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In the situation of high-speed or heavy load, pneumatic cylinders usually generate cushion failure like collision or rebound, so that the key question to be solved for the cylinders is cushion. In order to obtain a better cushion method, the paper used the ideal cushion characteristic curve of hydraulic cylinders for reference; and throttling area equation, temperature equation, flow rate equation and motion equation were established. By building the simulation module in Matlab/Simulink, the rule of throttling area approaching to the ideal cushion curve was found, which provide theoretical basis for the design of cylinders cushion devices.

In the analysis of semiconductor position sensitive detector (PSD) based on the traditional structure, using dual ion implantation method to studying the new type of PSD structure. The new structure of the n-type silicon substrate by implanting a high dose, low energy boron ions and another high energy boron ion, Which subsequent annealing of 2h at 1050 °C in an ambient of dry O2to form a shallow and a low doped p-n junction. Experimental results show that the new structure of PSD can obtained high position resolution, smaller errors and nonlinear response time.

A rigid-elastic coupling multi-body dynamic model of an in-wheel motor vehicle with double pivot suspension was established. The steering effort performance is analyzed. Results showed an excessive steering force of the vehicle with double pivot suspension. By optimizing the suspension parameters using response surface surrogate model and genetic algorithm, the characteristic of steering effort was improved.

A multi-body dynamic rigid-flexible coupling model of an in-wheel motor vehicle is built. This vehicle is based on a particular class-A car. An overall investigation of the influence of unsprung mass on vehicle ride comfort is conducted. With the increment of unsprung mass, overall vehicle ride comfort is decreased. The degradation of wheel dynamic load performance is most obvious. Suspension parameters are optimized based on the multi-body dynamic model of the vehicle and Response Surface Method. The suspension deflection and wheel dynamic load of the vehicle using optimized suspension parameters are improved significantly, while the body vertical acceleration increased slightly.

A double pivot suspension used for in-wheel motor electric vehicle was designed, and the virtual prototype model of the suspension assembly was build. The suspension parameters changed greatly during steering. In order to solve this problem, this paper proposed a non-linear response surface model to fit the relationship of suspension parameters and design variables. An optimization scheme was designed based on the response surface model. The suspension performance was improved significantly using optimized variables.

Different dimensional siliciferous particles including silica (0D), halloysite nanotubes (HNTs,1D) and montmorillonite (MMT,2D) were melt blending with certain amount of melamine cyanurate and polyamide 6(PA6) by a twin-screw extruder. Characterization of the PA6 composites has been investigated using scan electron microscopy (SEM), thermal gravimetric analyzer (TGA), universal testing machine and limiting oxygen index instrument. SEM images indicate that the nanoparticles were uniformly dispersed in the PA6 but there was some aggregation of MCA in the composites. The incorporation of silica exerted a negative effect on the flame retardancy of PA6/MCA composite, whereas adding HNTs and MMT lead to the improvements of LOI value of 30.4 and 30.9 respectively. TGA results show that PA6/MCA/silica, PA6/MCA/HNTs and PA6/MCA/OMMT exhibit two degradation stages. Higher Tmax1 and Tmax2 appeared comparing with PA6/MCA. Char residue of PA6/MCA/OMMT at 600°C were elevated most. HNTs and OMMT can increase the tensile strength and elongation of PA6/MCA by universal testing machine results, even higher than pure PA6, showing enhanced effects of these 1D and 2D fillers. These could enhance strength of the char and finally increase the flame retardancy of PA6.

A rigid-elastic coupling multi-body dynamic model of a car was established. The controllability and stability including constant cornering, steering returnability and steering effort performances are analyzed. Results show that there is still a feasibility to enhance the understeer. By optimizing the suspension parameters using DOE method, the characteristic of understeer was improved. Simulation analysis indicated that the characteristics of steering effort and steering returnability were not affected due to change of suspension parameters.

