Introduction of a Reliable Method for Determination ofIntrinsic Viscosity for Any Polymer with High Precision简

Intrinsic viscosities for a given polyelectrolyte in salt free and low-salt solvents reported in literatures are normally not comparable, because of inadequate valuation procedures. This article describes a theoretically justified reliable method, which is free of any model assumptions： The so called Wolf plot （logarithm of the relative viscosity as a function of polymer concentration） enables the unequivocal determination of intrinsic viscosities for all kinds of macromolecules, irrespective of whether they are chain molecules of different architecture or globular polymers, whether they are charged or uncharged. The validation of the method was examined by evaluation of the viscosities of a polyelectrolyte, some uncharged polymers of different architectures, uncharged polymer blends, and some literature data.     

激光诱导海藻酸钠溶液转移的研究

以海藻酸钠溶液为研究对象,利用激光诱导前向转移技术诱导溶液转移,探讨激光脉冲能量、光斑直径、钛层厚度以及海藻酸钠溶液质量分数对液滴的直径和表面形貌的影响.实验结果表明,当光斑直径为100μm时,液滴的直径更小,且表面致密均匀且形貌清晰.极差分析显示海藻酸钠溶液质量分数、激光脉冲能量、光斑直径、钛层厚度对液滴直径影响的重要性递减.同时利用高速摄影仪拍摄激光诱导海藻酸钠溶液转移的过程,发现激光诱导液体靶材转移过程中伴随着流体多相动力学行为.     

初中化学恒沸现象探析——以加热通有二氧化碳的石蕊溶液未能恢复紫色为例

根据加热通有二氧化碳的石蕊溶液未能恢复至紫色，揭示氯化氢与水形成恒沸溶液的本质，得到不能通过对溶液加热煮沸的方法除去氯化氢杂质的结论。     

Effect of temperature on noninvasive blood glucose monitoring in vivo using optical coherence tomography

Noninvasive glucose monitoring（NIGM） techniques based on optical coherence tomography（OCT） are affected by several perturbing factors, including variation of tissue temperature. We first design a temperature control module integrated with an optical scanning probe to precisely control the temperature of skin tissues. We investigate the influence of temperature on NIGM with OCT by correlation analysis at different depths of in vivo human skin. On average, the relative changes in attenuation coefficient（ μt） per 1 °C of temperature lead to 0.30 ± 0.097 mmol/L prediction error of blood glucose concentration. For NIGM measurement methods using optical properties of the tissues, this effect can be taken into account.     

前言

<正>电化学(electrochemistry)作为化学学科中的一个重要分支,是研究两类导体——电子导体(如金属或半导体)以及离子导体(如电解质溶液)形成的接界面上所发生的带电及电子转移变化的科学,特别是研究电能和化学能之间的相互转换.自1799年伏打电池问世和1833年法拉第电解定律提出以来,电化学的发展已经超过200年的历史,并一直是化学科学中最活跃和最具有影响力的分支之一.近几十年来,电化学已经广泛渗透进入化学、物理学、材料科学、生物学、界面科学和电极过程动力学等多个学科领域,涵盖多种物理化学过程,成为物理学、化学和材料学紧密交叉和融合的学科.与此同时,我国电化学工作者的队伍也在不断壮大,科研水平迅速提升,创新能力不断增强.电化学领域的研究和创新对国民经济、军事、航空航天等领域具有特别重要     

锥形甲醇鼓泡浆液反应器的气含率和颗粒浓度分析

以空气－甲醇－石英砂体系为对象，研究了锥形鼓泡浆液反应器的气含率和颗粒浓度分析，考察了气速、颗粒浓度、液体性质对水力学性质的影响，并且得到平均气含率经验关联式和予测颗粒深度的Ｐｅ关联式。     

Efficient electronic entanglement concentration assisted by single mobile electrons

We present an efficient entanglement concentration protocol （ECP） for mobile electrons with charge detection. This protocol is quite different from other ECPs for one can obtain a maximally entangled pair from a pair of less-entangled state and a single mobile electron with a certain probability. With the help of charge detection, it can be repeated to reach a higher success probability. It also does not need to know the coefficient of the original less-entangled states. All these advantages may make this protocol useful in current distributed quantum information processing.     

一种基于递归自组织神经网络的氨氮浓度预测方法

针对当前污水处理过程出水氨氮浓度测量过程繁琐、仪器设备造价高、测量结果可靠性和精确性低等问题,本发明基于城市污水处理生化反应特性,利用一种递归自组织神经网络实现对关键水质参数氨氮浓度的预测,解决了出水氨氮浓度难以测量的问题;结果表明该递归自组织神经网络能够快速、准确地预测污水处理出水氨氮的浓度,有利于提升污水处理过程出水氨氮浓度质量监控水平和加强城市污水处理厂精细化管理。