共變系數 的英文怎麼說
中文拼音 [gòngbiànxìshǔ]
共變系數
英文
coefficient of covariation-
A camera calibration method with co - line points is proposed, in which distortion center is located according to cross ratio invariability, and then distortion coefficients are calculated based on a line ' s central projection is a line
摘要提出一種用共線點列標定攝像機鏡頭畸變參數的方法,先根據交叉比不變性確定畸變中心,再利用直線的中心投影仍為直線這一性質確定畸變系數。The number of modes should be selected according to the participant coefficient of mode when calculating the internal force by the response spectrum method ; ( 4 ) the roof plate of large base which connect the towers together should be thick enough but not exceeding the proper scope that the towers and the large base can vibrate together, ( 5 ) in structures with large base and muti - towers, with increasing of the capacity of the large base, the inter - story shear force will increase while the inter - story displacement will decrease as to fulfill the ductility request to avoid the large base becoming weak story, but meanwhile, the upper story will turn into weak story, thus the coefficient r s should be within 2. 0 ~ 3. 0
採用振型分解反應譜法計算結構內力時應根據振型參與系數選擇振型避免漏選;大底盤多塔樓結構連接各塔樓的裙房屋面剛度應做得大些,以保證底部裙房與上部塔樓共同振動,但也不能過剛;大底盤多塔樓結構底盤承載力的加強將使底盤層剪力增大、層間變形減小,但易於滿足延性要求,在一定程度上可避免底盤成為薄弱層。但底部加強會導致薄弱層的上移,因此採取提高底盤承載力的措施的效果是有限度的,承載力系數s宜取為2 . 0 3 . 0之間。Then the judging method is proposed, and the proposed method can consider the stress history and viscosity shear strength of soft soil. in this paper, a fem program dpfbm1. 0 ( double plastic foundation beam method ( version 1. 0 ) ) is established. with this program, the influence of some parameters on foundation excavation is fully studied, the parameters include : compression modulus, cohesive strength, angle of internal ficiction, effective angle of internal friction, the embedded length of the wall and building load
針對當前國內外彈性地基梁法存在的缺陷,基於對軟土流變性的研究,採取了剪應力判斷彈塑性狀態,以改進和完善基坑工程彈性地基梁法,推導了彈性狀態下地基反力系數的近似解,提出了採用剪應力組合判斷土彈簧彈塑性狀態的方法,編制了相應的彈塑性共同變形法分析程序dpfbm1 . 0 ( doubleplasticfoundationbeammethod ( version1 . 0 ) ) ,並採用該程序分析了壓縮模量、粘聚力、內摩擦角等參數變化對基坑工程的影響。It is found that " phase produces coplanar slip and reduces the number of movable slip systems because its particles are cut by moving dislocations in deforming process, for its large critical size of cut - bypass, accordingly its strengthening contribution is anisotropic. and strengthening contribution of t1 phase is also anisotropic because it distributes on the four { 111 } slip planes while its critical size is small
研究表明,相由於顆粒的切過-繞過臨界尺寸較大,在變形過程中被運動位錯切過,由此產生共面滑移,減小可動滑移系數目,所以其強化具有各向異性; t _ 1相的臨界尺寸較小,但分佈於四個{ 111 }滑移面上,故其強化也具有各向異性。It has many potential applications, including self - adaptive optics, optical computing and optical communications, image processing and real - time holography. in this thesis, we investigate the properties of the phase - conjugate wave produced by the self - pumped in cu : knsbn crystal and by the four - wave mixing in cr : sbn crystal
光折變晶體具有非常大的非線性光學系數,是一種理想的相位共軛材料,因而被廣泛地應用於自適應光學、光計算、光通訊、圖像處理、實時信息處理等許多方面。X2 test with 2 2 contingency table and ochiai indices were used to analyze the interspecific association of 12 dominant species of meadow community and 20 dominant species of scrub community and 18 dominant species of tree community. pearson ' s correlation coefficient and spearman ' s rank correlation coefficient were also applied to calculate correlations between species
