Microstructures of natural materials are the origin to inspire new mechanical structures. The laser scanning confocal microscope （LSCM） was used to examine the microstructures of undercoat villus of duck，tomentum of rice，vascular bundle of pine needle and rices lateral root; and scanning electron microscope （SEM） were used to analyze the microstructures of epidermis cells of cucumber， the cactus skin， the rice vein， cactus tissue， quails eggshell， rices root and shells， and the features of microstructures of natural materials were summarized with consideration of results of former researchers. The typical features of the microstructures are fractal， hierarchical， multiscale， porous， graded and integrated structures. Moreover， application of above features in bionic structure design was discussed. Furthermore，the general characteristics of the microstructures of natural materials were discussed in terms of symmetry and selfsimilarity interconnections．

electing an appropriate logistics provider will help manufacturers to reduce operating costs and improve competitive advantage. Efficient TPL activity has played an important role in improving enterprise core competitiveness and reducing manufacturing cost. In view of the disadvantages of traditional entropy and entropy calculation formulas， an improved entropy formula was put forward. Meanwhile， through combining experts subjective weight with entropy weight generated by sample， we used multi-attribute weights as uncertain attribute weight in certain way. Then， multi-attribute decisionmaking evaluation method was established combined with multi-attribute decisionmaking model based on this. This method has certain advantages in the aspect of combining subjective and objective: it has not only reduced the subjectivity of the decision problems， but also made the whole process to be quantified evaluation. Besides， it has also solved the uncertain multi-attribute decision problems effectively. Finally， data analysis was given to prove that this method was feasible and efficacious．

An improved multi-objective group search optimizer （IMGSO） was presented for multi-objective optimum design. The algorithm was based on the multi-objective group search optimization （MGSO） and combined with Pareto optimal solutions theory. The improvement included three aspects. Firstly， the concept of transitionfeasible region was introduced to handle the constrained conditions. Secondly， Dealers principle was employed to build the non-dominated set. At last， in order to avoid getting into the local optimum untimely and improve the solution precision， the selection of the producer was achieved based on the combination of Tabu search algorithm and crowded mechanism. The IMGSO algorithm was compared with the MGSO by two numerical examples of the design of planar and spatial truss structures with discrete variables. The results show that the solution of the MGSO algorithm is mostly dominated by the IMGSO， and the IMGSO algorithm gets preferable convergence accuracy and obvious advantages for complex problems especially for highdimensional ones，meanwhile convergence rate is improved to some extent. The proposed IMGSO can be used more effectively for multiobjective practical structural optimal design problems．

The fatigue analysis and structure optimization for suspension stabilizer link bracket is carried out in order to solve its fracture during conventional vehicle durability test. The FEA model of the stabilizer link bracket was established by the ANSYS software. Based on the static finiteelement fatigue analysis method, the strength analysis was accomplished and the fatigue life was predicted. In accordance with equal strength beam theory, the structure of the stabilizer link bracket was optimized. The correctness of fatigue simulation analysis was verified by fatigue rigtest and crack fracture analysis. The test results show that the fatigue life of the optimized structure fulfils the quality requirements．

To improve the rationality and adaptability of spatial arrangement for transmission shaft，design optimization should be carried out with the characteristics of the suspensions space motion.Based on the dynamic conditions when the vehicle with leaf springs was actually travelling， kinematics analysis of the vehicles leaf springs was conducted. A transmission shaft motion model based on suspension space motion model was established， optimization goal of dynamic space of transmission shaft was presented，the linear weighting method was used to transform the multiobjective optimization into single objective optimization and small population genetic algorithm was selected to be the optimization algorithm. A transmission layout scheme with smaller average of equivalent angle was gained through example calculation， vibration and noise were effectively reduced. The results indicate that the transmission shaft space dynamic design based on leaf spring motion is more reasonable than the traditional single load optimization design，and has higher optimization efficiency and the adaptability of optimization results is better．

