摘要：Electroabsorption modulators（EAMs） with negative chirp and very low insertion loss are numerically designed with asymmetric intra-step-barrier coupled double strained quantum wells（AICD-SQWs） based on InGaAlAs *** this purpose,the electroabsorption coefficient is calculated over a range of wells layer strain from compressive（CS） to tensile（TS）.The chirp parameter and insertion loss for TE input light polarization are evaluated from the calculated electroabsorption spectra,and their Kramers-Kronig transformed refractive index *** results of the numerical simulation show that the best range of left and right wells strain for EAMs based on AICD-SQWs with negative chirp and very low insertion loss are from 0.032%to 0.05%（TS） and-0.52% to-0.50%（CS）,respectively.

摘要：In this paper, control design is investigated for hard disk drives in mobile applications with unknown external arbitrarily fast time-varying disturbances. The disturbances can be estimated with exponential accuracy using the proposed disturbance observer based on a series of integral filters. The position error signal will converge to zero with the proposed control technique for systems subjected to the unknown disturbances. The effectiveness of the proposed method is demonstrated by extensive simulation studies.

摘要：In this paper, we design and characterize a novel small size four-channel biosensor based on the two-dimensional photonic crystal with introducing waveguides and nano-cavities in the hexagonal lattice of air pores in the silicon slab. By removing a group of air pores, waveguides are achieved, and nano-cavities are shaped by modifying the radius of air pores. Highly parallel operation of this biosensor due to the special architecture is the capability of the designed structure. The biomaterials which are suspended in a liquid medium inside nano-cavities cause effective refractive index changes which lead to the resonant wavelength shift in the output terminal. According to results, with increasing the refractive index of nano-cavities, resonant wavelengths shifts to longer values. For biochemical sensing like DNA molecule and protein and for the refractive index detection, this novel designed biosensor can be utilized.

摘要：An intelligent security systems engineering approach is used to analyze fire and explosive critical incidents, a growing concern in urban communities. A feed-forward back-propagation neural network models the damages arising from these critical incidents. The overall goal is to promote fire safety and sustainable security. The intelligent security systems engineering prediction model uses a fully connected multilayer neural network, and considers a number of factors related to the fire or explosive incident including the type of property affected, the time of day, and the ignition source. The network was trained on a large number of critical incident records reported in Toronto, Canada between 2000 and 2006. Our intelligent security systems engineering approach can help emergency responders by improving cr^tical incident analysis, sustainable security, and fire risk management.

摘要：Because of its ease of implementation,a linear PID controller is generally used to control robotic *** controllers cannot effectively cope with uncertainties and variations in the parameters;therefore,nonlinear controllers with robust performance which can cope with these are *** sliding mode control(SMC)is a robust state feedback control method for nonlinear systems that,in addition having a simple design,efficiently overcomes uncertainties and disturbances in the *** also has a very fast transient response that is desirable when controlling robotic *** most critical drawback to SMC is chattering in the control input *** solve this problem,in this study,SMC is used with a boundary layer(SMCBL)to eliminate the chattering and improve the performance of the *** proposed SMCBL was compared with inverse dynamic control(IDC),a conventional nonlinear control *** kinematic and dynamic equations of the IRB-120 robot manipulator were initially extracted completely and accurately,and then the control of the robot manipulator using SMC was *** validation,the proposed control method was implemented on a 6-DOF IRB-120 robot manipulator in the presence of *** results were simulated,tested,and compared in the MATLAB/Simulink *** further validate our work,the results were tested and confirmed experimentally on an actual IRB-120 robot manipulator.

摘要：In this paper, a polymer electro-optic mod- ulator has been designed and optimized using the full vectorial finite element method. For this purpose, the effects of magnesium oxide （MgO） and down cladding thicknesses, distance between two ground electrodes, hot electrode and modulator widths modulator on the key modulator parameters, such as microwave effective index r/m, the characteristic impedance Zc and the microwave losses a are presented. After selecting optimal dimensions of polymer electro-optic modulator, frequency dependent aforementioned parameters and the half-wave voltage- length product （VπL） parameter of polymer electro-optic modulator are extracted and as a consequence, an optimized design is reported. Finally, the optical and electrical modulation responses of polymer electro-optic modulator are calculated. The optimized polymer electro- optic modulator exhibits 3-dB electrical bandwidth of 260 GHz and VπL about 2.8 V- cm in this frequency.

