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The natural frequency and damping coefficient of it are obtained and compared with that of the semi-metallic brake pads, the excellent performance of the new composite brake pads is verified and it provides a new way for the noise reduction. 1.
Therefore, ANSYS modal analysis results are consistent with the theoretical ones. 3.Modal test 3.1 Test principle Modal testing system is mainly made of three parts: the excitation system, the signal pickup system, and data acquisition and processing system, which is shown as Fig.8.
Finally, modal identification is conducted on the measured data and the first 10 modes of each group of signals are identified. 3.3 Results and discussion 1) Comparative analysis of the natural frequency The first 9 natural frequencies of different materials are obtained, which are shown in tab.5.
However, the damping coefficient of the new composite material is much larger than that of the semi-metallic material, which proves that the new composite material is in better noise and vibration reduction performance. 4.
Given the above, compared with the semi-metallic material, the new composite material is in better noise and vibration reduction performance.

Forty evaluation indexes are storage and mining ratio, transport capacity, impact factor of change suddenly, fluctuation rate of price, SO reduction rate and so on.
demand ratio Energy supply and demand ratio Supply and demand ratio Supply and demand ratio Growth rate of consumption Storage and mining ratio Stocks Storage time Balance degree of regional supply and demand Energy self-sufficiency rate Resource rating Dependence degree of import Growth rate of Per capita electricity consumption Growth rate of energy consumption Balance degree of regional supply and demand Balance degree of supply and demand Transportation Transport capacity Safe degree of import transport Grid transmission capacity Safe degree of energy transport The affect of change suddenly Impact factor of change suddenly Impact factor of change suddenly Impact factor of negative charge Impact factor of energy change suddenly Economic security Fluctuation rate of price Fluctuation rate of price Fluctuation rate of price Elastic coefficient of energy consumption Foreign exchange reserve Technology energy-saving rate Growth rate of renewable energy Ecological environment SO reduction
rate SO reduction rate SO reduction rate Environmental carrying capacity CO emission growth rate CO emission growth rate The degree of environmental pollution Conclusion The evaluation of energy security is a comprehensive, complex and multidisciplinary problem, so, it is a vast project to structure the evaluation index system of energy security.
This process will need not only a large number of fundamental data, but also model prediction and system simulation to process the data, so that the accuracy and authority of the system will be ensured, this is also the next step we will work mainly.

The theoretical and experimental investigations show that the improvement of the combustion process by use the bioethanol at the supercharged spark ignition engine leads to the reduction of BSFC (with 5% at the stoichiometric dosage), to the accentuated reduction CO and HC (with 5% and 13% respectively at the same dosage), due to a lower C content and better combustion properties of the bioethanol.
Experimental investigations The experimental investigations were carried on an automotive supercharged SI engine with the 1.5 L displacement mounted on a test bench which was equipped with the next instruments equipments: AVL ALPHA 160 eddy current dynamometer (with throttle actuator), a real time AVL data acquisition system, AVL in-cylinder pressure transducer line, AVL gas analyzer, Khrone Optimass mass flow meter, air flow meter, thermo resistances for engine cooling liquid temperature, engine oil and air intake temperatures and thermocouples for exhaust gas temperature, manometer for air pressure from engine intake manifold.
Regarding the NOX emissions a reduction of 60 %, respectively 85% comparative to gasoline engine is assured at stoichiometric dosage and becomes more significant for reach dosages because of the local cooling effect produced by bioethanol vaporization.
Conclusions From analyse of the theoretical and experimental investigations results can be formulated the following conclusions: At the bioethanol use the engine efficiency and power/torque increase; At the gasoline - bioethanol blends use for supercharge engine the reduction of CO and HC emissions are significant due to much better combustion properties of bioethanol; At the gasoline - bioethanol blends use at supercharged engine the reduction of NOX is more important in the area of l>1.1 dosages were the strategy of engine load qualitative adjustment can be applied; Bioethanol can be defined as an efficient agent for knock avoiding Aknowledgements The authors would like to address special thanks to the AVL GMBH Graz Austria for providing the necessary equipments.
Heywood, Direct Injection Bioethanol Boosted Gasoline Engines: Biofuel Leveraging For Cost Effective Reduction of Oil Dependence and CO2 Emissions, Massachusetts Institute of Technology, MA 02139, Cambridge, April 20, (2005)

