“啤酒发酵过程微机控制装置”通过技术鉴定

受省科委委托,山东省科学院于1988年12月23日在济南组织通过了“啤酒发酵过程微机控制装置”的技术鉴定。该装置主要用于啤酒生产发酵过程的罐温控制,是一种功能齐全,操作方便、较为理想的在线微机监控装置。该装置针对啤酒发酵过程罐温控制对象具有大惯性、大滞后,以及控制过程工艺要求复杂的特点,在软件设计上采用了独到的死区 PID 与仿人智能控制相结合的控制算法,较     

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     

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。     

啤酒生产中麦汁发酵过程的实验室模拟

利用ＤＤＣ－Ⅱ型补偿式数字精密量热系统和专门设计的ＣＣＵ－Ｉ型量热单元，对啤酒生产中在控温下麦汁发酵过程进行了实验模拟，获得了过程的热谱图，并对葡萄糖液进行了相同的发酵过程的热监控。对比和分析了二者的热谱图，从量热的角度验证了文献中关于酵母对糖发酵的作用历程的认识。另外，对影响发酵的主要因素进行了试验研究，并在选定的通气速率条件下进行了相同的发酵试验，为改进啤酒生产工艺，提高啤酒质量和产量提供了实     

啤酒生产中麦汁发酵过程的实验室模拟Ⅱ麦汁(主)发酵过程的热跟踪监测

利用ＤＤＣ－Ⅱ型补偿式数字精密量热系统和专门设计的ＣＣＵ－Ⅰ型量热单元，对啤酒生产中在控温下麦汁发酵过程进行了实验模拟，获得了过程的热谱图，并对葡萄糖液进行了相同的发酵过程的热监控。对比和分析了二者的热谱图，从量热的角度验证了文献中关于酵母对糖发酵的作用历程的认识。另外，对影响发酵的主要因素进行了试验研究，并在选定的通气速率条件下进行了相同的发酵试验，为改进啤酒生产工艺，提高啤酒质量和产量提供了实验依据     

枸杞干制温度的微机实时监控系统

对枸杞干制过程微机实时监控系统进行了研究和设计，实际运行结果表明，系统稳定可靠，控制效果良好，满足生产工艺要求。     

啤酒发酵过程的多变量开关控制仿真研究

针对啤酒发酵过程温度控制的特点．在因素空间理论基础上提出一种全新的开关(Bang-Bang)控制算法，并结合Smith预估搜寻算法．对啤酒发酵降温模型进行了仿真试验，控制精度高于常规PID控制．计算量小，鲁棒性好，自适应性强，具有广泛的工业应用前景．     

点焊热膨胀位移质量监控的研究

分析了电极间热膨胀位移监控点焊质量的原理和监控系统的基本构成。利用光栅位移传感器，建立了热膨胀位移点焊质量微机监控系统，实验结果表明，该监控系统具有自适应特性，能够有效地实现点焊过程质量监控。     

啤酒发酵过程模糊智能PID控制

啤酒发酵过程是啤酒生产的重要环节之一,而在此过程中,温度变化是主要因素.因此,发酵温度的控制直接影响啤酒质量.啤酒发酵过程具有大惯性、大时滞、非线性等特点,用传统PID控制难以实现及时、准确地跟踪工艺曲线的要求.针对啤酒发酵温度控制过程中的难点引入了一种模糊智能PID控制算法,将模糊控制理论与PID控制相结合,在模糊逻辑整定控制算法(FSW)基础上增加了模糊逻辑调节微分控制及智能积分控制,有效地改善了原有PID控制方法的缺陷.     

啤酒发酵过程温度液位控制系统

首先对啤酒发酵过程听特点进行了研究,建立了啤酒发酵过程听近似数学模,发现啤酒发酵过程具有时变性,无自衡性和纯滞后的特点。根据此特点,本文提出了一种行之有效的控制方案。实践证明,本文提出了的控制方法具有较好的控制效果,完全满足了控制系统提出了控制要求。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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