In fact of the preparation of material , nanometer wo _ 3 was synthesized in a novel method by gas - state reaction with tungsten filament . further more , we designed a new type gas sensor based on hall effect 在材料制备方面,我们使用了一种新的wo _ 3粉末制备方法:采用气相反应法,以纯钨丝为原料,获得了wo _ 3纳米气敏材料。
Introduction of principle concerning chemical reation kinetics makes the homogenuous and heterogenuous oxidation reaction to obtain a certain development , however , it is believed that the heterogenuous reation is more approaching to reality 引入化学反应动力学原理使汞的均相和多相氧化反应机理得到一定发展，而多相反应被认为更接近实际。
Latest advances in application of ultrasonic technologies in catalytic chemistry were reviewed , including its application of nano - material preparation , active component loading and heterogeneous chemical reactions 摘要综述了近年来超声技术在催化化学领域应用研究的新进展，包括超声技术在纳米材料的制备、催化活性组分的负载及催化非均相反应等方面的应用。
The results showed the reaction between the mg and si powders was solid - state reaction and impurities such as mgo , mg3c2 : were usually produced resulting from the reactions with air or graphite crucible since mg was very active 结果表明： mg颗粒与si颗粒之间的反应是固相反应，杂质的引入是由于mg元素高度的活泼性能而混入的mgo 、 mg _ 3c _ 2等气相反应的产物。
Some antibacterial peptides such as pr - 39 , a member of cathelicidin family , can also be induced and expressed in liver as an acute - phase reactant . mouse - defensin - 3 ( mbd3 ) is only constitutively expressed in mucosal tissues 急性时相反应时，一些抗菌肽基因如cathelicidin家族中pr - 39等也能在肝脏中被诱导表达，作为一种急性时相反应因子参与组织修复和抗肿瘤免疫。
According to the very characteristics of certain biochemical reaction , immobilization of proteins on channel wall for inhomogeneous reactions , channel network design for homogeneous reactions and the advantages of performing biochemical reactions on microfluidic chips are investigated in details 对非均相反应的蛋白质在微管道中的固定技术、均相反应的管道设计技术以及在微流控芯片上集成生化反应的优越性等做了详细的讨论。
In the model , many processes or phenomena such as crack friction and growth , heat conduction , phase transformation of oxidant particulates , heat generation by viscous liquid layer , chemical reactions of gases in cracks , heat and mass exchange between phases of gas and solid , are described 模型描述了裂纹滑移扩展、热传导、含能颗粒相变、液化层粘性加热、裂纹内气相反应、气相固相质量能量交换及与裂纹扩展耦合等过程。
A new preparation method of nanocompsites via nanophase reactor , called adsorption phase reactor technology , was presented . the principle and characteristic of this technology was represented combined with literatures . the literatures were generalized and the researches at present were illustrated with examples 论文中着重介绍了利用纳米反应器制备纳米复合材料的新方法? ?吸附相反应技术，结合现有的文献阐述吸附相反应技术的机理和特点，列举了目前的研究进展，对文献进行了总结说明。
There is difference frequency measurement requirement for every part of pid regulating , difference between dynamic quality and static quality in response time and accuracy . according to these , it use the interrupt functions and high - speed counter of the simens s7 - 200 plc cpu226 basic unit and some peripheral circuit to measure frequency ; in software designed , the procedure frame of hydraulic - turbine governor and disperse process of parallel pid are analyzed , an improved pid algorithm is adopted to realize a pid regulation mode with variable structure and parameters ; the mechanical liquid - pressure system of the hydraulic - turbine governor is with electric - hydraulic converter unit of step motor . according to the drive character of five phase of response step motor , a variable frequency regulated voltage driver unit is designed in order to realize interface between plc and driver of step motor 本文利用s7 - 200plc自身的特点设计了频率测量单元，根据pid调节各个环节的特点，以及调速器动态特性、静态特性对频率测量的实时性和精度要求的不同，利用s7 - 200plc基本单元中内置的高速计数器以及相应的外围放大整形、分频电路，实现了水轮发电机组频率的测量；在软件上，对微机调速器的整个程序框架、并联pid的离散化过程进行了分析，选用改进的pid算法实现了变参数、变结构的pid调节模式；调速器的机械液压随动系统具有步进电机电液转换元件，采用五相反应式步进电机，根据其驱动特性设计了变频调压驱动器，实现plc与步进电机驱动器之间数字接口。
The pilot fuel model has been given to calculate the distribution of the liquid fuel and time of fuel pre - combustion , at the same time , analyzing the important action to the combustion of the natural gas in the combustion chamber of engine , determining the best quantity of pilot fuel . the explosive combustion model has been established to compute the pressure of the cylinder during the combustion , determining the main influence factors . the emission model has been established to forecast the co , nox emission 理论方面，提出了基于化学反应的燃烧模型?多组分气相反应系统的化学反应动力学模型，以此进行双燃料发动机的热力学?化学反应动力计算；引燃油燃烧模型，计算引燃油液滴的分布规律和滞燃期，验证引燃油在双燃料发动机燃烧过程中的作用，揭示不同喷油规律对双燃料发动机的影响，确定在不同负荷下的合理引燃油量；爆震模型，揭示爆震与工质能量释放间的关系和影响爆震的各种运转因素，确定合理的爆震依据，减小爆震倾向。
