point particle 中文意思是什麼
point particle
解釋
質點-
The development of adscititious particle reinforced aluminium matrix composites and al matrix in - situ composites reinforced by reaction synthesis " reinforcement phase are reviewed at first. and the papers point out the difficulties and problems on the study of al matrix composites at present
本文首先回顧了外加顆粒增強鋁基復合材料和反應合成強化物增強鋁基原位復合材料的研究進展，指出當前鋁基復合材料研究中存在的問題。 -
The probability of finding the particle in the volume element at point(x. y. z. )with edges dx. dy. dz is as follows.
在點（xyz）具有邊dx，dy，dz的體積元內找粒子的幾率如下。 -
A particle has no extent so that its position is a point.
質點沒有廣度因此它的位置是一個點。 -
" when a particle beam is directed toward a point on the surface, the gold atoms bounce off and expose the silicon layer underneath just like a hammer and chisel, " zohar said
當粒子光束被導向于矽片表面的某一點，金原子反彈，露出底下的矽層，就像是鐵?與鑿子的作用，左哈爾說。 -
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。 -
Based on the topographic features and data of sediment particle size of bed load at the fluctuating backwater reach of liujiaxia reservoir, the streamwise variation and variation process of median diameter of bed load during silting and scouring periods of the fluctuating backwater reach are analyzed, and it can be seen that the turning point for the sediment diameter variation from coarse to fine is located at the outlet of shigou gorge of the fluctuating backwater reach
摘要根據劉家峽水庫變動回水區的河段地形特徵和歷年河床質泥沙粒徑級配資料，分析了變動回水區河段淤積和沖刷時，河床質泥沙中值粒徑的沿程變化和歷年河床質泥沙中值粒徑變化過程，並指出粒徑分佈由粗變細的轉折點在變動回水區寺溝峽峽口處。 -
Particle - carrying air enters the bag filter via the inlet, passing through a stopper ; at this point, heavier powders settle first, while lighter powders attach to the filter evenly ; the plc then controls the electromagnetic valve to trigger the membrane valve for input of pressurized air, which passes the venturi tube to flush the filter by shaking off powders into the collection chute, whereas the clean air passes through the filter to be released by the fan
控制電磁閥導引膜片閥輸入壓縮空氣，使其通過文氏管對濾袋進行噴洗，使得附著于濾袋四周之粉塵震落於集灰槽內，而乾凈空氣則穿透濾袋藉由送風機排出。 -
An ocean wave passing through deep water causes a particle on the surface to move in a roughly circular orbit, drawing the particle first towards the advancing wave, then up into the wave, then forward with it and then ? as the wave leaves the particles behind ? back to its starting point again
穿過深水的海浪使水面上的一個微粒按照一種近乎圓形的軌道移動，先把微粒拉向前移動的海浪，然後推上波浪，隨著波浪移動，然後? ?當波浪把微粒留在身後時? ?又回到出發點。 -
This paper proved that the azimuth shift of a particle or a rigid body to a point or line is of the feature of kinematics and dynamics, indicating that rotation does not mean the motion of “ turning around ” only
通過證明質點或剛體只要相對于點或線的方位發生變化，也就具有相對于該點或該線的轉動運動學、動力學特徵，說明「轉動」包含的不僅僅是「轉圈圈」的運動 -
The sheet structure of pvc was found in the rupture partical of pvc. the nanocrystalline pvc formed through jet - mill crashing. different crash condition had effect on particle morphology and melting point and crystallinity and particle size distribution
納米晶pvc是由氣流磨粉碎形成的，不同的粉碎條件對納米晶pvc的顆粒形態、熔點、結晶度、粒徑分佈形成不同的影響。 -
Particle ratios embody the chemical equilibrium driven by inelastic interaction during rapid expansion when the temperature decreases in the colliding system, the measured hadron ratios provide the chemical composition of the fireball at the chemical freeze - out point and access the baryon transporter stopping ) for the initial conditions at early stage of the collisions. in this paper, we study the anti - proton to proton ratio from ig7au + 197 au collisions, analyzing p / p ratio as functions of rapidity, transverse momentum and centrality at ^ / saw = 200gev and the dependence on the center of mass energy of p / p ratio, compared with the experimental results. it shows that the p / p ratio has n ' t obvious dependence on rapidity for mid - rapidity, but shows a slight increase trend with pt increasing in the range of pt < 1gev / c for mini - bias or central collisions, and rqmd shows a more remarkable correlation between p / p ratio and centrality than experiments do at snn = 200gev
研究表明：對廠在中心快度區沒有明顯的快度依賴性，在越靠近邊緣快度區， p p呈下降趨勢；在對心碰撞或者最小無偏事件中， p p在低橫動量區域隨著橫動量的升高而增大； p隨著碰撞對心度的比實驗結果表現出稍強的隨對心度增大而減小的趨勢，尤其是有再散射ujrqmd模型；在中心快度區， p p隨著碰撞的質心能量的提高而快速的增大，與實驗結果一致；在低能，有末態粒子再散射的d較好的預言了的：但是在mc能量下，有末態粒子在散射的d所預言的p p值比實驗值要小。 -
Abstract : establishment of the macro dynamic mathematical models for coked zeolite catalyst coke burning regeneration was discussed from an engineering point of view. based on the modified particle - pellet model, dynamic mathematical equations for porous and nonporous catalyst coke burning regeneration were deduced, supplying a theoretical basis for computer simulation of coked zeolite catalyst regeneration
文摘:從反應工程學的角度討論了結焦沸石催化劑燒焦再生反應宏觀動力學數學模型的建立，根據已提出的修正的顆粒-粒子動態等溫物理模型，分別推導出了多孔焦炭的燃燒再生階段數學方程和無孔焦炭的燃燒再生階段數學方程，為結焦沸石催化劑再生反應過程計算機模擬提供了理論依據。 -
