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The invention relates to a dynamic matrix control system of high-purity distillation, which comprises distillation tower, intelligent checker, DCS system, superior host, and on-site bus, while they are connected. The control system uses tower product group as the object variable, and the reflux ratio and reboil ratio as control variable; the superior receives history temperature and pressure data from the DCS real-time database, via the predict control and dynamic matrix controller, to obtain the output values of present controller as reflux ratio and reboil ratio, then feedback said two values to DCS system, to function the distillation object. The invention can confirm the high-purity stable operation, with better dynamical control.
本发明公开了一种高纯精馏的动态矩阵控制系统和方法;系统包括:精馏塔、智能检测仪表、DCS系统、上位机和现场总线;所述精馏塔、智能检测仪表、DCS系统和上位机通过现场总线依次相连,实现信息流的上传和下达;本发明所涉及的控制系统采用塔双端产品组分为被控变量,回流比和再沸比为对应的控制变量;上位机从DCS实时数据库中获得历史的温度、压力等数据,通过推断控制环节和动态矩阵控制器环节,得到当前控制器的输出值-回流比和再沸比,再把控制器输出值返回给DCS系统,实现了对高纯精馏过程的双端产品高纯控制,对双端组分的高纯度平稳操作,具有很好的动态品质和控制效果。
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Objective:To eliminate the rejective reaction of host-versus-graft in the SRCA,a new kind of immunosuppressed mice model was established.
:目的:建立一种适用于肿瘤药敏人癌肾包膜下移植法的免疫抑制小鼠模型,克服普通小鼠的免疫排异反应及裸鼠费用昂贵的缺陷。
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From the results of our studies we deduced that sucrose itself in the pith tissue of corn stalk could rule as a represser in someway to suppress the pathogen producing enzyme or toxin which can destroy host cells, or it could destroyor inactivate the enzyme produced by the pathogen, or it was not suitable for toxin surviving in it.
同时,从研究结果我们推断蔗糖本身可能具有阻遏镰刀菌产生酶类或毒素作用,病菌在侵染抗病品种过程中可能因寄主组织中蔗糖含量高,而导致病菌产生的可破坏寄主细胞组织的酶类受到阻遏或活性受到钝化;或者蔗糖不利于致病菌毒素的存活。
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From the fields of regional crust-mantle structure, metallogentic settings, history of tectonic-magmatic activity, distribution of high antimony anomaly, characteristics of deposit, origin of ore-forming materials (including Sb, C, Si, S, solution and associated elements), black dikes, the relation of deposit and mantle metasomatism fluid is expounded by means of geology and geophysics. Xikuangshan antimony deposit is proved to be a typical vein deposit formed by mantle metasomatism fluid. On the basis of this knowledge, the prospecting criteria of blind orebody of the deposit are given as follows: extensive structuer which indicating the activities of mantle metasomatism fluid, change of host rocks (especially exsisting shale barrier bed), silication and carbonization alteration.
文中对地幔交代流体组成、性质、活动特点及其成岩、成矿作用作了综述与探讨;从锡矿山区域壳幔结构和成矿背景、地质构造-岩浆活动史、高锑地球化学场结构分析、矿床特征、成矿物质(包括Sb、C、Si、S、流体及伴生元素)、与成矿有时空联系的暗色脉岩等方面入手,利用地质、地球物理、地球化学手段多方面论述了矿床与地幔交代流体活动的关系,论证了锡矿山超大型锑矿的地幔交代流体成因,并以此为基础提出盲矿体地质找矿标志:即指示地幔交代流体活动的构造,尤其是具有成矿元素和碱质异常、热液蚀变的断裂构造;有利的岩石物理化学性质;硅化、碳酸盐化围岩蚀变等。
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It was found that the zone of siphonaptera and host animals fauna elements changed through investigation, especially the quality change of a representative special species.
通过调查研究发现,这一地带蚤类及宿主动物的区系成分发生了改变,尤其是具有代表性的特有种发生了质的改变。
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THE HOST: Now every so often there goes along a writer with an idea which is so snappily expressed and so accurately descriptive of the world around us that we all start using it in conversation, it becomes part of language.
主持人:经常会有作家用犀利的观点准确地描述周围的世界,使得我们在谈话中都会提到这个观点,这个观点也就变成了语言的一部分。
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The Long Tail Culture THE HOST : Now every so often there goes along a writer with an idea which is so snappily expressed and so accurately descriptive of the world around us that we all start using it in conversation , it becomes part of language .
经常会有作家用犀利的观点准确地描述周围的世界,使得我们在谈话中都会提到这个观点,这个观点也就变成了语言的一部分。
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Infection occurs during the flowering stage of the host plant, when its developing ovary comes into contact with infectious sporidia, a stage in the lifecycle of the pathogen Tilletia indica.
寄主植物在开花期受侵染,病原菌Tilletia.indica生活史某一阶段产生的孢子侵入发育的子房。
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Orebodies occur in a fault near the axial region in the southern limb of the Jinjinghe-Hujiamiao inverted secondary anticline in the southern limb of the Hongyansi-Heishan composite syncline. Host rocks are dolomitic rocks in the middle and upper parts of the Devonian Qingshiya Formation. Their spatial distribution is obviously controlled by an interlayer fracture-fissure zone near the axial region in the steeply dipping southern limb of an anticline. Ores are dominantly of nodular and stockwork types and the feature of epigenetic mineralization is very pronounced.
矿体产于红岩寺—黑山复式向斜南翼金井河—胡家沟次级背斜南翼近轴部断裂中,赋矿岩石为泥盆系青石垭组中上部白云质岩,其空间展布明显受背斜陡倾南翼近轴部的层间断裂-裂隙带构造控制,矿石主要有团块状和网脉状,其后生成矿现象非常明显。
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The high activity can be attributed to the following factors: 1 Because of the perovskite structure of the host materials, the positive and negative electric charge center is not superposable, and there is a electric field which can separate the photo generated electrons and holes efficiently in the microscopic field.
以层状基质热稳定性分析为依据,经过对制备方法的优化,在不同温度下进行硫化处理,在对催化剂进行产氢性能研究时发现,在以硫化钠和亚硫酸钠为牺牲剂的产氢体系中,插入硫化镉的复合层状催化剂负载一定量铂以后,具有较高的连续的光催化分解水的能力。
- 推荐网络例句
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Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.
在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。
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In fact,I've got him on the satellite mobile right now.
实际上 我们已接通卫星可视电话了
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The enrich the peopling of Deng Xiaoping of century great person thought, it is the main component in system of theory of Deng Xiaoping economy, it is a when our country economy builds basic task important facet.
世纪伟人邓小平的富民思想,是邓小平经济理论体系中的重要组成部分,是我国经济建设根本任务的一个重要方面。