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28 February 2015, Volume 18 Issue 1 Previous Issue    Next Issue

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practice & application

A Study of Fuzzy Synthetic Evaluation for Water Quality Assessment Based on Rough Set Theory An Yan, Zou Zhi-hong, Wang Xiao--jing 2015, 18 (1):  1-05.  Abstract ( 1778 )   Save Due to the subjectivity of selecting indexes and the difficulty of calculating parameter weights, rough set is introduced to perform attribute reduction to eliminate irrelevant and unimportant parameters. Attribute importance degree in rough set is applied to determine the weights of the parameters after attribute reduction. Then, a fuzzy synthetic evaluation is used to assess water quality. It is found that the results by this method are almost the same as those by traditional fuzzy synthetic evaluation. In addition, rough set attribute reduction and determining weights by attribute importance degree can reduce input space dimensions and simplify the process of water quality assessment. References | Related Articles | Metrics

A Research on Coal and Gas Outburst Risk Prediction Based on AHP-GRA Yu Hai-yun, Yang Hui-ming 2015, 18 (1):  6-10.  Abstract ( 807 )   Save According to the basic principle of AHP-GRA (analytic hierarchy process-grey relational analysis) model, analyze the influence of index of system’s outburst danger, and using correlation analysis to streamline tertiary indicators in order to reduce the sample size. By adding weight and optimize the Gray model, to improving the convergence speed, While increasing the accuracy of prediction model. Through regional analysis, combined with the instance, validate that the model can effectively predict the outburst dangerous level of coal mine system. References | Related Articles | Metrics

An Energysaving Design of Hydraulic Cylinder Based on  Life Cycle and Modularization Zheng Hui, Liu Lei 2015, 18 (1):  11-16.  Abstract ( 1690 )   Save To quantitatively analyze the energy-saving design of hydraulic cylinder, the energy consumption in the whole life cycle is considered as the research object. Combining life cycle with modularization analysis, a topological structure of hydraulic cylinder is built according to the extenics theory, and the concept of energy-saving design unit is put forward. The indexes of cost, environment and efficiency are considered to analyze and evaluate energy-saving design unit step by step to obtain the optimal design scheme of energy saving. The results show that this method can accurately evaluate the synthetical indexes of energy-saving design unit at different levels and effectively control the energy consumption. Finally, the cylinder of a particular model hydraulic cylinder is taken as a case, by which the life cycle stage of parts machining is analyzed to prove the feasibility and practicability of the method. References | Related Articles | Metrics

The Role of Visual Management of Visual Cues in Passengers′ Wayfinding Behavior in Virtual Waiting Hall Duan Qi, Qi Er-shi, Shi Ying-jie 2015, 18 (1):  17-23.  Abstract ( 1685 )   Save  The consistency of passengers′ visual information needs and information supplied by visual cues in virtual waiting plays a role in passengers′ way finding behavior. By controlling the consistency of two virtual cues (dynamic transport timetable & layout of ticket check) and users′ visual needs, a study is conducted into the time to complete the task, time to scan the timetable, and time to act as indicators to evaluate the function of visual cues in different ways, which provides a scientific basis for visual management in railway stations. The results show that passengers′ performance in wayfinding tasks are better when information sequence on the timetable and users′ visual coding needs are kept consistent. Besides, compared with layout of sequence and layout of parity, layout of AB is an ideal type of ticket check which can induce passengers′ spatial cognition in a relatively short time. References | Related Articles | Metrics

A Study of VDT Fatigue Based on the Bayesian Network Liu Li-zhuo, Li Zheng 2015, 18 (1):  24-30.  Abstract ( 1728 )   Save VDT，as the representative of modern labor assignment，can enhance the working efficiency and seriously affect the physical and mental health of the operators. A method of using Bayesian network is put forward to analyze fatigue, establishing fatigue prior Bayesian networks, and then the posterior Bayesian networks by examples. The model is analyzed to find the key factors by using Netica software while analyzing factors causing fatigue. References | Related Articles | Metrics

