But in the forepassed research, the people all abstracted the colloid in the water as the sphericity and explained it by the known theory of the colloid chemistry. moreover some people modified the result by the grain coefficient in the derivation of theory. but this assume had more difference on the observed phenomena in the experiment, so it was not perfect in theoretical speaking
關于絮凝的理論基礎在國外研究得比較多,但在過去的研究中,人們大都是將水中的膠體
顆粒抽象為
球形,用已有的膠體化學理論去加以解釋,並在理論推導中引入
顆粒系數加以修正,這與實際實驗所觀察到的現象有較大的差別,從理論上說,是很不完善的。
Of the eons of geological periods recorded in the stratifications of the earth : of the myriad minute entomological organic existences concealed in cavities of the earth, beneath removable stones, in hives and mounds, of microbes, germs, bacteria, bacilli, spermatozoa : of the incalculable trillions of billions of millions of imperceptible molecules contained by cohesion of molecular affinity in a single pinhead : of the universe of human serum constellated with red and white bodies, themselves universes of void space constellated with other bodies, each, in continuity, its universe of divisible component bodies of which each was again divisible in divisions of redivisible component bodies, dividends and divisors ever diminishing without actual division till, if the progress were carried far enough, nought nowhere was never reached
隱藏在大地的洞穴里和能移動的石頭底下蜂巢和土墩子中那無數微小的昆蟲類的有機生物:微生物病菌細菌桿菌精子憑著分子的親和之凝聚力而粘在一根針尖上那幾萬幾億幾兆個多不勝數肉眼看不到的微小
顆粒人類的血漿是一個宇宙,群集著白血
球和紅血
球,每個血
球又各自形成一個空虛的宇宙空間,群集著其他
球體各個
球體連續性地也是由可分割的構成體形成的宇宙,各個構成體又可以分割成為幾個能夠進一步分割的構成體。就這樣,分子與分母實際上在並未分割的情況下就不斷地減少了。如果這個過程延續到一定時候,就永遠在任何地方也不會達到零。
These pathogenic characteristics that could cause corm tissue to bring browning reaction, lignose of cell wall to increase, and faecula granule to decrease, were also observed by using tissue sectioning
用組織切片法觀察發現病菌能使香蕉苗
球莖組織產生褐變,引起細胞壁木質素增加及澱粉
顆粒減少。
The brightest star in the constellation cygnus, approximately1, 630 light - years from earth
天津四,天鵝星在天鵝座最亮的一
顆恆星,距地
球大約有1 , 630光年
A 13 - billion year old planet orbiting a pair of long - dead stars in a crowded globular cluster : even for the hubble space telescope, that ' s amazing
在一個擁擠的
球狀星團中,一
顆130億年的古老星
球正圍繞著一對死寂多時的星星而運行,這事連見多識廣的"哈勃"都驚嘆不已
C1o2 / tio2 granular composite the composite consists of acicular, conducting, ferromagnetic cro2 particles and spherical, insulating, diamagnetic tio2 particles
顆粒復合物這是針狀、導電的磁性croz
顆粒和粒徑比ca12大得多的、
球形且絕緣的非磁tio 。
A double star in the constellation gemini, the brightest star in the group, approximately46 light - years from earth
北河二雙子座中的一
顆雙星,是這組星中最明亮的一
顆,距地
球約46光年
The collaboration between china and brazil on the project of an earth resources satellite is making good progress, and the first such satellite was successfully launched by china on october 14, 1999
中國與巴西開展的地
球資源衛星合作進展順利。 1999年10月14日,中國成功地發射了第一
顆中巴地
球資源衛星。
When was china ' s first man - made earth satellite launched
中國的第一
顆人造地
球衛星是什麼時候發射的?
Another man - made earth satellite was put into orbit last month
上個月又一
顆人造地
球衛星被送入軌道。
China succeeded in launching its first man - made earth satellite in1970
1970年中國成功地發射了第一
顆人造地
球衛星。
Effective dielectric response of ellipsoid composites in which the dielectric function of the grains have the form of ( the equation is abbreviated ) ) embedded in a host medium is investigated in dilute limit based on perturbative expansion method, and general expressions for the effective linear dielectric function and ( - 1 ) - order nonlinear susceptibility of the two - phase system are derived in this paper
摘要利用微擾展開法討論了任意階弱非線性橢
球顆粒復合體系(假定
顆粒組分的介電函數隨場變化,表示為(方程式略) )的有效介電響應,導出了稀釋極限下兩組分橢
球顆粒體系的有效線性和有效( + 1 )次非線性系數的一般表示式。
Based on the theoretical contact mechanics, the numerical simulations demonstrated that the axial stiffness during compression was sensitive to both the amount of plastic deformation and the interparticle friction occurring at the contacts within the assembly of particles
研究發現:彈塑性
球顆粒系統在加載時其軸向剛度對
顆粒間產生的塑性變形量及
顆粒間的摩擦均很敏感。
Viscous force of squeeze flow between two spherical particles with power - law fluid
圓
球顆粒間有冪律流體時擠壓流動的法向粘性力
Finally, the application of the discrete element method with an interstitial fluid is discussed. for this purpose, a dynamic compacting process and a retaining wall problem are simulated by dem. it is shown that these problems can be qualitatively analyzed by dem
對存在填隙流體時離散元法的應用進行了初步探索,對塊石土強夯過程和擋土墻問題等進行了簡單的離散元模擬,可以看出採用存在填隙流體時球顆粒間的作用規律后,可以對一些問題定性分析。