摘要: Fusing three-dimensional virtual scene and video image into a perfect whole, is a key technology in augmented reality, which includes a number of problems need to be resolved. This paper makes some researches on the occlusion and consistent illumination between virtual and real objects. About occlusion, an approach for realizing multilayer occlusion is presented. A special scene graph tree is designed comprised of some special nodes, namely EMO nodes. According to the location of real moving object, different EMO node will be activated in real-time, consequently realizing the multilayer occlusion. About consistent illumination, two spheres with Lambert surface are introduced in the real scene. Through image analysis and analytical geometry of three dimensions, the illumination parameters of the real scene are estimated automatically. These parameters describe a point light source and ambient light. Using the estimated illumination parameters, the synthetic scene is relighted through inserting proper virtual light sources in the scene graph tree. This work explores a post-illumination-processing and image-based approach to rapidly improve illumination consistency in augmented reality.
摘要: Urban logistic capability is an importation area of urban competition capability. The competitiveness index system of city logistics service outsourcing was constructed in this paper. According the actual situation of 4 cities in China's Yangtze River delta, the competitiveness evaluation of logistics service outsourcing of them were carried out based on TOPSIS method. Furthermore, by comparing we can discover the experience and main existing problems of urban logistics service outsourcing, so as for the feasible countermeasures of development to provide the scientific basis. The evaluation method has certain practical value.
摘要: Traditional Chinese Medicine have the secret is dosage,the Traditional Chinese Medical clinical therapeutic effect key is prescription’ dosage. A majority of Chinese medicinal herbs are generally crude plants with fairly moderate nature and a relative wide-safety range of dosage,their doses may not be used so strictly as those of chemicals, but must within the limitation. The Traditional Chinese Medical dosage is yet affected by the follwing factors:properties of medicinal herbs,compatibility and formulation,the condition of illness,the patients’ physique and age,methods of decocting chinese medicinal herbs,methods of taking chinese medicinal,and etc. After exclude these factors, analyze the relationship between TCM prescription’ dosage and pharmacodynamic effect be of great signifiance.In this work, explore how to analyze the relationship between TCM prescription’ dosage and pharmacodynamic effect is a major goal. The paper put forward analyze the relationship between TCM prescription’ dosage and pharmacodynamic effect based on Uniform Design and regression method, It was proved to be feasible and effective after tested.
摘要: This document builds up the inventory control model of fresh agricultural products based on the expected loss of inventory costs (purchase costs, storage costs, shortage costs and the loss of cost with perishable characteristic of fresh agricultural products). The optimal order quantity is obtained through derivation of the model function. Finally, the numerical example has proved this method to be effective.
摘要: In the study of vegetable price forecast, as the price is subject to various uncertain factors (weather, supply and demand, etc.), it has attributes such as high nonlinear, randomness and high noise, which would lead to the difficulty in forecasting. But grasping the law of price development and understanding the development trend of price, would help farmers grow the vegetable reasonably, and reduce unbalanced supply and demand. Therefore, we will make use of the characteristics of neural networks such as self-adapt，self-study and high fault tolerance, to build up the model of BP neural network with the training function of L-M for forecasting the vegetable prices. Finally, numerical example proves that the method is effective.
摘要: The purpose of this paper is to construct a multi-objective optimization model for cooperative pricing in the management of apparel supply chain. Firstly, by using Apparel Popularity Index (API) model, a kind of pricing model for supply chain has been built. Then, by introducing cooperation and other constraint conditions, a kind of cooperative pricing model was constructed. This model is a kind of Stackelberg game. The manufacturer and the retailer obtained their excess profits through the game. Lastly, this paper gave a numerical example which demonstrated that the excess profit of the cooperative supply chain was constant, and when the constraint conditions changed, the excess profit space would change at the meantime. This research result can help partners on apparel supply chain to practice Quick Response strategy.
摘要: This paper analyzes the bag-making process and control requirements of paper and yarn compounding bag-making machine (PYCBMM). The overall control scheme is established. Configuration software WinCC Flexible 2008, Siemens touch panel MP377, Siemens PLC S7-200, Siemens frequency converter MM440, rotary encoder, color sensor, and other elements are synthetically applied to design the PYCBMM control system. During 12 months commissioning operation, the control system is stable, reliable, and easy to operate. All the technical indices outperform the design requirements.
摘要: Focusing on the technical objects, the relation of technical objects is analyzed on the basis of the product data concept model and the integrated product model by Schöttner. Taking for coding as a tie, the relations among the parts, the documents, the drafts and the models are explained as well as the revised coding solutions. Taking diesel engine enterprise as an example, the deficiencies are pointed out based on the data model status, and the corresponding improved suggestions are proposed. The relations model of technical objects is applied for the enterprise. The application indicates that the model realizes the reusing of existing resources, improves the efficiency of enterprise personnel. It is the guide of implementation for information in future.
摘要: The high speed machining technology of complex surface has been a focus of the study. Based on the analysis of cutting force model for ball-end cutters and cutting force tests of 3-axis machining, the paper brings forward the reasonable oblique angle of tool axis for complex surface with different curvature. According to the different feature of surface shape, the surface is classified in terms of oblique angle formed by tool axis and normal vector of surface. Meanwhile, the processing methods are proposed to adapt to classification of surface. Adopting 3+2 axis method in 5 axis machine to processing complex surface with different features by sub-regional process will effectively improve the surface quality and extend tool life. The paper finally put forward the high speed supplementary processing technology to process the boundary and transition area of surface.