摘要：In this paper,a Kretschmann configuration based surface plasmon resonance(SPR)sensor is numerically designed using graphene-MoS_(2) hybrid structure TiO_(2)-SiO_(2) nano particles for formalin *** this design,the observations of SPR angle versus minimum reflectance and SPR frequency(FSPR)versus maximum transmittance(Tmax)are *** chitosan is used as probe legend to perform reaction with the formalin(40%formaldehyde)which acts as target *** this paper,both graphene and MoS_(2) are used as biomolecular acknowledgment element(BAE)and TiO_(2) as well as SiO_(2) bilayers is used to improve the sensitivity of the *** numerical results show that the variation of FSPR and SPR angles for inappropriate sensing of formalin is quite insignificant which confirms the absence of *** the other hand,these variations for appropriate sensing are considerably significant that confirm the presence of *** the end of this article,the variation of sensitivity of the proposed biosensor is measured in corresponding to the increment of a refractive index with a refractive index step 0.01 refractive index unit(RIU).In inclusion of TiO_(2)-SiO_(2) bilayers with graphene-MoS_(2),a maximum sensitivity of 85.375%is numerically calculated.

摘要：Wind energy sources have different structures and functions from conventional power plants in the power *** resources can affect the exchange of active and reactive power of the ***,power system stability will be affected by the performance of wind power plants,especially in the event of a *** this paper,the improvement of the dynamic stability in power system equipped by wind farm is examined through the supplementary controller design in the high voltage direct current(HVDC)based on voltage source converter(VSC)transmission *** this regard,impacts of the VSC HVDC system and wind farm on the improvement of system stability are ***,an algorithm based on controllability(observability)concept is proposed to select most appropriate and effective coupling between inputs-outputs(IO)signals of system in different work *** selected coupling is used to apply damping controller ***,a fractional order PID controller(FO-PID)based on exchange market algorithm(EMA)is designed as damping *** analysis of the results shows that the wind farm does not directly contribute to the improvement of the dynamic stability of power ***,it can increase the controllability of the oscillatory mode and improve the performance of the supplementary controller.

摘要：This paper proposes the financial index of payback period analysis in order to evaluate the economic performance of lighting system. Conventional designs and proposed optimal design using the Energy Conversation Promotion Act （No. 2） B.E. 2550 of Ministry of Energy （Section--The Type or Size of Building Standards and Rules and Procedures, Building Design for Energy Conservation, Act B.E. 2552） are compared based on illumination standard for office building in term of energy consumption, return of investment and environmental impact. Firstly, the Type or Size of Building Standards and Rule and Procedures, Building Design for Energy Conservation, Act B.E. 2552 is reviewed and compared with the conventional designs of lighting system for office building. Next, the lifetime energy consumption of fluorescent lamp T5 with electronic ballast, fluorescent lamp T8 with standard ballast and fluorescent lamp T8 with electronic ballast are simulated using DIALux software program in three sizes office buildings. Then, the payback period and CO2 emission of lighting system for selected office building are simulated by various scenarios, which the analytical results show are the optimal lighting system for office building under the present situation. Finally, the optimal design of lighting system for designated office building in Thailand will be discussed with respect to the energy performance with environmental friendly.

摘要：Random numbers generated by pseudo-random and true random number generators (TRNG) are used in a wide variety of important applications. A TRNG relies on a non-deterministic source to sample random numbers. In this paper, we improve the post-processing stage of TRNGs using a heuristic evolutionary algorithm. Our post-processing algorithm decomposes the problem of improving the quality of random numbers into two phases: (i) Exact Histogram Equalization: it modifies the random numbers distribution with a specified output distribution;(ii) Stationarity Enforcement: using genetic algorithms, the output of (ii) is permuted until the random numbers meet wide-sense stationarity. We ensure that the quality of the numbers generated from the genetic algorithm is within a specified level of error defined by the user. We parallelize the genetic algorithm for improved performance. The post-processing is based on the power spectral density of the generated numbers used as a metric. We propose guideline parameters for the evolutionary algorithm to ensure fast convergence, within the first 100 generations, with a standard deviation over the specified quality level of less than 0.45. We also include a TestU01 evaluation over the random numbers generated.