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... In-situ quantification of particle concentration during the combustion of solid fuel powders is of importance for analyzing their combustion behaviors. Digital holography (DH) is applied here for studying iron powder combustion at high concentration. The performance of DH as a function of particle concentration is thoroughly studied with synthetic holograms. The detection efficiency is found to be ...
... With the increasing number of DC microgrids, DC microgrid clusters are emerging as a cost-effective solution. Therefore, due to the possible long distances between DC microgrids, once a fault occurs and is cleared, it should be located. Especially, locating high impedance faults (HIFs) is challenging. With communication-free fault locating methods, implementation costs can be reduced, and noise an ...
... Efficiency of four different calibration techniques was evaluated on 50 pesticides in tea matrix by LC-MS/MS. Further statistical testing by MANOVA, T-tests as well as PCA indicates that calibration techniques have a significant effect on the efficiency of the analytical method to counteract the matrix effects and provide the best accuracy in the quantification. Matrix effects exceeding 20% for mo ...
calibration, etc ; RNA; functional diversity; molecular dynamics; Show all 4 Subjects
Abstract:
... RNA is critical to a broad spectrum of biological and viral processes. This functional diversity is a result of their dynamic nature; the variety of three-dimensional structures that they can fold into; and a host of post-transcriptional chemical modifications. While there are many experimental techniques to study the structural dynamics of biomolecules, molecular dynamics simulations (MDS) play a ...
calibration, etc ; Bayesian theory; gravity; surveys; topography; China; Show all 6 Subjects
Abstract:
... The latest gravity survey of the gravity base network in Qinghai Province, China, was conducted with six Scintrex CG gravimeters and this gravity survey was tied to existed gravity reference stations. In this gravity network with long segments and very rugged topography, the calibration of scale factors is a time-consuming progress and its accuracy may be affected by many uncertainties, and the ch ...
calibration, etc ; absorption; gasoline; liquids; polytetrafluoroethylene; spectroscopy; sulfur; Show all 7 Subjects
Abstract:
... In this work, a method for total sulphur determination in automotive gasoline using dried matrix spot sampling is proposed. The method is based on the deposition of the sample on a cellulose-based filter paper and subsequent sulphur quantification via CS diatomic molecule using high-resolution continuum source graphite furnace molecular absorption spectrometry (HR-CS GF MAS). The sample deposition ...
calibration, etc ; algorithms; dissolved oxygen; luminescence; oxygen; seawater; Show all 6 Subjects
Abstract:
... Oxygen sensors based on luminescence quenching are the most commonly used instruments for in situ measurement in seawater due to their accuracy and long-term stability. The calibration method of the sensor is crucial for their accuracy. Conventional methods exhibit some defects, such as strict control of calibration conditions and cumbersome and time-consuming operation. To improve calibration ope ...
calibration, etc ; energy; friction; gravel; models; sand; technology; vibration; Show all 8 Subjects
Abstract:
... The parameters of wet sand and gravel particles with different shapes are calibrated based on JKR contact model. The results reveal that surface energy and rolling friction coefficient are the significant factors affecting the tangent of repose angle, indicating the great influence on the simulation accuracy of wet sand and gravel particles during vibration screening. In addition, the tangent of r ...
calibration, etc ; Biological Sciences; algorithms; apples; models; prediction; technology; Show all 7 Subjects
Abstract:
... Calibration transfer is an important step for practical applications of Visible and Near-infrared (Vis/NIR) instruments, making the developed model transferable and avoiding recalibration. A calibration transfer method between two developed portable Vis/NIR devices (master and slave devices) for predicting soluble solids content (SSC) of apples was investigated in this study. The partial least squ ...
calibration, etc ; databases; mathematical models; photometry; regression analysis; telemetry; Show all 6 Subjects
Abstract:
... With the continuously growing city size and the increasingly complex and changeable light environment in the city, remote sensing and ground-measured technologies have certain limitations in the research of urban night light environment. The ground-measured data are accurate but low in efficiency and small in scale, while the night-light remote sensing data have the characteristics of high accurac ...
calibration, etc ; autocorrelation; case studies; models; prediction; regression analysis; urbanization; Show all 7 Subjects
Abstract:
... Urban systems are featured by spatial autocorrelation, which may produce clustering of model residuals when simulating urban expansion using cellular automata (CA). Accurate identification of spatial autocorrelation and reduction of residual clustering are essential to accurate CA modeling of urban expansion. We developed a new CA approach (CASEM) using a spatial error model (SEM) that incorporate ...
