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To practically implement PON, intensity modulation and direct detection is a very promising solution, because it provides the cost reductions in system complexity, installation and maintenance.
In the upstream direction, all ONUs share a signal wavelength channel and send their own data via feeder fiber by means of TDM technology.

In fact, linearity and power efficiency are both crucial factors in the design of communication transmitters because of the fact that they permit signal integrity upholding, base-station deployment, operating cost reduction and an increase in battery life for mobile stations. [1] Since future wireless transmitters need to meet various modulation formats, signal bandwidths, and frequency bands, there seems to appear a strong demand for high efficiency, wideband and multi-standard power amplifiers (PAs).
The datasheets of transistors provided by manufacturers generally recommended these data which could achieve the desired effect.

Petri-nets model of urban railway transit hubs The flow charts of transfer procedure in the hubs could be deduced by the analysis and the optimization of passenger flow lines and the reduction of the conflicts of the flow lines.
The required real data for the simulation model are not described because of the limit of pages.

The effect of cooling of air due to droplet evaporation is the reduction of compression work which is almost proportional to the volume of working fluid [2-5].
Results and Discussions The basic data for present work are as follows; T0 = 15oC, P0 = 1 atm, RH0 = 60%, Rp = 15, ηc = 85%, RP = 15, and f1 = 5%.

Figure 6 shows data points of the carrier lifetimes obtained from the selected devices with different values of holding current.
In summary, we identified the impact of substrate material properties on the characteristics of 4H-SiC thyristors and demonstrated that an optimized thicker anode design resulted in a reduction of both the mean value (from 0.7 to 0.1A) and the standard deviation (from 0.4 to 0.03A) of the holding current.

Overview of FPGA Broadband Power Amplifier Digital Pre-distortion Theory In the broadband power amplifier module, FPGA is mainly used to complete the real-time processing of base band input signal, and realize the parallel data processing, including ADC and DAC control communication, DSP control communication and signal modulation real-time compensation and so on [3, 4].
It needs to set a threshold value, when the signal exceeds the threshold value; it needs to enter a reduction peak at this position, as shown in Figure 5.

(1) in the construction project management in the application of value engineering for construction enterprises to improve project profitability, real fine management we used in some technical methods of construction project management, limitations, such as the traditional management only focus on cost reduction, quality management is emphasized to improve the quality of.
(1) the function evaluation Value engineering group according to the history data statistics, project decomposition, the real cost calculation, the various departments, in addition to the Department of materials only corresponds to a function, the Department's cost for each function of the real cost, other departments are corresponding to a number of functions, the need for decomposition of stalls, the other administrative, personnel referred to as the administrative on the basis of that, the real cost index of each function is shown in Table 1.

The advantages of laminated glass over monolithic plates are mainly the improvement in impact resistance, the prevention of injuries and complete collapse of glass member, and the reduction of the incoming UV radiation.
In conclusion, let us note that the proposed finite element model was also validated with experimental data and the match was good, see [7].

Item Parameter Standard 1 Antiswelling rate >94% 2 Damage rate 11.5% ≤25 3 Resistance reduction 81.9% 4 Breaking of emulsion at10min,>95% Optimization of Fracture Design The selection of perforation parameters has important effects on stimulated reservoir volume.
The logging data shows that the nature fracture is rich.

Due to the very small amount of published data the author has failed to confirm this assertion.
Summary The results of the analysis allow to conclude, than relief holes, used in thin-walled girders, ribs, etc. constructions, cause an increase of the critical force and a significant reduction in weight, but also carry the risk of create significant stress concentration in the webs and a significant increase of the load in connections webs and skeleton.