排序方式: 共有11条查询结果,搜索用时 15 毫秒
1.
2.
3.
利用蒽甲醇对单壁碳纳米管进行了化学修饰,并利用透射电镜、紫外可见吸收光谱、荧光光谱、拉曼光谱对修饰后的单壁碳纳米管进行了表征分析.通过对比吸附前后的紫外可见吸收光谱发现,吸附后的光谱强度下降大约57.1%,说明单壁碳纳米管吸附上了蒽甲醇.通过拉曼光谱分析发现,吸附后单壁碳纳米管的拉曼光谱中主要峰的位置向长波方向移动了6~7cm^-1,认为拉曼光谱发生移动的原因是单壁碳纳米管吸附蒽甲醇前后状态的改变导致的. 相似文献
4.
5.
6.
提出了一种简化的相干检测系统,通过在时域上交替探测信号的同向(Ⅰ)及正交(Q)信息分量,实现了基于单个平衡光电探测器(BPD)的相位分集接收.仿真结果表明,25 Gbit/s的非归零信号经过25 km标准单模光纤传输时,在10-3误码率门限下,其接收灵敏度为 39.97 dBm.用Gram-Schmidt正交化过程算法对信号光与本振(LO)光之间频率偏移引起的I、Q分量失配角进行补偿,当频率偏移小于符号速率的1/5(±5 GHz)时,灵敏度代价约为3.2 dB.此外,当LO光功率较高时,用单PD取代BPD的灵敏度损失约为3 dB.本方案为实现低成本的相干检测提供了一种解决方法. 相似文献
7.
IntroductionDiverse user requests and intense marketcompetition resultin difficultchallenges formodernmanufacturing enterprises.To face thechallenges,a variety of new manufacturing modeshave been proposed,such as Computer IntegratedManufacturing,Concurrent Engineering,LeanProduction,Just in Time,Virtual Manufacturing,and Agile Manufacturing.Agile manufacturing responds to uncertainmarket conditions by building flexible productioncapabilities with the Agile ManufacturingEnterprises ( AM… 相似文献
8.
详细地介绍了一种提纯单壁碳纳米管的方法,并利用拉曼光谱对纯化前后的单壁碳纳米管进行了分析,结果表明用这种方法能得到纯度较高的单壁碳纳米管. 相似文献
9.
Dynamic alliances are one type of production modes to realize agile manufacturing. Technology support for the dynamic alliance selection process is an important task in agile manufacturing. This paper analyzes the general dynamic alliance principle, suggests a network method for selecting partners, and analyzes the evaluation factors for partners selection in the process of setting up a manufacturing alliance. The results show that these factors can be divided into two levels; macro- and micro-characteristics. The decision-making process by each member has five main technical activities, which form the technology support system for the manufacturing alliance bid. 相似文献
10.
利用蒽甲醇对单壁碳纳米管进行了化学修饰,并利用透射电镜、紫外可见吸收光谱、荧光光谱、拉曼光谱对修饰后的单壁碳纳米管进行了表征分析.通过对比吸附前后的紫外可见吸收光谱,发现吸附后的光谱强度约下降了57.1%左右,说明单壁碳纳米管吸附上了蒽甲醇.通过拉曼光谱分析,发现吸附后单壁碳纳米管的拉曼光谱中主要峰的位置向长波方向移动了6~7cm^-1,分析认为拉曼光谱发生移动的原因是单壁碳纳米管吸附蒽甲醇前后状态的改变导致的。 相似文献