A Research on Leveling Production Model and its Application Ding Ji-wu, Liu Hong-wei, Xu Dan 2015, 18 (1):  31-36.  Abstract ( 1790 )   Save The multi-species balance and scheduling complexity of auto leveling production is explored according to the principle of leveling production. In view of the background, a mixed production transforms model based on the characteristics of the time period is built to solve the scheduling problem of multi-species flow, combining with the proportion of production reciprocal method. The process of getting a satisfactory scheduling solution is given and the effectiveness of the model verified, reducing the complexity of the actual production scheduling. A welding workshop of F Car Company, composed of two main welding lines to supply an adjustment line, is taken as an example. In a certain period of time, according to the market demand and the company sales demand fluctuation, an appropriate production sequence was given. Through the optimization of the switching point between models, the dynamic demand of customers is fulfilled and the production system made more flexible. The results can be used by industry practitioners to improve production capacity and flexibility, assisting in achieving reasonable competitiveness. References | Related Articles | Metrics

A Study of Workload Distribution and COI-based Storage Policies Li Ming-kun, Zhang Yang-ping 2015, 18 (1):  37-41.  Abstract ( 3650 )   Save Optimal storage assignment policies are essential for warehouses. The COI-based storage policy concerns with picking productivity, and so products in small batches but with frequent orders would be stored close to the exit of the warehouse. However, the workload imbalance among different aisles reduces the picking productivity in warehouses. Therefore, two advanced COI-based storage policies are advocated, with the aim of reducing workload imbalance among aisles. The problem is formulated by integer programming models with new constraints introduced. The problem is analyzed with real data and results indicate that satisfactory solutions are obtained, as in similar traveling distance, the advanced COI-based storage policies are more effective to reduce workload imbalance. References | Related Articles | Metrics

Optimization Algorithm for Batch Planning with the Information of Billet Inventory Wu Ming-hong1,Zhang Feng-li2,Dong Guang-jing2，Wang Bai-lin2 2015, 18 (1):  42-47.  Abstract ( 1694 )   Save  A steel tube batch plan problem based on inventory information is studied. For the problem, a batch planning model is established with the objective of minimizing the billet shuffles. Combined with the feature of the problem, a twostage optimization algorithm based on the billet continuous shuffling is designed: first, determining the current optimal billet and searching the billets in the lower floor on the same stock to match the best continuous rolling billet; second, improving the first stage solution for searching the continuous rolling billets in each rolling location. Through experimental verification based on the actual production data, the billet shuffles decrease significantly relative to the classic heuristic algorithm. The model and algorithm are proved feasible and effective. References | Related Articles | Metrics

Lean Optimization of Engineer-to-Order Production Based onValue Stream Map/Analysis Zhu Yu-jie， Zheng Xian-yan 2015, 18 (1):  48-54.  Abstract ( 1803 )   Save  To implement lean production in an engineer-to-order enterprise, first, VSM/A is used to draw the current value stream map of the rotor production in a HT turbine factory, finding out the non-value-added time in the production. Secondly, by introducing lean production ideas such as Kan-ban pull system and balanced production and JIT logistics, the non-value-added time is reduced and a future value stream map is drawn. Finally, through the implementation of the program, the value-added time is reduced by 71 h, the non-value-added time shortened by 28 days, the distance reduced by 1 756 m, the value-added proportion increased by 4.48%, which proves that using the value stream mapping technology to optimize the lean production in an enginee-to-order enterprise has good practical value. References | Related Articles | Metrics

An Assembly Quality Improvement of Turbocharger Based on PDCA Plus Fishbone Diagram Analysis Chen Wen1,2, Zhang Li 2,3, Jiang Jian-jun 2 2015, 18 (1):  55-59.  Abstract ( 3616 )   Save In order to improve the turbocharger′s assembly quality of S company, an improvement is made on the traditional fishbone diagram, based on the concept of total quality management, in which two important factors, i.e. design and inspect, are added. The improved fishbone diagram method is then used to analyze the floating bearing leakage accident that happened in turbocharger assembly line of S company, and identify the causes and key reasons. During the whole process, the PDCA cycle management theory is utilized to formulate corresponding measures and consolidate the results. From early 2012 to the end of 2013, the leakage accidents have decreased from three to zero, which means that the quality target is reached. References | Related Articles | Metrics

