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Feature selection has become the focus of research areas of applications with high dimensional data.
Introduction Rapid technological developments in Computer Science have resulted in increasing quantities of data, making many of the classical data analysis tools unavailable.
NMF[3] is a good method for dimensionality reduction which has been used in many fields,such as text mining, face recognition, microarray data analysis and so on.It is always considered to be an unsupervised learning algorithms for feature extraction.This paper is to use it for feature selection not for feature extraction.
In this paper,we propose a new feature selection algorithm adopting a two-step strategy for high-dimensional data .The first step is to use improved NMF to compress the great number of data samples to several groups of vectors which can be regarded as the basis of each category in the dataset.
Since relatively few basis vectors are used to represent a lot of data vectors, good approximation can only be achieved if the basis vectors find out latent structure in the data.

Advanced data assimilation method is used for the short-term wind power forecasting based on a meso-scale model.
Data assimilation (DA) is an essential component of all NWP systems.
Data Assimilation System.
The observation pre-processing modular (OBSPROC) of WRF-Var is implemented for data sorting, quality control and observational error assignment.
Kuo, “Four-Dimensional Variational Data Assimilation for WRF: Formulation and Preliminary Results.”

This paper summarizes and arranges the data of such experiments on composite walls with openings.
Japanese and North American standards both gave the equation of reduction ratio considering openings based on the test data, but the formula is not accurate and needs further study.
This paper summarizes and arranges the data of such experiments of composite walls with openings.
After that, Fei Liu[7] used amended sheathing area ratio as argument, and defined dependent variable parameters, which were peak strength reduction ratio and elastic stiffness reduction ratio , the expression of which were as follows: (6) (7) Calculating equation of reduction ratio for composite wall with openings At First, the paper summarizes the data of such experiments of composite walls with openings, then collects the minimum reduction ratio of the same sheathing area ratio, and gets Table 1.
Conclusions Based on an overview of existing experimental research on shear behaviors of cold-formed thin-walled steel composite walls with openings, This paper summarizes the experimental data on shear capacity of the composite walls with openings, and further analysis with SPSS (Statistical Product and Service Solutions) software was carried out to make a regression analysis and get an equation of reduction ratio considering the effect of openings on the shear capacity.

The ion induced-reduction eliminates the need for high temperatures typically required for the reduction processes.
The XPS spectra of the as-grown sample is characterized by a doublet with the W 4f7/2 component at a binding energy (BE) of 35.6 eV and an energy separation between the W 4f7/2 and W 4f5/2 peaks of 2.2 eV, which agrees well with the data for pure WO3 (W6+ ionic state of tungsten) from the literature [31], [36], [37].
Closed circles represent experimental data and solid lines the fitting doublets of mixed G-L functions.
These results align qualitatively with previous data obtained from WO₃ samples bombarded with Ar+ ions [36], [37].
Closed circles represent experimental data and solid lines the product of mixed G-L functions.

The test proved the drag reduction effect of soft dolphin skin.
Each test data is average values after test three times. 3.1 NACA4412 Airfoil The drag reduction rate, lift increase rate and lift-drag ratio change rate of airfoil are calculated by the following formulae: （1） （2） （3） Fig.8 is the relation of inflow velocity and drag for NACA4412 airfoil, and Fig.9 is the relation of inflow velocity and drag reduction rate for NACA4412 airfoil with bionic soft surface.
Turbulent drag reduction using soft surface[J].
Test Research on Drag Reduction of Soft Wall [J].
Test on Drag Reduction of Soft Surface and Research of Drag Reduction Mechanism.

Fig. 1(b) shows the effect of different chloride concentration on NB reduction by SM-NZVI.
Fig. 1(d) shows the effect nitrate on NB reduction with SM-NZVI.
The data showed a limited effect on NB reduction was acquired at different NO3- dosage, and the effect did not trend to be expanded significantly during the reaction.
Fig. 2(b) shows the effect of Ca2+ on NB reduction.
It means that the enhancement of NB reduction is due to Cl- but not Ca2+.

Weight reduction is a priority across the automotive industry for improved fuel efficiency and CO2 reduction, and crash safety is the first design criterion considered during vehicle development.
Recent research shows that every 10% vehicle weight reduction can yield 5-8% greater fuel economy, while reducing 100 kg of vehicle weight can lead to CO2 reduction up to 12.5 g/km [1].
Material Substitution for Weight Reduction.
For steel, , , gives reasonable agreement with the experimental data by Symonds[5].
Table 2 Weight reduction of front rail in designs with various AHSS Design No.

Hence, the reduction ratio of gear reducer is required to be higher and higher. 3K type and 2K-2H type planetary gear trains can be designed to have high reduction ratios.
This paper proposes 2K type planetarygear train with high reduction ratio.
(a) Reduction ratio Rr=40 (b) Reduction ratio Rr=50 (c) Reduction ratio Rr=100 Fig.4. 2K type planetary gear reducers with simple planet gears The Gear Data for 2K type Planetary Simple Gear Reducer In follows, the 2K typeplanetary simple gear reducer shown in Fig. 4(a) will be the example to illustrate how to design the two ring gears with different shift coefficient to engage the same planet gear.
Table 1 show the gear data of 2K type planetary simple gear reducer shown in Fig.4(a).
Table 1, Gear data of planetary simple gear reducer shown in Fig. 4(a) Planet gear 3 Ring gear 4 Ring gear 5 Teeth No. 16 38 40 Normal Module (mm) 2.0 2.0 2.0 Shift coefficient (mm) 0.2 0.58 -0.18 Pitch Dia.

The technologies bring with the building a reduction 6.5 kt CO2 each year.
The sustainable design of the building would have a reduction of about 6 kt CO2 annually.
It means that the solar PV of China pavilion contributes GHG reduction of 552 t CO2e.
The CO2 reduction attributable to the green measures would amount to 6.5 kt CO2 annually.
The authors would like to thank the Bureau of Shanghai World Expo Coordination and Shanghai Academy of Environmental Sciences for providing related data of the 2010 Expo Shanghai China as well as those anonymous reviewers of their helpful comments.

Review of the Application of Water Pinch Technology in Water-saving and Emission Reduction Lihong Meng1, a, Qi Qiao1 and Jingyang Liu1 1 Chinese Research Academy of Environmental Sciences, Beijing 100012, China ayuduanhongri@163.com Keywords: water pinch, water-saving, emission reduction Abstract.
And its application on the water saving emission reduction of other industries is less.
Taking a petrochemical enterprise for example, through applications of software on analysis of water data of the maximum impurity concentration of system exports, optimized system with conventional analysis and system with water networks optimal design software, we could see that use of water pinch technology optimization saved water by 48.7% than original design 14.6% than conventional optimization technology.
Zhu Shenhua[18] compared the system water data of regular analysis optimization and water pinch technology optimization with that of original design, and found that water-saving rate of routine analysis optimization and water-pinch technology optimization were 17.62% and 31.03%, respectively.
Based on experience or data analysis solution as well as the parameter mentioned above, the water network is designed which may have deviation with regeneration concentration in actual operation.