- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Infrared thermographic test for removing background reflection based on polarization theory
摘要： The infrared thermographic test is often influenced by the environment, which sometimes causes false defect detection. Thus, the background reflection from sunlight or neighboring structures is a serious problem. In the present study, we solve this problem by quantitatively separating the background reflection and the defects by using the polarization theory for dielectrics. The proposed program can remove the background reflection and obtain a thermal image including only the emitted energy from the defect part. According to the experimental results, we establish a reflection removal infrared thermographic test using the polarization theory for dielectrics.
关键词： Infrared Thermographic Test,Polarization Theory,Quantitative Evaluation,Background Reflection,Dielectrics
更新于2025-09-19 17:15:36
-
Spider beam source ready for operation
摘要： The SPIDER Beam Source (BS), the first prototype of a full scale ion source for the ITER Heating Neutral Beam injector, was delivered to the Neutral Beam Test Facility (NBTF) site in Padova (Italy) after about five years procurement phase. A huge effort was devoted during the procurement for quality controls and testing at the supplier's workshops. Several activities were also carried out on NBTF site for verification/adjustment of interfaces, solution of still open issues, as well as final tests before and after installation inside the vacuum vessel. The NBTF Team undertook the BS site acceptance tests including: pressure and leak tests of the hydraulic circuits; electrical tests; measurement of magnetic field profiles; functionality tests of diagnostics installed on the BS; checks of grids alignment by means of laser tracker. Accurate positioning of the BS inside the vacuum vessel was performed and various service lines were connected in a tight space. Several improvements were undertaken in order to guarantee reliability and reduce the risks during the commissioning and experimental campaign in 2018. After installation, the integrated commissioning phase was initiated, powering the RF and high voltage circuits, followed by the first operation in vacuum.
关键词： Installation,Test,Beam source,RF plasma,SPIDER,Commissioning
更新于2025-09-19 17:15:36
-
Study of infrared thermal application for detecting defects within tunnel lining
摘要： With the aging of tunnels, additional maintenance and assessment procedures are required to monitor their working conditions. The passive thermal infrared method, which is a nondestructive contact-free method, is used to find defects in a box-type and shield tunnels with concrete lining. In this study, this method is numerically applied to detect defects in an unhealthy concrete structure. The thermal field data measurements are reviewed and the governing heat transfer mechanisms for a defected concrete surface are presented. The heat transfer in the concrete segment, tunnel air, and the air inside the void due to the conduction, convection, and radiation mechanisms is explained. Further, the type of cavity, the temperature difference between the healthy and unhealthy concrete surfaces, the temperature difference between the tunnel air and concrete surfaces, and the influence of the void depth on the detection accuracy are investigated. The results show that the temperature difference between the concrete surface and the tunnel air is more than 0.35 °C, which is an ideal condition for detecting the voids with an approximate depth of 30 mm or less.
关键词： Hammering test,Heat transfer,Infrared thermography,Defected lining,RC tunnel lining
更新于2025-09-19 17:15:36
-
Photovoltaic Module Reliability || Development of Accelerated Stress Tests
摘要： The chapter discusses the development of accelerated stress tests (ASTs) for photovoltaic (PV) modules to identify and mitigate field failure modes. It outlines various ASTs such as Thermal Cycling, Damp Heat, Humidity Freeze, UV Light Exposure, Static Mechanical Load, Cyclic (Dynamic) Mechanical Load, Reverse Bias Hot Spot Test, Bypass Diode Thermal Test, and Hail Test, detailing their parameters and the failure modes they address. The importance of ASTs in improving module reliability and lifetime is emphasized, along with the challenges in accelerating certain processes without altering the failure mechanisms.
