基于iFIX及PAC的啤酒生产监控系统设计

根据啤酒生产工艺和控制要求,设计了基于PAC和iFIX的啤酒生产监控系统。该系统包括糊化锅监控、糖化锅监控、煮沸锅监控、发酵过程监控、过滤及清酒罐温度监控。设计了模糊PID复合温控程序,温度实时监控曲线的显示可以达到较高的精度。     

大豆秸秆酶水解及L-乳酸发酵的研究

用纤维素酶对氨预处理后的大豆秸秆进行酶水解,继而研究了用干酪乳杆菌及清酒乳杆菌进行L-乳酸发酵．结果表明,实验务件下,5％的大豆秸秆经酶水解后,还原糖质量分数为242．25mg/g,纤维素糖化率为51．22％．清酒乳杆菌、干酪乳杆菌及该2种混合菌种发酵酶解液所得L-乳酸的转化率分别为48．27％、56．42％和71．05％．     

基于生物传感器的发酵过程在线分析系统研制

基于发酵过程自动优化控制的需求,研制了发酵过程生物传感器在线自动取样分析系统。给出了在线分析系统的分析原理及其结构组成,详细介绍了自动取样、样品稀释及生物传感器信号处理的方法。系统可以实现对葡萄糖、乳酸和谷氨酸等重要生化参数的自动取样分析,并把分析结果通过485接口或4~20 mA模拟接口发送到发酵控制器,为发酵控制提供生化分析数据。用葡萄糖标准样品作为发酵液对实验样机进行了测试,结果表明在线分析系统具有较高的分析精度,可以满足发酵过程分析的需求。     

微机控制技术在啤酒发酵系统中的应用

通过对啤酒发酵系统的分析, 介绍了在啤酒发酵过程中, 如何利用计算机技术, 实时处理现场采集的温度、压力、液位等数据信号。通过本微机系统的应用, 达到了对啤酒发酵过程实现自动控制和管理自动化的目的     

乳酸菌发酵过程参数的研究

为准确、快捷地掌握乳酸菌发酵过程中主要参数的变化情况,通过KRH-BI0300型发酵罐控制系统、细胞密度监测系统、SHP8400PM过程气体质谱分析仪、生物传感分析仪等多种发酵过程分析检测手段,对乳酸发酵过程中乳酸菌活细胞数、尾气成分、葡萄糖及乳酸含量的变化情况进行测定。结果表明,应用多种现代化分析检测手段可以快速、精确地掌握乳酸菌发酵过程参数变化情况。该研究为乳酸菌发酵过程的优化控制及规模工业化奠定了基础。     

沼气厌氧消化过程影响因素研究进展

沼气厌氧消化过程涉及复杂微生物群落在厌氧环境下的协同作用,此过程中的因素变化会导致菌群结构发生改变,进而影响发酵系统的稳定性和效率。本文对影响厌氧发酵过程稳定和效率的因素进行了探讨,包括发酵温度、pH值、碳氮比、有机负荷、停留时间及营养元素等。认为厌氧发酵过程采用混合原料可以弥补单一原料发酵过程的养分不足和特定成分积累对发酵过程稳定性的影响;在发酵温度的选择上,要充分考虑能源输入/输出比,才能保证过程的经济性。     

金霉素发酵生产过程微机自动控制系统

应用ＴＣＳ集散系统,建立pＨ自动控制、自动补料、自动消泡等系统的控制体系,对金霉素发酵生产过程进行自动控制．结果表明：发酵单位平均提高８．８％,发酵总亿平均提高９．６％,获得显著经济效益．     

发酵过程生物量软测量虚拟仪器系统的集成

本文根据发酵过程生物量检测特点,基于虚拟仪器技术提出了一种全新的生物量在线检测系统集成方法,该系统采用PXI（PCI Extensions for Instrumentation）总线硬件平台,结合软测量算法,有效地实现了生物量在线估计。给出了该系统的集成原理和实现方法,及系统的硬件和软件设计。实验研究表明,集成的发酵过程生物量软测量虚拟仪器系统,能够充分利用软测量技术和虚拟仪器技术的各自优势,系统硬件配置灵活,实用性强,并能得到较高的发酵过程生物量在线测量精度。     

红曲霉界面生长动力学模型的建立

采用界面培养系统,模拟红曲霉固态发酵过程。将红曲霉发酵过程分为快速期,减速期和衰退期,进而建立了界面上红曲霉生长的动力学模型。模型较好地吻合了界面上红曲霉生长的动力学曲线,反映了红曲霉固态发酵过程中微环境下的生长过程。     

固定化混种发酵生产海藻豆乳饮料的研究

以海藻汁液和大豆浆混合液为原料，接种固定化保加利亚乳杆菌于４３℃发酵８ｈ发酵液经过滤后，再接入固定化清酒酵母或产香酵母Ａ－２于２５℃或３０℃下发酵１２ｈ，制成海藻豆乳饮料，经测定该饮料总酸含量为８．２～８．５ｇ／Ｌ，总酯含量为１．６～１．８ｇ／Ｌ，乙醇含量为０．８３％～０．８６％，碘含量为１５～２６μｇ／ｇ。     

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