Rhino的建模及实例

Rhino是一个功能超强的三维建模软件,本文介绍了利用Rhino建立三维模型的基本方法,并具体给出制作花模型的方法和过程。     

新型数字印刷机

自1993年第一台数字印刷机进入印刷市场以来,对此新技术的讨论就一直没有停止过.虽然迄今为止全世界范围内只安装了不到4000台数字印刷机,但数字印刷技术与数字印刷方式却已被众多业内人士及厂商所认可,并不断得到创新与发展.     

BN对Sialon复相陶瓷性能的影响

本文分析讨论了不同 BN 含量对热压 BN-Sialon 复相陶瓷材料力学性能及热学性能的影响。结果表明,BN 粉末的加入极大地提高了 Sialon 陶瓷的抗热震性,并使材料的高温强度有所提高。     

莫来石——钛酸铝复相陶瓷的强度与热膨胀性

本文介绍了莫来石－－钛酸铝复相陶瓷的室温强度和热膨胀－－冷却曲线等性能。重点分析了强度提高及冷却滞后现象的原因。     

钛／钢复合材料热等静压扩散焊的研究

钛／钢复合材料热等静压扩散焊的研究张英才，陈虹（冶金工业部钢铁研究总院１０００８１）钛是当代新崛起的第三金属，它的比重小、耐蚀性能好等优良特性已为人们所共知。但当前影响钛材推广应用的最突出问题是价格较高，钛复合材料的出现为钛材的推广应用提供了可喜的前...     

基于网络的新型远程实验系统模型的研究与开发

提出了一种基于网络的新型远程试验体系结构,以PC控制技术、Socket通信技术和SVG显示技术为主要实现手段,对网络实验数据的实时传输和显示进行了深入探讨,并在实验室试验装置上试验成功,提供了一种解决教学资源的供需矛盾的良好途径,具有重要的现实意义和应用价值。     

一种应用于能量攫取系统的低功耗的工作于亚阈值区域的基准电压源的设计

We propose a bandgap reference, which works in sub-threshold regions to the reduce power consumption in applications such as those in energy harvesting systems that stimulate the development of power management for low power consumption applications.Measurements shows that the supply current of the proposed bandgap reference is only 6.87 μA, including a voltage buffer consuming 3.6 μA of supply current, when the supply voltage is 5 V.The supply voltage can vary from 3 to 11 V and the line regulation of the proposed bandgap reference output voltage is 0.875 mV/V at room temperature.The temperature coefficiency is 88.9 ppm from 10 to 100° C when the supply voltage is 5 V.     

一个用于能量攫取系统的间歇式可调降压开关电容直流转换器

Energy harvesting systems stimulate the development of power management for low power consumption applications. Improving the converter efficiency of power management circuits has become a significant issue in energy harvesting system design. This paper presents a variable step-down conversion ratio switched capacitor （SC） DC-DC converter to advance the converter efficiency of charge on the stored capacitor in a wireless monitoring system of orthopedic implants. The converter is designed to work at 1 MHz switching frequency and achieves 15 to 2 V conversion. Measurement results show that the converter efficiency can reach 42% including all circuit power consumption, which is much higher than previous work.