在該地區植被的優勢種的種間關系的研究方面,運用2 2列聯表、 x ~ 2檢驗方法對群落優勢種進行總體相關性和種對間的聯結性檢驗,利用共同出現百分率jaccord指數測定種對間的關聯度,應用pearson相關系數和spearman秩相關系數刻畫種對間的數量變化關系。The azeotropic distillation of the system acetic acid - water - azeotropic agent ( isopropyl acetate and butyl acetate ) is simulated. due to the non - ideal behavior, nrtl - hoc and uniquac - hoc model is used to depict vapor - liquid phase equilibrium behavior of this system. concerning the liquid in the decanter, the stability is checked by tangent plane stability analysis, and the initialization of phase splitting calculation is produced. a good estimate of the phase fration is gotten by successive substitution with newton ' s method, and every component of two phase is gotten by mass equilibrium equation. finally, the solution of this equation is produced with successive substitution calcultion. the naphtali - sandholm method is used to simulation of azeotropic distillation. by virtue of this combined calculation method, the simulation is begun with operational data as basical data. the results of simulation accord with the operating data, which proved that the combined calculation method is credible
該體系具有高度非理想性,氣液相平衡模型採用nrtl - hoc和uniquac - hoc模型,採用切平面判據法對進入分層器中的液相進行液相穩定性測試,提供液液相分離計算的初值,再結合牛頓拉夫森迭代法運算求得相分割系數,根據物料衡算求出各相組成,循環迭代可求得分層各組分數據,共沸精餾模擬計算採用那夫塔列-山德荷姆全變量迭代演算法。It is found that the degree of mineralization and metamorphic coefficient and conversion potential of formation water, the fault is zone of sluicing of atmospheric infiltration water flowing from basin west margin to east ( centripetal flow ) and sedimentary compaction water flowing from qija gulong depression to west ( centrifugal flow )
通過地層水礦化度和變質系數等參數的分佈規律及一系列折算水位剖面圖的分析發現,該斷裂對水是不封閉的,並且是盆地西緣大氣滲入水向東流動(向心流)及齊家古龍坳陷沉積壓實水向西流動(離心流)的共同泄水帶。Three parallel - parallel type cttfcs is studied and compared in this paper. the performance of the cttfc with coupled inductor is similar to that with sharing freewheeling diode while coupling coefficient is one, and similar to that with sharing output capcitor while coupling coefficient is less than one and the converter working ccm
揭示了耦合電感並?並型雙管正激組合變換器與其餘兩種並?並型組合變換器的關系:耦合系數為1時,具有與共用續流管組合變換器相類似的特性;耦合系數小於1且耦合線圈電流連續時,具有與共用輸出濾波容組合變換器相一致的特性。It has been deduced that the search direction remains the same but that the step length decreases in optimizing the improved cost function with the conjugate gradient algorithm from the gradient of the cost function that the fir filter apporaches the contrary point spread function ( psf ) more, and that the estimated image is closer to the original one
從代價函數的梯度入手推導出共軛梯度演算法,其搜索方向保持不變而搜索步長變小,使濾波系數更加退近於點擴展函數逆運算元,從而使估計圖像與原始圖像更加接近。( 6 ) conclusion was obtained by the analyzing the mechanics environment and the stability of the lanslide on the right bank after the dam built : the value of the rock mass stress increased and the tensile stress region obviously reduced, the direction of the principal stress was unchangeable the dam and the landslide were stable under the dangerous condition ( the reservoir and at the same time the earthquake was viii ), but when the water lever suddenly fell and did not think of other force, safe factor evidently reduced, the dam and the landslide will be destroyed under the most dangerous condition ( the water lever suddenly fell and at the same time the earthquake was vi ) ; the stability of the landslide will be destroyed by the horizontal thrust under the most dangerous condition or ; the physical and mechanical parameter will be reduced due to long period filter, the landslide will be destroyed too
