检索结果-内蒙古大学图书馆

SSRN 2024年

作者： Bhaktha, Shivakiran B.N. Mudi, Rina Carpentiero, Alessandro Bollani, Monica Barozzi, Mario Debnath, Kapil Chiappini, Andrea Advanced Technology Development Centre IIT West Bengal Kharagpur721302 India Istituto di Fotonica e Nanotecnologia—CNR IFN and FBK Photonics Unit Via alla Cascata 56/c Povo Trento38123 Italy LNESS Laboratory Como22100 Italy Centro SD - MTSD Fondazione Bruno Kessler Via Sommarive 18 Povo Trento38123 Italy School of Natural and Computing Sciences University of Aberdeen AberdeenAB243UE United Kingdom Department of Electronics and Electrical Communication Engineering IIT Kharagpur West Bengal 721302 India Department of Physics IIT West Bengal Kharagpur721302 India

We report the excitation of optical Tamm states (OTS) in inverse opal (IO) - based three-dimensional photonic crystal on a flat metal substrate, validated through both numerical simulations and experimental observations. Large area, uniform Tamm inverse opal (Tamm-IO) structures were fabricated without the use of any corrosive chemicals. Upon infiltration of non-reactive solvents such as methanol and ethanol into the IO, a noticeable shift of the OTS, consistent with our simulations is observed, and the temporal dynamics of the same have been investigated. The experimentally obtained sensitivity is ~ 110 nm/RIU which is of the same order as the computed value, making the IO OTS to be an attractive sensing tool. © 2024, The Authors. All rights reserved.

关键词： Photonic crystals

来源：评论

学校读者我要写书评

暂无评论

Inverse Opal Optical Tamm State for Sensing Applications

arXiv

引用

arXiv 2024年

作者： Mudi, Rina Carpentiero, Alessandro Bollani, Monica Barozzi, Mario Debnath, Kapil Chiappini, Andrea Shivakiran Bhaktha, B.N. Advanced Technology Development Centre IIT Kharagpur West Bengal 721302 India Istituto di Fotonica e Nanotecnologia—CNR IFN and FBK Photonics Unit Via alla Cascata 56/c Povo Trento38123 Italy LNESS Laboratory Como22100 Italy Centro SD - MTSD Fondazione Bruno Kessler Via Sommarive 18 Povo Trento38123 Italy School of Natural and Computing Sciences University of Aberdeen AberdeenAB243UE United Kingdom Department of Electronics and Electrical Communication Engineering IIT Kharagpur West Bengal 721302 India Department of Physics IIT West Bengal Kharagpur721302 India

We report the existence of optical Tamm states (OTS) in inverse opal (IO) - based three-dimensional photonic crystal on a flat metal substrate, validated through both numerical simulations and experimental observations. Our fabrication approach for the Tamm inverse opal (Tamm-IO) structure is notably straightforward and does not involve corrosive chemicals. Upon infiltration of non-reactive solvents such as methanol and ethanol into the IO, a noticeable shift of the OTS, consistent with our simulations is observed, and the temporal dynamics of the same have been investigated. The experimentally obtained sensitivity is ~ 110 nm/RIU which is of the same order as the computed value, making the IO OTS to be an attractive sensing tool. © 2024, CC BY.

关键词： Photonic crystals

来源：评论

学校读者我要写书评

暂无评论

ARM-FPGA Implementation of a Partially Reconfigurable OFDM-MIMO Phy-Link

ARM-FPGA Implementation of a Partially Reconfigurable OFDM-M...

引用

2018 International CET Conference on Control, Communication, and computing, IC4 2018

作者： Kumar, K.A. Arun Centre for Development of Advanced Computing Trivandrum India

ISBN: (纸本)9781538649664

MIMO-OFDM systems are known for high data rate and lower bit error rate (BER) in wireless communication system. These systems helps to yield high data rate and spectral efficiency over multipath and fading channels. OFDM systems use varying modulation schemes and IFFT points based on data rate requirements and number of carriers. Similarly the MIMO system uses an \mathbf{MxM} antenna array with M ranging from 2 to M. Based on the channel conditions and environment a particular combination can perform better with maximum throughput and minimum BER. This paper explores a software defined reconfigurable hardware for the realization of MIMO-OFDM systems and a physical layer link implemented in Xilinx FPGA with partial reconfiguration. The phy link involves a QPSK and a QAM modem with \mathbf{2}\mathrm{x}\mathbf{2} and \mathbf{4\mathrm{x}4} antenna array. Using Partial reconfiguration technique the user can switch between these two schemes in minimum time without configuring the entire FPGA which will take 2 to 3 minutes based on the application. The same hardware can be used for designing multiple combination of modulation, number of carries and antenna array with partial reconfiguration which helps to maintain same hardware and switching between the schemes. © 2018 IEEE.

