著粒密度 的英文怎麼說
中文拼音 [zhāolìmìdù]
著粒密度
英文
density of grain setting-
Results show that : ( 1 ) for each particle size of andalusite, variation tendency of the properties of the material is generally the same : the maximum of bulk density, compressive strength and rupture strength appears in the range of 5 % - 10 % content of fiber, these properties of the material remarkably decrease as the fiber content exceed 10 % ; while at the same fiber content, the properties of the material increase with the increase of firing temperature
結果表明: ( 1 )對于不同粒度的原料,性能變化規律大致相同:在同一燒成溫度下,體積密度、常溫耐壓強度、常溫抗折強度在5 10之間出現峰值,加入量超過10之後材料的性能明顯下降;在相同的纖維含量下,隨著燒成溫度的提高,試樣的各項性能均有所上升。In this paper, we focus on the following three topics : ( i ) density distribution of dusty plasma in the low - pressure collisionless positive column the radial density distributions of electron, ion and dust particle in the low - pressure collisionless positive column are investigated with a fluid theory and a self - consistent dust - charging model
本文著重以下三個方面的研究: ( )低氣壓無碰撞輝光放電正柱區塵埃等離子體密度徑向分佈本文採用流體模型和自洽的塵埃充電模型,研究了低氣壓無碰撞輝光放電正柱區的電子密度、離子密度和塵埃粒子密度的徑向分佈。Having investigated composites of ep coating ultramicro iron using atpu as surface agent, results showed that with increasing amount of atpu, density, complex permittivity ( ) and complex permeability ( ) of composites decreased, and retentivity and coercivity increased
用atpu作表面活性劑制備核殼結構復合粒子時,隨著復合時atpu用量的增加,復合粒子的密度、復介電常數( )和復磁導率( )逐漸減小,剩磁與矯頑力逐漸增大。It is firstly found that for alloys in metastable region, with enhancement of atomic interaction energy, volume fraction and density of " phase particulate are increased, size and nucle ' ation rate of ordered phase raised, decline pace of composition in disordered matrix around the order phase is accelerated, composition order parameter and long range order parameter of ordered phase increased, i. e. process of clustering and ordering are accelerated
首次發現,隨著原子間相互作用勢的增加,亞穩區合金中有序相的體積分數和顆粒密度有所增加,有序相的尺寸和形核率有所提高,有序相周圍的無序基體濃度的降低有所加快,有序相內的成分序參數和長程序參數有所提高,即促進了原子簇聚過程和有序化程度。The entropy or number of states of system or subsystem are closely related to interaction of particles and energy level distribution, therefore, to study the temperature dependence of the specific heat may supply some important and useful microscopic information which may play an important role in understanding electronic structure, density of state, phonon spectrum etc. the specific heat measurements at low temperatures also play important roles in the finding of the third law of thermodynamics, the quantum theory of solid and bcs theory for superconducting etc. moreover, specific heat measurements help us to understand the different kinds of phase transitions ( such as : structural phase transition, magnetic phase transition, superconducting phase transition etc. ) and the scaling behavior near the critical point
