等径的

Silver nanoparticles with average particle size ranging from 2 to 131nm were manipulatively synthesized starting from silver nitrate using 10 kinds of different functional group-containing organic modifiers, such as polyvinylpyrrolidone, tween-80, sodium dodecyl sulfate, sodium polyacrylate, polyethylene glycol, D-sorbitol, sodium dodecyl sulfonate, sodium dodecylbenzene sulfonate, polyvinyl alcohol, cetyltrimethylammonium bromide, at room temperature.

摘 要：选择10种含有不同官能团的有机物为表面修饰剂，如聚乙烯吡咯烷酮、吐温-80、十二烷基硫酸钠、聚丙烯酸钠、聚乙二醇、山梨醇、十二烷基磺酸钠、聚乙烯醇、十二烷基苯磺酸钠和十六烷基三甲基溴化铵等，在室温下进行了平均粒径在2～131nm范围内纳米银颗粒的控制合成研究。

The changes during reheating of the supersaturated solution boron in the40MnB steel previously formed by rapid cooling from elevated temperature weredetected by phase analysis and observed by track microphotography(boron autora-diography)and metallography.

采用相分析、径迹显微照像、金相组织观察等技术，研究了40MnB钢高温加热后快冷形成的过饱和固溶硼在再加热时的变化。

Due to the film thickness and planeness, and so on will change the volume size, depending on the material you want to adjust the tension.

由于薄膜的厚度和裂缝度等会使卷径保留不小，因此给根据不不差别的质料公道调不静压辛。

But the noises, the attenuation and the multipath propagation inhering in the powerline make it very difficult to realize such kind of communication system.

但是电力线信道上存在的各种噪声、衰减和多径传播等问题，这些都大大提高了通信的难度。

Ingredients of vegetation in the tested plots, soil nutrition and soil profiles constitution were examined during pigeonpea podding stage each year in the tested agroforestry systems.

在中国云南省怒江流域设计升营造木豆与不同树种的混交生态林，每年木豆结荚期样地调查各树种的生长量（株高、地径、冠幅、一级分杖等）、木豆产量、植被变化情况、土壤剖面（造林2年后进行，并设对照剖面）。

Some superhighway bridges project, drill bore concrete riles are used for foundation. Due to the varilation of geology located is great, in parts of faults mixed withdissolving hole etc. the foundation of main bridge 8 m deep construction is difficult.

某快速路工程有若干座桥梁，采用钻孔灌注桩基础，共112根，桩径φ1.0m、φ1.5m及φ1.8m三种，桩长4.4～51m，由于地质条件变化大，部分地层中有断层夹泥与溶洞等不良地质，主桥桩基位于深约8m的水中，具有一定的施工难度。

In order to guarantee the stability and dependability of the rolling system further, separately experimental researched and analysised the arrange of the size of roller neck, heating temperature, spiting silk temperature and cooling speed, etc.

为进一步保证工艺制度的稳定性和可靠性，本文分别对辊径尺寸的配置、加热温度、吐丝温度和冷却速度等方面进行了实验性研究分析。

The company has the largest domestic first three links forming equipment, can produce various types of material elbow, three, four-way, the different-diameter pipe, big bend, flange , And other supporting tube.

公司拥有国内最大的三通一次成型设备，可生产各种材质型号的弯头，三通，四通，异径管，大弯，法兰等各种配套管件。

The practice of deep well diameter extension and washing, blasting is introduced in this paper.

介绍深水井中的扩径与洗井爆破工艺，并就如何保证爆效、加工和密封装药容器及容器在高水压下是否发生屈曲失稳的验算等进行了叙述。

During this research, detail test and analysis proved that vibration signal of ball mill can represent coal level of the ball mill and steel balls distribution. The test result could help to resolve a main problem of ball mill load measurement. The intelligent scheme for pulverizing system which was based on multi-sensors fusion technique as well as the intelligent control method was given in the thesis.

本文通过大量的分析研究和现场试验，通过对球磨机振动信号进行频谱分析，监测磨筒存煤量和钢球球径分布情况，初步解决了球磨机测控中一个关键问题；在此基础上，采用软测量、多传感器信息融合技术，引入神经网络模型等方法，并考虑与电厂DCS和计算机信息系统的连接，对智能化球磨机制粉系统进行了总体设计，在技术上有所创新。

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。