关键词： MIMO systems

来源：评论

学校读者我要写书评

暂无评论

PannoMulloKathan: Voice enabled mobile app for agricultural commodity price dissemination in Bengali language 19

PannoMulloKathan: Voice enabled mobile app for agricultural ...

引用

19th Annual Conference of the International Speech Communication, INTERSPEECH 2018

作者： Pal, Madhab Roy, Rajib Khan, Soma Bepari, Milton S. Basu, Joyanta Centre for Development of Advanced Computing Kolkata India

In this work we present a voice based mobile application for dissemination of agricultural commodity procurement and consumer prices. Disbursed information is crawled at daily basis from government authorized websites of agricultural marketing departments. The app incorporates mix media multiple access means in form of touch-type-see, touch-type-listen, speak-see and speak-listen modalities and also includes a robust Automatic Speech Recognition (ASR) engine in Bengali language to support real time voice queries. Colorful interactive app based user interface and ASR incorporated core client-server architecture altogether provides an efficient framework for serving registered users of different educational and economical background including people having little or no computer knowledge, semi-literate or illiterate rural people. © 2018 International Speech Communication Association. All rights reserved.

关键词： Speech recognition

来源：评论

学校读者我要写书评

暂无评论

Collaborative Deep Neural Network for Printed Text Recognition of Indian Languages

Collaborative Deep Neural Network for Printed Text Recogniti...

引用

International Conference on Image Information Processing

作者： Kapil Mehrotra Manish Kumar Gupta Karan Khajuria Centre for Development of Advanced Computing (C-DAC) Pune India

The following topics are dealt with: learning (artificial intelligence); feature extraction; image classification; convolutional neural nets; face recognition; medical image processing; object detection; image segment...

关键词：

来源：评论

学校读者我要写书评

暂无评论

Hardware-Assisted Flow Monitoring for High Speed Networks

Hardware-Assisted Flow Monitoring for High Speed Networks

引用

International Conference on computing and Networking Technology (ICCNT)

作者： Sajish Chandrababu Chinmay Bahulekar Rakesh Yadav Dhruv Desai Centre for Development of Advanced Computing (C-DAC) Pune India

In today's high-speed networks, network flow monitoring has become prevalent method for monitoring network traffic. Flow based monitoring system involves tasks like packet classification, flow generation and management, flow export and flow analysis. We have proposed a hardware-assisted architecture for flow monitoring for high speed networks. Our architecture maps packet classification and flow generation tasks into FPGA hardware. Remaining tasks are performed in software. By doing this bifurcation we have tried to exploit best of both hardware and software domains. The proposed architecture is implemented on Altera Stratix-IV FPGA board and the hardware details for the same are provided here. The implemented architecture was thoroughly tested and maximum performance of 20.2 Gbps was achieved.

关键词： Software Computer architecture Monitoring Hardware Field programmable gate arrays Probes Task analysis

来源：评论

学校读者我要写书评

暂无评论

Assessing Performance of Bengali Speech Recognizers Under Real World Conditions Using GMM-HMM and DNN Based Methods 6

Assessing Performance of Bengali Speech Recognizers Under Re...

引用

6th Workshop on Spoken Language Technologies for Under-Resourced Languages, SLTU 2018

作者： Khan, Soma Pal, Madhab Basu, Joyanta Bepari, Milton S. Roy, Rajib Centre for Development of Advanced Computing Kolkata India

Real world Automatic Speech Recognition (ASR) system development requires rigorous performance review under varying real world conditions. This paper reports our effort on ASR resource creation, transcription, system building and performance assessment for connected and continuous word applications in Bengali language (ranked seventh worldwide) using GMM-HMM and DNN framework on available open source toolkits. Baseline models are built from merging Bengali dataset hosted on government sites with application specific 100 hours indigenous audio collected under target deployment scenario. After feedback analysis of live systems by real users, novel Error Handling Techniques like Signal Analysis and Decision, Confidence based ASR output Polling and Runtime LM are implemented which results around 2%-11% overall gain in WER with encouraging task success rates in final field trials. Results suggest that recent approaches along with application, environment, target user and runtime resource specific appropriate strategies will yield better acceptability of live ASR systems in India. © SLTU 2018. All rights reserved.