A Quality Control Research on Bathroom Product Production Process Zhao Hui-zhen， Yang Ya-nan 2015, 18 (1):  60-63.  Abstract ( 1754 )   Save  In a bathroom product enterprise, low quality rate, high scrap cost and other quality problems often appear. In order to solve the problems, first quality management tools are used to statistic the factors affecting the product quality，then a measurement system analysis is conducted, with fishbone diagram method used to find key factors. With a factor analysis and hypothesis testing, a quality control and improvement scheme is designed. Finally, the improvement scheme is implemented. Result shows that scrap number decreases by 50%, saving about 200,000 Yuan RMB for the company, which indicates that the methods selected are reasonable and can provide guidance for practical application. References | Related Articles | Metrics

articles

Rebate Policy and Ordering Decision for Agricultural Product Supply Chain with Weather Risk Yang Lei，Ma Gui-mei，Zhang Zhi-yong 2015, 18 (1):  64-70.  Abstract ( 1808 )   Save In order to analyze the impact of weather risk on agricultural supply chain, a rebate model based on cobweb theory has been built first. And it involves three parameters like lead time, weather temperature and order quantity. This model effectively controls weather risk on agricultural supply chain. Then, by the method of risk measurement CVaR, optimal ordering strategy for wholesales is figured out. Finally, with a numerical example, it analyzes profit of supply chain members. It is shown that rebate model can play a role of profit transfer, and help to reduce the market price, increase market sales, even weaken agricultural product’ sales uncertainty. All these contribute to the profitability of agricultural supply chain. References | Related Articles | Metrics

Multi-objective Fresh Agricultural Product Distribution Path Optimization Based on Improved Genetic Algorithm Cao Qian1, Shao Jü-ping1, Sun Yan-an2 2015, 18 (1):  71-77.  Abstract ( 4972 )   Save To improve the efficiency of fresh agricultural product logistics distribution, a general three-layer fresh agricultural products distribution network is proposed, and a multi-objective mathematical model with the distribution cost minimum and customer satisfaction maximum established. Penalty function is introduced to deal with constraints and GA put forward to solve this question, according to the Pareto solution level and the level of congestion, sorting the same level of different individuals before choosing operation. Then the elite reserved strategy and maximum preserved crossover operation are used to obtain the Pareto optimal solutions. To verify the performance of algorithm, firstly, it is compared with the results of the standard genetic algorithm. At the same time, it sets different parameters and the result error is reduced. The results show that the established model and algorithm are effective and can provide guidance for practical application. References | Related Articles | Metrics

A Game Research of Retailers in Dual-channel Supply Chain Based on Improved Hotelling Model Considering Customers′ Channel Preferences Gu Ze-hao, Guo Zhi-fang, Wang Wen-li 2015, 18 (1):  77-83.  Abstract ( 2029 )   Save  In order to analyze the decisions of independent retailers which are in different channels, an improved Hotelling model based on considering customers′ channel psychological preferences is built. With cost difference in purchasing product in different channels and when different applicability of product in online channel, an analysis is made on different change trends between online retailer and offline retailer in Game equilibrium prices, market shares and profits. The result shows that, with the increase of the applicability of product in online channel, difference of Game equilibrium price and market share will decrease, and the profits of offline channel retailer will decrease too and meanwhile, the profits of online retailer will increase. When the applicability of product in online channel is fixed, product which has good applicability of product in online channel will be affected by the cost of purchasing product in different channels, and consequently, will bring different prices and market shares between online retailer and offline retailer. References | Related Articles | Metrics

