Search results

In tone reservation-based OFDM systems, the peak to average power ratio (PAPR) reduction performance mainly depends on the selection of peak reduction tone (PRT) set.
In tone reservation-based OFDM systems, the PAPR reduction performance by TR method mainly depends on the selection of peak reduction tone (PRT) set.
OFDM System and Tone Reservation Technique The discrete-time OFDM signal can be expressed in matrix form (1) Where X is the data vector and Q is the IDFT matrix.
Tellado, ``Peak to average power reduction for multicarrier Modulation,'' Ph.D. dissertation, Stanford Univ., 2000
Cioffi, ``Peak power reduction for multicarrier transmission,''Information Systems Laboratory, Stanford University, 1999

Changchun, 130051, China 3Aviation University of Air Force, Changchun, 130022, China aliuxiaolun_jldx@163.com, b450268973@qq.com Keywords: bush roller chains, meshing impact, split roller, noise reduction Abstract.
By analysis of testing data, noise level of duplex sleeve chains with split rollers compared with that of the other duplex bush roller chains was reduced by the average 3 ~ 8dB, and low 10 ~ 13dB than that of 16A simplex sleeve roller chains.
The chains made chain drive significantly improve in the working environment, with steady transmission, strong bearing, low noise, and a significant noise reduction was achieved.
It had been concluded that contact process of sprocket tooth and non-metallic elastic material roller was noise reduction process [7,8].
Reduction of Noise and Vibration in Roller Chain Drives.

Laterite Steel Sample Measurement Reduction Initial Thickness (To) Initial Length (Lo) as cast 6 200 30% 8.6 139.54 40% 10 120 50% 12 100 60% 15 80 Result and Discussion According to the test result data, increment of hardness is directly proportional to the number of reduction level.
Initial hardness before rolling process 190.93 BHN, within 30% of reduction was resulting 247.63 BHN, 40% of reduction was resulting 248.33 BHN, 50% reduction was resulting 280.03 BHN, greater number of reduction means more harder material.
However, it decreased at 60% of reduction.
Identifying and fracture morphology of the sample as cast and with variations A0 size reduction; A1; A3; A4 with SEM and EDS instruments capable of analyzing the quantity of data elements that are formed in certain areas Fig. 7.
Based on the discussion obtained optimum reduction in the 50% reduction that is in the sample A3.

Magnetic Damping in Turning of Stainless Steel AISI 304 for the Reduction of Machining Vibration and Tool Wear A.K.M.
The data was subsequently processed using DasyLab (version 6) software.
Fig. 3 compares the corresponding tool flank wear reduction by 11% for the same run.
The greatest reduction in tool wear (89.62%) is in run 13 for a corresponding reduction in vibration of 51.27%.
This led to a reduction in tool wear by 63.85% on average.

To optimize the reduction technology of SSI and its removal ability for nitrate from wastewater, the influence of reduction temperature of SSI on nitrate removal was investigated.
But the higher specific area was also impacted by deoxidizer, reduction temperature and reduction time, etc.
When the temperature was T1, the reduction temperature was too low to accelerate nucleating of metal iron with the iron oxides reduction.
lnr=ln(-dC/dt)=lnkobs+nlnC (5) According to the kinetic experiment datum shown in Fig. 1, reaction rate equations of nitrate removal by SSI reduced under different temperature could be calculated and illustrated in Table 1.
SSI reduction could not be optimized merely on the basement of its removal ability of nitrate, other factors should be taken into account, such as reduction atmosphere, temperature, reduction time, etc.