系統、子系統的熵或微觀狀態數與微觀粒子間的相互作用及能級分佈密切相關,因此研究比熱與溫度的依賴關系能夠提供被測量系統許多極其有用的微觀信息,對理解固體的電子結構、電子態密度、聲子譜等起著十分重要的作用。低溫比熱的測量和研究對熱力學第三定律、固體量子理論和超導bcs等理論的建立起到了積極的推動作用。比熱研究還有助於認識各類相變如結構相變,磁性相變,超導相變等及臨界點附近的標度規律。A monte carlo algorithm was presented to model the relation between the scattering phenomenon, depolarization changes and sea water depth, it is discovered that the radius of scattering point and the degree of depolarization increase with increasing of the sea water depth. at last, a optical engineering software ( lighttools ) is introduced to simulate optical scattering in the deep sea water, and studys the corelation between scattering and relative refractive index, particle density and particle size in the sea water. the experiment results show that the intensity of scattering will increase evidently with the increasing of particle size, particle density and relative refractive index. the methods and results in the article provide the basic theory and experiment validation for improving performance of communication, detection and imaging under sea water
本文以球形粒子的mie散射理論、 stokes矢量法以及mueller矩陣來研究海水的散射特性和散射中的退偏振度變化;通過montecarlo方法模擬藍綠激光在海水傳輸過程中的散射現象以及散射中的退偏度變化與海水深度的關系,發現隨著海水深度的增加,散射后的光斑半徑、退偏振度將逐漸增大。最後通過光學工程軟體( lighttools )對海水中的散射進行模擬實驗,研究散射與海水中粒子密度、粒子大小和相對折射率的關系。實驗結果表明,隨著粒子半徑、粒子密度和相對折射率的增加,散射的強度將顯著增加。Anthropogenic activities ( e. g. development, over - grazing, timber harvest ) can disrupt the structural integrity of oasis - desert landscapes and is expected to impede diversity communities across the landscape and make it fragmented. with human dimension and activities enhancing, the patchiness grain, edge density and landscape contrast become large, landscape diversity and patch fractal dimension decreased
隨著人類活動的增強,斑塊粒度、邊緣密度、分散度、對比度變大,而景觀多樣性下降,斑塊分維數變小,人類生產經營活動導致了綠洲-荒漠景觀破碎化,綠洲和荒漠生態系統界面上的突變性、對比度和異質性增強。The x - ray diffraction, scanning electronic microscope and the squid were used to characterize the properties of the mgb2 core in mgb2 / fe tapes and wires. the effect of the proportion of mg, b and sic as well as the sintering parameters on the phase formation, microstructure and the critical current densities of mgb2 / fe tapes and wires was discussed in details. the results showed that the high purity of mgb2 core could be synthesized by both the traditional vacuum sintering and the sparking plasma sintering and the vacuum sintering environment restrained the oxidation of mg effectively
相對于傳統真空燒結, sps燒結方式成相速度快、樣品晶粒細小均勻、 mgb2超導芯緻密性好、晶間連接優良,因而sps燒結樣品的臨界電流密度明顯高於傳統真空燒結樣品,其中未摻雜的帶材樣品經過sps800 , 15分鐘燒結后,自場下的臨界電流密度jc值在10k時達到8 . 64 105a / cm2 ,而且隨著測量溫度和外加磁場的增加, sps燒結樣品的臨界電流密度下降率比傳統真空燒結樣品緩慢,在20k ,自場時為5 . 97 105a / cm2 , 20k , 3t時,臨界電流密度值仍大於104a / cm2 。By increasing the h2 dilution ratio, it is found that atomic hydrogen can selectively etch amorphous phase and stabilize crystalline phase. from the study on the distance from substrate to catalyzer, choosing a proper distance can ensure the gas fully decomposed, while a relatively low substrate temperature can cause the nanocrystalline particles to lose mobility and keep their sizes. the pre - carbonization process can enhance the nucleation density and make the growth of high quality nanocrystalline p - sic films much easier
實驗結果表明:隨著工作氣壓的減小,薄膜的晶粒尺寸有所減小;通過提高氫氣稀釋度,利用原子氫在成膜過程中起的刻蝕作用,可以穩定結晶相併去除雜相;選擇適當的熱絲距離能保證反應氣體充分分解,又使襯底具有較高的過冷度,是形成納米薄膜的重要條件;採用分步碳化法可以提高形核密度,有利於獲得高質量的納米- sic薄膜;襯底施加負偏壓可以明顯提高襯底表面的基團的活性,因負偏壓產生的離子轟擊還能造成高的表面缺陷密度,形成更多的形核位置。The results are as follows : grain number per panicle, seed density, secondary branch number, secondary branch grain number, secondary branch grain rate are significantly positively correlated with rice yield, & the yield is affected by all of them
