牛頓位 的英文怎麼說
中文拼音 [niúdùnwèi]
牛頓位
英文
newtonian potential-
Sir isaac newton, an english mathematician and philosopher, laid down the principle more than two hundred years ago.
伊薩克牛頓爵士，是一位英國數學家和哲學家，他在二百多年前就制定了這一條原理。The " minimum friction level " of 25 micro newton established by ittf is so high that only pimpled - out rubbers with total friction will be homologated after 01 july 2008 ( the friction level concerns both the surface and the side of the pimples )
2008年7月1日起，國際乒聯訂立相當高的25微牛頓單位「最低摩擦度」只有符合這個摩擦度的正貼膠皮才認可使用（所指的摩擦度包含膠粒的表面和邊緣位置） 。According to non - newtonian fluid mechanics theory and mathematical method, conbined with plunger moving property, the hypothesize fluid is imcompressive, hydraulic radius of flow of liquid in crevice is very little, and it is laminar flow, the flow is treated fixed continuous flow at every instant position of plunger, equation of motion and boundary condition were set up in condition of concentric and eccentric of pump barrel and plunger
運用非牛頓流體力學理論和數理方法，結合抽油泵柱塞運動特點，假設液體為不可壓縮的，液體在縫隙中流動的水力半徑很小，呈層流流動，柱塞在每一位置的瞬間，流動做定常流處理，建立了泵筒與柱塞同心和偏心兩種情況下運動方程和邊界條件，引入無量綱坐標、無量綱速度和柱塞與泵筒偏心配合時的縫隙高度，並給出縫隙流流速、流量的解析解。An analysis of the position of interference fringe in the experiment of newton ' s ring
對牛頓環實驗中干涉條紋位置的分析Most of stephen hawking ' s innovative thinking occurs at cambridge, where he is lucasian professor of mathematics, a seat once occuplied by isaac newton
斯蒂芬?哈肯的創造性思想中的大部分出現于劍橋，在那兒他是拉卡斯數學教授，一個曾經為伊撒克?牛頓所擔任的職位。In this section we depart briefly from the subject of newton's laws to discuss the question of units.
在這一節中，我們暫時離開牛頓定律來討論一下單位問題。For both newtonian flow and non - newtonian flow, the vortices are generated when the waviness of the bottom profile is beyond a critical number. by increasing the waviness, a second vortex can be generated. with the increasing of reynolds number, the symmetry of the streamlines at re = 0 is destroyed and the vortices are sloped and become larger
當波形板的波動度超出臨界值，波形板壁面上的流動出現流線分離，流動中有渦生成;增大波動度，流動中出現第二個渦; re = 0 ，流線在流場中對稱分佈;雷諾數增大，流線駐點在水平方向出現位置偏移，渦的范圍增大;對于非牛頓流體，隨著剪切變稀指數的減小，渦的作用范圍減小。Set up the position and pose positive solving equation. because of the difficulty of the positive solving equation, using newton iterative method, one of the mathematical analysis methods, is an easy way to solve this equation
建立了機構的正解方程，由於並聯機構的位姿正解比較難，因此採用數值分析方法中的牛頓迭代法進行求解。Actually, this is to resolve an over - determined nonlinear system including six output values and eight input values. so newton - gauss iterative algorithms is used, set up the target function in the sense of the least squares. it is discussed whether the minimal solution to the function exist and is single one while the astringency of newton - gauss method is analyzed
對于冗餘驅動振動臺，其位姿正解是求解具有八個輸入、六個輸出的超定非線性方程組，因此本文採用了最小二乘法中的牛頓?高斯迭代法，建立最小二乘目標函數，對目標函數極小解的存在性、唯一性以及牛頓?高斯迭代法的收斂性進行了理論證明和分析，將求出的最小值作為位姿正解的最優解。Based on prandtl ' s momentum transportation, this paper calculates in detail the physical quantities such as eddy viscosities, and ratio of eddy viscosity to motion viscosity, total stresses with respect to relative position in three regions of viscous sub - layer, buffer layer, and main turbulent stream for non - newtonian fluid flowing turbulently in ducts, which according to karman ' s three layer models and measurement of fluid parameters in evaluation apparatus, discusses the influence of polymer drag reduction on flowing properties of non - newton fluid, analyzes quantitatively principle of turbulent reduction phenomenon and condition of increasing reduction rate
摘要以普蘭德動量傳遞理論為基礎，按照卡門的三層模型，通過室內模擬環道用0號柴油及加入減阻劑在圓管內的流動參數的測定，計算了非牛頓型流體管內湍流邊界層的層流內層、過渡層、湍流中心的渦流粘度，渦流粘度與運動粘度比、總應力隨相對位置的變化等定量參數，探討了高分子減阻劑對非牛頓流體流動特性的影響，對湍流減阻現象的機理與增大減阻率的條件進行了定量分析。The si unit of force is the newton, n, which is derived from the si base units of mass ( kilogram ), length ( metre ) and time ( second )
