Layout optimization for multi-bi-modulus materials system under multiple load cases

Financial support from the National Natural Science Foundation of China (Grant No. 51179164) and the Australian Research Council (Grant No. DP140103137) is acknowledged

Rough Set Approaches to the Problem of Supplier Selection

The data mining approach of rough set theory is being adopted to study the multi-index question of supplier’s evaluation and determination in order to reveal the determining rules hidden in the historical evaluative data. After introducing some basic notions of rough set theory, this paper uses a sample to tell the steps of the deducing process in detail, and figures out some satisfying rules of supplier’s determination and weights of various attribute’s indexes which have been compared to other methods after the calculation. All of these illustrate the method of rough set theory can be used in the area of supplier’s selection and solve them with great efficiency

Performance of boilers equipped with vapor-pump (BEVP) system equipped with a novel air-flue gas total heat exchanger

Because of high humidity and nonlinearity of flue gas, waste heat from flue gas is hard to recovery. Boilers equipped with vapor-pump system is developed to solve the problem caused by high humidity. In this system, double spray towers subsystem is equipped to realize total heat waste heat recovery. However, caused by nonlinearity, limited waste heat recovery efficiency is just 83 % (1 segment) and 93 % (2 segment). Further, based on boilers equipped with vapor-pump (BEVP) system, enthalpy wheel system is developed to solve the problem caused by nonlinearity. However, enthalpy wheel system cannot solve the problem completely. In this article, a novel air-flue gas total heat exchanger is put forward to achieve full waste heat recovery. In this system, waste heat recovery efficiency limit is up to 100 %. Then, the limit condition of total heat transfer process is discussed. Performance of the total heat exchanger is discussed and compared to double spray towers system and enthalpy wheel system. As the result, considering heat transfer temperature difference, the total heat exchanger total heat transfer efficiency of the total heat exchanger is 7 % higher than 2-segment BEVP system and 10 % higher than enthalpy wheel system.</p

Analysis and Discussion on the Calculation Formula of the Classical Monitoring Method of the Permanganate Index (IMn)

In this paper, the calculation formula of the classic monitoring method of the permanganate index (IMn) is analyzed and deduced, the difficult points of the calculation formula are discussed in the process of analysis and derivation, and the common questions about the formula in the environmental monitoring industry are solved. Keywords Permanganate index; Formula of calculation; Parsing; misgiving

The Determination of Chemical Oxygen Demand in Water Quality Analysis

The research is supported by a Project Funded by the brand professional project form Yancheng teachers college (2016) and the teaching reform and practice of medicinal chemistry (2018YCTUJGY006) and the Flagship Major Development of Jiangsu Higher Education Institutions”(PPZY2015B113)。 Abstract Chemical oxygen demand is one of the most important items in water quality analysis. The method is mature and the operation is relatively simple. In this paper, several detailed problems in the determination of chemical oxygen demand (GB11914-89 dichromate method) are presented, and solutions are proposed according to the practical analysis and practice. Keywords Chemical oxygen demand; Determination; Uniformity; Dilution factor; Interference eliminatio