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The key idea behind their scheme is that the AP allocates time slots to its clients, during which the clients may send data to or receive data from the AP.
In this article, we suppose that the stations which operate in non-HT transmit or receive the data frames in SISO mode and in non-HT PLCP Protocol Data Unit (PPDU) format.
,NSS NSD Number of data subcarriers NSP Number of pilot subcarriers NCBPS Number of coded bits per OFDM symbol NDBPS Number of data bits per OFDM symbol NES Number of BCC encoders for the DATA field NTBPS Total bits per subcarrier Energy efficiencies of a legacy data block transmitted in non-HT and HT.
Fig. 1 also shows that even if the data rate is low to 24 Mbps in MCS 24, the MAC efficiency of the stations is almost the same with those of stations in non-HT mode with 36 Mbps data rate.
Energy efficiencies of a large data block transmitted in non-HT and HT.

This paper deals with the influence of axial length and reinforcing rib on dynamic axially compressed aluminum polygonal tube in order to obtain the basic data of buckling and impact resistance.
There are a lot of interests in an aluminum tube as a frame timber having the function of high strength and weight reduction of automobile bodies [6].

So, if we combine the two methods using monitored data in the field, we can analyze slope stability clearly.
The parameters of reduced shear strength are calculated with Eq. (1) below: [5, 6] (1) Where RF is the reduction coefficient for shear strength, and are the effective cohesion and internal angle of friction, respectively, of the soil, and and are the effective cohesion and internal angle of friction, respectively, of the soil at failure.

An empirical model is developed by the analysis of variance (ANOVA) of experimental data.
Introduction Recently, there has been an increasing demand for micromachining due to the trend of miniaturization (reduction in size and weight) of technological devices for higher level of performance with minimum energy.

Should be noted that all the data used in this paper originate from the Beijing Statistical Yearbook of 2011 [2] and the China Energy Statistical Yearbook of 2011[4].
Analyzing the energy issue by the indictor of energy intensity can learn more information about energy consumption than by the absolute quantity indictor, which is also the core indicator of assessing energy saving and emission reduction used by China's government nowadays.
Secondly, according to the previous analysis, currently, Beijing has made certain achievements in energy saving and emission reduction, but it should make more efforts for energy conservation and improve energy efficiency in the next years.

It is well known that hot plume air recirculation and fan performance reduction will occur under windy conditions.
Fan performance reduction is also the research focus in the air-cooled condenser.
Meyer[6] simulated the flow field in the vicinity of an axial flow fan, and the comparison of the numerical results with experimental data indicates the accuracy of the fan model in its prediction of the axial fan performance characteristics.

When the elevated temperature was raised to 400°C, the reduction in compressive strength of Control concrete was 8.5 MPa, and the reductions of NC series specimen were only about 1-2 MPa, the experimental result revealed that adding nano-clay into concrete could significantly maintain compressive strength of concrete after high temperature exposure.
A positive relationship between strength and UPV is observed and linear regression curve was used to correlate the experiment datas.
A linear regression curve was used to correlate the experiment datas.

The model was obtained based on input/output data collected from real-time experiment using system identification method.
Test 1 - Reduction of grain moisture content (17% to 14%).
Fig. 11 Comparative study - Reduction of grain moisture content using PID and QFT-based controller.

OFDM system model We consider an OFDM system that consists of N sub-carriers, each sub-carrier consists of data symbol X[k], where k represents the sub-carrier index.
There have been some useful threshold values for the use of noise reduction.
In order to compensate for disadvantage of conventional DFT-based channel estimation and to maximize the noise reduction effect at all sub-carriers, we consider Mahalanobis distance discriminant analysis estimation algorithm.

Third, the initial stage in the promotion of eco-building, the introduction of high-tech talent to resolve accounts, children's education and other personnel work, reduction of corporate income tax, and so policies to support the development of ecological building.In short, the state has extensive construction management industry by the former, as a high-tech industry to deal with.
The Assessment Criteria Need to Change .First, the data needs to be updated national scale, enterprise scale needs to be updated, the costs of ecological construction should have some improvement than traditional construction, in the current transitional phase, it is much easier to add eco-building standards.
Based on ecological construction development concept, investors should intensify policy, financing way, technology and research &development efforts, choose materials and techniques accord with national financial subsidies, which can make the cost reduction.