The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
By the transfer matrix method, dispersive characteristics of the shear horizontal (SH) surface waves in semi-infinite piezoelectric(PE)/elastic(EL)/piezomagnetic(PM) and PM/EL/PE layered periodic structures are investigated. The free surface is parallel to the layer interfaces. Both PE and PM materials are transversely isotropic. The effects of different electric-magnetic boundary conditions at the...
In digital integrated circuit designing, energy dissipation has become a crucial factor which engineers would consider before they begin the design. However, irreversible computing is one of the most significant factors of energy dissipation. Therefore, designing digital circuits by reversible logic way is an efficient way to decline the energy dissipation of the circuit. In this paper, we proposed...
Possibilistic reliability theory is the study of reliability based on the principles of possibility theory. In this paper, the possibilistic reliability function of multi-state system is redefined and analyzed utilizing the possibility distribution of system lifetime. In order to express the internal relationship between system state and residual lifetime, state corresponding most possible residual...
As the end point of the power system, a distribution system directly connects with the consumers. The reliability of power supply is directly related with consumers. However, uncertainty of the original parameters of components may be caused by lacking of statistical information and the statistic error. It will inevitably produce large errors if we directly use these parameters for evaluation. The...
Reactive and harmonic current produced by electric railway seriously affects the power quality of power supply system. Based on the electric railway practice, this paper designed a shunt method in the side of voltage 27.5kV to solve reactive and harmonics current problem. Study a high-performance control method of cascade single phase STATCOM, which includes modulating signal calculation, individual...
Body area networks (BANs) are of importance for telemedicine and telehealth services, so they have caught many engineers' attention. A coordinator in a BAN plays a significant role to collect signals from sensors and interface with telecommunication networks. Since the wireless channel of BAN is very complicated and changeable, the modulation is not fixed. As a result, the coordinator must have different...
Reversible logic is a key technique for quantum computing so leading to low-power designs. However, current synthesis algorithms for reversible circuits are low efficiency and do not obtain optimized reversible circuits, so they are only applied to small logic functions. In this paper, we propose a new method based on positive Davio expansion to synthesize reversible circuits, which generates a positive...
We present a way of synthesis of reversible circuits using redundant faults information obtained with the aid of its classical counterpart. We use Toffoli-based modules of classical standard gates and technology mapping to relate the effect of redundant stuck-at-value fault in classical irreversible gate level circuits and their reversible implementation. The simplified form of such Toffoli modules...
The application of adaptive noise feedback control on a FM demodulator greatly decreases distortion and noise sensitivity in the demodulation of wide-band FM signals. In this paper, the approach for FM signal demodulation using the RLS algorithm of adaptive filters and noise decision feedback loop is proposed. The white noise signals can be effectively estimated and eliminated with the RLS algorithm...
In this paper, the fuzzy assessment information is derived for the eight failure modes and relative importance weights of three risk factors by utilizing the interval number matrix multiplying method. Fuzzy Risk Priority Numbers (FRPNs) are defined as Fuzzy Weighted Geometric Mean (FWGM) of the fuzzy ratings for the three risk factors for prioritization of failure modes, and it can be calculated using...
When there is limited objective reliability data, a new method of developing the possibility distribution by subjective assignment strategy is put forward, which makes use of the concept of interval-valued possibilistic mean value of a L-R fuzzy number and is then illustrated by the lifetime data from flexural fatigue reliability modeling and data analysis. An application of four groups' gear-tooth...
As a new technique for low-power design and quantum computing, reversible logic has been paid much attention. A significant part of research lies in synthesizing a reversible network from non-reversible specification. However, current synthesis algorithms for reversible circuits suffer low efficiency and do not reach area optimization, so they are only applicable to small logic functions. In this...
Allocating bit-widths is a necessary step in high-level synthesis. The main disadvantages of past methods, such as dynamic analysis or affine arithmetic, lie in low efficiency and coarse results which may lead to huge execution time and unnecessary additional bits for representation. In this paper, an algorithm is based on static analysis is proposed to perform range analysis and allocate integer...
Range analysis is an important task in obtaining the correct, yet fast and inexpensive arithmetic circuits. The traditional methods, either simulation-based or static, have the disadvantage of low efficiency and coarse bounds, which may lead to unnecessary bits. In this paper, we propose a new method that combines several techniques to perform fixed-point range analysis in a datapath towards obtaining...
Range analysis is an important step in determining integer bit-widths for arithmetic DSP circuits. Disadvantages of conventional methods, such as long calculation time and coarse results, limit their applicability. In this paper, we propose a new method based on affine arithmetic and Arithmetic Transform to perform range analysis, which can efficiently and tightly calculate the range and allocate...
Arithmetic circuit plays a key role in digital signal processing (DSP). A datapath is used to implement the specification usually represented as a polynomial. The two most important problems are verification and optimization of the arithmetic circuits. Circuit verification confirms whether the implementation can realize the specification with correct behavior or two implementations match well, and...
The application of multi-media in teaching attracts more and more educators' attention, but many problems of multi-media teaching and learning have still existed in many county-level high schools in Hebei province, and the concerning degree about this is relatively small. Therefore, this paper will use questionnaires and visits as the research methods to collect all aspects of information about multi-media...
Arithmetic circuits in general do not match specifications exactly, leading to different implementations within allowed imprecision. We present a technique to search for the least expensive fixed-point implementations for a given error bound. The method is practical in real applications and overcomes traditional precision analysis pessimism, as it allows simultaneous selection of multiple word lengths...
Based on some practical problems in industrial engineering, a species of two-unit parallel repairable system model is introduced in this paper. The prominent feature of the model is described as follows: if a repair time is sufficiently short (less than some threshold value) that does not affect the system operation, i.e. the effect could be ignored, the system can be considered as being operating...
This paper has studied the frequency band characteristics of the piezoelectric/piezomagnetic layered periodic composites. Both piezoelectric and piezomagnetic materials are assumed to be transversely isotropic. The displacement transfer coefficients of all the scattered waves are calculated by the transfer matrix and the stiffness matrix methods. Numerically calculated results show that the band structures...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.