查询词典 chemical process

Prior to 1871, photographers went through a development process where they had to coat the plate with wet chemical each and every time and process the image immediately.

之前， 1871年，摄影师经历了一个发展过程，他们在那里向大衣板块与湿化学的每一个时间和过程中的形象，立即。

Esterification process of a reversible step wereresolved as two irreversible steps,then chemical decomposition of wood components weredecreased in liquid acid catalyst.Experiments showed that crosslinking catalysts took catalysisrole on two process in the esterification,(1)five cyclic anhydrides formed by dehydration ofpolycarboxylic acids,(2)esters occurred by substitution between five cyclic anhydrides andwood.

实验中的反应过程使一般的酯化一步可逆反应，分解为两步不可逆反应，减少了液相酸催化过程的木材组分化学降解；交联反应催化剂对于多元羧酸类化合物与木材组分的酯化反应具有两个过程的催化作用：(1)多元羧酸脱水形成五元环酸酐中间体；(2)木材与五元酸酐中间体亲核取代反应形成酯。

The activated or leached process and their influence elements are studied by 1DREACT software package of coupled mass/heat transfer and chemical reaction dynamics of water-rock interaction, according to the geological and geochemical characters of fine disseminated gold deposits.(1) Water-rock reaction time is not the important influence element of activating gold;(2) At first, activating capability of hydrothermal solution increases with the increasing of total sulfur activity; after lga〓≥-4, the content of activated gold in solution is mainly related to original content of gold in wall rock, and does not visibly dependent on total sulfur activity.(3) It is a complicated nonlinear process of influence of activating gold capacity of hydrothermal solution with the change of temperature, in general, 220 ℃ is most favorable to gold activation.(4) The influence of oxygen fugacity on gold activation has a multiple functions coupling nonlinear effect, in general, Igfo〓=-41 is most favorable to gold activation.(5) Solubility of gold in fluid decreases with the increasing of velocity of flow, the product of velocity and aurous solubility reaches maximum when velocity is 0.2～0.5m〓m〓. yr〓, i. e. this scope of velocity is most favorable to gold activation.

利用1DREACT水-岩相互作用反应-输运耦合动力学软件包，根据微细浸染型金矿床地质地球化学特征，计算机模拟研究了金的活化、浸取过程及其影响因素，发现：(1)金活化过程中水-岩反应时间不是其主要制约因素；(2)热液对金的活化能力开始随总硫活度的增高而增高，当lg a〓≥-4后，热液中活化金的含量将主要与围岩中金的初始丰度有关，而对总硫活度无明显依赖关系；(3)温度对热液浸金能力的影响是一个复杂的非线性过程，总体而言，220℃最有利于金的活化；(4)氧逸度对金活化的影响呈现出一种多因素叠加的非线性效应，总体而言，lgfo〓＝-41最有利于金的活化与浸取；(5)流体中金的浓度随流体流速的加快而降低，流速与金浓度的乘积在流速为0.2～0.5m〓m〓。yr〓时达到极大，即0.2～0.5m〓m〓。yr〓的流速范围最有利于本类矿床的金的活化。

The ecological process of Carex meyeriana mire wetland including physical, chemical and biological process was studied.

乌拉苔草沼泽湿地分布较广，是沼泽湿地生态系统中的重要类型。

CIPO's key techniques, which include object orientation technology, communication, database and user graphic interface, are studied and then implemented in mo delling and simulation of a typical chemical process called Tennessee Eastman process as a case study.

以一个典型的化工过程———Tennessee Eastman过程为例，对开发化工过程计算机仿真平台所需的关键技术进行了研究，包括面向对象技术、通信、数据库、用户图形界面，并通过模拟及仿真实现了这些技术

The sand dunes analyses data have shown they mainly consist of well sorted, symmetry skewness and find sands, and the kurtosis peak is narrow or very narrow. There are abundant impacts of mechanic process on the surface of quartz grains. The traces of eolian process often superpose on the traces stamped by river and beach processes. The dish--shaped concavities and mechanic pits are the most common surface textures, but the barchan concavities and curved grain edges are indicated the marks by eolian environment. The heavy minerals assemblages of coastal dunes are dominated by relatively high specific gravity which have stable chemical properity suggesting the mordern high dynamic environments of coast area. The depositional structures of coastal dunes are typified by corss--bed sets composed of steep foreset laminates and gentle windward dipping sets. It also contains some shell fragments and strong worn foraminiferal tests that are impossibly found in inland desert. On the other hand, the sandy deposits of the continental shelf of East China Sea are with wide range of grains, and the depositional pattens are quite complicated.

海岸沙丘是晚全新世以来相对稳定的海平面背景下的海岸带风成堆积，其沉积特征是以细沙为主，分选好，搬运方式以跃移占绝对优势，偏度上近对称，峰态窄到很窄；石英颗粒表面机械作用形态丰富，风成作用形态叠加于河流和海滩过程形态之上，碟形坑和撞击麻点是最为常见的表面形态，而新月形坑和曲脊是其指示性的特征标志；沙丘沙重矿物以化学性质稳定、比重较大的种类为主，反映了海岸带目前的高能动力环境；海岸沙丘沙的沉积构造以高角度前积层和低角度顶积层组成的交错层理为典型特征，同时还含有少量内陆沙漠所没有的少量贝壳碎屑和强烈磨损的有孔虫壳体。

This paper starts from analyzing the internal machinism of chemical process and proceeds with studies of how to apply Input Training Neural Network and RBF Neural Network to model the complex process of pyrolysis.

将机理模型计算数据与现场采集数据相结合，获得正交性和完备性较好的训练样本数据，增强模型的外推能力和可信度。研究应用粒子群算法解决乙烯裂解炉的操作优化。

The development of a new kind of radioactive drug includes the research work in its technological process, quality requirements, preclinicopharmacological study and clinical study, The research unit, when designing the technological process for a new drug, muststudy the physical and chemical properties, purity (including pureness of radionuclide), testing method, pharmacology, toxicity, nuclein animal dynamics, radiospecific activity, dosage, pharmaceutical forms and stability of that radioactive drug.

研制单位在制订新药工艺路线的同时，必须研究该药的理化性能、纯度及检验方法、药理、毒理、动物药代动力学、放射性比活度、剂量、剂型、稳定性等。

In this dissertation , Physical and chemical properties of raw material was studied first, then sodium model-modification of it was researched. Next, preparation of FILM in traditional process using montmorillonite after model-modification was in research. After that, we studied the preparation of PILM in hydrothermal process using montmorillonite without being model-modified. Finally, products in experiments were characterized and Analyzed by XRD, IR, DTA.

根据目前国内外的发展现状，针对存在的问题，本课题做了以下几个方面的研究：首先对采用的基质材料的物化性进行了研究；然后研究了其钠化改型的工艺方法；接下来研究钠化后的蒙脱石用常规工艺合成PILM；在此基础上提出并研究了水热法制备PILM和其柱化剂的新工艺；最后对制备的试样通过XRD、IR、DTA等进行了分析和表征。

The rheological property of a bisphenol A cyanate resin was investigated by means of parallel plate method, it was modified by isothermal precure process. The effects of precure process on the chemical structure of resin were studied by IR, DSC and GPC methods.

本文采用平板法研究了一种双酚A型氰酸酯树脂的流变特性，通过恒温预固化的方法对其进行改性，并借助红外光谱、差示扫描量热法和凝胶渗透色谱法等手段分析了预固化对氰酸酯树脂化学结构的影响。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。