最可幾大小 的英文怎麼說
中文拼音 [zuìkějīdàxiǎo]
最可幾大小
英文
most frequent size-
Look into next year, above all need reviewing was mixed last year even this year the year before last year, can say, grail drops through abidance of a few years, the pannikin that acclaims be in fashion for a period before a few years, science and technology, recombine etc is simple congenial idea almost what had changed to these 2 years is very malapropos, but big change often is need time is mixed accumulate, quantitative change will be changed finally into qualitative change, people from to these stocks from love to arrive to coma detesting also is to need time to change likewise
展望明年，首先需要回顧今年甚至去年和前年，可以說，大盤經過幾年的持續下跌，在幾年前炒作盛極一時的小盤、科技、重組等幾乎是純投機概念到這2年已經變的很不合時宜了，但是大的變化往往是需要時間和積累的，量變最終將轉化成質變，人們從對這些股票從喜愛到麻木到厭惡同樣也是需要時間來改變的。For civil purpose. the biggest advantage of the flying air boat is that it can anything that a plane can do but at the cost roughly of one tenth, the time of staying in the air is very long ranging from 24hr. - 72hr.,
飛艇最大的優點是凡是飛機能做的事飛艇幾乎全能做，但飛行成本比飛機便宜十幾倍，留空時間長，一般飛艇空中飛行時間可達24小時- 72小時，以上這些均是大型飛艇。Canberra reuters - australian firefighters are hoping for a barbecue, snow and a few hours sleep on christmas day as bushfires continue to blacken the country s southeast. fires have burnt out more than 800, 000 hectares 3, 000 square miles of bushland in the southern state of victoria - an area the size of cyprus - and on thursday were threatening several towns and a major ski resort
據路透社12月21日報道，澳大利亞東南部地區的森林大火最近一直燒個不停，而對那些始終奮戰在撲火最前沿的消防員來說，他們眼下最希望看到的情景就是幾天後能迎來一個雪花飛舞的聖誕節，這樣便可以借機吃上一頓野外燒烤，然後抓緊時間睡上幾個小時。The asteroids are the most important small bodies in the solarsystem, and they mainly lies in the two locations - a main belt between the mars ' s orbit and the jupiter ' s and the near - earth space. the most feature of the orbits of near - earth asteroids ( neas ) is that the semi - major axes of the orbits are nearly equal to that of the earth or the perihelia distances are approximate to or even less than the mean distance between the sun and the earth, thus they could move into inside of the earth ' s orbit, so that they might close approach or even colliside with the earth ( or other planets, such as the venus, the mars, etc. ). the characteristic brings about some difficulties in the numerical research during their orbital evolution, which leads to the failure of the normalization technique in the general removal impact singularities of celestial mechanics methods and the symplectic algorithm which is successfully applied to the investigation in quality. by comparing the computation effects of several common numerical methods ( including symplectic algorithm ), and considering the nature of the movement of the small bodies, the corresponding treatments are provided here to improve the reliability of the computation
小行星是太陽系最重要的一類小天體，主要分佈在兩個區域；火星和木星軌道之間的一條主帶和近地空間.近地小行星軌道的最大特點是其軌道半長徑與地球軌道半長徑相近，或近日距離接近甚至小於日地平均距離，其運動可深入到地球軌道的內部，這將導致該類小行星與地球（還有金星、火星等）十分靠近甚至發生碰撞.這一特徵給其軌道演化數值研究帶來一些困難，包括天體力學方法中一般消除碰撞奇點的正規化處理以及對定性研究十分成功的辛演算法都將在不同程度上失效.通過對幾種常用數值方法（包括辛演算法）計算效果的比較，根據小天體運動自身的特性，給出了相應處理措施，從而可提高計算結果的可靠性Scan disk will take sometime ; best go do something else for few hours after the scan started. it could taker longer if its larger hard drive
掃描磁盤需要一些時間；在掃描啟動后的幾個小時里最好做其它事情。更大的硬盤可能花費更長的時間。Because wake vortices can persist in calm air for several minutes ( extending for as far as eight miles ), the federal aviation administration requires minimum distances between aircraft, based on size
機尾渦流可以在無風的空氣中停留幾分鐘，向後延伸達12公里，所以美國聯邦航空總署按照飛機大小而規定了飛機之間的最小安全距離。Scientists have found a way to estimate an earthquake ' s ultimate strength by analyzing the initial seconds of a rupture - a step that could one day provide early earthquake warning
