Sensing Technologies + Applications最新文献_第3页

Long-term surface EMG monitoring using K-means clustering and compressive sensing 基于k均值聚类和压缩感知的长期地表肌电监测

Sensing Technologies + Applications Pub Date : 2015-05-19 DOI: 10.1117/12.2176762

Mohammadreza Balouchestani, S. Krishnan

{"title":"Long-term surface EMG monitoring using K-means clustering and compressive sensing","authors":"Mohammadreza Balouchestani, S. Krishnan","doi":"10.1117/12.2176762","DOIUrl":"https://doi.org/10.1117/12.2176762","url":null,"abstract":"In this work, we present an advanced K-means clustering algorithm based on Compressed Sensing theory (CS) in combination with the K-Singular Value Decomposition (K-SVD) method for Clustering of long-term recording of surface Electromyography (sEMG) signals. The long-term monitoring of sEMG signals aims at recording of the electrical activity produced by muscles which are very useful procedure for treatment and diagnostic purposes as well as for detection of various pathologies. The proposed algorithm is examined for three scenarios of sEMG signals including healthy person (sEMG-Healthy), a patient with myopathy (sEMG-Myopathy), and a patient with neuropathy (sEMG-Neuropathr), respectively. The proposed algorithm can easily scan large sEMG datasets of long-term sEMG recording. We test the proposed algorithm with Principal Component Analysis (PCA) and Linear Correlation Coefficient (LCC) dimensionality reduction methods. Then, the output of the proposed algorithm is fed to K-Nearest Neighbours (K-NN) and Probabilistic Neural Network (PNN) classifiers in order to calclute the clustering performance. The proposed algorithm achieves a classification accuracy of 99.22%. This ability allows reducing 17% of Average Classification Error (ACE), 9% of Training Error (TE), and 18% of Root Mean Square Error (RMSE). The proposed algorithm also reduces 14% clustering energy consumption compared to the existing K-Means clustering algorithm.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126052493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Conflict-cost based random sampling design for parallel MRI with low rank constraints 基于冲突代价的低秩约束并行MRI随机抽样设计

Sensing Technologies + Applications Pub Date : 2015-05-19 DOI: 10.1117/12.2179264

Wan Kim, Yihang Zhou, Jingyuan Lyu, L. Ying

{"title":"Conflict-cost based random sampling design for parallel MRI with low rank constraints","authors":"Wan Kim, Yihang Zhou, Jingyuan Lyu, L. Ying","doi":"10.1117/12.2179264","DOIUrl":"https://doi.org/10.1117/12.2179264","url":null,"abstract":"In compressed sensing MRI, it is very important to design sampling pattern for random sampling. For example, SAKE (simultaneous auto-calibrating and k-space estimation) is a parallel MRI reconstruction method using random undersampling. It formulates image reconstruction as a structured low-rank matrix completion problem. Variable density (VD) Poisson discs are typically adopted for 2D random sampling. The basic concept of Poisson disc generation is to guarantee samples are neither too close to nor too far away from each other. However, it is difficult to meet such a condition especially in the high density region. Therefore the sampling becomes inefficient. In this paper, we present an improved random sampling pattern for SAKE reconstruction. The pattern is generated based on a conflict cost with a probability model. The conflict cost measures how many dense samples already assigned are around a target location, while the probability model adopts the generalized Gaussian distribution which includes uniform and Gaussian-like distributions as special cases. Our method preferentially assigns a sample to a k-space location with the least conflict cost on the circle of the highest probability. To evaluate the effectiveness of the proposed random pattern, we compare the performance of SAKEs using both VD Poisson discs and the proposed pattern. Experimental results for brain data show that the proposed pattern yields lower normalized mean square error (NMSE) than VD Poisson discs.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114498496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Multimodal exploitation and sparse reconstruction for guided-wave structural health monitoring 导波结构健康监测的多模态开发与稀疏重建

