查询词典 point particle

Based on the energy budget analysis of collisional dissipation, particle kinetic energy and particle potential energy, it shows that the main different between the effect of restitution coefficient and drag force on the heterogeneous flow structure is that the former effects the particle agglomeration chiefly and the later effects the bed height mainly.

从碰撞耗散、颗粒动能和颗粒势能的角度分析了二者的作用机理，发现恢复系数和曳力对流动结构的作用主要区别在于对颗粒团聚和床层膨胀的影响程度不同。

In Coulomb's Law, the force exerted on one charged particle by another is directed along the line connecting the two particles, and, away from the other particle if both particles have the same kind of charge (both positive, or, both negative) but, toward the other particle if the kind of charge differs (one positive and the other negative).

牛顿第二运动定律公式如下：。。。。在库伦定律中，由一个带电粒子所施加在另一个粒子上的力沿著连接两粒子的一条直线，如果两个粒子有同样的电荷则此力为排斥力，如果两个粒子有同样的电荷，则为吸引力。

The force exerted on one charged particle by another is directed along the line connecting the two particles, and, away from the other particle but, toward the other particle

C： 在库伦定律中，由一个带电粒子所施加在另一个粒子上的力是被指向连接两粒子的一条直线，与另一粒子反向，但朝向另一粒子

The making process includes: setting insulating solid film on one horizontal rotating carrier with particle detecting unit and etching with single particle beam in the incident angle of 9.6-90 deg to penetrate the film, shifting the film relatively to the single particle beam and etching for the next time, and so on until the film is rotated by one turn to obtain truncated cone shaped, double turned truncated cone shaped or cylindrical single nanometer hole.

本发明将固体绝缘薄膜置于带有粒子检测装置的一个可水平旋转的载体上，用单粒子束刻蚀该薄膜，单粒子束入射角大于等于9.6°、小于等于90°，并且单粒子束在该薄膜底部、顶部、或二者之间与薄膜旋转轴交叉，待单粒子束完全穿透该薄膜后，固体绝缘薄膜底部的粒子监测器反馈使该薄膜被穿透处与单粒子束相对移动1荆再刻蚀，如此反复，直至固体绝缘薄膜旋转一周，获得圆台形、双倒圆台形或圆筒形的单纳米孔。

Safety engineering ; fire detection ; aspiration tube ; smoke particle ; particle loss ; median particle size

安全工程；火灾探测；吸气式管道；烟颗粒；颗粒损耗；中位径

In this paper, the technical conditions of preparing TiO2 ultrafine particle used as photocatalyst by Radio Frequency Plasma Chemical Vapor Deposition is studied, then suggest some methods of controlling the size and crystal type of TiO2 particles. And with the existent equipment prepare TiO2 particle taking on varies size by controlling the flow velocity of Ar as loading gaseity in the system of TiCl4+O2. By characterizing we know the particle prepared is the mix type of rutile and anatase.

本论文探讨了高频等离子体化学气相淀积法制备光催化剂用二氧化钛粉体的工艺要求，提出了一些控制粉体粒径和晶型的方法，并以现有的实验设备为基础，在TiCl_4+O_2体系中，通过控制载气的流量制备出了不同粒径的二氧化钛粉体，通过表征可知所制粉体为金红石型和锐钛型的混晶体。

When other technics conditions are certain, we use the globosity aluminum powder of different particle diameter a to grind the flake of aluminum powder , with the particle diameter increase of the globosity aluminum powder, the particle diameter of the flake of aluminum powder will also become bigger immediately. 3, The ratio of grinding ball to aluminum powder is 20:1. 4,the grinding speed is 38 and 33 r.min alternate once h-our in the first 10 hours, and use the speed of 29 and24 per hour alternating revolving speed in the last 5 hours, this speed is fine to grind the flake of aluminum powder. 5, wet method ball-milling mainly adopt of help-milling agent as Bl. 6, influence of the research grinding time.