In view of the topology optimization design method on vibration and noise reduction of damping material structure and based on evolutionary topology ESO （evolutionary structural optimization） algorithm， the optimal layout of damping material was sought. Elements deleting method and calculation method of modal loss factor sensitivity were obtained. Topological optimization process for the circular saw was built. Modal loss factor sensitivity was used as a standard to weigh the contribution of elements to modal loss factor. Ineffective damping elements were deleted by judging the effect on vibration and noise resistance. The optimal structure of laminated damping circular saw under the condition of stiffness was obtained， which reduced the vibration and noise and reached a certain stiffness requirement at the same time. By contrast the damping loss factor of three kinds of circular saws， the vibration and noise reduction effect of optimized circular saw structure is validated．

Automatic assembly problem is very important for design and analysis of travel mechanism， nonroadwheel tracked vehicle travel mechanism is taken as the research object， the key issues for posture positioning and constraints adding in automatic assembly are mainly analyzed. A automatic assembly method of tracked vehicle travel mechanism based on method using auxiliary sketches and reference surface for posture positioning and constraints adding was proposed， and a travel mechanism automated assembly systems was developed， which can greatly improve the efficiency of the parametric prototype modeling and make the designers free from the tedious work of routine modeling and assembly.

The volume efficiency of water hydraulic axial piston pump is directly influenced by the clearance size between piston and cylinder port. Because of the outstanding elastoplasticity and airtightness of the engineering plastic PEEK， a new sealing scheme of automatic clearance compensation was proposed， which will be used for piston and cylinder port. On condition that different annular slots under the pressure of cyclical change， the corresponding deformations of piston sleeve were analyzed through the ANSYS simulation software. The results show that this structure can effectively reduce the stress amplitude of the materials， as well as the leakage between the piston and cylinder port， improve the service life of the piston．

With banding together the gray theory， the artificial neural network and genetic algorithm on the basis of optimal weights coefficient， we got a combination algorithm. We built three combination models according to three kinds of mathematical methods， which were the combination model of arithmetic mean， the combination model of quadratic sum average and the combination model of proportion average， meanwhile， the models were applied to metal milling burr forecasting of carbon steel 45. We analyzed and calculated the results of the forecasting models by using the three evaluation indexes of prediction error: sum of squared error mean， absolute error mean， relative error. The consequences show that the combination model of arithmetic mean is more consistent with the experimental data， and it has a higher accuracy and stability， which is pretty valuable for metal milling burr forecasting．

Current design model of the full decoration house has many defects. It does not fundamentally meet customers needs and leave the customers individual demands unsatisfied. Moreover， due to the urge promotion of the full decoration house， the full decoration design model has become the emphasis of research. This paper introduced building information modeling （BIM） and discussed how to apply BIM to customize design of the full decoration house. With the powerful capabilities of BIM in design coordination and 3D visualization， a customer can get a 3D model with customized decoration information， which facilitated later procurement and construction processes. This paper also demonstrated the feasibility of customizing the full decoration design through a case study．

To achieve high control performance of nonlinear variedload system， through the method of integrated with PDF （pseudo differential feedback） controller model, PMSM motor drive and controller model based on MATLAB， as well as the implementation drive mechanism and load entity threedimensional in ADAMS environment， the paper established the control system design and performance simulation model based on PDF control strategy and variable load characteristics， and realized variableload object control system integration design and system integration of heterogeneous model simulation. Based on the platform of the system， a PDF controller was designed and control performance was analyzed by simulation. Comparing with the results of control simulation based on the traditional PID control algorithm， the final result shows that the PDF control algorithm has more advantages over the PID algorithm in the control accuracy， antiinterference ability， robustness and convenient characteristics under the variedload object on the certain degree．

