一种新方法合成邻氰基苯甲酰胺镧

本文采用邻苯二甲酰亚胺和三乙酰丙酮镧为原料 ,在 N2 保护下 ,以硼酸为催化剂 ,用简单方法合成了新型荧光配合物邻氰基苯甲酰胺镧 ,经元素分析 ,红外光谱、紫外光谱、荧光光谱确定了配合物的组成、结构     

硫代焦磷酸酯类阻燃剂的合成

实验合成了硫代焦磷酸酯C_(10)H_(20)O_4P_2S_4,并用色谱法测定该化合物的纯度.使用元素分析、红外光谱及质谱分析技术对该化合物的化学组成及化学结构进行了检测.该化合物具有较好的阻燃性.目前,文献中尚未见有该合成法及用做阻燃剂的报导.     

Online process monitoring for complex systems with dynamic weighted principal component analysis☆

Conventional multivariate statistical methods for process monitoring may not be suitable for dynamic processes since they usually rely on assumptions such as time invariance or uncorrelation. We are therefore motivated to propose a new monitoring method by compensating the principal component analysis with a weight approach. The proposed monitor consists of two tiers. The first tier uses the principal component analysis method to extract cross-correlation structure among process data, expressed by independent components. The second tier estimates auto-correlation structure among the extracted components as auto-regressive models. It is therefore named a dynamic weighted principal component analysis with hybrid correlation structure. The essential of the proposed method is to incorporate a weight approach into principal component analysis to construct two new subspaces, namely the important component subspace and the residual subspace, and two new statistics are de-fined to monitor them respectively. Through computing the weight values upon a new observation, the proposed method increases the weights along directions of components that have large estimation errors while reduces the influences of other directions. The rationale behind comes from the observations that the fault information is associated with online estimation errors of auto-regressive models. The proposed monitoring method is exem-plified by the Tennessee Eastman process. The monitoring results show that the proposed method outperforms conventional principal component analysis, dynamic principal component analysis and dynamic latent variable. ? 2016 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. Al rights reserved.     

颤振模型对稳态误差分析的影响

通过理论分析和计算机仿真研究了经典切削颤振模型的稳态误差,发现该误差值随切削条件的变化而大幅度变化,这导致数控机床切削动态特性的仿真结果严重失实。在分析经典模型不足的基础上建立了一个新的切削颤振模型,理论分析和仿真表明新模型的稳态误差趋于零,它为数控机床的切削动态特性仿真提供了可靠的数学模型。     

Comparison de trois méthodes d'estimation par microscopie des aires de surface projetée de systèmes dispersés

In the field of particles analysis by microscopy, a comparison of estimation of areas of projected surface of particles has been made by simulation.Three methods have been studied: the B.S. 3406 graticule, a rectangle graticule derived from that proposed by B.S. 3406 and a new method with squared reference grids.The results have been tested by a variance analysis on a balanced incomplete block design.In the case of non-uniform particles, it seems possible to advocate the new grids method.     

全氧燃烧玻璃窑炉的寿命浅析

通过对国内外部分全氧燃烧玻璃窑炉的寿命统计,非正常停炉和常见故障等问题分析,找出影响窑炉寿命的因素,提出要以规范化、科学化、系统化的思维,通过新材料、新技术、新工艺的运用有效延长全氧燃烧玻璃窑炉的寿命,对目前全氧燃烧窑炉的建设、推广应用有积极的参考价值。     

非离子表面活性剂聚乙氧基衍生物-羟值的分析

本文报导了非离子表面活性剂聚乙氧基衍生物-羟值的一种新的分析方法.该方法突出的优点是短时间完成分析全过程,并获得与常规乙酸酐同样的分析效果,与标准样品进行比较实验,分析准确率可达98%以上.     

国产染色淀粉片剂法检测工业α—淀粉酶的活力

我们采用具有双反应基团的国产活性染料Ｍ－８Ｂ与马铃薯淀粉经共价结构制成的红色染色淀粉片,已可成苗取代原有国外淀粉片剂检测工业用α－淀粉酶的活力检测。新开发的方法可缩短反应时间、简化检测工艺、降低检测成本,并且所得的精密度和准确度均可满足用户需要。     

存在严重杂质干扰的酸性镀锌溶液的分析

当酸性镀锌溶液存在严重杂质干扰时，传统分析方法就无法准确测定镀液中各主盐的含量。给出了一组新型分析方法，分别测定了原料KCl的纯度，并测定了镀液中ZnCl2、KCl及H3BO3的含量。通过与传统方法测试结果比较表明，新方法步骤简便、快捷，消耗低，精确度高，在实际生产中取得了很好的效果。     

适用于大型浸槽结构设计的新方法研究

以汽车涂装生产线中大型浸槽槽体的结构设计为例,介绍了一种在液体静压作用下浸槽结构设计的新方法。并采用 Inventor有限元分析技术分别建立了采用传统方法设计和新方法设计的槽体模型,对其进行分析计算与比较,得到了各部位的应力和形变情况,指出了设计的薄弱部位并进行优化,仿真结果表明采用新方法设计的大型槽体结构更为合理,其经济性能也更为优越。     

Total oil analysis of soybeans by simultaneous grinding and solvent extraction

A new, rapid method for total oil analysis of soybeans is proposed in which ground soybeans are mixed with solvent and further ground in a closed homogenizer until the oil is completely dissolved. A sample of the slurry can then be filtered and the oil content determined by evaporating the solvent from a measured amount of miscella. Parameters studied included times and speeds needed to produce sufficiently small particles so that all the oil was dissolved. The new analysis compared favorably with conventional Goldfisch extraction for total oil of soybeans. Preliminary experiments indicated that rapeseed could be extracted by the new procedure without preliminary grinding. Published with the approval of the director of the Arkansas Agricultural Experiment Station.     