This paper confirms a kind of non - linear mapping relation between vibration velocity of particles on building and the influence factors, such as total explosive charge, maximum explosive charge fired at the same time, the distance between blasting point and monitoring points, peak particle velocity of ground where building is, the height from monitoring point to ground, and so on, and sets up a support vector machine ( svm ) model for forecasting the vibration effect induced by an explosion
應用支持向量機，建立了總藥量、最大段藥量、爆破點與監測點距離、構築物所在地面震動峰值速度、測點到地面的高度等因素與建築物上的質點震動速度之間的非線性映射關系，確立了支持向量機預測模型。 -
During the initial pan - milling period ( 1 - 5 milling cycles ), a sudden particle size reduction was observed, which can be described by " avalanche " pulverizing mechanism, i. e., large amount of energy caused by pan - milling press force accumulated in deformable polymers to a critical point and then the deformed polymer flakes suddenly collapsed to small particles by shear force
結果表明，在碾磨初期（ 1 5碾磨循環） ，聚合物粒子的粒度有一個驟降過程，是磨盤強大擠壓力場作用於塑性材料引起的能量積累達到其破壞極限后引起的突然破碎，可用均一粉碎機理描述。 -
Abstract : it was deduced that the shapes of magnetic particle indicationsof point - type defects on workpiece surface depended on the resistance of carrier medium, and their dimensions depended on the volume of the defect equivalent cuboid, the magnetising characters of workpieces and magnetic particles, the strength of magnetic field, the lengths and sections of magnetic particles and the resistance character of carrier medium
文摘:推斷出工件表面點狀缺陷磁痕的形狀取決于磁粉載體的介質阻尼力，磁痕大小取決于缺陷等效長方槽的體積、工件和磁粉材料的磁化特性、磁場強度、磁粉長度和橫截面積以及載體介質的阻尼特性等。 -
The general situation and progress of magnetic dipole theoryresearch during recent twenty years in china were introduced briefly including magnetic dipole ; linear and strip magnetic dipoles of finite lengths ; magnetic force on a magnetic particle ; the effect of magnetizing field orientation on the revelation of defect by magnetic particles ; longitudinal magnetization of rod, tube and cuboid steel ; the relationship between the slot depth in a workpiece and magnetic leakage field ; the cause of stray magnetic pattern along base apex edges of a workpiece magnetized circumferentially ; the analytic expression for the magnetic leakage fields inside and outside the slot on the cylindrical surface of a disc ; and the effect of a needle - like magnetic medium on the magnetic force between two point magnetic charges
簡述20年來中國無損檢測中磁偶板子理論研究的概況和進展，主要介紹磁偶極子，有限長磁偶極線和極帶，磁粉顆粒的受力，磁化場方向對磁粉顯現缺陷的影響，棒料、管材和方鋼的縱向磁化，工件表面溝槽深度對其引起漏磁場的影響，周向磁化時工件底棱上的雜亂顯示成因，圓盤邊緣柱面上溝槽內外漏磁場的解析表達式和針狀磁介質對兩個點磁荷間磁力的影響等。 -
The simulation results of a batch process shows that the iterative particle swarm algorithm can solve the robust optimization problems of batch processes effectively if there is no state independent and end - point constraints
對一個間歇過程的模擬結果證明了迭代粒子群演算法可以有效地解決無狀態獨立約束和終端約束的間歇過程魯棒優化間題。 -
An iterative particle swarm algorithm is proposed for the robust optimization problem of hatch processes without state independent and end - point constraints, which combines the iteration method and the particle swarm optimization algorithm together
摘要針對無狀態獨立約束和終端約束的間歇過程魯棒優化問題，將迭代方法與粒子群優化演算法相結合，提出了迭代粒子群演算法。 -
This paper with the actual needs of metal physical doping of icf target material and laser - x - ray conversion material is starting point, major for flow - levitation method principle, technology parameter control particle grain size, structure and thermal stability of phase composition that prep aration metal and alloy nanoparticle go deep into research. the principle of preparation metal nanoparticle by flow - levitation method is difference with other evaporate condensation method
本文以icf靶材料金屬物理摻雜和激光- x光轉換材料的實際需要為出發點，主要對自懸浮定向流技術制備金屬與合金納米微粒的原理、過程和工藝參數控制微粒粒徑大小，所制備納米微粒的結構、物相組成以及組成相的熱穩定性等方面進行了深入研究。 -
Abstract : the general situation and progress of magnetic dipole theoryresearch during recent twenty years in china were introduced briefly including magnetic dipole ; linear and strip magnetic dipoles of finite lengths ; magnetic force on a magnetic particle ; the effect of magnetizing field orientation on the revelation of defect by magnetic particles ; longitudinal magnetization of rod, tube and cuboid steel ; the relationship between the slot depth in a workpiece and magnetic leakage field ; the cause of stray magnetic pattern along base apex edges of a workpiece magnetized circumferentially ; the analytic expression for the magnetic leakage fields inside and outside the slot on the cylindrical surface of a disc ; and the effect of a needle - like magnetic medium on the magnetic force between two point magnetic charges
文摘:簡述20年來中國無損檢測中磁偶板子理論研究的概況和進展，主要介紹磁偶極子，有限長磁偶極線和極帶，磁粉顆粒的受力，磁化場方向對磁粉顯現缺陷的影響，棒料、管材和方鋼的縱向磁化，工件表面溝槽深度對其引起漏磁場的影響，周向磁化時工件底棱上的雜亂顯示成因，圓盤邊緣柱面上溝槽內外漏磁場的解析表達式和針狀磁介質對兩個點磁荷間磁力的影響等。
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