查询词典 chemical method

The dispersion process of nano TiO2 in water medium with physical and chemical methods was studied using sedimentometric method.

用沈降法研究了纳米TiO2在水性介质中进行物理和化学分散的工艺。

Because chemiluminescence is a rapid and sensitive method, it can be used to study other reaction, such as photochemical reaction and other chemical reaction that can produce active chemiluminescent reagent.

由于化学发光是一种快速、灵敏的检测方法，因此它在研究这些反应产生不稳定的中间体时显示了极大的优越性，并获得了其它方法所不能获得的一些结果。

The state-of-the-art of chemical process and equipment intensificationtechniques is reviewed. A novel concept of compact industrial furnace isproposed, in which tube with static mixer for partly intensification is determined. 2 A virtual engineering scale-up approach is put forward. The key points toimprove the scaling-up efficiency include two tools: one is rapid generationtechniques for computational models in which a re-use library is built, the otheris rapid prototyping manufacturing, employed for rapid generation forexperimental models.3 The tube is the key component for industrial furnace. Material microstructure,high temperature strength, and casting process of the tube with static mixer arediscussed as compared with those of traditional tube. Some special features ofthe static mixer tube are demonstrated.4 An evaluation method of velocity-based disturbance effect of fluid field wasproposed.

主要内容包括： 1、总结了化工过程强化技术的现状和强化研究的途径，提出了紧凑式工业炉的概念，确定用静态混合式炉管进行局部强化。2、提出了静态混合式炉管应用的虚拟工程放大研究方法，指出研究中提高效率的关键是计算模型快速生成技术和实验模型的快速原型制造。3、对工业炉的关键部位——炉管，从材料成分、强度、制造等方面对静态混合式炉管的设计、制造进行了分析，与常规炉管对比，说明了静态混合式炉管的独特性和要求。4、应用快速原型方法，迅速、准确地得到了符合精度、强度要求的静态混合式炉管模型，产品的精度和强度完全符合要求，提高了模型制造效率。5、应用计算流体动力学方法，进行静态混合式炉管的工程放大研究。

Silica glass was synthesized by plasma chemical vapor deposition method, which uses inductively coupled plasma as theheat source.

用高频等离子体作为热源，采用化学气相沉积法合成了石英玻璃样品。

This Al -free 980nm pump laser have many merits, such as improved catastrophic optical damage level; no degradation due to oxidation of aluminium during fabrication process and laser operation, which is desirable characteristic for multi-step growth; lower electrical and thermal resistance with GalnP cladding; better carrier confinement with GalnAsP confinement layers; Selective chemical etching between GaAs and GalnP maks precisely control for fabrication of stripe geometry lasers.· Calculated the physical parameters of ternary and quaternary III - V compoundsby interpolation formulas based on curve fits or on a linear regression, such aslattice parameter, band gap, and refractive index.· Using luttinger-kohn Hamiltonian-based propagation-matrix method presentedby S.L.

这种无Al980nm半导体激光器可以提高激光器出现腔面损伤所需的能量，消除在生长过程和应用过程中由于Al的氧化而使激光器的使用寿命缩短的问题，便于激光器的多次生长；以GaInP为盖层可以降低电阻和热阻；可以精确的控制GaAs和GaInP之间的化学刻蚀，便于激光器几何形状的控制。

Poly lactic acid is a biodegradable and processable high polymer, which is widely used in chemical engineering, agriculture and pharmaceutical industry. D-LA is hence going to form a huge potential market. Fermentative production of D-LA by microorganisms is the primary method in industry, which is applied by several factories abroad.

聚乳酸因具有优良的生物可降解性和加工性能，应用于化工、农业和医药等方面，因而D-乳酸市场潜力巨大。D-乳酸的工业生产主要应用微生物发酵法，国外已有2~3家D-乳酸生产企业，而我国目前尚无D-乳酸制备研究或工业化生产的报导，该技术亟待发展。

Draw a conclusion, a better parameters was found in fabrication of polycrystalline silicon thin film on glass at middle temperature: amorphous silicon film to be annealed were deposited at a certain temperature on glass substrate and fused quartz by plasma enhanced chemical vapor deposition method, using SiH_4, H_2 mixture.

具体沉积工艺参数：真空度5.6×10~(-4)pa，沉积室中电极间距2cm，工作气压133.3Pa，氢稀释比98％、衬底温度350℃、射频功率60W；退火条件：850℃下光退火5分钟。

Pulse fast thermal neutron analysis technology is a better method than chemical analysis used in coal industry.

应用脉冲快热中子分析技术代替煤炭行业原来使用的化学分析方法，不但节约成本，而且经过努力可以实现在线分析，是一种非常有前途的分析方法。

Pulse fast thermal neutron analysis technologyis a better method than chemical analysis used in coal industry.

应用脉冲快热中子分析技术代替煤炭行业原来使用的化学分析方法，不但节约成本，而且经过努力可以实现在线分析，是一种非常有前途的分析方法，然而因HPGe探头进口价格昂贵且不易维护，而不适合中国使用。

Downy mildew is one of the most serious grape diseases,the usual treatment method presently is the application of chemical fungicide,but excessive spray brings many severe problems.

霜霉病是危害葡萄最严重的病害之一，目前采用的主要防治手段是喷施化学农药，但其用量过多也带来许多严重问题。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。