Experimental Verification of Doppler Effect with the Refraction Method

The traditional methad of measuring Dopplr Effect is either reflection or dispersion.This article clarifies that it can also verify the Doppler Effect with the refraction method.We have designed the experimental system with the method of optical heterodyne,using the refraction light beam from a prism,and made the experiment.The experimental results are in accordance with the theoreticai calculation.It is very useful in some particular case,such as in Negative-Index Materials(NIM),to verify the Doppler Effect with this method.     

NIM/GPIB及其实现

本文介绍NIM/GPIB系统的基本概念、规定及其实现方法,并举例说明调节甄别器阈值的方案。     

基于TA新系统的铯原子喷泉钟与氢钟频差值预估算法的研究

本文提出了一种基于TA系统的铯原子喷泉钟与氢钟频差值的预估算法,该算法根据距预估日期最近几天的频差数据的即时特性外推预估未来的数据.该算法既能使TA(NIM)逼近铯原子喷泉钟输出频率,又能在铯原子喷泉钟停运时连续提供TA(NIM)的值,算法滞后时间仅为一天.用铯原子喷泉钟运行时的实测频差值检验该算法,表明TA(NIM)逼近铯原子喷泉钟,相对频率稳定度达8.63 ×10-15/天.     

分频电路在核电子学中的应用

在数字系统中各个模块所需的时钟频率往往各不相同,通常采用分频的方法由系统时钟得到所需频率.根据分频原理,基于SE120A芯片,提出了一种应用于核电子领域的2～64之间任意整数分频的实用电路,并对该电路进行了测试和分析,结果显示该分频电路基本无噪声,分频效果良好,稳定性好.     

QDC/NIM/GPIB电荷数字转换器

本文介绍了一种QDC/NIM/GPIB电荷数字转换器。在电流积分的威尔金逊ADC前端电路采用了MQT 200F电荷-时间转换的集成电路单片。给出了在线计算机的测试结果:输入满量程:256pC;积分非线性<0.2％;数字分辨:10位;长时间稳定性 <1道/8h。文中也介绍了GPIB接口电路的功能及特点。     

国产化聚酯分散型控制系统的设计

介绍了江苏仪征化纤股份有限公司涤纶一厂国产化聚酯生产中分散型控制系统的组成结构，软硬件的设计和实施。重点介绍了DCS的全局操作站、局域控制网、高性能过程控制器、网络接口模件的组成结构。     

带微处理器的多用测试器

本文介绍的多用测试器使用INTEL 8085A作为CPU。本机具有开关量输出口、可编程序I/O端口、CAMAC专用接口、DAC输出口、ADC输入口以及各种状态和数据的显示,并由上述各端口构成幅度测量通道和时间测量通道。本机因有单步和断点执行电路,可适用于调试和测量核电子学功能插件。     

一种基于单片机的多路定标器

本文介绍了一种基于８０３１单片机的多路定标器的主要性能和工作原理、该定标器简单、性能可靠、操作方便、可用于三路同步定时计数或定数计量测量。     

Functionality improvement of Nimesulide by eutectic formation with nicotinamide: Exploration using temperature-composition phase diagram

The aim of present work was to explore the temperature-composition phase diagram for detection of formation of a multi-component system. Fusion of model drug Nimesulide (NIM) and Nicotinamide (NIC) was prepared and evaluated for possible interaction using thermal analysis. Phase diagram and the appearance of single endotherm confirmed Eutectic formation with the molar ratio of 1:2 (NIM: NIC). Spray dried powder in same molar ratio showed improved functionality in terms of solubility (14 folds), dissolution (2 folds) in distilled water and drug content (92.27%). SEM study revealed that the particles of eutectic mixture were of nearly same size in all directions in shape with bigger particle size compared to the pure drug, which was responsible for its improved flow. The compressibility of prepared eutectic was greatly enhanced which was followed by formation of directly compressible tablets. FT-IR study explained the possibility of formation of hydrogen bond between both the components. Stability data proved the stable nature of the eutectic mixture as well as its prepared formulation. The study explained the way to prepare thermal phase diagram by taking solidus and liquidus points in DSC diagram, which was finally used as a confirmatory parameter for the formation of the eutectic. Simultaneous improvement in physicochemical and mechanical properties was highlighted.     

大亚湾RPC探测器基于NIM插件的小系统测试平台搭建及其应用

介绍了大亚湾( Daya Bay)反应堆中微子振荡实验RPC探测器基于NIM插件的小系统测试平台的搭建及其应用.该平台对大亚湾RPC探测器及其前端电子学板(FEC)进行了若干测试,并得到了一批有价值的数据,为后续的开发和完善工作提供了依据.