theory n. 1.理論,學(xué)理,原理。 2.學(xué)說(shuō),論說(shuō) (opp. hypothesis)。 3.推測(cè),揣度。 4.〔口語(yǔ)〕見(jiàn)解,意見(jiàn)。 the theory of two points 兩點(diǎn)論。 Darwin's theory of evolution 達(dá)爾文的進(jìn)化論。 theory of equations 【數(shù)學(xué)】方程論。 theory of everything 【物理學(xué)】(把相對(duì)論、量子論和宇宙大爆炸理論都包括在內(nèi)的)萬(wàn)用理論。 theory of relativity 【物理學(xué)】相對(duì)論。 the atomic theory 原子說(shuō)。 Our scheme is good both in theory and in practice. 我們的方案在理論上和實(shí)施上都是好的。 combine [separate] theory with [from] practice 理論結(jié)合[脫離]實(shí)際。 My theory is that we must bring new blood into the Institute through appointment of younger men to important positions. 我的意見(jiàn)是我們學(xué)院應(yīng)該通過(guò)重用年輕一些的人來(lái)注入新的血液。 theory of games 博弈論,對(duì)策論,權(quán)衡利弊得失的形勢(shì)分析。
The effect of the wind load on the stress of hole ' s edge of point - support glass is analysed and compared by large deflection and small deflection theory respectively . and the critical wind load is offered 在本文中,風(fēng)荷載對(duì)點(diǎn)支式玻璃幕墻承載性能的影響,就分別按大撓度和小撓度進(jìn)行分析和比較,提出了按大、小撓度理論計(jì)算的臨界風(fēng)荷載值。
J . melan proposed the deflection theory for analyzing large - spanned suspension bridge early as in 1888 . the finite element theory has been so advanced today and has been widely applied in analyzing suspension bridges J . melan早在1888年就提出了大跨度懸索橋的撓度理論,空間有限元理論也在七十年代中期趨于成熟并廣泛應(yīng)用于大跨度懸索橋的分析。
The main contents of the paper are as follows : 1 . based on the piezoresistive effect , large or small deflection theory , thin film ’ s stress theory and other mechanics or electricity knowledge , a piezoresistive micro pressure sensor is designed 論文的主要內(nèi)容如下: 1 .利用壓阻效應(yīng)、大(小)撓度理論、膜的應(yīng)力形變等力學(xué)、電學(xué)知識(shí)設(shè)計(jì)了一種壓阻式微壓力傳感器。
In the small deflection theory , by buckling analysis , the classical buckling critical load of integrative braid composite cylindrical shells under axial compression is get . according to the experience and the results of fem , a revised formula for calculating buckling critical load is presented 在小撓度理論中,通過(guò)前屈曲分析得到了完善的編織復(fù)合材料圓柱殼在軸壓情況下的經(jīng)典屈曲臨界載荷,根據(jù)經(jīng)驗(yàn)及有限元計(jì)算結(jié)果,提出了計(jì)算屈曲臨界荷載的修正公式。
The side displacement of the glass plate center is larger or less than the glass plate thickness , for the 3d geometric size of the glass plate and the lateral load vary in a wide range . in other words , the mechanic analysis of glass plate belongs to large deflection or small deflection theory in thin plate theory 由于幕墻玻璃的三向幾何尺寸和橫向荷載集度可在較大的范圍內(nèi)變動(dòng),玻璃板中心的側(cè)向位移,有可能小于或大于玻璃板的厚度,也就是說(shuō),幕墻玻璃的力學(xué)分析,既可能屬于薄板理論中的小撓度問(wèn)題,也可能屬于大撓度問(wèn)題。
But method based on large deflection theory was proposed in this paper . accordingly , output force and displacement of each sma actuator under anticipative attitude was obtained as well as accurate coordinate of the center of the joint and deflection curve equation of the axis of the active catheter 基于大撓度理論對(duì)主動(dòng)導(dǎo)管做了力學(xué)和運(yùn)動(dòng)學(xué)分析,相應(yīng)獲得了預(yù)期姿態(tài)下各個(gè)sma驅(qū)動(dòng)器上的輸出力和輸出位移,以及精確的關(guān)節(jié)中心位置坐標(biāo)和導(dǎo)管軸線(xiàn)撓度曲線(xiàn)的具體形式。
Based on this , presented a new micro pressure sensor , which adopted a si3n4 sensitive membrane ; since the membrane is very thin , we can use membrane - deflection theory to describe the deflection of the membrane under a uniformly applied load , and because with no bending stiffness , the sensitivity of the sensor was increased consequently . finally , numerical calculation of the deflection and stress analysis of the membrane was performed . by utilizing ansys simulation , we can testify that the performance of the sensor reached the design requirement 通過(guò)改進(jìn)敏感元件結(jié)構(gòu),提高了其性能,從而得到適用于靈巧蒙皮表面壓力測(cè)量應(yīng)用的器件陣列:在此基礎(chǔ)上,本文提出了一種新型的微型壓力傳感器結(jié)構(gòu),該結(jié)構(gòu)采用的敏感膜片以氮化硅為材料,厚度較薄,因此該膜片的變形適用于薄膜變形理論的分析,忽略了彎曲應(yīng)力的影響,從而提高了傳感器的靈敏度。
The deflection theory is then used to obtain the most unfavorable moment of the structure under live load , and after the preliminary controlling moment of the structure is obtained by superpositioning the dead and live load moment , the moment and hanger forces arc to be adjusted by the internal force equilibrium method to finally obtain the rational hanger forces 首先用彎矩能量最小原理求出初步索力,然后利用索力得到恒載彎矩,利用撓度理論求出活載作用下結(jié)構(gòu)的最不利彎矩,將恒載與活載彎矩疊加,獲得結(jié)構(gòu)的初步控制彎矩后,采用內(nèi)力平衡法對(duì)彎矩和索力進(jìn)行調(diào)整以得到合理的索力。