The last step provides the sources of the variation of the measurement data.
One is a Fourier basis for periodic data while the other is a B-spline basis for non-periodic data.
Fig.2 HFE Standardized Test Data Scatter Diagram .
Silverman: Functional Data Analysis (Springer , New York, U.S.A 2006), pp.84-85
Vieu: Computational Statistics & Data Analysis, Vol. 51 (2007) No.10, pp. 4788-4792

An Adiabatic Register Based on Dual Threshold Leakage Reduction Technique Jianping Hu1, a , Xiaoying Yu1, b , and Xiaolei Sheng1, c 1 Faculty of Information Science and Technology, Ningbo University, Ningbo City, China a nbhjp@yahoo.com.cn, b nbuxiaoy@yahoo.com.cn, cnbuxiaolei@yahoo.com.cn Keywords: Nanometer CMOS circuits, Dual threshold CMOS, Leakage reduction, Adiabatic logic.
The two-phase CPAL register file consists of a storage-cell array, address decoders, read/write word-line drivers, sense amplifiers, and write bit-line and read data-line drivers, as shown in Fig. 3 [4].
The write bit-line and read data-line drivers are as much as the number of memory columns.
Because about 70% of memory store data are "0" [5], the storage cell with double-threshold technique can reduce leakage in the inactive state.
Summary This paper focuses on leakage reduction of the register file based on CPAL circuits using DTCMOS schemes.

Therefore, optimizing transportation form of the road transport, strengthening energy conservation management, is of great practical significance to improve the efficiency of energy utilization, to protect environment, to facilitate the sustainable development of society.This article combined with the relationship between drop-and-pull transport and energy saving and emission reduction, used the analytic hierarchy process and fuzzy comprehensive evaluation model to evaluate the effectiveness of energy saving and emission reduction of drop-and-pull transport.
Energy saving and emission reduction of road transport industry refers to improving the fuel efficiency of the operation vehicle and reducing fuel consumption and waste emissions.
Analysis of energy saving and emission reduction mechanism of drop-and-pull transport Direct energy conservation mechanism.
Energy saving benefits evaluation of pull transportation case A case study of XX company, combines with its volume forecast the next few years, and transportation equipment situation, calculates the quantitative evaluation indexes, experts scores on the basis of the data obtained and the specific circumstances of the qualitative evaluation indexes, final draw weight set W and membership matrix R.
It follows that there is a certain energy saving effect in pull transport, but still need to further strengthen the energy-saving and emission reduction management, to achieve better energy saving effect.

The WO3 is a stable oxide because the reduction agent used to promote the reduction was not sufficient enough to reduce to zero metal tungsten.
The reduction divided into three stages: the reduction of WO3 to WO2, reduction of WO2 to W and then significant methane decomposition.
For identification purposes of crystalline phase composition, diffraction pattern obtained were matched with standard diffraction data (JCPDS) files.
Results & Discussion Thermodynamic Consideration Data.
The reduction should be preceded by formation of WO2.96 as the earliest reduction of WO3 [3].

China a gma@wust.edu.cn, bjybcooker@163.com, cdabingyang@sohu.com Keywords: Fly ash; carbothermal reduction; Si-Al-Fe alloy Abstract.
Table 1 Chemical composition of raw materials (%) Materials TFe SiO2 Al2O3 CaO MgO S P K2O Na2O TiO2 C LOI* Fly ash 7.26 30.20 14.16 2.64 0.83 0.57 0.05 0.87 0.55 1.71 29.02 36.21 Bauxite 0.64 5.25 74.21 0.25 0.29 - - 0.08 0.02 4.38 - 14.46 Hematite 45.77 19.16 6.65 3.70 0.76 0.07 0.93 - - - - - Coke - 5.65 3.62 1.26 0.14 0.11 0.08 - 0.39 0.16 86.27 - *-Loss on ignition Sample preparation and carbothermal reduction process In the calculation of the proportion of raw materials stage, the element distribution ratios among the slag, metal and gases phase adopt the data from Jiang et al. [4].
This is consistent with the results of thermodynamic calculation of alumina reduction with carbon by Wang et al. [5], which reported that the carbothermal reduction of bauxite to produce Si-Al-Fe alloy can be divided into four stages, i.e.
Fig. 2 shows that the products of carbothermal reduction of pellets.
Thus, the production of Si-Al-Fe alloy by carbothermal reduction method, it should avoid it exposure to air.