According to the features of green product design, house of quality (HoQ) of green product was established. Based on the traditional QFD, environmental requirements was added to the proposed method.Moreover, the triangular roof of HoQ was modified. The methods of obtaining environmental requirements and calculating the weight of environmental requirements were put forward. Customer requirements, environmental requirements and cost were taken into account during the process of green product design. The objective function and constraints of product optimization was set up based on HoQ. The proposed method was validated through performing a case study of hair dryers.

A latest technology applied to heavy equipment field—Bumpy-ridge technology was introduced. Application of Bumpy-ridge technology can solve many hard problems, such as manufacture and transportation, and can dramatically save cost. Therefore, Bumpy-ridge technology has a wide prospect in future industry. Basic concept of this technology was introduced firstly. Then some latest research advancement on its basic concept was presented by use of several interdisciplinary branches of science, including weak-bonding theory, fracture mechanics and tribology etc. Finally, its applications to engineering projects were introduced with combination of the prospect of its further research and application．

Metal-plastic compound material has a wide application prospect and composition admeasurements of working layer are one of the key aspects of research on it. An optimal method for composition admeasurements of working layer based on adaptive neuro-fuzzy inference and genetic algorithm by taking firmness and vibration reduction as the objective was presented. The results show that the optimal volume ratios of working layer were: PA66 516%, PPS 38.6%, carbon fiber 9.8%. Comparing to the metal-plastic compound material made by common method, the one with the optimal composition admeasurements achieves a 9%—15% vibration reduction and a 8%—16% increase in impact force bearing on condition that no failure happens. The comprehensive properties of metal-plastic compound materials are greatly improved．

With the economic development, the product is greatly abundant. However, the similarity of product is also increased. Product form innovation design can effectively enhance product quality, so the method of product shape retrieval and automatic evolvement of product shape design is urgently needed, in which shape descriptor is one of the key technologies. A new method to describe product shape based on polar coordinates and Fourier operator is presented, which includes the following 4 steps. The first step is to pre-process, which can obtain form contour information from product image. The second step is to abstract shape signal, which uses a function to express product form information. The third step is to standardize the signal, which can standardize the sampling point number and the size of different product forms. The fourth step is to do Fourier transform, which can convert the shape signal to the frequency domain to express product form by harmonics operators. The experiment indicates that a certain number of harmonics are sufficient to represent the main shape feature of product shape, which means that the presented method is robust, compact and simple. 

Advancing the research on rapid prototyping machining tool based on the hardware and software platform of open architecture CNC system which had GT400 series motion controllers and its key technology for ceramic parts, had great significance on shortening the manufacture period of ceramic parts and enhancing enterprises production efficiency. The technical process of the new rapid prototyping method, the basic constitutions of the machine tools about rapid prototyping manufacturing for ceramic parts and the design of hardware and software were introduced in detail. The control requirements of the mechanical system about the new rapid prototyping method for ceramic parts were analysed comprehensively. The design of software adopted the topdown way. Visual C++6.0, as a software development tool, was used. The developed ceramic rapid prototyping manufacturing control system based on GT series motion controllers with builtin dynamic link library DLL possessed features of convenient operation, stable running, high-precision processing. The control system which satisfies the requirements of open systems and requirements of product automatic production well, impoves economic efficiency. 

To study the walking gait period of an assistant leg, the method using virtual dynamics software to simulate walking process was proposed. With combination of human body structure and gait planning, research on the work principle and the function implementation of an assistant leg was carried out. Design of the mechanical structure of an assistant leg was made and its 3D model combining with its corresponding human body model was established and ADAMS was used to simulate its walking gait. The result proves that the assistant leg meets the requirements of human walking, and it is technically feasible. The proposed method provides reference for physical prototype machine and is of great significance for research on control algorithm for an assistant leg.

Pressure control system is one of the most essential and important systems for an aerostat, the engineering design of which may directly relate to its security and capability. The basic pressure control requirement of an aero-boat, as a typical instance of aerostat, was derived according to the stress analysis of envelope material and the requirements of aerodynamic shape-keeping. The construction of the pressure control system and the engineering design of its main parameters were discussed. The regulation capability of the system and its influence on the whole aerostats capability were analyzed from the aspects of regulating-speed and regulating-range. The relationship curve between ballonet-scale and flying-height was provided, which clearly showed the minimum vol. limit of the aerostat according to the designed flyingheight. Moreover, the typical control method of pressure control system was introduced, which was proved effective by autonomous flight experiments of a middle altitude verifying airship. The engineering research on pressure control system of aerostat focuses on its practicality,and is valuable in engineering design.