Two-stage VMI Supply Chain Coordination with Stock-dependent Demand for Products Tian Li-ping, Sun Qun 2015, 18 (1):  84-89.  Abstract ( 1830 )   Save The coordination of one supplier and one retailer supply chain based on the product with stock-dependent demand under the environment of VMI（vendor managed inventory）mode is discussed in three steps. Firstly, a model of supply chain is established under centralized decision and the profit function of the whole supply chain worked out. Secondly, in the decentralized decision, the method of revenue sharing contract is used to coordinate the supply chain, according to the Stackelberg game. It is found that the method of revenue sharing contract cannot coordinate the supply chain. In the distribution of benefits, the retailer gain more benefits than supplier of the supply chain, and the total income of decentralized decision system is always lower than the centralized decision system. Finally, the method of Nash negotiation is used to coordinate Vendor Managed Inventory supply chain, with the profit of centralized decision-making achieved and Pareto improvement realized. Under the condition of stock-dependent demand, the conclusion is that the method of Nash negotiation can coordinate Vendor Managed Inventory supply chain and achieve the optimal profits. At last， the conclusion is verified by examples. Related Articles | Metrics

Strategy of Pricing and Coordination for Three-stage -Closed-loop Supply Chain with Differential Price Kong Zao-jie1, Li Wei2, Zhang Ya-ping3 2015, 18 (1):  90-95.  Abstract ( 1905 )   Save When the sales prices are different between the new product and the remanufactured product, a discussion is conducted aiming at pricing decision and coordination strategy of three-stage closed-loop supply chain built by the manufacturer, recycling maintenance center and retailer adopting game theory. By analyzing the pricing model under decentralized decision and joint decision, each member is given the optimal pricing strategy and profits. The joint decision can improve the profits of the whole system and bring benefit to consumers, but each member′s optimal profit is not sure. On this basis, each member’s cooperation system gains are coordinated and distributed by using improved K-S solution, implementing the tripartite win-win situation. At last, an example proves the conclusion. References | Related Articles | Metrics

A Research on Knowledge Services of Supply -Chain Members Based on Lean Thinking Yao Wei1， Zhang Zi hao2, Tong Zehua3 2015, 18 (1):  96-101.  Abstract ( 1752 )   Save Based on the perspective of Lean Thinking, using the method of literature analysis, and combing the research status of the knowledge services in supply chain members, the issues of the knowledge services in supply chain members are analyzed. In accordance with the corresponding problems, knowledge services processes, which can be summed up as demand representation, knowledge integration, knowledge fusion and externalization, knowledge services feedback, and lean thinking, are incorporated into the knowledge services in supply chain members. Then a lean model of the knowledge services in supply chain members is built, a “macro-chain-micro-ring” combination designed, and the corresponding implementation strategy put forward which includes the requirements definition, knowledge flow analysis, knowledge product value driving and service process optimization. References | Related Articles | Metrics

Profit Allocation in Collaborative Product Innovation Supply -Chain Enterprises Based on Improved Shapely Value Qi Xu-gao1， Lü Bo2， Fu Qiang1 2015, 18 (1):  102-109.  Abstract ( 1686 )   Save In view of the income distribution problem among collaborative product innovation members in the supply chain,an income distribution model of the modified Shapely value is esteablished. Considering the income distribution principles of the collaborative product innovation, based on the basic Shapely value, this model presented a method of determining the parameters, which involved input of the innovation resources contribution rate, risk sharing coefficient, product innovation execution rate and additional contribution rate. Through case analysis, the modified Shapely value could meet all the conditions to form the collaborative product innovation and better reflect the actual situation of the product innovation in the value creation in the supply References | Related Articles | Metrics

An Empirical Study of Influencing Factors of Product Quality Crisis Liu Shu-qing1, Ying Wei1, Cao Jun2 2015, 18 (1):  110-118.  Abstract ( 1656 )   Save In order to overcome the lack of systematic extraction of the influencing factors of product quality crisis, effectively enhance the prevention capacity of quality crisis, by using element analysis, the products quality crisis affecting factors were systematically finished by different scholars in different perspectives; based on the combining of element analysis results and category grid technology form the formal questionnaire of influencing factors; based on questionnaire and getting data, remove the factors with lower recognition level, use SPSS18.0 to conduct exploratory factor analysis, obtained 6 aspects,27 quality crisis influencing factors; identified 6 key affecting factors by using setvalued statistical method, provide a reference for enterprises to prevent and reduce quality crisis. References | Related Articles | Metrics

