DESIGN OF AN IN SITU DETECTION SYSTEM FOR LASER HARDENED WIDTH

2011 ◽  
Author(s):  
CAIXIA YANG ◽  
JICHANG LIU
Keyword(s):  
Detection System ◽  
In Situ Detection

scholarly journals Real Time In-situ Detection System Research for Methane in Offshore Shallow Gas based on Thin Film Interface

2018 ◽  
Vol 232 ◽  
pp. 04053
Author(s):  
Cheng-xing Miao ◽  
Qing Li ◽  
Sheng-yao Jia
Keyword(s):  
Real Time ◽  
Detection Efficiency ◽  
Detection System ◽  
Detection Methods ◽  
Shallow Gas ◽  
Micro Gas Sensor ◽  
Detection Probe ◽  
On Line ◽  
In Situ Detection

In order to get ridded of the non real-time detection methods of artificial site sampled and laboratory instrument analyzed in the field of methane detection in the offshore shallow gas, real-time in-situ detection system for methane in offshore shallow gas was designed by the film interface.The methane in the offshore shallow gas through the gas-liquid separation membrane of polymer permeation into the system internal detection probe, analog infrared micro gas sensor sensed the methane concentration and the corresponded output value, data acquisition and communication node fitted into standard gas concentration.Based on the experimental data compared with the traditional detection method, and further analyzed the causes of error produced by the case experiment. The application results show that the system can achieve a single borehole layout, long-term on-line in-situ on-line detection, and improve the detection efficiency and the timeliness of the detection data.

Multiple Phage-Based Magnetoelastic Biosensors System for the Detection of Salmonella typhimurium and Bacillus anthracis Spores

2008 ◽  
Vol 1129 ◽  
Author(s):  
S. Huang ◽  
S. Li ◽  
H. Yang ◽  
M. L. Johnson ◽  
Ramji S Lakshmanan ◽  
...  
Keyword(s):  
Resonance Frequency ◽  
Rapid Detection ◽  
Detection System ◽  
Additional Mass ◽  
Response Curves ◽  
Biosensor System ◽  
Bacillus Anthracis Spores ◽  
In Situ Detection ◽  
Multiple Pathogens

AbstractThis paper presents a multiple magnetoelastic (ME) biosensor system for in-situ detection of S. typhimurium and B. anthracis spores in a flowing bacterial/spore suspension (5 x 101 - 5 x 108 cfu/ml). The ME biosensor was formed by immobilizing filamentous phage (specific to each detection target) on the ME platforms. An alternating magnetic field was used to resonate the ME biosensor to determine its resonance frequency. When cells/spores are bound to a ME biosensor surface, the additional mass of the cells/spores causes a decrease in the resonance frequency of the biosensor. The detection system was composed of a control sensor, an E2 phage-based biosensor (specific to S. typhimurium) and a JRB7 phage-based biosensor (specific to B. anthracis spores). The frequency response curves of the ME biosensors as a function of exposure time were then measured and the detection limit of the ME biosensor was observed to be 5 x 103 cfu/ml. The results show that phage-based ME biosensors can detect multiple pathogens simultaneously and offer good performance, including good sensitivity and rapid detection.

An autonomous in situ detection system for radioactivity measurements in the marine environment

2008 ◽  
Vol 66 (10) ◽  
pp. 1419-1426 ◽  
Author(s):  
C. Tsabaris ◽  
C. Bagatelas ◽  
Th. Dakladas ◽  
C.T. Papadopoulos ◽  
R. Vlastou ◽  
...  
Keyword(s):  
Marine Environment ◽  
Detection System ◽  
In Situ Detection ◽  
Radioactivity Measurements

scholarly journals Machine-Learning Assisted Discrimination of Precancerous and Cancerous from Healthy Oral Tissue Based on Multispectral Autofluorescence Lifetime Imaging Endoscopy

Cancers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 4751
Author(s):  
Elvis Duran-Sierra ◽  
Shuna Cheng ◽  
Rodrigo Cuenca ◽  
Beena Ahmed ◽  
Jim Ji ◽  
...  
Keyword(s):  
Machine Learning ◽  
Detection System ◽  
Characteristic Curve ◽  
Oral Epithelial Dysplasia ◽  
Lifetime Imaging ◽  
Clinical Center ◽  
Oral Tissue ◽  
In Situ Detection ◽  
Oral Epithelial