美國研究人員最近發現了通過分析地震發生之初的前幾秒的震波大小，便可以斷定出地震最終強度的方法，從而為未來總有一天能夠早些提供地震警報邁出了一步。Scientists have found a way to estimate an earthquake ' s ultimate strength by analyzing the initial seconds of a rupture - - a step that could one day provide early earthquake warning
美國研究人員最近發現了通過分析地震發生之初的前幾秒的震波大小，便可以斷定出地震最終強度的方法，從而為未來總有一天能夠早些提供地震警報邁出了一步。The stability of electric power system has been being focused for a long time toprevent a power system from losing synchronism after sudden fault ， researchers have done much work and got many accomplishments this paper applied the direct feedback linearization ( dfl ) technique on the power system ， a strong nonlinear system simulation results by matlab proved this method efficiency main works and results are as follows ： this paper compared some existing methods in excitation control ， fast valve control and coordinated control respectively, analyzed the developments and actuality of nonlinear control research in brief, illustrated why ransient stability could be greatly improved by using the fast valve control in chapter 3 ， indicated the importance of coordinated control farther this paper introduced the inverse system theory, based on which ， discussed the dfl theory, pointed out which had consistency with the inverse theory, expanded the dfl theory combined the idiographic model equations ， made which adapt to the model of a single machine - infinite bus power system this paper referenced abundance articles and educed a set of equations ， which could describe the dynamical process of excitation and fast valve control for synchronous generators in the equations ， there were several very important parameters of power system - - rotor angle ( ) ， rotor speed ( ) ， generator q axis voltage ( eq ) ， transient voltage ( e ' q ) ， active power ( pe ) ， mechanical input power ( pm ) ， valve opening ( ) ， generator terminal voltage ( vt ) ， based on the model ， nonlinear coordinated controller and terminal voltage optimal controller have been designed by using the expanded dfl theory and lq optimal control theory the simulation results showed that the controller could keep power system transiently stable under the effects of a symmetrical 3 - phase short circuit fault ， which achieved better postfault regulation compared with another two routine methods ， one is the proportion excitation controller and proportion fast valve controller, the other is the proportion excitation controller and the optimal fast valve controller, which could exert good performance when met 1ittle disturbance either
在介紹逆系統理論的基礎上，詳細介紹了dfl理論，通過比較闡明了dfl理論其本質是逆系統方法的一類，並結合具體課題推導出的模型方程將dfl理論進行了擴展，使之適應于電力系統這個強非線性對象。通過參考大量的書籍文獻推導出一套實用的可將大型汽輪發電機勵磁與汽門綜合起來進行控制的模型方程，此模型方程涵蓋了電力系統中特別引人注目的幾個量- -轉子角、轉子轉速、發電機q軸電勢eq 、暫態電勢e ' q 、有功功率pe 、機械功率pm 、汽門開度、機端電壓vt ，在此基礎上建立了實用的電力系統簡化的數學模型，並將擴展的dfl理論應用於此模型系統，結合線性二次型最優控制理論設計出大型汽輪發電機的非線性綜合控制器及機端電壓最優控制器，通過模擬實驗與採用常規的按電壓偏差進行調節的比例式勵磁控制器+汽門比例控制及採用常規的按電壓偏差進行調節的比例式勵磁調節器和基於二次型性能指標設計的最優快控汽門（考慮發電機的飽和因素）進行了對比，證實了採用此種控制器可以有效地提高電力系統的暫態穩定性，並且在電力系統遭受小干擾時同樣具有良好的調節性能。In these methods, relativity degree solution is the method in which an ideal solution is established, the relativity degrees of evaluated solutions and the ideal solution are compared and orders are marshaled at last. affiliation degree solution is the solution in which ideal solution and ill - ideal solution are established, affiliate degrees between evaluated solutions and ideal solution are resolved by establishing a goal function and then orders of all solutions are marshaled according to measurements of affiliation degrees. gross profit solution is the solution in which both ideal solution and ill - ideal solution are considered, the differences between evaluated solutions and them a re measured according to n - dimension euclidean distance, and then gross profits are calculated
