抗生素发酵微型机集散式测控系统

文章主要介绍了一种抗生素发酵集散式测控系统。该系统采用高档微型机以及ＳＴＤ总线工业控制机组成分级分布式结构，实现了土霉素发酵过程的各种工艺参数检测以及对发酵液温度、ｐＨ值和补料量的控制。     

全毛针织绒线绞纱防毡缩及其染色工艺

论述了全毛针织绒线绞纱氯化一树脂防缩法．用二氯异氰脲酸盐作为释氯剂，阳离子自交联非硅聚合物为树脂，通过释氯剂的不同用量及处理浴的ｐＨ值和温度变化，研究全毛针织绒线的处理效果．得出采用３％释氯剂滴加（处理浴ｐＨ值为４．５、温度为３０℃）和３％树脂进行绞纱防缩处理，防缩效果达到了国际羊毛局机可洗的标准．选用适当的染料（兰纳素和兰纳洒脱染料），试验释氯剂对色变的影响；对不同的颜色，根据释氯剂对其影响程度的大小，采用不同的处理顺序（先氯化处理后染色或先染色后氯化处理）．对先氯化处理的全毛针织绒线染色性能的研究结果表明，适当地提高染浴的ｐＨ值，降低染浴的始染温度，必要附加入适当的释酸剂控制染浴的ｐＨ值，有利于染色的均匀．防缩后的全毛针织绒线的色牢度符合国际羊毛局机可洗的色牢度要求．     

磷酸亚铁铵微肥的研制

本文对高浓度微量元素复肥磷酸亚铁铵（ＦｅＮＨ４ＰＯ４，Ｈ２Ｏ）的生产方法及工艺条件进行了研究．以萃取磷酸，工业废硫酸亚铁及氨水为原料．通过正交试验推荐最优工艺条件是：磷酸和硫酸亚铁的摩尔比为１．５：反应温度为８０℃；反应时间为１小时：反应最终控制的ｐＨ值为６．在此条件下，铁的转化率可大于９５％；磷酸亚铁铵的生成率大于９０％．     

啤酒发酵微机测控系统

首先分析温度、压力对发酵过程的影响，然后根据发酵工艺曲线及发展规划提出控制方案，并加以实施．整个测控系统实测指标：测量精度为温度±０．１℃，压力±０．５％，液位±０．５％；控制精度为温度±０．３℃，压力±０．６％．     

犁头霉菌培养制备壳聚糖

利用液体培养其摇瓶培养犁头霉属真菌，对培养条件进行了优化，发现培养温度、时间以及ｐＨ值等因素对壳聚糖产量产生明显影响。结果表明：ｐＨ值影响壳聚糖的脱乙 酰程度，ｐＨ值控制在４．５可获得９０％以上的脱乙酰度；控制２８～２９℃的培养温度和ｐＨ值５．０，可使壳聚糖的收率达到７８０ｍｇ／Ｌ，发酵法生产的壳聚糖成膜后，与酸碱处理甲壳索得到的产品的微观结构上存在显著差别。     

大港油田自来屯掺水管线成垢机理的静态研究

针对大港油田枣园地区自来屯掺水系统水质矿化度高、结垢严重的特点，在对大港油田枣园地区自来屯掺水系统水质及垢样组成的分析基础上，从温度升高，ｐＨ值、各种成垢离子含量、矿化度、管壁粗糙度等因素对成垢量的影响及结垢过程中溶液ｐＨ值的变化进行了详细研究，温度升高，ｐＨ值增大及重碳酸根离子含量增大结垢量明显增加．特别是ｐＨ值增大，成垢量增加更为显著．该实验结果为大港油田枣园地区自来屯掺水管线成垢量的预测、阻垢和清垢提供了依据     

基于ATmega16的pH参数在线测控仪设计

为了在线连续准确测量水体溶液中的氢离子浓度(pH值),为各种生产过程提供准确、可靠的工艺参数,设计了新型pH参数在线测控仪.分析了化学分析法、试纸分析法和电位分析法测量pH值的原理和各种测量方法的优缺点,以及电位分析法测量pH值时环境参数对测量结果的影响和软硬件补偿方法.以电位分析法为基础,应用新材料技术的成果,自制了新型一体化酸度传感器.并以新型高速单片机———ATmega16为核心,设计了具有数据采集与处理、现场控制与远程通信等功能的测控仪表.经实际使用表明,用电位分析法测量各种水体溶液的pH值,可以做到在线实时测量,测量结果准确可靠.以ATmega16为核心的测控仪表,性能先进、抗干扰能力强,可以满足各种工业现场应用的要求.该pH参数在线测控仪已应用到多个工业企业的日常生产过程中,应用前景广泛.     

D_＋－葡萄糖在Pb－Zn合金电极上电化学还原的研究

本文报道以Ｐｂ－Ｚｎ合金为阴极材料，在隔膜槽中电化学还原Ｄ＋－葡萄糖制备山梨糖醇的主要工艺条件．测定了阴极材料、电流密度、溶液ｐＨ值、浴温度及添加剂等对电解还原电流效率的影响，为选择合适的工业电解条件提供基础数据．     

影响大豆蛋白质提取率的主要因素

本文采用了与大豆蛋白质提取的传统方法不相同的工艺条件，将离子强度及酸度作为主要控制因素，得到了在离子强度为０．６的ＮａＣｌ溶液中、提取温度为４５℃、ｐＨ值为６．４时豆粕中蛋白质的萃取率为最好；当ｐＨ为４．９时，大豆蛋白质的凝聚沉降率为最好的结论。从而提高了大豆蛋白的提取率及产品的纯度．     

计算机在化工生产过程中PH值控制的应用研究

在化工生产过程中，有些化学反应需要在一定的ｐＨ值下才能顺利实现．而溶液的ｐＨ值受许多因素的影响，它随酸碱浓度的变化呈严重的非线性反应，因而在各种不断变化的生产环境下，保持溶液ｐＨ值的稳定不是一件容易的事情。本文介绍了电镀生产过程中，如何采用计算机对镀镍液的ｐＨ值进行控制的一种应用研究．我们在五羊自行车厂电镀车间用计算机采用大林算法对镀镍液的ｐＨ值进行控制，以代替原来的人工控制，取得了相当满意的效果。     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-