Matter-element Extension Method Research Articles

A Systematic Approach to Quality Function Deployment with Extension Method

The major procedure of QFD is to identify the customers’ needs for the product and then convert into appropriate technical measures to fulfill the needs based on the company’s competitive priorities. The priorities of product characteristics can be obtained by translating important technical measures into product characteristics. According to their characteristics to identify the relevant engineering parameters, the prior engineering parameters will be selected as the key requirements to redesign. This article will concentrate on the creativity way of thinking “matter-element theory and extension method”, with the help of this method to assist to translate customer requirements (CRs) into product design attributes and engineering characteristics (ECs) can provide effect assistance for the designer to conceive new products comprehensively and deeply. The system for design decision-making will be developed and an innovative design case, wheelchair for the elderly, successfully demonstrates that the proposed design process is feasible and efficient.

Assessment of Groundwater Quality Based on Matter Element Extension Model

The basic theory and calculating processes of matter element extension method are discussed in detail. Mass balance simulation is used to study the changes of groundwater chemistry. Results show that calcite and dolomite are oversaturated, while gypsum, fluorite, and halite are unsaturated in the simulation path; so calcite precipitates, while gypsum, fluorite, halite, and dolomite dissolve. The changing tendency of Ca2+/Na+ is apparent. Because of the dissolution and precipitation of minerals, the content of each ion changes. Parameters of groundwater are basically within the permissible limits and meet the requirement of drinking water standards. By comparing the evaluation results obtained from matter element extension method, osculating value method based on entropy weight, and principal component analysis method, it is proved that matter element extension is an effective and reasonable method for groundwater quality assessment. The converting tendency of groundwater quality is judged based on the extension indexes; this characteristic is unique of matter element extension method.