( 6 )建壩工程荷載條件下河谷巖體力學環境分析及右岸古滑坡體的穩定問題分析得出:建壩后河谷的巖體應力量值明顯增高,同時左岸的張應力區的范圍及量值明顯減小,主應力的方向依然與模型的底邊界垂直;大壩建成后逐漸蓄水階段以及同時考慮本區最強地震力的作用等各種不同的工況條件時,滑坡體及壩體總體上仍處于穩定狀態;水位驟降時,在未考慮其他外力作用的情況時,滑體的安全系數將顯著降低。若考慮水位驟降及本區最大地震力的共同作用,壩體將在滑坡體下滑推力的作用下產生破壞;建壩后水平推力對右岸古滑坡體穩定性的影響分析可以看出,在最危險的工況條件下,壩體及滑坡體也將處于臨界狀態;在長期滲透變形的作用下,由於滑帶的物理力學參數的降低而有可能導致壩體失穩破壞。Specifically, according to the w - w five parameters failure theory, the fracture criterion of crack is established, and the state of crack ( open or close ) is judged by the values of the crack strain. combining the two points, the predict - model about the failure of concrete material is established. this predict - model can predict 16 failure forms, and basing the different failure form predicted after crack, the stress - strain relationship matrix of concrete material is adjusted
具體來講,根據w - w的五參數混凝土破壞理論,建立混凝土的開裂準則,根據開裂應變值來判斷裂縫是張開還是閉合,從而在兩者基礎上建立了裂縫的開裂預測模式,總共有16種開裂模式;裂后根據具體的開裂模式及殘余抗剪能力來調整混凝土的本構關系矩陣,即用等效剛度代替原有剛度,考慮到垂直於裂縫方向的剛度為零,這樣會使裂后的總剛出現病態,為此文中通過引用鬆弛系數來對出現裂縫的單元進行預處理,一方面可解決因過大的舍入誤差導致計算結果的不可信問題,另一方面就是可加速收斂。Firstly, the strain gauge method was used to measure the time difference of stress wave passing through two gauges adhered on the surface of test piece and also their main frequencies secondly, a 3 - component dynamometer was used to measure the resonant frequency of timber six kinds of full size timber were used for test
本研究旨在研發兩種新的應力波計測技術,其一為利用應變規來測定兩標點間之應力波傳遞時間差及試材之共振頻率,藉以計算試材之音速及動彈性系數,其二為利用三向動力計來測定試材之共振頻率。There are lots of non - linear systems in the nature. because classical and morden control methods have common limitation : mathematical model of the plant has to be known in advance. but in fact many plants are intricate uncentaintied and time - varying. in addition, they also are non - linear. though there are methods of system identification in control theories, the identification theories and ways of non - linear and time - varying system are not mature and systematic. it is very difficult to carry out effective real - time control. the neural networks can approximate random non - linear relations and study by itself, and it provides new thoughts and new ways for solving these problems
由於經典和現代控制方法存在一個共同的局限性:就是要求預先知道被控對象的數學模型,但實際上許多對象具有復雜的不確定性和時變性;此外還具有復雜的非線性。雖然在控制理論中有系統辨識的手段,但是對于非線性時變系統尚無成熟的和系統的辨識理論與方法,要實行有效的實時控制就很難了。人工神經元網路有表示任意非線性關系和自學習等能力,給解決這些問題提供了新思想和新方法。Through the analysis and calculation the conclusion can be made that during the process of the timbering of excavation, the magnitude of soil stress decreases with the increase of the displacement on the base of the still earth pressure, and the earth pressure distribution varies from the triangular distribution of the still earth pressure to other distribution with the displacement of the timbering structure. the thesis introduces the bedding coefficient in the horizontal direction varying with the soil displacement from soil - structure interaction mode, therefore calculation can be made to get more rational calculation result using elastic foundation finite element method which is the same to timbering structure both upwards and under excavation surface
