CMF300M355NU型质量流量计在油库汽车装车中的应用

介绍了质量流量计的工作原理有应用效果。这种新型质量流量计精度高，稳定性好，示值计量简便，可直接显示质量、流量、介质温度、密度等，维护量低，但必须正确安装、使用，才能发挥其应有的作用。     

Novel Nakagami-m parameter estimator for noisy channel samples

A novel moment-based m parameter estimator using noisy channel samples is derived. This estimator is simpler than known estimators. Numerical results are presented to demonstrate that, under some practical fading conditions, it outperforms previous estimators.     

大比例尺地质剖面图第一条标高基线绘制方法的探讨

介绍了大比例尺地质剖面图第一条标高基线的几种绘制方法，总结了绘制经验。     

A new approach of formation navigation derived from multi-robots cooperative online FastSLAM

A new formation navigation approach derived from multi-robots cooperative online FastSLAM is proposed. In this approach,the leader and follower robots are defined.The posteriori estimation of the leader robot state is treated as a relative reference for all follower robots to correct their state priori estimations.The control volume of individual follower will be achieved from the results of the corrected estimation.All robots are observed as landmarks with known associations by the others and are considered in their landmarks updating.By the method,the errors of the robot posterior estimations are reduced and the formation is well kept.The simulation and physical experiment results show that the multi-robots relative localization accuracy is improved and the formation navigation control is more stable and efficient than normal leader-following strategy.The algorithm is easy in implementation.     

海量数据库迁移与升级

目前数据库中数据越来越多,应用对数据库在线时间的要求也越来越高,使得数据库迁移和数据库升级成为了一件非常困难的事情.为此,介绍了几种迁移和升级的方法,用以实现以尽可能少的停机时间对TB级数据库完成数据库的迁移和升级.     

基于模型平均方法的糖尿病病人生存时间预测研究

针对糖尿病病人生存时间的不确定性及影响因素的复杂性,将模型平均理论引入病人生存时间分析与预测研究,基于糖尿病病人的数据,利用OPT、S-AIC、S-BIC、AIC和BIC 5种方法预测病人的生存时间.研究表明,模型平均方法要比模型选择方法的预测效果更好.     

含碳氨水集成分离新技术的应用

通过应用含碳氨水集成分离技术改造氨回收装置，提高了分离效率及处理通量，经济与环保效益显著，氨回收率达９９％，处理量提高６０％，塔阻力下降８０％，蒸汽耗量下降４２％，装置出口废液含氨量达国家一级排放标准。     

负离子分解室内有机化合物的测试

低浓度、高毒性的挥发性有机化合物(VOC)污染大气,造成“病态建筑综合症(SBS)”,严重威胁着人们的身体健康。空气中的负离子除有利于人体生理健康以外,还能有效分解空气中的VOC。将一种负离子添加剂添加到墙体涂料中,可以得到一种能有效释放负离子的涂料。本文测试了涂刷负离子添加剂涂料的测试小室中负离子分解总挥发性有机化合物(TVOC)及甲醛的性能,结果证明:涂料释放的负离子能有效分解VOC,使室内VOC的浓度在较短时间内满足GB/T—18883—2002的要求。     

三氯化磷洗涤塔的改造

1 前言 纯净的三氯化磷为无色透明液体,有杂质存在时呈乳白色或黄色浑浊状态,具有刺鼻、窒息气味,有剧毒和强腐蚀性。熔点-112℃,沸点76～78℃,密度(D20)为1.57-1.58。遇水生成HCl和H3PO3,并放出大量的热,严重时有爆炸和着火的危险。 三氯化磷是一种重要的化工原料,被广泛用于有机合成工业,如染料、香料、农药等。     

A ratiometric fluorescent sensor for zinc(II) with high selectivity

Spectroscopic studies revealed that the compound [N,N′-di(quinoline-2-methylene) -1,2-phenylenediimine] (1) exhibited a rather high selectivity toward Zn²⁺ over other metal ions, even Cd²⁺. In acetonitrile, the red shift of fluorescent emission from 396 nm to 426 nm upon zinc binding is due to the formation of a 1:1 metal/ligand complex.