In this paper , we study the influence factors about acid - base titration jump and the stoichiometric point deducing approximate calculation formula of acid - base titration . some useful results are obtained 摘要本文推导出了强酸强碱、一元弱酸弱碱、多元弱酸弱碱滴定突跃、化学计量点的近似计算式，用公式说明了影响滴定突跃的因素及化学计量点的位置，并得出了一些重要结论。
The main conclusions are summarized as follows : classical nucleation and growth mechanism only occurs near the phase boundary of the disordered phase , by which 8 " phase precipitates from supersaturated solid solution directly 主要研究发现：只有处在无序相界附近的合金沉淀机制基本为经典形核长大，相直接从过饱和固溶体中沉淀，序列为：过饱和固溶体化学计量比相长大。
Its oxygen - sensitivity is related to its oxidation and reduction process and non - stoichiometric ratio . in la _ 2nio _ 4 + system with excess oxygen , the conductivity is in proportion to o21 / 6 . the effect of doping on a and b site have been studied in this paper 其本身的氧化还原过程和非化学计量是其氧敏性的根源，在氧过剩的la _ 2nio _ 4 +系统中载流子浓度与氧分压的1 / 6次方成正比。
Abstract ： the applications of chemometric approaches , such as opt imization , multivariate calibration , artificial neural network , signal processin g , resolution , parameter estimation etc . , in capillary electrophoresis have bee n reviewed 摘要：综述了最优化方法、多元校正方法、人工神经网络、曲线分辨、信号处理等化学计量学方法在毛细管电泳分离分析中的应用，展望了化学计量学在毛细管电泳中的应用前景。
This paper reviews the utilization over the 20 last years of chemometrics methods in analysis of pesticide residues , including organochlorine , oranophosphorous , carbamate , and synthetic pyrethroid insecticides , along with herbicides and fungicides 摘要对近20年来化学计量学方法在农药残留（包括有机氯杀虫剂、有机磷杀虫剂、氨基甲酸酯类杀虫剂、拟除虫菊酯杀虫剂、除草剂及杀菌剂）分析测试中的应用进行了评述。
Tantalum oxide films were prepared by self - assembled middle frequency a . c . sputtering system . the contents and microstructure of the films were studies as the functions of oxygen percentage in sputtering gases and substrate temperature 论文采用自行组装的中频交流磁控溅射设备制备了氧化钽薄膜，考察了溅射气体中氧气含量、基底温度等对薄膜成分、结构的影响，并且通过优化工艺参数得到了接近化学计量比的氧化钽薄膜。
It includes symposia , monographs and reviews , statistics , optimal design of experiments and optimization methods , analytical signal processing , multivariate calibration , chemical pattern recognition , qsar , library searching and expert systems , chemometric education , with 168 references cited 内容涉及统计学与统计方法、试验设计与优化、分析信号处理、多元校正、化学模式识别、定量构效关系（ qsar ） 、数据库及专家系统、化学计量学教学等方面，共引用文献168篇。
( 3 ) a testing system consisting of pressure transducers , data - collecting card , computer and electrical - ignition instrument was designed and a flammable gas cloud deflagration experimental system was developed . based on the orthodoxy experiments , the experiments was conducted on c2h2 - air flame acceleration resulted from hemispherical porous barriers in hemispherical gas cloud . the relations between the explosion overpressure and its influence factors were summarized ( 3 )本文设计了由压力变送器、数据采集卡、计算机和电火花装置组成的测试系统，建立了可燃气云爆燃实验系统；以化学计量浓度的乙炔-空气混合物为实验介质，在正交实验的基础上，对半球形气云内部与气云同心的半球形多孔障碍物对火焰的加速作用进行实验研究，并归纳出爆炸超压与其影响因素之间的关系；同时还考察了障碍物数量对爆炸超压的影响。
The results indicate that ( a ) before heat treatment , with the increasing of substrate temperatures , content of lower valency ( tij + ) decreases , the stoichiometric proportion of o / ti in all samples is about 2 ; the films have amorphous incompact columnar fiber structure , and with the increasing of substrate temperature , the size of columnar fiber increases ; the films have good hyalescence in visible range and great absorbability at the wavelength of 350nm ; optical constants of the films are calculated from the transmittance spectrums in visible range by mathematical analysis of the orders of interference , the results show that the refractive ind 研究结果表明， ( a )热处理前，随着基片温度的增加，薄膜中的低价氧化钛含量逐渐减少，化学计量比趋于o ti = 2 ；薄膜具有非晶态不致密的柱状纤维结构，柱状纤维的尺寸随基片温度的升高而增加;薄膜在可见光范围内透明，在波长为35onzn时严重吸收，利用干涉级次法分析了薄膜的光学常数，结果表明，薄膜的折射率随基片温度的升高而增加，根据计算结果得到了tioz薄膜在不同基片温度下的折射率色散曲线。
And the results have good repeatability , , influence and its mechanism of substrate temperatures ( from 120 to 300 ) and heat treatment temperature ( 400 , ih ) on the chemical composition , micro - structure and optical properties of tio _ ( 2 ) thin film deposited at the condition of pressure in depositing chamber being 2 x 10 - 2pa and deposite rate being o . znm - s - 1 are studied through modern analysis technologies Tio _ 2薄膜的化学计量和晶体结构直接影响薄膜的性能，本文采用xps 、 xrd 、 sem和uv - vis分光光度计研究了热处理前后不同的基片温度条件( 120 、 200和300 )对薄膜成分、结构和光学性能影响的规律及其机制。