通過分析計算可以得出,在基坑支護過程中,土壓力的大小在靜止土壓力值的基礎上隨支護結構向坑內側位移增大而減小;土壓力的分佈由靜止土壓力的三角形分佈隨支護結構位移變化成其它分佈;由土-結構共同作用模式引入隨土體位移變化的水平向基床系數,使支護結構在開挖面以上部分同以下部分一樣,均可採用彈性地基有限元法進行計算,得出更為合理的計算結果。Ltd. a coupled vibration method on suspended free poles is employed to determine the initial young ' s modulus at elevated temperatures, also the thermal expansion coefficients of fire - resistant steel
通過高溫下的恆溫加載拉伸試驗,得到不同溫度下耐火鋼的屈服強度、極限強度、延伸率、面縮率和應力應變關系,並測定高溫下耐火鋼的熱膨脹系數,採用懸絲耦合共振法測定高溫下耐火鋼的初始彈性模量。The thesis aims at a muliti layer residence project of in jinan baihua small region. according to the heating system of the separating doors in this building controlled by heat meter measurement, it studies the feasibility of the various abstracted cosfficient of the communal heating load calculation. also it studies the difference from the practice. according it, we can draw conculution that the communal heating load calculation are abstracted and allocated averagely according area and added to the variable heating load calculation, taking for the charging heating load calculation
本文將濟南市百花小區的一棟多層住宅為研究對象,根據該住宅室內分戶控制按熱表計量的供暖系統,研究其耗熱量中公共耗熱量各項提取系數的可行性及其與實際測量的誤差,得出將公共耗熱量提取出來,然後按面積分攤到各住戶的可變耗熱量中,作為計費耗熱量的合理性結論。Based on the basic principle of wavelet analysis, multi - resolution analysis of signal in atomic clock is made. the coefficients of wavelet transform for synthesis atomic time, which are weighed and averaged at different wavelet scales, are obtained. then according to reconstruction theorem, multi - resolution synthesis time scale can be reconstructed. since the signal of atomic clock has been analysed by multi - resolution, we can use wavelet variance at different scales to weight and average the coefficients. thus either the difference in stability of different clock or the varying characteristic of the same clock at the different scale are all considered. finaly, this method is checked by the measured data from national timing serve center of shaanxi astronomy observatory. it confirmed that this technique, which is simple and practicable, is a new method of multi - resolution. from this method, the common characteristic of different clocks can be extracted. the stability of multi - resolution synthesis atomic time scale is obviously superior to that of other methods
本文根據小波分析的基本原理,對原子鐘信號進行多解析度分解,將分解后的小波變換系數進行加權平均,得到不同小波尺度綜合原子時的加權平均小波變換系數,然後由小波變換的重構條件,反演綜合時間尺度.由於對原子鐘信號進行了小波分解,利用不同尺度的小波變換系數的小波方差進行加權平均,這樣既考慮不同原子鐘在穩定性方面的差異,又顧及同一臺原子鐘在不同小波尺度的變化特性.最後根據陜西天文臺國家授時中心的實測數據對這種方法進行了檢驗.表明這是一種全新的多解析度綜合方法,這種方法比較簡單而切實可行,它能提取各個原子鐘的共同特性,多解析度綜合時間尺度的平穩性明顯優于其他方法The heat transfer enhancement is different under different oscillator. there is the optimum oscillation intensity under which the heat transfer coefficient will be increased by about 30 percent. the change of outlet structure size of a resonance chamber shows little effect on the strength of heat transfer : the pressure of the optional heat transfer coefficient always is between 0. 4mpa and 0. 6mpa, and the optional heat transfer coefficient is enhanced by 30 percent or so
不同的振蕩強度,強化換熱的效果也不同,存在一個最佳強度,此時的強化換熱效果最好,可以將表面換熱系數提高30 %左右;對于同一共振腔,配合以不同的出口結構尺寸,對于換熱效果的強化的影響變化不大:出現最佳強化效果時的壓力基本都在0 . 4 - 0 . 6 ,最佳的強化效果也都是將表面換熱系數提高30 %左右。Based on this algorithm a self - calibration approach taking account of camera two - degree radial distortion is proposed. the five intrinsic parameters and two - degree radial distortion coefficients can be calibrated by controlling the camera to undergo more than 4 translation motion which are not co - planar
在此基礎上還提出了一種考慮二階徑向畸變的非線性自標定演算法,通過控制攝像機作四次不共面的純平移運動,可以標定攝像機的五個內參數和兩個徑向畸變系數。分享友人