產量與每穗粒數、著粒密度、二次枝梗數、二次枝梗粒數、二次枝梗粒率呈極顯著的正相關關系,這些性狀對產量都有積極意義,產量是其綜合作用的表現。To make pic ( particl - in - cell ) simulations. to set up models of guns and magnetic field and simulate them in the vacuum and plasma, respectively. we found that plasma held back part of space charge effects and improved trajectory of electrons. but beam would oscillate and became instable as accretion of plasma density. by simulating again and again, we draw a conclusion magic could n ' t work when plasma density was more by far than beam electron density. at last a four - stage depressed collector was simulated
建立電子槍和聚焦系統模擬模型,分別在真空和填充等離子體條件下進行模擬。發現填充等離子體能補償部分空間電荷效應,改善電子束包絡軌跡,提高電子的流通率,但是隨著等離子體密度的增大,束電子會出現振蕩不穩定性,遺憾的是通過反復多次模擬發現本文所用粒子模擬的代表性軟體magic無法用於模擬等離子體密度遠高於束電子密度的情況。The isospin effect and k production in intermediate and high energy heavy ion collisions ( hics ) are hot topics in the nuclear physics. based on the isospin - dependent quantum molecular dyanmics ( iqmd ) model and self - consistent relativistic boltzmann - uehling - uhlenbeck ( rbuu ) model, we have studied them and obtained some interesting results. as for the study of isospin in intermediate energy hics, we ' ve investigated how both stength ( q ) and density dependence of symmetry potential ( sp ) affect many measurable observables, such as the yield, phase - space, and isospin distributions of fragments, as well as the correlations between intermediate - mass - fragment ( imf ) multiplicity n and charged - particle multiplicity n, light - charged - particle ( lcp ) multiplicity n, and neutron multiplicity n,
在中能重離子碰撞的同位旋研究方面,分別研究了對稱勢的強度( c _ s )和其密度依賴形式對中能重離子核反應各類碎片產物產額、相空間、及其同位旋的分佈,中等質量碎片多重數( n _ ( imf ) )與帶電粒子多重數( n _ c ) 、輕帶電粒子多重數( n _ k ) 、中子多重數( n _ n )的關聯等多種實驗觀測量的影響,以獲取對稱勢中該兩方面的信息,尤其著重於研究如何分別獲取有關該兩方面的信息的途徑。Aminobenzenesulfonic acid super - plasticizer is selected though cement paste test, which be provided with high water - reducing property, low slump loss and good compatibility with cement. according to the request of super high early strength, admixture rf is obtained though tests to compare performances of different accelerators and admixtures. experimental research and analysis are carried out on coarse aggregate ' s grain - size effect and composite aggregate ' s bulk - density to take sensitivity of coarse aggregate into account
通過水泥凈漿試驗比較選擇了減水率高、坍落度損失小、與水泥適應性好的氨基苯磺酸鹽高效減水劑;針對超早強的性能要求,試驗比較了不同早強劑及早強性摻合料的性能表現,研製了早強性能顯著、與高效減水劑和水泥相容性較好的rf摻合料;考慮到修補混凝土對粗集料粒徑的敏感性,對粗集料粒徑效應及混合集料堆積密度進行試驗研究與分析;並對修補混凝土的抗折、抗壓、新老界面粘結強度以及抗凍性等進行了試驗研究。The variance of seed setting density and 1000 - seed weight of the different diploid seed plants is highly significant, but it is not significant in the different source of the same line
不同品系的二倍體種株材料在結實密度和千粒重之間的差異性也分別達到0 . 01的極顯著水平,但同一材料的不同母根之間差異性是不顯著的。The highest sintering temperature got higher and the speed of temperature became faster, with the fining of the powder particle size or the increase of the microwave source ' s power or the decrease of the green compact ' s volume. the sintering time became shorter, with the fining of the powder particle size or the decrease of the microwave source ' s power or the increase of the green compact ' s volume
