Automatic generation of contour in 2d scalar fields and its programming 二維標(biāo)量場等值線自動(dòng)生成方法與程序?qū)崿F(xiàn)
To solve the equation instead of iterative algorithm with an indispensable initial value, the theory of extracting isocurve in two-dimension scalar field is used 利用該算法可以求出任意浮態(tài)下的船體與水線面的交線。
The simplest physical model for an appropriate dark energy component is a single slowly-rolling scalar field, sometimes referred to as quintessence 解釋黑暗能量最簡單的物理模型,是一個(gè)單一而緩慢滾動(dòng)的純量場,有時(shí)稱為真空場。
Cosmologists already ascribe cosmic inflation, and perhaps the dark energy ( distinct from dark matter ) that is now causing cosmic acceleration, to scalar fields 關(guān)于宇宙暴脹,以及引發(fā)宇宙加速膨脹的暗能量(有別于暗物質(zhì)),宇宙學(xué)者已經(jīng)將之歸因于純量場。
The distribution of physical quantity of 3-d scalar field of casting surface can be observed visually using the technique to display the 3-d scalar field 采用該技術(shù)來顯示鑄件各部位在凝固過程中各時(shí)刻的三維標(biāo)量場,可以直觀地觀察鑄件表面三維標(biāo)量場物理量的分布情況。
The distribution of physical quantity of 3-d scalar field of casting surface can be observed visually using the technique to display the 3-d scalar field 采用該技術(shù)來顯示鑄件各部位在凝固過程中各時(shí)刻的三維標(biāo)量場,可以直觀地觀察鑄件表面三維標(biāo)量場物理量的分布情況。
If a scalar field changes slowly, it resembles a constant, both in its fixed magnitude and in its lack of directionality; relativity theory predicts it will produce a gravitational repulsion 如果純量場變化緩慢,它就會(huì)有固定的大小,而且沒有方向性,就像一個(gè)常數(shù)一樣;相對論預(yù)測,這種情況會(huì)產(chǎn)生重力排斥效應(yīng)。
There are other models of dark energy besides those based on scalar fields . one scenario is " solid " dark matter, typically based on networks of tangled cosmic strings or domain walls 當(dāng)然亦有些黑暗能量理論模型并未引入純量場的觀念,其中一個(gè)假設(shè)是實(shí)黑暗物質(zhì)的存在,這些物質(zhì)可以是糾結(jié)的宇宙弦網(wǎng)絡(luò)或區(qū)域墻。
Abstract : a display technique of surface rendering was developed in order to display the numerical simulation results of 3-d scalar field physical quantity of the whole casting during solidification process visually and precisely 文摘:為了更直觀和準(zhǔn)確地顯示整個(gè)鑄件各部位在凝固過程中各時(shí)刻的三維標(biāo)量場物理量的數(shù)值模擬結(jié)果,設(shè)計(jì)了一種稱之為表面繪制的顯示技術(shù)。
With the aid of computer algebra system maple, the nonlinear algebra equations corresponding to the nonlinear coupled scalar field equations can be successfully solved this way, and eventually many exact solutions to it can be obtained 用這種辦法在計(jì)算機(jī)代數(shù)系統(tǒng)maple上成功地求解了非線性耦合標(biāo)量場方程組所對應(yīng)的非線性代數(shù)方程組,最終獲得了耦合標(biāo)量場方程組的眾多精確解。