查询词典 particle

This article introduces some practical problems met in producing high-purity cathode copper , analyzes the reason of cathode copper surface particle formation by particle classification, and puts forward treatment measures and preventive measures to be taken.

介绍了高纯阴极铜生产中易遇到的实际问题，并把电铜表面粒子分成几种类型分析了其粒子形成的原因，提出了处理及应采取的预防措施。

In a same cloud band, the variation of temperature is small meanwhile the temperature is lower.The convective bubbles were observed in the warm clouds under the middle of the cumulostratus on 21,June 1992. The bubbles clearly show that they are one kind of mesoscale organization. It suggests that the synoptic system is situable to produce convective bubbles. Its contrastly analysed that the particle concentration and the liquid water content are higher.the particle spectra is similar,the particles captured by 2D-C probe are bigger in the bubbles.

1991年6月21日个例观测到对流泡位于层积云下部暖云中的部分，泡状结构明显，呈现出中尺度组织特征，天气系统的配置有利于垂直上升运动的发展：通过对比分析，发现对流泡内具有云滴浓度高、液态水含量较高、云谱型相似以及2D-C粒子尺度大等特点：本次个例观测到的对流泡内云滴谱表现为单峰型。

Results show that the morphology of HNS changes from short plane-like shape to long plane-like shape when non-solvent temperature changes from 25℃ to 50℃. The morphology comes through the variety of ellipsoid, short plane-like and club-shaped with pH value of non-solvent from acidity to neutral and finally basical, with the particle size distribution in 50-300 nm, 50-500 nm, and 50-600 nm, respectively. Ellipse plane-like and long club-shaped morphology HNS were obtained using white dextrine and sodium carboxymethyl cellulose as surfactants in non-solvent, with the particle size distribution in 50-300 nm and 50-600 nm.

结果表明：非溶剂温度由25℃升高到55℃后，HNS晶体形貌由短片状变为细长片状；pH值由酸性变化到中性再到碱性时，亚微米HNS的晶体形貌经历椭球状、短片状、棒状的系列变化，粒度分布分别处于50~300 nm、50~500 nm、50~600 nm；白糊精和羧甲基纤维素钠作为晶形控制剂修饰后的亚微米HNS晶体形貌分别椭圆片状和长棒状，粒度分布分别处于50~300 nm、50~600 nm。

The gas solid interaction was studied, the solid concentration and particle size distribution contours downstream of the nozzle were obtained. The particle roping mechanism in a coal conveying pipe with large diameter was also studied with the fiber probe. The on-line coal concentration measuring facility is needed for NO〓 reduction. In this work, a set of on-line coal concentration measuring facility was developed and installed in the coal conveying pipes of a 660MW capacity utility boiler, which can give on-line accurate coal concentration information for the operator.

论文首次采用基于光学波动法的激光光纤探针，对高浓度的低NO〓燃烧器出口的气固两相流动的详细结构进行了试验，研究了配300 MW煤粉燃烧锅炉的燃烧器出口高浓度气固相射流中颗粒浓度、粒度随射流发展的演变规律，分析了利用水平浓淡燃烧器和齿形燃烧器实现对低NO〓燃烧有利的气固结构，并验证了基于DES方法的气固两相数值模拟的计算结果。

From the following parameters of candlelight particles: their initial position and number, initial color, life cycle and age, and initial speed and acceleration, research particle system and improve existing particle system.

从烛火粒子的初始位置和数量、烛火粒子的初始颜色、烛火粒子的生命周期和年龄、烛火粒子的初始速度和加速度着手，研究粒子系统方法，改进已有的粒子系统。

The copper slag of smelter was treated, that is, changed its particle shape and particle size distributi- on, to replace river sand compounding liquid concrete.

将冶炼厂的废弃铜渣经过加工处理，改变粒径形态和颗粒级配，以替代河砂配制流态混凝土，不但可以缓解混凝土细骨料资源日趋紧缺的矛盾，降低支护成本，而且可以消除铜渣堆积造成的环境危害。

Particle size, particle morphology and crystal morphology of calcium carbonate affect the performance of matrix materials strongly.

碳酸钙粉体之粒径、晶貌及晶型为影响基材性能之重要因素。

The results show that the mill current and particle filling increased with the coal feed flow when ventilation rate remained the same, mill current started to decline after rising to a peak, the beginning of the decline region corresponded to the optimal particle filling, at this point, the gap between balls were just full of coal particles, the mill was running close to maximum power, and grinding efficiency reached the highest.

研究结果表明，磨煤机通风量不变时，随着给煤量增加，磨内存煤量增加，磨煤机电流升高，电流上升到峰值后又有所下降，开始下降的区域对应的料位是最佳运行料位，此时，钢球间隙中刚好充满了煤粉颗粒，磨煤机接近最大功率运行，粉碎效率达到最高。

the effect of inertia weight on particle swarm optimization is studied,on basis of which adopts four kinds of strategies of inertia weight to regulate the speed of a new quantum delta potential well based particle swarm optimization.a faster and more stabile algorithm,found by comparing the performances of four equations regulated the inertia weight,solves 0/1 knapsack problem.the result of experiment shows that the modified algorithm improves the precision of optimal solution and has a faster speed and a higher efficiency in convergence.in a word,choosing a parameter of inertia weight suitably can improve the performance of new qdpso.

摘 要：在研究惯性权重对基本pso算法影响的基础上，根据惯性权重对粒子群算法影响的特点，采用4种惯性权重策略对一种新的具有量子行为的粒子群算法的速度进行调节，比较每种算法的性能，从中找到一种新的性能更好的改进算法，将其用于求解0-1背包问题。实验结果表明较好地选择惯性权重参数对算法的性能有很大提高，该改进算法在求解0-1背包问题中具有高效性，提高了最优解的精度，同时具有较快的收敛速度。

A new parameter is introduced here to measure the locality of particle distribution. The relationship between local coefficient and particle density is simulated with random updating rule and critical density is measured, which is in conformity with the critical density of the system.

我们引入了一个新的参量局域化系数来度量系统粒子分布的局域性，数值模拟了在随机动力学规则下的局域化系数随粒子密度的变化关系，得到临界密度，结果与解析得到的系统临界密度相符。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。