其中關聯度法是首先確立一個理想方案，然後比較待評估方案與理想方案的關聯度，最後根據其大小對各待評估方案進行排序；優屬度法是首先確立理想方案和負理想方案，然後把各待評方案與理想方案和負理想方案的優屬度為權建立一個目標函數，進而求出各待評方案與理想方案的優屬度，最後根據優屬度的大小對各方案進行排序；總效用法的思想是同武漢理工大學碩士學位論文時考慮理想解與負理想解二者作為參照基準，並採用n維歐幾里德距離來度量任意可行解（被評估方案）與理想方案及負理想方案之間的差異，然後指導兩個差異結合在一起計算被評估方案的總效用，評估的原則是總效用越大越好;嫡本是物理學中的概念，在信息理論中被借用來作為度量權重的一種方法，但也可用來評估各方案的優劣，其評估原則是嫡值越大越好。The main work of this paper was as fellows : ( 1 ) generalized the development of pre - stressed steel structure in our nation and abroad, and pointed out the main problem in practice ; ( 2 ) presented the mechanism of pre - stressed steel structure and revealed its applicable range ; ( 3 ) established the optimization design model for pre - stressed steel structure, which accounts for constraints on stresses and displacements of structure ; ( 4 ) brought forward the optimization design method, which combined linear programming and the principle of full restriction, through which we can obtain the magnitude of each time pre - stress and the optimized sections of each members of structure ; ( 5 ) analyzed the best times of pre - stress and pointed out that 2 ~ 3 times is preferable ; ( 6 ) conducted optimization design on large - space steel roof, horizontal parallel steel truss with local cables, horizontal parallel steel truss with global cable, and ultra - static steel truss, the result of which indicated that the multiple pre - stress structure is very economic ; ( 7 ) compared different schemes of cable placement for horizontal parallel steel truss, and the results showed that the local cable only unloaded the second girders, but had no response on the first girders and stomach poles, while global cable could unload the second girders and the stomach poles outside of turning point of cable, thus proving that global cable is more economic than local - cable
本文的主要工作是：對國內外預應力鋼結構的發展歷史及現狀作了綜述和總結，指出當前預應力鋼結構工程實踐中存在的主要問題；闡述了預應力鋼結構的受力機理，並指出預應力鋼結構的適用范圍和特點；在考慮結構應力和變位約束的條件下，建立預應力鋼結構優化設計模型；提出多次預應力鋼結構優化設計方法和步驟，採用線性規劃和滿約束準則相結合的優化方法，可優化設計出施加的每一級預應力的大小，並得到結構各部分的優化截面；對多次預應力最佳的施加次數作了分析，並建議以2 3次為宜；為驗證文中理論和方法，分別對大跨多次預應力鋼屋架、局部布索的水平平行弦鋼桁架、整體布索的水平平行弦鋼桁架和局部布索的超靜定鋼桁架等算例進行了優化設計，經濟效益明顯；對水平平行弦鋼桁架的幾種施加預應力的方案進行比較，對于局部布索，預應力只對下弦起到卸載作用，對上弦和腹桿基本不起作用；而整體布索預應力除對下弦卸載外，對索折點以外部分腹桿也起到卸載作用，經濟效益好於局部布索。Amorphous can be obtained at certain composition range using ball milling. the size of the amorphous particles decreases with the lengthening of milling time, and reaches several nanometers. experiment also shows that the mixture powder is well ferromagnetic
實驗發現，在一定成分范圍內通過球磨可以獲得非晶，非晶粉末顆粒大小隨球磨時間的延長而減小，最終達到幾個納米；同時發現，該混合粉末具有良好的鐵磁性。Nevertheless, they can be divided into several categories on the basis of cost and performance : the personal computer or microcomputer, a relatively low - cost machine, usually of desktop size ( though “ laptops ” are small enough to fit in a briefcase, and “ palmtops ” can fit into a pocket ) ; the workstation, a microcomputer with enhanced graphics and communications capabilities that make it especially useful for office work ; the minicomputer, generally too expensive for personal use, with capabilities suited to a business, school, or laboratory ; and the mainframe computer, a large, expensive machine with the capability of serving the needs of major business enterprises, government departments, scientific research establishments, or the like ( the largest and fastest of these are called supercomputers )
