表的反常傳播特性研究受到極大重視。Taking ti alloy tc11 electron beam welded work - piece as research object, which is the conventional material of aero engine compressor blisc, the fatigue damage evolution law of fatigue damage action in the area of welded joint based on damage mechanics theory is analysed, and fatigue damage model, which macro - parameter and micro - damage characteristics are related, with fractal geometry - a new conception of modern mathematics is set up in this paper. it tries to research the measuring method of fatigue fracture fractal dimension and the relationship of fractal damage variable with fatigue life. it also sets up the welded joint fatigue damage fractal evolution equation
本課題以航空發動機壓氣機葉盤常用材料鈦合金（ tc11 ）電子束焊構件為研究對象，對焊接接頭的疲勞破壞行為，基於損傷力學理論分析其疲勞損傷演化規律，應用現代數學的新概念? ?分形幾何學理論，建立宏觀參量與細觀損傷特徵相聯系的疲勞損傷模型，研究疲勞斷口分維數測量方法以及分形損傷變量與疲勞壽命之間的關系，建立焊接接頭疲勞損傷分形演化方程。分享友人