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Introduction Double sides loaded gears are widely used in vehicle, engineering machine and common speed reduction machines.
The gear bending fatigue property is the basic data to predict bending fatigue life of gear.
(8) The mean stress of middle gear is zero, but the mean stress cycle of gear specimen tested to get the fatigue property is σFmax/2.So mean stress of middle gear should be modified before the gear fatigue property data is used.

Fig. 1 (a)Sketch map and (b)section plane of FGM Fig. 2 XRD pattern of FGM: (a) 80% Al2O3 + 20%Sialon, (b) 20%Al2O3 + 80%Sialon, (c) 70%Si3N4 + 30%Sialon Fig.3 SEM morphology of FGM (a) 80%Al2O3 + 20%Sialon, (b) 20%Al2O3 + 80%Sialon, (c) 70%Si3N4 + 30%Sialon β-sialon powder, using as transient interlayer, was prepared by sol-gel reduction-nitridation processing with alumi-iso-propoxide, SiO2 and carbon powder as starting materials.
The detailed data have been reported in ours previous work [5].
These data show that the FGM layers have a very similar thermal expansion properties.

Design Of Experiment（DOE） DOE is a method that how experimental data is obtained and how to deal or analyze experimental data and results scientifically[5-6].
Under the higher holding pressure, the plastic parts can get greater density, shrinkage reduction, improved surface quality and reduce the chance of shrinkage of plastic parts.

Fig. 1 presents powder X-ray diffraction pattern, which analysis has shown the presence of three phases reflexes: crystal cubic β (Al(Cu,Fe)), icosahedral quasicrystal ψ and monoclinic crystal λ (Al13Fe4), which d values correspond to data presented in [5].
Stress and strain were determined by the computer program that converts data from two sensors: optical - measuring the strain and potentiometric sensor, which measured the deformation of a properly calibrated spring, through which the force acted.
On the topogram in Fig. 3b2 three areas may be distinguished: I of highest contrast, II, in which areas of significant contrast reduction (white and light areas) occur, and III, in which weak contrast bands occur, better visible after computer processing.

Tests for significant difference in water quality between influent and effluent of the wetland were determined by paired t-tests [5] for each set of data.
Reductions of TSS concentrations in constructed wetlands were consistently observed, resulting in removal efficiencies ranging from 84.8% to 86.2%.
Rousseau et al. reported pollutant removal efficiencies of SSF constructed wetlands by examining the influent-effluent data from 12 wetland systems treating domestic wastewater in Flanders, Belgium, averaging 75% for TSS [6].

At least three parallel samples were used in all analytical determinations, and data are presented as the mean of three replicates.
Ratio of urea-to-fish oil higher than 0.80:1 did not cause further increase in the content of DHA and EPA (data not shown).
The results showed a large reduction in ethyl esters of saturated and monounsaturated fatty acids and a remarkable increase in n-3 PUFA ethyl esters.

The test data were collected by IMC data acquisition modules.
As compared to the first-floor isolation without MSD, the compound isolation system achieved significant displacement reductions over almost the entire range of earthquake characteristics considered.

. , k, the ith path to reach the receiver delay is,signal attenuation factor to reach the receiver is , then the multipath fading signals is as Eq.3: (3) Spread spectrum communication system using correlation integral filter, during the integration of 0 T (pulse width of data), is a constant ,, is the autocorrelation function of spread spectrum sequence, then Eq.5 is as shown in Eq.4 : (4) By Eq.4, which can be seen that the demodulation output signals of multipath fading signal is associated with the properties of the autocorrelation of spread spectrum sequence.
Usually,, therefore, which indicates the spread spectrum communication can resist multipath fading. 2) When, that is when the multipath interference is inside the chips, , through the integral filter, by Eq.1, we can obtain that the decline signal of receiver meet: (6) Eq.6 dedicate that multipath fading and demodulation output of direct signalare of the same sign, the useful data, , at this time, the multipath fading has enhanced the useful signal, is regarded as part of the useful signal, have an effect on the useful signal amplitude, but do not broaden or compress the pseudo-code width. 2 The Results of Simulation and Analysis The BPSK modulation signal under multipath Rayleigh channel, in the presence of additive white Gaussian noise, the performance of spread spectrum communication system is simulated in this section, using MATLAB/Simulink under Rayleigh fading channel
In this situation the reduction of will cause the BER performance decline.

Processing of Experimental Data.
Using Grubbs rules to get rid of the unexpected data because some improper operations occurred in the experiment [7].
At about 150°C, the flexural strength under boiling water and cold water has a significant reduction.

Introduction With domestic and foreign major and serious accidents data continues soaring, finding quantifiable factors affecting major accident serious level nowadays has become an urgent problem to be solved.
Neural network-specific issues and data handling complex nonlinear generalization capabilities allow complex relationships between factors simplistic [6].
severe mild …… U3 U6 U5 U4 U1 1 2 3 4 5 6 3 2 1 1 2 3 14 15 normal U2 Fig.1 BP network structure Fig.2 Change in the training error In this paper, we collected 344 groups of traffic accident data, 300 groups of data are used in BP neural network training, 44 groups are used to test the network.
This shows that the training sample is representative, can reflect the overall characteristics of the original data set, the model can be applied according to the determined weight matrix and bias vector.
Collected data has been preliminarily analyzed, the results are shown in Figure 3.