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In-orbit calibration and validation of atmospheric correction microwave radiometer on HY-2A satellite

Wang Zhenzhan,Zhang Dehai,Zhao Jin and Li Yun

Strategic Study of CAE 2013, Volume 15, Issue 7, Pages 44-52

Abstract: After discussion and analysis on thermal vacuum calibration method of ACMR, microwave transfer functions

Keywords： HY-2A ACMR calibration and validation

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FY-3A/MWHS data calibration and validation analysis

Gu Songyan,Wang Zhenzhan,Li Jing,Zhang Shengwei and Zhang Li

Strategic Study of CAE 2013, Volume 15, Issue 7, Pages 92-100

Abstract:

In this paper, the method for FY-3A/MWHS calibration in-orbit has beenRadiometric calibration of FY-3A/MWHS on orbit has been performed based on the T/V test results and surfaceIt is confirmed that the system of radiometric calibration for MWHS is successful, and performs wellDue to the accuracy of the nonlinearity parameters, the radiance calibration of MWHS agrees well withThe method of calibration and validation for FY-3A/MWHS will be a good demo for the other passive microwave

Keywords： FY-3A microwave radiometer calibration and validation receiver non-linearity

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Numerical modelling of reinforced concrete flexural members strengthened using textile reinforced mortars

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4, Pages 649-668 doi: 10.1007/s11709-023-0919-4

Abstract: Externally bonded (EB) and near-surface mounted (NSM) bonding are two widely adopted and researched strengthening methods for reinforced-concrete structures. EB composite substrates are easy to reach and repair using appropriate surface treatments, whereas NSM techniques can be easily applied to the soffit and concrete member sides. The EB bonded fiber-reinforced polymer (FRP) technique has a significant drawback: combustibility, which calls for external protective agents, and textile reinforced mortar (TRM), a class of EB composites that is non-combustible and provides a similar functionality to any EB FRP-strengthened substrate. This study employs a finite element analysis technique to investigate the failing failure of carbon textile reinforced mortar (CTRM)-strengthened reinforced concrete beams. The principal objective of this numerical study was to develop a finite element model and validate a set of experimental data in existing literature. A set of seven beams was modelled and calibrated to obtain concrete damage plasticity (CDP) parameters. The predicted results, which were in the form of load versus deflection, load versus rebar strain, tensile damage, and compressive damage patterns, were in good agreement with the experimental data. Moreover, a parametric study was conducted to verify the applicability of the numerical model and study various influencing factors such as the concrete strength, internal reinforcement, textile roving spacing, and externally-applied load span. The ultimate load and deflection of the predicted finite element results had a coefficient of variation (COV) of 6.02% and 5.7%, respectively. A strain-based numerical comparison with known methods was then conducted to investigate the debonding mechanism. The developed finite element model can be applied and tailored further to explore similar TRM-strengthened beams undergoing debonding, and the preventive measures can be sought to avoid premature debonding.

Keywords： reinforced polymer textile reinforced mortar finite element analysis concrete damage plasticity calibrationand validation parametric study

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Test-driven verification/validation of model transformations

László LENGYEL,Hassan CHARAF

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 2, Pages 85-97 doi: 10.1631/FITEE.1400111

Abstract: In this way, verification/validation methods can guarantee different requirements stated by the actualtransformation verified/validated, discusses the different scenarios of model transformation verification and validationFurthermore, we collect and discuss the actual open issues in the field of verification/validation of

Keywords： Graph rewriting based model transformations Verification/validation Test-driven verification

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Model validation for structural dynamics in the aero-engine design process

Chaoping ZANG, D. J. EWINS,

Frontiers in Energy 2009, Volume 3, Issue 4, Pages 480-488 doi: 10.1007/s11708-009-0043-8

Abstract: A model validation technique in structural dynamics and its application in aero-engine development isThe concept and the approaches of model validation based on reference data supplied from experimentalAn aero-engine component is used as an example to demonstrate the validation using the experimental testA satisfactory agreement with both approaches is achieved, and finally, a strategy of model validation

Keywords： model validation aero-engine structural dynamics

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Stiffness analysis and experimental validation of robotic systems

Giuseppe CARBONE

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2, Pages 182-196 doi: 10.1007/s11465-011-0221-3

Abstract: engineering feasibility of both the proposed numerical formulation for stiffness analysis and experimental validation

Keywords： robotics stiffness performance numerical and experimental estimations

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Innate immune checkpoint Siglec10 in cancers: mining of comprehensive omics data and validation in patient

Frontiers of Medicine 2022, Volume 16, Issue 4, Pages 596-609 doi: 10.1007/s11684-021-0868-z