Aming at the problem of contradiction between sensor installation structure and small size of the pressure gauge in the pressure test of gun chamber, a shell capacitive pressure sensor is designed.The structure and basic principles of the pressure sensor were introduced.The transient and static analysis were respectively made on shell of pressure gauge using the finite element analysis software ANSYS.Shell capacitance was fitted by the least squares method of the static analysis results， the correlation coefficient was 0.997 5. The static sensitivity curve of capacitive pressure gauge was drawn out.Dynamic experiments were done on the simulation chamber pressure generator.The chamber pressure curve was analyzed by calibration of the rising edge.The result shows that the gauge has a good nonlinear characteristics.Static sensitivity increases with the increased pressure load.So the design of the case is feasible and worthy of promotion．

A color detection device based on TCS230 is developed for the robot obstacle avoidance. Infrared sensor or color sensor are always used as color detection means， but it can not be achieved in a multicolor distinguish scenes. Using TCS230 as a probe， different color information can be converted into a corresponding frequency signal of different impulse. The 89C51 controller would distinguish the object color by the program after acquiring the frequency signal. It can be applied to the multicolor distinguish scenes. This device cant get the exact color information in a dynamic environment because of the bad influence causing by the boundary position and vibration. Time delay detection and parallel realtime measuring method was used to avoid the color misjudge when the device was moving across the boundary position. Dual sensor structure with T type shape and the mean filter method in the software reduces the wrong result for the vibration. The device was applied to the intelligent assembly robot for obstacle avoidance and achieved good results. This color detection device can be applied to industrial product color detection and other related areas．

To improve the bandwidth of bandpass filter， a new arrowheadshaped electromagnetic band gap （EBG） ultrawideband bandpass filter based on substrate integrated waveguide （SIW） was proposed. The filter was designed based on the bandstop characteristics of EBG and had obtained ultrawideband by etching different dimensional arrowhead on the surface of substrate integrated waveguide. The ultrawideband bandpass filter with a center frequency at 985 GHz and relative fractional bandwidth 3959% showed good bandpass characteristics， while the insertion loss was less than 154 dB. Compared with similar bandpass filter， the return loss of the filter in the passband is better than others with much smaller circuit size. The good agreement between the measured results and the simulation results demonstrates that the design of this proposed filter is effective．

The two-dimensional geotechnical centrifugal shaker is the most effective test equipment in researches for geotechnical earthquake engineering， and the swing arm is the key component， which supports suspended baskets, shaking table, test model and trim block etc， and drives them rotate to achieve centrifugal test acceleration. The conventional geotechnical centrifuge^'s swing arm structure cannot meet the two-dimensional vibration test conditions. In order to make the two-dimensional geotechnical centrifugal shaker operate stably under different working conditions such as conventional soil tests, one-dimensional vibration tests and two-dimensional vibration tests， the swing arm was designed as welded frame structure which had I-beams. Aiming at the qualifications of a certain two-dimensional geotechnical centrifugal shaker， the swing arm was optimum designed while its structure layout and operating principle had been introduced. The results of mechanical analysis show that the welded frame structure is reasonable because it meets all of the two-dimensional geotechnical centrifugal shakers test condition requirements.

For the current situation of difficulty in dismantling heavy wheel and the complexity of existing dismounting machine， a pendulum rod removable device for heavy wheel was designed. The structural concept and working principle were introduced; the method of geometric analysis was used to determine the four limiting locations of the wheel center; kinematics simulation of the device was taken in Pro/Engineer software， the track area of wheel center was achieved， and the respective impact of the pendulum rod length and two sidebracket on the track area were analyzed， also， the ratio of left-right span to up-down span of the track area were defined when the adjustment range of device was optimal. It is indicated that device has many characteristics through on-site applications， such as high rate for centering， convenient to dismounting， stability， safe and reliable， and easy for vehicle carrying and field using．

In order to solve the question of slow speed Ethernet transmission in traditional embedded equipment, an implement method based on FPGA and W5100 was designed. The NiosⅡprocessor which was created by SOPC technology was used to control hardware TCP/IP protocol W5100 to realize Ethernet transmission, and C2H was used to do hardware accelerator for crucial C code. This system transmits data reliably and has much faster transmission speed than traditional methods, realizing high-speed Ethernet transmission.