To design and optimize an optimal tilt angle, solar radiation, annual optimal tilt angle and seasonal optimal tilt angles of the PV module were calculated through the solar radiation model by Matlab. The seasonal tilt angles of the PV module were optimized after redividing the season span to make the solar radiation of the PV model maximum. According to the local condition of Hangzhou, daily solar radiation at different tilt angles was calculated and analyzed. A large number of experiments conducted by TRM-FD1 type of PV power testing system proved the feasibility of the proposed method. The experiments show that, the PV model at seasonal angle can enhance solar radiation by 11.5% and 4.1% compared to that at level and annual tilt respectively. For the solar radiation of level PV model, the calculated results agree with the measured data well, and the relative error is less than 5%, which is accurate enough for solar energy engineering design and research. Validation result indicates that this model is reasonable and applicable．

In order to explore the directional fracture reliability of a composite seal cover, the models of equivalent strength, failure criteria and the 3D finite element were established. The laws of fuze impact stress during the process of fracture damage under fuze backward impact force, changes of seal layer strain energy with seal layer thickness, and the reliability of seal cover due to the interlocking function under the adjacent firedgas streams positive impact with support layer thickness variation were analyzed. The results show that: 1)To meet the requirements of topological self-locking closures fracture orientation, ensure the security and reliability of fuze body, the smaller the seal layer thickness, the better; 2）At the impact of fired-gas streams, with the support layer thickness decreasing, sub-structure support layer closures largest contact stress will be greatly increased and the reliability of self-locking topology may be lowered．

Experimental and numerical research on the stiffness of polyester dust cap subjected to axial compression was carried out, and the calculating analysis of deformation and strength of the such polyester dust cap under actual work condition was investigated. First, the stretch tests of polyester samples were carried out according to the test methods required by the corresponding national standard, from which the coefficients for Mooney Rivlin equation were achieved; then the finite element models of the standard test samples and dust cap were established, and the nonlinear finite element software MSCMarc was used to calculate the their stiffness. The results of the calculation and the experiment are consistent, which demonstrates the correctness of this finite element model. Finally, the deformation and strength distribution under actual work condition were analyzed. The proposed method is a significant reference for the design and the development of dust cap．

The coupling theory of dynamics and elastohydrodynamic lubrication is applied to strength analysis of WN (Wildhaber-Novikov) gear. Based on vibration theory and load capacity of oil film analysis and numerical solution method, combined with WN gear pair meshing theory, a new coupling analysis model of WN gear transmission lubrication and vibration dynamics is established.A spring and damping model of WN gear pair are utilized to describe the force generated by bending of the contact tooth, and the change of the number of meshing positions as well as its effect on stiffness was taken into consideration. The strength analysis in meshing under coupled multiple factors is carried out. The calculation analysis and experimental results of instance accord with each other well. This method provides application reference for transmission and optimization design of construction strength of WN gears．

Research on a Fourier analysis of highpower non-bridge LED drive circuit in the illumination use, introduced by the authors, is carried out. Under the given circuit condition, the content of its frequency spectrum and harmonic was analyzed and calculated. The result shows that there almost exists no harmonic in the frequency range below the lowest working frequency of the circuit. THD, the content of the total harmonic of the circuit input current, rises with increase of the minimum input current pulse width T₀(min) and lowers with the increase of the effective value ratio of circuit output direct voltage and input alternating voltage U^_o/U_i. It indicates that a filter circuit is needed at the input port of the circuit and its filtering effect was analyzed. The design method of the filter circuit is also provided．

Detailed analysis of the mechanism model of proton exchange membrane fuel cell (PEMFC) is carried out. On this basis, the simulation tool of Simulink in Matlab was adopted to establish a dynamic model of the PEMFC stack. Through the established dynamic simulation model, the effect of the main operating parameters on the dynamic output performance was analyzed. When current step change occurred, dynamic responses of output voltage, output power, consumed power, stack equivalent resistance and the efficiency of PEMFC stack were simulated. The simulation results are consistent with the data in available literatures. All this indicates that the stack model is correct, workable and effective. The research makes contribution to realtime analysis and dynamic optimization of PEMFC stack and provides help to promote the practical application of PEMFC．

In pursuit of the protection and development method of the minority cultural heritage, the application of reverse engineering to cultural heritage protection was described in detailed from the aspects of entity measurement, 3D CAD model, surface evaluation system. The representative minority cultural relic—pottery relic of Buyi minority and the two wooden masks is taken as the research object. Firstly, Hiscanner laser scan detector was adapted for data collection, and then obtain point cloud data which could be recorded on disc for permanent saving was obtianed；Furthermore, the new popular reverse engineering software Geomagic for some disposals of point cloud data was adopted in data condensing, data mending, data filtering, feature line picking up to obtain NURBS surfaces; and then the error between the reconstructed CAD model and the point cloud data was evaluated to guarantee the precision of surface reconstruction to keep the relics keep its original appearance. In the end, the NURBS surfaces are imported to 3D software Solidworks and entities of CAD are generated by surface sewing,mold loft and ablating and other instructions. Cultural relics copy or dies was obtained via rapid prototyping manufacturing. Application of reverse engineering technology to cultural heritage protection was realized. The application of this technology can further promote the development of protecting methods and provide reference for similar subjects．

To optimize the LX131 6×2 type truck frame, part of the locations and number of beams needs to be adjusted. According to the force-bearing characteristics, by using finite element simulation, the low stress area of the truck frame under bending work condition was obtained. The beam required adjustment was moved to the above-mentioned area and meantime one beam of the truck frame was removed. Comparing with the original truck frame, the stress on the adjusted truck frame does not increase. The following static and dynamic stress test and actual usage show that the modified frame is reliable and the purpose of reducing cost is achieved．

In order to seek the optimal structure shape of bicycle frame, its topology optimization design was carried out. The present research situation and mathematical model of topology optimization were introduced firstly. Then topology optimization design to bicycle frame by finite element analysis software ANSYS 11.0 was carried out. Finally the optimal structure shape of bicycle frame, that is two triangles, is obtained and then improving method of the present bicycle frame is proposed．