Sensing Technologies + Applications Pub Date : 2015-05-19 DOI: 10.1117/12.2177472

A. Golato, S. Santhanam, F. Ahmad, M. Amin

引用次数: 8

Compressive power spectrum sensing for vibration-based output-only system identification of structural systems in the presence of noise 基于压缩功率谱感知的结构系统噪声下基于振动的纯输出系统识别

Sensing Technologies + Applications Pub Date : 2015-05-19 DOI: 10.1117/12.2177162

Bamrung Tau Siesakul, K. Gkoktsi, A. Giaralis

{"title":"Compressive power spectrum sensing for vibration-based output-only system identification of structural systems in the presence of noise","authors":"Bamrung Tau Siesakul, K. Gkoktsi, A. Giaralis","doi":"10.1117/12.2177162","DOIUrl":"https://doi.org/10.1117/12.2177162","url":null,"abstract":"Motivated by the need to reduce monetary and energy consumption costs of wireless sensor networks in undertaking output-only/operational modal analysis of engineering structures, this paper considers a multi-coset analog-toinformation converter for structural system identification from acceleration response signals of white noise excited linear damped structures sampled at sub-Nyquist rates. The underlying natural frequencies, peak gains in the frequency domain, and critical damping ratios of the vibrating structures are estimated directly from the sub-Nyquist measurements and, therefore, the computationally demanding signal reconstruction step is by-passed. This is accomplished by first employing a power spectrum blind sampling (PSBS) technique for multi-band wide sense stationary stochastic processes in conjunction with deterministic non-uniform multi-coset sampling patterns derived from solving a weighted least square optimization problem. Next, modal properties are derived by the standard frequency domain peak picking algorithm. Special attention is focused on assessing the potential of the adopted PSBS technique, which poses no sparsity requirements to the sensed signals, to derive accurate estimates of modal structural system properties from noisy sub- Nyquist measurements. To this aim, sub-Nyquist sampled acceleration response signals corrupted by various levels of additive white noise pertaining to a benchmark space truss structure with closely spaced natural frequencies are obtained within an efficient Monte Carlo simulation-based framework. Accurate estimates of natural frequencies and reasonable estimates of local peak spectral ordinates and critical damping ratios are derived from measurements sampled at about 70% below the Nyquist rate and for SNR as low as 0db demonstrating that the adopted approach enjoys noise immunity.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134044451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Group sparsity based spectrum estimation of harmonic speech signals 基于群稀疏度的谐波语音信号频谱估计

Sensing Technologies + Applications Pub Date : 2015-05-19 DOI: 10.1117/12.2180327

Yimin D. Zhang, Ben Wang

引用次数: 1

Enhanced vibration energy harvesting using nonlinear oscillations 利用非线性振荡增强振动能量收集

Sensing Technologies + Applications Pub Date : 2015-05-18 DOI: 10.1117/12.2176840

Emily Engel, Jiaying Wei, Christopher L. Lee

引用次数: 6

C-MEMS for bio-sensing applications C-MEMS用于生物传感应用

Sensing Technologies + Applications Pub Date : 2015-05-18 DOI: 10.1117/12.2180127

Yin Song, R. Agrawal, Chunlei Wang

引用次数: 5

Inhomogeneous thermoelectric materials: improving overall zT by localized property variations 非均匀热电材料:通过局部性质变化改善整体zT

Sensing Technologies + Applications Pub Date : 2015-05-18 DOI: 10.1117/12.2181143