经系统的研究，得出如下结论：1、基本参数：采用200升球磨机，装入钢球200kg，原料铝粉：溶剂量=1：2，铝粉：钢球=1：20；2、当其它工艺条件一定时，用不同粒径的球状铝粉作为原料磨制片状铝粉，随着原料铝粉的粒径增大，所制得的片状铝粉的粒径也会随之增大。3、球料比我们控制在20：1.4、研磨前10小时采用速38和33r.min每小时交变一次，后5小时用29和24每小时交变的转速，这个速度是适宜磨制片状铝粉的。5、湿法球磨片状铝粉主要采用的助剂为复合助剂B1.6、研究研磨时间的影响。

The study indicates: the pore's and particle conglomerate's change are all linked together under load; with the load increasing, the arrangement of the particle conglomerate is developed to the immethodical state and the pore's directionality is better than the particle conglomerate's; through changing its own form and adjusting its arrangement under load soil mass transform piece by piece into the steadily load-bearing form and its deformation develop towards the trend that the deformation reduces.

研究结果表明：孔隙和颗粒集聚体的变化存在一定的关联性；随着荷载的增加，颗粒集聚体排列向着杂乱无序的方向发展，孔隙定向性优于颗粒排列；在荷载作用下，土体通过自身形态的变化，排列形式的调整，逐步向稳定的承载形式过渡，使变形向逐渐减小的趋势发展。

By solving a axial-symmetrical boundary value problem consisting of a infinite solid and an isolated spheriodal particle embedded in an infinite matrix, some interesting results are found as follow:(1) at the micron scale, the smaller the particle is, the higher the stresses at the matrix/inclusion interface and within the particle are;(2) this size effect is more remarkable with decreasing the stress triaxiality and increasing the remote equivalent strain.

通过对三轴应力下含椭球夹杂的无限大体边值问题的分析，结果表明：(1)在微米尺度下，夹杂尺寸越小，夹杂/基体界面的法向应力、剪切应力和夹杂内部主拉伸方向的应力越高。

People through nuclear reactions, have been synthesized 17 kinds of atomic number greater than 92 of the transuranic elements, and thousands of The new kinds of radioactive nuclides, and by high-energy and ultra-high energy-ray beam and the interaction of atomic nuclei and found hundreds of kinds of short-lived particles, namely, baryon, meson, lepton, and particle resonance states of these particles has led to a new field of study - the birth of particle physics since the age of .70, nuclear physics has entered a deep development and wide application of new, more mature stage, on the one hand the development of particle acceleration and detection techniques, expanding people's research in nuclear means, the other hand, nuclear technology to serve the national economy, for example, for the development and utilization of nuclear energy to provide more accurate nuclear data; the use of isotope tracer technique diagnosis and treatment of disease; the use of radiation and irradiation preservation of food, irradiation breeding .

人们通过核反应，已经人工合成了17种原子序数大于92的超铀元素和上千种新的放射性核素，并且通过高能和超高能射线束和原子核的相互作用，发现了上百种短寿命粒子、即重子、介子、轻子和共振态粒子，对这些粒子的研究导致了一门新学科——粒子物理学的诞生。70年代以来，核物理进入了纵深发展和广泛应用的新的更成熟的阶段，一方面发展粒子的加速技术和探测技术，扩充人们研究原子核的手段，另一方面将核技术服务于国民经济中，例如，为核能的开发利用提供更为准确的核数据；利用同位素示踪技术诊断和治疗疾病；利用射线及辐照技术保存食品、辐照育种等。

Researches reveal that students who suffer from corporal punishment tend to resort to violence in their future life.

研究表明遭受过肉体惩罚的孩子倾向于在他们今后的人生中使用暴力。

Total sugar of sarcocarp and chlorophyll of pericarp increased firstly, and then decreased afterward along with altitude; Titratable acidity, ascorbicacid and anthocyanin of pericarp were increased along with altitude; The content of protein increased firstly and decreased afterward along with altitude; Carotenoid of pericarp were decreased along with altitude.

果肉总糖和果皮叶绿素含量随海拔高度升高先升高后降低；可滴定酸、维生素C和果皮花青苷含量均随海拔升高而升高；蛋白质在1720m处最大，1420m处最小；果皮类胡萝卜素随海拔升高而降低。