The primary structure is assumed to be linear on account of substantial reduction of seismic forces due to the installation of SDBs for which a bilinear hysteretic model is considered.
The primary structure is assumed to be linear on account of the reduction in seismic forces due to the SDBs.
Using the first set of data for and Eq.(11), we define the partial measure-of-fit as (14) The values of and are obtained by simultaneously solving , (15) Similarly, application of the second data set for and Eq.(12) produces another partial measure-of-fit as (16) extremization of Eq.(17) with respect to the unknowns yields , , (17) from which the values of , and are obtained.
Moreover, parameters identified from different set of data are somewhat different.
The acceleration responses contaminated with an artificial white noise signal of 5% noise-to-signal ratio are considered in the system identification analysis to simulate the measured data in a more realistic manner.

Data Collection Terminal.
Database server is responsible for saving data and relevant information.
Data acceptance software adopts C/S structure and is mainly responsible for inspecting and inputting the data uploaded from the field into the database.
Imaging Display of Monitoring Information and Data.
Geological disasters in high slope usually are accompanied with the reduction of rock-soil body’s strength.

It has developed rapidly in the 1990s and become the important data mining methods [2].
In recent years, new methods have come out of data mining, such as SVM etc., however, Rough Sets has an irreplaceable position as it can reach the classification rule without a priori.
P could have more than one reduction.
[3] Xiongfei Li,Jun Li.Data Mining and Knowledge Discovery [M].
A Novel Feature Reduction Algorithm Based on Core Feature Dependence [J].

Experiment 1 14.5 mm pin 30 degrees angle Experiment 2 14.5 mm pin 45 degree angle Experiment 3 14.5 mm pin 60 degrees angle Experiment 4 14.5 mm pin 90 degree angle Experiment 5 55 mm pin 30 degrees angle Experiment 6 55 mm pin 45 degree angle Experiment 7 55 mm pin 60 degrees angle Experiment 8 55 mm pin 90 degree angle The data taken from each experiment have been: · the maximum, minimum and average tensile stress, · the maximum, minimum and average deformations, · the % of reduction in thickness.
Data shown in Table 2 will be constant for all simulations. 14.5 mm and 55 mm pin diameters have been used.
A table with all relevant data is shown below.
Input data for the Deform-2D experiments.
Simulation data: Table 3.

In addition, in real parameter estimation problem of the model, data are often corrupted by noise which should be taken into account [3].
In this study, the percentage noise ratio is designed to perform optimization for different level noise, and the noise ration () is given by (9) where represents the component of noise-free data at th time point, represents the experimental data including additive noise, is the number of data points, andrepresents the average value of experimental data .
When we add a certain degree noise (=30%) into test data, as revealed in Fig.2, the simulation results by using the proposed approach are still satisfactory, whose RMSE is below 0.3.
The simulation data is in a close agreement with the test data, even through the simulated data are corrupted by different degree of additional noise.
In addition, this approach is applied to estimate parameter of the experimental data with a certain level artificial noise.

In the present study, composites LiFe(PO4)(1-x/3)Fx/C (x=0.00,0.02,0.04,0.06,0.08,0.10) were synthesized by carbothermal reduction method.
In this paper, LiFe(PO4)(1-x/3)Fx/C composites were synthesized by carbothermal reduction method in which formation of conductive carbon and fluorine doping were achieved simultaneously, which greatly improved electrochemical performances of the LiFePO4 materials.
The peak positions were compared with JCPDS data for LiFePO4 (JCPDS file No. 83-2092).
The results show that all obtained XRD patterns are in good agreement with standard data for LiFePO4 with an ordered olivine structure indexed by orthorhombic Pnmb.
Fig.4 The cycle properties of LiFe(PO4)(1-x/3)Fx/C composites in the former 50 cycles at 0.2C Conclusions In this study, we synthesized composites LiFe(PO4)(1-x/3)Fx/C (x=0.00,0.02,0.04,0.06,0.08,0.10) by carbothermal reduction method.

Their UV-Vis absorption and fluorescence spectroscopy data were studied.
The FT-IR data were obtained from AVATAR36-based Fourier transform infrared spectrometer.
The MS data were obtained with MAT95XP-based high-resolution mass spectrometer.
The data can make the electrode materials and luminescent materials and carrier transport materials between the sub-band matching, which can provides an idea theoretical basis for optimizing the device structure and improving device efficiency.
Table 1 data indicated that 5a-5f have relatively high electron affinity and ionic potential.