Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"CMRR"”.
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Factors predictive of roof instability in addition to the existing CMRR criteria at two case study coal mines
… coal mines is the Coal Mine Roof Rating (CMRR). The CMRR is a field-based empirical method which is straightforward to use and gives a quantitative interpretation of coal mine roof geology. The CMRR classification system was developed by Molinda and Mark (1994) to quantify the geological …
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Novel approaches in current-feedback operational amplifier design
… (CFOA) with a good Common-Mode Rejection Ratio (CMRR), suitable for radio frequency (RF) applications. This research focused on investigation of the established CFOA with the emphases of improving CMRR, bandwidth, Voltage-Offset and Slew-rate performance. The majority of the results of this work …
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Optimizing secondary tailgate support selection
… a stable tailgate entry during mining and the CMRR (Coal Mine Roof Rating). This relationship defines the lower bound of secondary support density currently used in longwall mines. The model used only successful tailgate case history data with adequate ALPS SF according to the CMRR for each …
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Incorporação de dados geomecânicos em projetos de suporte de teto em mina subterrânea de carvão
… de acordo com o sistema Coal Mine Roof Rating (CMRR) proposto pelo U.S. Bureauof Minesem 1994. Diferentes índices de CMRRforam identificados e então considerados para definir a largura máxima nos cruzamentos, o comprimentoe a capacidadede carregamento dos parafusos de teto. Estatísticas da mina …
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Geomechanical behaviour and deformation of coal mine roof strata around faults: toward an engineering geological model
… rock mass rating (RMR), coal mine roof rating (CMRR), roof strength index (RSI) and the Q-system. Both the Leichhardt Seam and overburden rock show marked spatial variability in terms of RMR, CMRR and Q, but RSI showed limited sensitivity to changes in rock mass condition. Relationships were …
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LOW POWER AND HIGH SIGNAL TO NOISE RATIO BIO-MEDICAL AFE DESIGN TECHNIQUES
… will have a better Common Mode rejection ratio (CMRR). The main function of the AFE is to convert the weak electrical Signal into large signals whose amplitude is large enough for an Analog Digital Converter (ADC) to detect without having any errors. A Variable Gain Amplifier (VGA) is sometimes …
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Gateroad Design in Overlying Multi-Seam Mines
… vertical movement in the upper seam and roof CMRR (Coal Mine Roof Rating) to be the controlling factors in damage prediction and, therefore, gateroad planning and design. The relationship between the predicted damage rating and the gateroad stability was established and quantified. To simplify …
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An ultra low power ADC for wireless micro-sensor applications
… the auto-zero reference voltage such the CMRR of the ADC is maximized;
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Calibrating the LaModel Program for Shallow Cover Multiple-Seam Mines
… parameters such as depth, coal mine roof rating (CMRR), entry stresses, etc. to the local stability of the entry.;Statistical analysis of the pillar failure subset of the data indicated that a SF of 2.0 or above resulted in an approximate 90% chance of maintaining global stability. Then, for the …
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Parental Understanding of Miranda Rights
… Comprehension o/Miranda Rights - Recognition (CMRR) (used to measure level of understanding of the Miranda warnings) (Grisso, 1998). Furthermore, the implications for this study supported the notion that having legal counsel present during the waiver process is beneficial to the arrested …
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An investigation of series LC resonant circuits within a sleeve balun to achieve wideband operation
… to study the common mode rejection ratio (CMRR) parameter of the different proposed designs. In addition, three baluns were built and measured in order to compare with simulations. Results demonstrated that the Q of the inductor significantly affects the response over a frequency range. …
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Design of ultra low power analog-to-digital converter for ambulatory EEG recording
… capacitive DAC is utilized to enhance the CMRR. Concepts of split-capacitor array and sub-DAC are combined to reduce the DAC area and power consumption. Charge pumps are used to boost the control voltage of sampling switches. The ADC performs a conversion every 16 clock cycle while being …
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Surface plasmons for enhanced metal-semiconductor-metal photodetectors
… and we measure a common mode rejection ratio (CMRR) value less than 25 dB at 830nm wavelength. This efficient CMRR value makes our B-MSM-PD structure suitable for ultra-high-speed optical telecommunication systems. In addition, this work paves the way for the monolithic integration of B-MSM-PDs …
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Modular High-DR Artifact-Resilient Wearable EEG Headset with Distributed Pulse-Based Feature Extraction and Multiplier-Less Neuromorphic Boosted Seizure Detection
… (CMR) enhancement method achieving >80dB CMRR in the presence of 1MΩ AE-to-AE input impedance (Zin) mismatch (89dB without mismatch), and 6) an AE-specific electrode-tissue impedance (ETI)-correlation-based circuit for motion artifact detection and suppression.