Multispectral autofluorescence lifetime imaging (maFLIM) can be used to clinically image a plurality of metabolic and biochemical autofluorescence biomarkers of oral epithelial dysplasia and cancer. This study tested the hypothesis that maFLIM-derived autofluorescence biomarkers can be used in machine-learning (ML) models to discriminate dysplastic and cancerous from healthy oral tissue. Clinical widefield maFLIM endoscopy imaging of cancerous and dysplastic oral lesions was performed at two clinical centers. Endoscopic maFLIM images from 34 patients acquired at one of the clinical centers were used to optimize ML models for automated discrimination of dysplastic and cancerous from healthy oral tissue. A computer-aided detection system was developed and applied to a set of endoscopic maFLIM images from 23 patients acquired at the other clinical center, and its performance was quantified in terms of the area under the receiver operating characteristic curve (ROC-AUC). Discrimination of dysplastic and cancerous from healthy oral tissue was achieved with an ROC-AUC of 0.81. This study demonstrates the capabilities of widefield maFLIM endoscopy to clinically image autofluorescence biomarkers that can be used in ML models to discriminate dysplastic and cancerous from healthy oral tissue. Widefield maFLIM endoscopy thus holds potential for automated in situ detection of oral dysplasia and cancer.

scholarly journals Integrated and Portable Probe Based on Functional Plastic Scintillator for Detection of Radioactive Cesium

2021 ◽  
Vol 11 (11) ◽  
pp. 5210
Author(s):  
Sujung Min ◽  
Hara Kang ◽  
Bumkyung Seo ◽  
Changhyun Roh ◽  
Sangbum Hong ◽  
...  
Keyword(s):  
Plastic Scintillator ◽  
Detection Efficiency ◽  
Direct Detection ◽  
Detection System ◽  
Light Yield ◽  
Radioactive Cesium ◽  
Radiological Measurement ◽  
Measurement Experiment ◽  
In Situ Detection

The highly reliable and direct detection of radioactive cesium has gained potential interest due to in-situ detection and monitoring in environments. In this study, we elucidated an integrated and portable probe based on functional plastic scintillator for detection of radioactive cesium. A functional plastic scintillator with improved detection efficiency was fabricated including CdTe (cadmium telluride) material. Monolith-typed functional plastic scintillator having a diameter of 50 mm and a thickness of 30 mm was manufactured by adding 2,5-diphenyloxazole (PPO, 0.4 wt%), 1,4 di[2-(5phenyloxazolyl)]benzene (POPOP, 0.01 wt%), and CdTe (0.2 wt%) materials in a styrene-based matrix. To evaluate the applicability of the plastic scintillator manufactured to in-situ radiological measurement, an integrated plastic detection system was created, and the measurement experiment was performed using the Cs-137 radiation source. Additionally, detection efficiency was compared with a commercial plastic scintillator. As results, the efficiency and light yield of a functional plastic scintillator including CdTe were higher than a commercial plastic scintillator. Furthermore, the remarkable performance of the functional plastic scintillator was confirmed through comparative analysis with Monte Carlo simulation.

Development of In Situ SAXS Detection System for the Pre-Oxidation and Carbonization of PAN Precursor

2012 ◽  
Vol 217-219 ◽  
pp. 2618-2622
Author(s):  
Kuan Yu ◽  
Bo Zhu
Keyword(s):  
Synchrotron Radiation ◽  
Detection System ◽  
Structural Evolution ◽  
Beam Line ◽  
Servo Control ◽  
Tension Control ◽  
Shanghai Synchrotron Radiation Facility ◽  
In Situ Detection ◽  
Pan Fibers

We designed an in-situ detection system suitable for Shanghai Synchrotron Radiation Facility. The system integrates remote control, temperature control, high-precision servo control and tension control technology, and can dynamically track the microstructure evolution of PAN precursor in the pre-oxidation and carbonization process using SAXS technology. The system has been put into use at the beam line BL16B1 at Shanghai Synchrotron Radiation Facility to investigate the structural evolution of PAN fibers with different drafting tension, temperature and atmosphere.

High performance Nanogold™-in situ hybridzation and its use in the detection of hybridized and PCR-amplified microscopical preparations

1996 ◽  
Vol 54 ◽  
pp. 896-897
Author(s):  
G. W. Hacker ◽  
I. Zehbe ◽  
J. Hainfeld ◽  
A.-H. Graf ◽  
C. Hauser-Kronberger ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Messenger Rna ◽  
High Performance ◽  
Detection System ◽  
Direct Methods ◽  
Genetic Alterations ◽  
Chain Reaction ◽  
Protein Encoding ◽  
Polymerase Chain

In situ hybridization (ISH) with biotin-labeled probes is increasingly used in histology, histopathology and molecular biology, to detect genetic nucleic acid sequences of interest, such as viruses, genetic alterations and peptide-/protein-encoding messenger RNA (mRNA). In situ polymerase chain reaction (PCR) (PCR in situ hybridization = PISH) and the new in situ self-sustained sequence replication-based amplification (3SR) method even allow the detection of single copies of DNA or RNA in cytological and histological material. However, there is a number of considerable problems with the in situ PCR methods available today: False positives due to mis-priming of DNA breakdown products contained in several types of cells causing non-specific incorporation of label in direct methods, and re-diffusion artefacts of amplicons into previously negative cells have been observed. To avoid these problems, super-sensitive ISH procedures can be used, and it is well known that the sensitivity and outcome of these methods partially depend on the detection system used.

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