We propose a variation of simplex-downhill algorithm specifically customized for optimizing parameters in statistical machine translation (SMT) decoder for better end-user automatic evaluation metric scores for translations, such as versions of BLEU, TER and mixtures of them. Traditional simplexdownhill has the advantage of derivative-free computations of objective functions, yet still gives sa...

The paper focuses on the efficiency of the hybrid evolutionary algorithm (HEA) for solving the global optimization problem arising in electronic imaging. The particular version of the algorithm utilizes image local response (ILR), in order to reduce the computational cost. ILR is defined as the variation of fitness function due to a small variation of the parameters, and is computed over a smal...

Most of statistical machine translation systems are combinations of various models, and tuning of the scaling factors is an important step. However, this optimisation problem is hard because the objective function has many local minima and the available algorithms cannot achieve a global optimum. Consequently, optimisations starting from different initial settings can converge to fairly differe...

This paper presents two techniques for the design of digital filters with wordlength-constrained coefficients, the bit-flipping algorithm improved since it was first presented in [l] and the Downhill Simplex Method [2] modified to deliver fixed-point filter coefficients. Both techniques can be applied to design of filter coefficients from scratch or to the optimisation of their floatingpoint ve...

This paper presents travel time geoacoustic inversion of broadband data collected on a vertical line array at short range of 230 m during the Shallow Water 2006 experiments. A ray-tracing method combined with a hybrid optimization algorithm that utilizes differential evolution and downhill simplex was used for the inversion of sediment properties. The ocean sound speed profile and geometric par...

A set of laboratory experiments were conducted to study the impact vegetation on bed form resistance and load transport in a mobile channel. Vegetation stems simulated by using arrays emergent polyvinyl chloride (PVC) rods several staggered configurations. The total flow was divided into bed, sidewall, resistances. Bed further separated grain (i.e., ripples dunes) By analyzing experimental data...

In the microcanonical ensemble for string theory on AdSm × Sn, there is a phase transition between a black hole solution extended over the Sn and a solution localized on the Sn if the AdSm has the topology R2 × Sm−2. The phase transition will not appear if the AdSm has the topology R2 × Tm−2, that is, when the AdSm × Sn geometry is regarded as arising from the nearhorizon limit of a black m− 2 ...

The shared memory system can reduce the cost of programming effort in the distributed memory systems. On distributed systems such as networks of computers, it is necessary to provide the shared memory model by software. We have proposed an “Asymmetric Distributed SharedMemory: ADSM”, that provides high-speed-update distributed memory access by software. The compiler for the ADSM translates the ...

We propose a novel estimation method of the rotational velocity of a flying ball as well as its position and translational velocity via aerodynamics model by measuring the ball trajectory using the middle speed cameras for table tennis system. The aerodynamics model is complex nonlinear and the measured data of the ball trajectory has quantization errors because the size of the ball is very sma...

Abstract Micelles and micellization appeal long lasting interest as promising drug carriers. A conventional parameter providing information about formation of micelles is critical micelle concentration (cmc). Its value roughly separates two states the surfactant solution – namely with without presence micelles. If surfactants in water approaches cmc some physical quantities abruptly change, thi...