关键词： Reverse Bias Hot Spot Test,UV Light Exposure,Damp Heat,Static Mechanical Load,Hail Test,Thermal Cycling,Photovoltaic Module Reliability,Accelerated Stress Tests,Humidity Freeze,Bypass Diode Thermal Test,Cyclic (Dynamic) Mechanical Load
更新于2025-09-19 17:13:59
-
[IEEE 2018 Conference on Optoelectronic and Microelectronic Materials and Devices (COMMAD) - Perth, Australia (2018.12.9-2018.12.13)] 2018 Conference on Optoelectronic and Microelectronic Materials and Devices (COMMAD) - A new approach to modelling the coherence of optical feedback in dynamical semiconductor laser systems
摘要： This paper proposes a model-based range extension control system for electric vehicles. The proposed system optimizes the front and rear driving–braking force distributions by considering the slip ratio of the wheels and the motor loss. The optimal distribution depends solely on vehicle acceleration and velocity. Therefore, this system is effective not only at constant speeds but also in acceleration and deceleration modes. Bench tests were conducted for more precise evaluation and to realize experimental results with high reproducibility. The effectiveness of the proposed system was verified through field and bench tests.
关键词： Bench test,range extension control system (RECS),electric vehicle (EV),driving and braking force distribution
更新于2025-09-19 17:13:59
-
Improved electro-optic chaotic system with nonlinear electrical coupling
摘要： Design disjunction is developed to offer a broad coverage, high resolution, and low overhead approach to online diagnosis and recovery of recon?gurable fabrics. Design disjunction leverages the condensed diagnosability of T logic resources to achieve self-recovery using partial recon?guration in O(log T ) steps. Recon?guration is guided by the constructive property of f-disjunctness which forms O(log T ) resource groups at design-time. Resolution of f simultaneous resource faults is shown to be guaranteed when the resource groups are mutually f-disjunct. This extends run-time fault resilience to a large resource space with certainty for up to f faults using a decision-free resolution process that also provides a high likelihood of identifying the fault’s location to a ?ne granularity. Finally, design disjunction is parameterized to accommodate the low coverage issue of functional testing for which inarticulate tests can otherwise impair fault isolation. Experimental results for MCNC and ISCAS benchmarks on a Xilinx 7-series ?eld programmable gate array (FPGA) demonstrate f-diagnosability at the individual slice level with a minimum average isolation accuracy of 96:4 percent (94:4 percent) for f ? 1 (f ? 2). Results have also demonstrated millisecond order recovery with a minimum increase of 83:6 percent in fault coverage compared to N-modular redundancy (NMR) schemes. Recovery is achieved while incurring an average critical path delay impact of only 1:49 percent and energy cost roughly comparable to conventional two-MR approaches.
关键词： online test,run-time fault diagnosis and recovery,design space exploration,Recon?gurable logic devices,autonomous fault handling,fault-tolerant systems,?eld programmable gate arrays
更新于2025-09-19 17:13:59
-
[IEEE 2018 Asia Communications and Photonics Conference (ACP) - Hangzhou (2018.10.26-2018.10.29)] 2018 Asia Communications and Photonics Conference (ACP) - Numerical investigation of method combined Doppler effect with multi-beam laser heterodyne for measurement of the small angle
摘要： A method for selecting a graphical model -vector-valued stationary Gaussian time series was recently proposed by Matsuda and uses the Kullback–Leibler divergence measure to define a test statistic. This statistic was used in a backward selection procedure, but the algorithm is prohibitively expensive for large . A high degree of sparsity is not assumed. We show that reformulation in terms of a multiple hypothesis test and simulations support the reduces computation time by the assertion that power levels are attained at least as good as those achieved by Matsuda’s much slower approach. Moreover, the new scheme is readily parallelizable for even greater speed gains.
关键词： multiple hypothesis test,Kullback–Leibler divergence,vector-valued time series,Undirected graph
更新于2025-09-19 17:13:59
-
[IEEE 2019 IEEE International Conference on Computation, Communication and Engineering (ICCCE) - Fujian P.R, China (2019.11.8-2019.11.10)] 2019 IEEE International Conference on Computation, Communication and Engineering (ICCCE) - The IR Drop Effect of 2T1C and 3T1C Driving Modes in Top Emission AMOLED
摘要： The immune system in homo sapiens protects the body against diseases by identifying and attacking foreign pathogens. However, when the system misidenti?es native cells as threats, it results in an auto-immune response. The auto-antibodies generated during this phenomenon may be identi?ed through the indirect immuno?uorescence test. An important constituent process of this test is the automated identi?cation of antigen patterns in the cell images, which is the focus of this research. We perform a detailed literature review and present a framework to automate the identi?cation of antigen patterns. The ef?cacy of the framework, demonstrated on the MIVIA ICPR 2012 HEp-2 Cell Contest and SNP HEp-2 Cell datasets, suggests that the algorithm is comparable with the state-of-the-art approaches.