关键词： Speech recognition

来源：评论

学校读者我要写书评

暂无评论

Blur Detection in Identity Images Using Convolutional Neural Network

Blur Detection in Identity Images Using Convolutional Neural...

引用

International Conference on Image Information Processing

作者： Karan Khajuria Kapil Mehrotra Manish Kumar Gupta Centre for Development of Advanced Computing (C-DAC) Pune India

Today, the digital photos especially identity images are used in almost every form filling application. As user is uploading his/her photographs, the image quality issues will come up. Especially, if some automatic processing like face recognition is happening at back end. The image quality parameters include resolution/dimensions, size and blur. Apart form blur, rest can be checked by simple conditions. But, blur detection cannot be solved in a trivial way. Here we are proposing a deep learning based approach for detecting the blur in an image. We have prepared data comprising 250,000 identity images. Our aim is to provide a comprehensive list of clear and blur images before learning happens. Apart from naturally blurred images, we have added five types of artificial blur into the images for better generalization. We have done comparative analysis of our approach to statistical feature extractor i.e. BRISQUE which was trained on SVM. We have empirically selected the convolutional network with 4 layers. Performance evaluation shows the proposed approach is giving 98.05% on 113,000 images, and thus outperforming BRISQUE using SVM.

关键词： Feature extraction Kernel Image quality Neural networks Deep learning Support vector machines Databases

来源：评论

学校读者我要写书评

暂无评论

Entanglement-enabled quantum kernels for enhanced feature mapping

APL Quantum

引用

APL Quantum 2025年第1期2卷

作者： Anand Babu Saurabh G. Ghatnekar Amit Saxena Dipankar Mandal Quantum Materials and Devices Unit Institute of Nano Science and Technology Knowledge City Sector 81 Mohali 140306 India School of Artificial Intelligence and Data Science Indian Institute of Technology Karwar Jodhpur 342030 India Artificial Intelligence and Quantum Technology Group Centre for Development of Advanced Computing (C-DAC) Pune India

Classical machine learning, extensively utilized across diverse domains, faces limitations in speed, efficiency, parallelism, and processing of complex datasets. In contrast, quantum machine learning algorithms offer significant advantages, including exponentially faster computations, enhanced data handling capabilities, inherent parallelism, and improved optimization for complex problems. In this study, we used the entanglement enhanced quantum kernel in a quantum support vector machine to train complex respiratory datasets. Compared to classical algorithms, our findings reveal that quantum support vector machine (QSVM) performs better with higher accuracy (45%) for complex respiratory datasets while maintaining comparable performance with linear datasets in contrast to their classical counterparts executed on a 2-qubit system. Through our study, we investigate the efficacy of the QSVM-Kernel algorithm in harnessing the enhanced dimensionality of the quantum Hilbert space for effectively training complex datasets.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Use of Social Media/Microblogging Platform along with GIS for Mapping Disaster

Use of Social Media/Microblogging Platform along with GIS fo...

引用

IEEE UP Section Conference on Electrical Computer and Electronics (UPCON)

作者： Kulranjan Sanjay Ojha School of Information Technology Centre for Development of Advanced Computing Noida India

ISBN: (纸本)9781728134567

Twitter is a vast store of textual data that can be helpful in determining disaster related crisis. In this research the aim is to implement a system that can acquire tweets from Twitter using the keyword `earthquake' and determine the disaster location soon after the disaster. For prefiltering the tweets, a statistical approach has been developed. For determining out of context tweets a fuzzy matching approach has been used. To further categorize those tweets as relevant and irrelevant, Multinomial Naïve Bayes classifier has been used. Relevant tweets were further analyzed to determine probable location of the disaster using a clustering-based approach. After obtaining the probable location of the disaster; it is then visualized on map.

关键词： disasters emergency management geographic information systems social networking (online) Disasters geographic information systems crisis management TWITTER Emergency Services Social Media

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：