非金属

Nanomaterials have many new characterizes which different from the normal materials for their small size, big surface area ratio and quanta dimension domino effect, for examples, the metal with good conductor will be turned into nonmetal when the size is reduced tonanometer levels; the resistance of originally nonconductor will be descended greatly when its size is reduced several nanometers or so, and loss the nonconductor property; the general solid is steady under certain conditions, while under nanometer conditions, the capabilities will be effected greatly by the granule sizes, the newness characteristics made nanomaterials have great appliance foreground on catalyze, optics, and industry produce and so on, therefore the nanomaterials have been the hotspot for materials science, chemistry science and so on.

纳米材料由于尺寸小、比表面积大和量子尺寸效应使它具有不同于常规固体材料的新的特征，如原来是良导体的金属，当尺寸减小到纳米量级时就变成非金属型；原来是绝缘体的物质，当尺寸减小到几纳米或几十纳米时电阻大大下降，失去了绝缘体特性；常规固体在一定条件下物理性能是稳定的，在纳米状态下，颗粒尺寸对性能产生强烈的影响等等，这些新奇的特点使得纳米材料在催化、光学、工业生产等各个方面都有着广阔的应用前景，因此，纳米材料目前已经成为材料科学、物理学及化学等学科的前沿热点。1990年7月在美国巴尔基摩召开了国际第一届纳米科学技术会议，正式把纳米材料科学作为材料科学的一个新的分支公布于世。

The paper summarizes how to select nonferrous materials to satisfy the requirement of engine according to different working condition.

对根据不同工作条件选择适合的非金属材料以满足和平衡各方面的性能需求进行了综述。

Because the marble is the nonmetallic material, nonmagnetic responded certainly that also does not have the plastic deformation.

由于大理石系非金属材料，绝无磁性反应，亦无塑性变形。

Bachelor degree or above, major in material, nonmaterial, composite material

本科及以上学历，材料学、非金属材料学、复合材料等相关专业。

Foam ceramic was a new nonmental porous material , it has 70%~90% porosity and three dimension solid net framework structure.

泡沫陶瓷是一种孔隙率高达70%~90%，具有三维立体网络骨架结构和贯通气孔的新型非金属多孔材料。

The mill machine is mainly used to grind various nonmental materials whose Moh's hardness in under 9 into powder of 0.045mm to 0.005mm.

热轧机主要用于研磨各种非金属材料的，卫生部的硬度下，在9成粉0.045mm至0.005mm的。

This product is made of new materials with extra care. the door leaf: Nonmental structure; The door frame; A3 stainless steel. It has many aduvantages, Such as fire-prevention, Heat insulation, Water-proof, Corrosion resistant and wide decoration.

本产品采用新型材料精制而成，门框采用A3冷轧钢板或不锈钢材料，门扇为非金属材料结构，具有防火、隔热、防水、耐腐蚀，装饰性强等特点。

The design of a nonmental ultrasonic detector was introduced. The detector was based on EP2C20 series FPGA chip,through adding NiosII soft processor and other interfaces to FPGA ,equipped with high precision data collection system and TFT LCD module and so on.The system was constituted.It including ultrasonic eradiating,receive sychronously,audio parameter detecting automatically,data analyse and process,display result timely,data storage and data output circuits.For the developing of imaging,intelligent and automation of ultrasonictesting ,a very good foundation is established by the system.

介绍了非金属超声检测仪的软硬件设计方法该仪器以EP2C20系列FPGA芯片为核心，通过在FPGA中加载NiosII软核处理器和其他外围接口电路，配合高精度数据采集系统TFT液晶显示模块等设计而成该仪器集超声波发射同步接收声参量自动检测数据分析处理结果实时显示数据存储与输出等功能于一身，为数据的进一步分析处理和实现超声检测的图像化智能化自动化奠定了良好的基础

It is easy to tell the difference between metal and nonmetal.

说明金属与非金属的区别是不难的。

Often used in the form of combination of metal and nonmetal.

常采用金属与非金属组合的形式。

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。