纳米管阵列光催化降解TVOC的速率数学模型

基于菲克定律和质量守恒原理,建立了TVOC分子在纳米管内的质量传递方程,推导出了纳米管阵列(TNAs)的TVOC降解速率数学模型,模型表明:随着管长的增加,降解速率增加;存在最佳管径使降解速率达到最大.采用管径为60 nm、75 nm、90 nm,管长为1.1μm和2.3μm的TiO2纳米管,对初始浓度约为10 mg/m3的TVOC气体进行了光催化降解实验,估计了模型中的参数,同时计算出了相应实验条件下纳米管内TVOC降解速率的模型值.对比分析模型结果与实验结果,表明:TVOC初始浓度一定时,TVOC的降解速率与纳米管的总表面积正相关;TVOC降解速率的数学模型简单可靠.该模型为光催化反应中光催化纳米管尺寸的选择提供了理论依据.     

溴氰菊酯在河流底泥中降解动力学

以南京化学工业园内四柳河沿岸河流底泥为试材,研究了微生物对溴氰菊酯的降解及温度与污染物初始质量浓度对降解速率的影响．结果表明,河流底泥中的微生物有很强的降解溴氰菊酯的能力,尤其是表层河流底泥,微生物降解量与降解率在45d时达到了0．711mg·kg^-1、62．26％,其半衰期也最小,为21．66d;溴氰菊酯的降解速度与温度正相关,各层河流底泥中的污染物残留量在（30±1）℃时最少,在（10±1）℃时最多;溴氰菊酯的降解速度与污染物的初始质量浓度负相关,各层河流底泥均在污染物质量分数为0．5mg·kg^-1时降解速度快,半衰期时间短．     

近红外光谱无创血糖检测中体温变化的影响分析

利用光学方法无创伤地检测人体血糖浓度是目前的一个研究热点．分析了经皮漫反射光谱测量人体血糖的原理,针对信号微弱、生理背景噪声难以直接定量等现状,利用Monte Carlo模拟方法初步计算了血糖浓度和人体温度变化导致的漫反射光强,并通过葡萄糖水溶液实验对模拟计算的有效性进行了验证,最后根据两名糖尿病患者的口服葡萄糖耐量实验,估计了活体实验中的温度变化对血糖浓度模型误差的影响．结果表明,在37℃附近,体温降低0．1℃引起的漫反射光强与血糖浓度升高2．7mmol／L相当,而对基于近红外光谱的无创血糖预测,体温是一个非常重要的误差源,它对模型的影响占总误差的50％以上．     

负载型纳米TiO2光催化降解水中微量二氯乙烷

利用负载型纳米TiO2作为光催化剂对水中微量二氯乙烷进行紫外光催化降解处理。研究表明二氯乙烷光催化降解属表观一级反应动力学过程。不同的二氯乙烷初始浓度、光强和催化剂用量等因素对二氯乙烷的光催化降解具有不同的效果。初始浓度在4．821—22．838mg/L范围内，随着初始浓度的增大，二氯乙烷光催化降解的反应速率常数持续增大；光强的平方根与反应速率常数呈直线相关；随催化剂用量的增加，反应速率常数呈增大趋势。     

太阳模拟器作用下孔雀绿染料的催化降解研究

研究了在模拟太阳光和高压汞灯作用下,不同浓度的光催化剂和紫外光辐射强度对孔雀绿废液的光催化降解反应．结果表明,孔雀绿的降解与光源、光强、光催化剂浓度、光照时间等因素有关     

湿地污染物迁移扩散数值模拟

为研究湿地对污染物的迁移降解效果,以汾河一坝人工湿地为研究区域进行研究。基于现有自然湿地,采用湿地生态动力学模型,分析了氨氮、总磷在湿地中的迁移降解情况。通过模拟,发现污染物随水流向出口推移其浓度逐渐降低,氮磷污染物的变化规律基本一致。模拟时间3h污染物影响带到达出口,氨氮降解率为43.3%,总磷降解率为30.9%。该模型考虑了污染物的形态细致划分和转化途径,对认识污染物在湿地中的迁移规律有重要意义。     

固体废弃物生物降解时污染物运移过程一维数值分析

废弃物降解对污染物的运移机理具有十分重要的影响．基于固体废弃物生物降解效应,针对含水层位于地表下某一有限深度的情况,提出了分析固体废弃物填埋场污染物运移过程的一维计算模型．该模型中包含了污染物在饱和土中的对流、弥散和地球化学反应等运移机理．基于变动参数比较计算结果,通过分析表明：在大多数实际情况下,填埋场地下水中污染物浓度于某一时刻达到峰值,之后随时间增长降低．粘土垫层渗透速度及其吸附性是控制污染物运移过程的最重要因素,同时,粘土垫层厚度和含水层渗流速度的影响也不容忽略．     

焦化废水中难降解有机污染物降解特性

利用瓦氏呼吸仪测定微生物耗氧量的方法，研究了焦化废水及其中的难降解有机污染物吡啶、苯、间苯二酚和氯苯的降解特性。结果表明，pH值为7．2时，焦化废水降解率最高；当浓度小于40mg／L时，吡啶和苯可以部分被降解，浓度大于60mg／L时微生物呼吸作用明显地被抑制；污泥驯化有利于有机污染物降解速率的提高。     

大型舰船甲板变形测量

为测量大型舰船甲板的变形，提出了基于多个IMU数据融合的测量方法．建立了甲板变形测量模型．利用最小二乘估计对甲板的变形进行了分析．结果表明，用该方法可以实时估计未安装IMU战位点处的甲板变形，且能减少变形测量系统所需IMU的数量；变形估计精度与IMU的布置有关，当IMU的布置合理时，估计精度优于0．8arcmin．     

SBR工艺中污染物降解曝气过程的建模与控制

针对曝气降解过程精确控制时难于数学建模的问题,探讨了污水处理中污染物降解存在的技术难点,基于生物化学反应机理,建立了污水处理过程的DO参数控制的数学模型,对污染物降解过程的特性进行分析,采用仿人智能控制算法对降解过程特性进行模型匹配控制.仿真实验验证了所提出的数学模型与控制算法的稳定性、快速性与精确性.研究结果表明,所建立的DO参数控制数学模型与仿人智能控制算法的应用合理可行.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with