关键词： anti-nuclear antibody testing,Biomedical imaging,HEp-2 cells,laws texture measure,indirect immuno?uorescence test
更新于2025-09-19 17:13:59
-
Evaluating the interfacial properties of wrinkled graphene fiber through single-fiber fragmentation tests
摘要： Graphene ?ber has attracted much attention due to its potential applications in supercapacitors, dye-sensitized solar cells, actuators, motors, stretchable circuits and functional composites, owing to its high electrical conductivity, tensile strength and good ?exibility. The high tensile strength of graphene ?ber renders it promising candidate as the reinforcement in the composites. The interface is the key element for the ?ber-reinforced composites; however, there is no study about the interfacial evaluation about the graphene ?ber reinforcement composites. Herein, in this study, we fabricate the high-strength graphene ?bers (up to 890.1 MPa) through the wet spinning and thermal annealing method, make the graphene ?ber-reinforced single-?ber composite, and develop a novel and facile fragmentation test to quantitatively evaluate the interfacial performance of graphene ?ber. Graphene ?ber has the interfacial shear stress (IFSS) of 60.6 MPa, exhibiting one of the highest IFSS among the carbon nanotube yarns and commercial carbon ?bers composites. The superior interfacial performance of graphene ?ber is attributed to the surface wrinkles and grooves, which establishes strong physical interlocking between graphene ?ber and resin, favoring for the stress transfer. This work will pave the way for the development of graphene ?ber-reinforced composites.
关键词： Wet spinning,Thermal annealing,Graphene ?ber,Composites,Interfacial properties,Fragmentation test
更新于2025-09-19 17:13:59
-
Sensitive detection of influenza a virus based on a CdSe/CdS/ZnS quantum dot-linked rapid fluorescent immunochromatographic test
摘要： Prevention is the most effective management strategy for influenza A infection in humans. In this study, we developed a CdSe/CdS/ZnS quantum dot (QD) fluorescent dye for rapid and sensitive detection of two common subtypes (H1N1 and H3N2) of influenza A virus, and examined its utility. CdSe/CdS/ZnS QD was conjugated with antibody (Ab) after conjugation with latex, making QD conjugate of QD+Latex+Ab. A stable photoluminescence of QD conjugate and advantage of CdSe/CdS/ZnS QD used was characterized in this study. The performance of a rapid fluorescent immunochromatographic test (FICT) employing QD conjugate (QD-FICT) in detecting influenza A/H1N1 was 8-fold and 64-fold higher than that of a europium nanoparticle-based FICT and a rapid diagnostic test (RDT; Standard Diagnostics BIOLINE Influenza A/B), respectively. For influenza A/H3N2, QD-FICT showed 8-fold and 128-fold higher performance than europium nanoparticle-based FICT and RDT, respectively. In clinical evaluations, QD-FICT showed 93.75% clinical sensitivity [45/48; 95% confidence interval (95% CI): 82.80-98.69], 100% clinical specificity (117/117; 95% CI: 96.90-100.00), and strong correlation (kappa; 0.98) with rRT-PCR (20 ≤ Ct ≤ 40). Europium nanoparticle-linked FICT showed 79.17% clinical sensitivity (38/48; 95% CI: 65.01-89.53) and 100% clinical specificity (117/117; 95% CI: 96.90-100.00), whereas RDT showed 77.08% sensitivity (37/48; 95% CI: 62.69-87.97), 100% specificity (117/117; 95% CI: 96.90-100.00), and reasonably good correlation with rRT-PCR (kappa; 0.93). Water-soluble QDs can therefore be used as an effective material for developing fluorescent diagnostic systems for rapid detection of human influenza A virus in clinical specimens.
关键词： Rapid Fluorescent Immunochromatographic Test,Influenza A Virus,Quantum Dot Fluorescent Dye
更新于2025-09-19 17:13:59