New Method For Realization Research Articles

The method of real-time implementation of tone mapping and bloom effect

This paper deals with the implementation of real-time image processing of rendered virtual scenes, where lighting calculations are produced in a high dynamic range. In this paper we propose a new method for realization of images' tone compression and modeling of "bloom" effect over bright areas using parallel computing on the GPU in real-time. The method is based on a modified version of the Reinhard's global tone operator with the original algorithm of calculating global luminances of the frame and provides a simulation of the effect of blooming bright areas of the image. The proposed solution can be used in visualization for simulators and virtual environment systems.

Protecting Privacy by Multi-dimensional K-anonymity

Privacy protection for incremental data has a great effect on data availability and practicality. K-anonymity is an important approach to protect data privacy in data publishing scenario. However, it is a NP-hard problem for optimal k-anonymity on dataset with multiple attributes. Most partitions in k-anonymity at present are single-dimensional. Now research on k-anonymity mainly focuses on getting high quality anonymity while reducing the time complexity, and new method of realization of k-anonymity properties according to the requirement of published data. Although most k-anonymity algorithms perform well on static data, their effects decrease when they are on the changing data of real world. This paper proposes a multi-dimensional k-anonymity algorithm based on mapping and divide-and-conquer strategy that is feasible and performs much better in k-anonymity. The second main contribution of this paper is an effective k-anonymity method based on incremental local update on large dataset. It incrementally updates the changing dataset, and a threshold is set to assure the stability of update. Neighbor equivalence sets and similar equivalence sets are computed by their position, which not only avoids the cost of recalculation aroused by little change of dataset, but also improves the practical application performance since the dataset satisfies k-anonymity properties. The experiment shows that the proposed algorithm has a better performance in both time cost and anonymity quality, compared to the methods at present.

A randomized stochastic optimization algorithm: Its estimation accuracy

For a randomized stochastic optimization algorithm, consistency conditions of estimates are slackened and the order of accuracy for a finite number of observations is studied. A new method of realization of this algorithm on quantum computers is developed.

Two-dimensional optical mask design and atom lithography

Atom lithography is one of the latest proposals for high-resolution printing. The mask design and generation is key step for implementation of this method. In this paper, we have theoretically investigated and proposed a new method for two-dimensional optical mask design in atom lithography. A new method for realization of our proposed technique based on guided modes will present. With our proposed idea one can easily print every kind of two-dimensional patterns. This method can lead us to produce the nano-scale electronic and optical devices and systems. Also, a suitable algorithm for mask generation is proposed.

A realization of oversampled cosine modulated filter banks with perfect reconstruction

In the design of filter banks, the cosine-modulated filter bank (CMFB) has drawn attention due to reduced computational overhead and case of design. In the conventional design method for a linear-phase CMFB, delay elements are added to the transfer function in order to realize the paraunitary property. Therefore, the polyphase structure carries out the rate transformation in two steps and the computation of the prototype filter is executed in a form where the rate is not completely reduced. Hence, the scheme is not optimum in terms of the computational overhead per unit time. Also, the splitting shape of the linear-phase split filter is a special one and is not equally split. In consideration of the above, a new method of realization is considered in this paper for an oversampled linear-phase CMFB. In its realization, reduction of the overall computation overhead is considered. At the same time, a transfer function with an equally split shape is presented. From the proposed transfer function, a polyphase structure is derived in which the computation is possible with a completely reduced rate for an arbitrary integer sampling. In realization of the perfect reconstruction, a method is proposed in which the paraunitary property is removed and the synthesis side can be constructed with a small amount of computation. © 2001 Scripta Technica, Electron Comm Jpn Pt 3, 85(2): 32–42, 2002

A realization of oversampled cosine modulated filter banks with perfect reconstruction

AbstractIn the design of filter banks, the cosine‐modulated filter bank (CMFB) has drawn attention due to reduced computational overhead and case of design. In the conventional design method for a linear‐phase CMFB, delay elements are added to the transfer function in order to realize the paraunitary property. Therefore, the polyphase structure carries out the rate transformation in two steps and the computation of the prototype filter is executed in a form where the rate is not completely reduced. Hence, the scheme is not optimum in terms of the computational overhead per unit time. Also, the splitting shape of the linear‐phase split filter is a special one and is not equally split. In consideration of the above, a new method of realization is considered in this paper for an oversampled linear‐phase CMFB. In its realization, reduction of the overall computation overhead is considered. At the same time, a transfer function with an equally split shape is presented. From the proposed transfer function, a polyphase structure is derived in which the computation is possible with a completely reduced rate for an arbitrary integer sampling. In realization of the perfect reconstruction, a method is proposed in which the paraunitary property is removed and the synthesis side can be constructed with a small amount of computation. © 2001 Scripta Technica, Electron Comm Jpn Pt 3, 85(2): 32–42, 2002

The minimal order of rational transfer function realization from its z-domain samples

We present here a new method for realization of minimal-order proper rational transfer functions from z-domain samples. A criterion for determining the minimal order of the transfer function is given. The theory is developed first for strictly proper rational transfer functions and then extended to the case of transfer functions with a direct-coupling term. The theory is valid for arbitrary z-domain samples. The special case of uniform frequency response samples is shown to allow a computationally efficient derivation of the realization. Examples are given to illustrate the theory. The theory developed here has many applications, such as modelling of communication channels, identification of systems from frequency measurements and infinite impulse response filter design.

Realization of Fail-Safe Sequential Machines by Using a k-out-of-n Code

A fail-safe sequential machine is one that produces safe-side output when failures occur in the machine. This paper presents a new method of realization of fail-safe sequential machines under the following assumptions: 1) failure is caused by a single fault of element in the machine, 2) output of faulty element is stuck at one or zero, and 3) input does not malfunction.

RC amplifiers for active filters†

This paper presents of new method of realization of second-degree filters having low-pass, band-pass and high-pass characteristics. Each of the characteristics requires two unity gain non-inverting type amplifiers in addition to passive resistances and capacitances. Details of sensitivity analysis have been reported. This method of realization gives appreciably low Q sensitivity due to the variation of passive elements. But the Q sensitivity due to the variation of the gain of the amplifier becomes a little high. This limits its application in high-Q filters.

Nová metoda k vytvoření netlumených oscilací (Předběžná zpráva)

Nová metoda k vytvoření netlumených oscilací (Předběžná zpráva)