力的米制單位是牛頓（ n ） 。牛頓是引伸自質量（千克） ，長度（米）及時間（秒）的三個si基本單位。牛頓是使一千克質量的物體產生1ms2加速度的力。The many - body potential ( eam potential ) is applied to describe the interaction of the atoms in the code. the parameters, such as position, velocity etc, are obtained by solving the newton equations of motion
它採用多體勢（嵌入原子勢）描述原子間的相互作用，通過求解牛頓運動方程來獲得原子的位置、速度等物理參量。French economist mentioned that an every - three - year change in the modern human society is equal to the every - thirty - year one at the beginning of last century, the every - three - hundred one in the era of newton or the every - three - thousand one at paleolithic age
曾有1位法國經濟學家進行過1次估算，他認為現在我們人類社會每3年發生的變化，相當於前世紀初30年的變化，又相當于牛頓時代以前300年的變化，更相當于舊石器時代3 ， 000年的變化。A french economist mentioned that an every - three - year change in the modern human society is equal to the every - thirty - year one at the beginning of last century, the every - three - hundred one in the era of newton or the every - three - thousand one at paleolithic age
曾有1位法國經濟學家進行過1次估算，他認為現在我們人類社會每3年發生的變化，相當於前世紀初30年的變化，又相當于牛頓時代以前300年的變化，更相當于舊石器時代3 ， 000年的變化。Despite losing player of the year elliott to a career - ending injury early in the new season, the first year of the premier league, a team that was now coached by the experienced don howe and had several homegrowns to the fore - including frank sinclair, david lee, gareth hall, graham stuart, graeme le saux and eddie newton - rose as high as fourth in the table by mid - december, playing some of the best football seen at the bridge for several seasons
在英超成立的第一個賽季中，盡管我們的年度最佳球員埃里奧特由於過早的受傷被迫結束球員生涯，但球隊中唐.豪伊（后來也成為了切爾西的教練）這樣的球員頂著，同時俱樂部的自己培養的球員諸如辛克萊爾、大衛.李、霍爾、斯特亞特、勒索克斯、埃迪.牛頓也表現出色，球隊在12月中期曾攀到聯賽第四的位置，打出了那幾個賽季中最為精彩的狀態。Applying the computer program developed by this paper, and choosing the real values of the gear transmission, this paper has completed more than 50 sets of calculations of the thermal elastohydrodynamic lubrication based on the non - newtonian fluid. the following conclusions can be drawn according to the computational results : 1, when the gear teeth are engaged at the pitch point, the changes of both the gear rotational speed and the load have little influence on the pressure distribution and the film shape, but they have large influence on the film temperature distribution
應用本文研發的計算機程序，選用齒輪傳動的實際參數，先後進行了50餘組的基於非牛頓流體的熱彈流潤滑計算，所得的主要結論如下： 1 、當齒輪在節點嚙合時，齒輪轉速及載荷的變化對壓力分佈口太原理工大學碩士學位論文和油膜形狀的影響不大，但對溫度分佈有明顯的影響。Based upon the measured displacement in situ, the algorithm of identifying material parameter is proposed for rock and concrete with modified gauss - newton method
基於位移原形觀測資料，採用修正的高斯-牛頓演算法求解最小二乘問題識別混凝土和巖石介質的彈性模量。The study state of art and development trend of structural damage identification research is simply summarized in this paper. hilbert - huang transform ( hht ) is applied to the damage identification and intrinsic frequency confirmation of time - variable structures. furthermore, a kind of inverse calculation is presented to calculate structural stiffness. this method can solve three main problems : the time that damage occurred, the location and the degree of damage
本文簡要總結了結構損傷識別領域的研究現狀和趨勢，圍繞損傷引起固有頻率變化這個特徵，將希爾伯特?黃變換（ hht ）應用於時變結構的損傷識別和損傷前後固有頻率確定上，並結合牛頓迭代法，對結構剛度進行反演計算，從而解決結構損傷識別領域所關注的三個主要問題:損傷發生時間、損傷位置以及損傷的程度。The full potential equation is solved by the time - accurate approximate factorization algorithm and internal newton iterations, and the euler equation by the finite - volume resolution scheme and dual - time stepping
對全位勢方程採用精確隱式近似因式分解差分格式、牛頓內迭代演算法。對euler方程採用有限體積法和雙時間推進。Based on interval the computation cost of interval newton algorithm is larger than the general newton iteration method. the computation time of interval newton algorithm tends to grow exponentially with the dimension. even for small problems, interval newton algorithm often requires enormous computation time if the nonlinearity of the problem is very large or the problem is ill - conditioned
但是由於區間牛頓法是以區間為迭代單位，其計算量遠大於一般的牛頓類迭代法，其計算時間隨著方程組維數n的增加而呈指數增長；而且即使在維數n很小時，若方程組的非線性程度很強或方程組為病態，所需的計算時間也很大。分享友人