隨著功率的提高,燒結的最高溫度上升、燒結時間延長、升溫速率略有提高;隨著粒徑的減小,燒結的最高溫度上升、燒結時間縮短、升溫速率明顯提高;隨著初坯體積增大,則燒結的最高溫度下降、燒結時間縮短、升溫速率降低;初坯的密度對燒結過程影響不大。Secondly, the effect of transverse deforming on the property of the wedge pressing was studied. the results showed that : the wedge pressing stock with the transverse deforming amount of 10 % acquired the best performance. the highest density got the biggest rate of slope while with the amount of 30 % the curve was more some special structure and performance as following : the large porosities was crushed into small or linear ones with the high - direction deformation amount of 20 % ; as the increasing of the high - direction deforming, the particles got a further deforming, the porosities got a further crushing, the small porosities were mergered by the large ones and the former then disappeared ; when the amound reached 60 %, the quantity of the porosities would obviously decrease which made the materials compact, the microstructure more uniform and the density and hardness curves more horizontal, the relative desity could reach 99. 7 %, the tensile strength b of the as - compacted samples reached 408mpa with the yield strength s teached 289mpa and the elongation percentage reached 13. 6 %. in addition, the microstructure of the wedge pressing stock under the pressing temperectureof 450 was uniform, the porosities and the boundries of the grains basically disappeared and the conjunction between particles was great
採用雙向楔形壓制,大尺寸噴射沉積5a06鋁合金楔壓坯的組織和性能變化具有如下特點:當高向變形量為20 %時,大的孔洞變形破碎為小的孔洞,或呈線狀孔;隨著高向變形量的增加,顆粒進一步變形,孔洞進一步破碎,大孔「吞併」小孔,小孔塌陷並逐步消失;當高向變形量達到60 %時,孔洞量大為減少,材料基本緻密,組織趨于均勻,楔壓坯料的密度、硬度變化曲線接近水平線,坯料的相對密度達99 . 7 % ,抗拉強度_ b = 408mpa ,屈服強度_ ( 0 . 2 ) = 289mpa ,延伸率= 13 . 6 % ;對比其它的壓制溫度,在450楔形壓制的坯料組織均勻,孔洞及顆粒邊界基本消失,顆粒之間冶金結合良好。The physical properties of cerarnics are ciosely related to their microstructure such as the grain scale, grain boundny, grain orientation, etc. it ' s helpful for the development
陶瓷的物理性能與其相應的微觀結構之間存在著密切的相互聯系,如晶粒尺度、晶界、晶粒取向等都對物理性能有影響。Changing the grading of sic particles not only affects the strength and pile density, but also modifies the phase compositions and microstructure of the material. with the reducing of sic particles, the strength of the material increases obviously. the nitrification scheme has the greatest influence on phase compositions and microstructure " of si3n4 ( si2on2 ) - sic, after two continuous nitrification reacting peak and short - time high - temperature treating, the best properties can be obtained ; and the residual strength of the composite is much higher after the thermal shock resistance test, which shows that the material possesses excellent thermal shock resistance
本論文較全面地探討促進強度和顯微結構良好的si _ 3n _ 4 ( si _ 2on _ 2 )結合相的實驗條件,實驗數據顯示:引入適量的燒結助劑能夠促進si _ 3n _ 4 ( si _ 2on _ 2 )的生成和晶粒的長大,而過量時,其促進作用反而下降;隨著si粉加入量增加,生成的結合相明顯增多,復合材料的性能顯著提高;改變sic顆粒級配不僅影響復合材料的強度與堆積密度,而且對復合材料的物相與顯微結構也有影響,隨著顆粒逐漸細化,材料的強度有較大的提高;對復合材料的強度、物相與顯微結構影響最大的是氮化制度,經過兩個氮化高峰連續的反應和短時間的高溫后處理得到的復合材料性能最好;通過抗熱震性能實驗后復合材料的殘余強度較高,顯示出較好的抗熱震性能。L were studied. during the meiotic process of megasporocyte, the ribosome population diminished greatly in prophase i and restored in metaphase i ; plastids and mitochondria turned unclear dedifferentiation in prophase i and recovered their normal structures redifferentiation in metaphase i. all these proved that cytoplasmic reorganization took place during the megasporogenesis of
發現了小麥大孢子母細胞減數分裂過程中,核糖體密度在前期顯著降低,到中期才完全恢復質體和線粒體也出現了脫分化和再分化。從而證明了小麥的大孢子形成過程中也存在著細胞質改組現象。The shape of model sand particle play an important role in submarine rest angle, starting speed, bulk specific weight and some other physical characters
摘要顆粒形貌對模型沙的水下休止角,起動流速、堆積密度等性能有顯著影響。分享友人