N. Prasad, D. Nemir, J. Beck, J. Maddux, P. Taylor

{"title":"Inhomogeneous thermoelectric materials: improving overall zT by localized property variations","authors":"N. Prasad, D. Nemir, J. Beck, J. Maddux, P. Taylor","doi":"10.1117/12.2181143","DOIUrl":"https://doi.org/10.1117/12.2181143","url":null,"abstract":"The search for improved thermoelectric materials is driven in part by the desire to convert otherwise wasted lowtemperature heat into useful electricity. In this work, we demonstrate a new path towards materials having higher overall zT, and consequently improved capacity to obtain more electrical power from a given content of heat. We produced alloys of (Bi,Sb)2Te3 using a special gas atomization process that is capable of producing source powder material having nanometer-scale grain size. When impulse-compacted by shockwave consolidation, the obtained dense solid will retain its nanostructure because insufficient time and temperature are available for the kinetics of any appreciable grain growth to proceed. However, if there is initial non-uniformity in the properties of the source powder, or if there is stress non-symmetries during shockwave consolidation, then the obtained consolidated material may have locally inhomogeneous properties distributed throughout the material. Thermoelectric property measurements from selected regions within the consolidated sample indicate a wide distribution of properties. For example, the thermal conductivity at room temperature ranged from as low as 1.30 Watts/m-K in one region to higher than 3.00 Watts/m-K in a neighboring region. The electrical resistivity showed similar variation from as low as 0.5 mΩ-cm to as high as 1.5 mΩ-cm. Individually, those regions exhibited thermoelectric material figure-of-merit, zT values ranging between 0.3 and 0.4. However, when combined into a dense nanocomposite, the overall ensemble zT approaches 0.7 which is nearly a factor of 2 higher.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126422465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Synergic system between photovoltaic module and microbial fuel cell with simultaneous pollution control 光伏组件与微生物燃料电池同步污染控制的协同系统

Sensing Technologies + Applications Pub Date : 2015-05-18 DOI: 10.1117/12.2176773

O. Vasyliv, N. Dhere

{"title":"Synergic system between photovoltaic module and microbial fuel cell with simultaneous pollution control","authors":"O. Vasyliv, N. Dhere","doi":"10.1117/12.2176773","DOIUrl":"https://doi.org/10.1117/12.2176773","url":null,"abstract":"Combined photovoltaic module-microbial fuel cell construction shows prospect of advanced autonomous functioning effective energy-production system with the possibility of round-the-clock power generation. Application of Desulfuromonas sp. as anode biocatalyst in photovoltaic (PV) - microbial fuel cell (MFC) could support highly effective eco-friendly energy derivation with simultaneous reduction of organic and inorganic wastes in water environment. D. acetoxidans is exoelectrogenic bacterium that supports S0-reduction with H2S formation and S0-oxidation while an electrode serves as the electron acceptor. Simultaneous sulfur redox processes enhance electron transfer to the electrode surface that may increase the effectiveness of microbial fuel cell performance. It was shown that D. acetoxidans IMV B-7384 possesses selective resistance to 0.5-2.5 mM of copper, iron, nickel, manganese and lead ions. Metal-resistant strains of this bacterium may help overcome H2S toxicity, which is produced because of dissimilative S0-reduction, since divalent cations will interact with sulfide ions, forming insoluble precipitates. Thus D. acetoxidans IMV B-7384 may be applied for remediation of toxic metal ions from water environments because of metal fixation in form of insoluble complexes of metal sulfides. D. acetoxidans IMV B-7384 is presumed to have the capability to convert organic compounds, such as malate, pyruvate, succinate and fumarate via reductive stage of tricarboxylic acid cycle. Thus application of effluents as anolyte in MFC, based on D. acetoxidans IMV B-7384, may cause decrease of its organic content with formation of simple benign constituents, such as CO2 and H2O. Hence the advanced system for eco-friendly energy generation with simultaneous water pollution control is proposed.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114808651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dielectric properties of low temperature nano engineered yttrium copper titanate ceramic 低温纳米工程钛酸钇铜陶瓷的介电性能

Sensing Technologies + Applications Pub Date : 2015-05-18 DOI: 10.1117/12.2177954

Sunita Sharma, M. Singh, K. Mandal, N. Singh

引用次数: 2