Results 11 to 20 of about 11,442,264 (328)

Laser Linewidth Analysis and Filtering/Fitting Algorithms for Improved TDLAS-Based Optical Gas Sensor

Sensors, 2023
Tunable Diode Laser Absorption Spectroscopy (TDLAS) has been widely applied in in situ and real-time monitoring of trace gas concentrations. In this paper, an advanced TDLAS-based optical gas sensing system with laser linewidth analysis and filtering ...
Chen Tong, Chaotan Sima, Muqi Chen, Xiaohang Zhang, Tailin Li, Yan Ai, Ping Lu   +6 more
doaj   +1 more source

Quick Suppression of DDoS Attacks by Frame Priority Control in IoT Backhaul With Construction of Mirai-Based Attacks

IEEE Access, 2022
We propose a novel distributed denial of service (DDoS) attack suppression system that significantly reduces discarding of normal traffic (i.e., the traffic from Internet of Things (IoT) devices that are not infected with a malware) with a small number ...
Rintaro Harada, Naotaka Shibata, Shin Kaneko, Kazuaki Honda, Jun Terada, Yota Ishida, Kunio Akashi, Toshiyuki Miyachi   +7 more
doaj   +1 more source

The Low-Loss Spot Size Converter for Alignment with Cleaved Single Mode Fiber

Applied Sciences, 2023
Integrating the graded index (GRIN) waveguide with the 2-D inversely-tapered waveguide, a new design of spot size converter (SSC) has been proposed to couple the light beam between the cleaved single-mode fiber (SMF) and the silicon (Si) wire waveguide ...
Jinyang Zhao, Zhutian Wang, Nan Ye, Fufei Pang, Yingxiong Song   +4 more
doaj   +1 more source

Evaluating Multimedia and Language Tasks

Frontiers in Artificial Intelligence, 2020
Evaluating information access tasks, including textual and multimedia search, question answering, and understanding has been the core mission of NIST's Retrieval Group since 1989.
Ian Soboroff, George Awad, George Awad, Asad Butt, Asad Butt, Keith Curtis   +5 more
doaj   +1 more source

Cooperated Traffic Shaping With Traffic Estimation and Path Reallocation to Mitigate Microbursts in IoT Backhaul Network

IEEE Access, 2021
An aggregating switch (SW) network offers cost-effective accommodation to Internet-of-Things (IoT) traffic by aggregating the traffic. In such a network, it is crucial to eliminate the discarded traffic caused by the simultaneous transmission of massive ...
Kazuaki Honda, Naotaka Shibata, Rintaro Harada, Yota Ishida, Kunio Akashi, Shin Kaneko, Toshiyuki Miyachi, Jun Terada   +7 more
doaj   +1 more source

Design and Prototype Implementation of Software-Defined Radio Over Fiber

IEEE Access, 2021
Future networks require a high degree of flexibility over wide areas to enable many services that require higher quality wireless networks such as remote control of cars and remote surgery.
Takumasa Ishioka, Kazuki Aiura, Ryota Shiina, Tatsuya Fukui, Tomohiro Taniguchi, Satoshi Narikawa, Katsuya Minami, Kazuhiro Kizaki, Takuya Fujihashi, Takashi Watanabe, Shunsuke Saruwatari   +10 more
doaj   +1 more source

Refractometry With a Tailored Sensitivity Based on a Single-Mode-Capillary-Single-Mode Fiber Structure

IEEE Photonics Journal, 2017
We demonstrate a simple structure for the refractive index sensing by splicing a segment of capillary with two segments of single-mode fibers (SMFs). By selecting appropriate splicing parameters, two mode coupling regions can be formed with tapered air ...
Xiaobei Zhang, Haiyang Shao, Yong Yang, Haiyang Pan, Fufei Pang, Tingyun Wang   +5 more
doaj   +1 more source

Roughness Estimation of Multimode Rectangular Optical Waveguide Based on the Scattering Loss Difference Between SMFW and MMFW Structures

IEEE Photonics Journal, 2017
Based on the scattering loss difference between the single-mode-fiber-optical-waveguide (SMFW) and multimode-fiber-optical-waveguide (MMFW) structures, a method to estimate the roughness of multimode rectangular optical waveguide (ROW) is proposed. Based
Chuanlu Deng, Tingyun Wang, Jiamin Chen, Chengbo Mou, Xiaobei Zhang, Xinjie Yan, Fufei Pang   +6 more
doaj   +1 more source

Surface-enhanced Raman scattering spectra revealing the inter-cultivar differences for Chinese ornamental Flos Chrysanthemum: a new promising method for plant taxonomy

Plant Methods, 2017
Background Flos Chrysanthemi, as a part of Chinese culture for a long history, is valuable for not only environmental decoration but also the medicine and food additive.
Heng Zhang, Zhenyi Chen, Taihao Li, Na Chen, Wenjie Xu, Shupeng Liu   +5 more
doaj   +1 more source

Photo-Generation of Tunable Microwave Carriers at 2 µm Wavelengths Using Double Sideband with Carrier Suppression Modulation

Applied Sciences, 2022
At 2 µm wavelengths (149.9 THz), hollow-core photonics band gap fibers have higher light power damage thresholds, stable polarization states, and lower losses of 0.1 dB/km.
Di Ji, Zhitao Hu, Nan Ye, Fufei Pang, Yingxiong Song   +4 more
doaj   +1 more source