Based on development of Chinese LDPE composites preparation engineering, this paper especially aims to analyze various modification methods on physical property improvements of LDPE/CaCO3 polymers. Most widely and advanced used methods of mixing technology research status and characteristics are reviewed and discussed. By studying inductive LDPE/CaCO3 composites effect, we are able to analyze composite conditions such as parameter value that are positive to reactions and briefly probe the challenges facing kinds of composite materials in the future.

[Objective] to study the modeling technique of Vitamin C dripping pill and its quality evaluation. [Method] the preparation conditions were optimized by orthogonal experiments using encapsulation efficiency (EE) as the target index. The matrix type (PEG 4000:PEG 6000), ratio of drug to matrix, dripping temperature and dripping distance with three levels were chosen in the orthogonal experiments. Weight variation, dispersion limit, content and stability of the dripping pill under the optimum conditions were estimated. [Results] The optimum conditions were obtained when matrix type (PEG 4000: PEG 6000), ratio of drug to matrix, dripping temperature and dripping distance were 6:1, 1:7, 80 °C and 20 cm respectively. The weight variation and dispersion limit of the dripping pill ranged in -13.47-13.38% and 4.5-5.0min. An assay method was developed by UV spectrophotometry. Its quality was stable during the three months of accelerated test. [Conclusion] the weight variation and dispersion limit of the dripping pill with good morphology and high stability came up to the requirements of Ch. P, the assay method was simple and accurate, demonstrating that the dripping pill can be used as edible or pharmaceutical dosage form.

Nowadays, the users’ evaluation of sound environment in the railway stations is focused by all kinds of experts. Comparing with other spaces, the waiting hall is usually recognized as the most important space in the railway station. In this study, more than 600 questionnaire survey has been undertaken at 4 waiting halls of railway stations in capital cities of China, to determine how the sound sources and sound pressure level influence acoustic evaluation. More details of acoustic evaluation in the waiting hall of Harbin railway station are given in this paper. Based on the analysis of the investigation results, it has been found that in the waiting halls of railway stations, PA system is generally noticeable and ‘masking’ other less preferred sound sources, while sound from mobiles is preferred by passengers. The relationship between the measured LAeq and the subjective loudness, acoustic comfort evaluation as well as subjective loudness and acoustic comfort are all of a linear shape, and the acoustic comfort is general better when LAeq is lower than 75dBA.

In this paper, strong Moire-fringe density and direction are studied in noisy phase maps using a preprocessing method of automatic Moire–fringe analysis. This information can be used to improve the performance of 2-D phase unwrapping methods, to construct phase-jump-preserving filtering strategies, and also to perform robust segmentation of phase data. The method is highly insensitive to noise, is model based and perforros the studies in the Fourier domain.

A novel flowrate sensor based on a couple of fiber Bragg gratings( FBGs) has been proposed, consisting of fiber grating pressure sensing setup and Venturi tube. The expression of relationship between the flowrate and the wavelength shift difference of the FBGs is derived. The pressure that two sides of the cross section of the aluminum foil tube in the pressure sensing setup results in the distortion of an isosceles triangle cantilever structure. The distortion results in the wavelength shift of a couple of FBGs that are mounted at either side of the cantilever. By monitoring the wavelength shift difference of the two FBGs, the flowrate can be obtained. The cross-sensitive problem of the FBGs sensor can be solved by compensating the temperature effect. The preliminary experiments have been carried out, and the results verify the feasibility of the proposed sensor with a measurement range from 8 to 200 mm/s.

PC1D software, which was developed by the University of New South Wales, has been used to simulate photovoltaic properties of crystalline semiconductor devices. The paper focuses on the simulation of silicon solar cell by PC1D. The simulation of silicon solar cell is carried out by setting up key parameters, which include device area, thickness, band gap, etc. Several important characteristics of silicon solar cells are obtained by simulation.

This paper, innovative approaches are based on laser scanning and image analysis, presents an efficient composite technique for object profile extraction with real-time image processing. High throughput is obtained by algorithmic prefiltering to restrict the image area, while high accuracy is achieved by neural recontruction of the profile.

Paper has been removed due to double publication.