calibration, etc ; atomic absorption spectrometry; leaves; models; prediction; soybeans; sugarcane; Show all 7 Subjects
Abstract:
... This study aims to develop a single calibration model to determine nutrient elements directly (Ca, Mg, Mn, and P) in soybean and sugar cane leaf samples by double pulse laser-induced breakdown spectroscopy (DP LIBS). Matrix-matching calibration (MMC) was evaluated using direct and inverse models. Forty-five samples were used to build the calibration model (23 soybean leaves and 22 sugar cane leave ...
calibration, etc ; cameras; deformation; geometry; global positioning systems; models; vision; Show all 7 Subjects
Abstract:
... Image-based displacement measurement techniques are widely used for sensing the deformation of structures, and plays an increasing role in structural health monitoring owing to its benefit of non-contacting. In this study, a non-overlapping dual camera measurement model with the aid of global navigation satellite system (GNSS) is proposed to sense the three-dimensional (3D) displacements of high-r ...
calibration, etc ; Pinus taeda; equations; forest inventory; models; trees; Brazil; Show all 7 Subjects
Abstract:
... The modeling of the taper and shape of the tree stem is of great interest to forest managers and can be carried out using different approaches. The objective of this study was to improve the accuracy of taper modeling, considering a methodology that combines generalization and calibration with an upper-stem diameter. An experiment was conducted with stands of Pinus taeda from southern Brazil that ...
calibration, etc ; analytical chemistry; nanogold; particle size; particle size distribution; uncertainty; Show all 6 Subjects
Abstract:
... Single particle inductively coupled plasma-mass spectrometry (spICP-MS) is an emerging technique that is capable of simultaneous measurement of the size and number concentration of metal-containing nanoparticles (NPs) at environmentally relevant levels. Although spICP-MS is widely applied to different fields, challenges remain in obtaining accurate and consistent particle number concentration (PNC ...
calibration, etc ; flood control; mathematical models; model validation; rain; urban runoff; China; Show all 7 Subjects
Abstract:
... Urban floods are a common urban disaster that threaten the economy and development of cities. Sponge cities can improve flood resistance ability and reduce floods by setting low-impact development measures (LID). Evaluating flood reduction benefits is the basic link in the construction of sponge cities. Therefore, it is of great significance to evaluate the benefits of sponge cities from the persp ...
calibration, etc ; equipment; irradiation; manufacturing; neutrons; polytetrafluoroethylene; quality control; radioactivity; viability; Utah; Show all 10 Subjects
Abstract:
... Here we present a new method of irradiating ¹³⁴Xe capsules to produce ¹³⁵Xe gas standards which maximize the ratio of ¹³⁵Xe to ¹³³Xe production due to (n,g) and (n,2n) reactions, respectively. We performed “Spectral tuning” of the University of Utah TRIGA Reactor (UUTR) neutron spectrum to increase the length of time that ¹³⁵Xe dominates undesirable ¹³⁵Xe in the sample, so that the capsules – used ...
calibration, etc ; analytical chemistry; biomarkers; blood serum; cell communication; detection limit; exosomes; fluorescence; Show all 8 Subjects
Abstract:
... Cancer-cell-derived exosomes are regarded as noninvasive biomarkers for early cancer diagnosis because of their critical roles in intercellular communication and molecular exchange. A robust aptamer-initiated catalytic hairpin assembly (AICHA) fluorescence assay is proposed for universal, sensitive detection of cancer-derived exosomes. The AICHA was verified with the specific detection of MCF-7 ce ...
calibration, etc ; analytical chemistry; atomic absorption spectrometry; fractionation; isotope dilution technique; quantitative analysis; Show all 6 Subjects
Abstract:
... Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) has attracted attentions for its high sensitivity and sufficient spatial resolution in the in-situ analysis and imaging in biological studies. However, due to the matrix effect and elemental fractionation, achieving quantitative analysis of elements or proteins in biological samples are still challenging. Calibration is a nece ...
calibration, etc ; beers; food chemistry; liquid chromatography; malt; mass spectrometry; mycotoxins; water solubility; Show all 8 Subjects
Abstract:
... Enniatins (ENA, ENA1, ENB and ENB1) are emerging mycotoxins reported in malt used for brewing. This study aimed to assess the fate of ENA, ENA1, ENB and ENB1 throughout Ale beer brewing using a validated method based on matrix-matched calibration (MMC) and liquid chromatography with quadrupole time-of-flight mass spectrometry detection. MMC avoided the inaccurate quantification of all enniatins, s ...