Li P.,Shenyang Ligong University
Journal of Convergence Information Technology | Year: 2012
Because of the increasing size and the complexity of software, the software quality has become difficult to control and manage. Improving the quality of software has become the focus of software industry. Software quality assurance becomes an important approach for improving software quality, which provides developers and managers with the information reflecting the product quality through monitoring the execution of software producing task by independent review. The problem of evaluating the software quality with hesitant fuzzy information is the multiple attribute decision making (MADM). In this paper, we investigate the multiple attribute decision making (MADM) problems for evaluating the software quality with hesitant fuzzy information. We utilize the induced hesitant fuzzy ordered weighted geometric (IHFOWG) operator to aggregate the hesitant fuzzy numbers corresponding to each alternative and derive the overall value of the alternatives, then rank the alternatives. Finally an illustrative example has been given to show the developed approach.
Liu D.,Shenyang Ligong University
International Journal of Digital Content Technology and its Applications | Year: 2011
In this paper, we investigate the multiple attribute decision making (MADM) problems for evaluating the E-commerce system security with uncertain information. Then, based on the traditional grey relational analysis (GRA) method, calculation steps for solving multiple attribute decision-making problems with completely known weight information are given. The degree of grey relation between every alternative and positive ideal solution is calculated. Then, a relative relational degree is defined to determine the ranking order of all alternatives by calculating the degree of grey relation to both the positive-ideal solution (PIS). Finally, an illustrative example is given.
Zhang D.,Shenyang Ligong University
Asian Journal of Chemistry | Year: 2012
The adsorptive potential of barium-strontium titanate based on glass fiber filter (BBST) for iron and cobalt ions were investigated and the conditions of adsorption and elution were studied. A solid phase extraction method has been developed to separate and concentrate trace amounts of iron and cobalt ions from aqueous samples for the measurement by flame atomic absorption spectrometry. By the passage of aqueous samples through barium-strontium titanate based on glass fiber filter, iron and cobalt ions adsorb quantitatively. The results showed that the barium-strontium titanate based on glass fiber filter had adsorption capacity towards the iron and cobalt ions when the pH value was not less than 4. The adsorption capacities of barium-strontium titanate based on glass fiber filter for iron and cobalt ions were found to be 15.29 mg/g and 5.02 mg/L, respectively. The iron and cobalt ions could be completely eluted by 0.5 g/L EDTA. The iron and cobalt were concentrated successfully and the pre-concentration factors were all not less than 100. A new method for determination of trace iron and cobalt in water based on barium-strontium titanate based on glass fiber filter and flame atomic absorption spectrometry determination was proposed. The detection limits of this method for iron and cobalt were 0.06 μg/L and 0.05 μg/L, respectively. The method has been applied to the determination of trace iron and cobalt ions in tap, lake and river water samples with successfully results.
Wang Y.,Shenyang Ligong University
Applied Mechanics and Materials | Year: 2012
In the transmission system of drive axle, the gears' transmission performance of final drive and differential is the key to transmission system. Based on Automatic Dynamic Analysis of Mechanical System (ADAMS), the virtual gear meshing prototype of final drive and differential were established. Based on the Hertz elasticity impact theory, the contact forces between gears were built. The real-time dynamic simulation of gear meshing was achieved. The gears' transmission of final drive and differential in drive axle was simulated under limit conditions by imposing different torque in driving gear of final drive and differential gears. The curves of meshing force and angular speed of differential gears and driving gears of final drive are obtained. The theoretical reference is provided to the study of the dynamic characteristics in gear transmission system.
Wang T.,Shenyang Ligong University
Advances in Information Sciences and Service Sciences | Year: 2012
The product design process is the primary phase and the creative and challenging part in product lifecycle. The implementation effect of the follow-up manufacture process is directly influenced by design results that are also the major factor of controlling product cost. Along with increasing of product complexity, urging of market requirement and spreading of networked product development mode, product design theories and methods have attracted wide attention from academies and industries and become important research directions and application fields. In this paper, we investigate the multiple attribute group decision making (MAGDM) problems for evaluating the design of mechanical products with uncertain linguistic variables. We utilize the uncertain linguistic weighted harmonic mean (ULWHM) operator to aggregate the uncertain linguistic information corresponding to each alternative and get the overall value of the alternatives, then rank the alternatives and select the most desirable one(s) by using the formula of the degree of possibility for the comparison between two uncertain linguistic variables. Finally, a practical example for evaluating the design of mechanical products is used to illustrate the developed procedures.