3－乙酰基酚酮还原新途径的研究

探讨了从３－乙酰基酚酮出发经甲胺基化、还原、水解合成了３－（２－羟乙基）酚酮的新合成路线，使总收率从原来的２０．５％提高到５９．２％。所合成的化合物３为尚未见文献报道的新化合物。其结构已经红外光谱、核磁共振谱及元素分析征实．     

Modeling and simulation of solvent extraction processes for purifying rare earth metals with PC88A

A new simulation logic and thermodynamic equilibrium analysis algorithm combined with a new model simplification technique was developed to simulate the solvent extraction process for purifying rare earth metals from chloride solution with 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (PC88A) as a solvent. The proposed model simplification method significantly reduces the number of the nonlinear equilibrium equations to be simultaneously solved to overcome the initial guess problem and obtain numerically stable convergence pattern in solving the equilibrium analysis problem and performing the rigorous simulation of the extraction process. A new equilibrium analysis algorithm on the basis of the simplified nonlinear equilibrium equations is also proposed to estimate the equilibrium concentrations by solving the rigorous first principle extraction model. Finally, a solvent extraction simulator is developed to estimate all the concentrations of all the stages of the solvent extraction process by solving the equilibrium analysis problem at each stage in a sequential way. The proposed simulator doe not suffer from the initial guess problem and shows very robust convergence pattern without any numerical problems.     

碱矿渣水泥硬化体孔结构的分数维特征

将分形和分数维概念用于碱矿渣水泥硬化体中微孔结构的研究,并通过对压汞仪测定孔结构(mercury intrusion porosimetry)测试数据的分析证明:碱矿渣水泥硬化体中微孔结构具有分形特征,其容积分数维越大,微孔占有空间的结构越复杂.因此,该方法为水泥硬化体中微孔结构的研究提供了一种新方法.     

应用分析设计规范实现化工设备的新开发

分析和比较了GB 150常规设计规范和JB4732分析设计规范的特点及优劣势,介绍了2个采用分析设计规范成功实施的实例.认为,由于常规设计的局限性,已越来越难满足化工新产品、新工艺开发过程中对压力容器设计的合理性、安全性和经济性等方面的要求,不利于新型设备的开发和使用;JB 4732-1995分析设计规范所采用的分析设计法是工程与力学紧密结合的产物,可以解决压力容器常规设计所不能解决的问题,反映了近代设计的先进水平.分析设计规范的大量应用将有力的推动化工容器设备的创新开发.     

新型黑液水煤浆的燃烧特性及动力学分析

采用SDTQ600型差热分析天平,利用YG-DTG-DTA(即热重-微分热重-差热)热分析技术研究了新型黑液水煤浆的热分析特性,并与煤粉的燃烧特性进行了比较.结果表明,由复合液制取的水煤浆具有着火点较低,燃尽性能较好的燃烧特性;动力学分析得出各燃料表观活化能从大到小顺序为:永城无烟煤(YM)、平顶山烟煤(PM)、永城新型黑液水煤浆(YM-CWS)和平顶山新型黑液水煤浆(PM-CWS).     

Synthesis and properties of 2D-titanium carbide MXene sheets towards electrochemical energy storage applications

The cult MAX phases and MXenes has been a point of an attractive new family of 2D materials for diverse applications. In the present work, titanium carbide MXene sheets have been prepared by etching aluminium from titanium aluminium carbide MAX phase. The sample was investigated by X-Ray diffraction, FESEM, TEM and RAMAN analysis. XRD analysis revealed that the synthesized MXenes were formed in hexagonal crystal system and FE-SEM analysis showed that titanium carbide sheets were exfoliated. Raman analysis showed that the lower modes, which correspond to the “A” phase, disappeared due to the removal of aluminium. The electrochemical performance of the synthesized MXenes towards supercapacitor applications was further investigated using various electrochemical techniques like cyclic voltammetry (CV), charge-discharge and impedance analysis. Results showed that the new material showed an excellent performance in charge storage applications.     

采样分析与工艺开发

用实例阐明了采样分析是工艺开发的重要环节。在各种催化裂化新工艺研究和工业试验中,做好催化经气体的采样分析,严格把关分析方法与程序,对探索新工艺最佳操作参数和取得可靠的物料平衡数据具有重要的影响。     

热重-红外光谱联机分析方法在化学化工、高分子材料和药物热分解过程研究上的应用

本文介绍一种新的热分析仪器──热重－红外光谱联机分析仪的工作原理和分析过程。并通过苦干实际例子,介绍了热重－红外光谱分析方法在化学化工、高分子材料和药物等的耐热性能和热分解（降解）过程研究中的应用。     

A unique coordination chemistry of sodium

A new coordination chemistry of sodium has been developed by complexing it with a non-chelating neutral nitrogen donor ligand hexamethylenetetramine (urotropine) in presence of cadmium(II) iodide and the new coordination compound has been characterized by X-ray single crystal structural analysis.