Taking the transport system and the urban sustainable development as the targets of research, a novel analytic hierarchy process(AHP) algorithm to evaluate the adaptability of the transport system to the urban sustainable development was proposed. On the basis of analyzing the weak points of the traditional AHP method, sixty factors from the social, economical, ecological and transport domains were selected to form a evaluation index system. The singular value decomposition(SVD) method was used to improve the weighting factor calculation of the matrix with acceptable consistency. For the matrix with unacceptable consistency, the far and near degree was used to identify the coordinates of the significant elements and make its mean amendment of the direct mutual oppsition. A simulation work was performed for Shandong province, and the results indicated that the adaptability of the transport system to the urban development is decaying, providing a warning for the decisionmaking of the administrative officials.

N-type lead telluride compounds (PbTe) doped with Bi₂Te₃were prepared under 3 GPa and 1200 K by HPHT technology. The electrical resistivity, Seebeck coefficient and thermal conductivity of PbTe doped with Bi₂Te₃ were studied at room temperature. Results show that the figure-of-merit,Z, increases dramatically first, then decreases slowly with the increase in Bi₂Te_3, and the maximum value of Z is 9.3×10-4 K^-1 when mole fraction of PbTe is 1×10^-4 . This value is about 20% higher than that prepared at ambient pressure.

The dynamic model which describes the torsional vibration behaviors of gear system was introduced accurately in this paper. The differential equation of gear system nonlinear dynamics exhibiting combined nonlinearity influence such as timevarying stiffness, tooth backlash and dynamic transmission error (DTE) was proposed. The theory of multiple scales method was used to solve nonlinear differential equations of gear systems and the frequency response equation was obtained. The fact that the approximate analytical solution by using the method of multiple scales is in good agreement with the exact solutions by numerically integrating differential equations and it proved that the method of multiple scales is one of the most frequently used methods in solving differential equations, especially for large and complicated differential equations.

The aero-thin-walled components are characterized by the thinness and its variability of the wall and low rigidity, they are liable to distortion during the machining process, so it is difficult to guarantee their machining precision. In view of the fact, to predict and control effectively their machining distortion, calculations of the milling distortion were performed for the aerothinwalled components by the 3-D finite element method considering the milling forces, the clamping forces and the initial residual stress field, and the behaviors of the milling distortion were revealed. The predicted distortion behavior was verified by the milling test and the positive result was obtained. The study is helpful to the prediction and the control of the machining distortion for the thin-walled components.

Patankar model has been used on Cu-Zn alloy surface to fabricate bionic coupling structure by means of laser photograph technology. Hydrophilic capacity has been improved 62% or the apparent contact angle decarse from 82.5°to 31.5°. The results show that the relationship between unit character parameter and apparent contact angle does not keep the same step with Wenzel or CassisBaxter model. Distortion exist on linear regress model. Nonlinear math′s model characterizes the relation between unit character parameter and apparent contact angle.

In order to improve the reliability and intelligence of the excavator, a fault diagnosis approach of its hydraulic system based on an auto-regressive with extra inputs (ARX) model and the fuzzy C-means (FCM) clustering was proposed. This approach does fault diagnosis by two steps: fault feature extraction and fault classification. In the first step, the ARX models are established for known faults and unknown faults. The auto-regressive parameters extracted from the model are regarded as the fault feature. In the second step, the FCM clustering is used as the fault feature classifier to identify unknown faults. Both the simulation and experiment results showed that the proposed fault diagnosis approach can be effectively applied to the excavator hydraulic system.