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Impulse-Radio Ultra Wideband (IR-UWB) is a promising technology for indoor localization due to its robustness against multipath interference. In this paper, to deal with the synchronization requirement among anchors in traditional time-difference-of-arrival (TDOA) localization, which is difficult to achieve, an asynchronous time-difference-of-arrival (TDOA) localization method is proposed. The theoretical...
The GMM classifier for pattern recognition has shown increased intention in many applications such as speaker verification and identification. Such classifier requires a large storage and complex processing units but improved in performances. The performances of the GMM and its hardware complexity are analyzed in this paper. FPGA-based hardware implementation of the Log-Add algorithm is presented...
Requirement Engineering is now established is the most critical phase in software engineering and development due to the fact that success or failure of any project depends greatly on wise and correct decisions made and strategies adopted during this phase. However, the great irony is that most of the requirement engineering still relies on outdated, manual and flawed strategies of past decades. The...
Recently speaker recognition system became high interesting by researchers for both software and hardware solutions. Different technologies have been adopted to implement speaker recognition system that has performance with optimal time response with acceptable accuracy. Research progresses are going on to provide highly durable and precise recognition system that can be embedded into critical implementation...
Security of computers and the networks that connect them is increasingly becoming of great significance. As an effect, building effective intrusion detection models with good accuracy and real-time performance are essential. In this paper we propose a new data mining based technique for intrusion detection using Cost-sensitive classification and Support Vector Machines. We introduced an algorithm...
This paper describes and compares some of the most energy and area efficient self-calibration techniques reported over the past years. Additional techniques used to further improve power dissipation are briefly described as well. A robust mixed-signal self-calibration technique is proposed, in which, the multi-bit first stage in the ADC is calibrated without requiring any modifications, as long as...
A novel Neural Network Based Fuzzy Inference System for financial default forecast will be introduced. A wide range of financial forecasts is known. This method is focusing on the economical default forecast, but the method can be used generally for other financial forecasts as well, for example for calculating the Value at Risk. This hybrid method is combined by two classical methods: the artificial...
In this study, we introduce a far field-aware system on a chip (SOC) design for sound source location, which is implemented with 0.18-μm CMOS process. The adopted method for the proposed system is based on average magnitude difference function (AMDF). In order to effectively detect the acoustical source in actual environment, we integrate this system with voice active detection (VAD), which can actively...
A low voltage current sensing circuit is presented in this paper. The proposed current sensing circuit performs continuous-tracking with high accuracy over 98% is achieved. The current sensing circuit is implemented with a standard 0.18μm CMOS process at 1.5V supply voltage. The power efficiency obtains 89% over the maximum load current of 540mA. Wide operation frequency range from 400kHz to 25MHz...
A unified design is presented that can execute floating-point CORDIC operations in both rotation and vectoring modes with significantly reduced computation latency. Unlike previous pipelined CORDIC implementations usually requiring a sequence of micro-rotation stages proportional to bit accuracy, the proposed design consists of only two stages, coarse and fine stages, with each stage realized using...
Power efficiency is a very important issue for portable electronic devices since it determines the battery life. The backlight module usually accounts for the major part of power dissipation in a portable device. Thus, to extend the operation time of a portable device, a high efficiency backlight module should be employed. White light-emitting diodes (WLEDs) have replaced cold cathode fluorescent...
Due to home accidents occurring within the world's aging population, especially with the accidental stumble and falling of the elderly, mortality and morbidity from falls have become one of the major issues in the health care system. In most developed countries, most frequent stumbles and falls occur in and around the community or at home. A number of wearable devices integrated with accelerometers...
Context based recognition system, which can improve the accuracy of scene recognition if robots cannot obtain adequate recognition features in the camera, has attracted researchers recently. However, there are few researches which focus on part-whole supplement system based on context which can describe the scene using detail parts in the scene and also reduce the ambiguity of each detail part using...
In this paper a fast fingerprint verification method is proposed. In which a smaller sub-region captured in fingerprint image is localized as the matching region. It is vital to detect reference points in the fingerprint image for accurate determining such region in this system. First, a priori knowledge of the complete fingerprint acquired during the fingerprint enrollment process. In the same time...
To apply FPGA automation system to the flow adjustment of traditional metering pump is a more advanced study theme. Using computer, FPGA technology and combined modern sensor technology, a FPGA -based metering pump motor rotation rate controlled system was developed. It can control the flow of the metering pump successfully. It is proved that it not only has simplified the flow control operation and...
For improving environmental visual perception of indoor robots more accurate and faster, a new model based on image multi-feature fusion is proposed. The hierarchical match mode is used to match real-time collected images of indoor robot with various multi-directional and multi-state images in a database. After establishing a database of 1000 images, average accuracy, average recall ratio and average...
This paper presents an analysis of the accuracy of urban railway train's parking together with an elaboration of the system structure and principle of parking control in ATO mode. Through the construction of the model of pneumatic brake unit, the non-linear character of pneumatic brake unit is analyzed, and thereby the strategy of feedback control based on the train's position signal is given. Further...
This paper forms the CAD mathematical model for the working line of parallel indexing cam through the analyzing of the principle of parallel indexing cam, at the same time, gives the specific designing calculation procedure, thus reduces the complex designing, abbreviates the designing period, increasing the designing precision.
Suppliers plays a vital role in terms of its ability to provide reliable quality services, which directly determines the credibility of corporate success. In order to solve the problems related to selection of suppliers, we, in this paper, introduce the concept of module design while combining with mixed update mechanism, and then propose a choice model for best trustworthy supplier called BTSM. First...
Repeatability is one of important accuracy properties of precision automatic inspecting machine for aviation coupling (PAIM), which is a kind of post-process inspection machine used in production environment. General Measurement System Analysis (MSA) method is only suitable to single measuring-point independent sample. In order to evaluate the repeatability of PAIM, a new repeatability evaluation...
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