然而，根據成本與性能，它們可分為幾類：個人計算機或微型計算機，一種成本相當低的機器，通常只有桌面大小（盡管「膝上型計算機」小到能夠放入公文包，而「掌上型計算機」能夠放入口袋） ；工作站，一種具有增強的圖形與通信能力、從而使其對于辦公室工作特別有用的微型計算機；小型計算機，一般就個人使用而言太昂貴，其性能適合於工商企業、學校或實驗室；以及大型機，一種大型的昂貴機器，具有滿足大規模工商企業、政府部門、科研機構或者諸如此類機構需要的能力（其中體積最大、速度最快的稱為巨型計算機） 。This means that the actual size of the heap may be several times bigger than the maximum heap residency of the user program
這意味著堆的實際大小可能比用戶程序的最大堆駐留空間要大幾倍。It is shown, through the analysis of their surface power and astigmatism, that the shape of the meridian line has significant influence upon the distributions of surface power and astigmatism. their keystone distortion is small. in this way, pal meeting different circumstances can be designed
最後，舉例設計了光焦度增量為2 . 50m ~ （ - 1 ）的幾種漸變鏡片，通過對設計結果分析研究，指出可得到梯形畸變較小的pal鏡片，子午線光焦度漸增多項式參數的選取會影響鏡片球面度和柱面度的大小和分佈，由此，可設計滿足不同使用要求的漸變鏡片。4. the study on pore structure shows that the incremental pore size of hbc concrete ( 3d, 7d ) is relatively larger, approximately equivalent at 28d, but smaller at 90d and180d compared with opc concrete. the harmful pore of both hbc and opc concrete decreases sharply but little harmful and harmless pores increase greatly, especially the harmless pore whose pore size is less than 20nm for hbc concrete increases much more than opc concrete, which can explain why hbc concrete possesses excellent long term properties
孔結構研究表明：和opc混凝土相比， hbc混凝土早期（ 3d 、 7d ）最可幾孔徑較大，但隨著齡期的增加，其後期最可幾孔徑大幅度下降， 90d 、 180d時則小於opc混凝土的最可幾孔徑；隨著齡期的增加， hbc和opc混凝土的多害孔急劇減少，而少害孔和無害孔則大幅度增加，其中尤以hbc混凝土其孔徑小於20nm的無害孔較opc混凝土增加最多，這是hbc混凝土後期諸項性能優良的主要原因之一。Then the unified approach can be applied to it to acquire the ensemble random evolutionary response. since the normal probability density function ( pdf ) may lead to instability of some sample systems when the random parameters taking sufficiently small negative values, an arch - like pdf and a more adaptable - pdf, together with the matching chebyshev polynomial approximation and gegenbauer polynomial approximation, are suggested. numerical examples show that the suggested methods are effective
相比較而言，隨機模擬法的結果無疑是最可靠的，但是它的計算量嫌大；隨機攝動法的計算量遠小於隨機模擬法，但是它要求隨機攝動量必須是一個小量；正交展開法的計算精度好於隨機攝動法，其得到結果與隨機模擬法得到的結果幾乎吻合，其計算量略多於隨機攝動法，但與隨機模擬法相比要少的多，不過計算前的準備工作較費時。The result indicated that, mix the mineral mixture of fly ash, flag into concrete can optimize the concrete pore structure, improve the concrete compressive strength and impermeability, and along with the age increment the improvement become more obviously ; after saturated freezing and thawing, the concrete pore structure changed apparently, total porosity increased, macro porous quantity rapid increased, small pore quantity reduced, mean radius and most probable aperture increased ; and the more saturated degree, the more obviously destructive effect
研究表明:在混凝土中摻加粉煤灰、礦渣等礦物摻合料優化了混凝土的孔結構，提高了混凝土的抗壓強度和抗滲性能，且隨齡期的延長這種改善作用更加明顯;飽水凍融后混凝土的孔結構變化明顯，總孔隙率增加，大孔數量急劇增大，小孔數量減小，平均孔徑和最可幾孔徑增大;且飽水程度越大，這種破壞作用越明顯。First1y, in this paper, the testes about tensi1e resistance of masonry components in different period are processed and re1ated suppositions and formu1as are brought forward : the formu1a about maxima1 shear stress of top side in high or tier masonry bui1dings is deduced. it can be found easi1y that the factors affect ing the maxima1 shear stress are vertica1 resi stance coefficient 1oad magnitude wa11 geometry dimensions and its modu1us of e1asticity
首先，進行了不同齡期下的砌體試件抗壓力學性能試驗，提出了相關的假定和公式，推導出了縱橫墻荷載差影響下的多、高層砌體結構房屋頂層的最大剪應力公式，從中可以看出影響最大剪應力的因素有豎向阻力系數、荷載大小、墻體的幾何尺寸和墻體的彈性模量等。This method is a novel, simple method calculating the ocean wave force on floater. you can find the rule between ocean wave force and time at any moment, and get the biggest ocean wave force on floater if you give the actual instance of the sea, the geometrical dimension of the floater and the depth of the floater in the water
這種計算方法是一種新穎的計算漂浮體上波浪力的簡單方法，在計算波浪力的過程中，只需要給出實際海況，浮子幾何大小，以及浮子吃水深度就可以求得波浪力隨時間的變化規律，並可求得浮子所受的最大波浪力。分享友人