A Two-dimensional Performance Evaluation Model for- SMEs Based on Dominance Rough Set Theory Liao Yong, Chen Ye, Xu Hai-yan 2015, 18 (1):  119-127.  Abstract ( 1720 )   Save Aiming at the development characteristics of small and medium-sized enterprises (SMEs), a performance evaluation model in the dimension of management status and development potential for SMEs is put forward and the model is validated analytical with 171 SMEs data from gem. Taking into account the large number of businesses, a typical business sample selection policy relying on the cluster analysis method is presented, and then dominance rough set theory incorporated into the performance evaluation model to provide the decision rules generation for SMEs performance evaluation by expert knowledge learning. Thus, a two-dimensional performance evaluation model for SMEs is constructed. The evaluation results show that there are few SMEs with both excellent status quo and development potential. In addition, the relationship between the quality of rough set classification algorithm and the size of training samples is discussed. Results show that there is over fitting phenomena in learning classification of rough set, i.e., increasing the number of training samples is not necessarily able to improve the learning quality of classification. References | Related Articles | Metrics

A Comprehensive Performance Evaluation Based on- MACBETH Method and 2-Additive Choquet Integral Gao Zhe1， Miao Rui2 2015, 18 (1):  128-134.  Abstract ( 1715 )   Save Performance management poses daunting challenges to organizations in terms of meeting multi-dimensional goals. To assess the overall performance of the enterprise in multiple criteria and make efficient decisions, a three-dimensional performance evaluation system is constructed. The targets of value, risk and cost are divided into elementary parts by using Value Focused Thinking and each part is assessed quantitatively. MACBETH procedure allows to express commensurate elementary performances and the weights of criteria and then to aggregate the elementary performances. In order to take the criteria interactions into account, 2-additive Choquet Integral is added to MACBETH procedure in the aggregation process. The system, which considers the consistency of different criteria and reflects the global performances in comprehensive ranges, effectively helps the enterprise to make decision in multiple criteria. References | Related Articles | Metrics

A Study of Consumers′Online Shopping Decision: From Neuroscience Perspective Han Wei-wei, Wang Jing 2015, 18 (1):  135-141.  Abstract ( 1686 )   Save In consumer decision-making process, consumers evalute alternatives according to their expectation. This process has been regarded as a black box. In this study, 20 students participating in an online shopping experiment are recorded the brain activities. Event-related potentials (ERPs) are used to investigate consumers psychological process and neuromechanism in evlauation process. The results show that an essential component of ERPs, P300, is elicited in consumers evalutation process and distributed over almost all parietal and occipital regions. Products with expected attributes evoke higher amplitude of P300 than other products. P300 means that there is a similarity judgment when consumers evalute alternatives. Products in the stimulus evoke the knowledge and memory of specific products and activate the neurons in corresponding cortex areas. The higher similarity between the product and expectation is, the more likely for consumers to make purchase decision. Hence, the P300 may be a useful neural endogenous indicator of measuring consumers′ evaluation of products in marketing research. References | Related Articles | Metrics

practice & application

Research on Innovation Diffusion Behavior in-Cluster Innovation Network Based on Social Network Theory Li Xing1, Jian Zhen-qiang2 2015, 18 (1):  142-147.  Abstract ( 1647 )   Save An innovation diffusion model in cluster network is established from the perspective of social network theory, and the influence of the cluster innovation network structure on the diffusion of innovation behavior by using simulation technology. Research shows that the cluster network structure makes the diffusion efficiency of innovation information more higher, and the innovation diffusion process faster. At the same time, the social impact of cluster network has an important effect on the cluster innovation diffusion speed. When the sensitivity cluster subject to society is low, social effect will contribute to the diffusion of innovation information in the cluster network, and when the sensitivity cluster subject to society is relatively large, social effect will hinder the diffusion of innovative information in the cluster network. References | Related Articles | Metrics