Abstract: Sialic acid binding Ig-like lectin 10 (Siglec10) is a member of innate immune checkpoints that inhibits the activation of immune cells through the interaction with its ligand CD24 on tumor cells. Here, by analyzing public databases containing 64 517 patients of 33 cancer types, we found that the expression of Siglec10 was altered in 18 types of cancers and was associated with the clinical outcomes of 11 cancer types. In particular, Siglec10 was upregulated in patients with kidney renal clear cell carcinoma (KIRC) and was inversely associated with the prognosis of the patients. In 131 KIRC patients of our settings, Siglec10 was elevated in the tumor tissues of 83 (63.4%) patients compared with that in their counterpart normal kidney tissues. Moreover, higher level of Siglec10 was associated with advanced disease (stages III and IV) and worse prognosis. Silencing of CD24 in KIRC cells significantly increased the number of Siglec10-expressing macrophages phagocytosing KIRC cells. In addition, luciferase activity assays suggested that Siglec10 was a potential target of the transcription factors c-FOS and GATA1, which were identified by data mining. These results demonstrate that Siglec10 may have important oncogenic functions in KIRC, and represents a novel target for the development of immunotherapies.

Keywords： innate immune checkpoint Siglec10 kidney renal clear cell carcinoma

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Development of a novel hand−eye calibration for intuitive control of minimally invasive surgical robot

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0698-y

Abstract: Obtaining the transformation with respect to the laparoscope and robot slave arm frames using hand−eye calibrationWe proposed a novel two-step modified dual quaternion for hand−eye calibration in this study.The dual quaternion was exploited to solve the hand−eye calibration simultaneously and powered by anThe obtained hand−eye calibration result was applied to the intuitive control by using the hand−eye coordinationResults demonstrate this method can improve the calibration accuracy.

Keywords： minimally invasive surgery hand−eye calibration intuitive control surgical robot dual quaternion

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Development of an onsite calibration device forrobot manipulators Research Article

Ziwei WAN, Chunlin ZHOU, Haotian ZHANG, Jun WU

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 2, Pages 217-230 doi: 10.1631/FITEE.2200172

Abstract: During the calibration procedure, the robot manipulator first moves automatically to multiple end-effectorThe relative mounting positions are accurately measured and used as prior information to improve calibrationThe results of theoretical analysis indicate that MultiCal reduces calibration accuracy by 10% to 20%The results of a calibration experiment conducted on a Staubli TX90 robot show that MultiCal has only7% to 14% lower calibration accuracy compared to a measuring arm with a laser scanner, and 21% to 30%

Keywords： Calibration device Kinematic calibration Onsite calibration Absolute accuracy

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Model validation and application

Rongrong ZHANG,Chesheng ZHAN,Xiaomeng SONG,Baolin LIU

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 6, Pages 1025-1035 doi: 10.1007/s11783-014-0655-z

Abstract: In the third step, the data from an experimental landfill site is used for a pilot-scale validation.Further field-scale validation is finished. The results are satisfactory.

Keywords： environmental multimedia modelling system fuzzy-set approach application model validation uncertainty

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Remote calibration system for frequency based on in-place benchmark

Xiaobin HONG, Guixiong LIU, Zhuokui WU, Xipeng DU,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3, Pages 316-321 doi: 10.1007/s11465-010-0021-1

Abstract: According to the deficiencies of remote calibration mode based on material object reference, a new modelof a remote calibration system for frequency based on in-place benchmark is introduced, which is madeof a calibration subsystem on the spot and a remote management subsystem.The key technology of some key problems for the remote calibration system is particularly discussed,a phase method, frequency division based on dual high-frequency phase locked loop (PLL), and remote calibration

Keywords： remote calibration in-place benchmark frequency comparison global position system (GPS)

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Water pumping analysis and experimental validation of beach well infiltration intake system in a seawater

Huan ZHANG,Shu LIU,Xuejing ZHENG,Gaofeng CHEN

Frontiers in Energy 2015, Volume 9, Issue 3, Pages 335-342 doi: 10.1007/s11708-015-0365-7

Abstract: Based on energy conservation equation and Darcy’s law, a model of beach well infiltration intake system applied in a seawater source heat pump system was established. The model consists of the seawater seepage and the heat transfer process. A porous medium model in a software named FLUENT was applied to simulate the seepage and the heat transfer process. This model was also validated by field experiment conducted on the seashore in Tianjin, China. The maximum relative error between simulation results and experimental results was 2.1% (less than 5%), which was acceptable in engineering application. The porosity and coefficient of thermal conductivity of the aquifer soil were determined to be 0.49 W/(m·K) and 1.46 W/(m·K), respectively in the simulation. In addition, the influencing factors of pumping water of beach well were also analyzed. The pumping water was found to increase when the distance between the beach well and the impervious boundary becomes longer, when the distance between the beach well and the supplying water source shortens, when the diameter of the beach well enlarges, and the drawdown enlarges.

Keywords： water pumping analysis experimental validation infiltration intake system seawater source heat pump

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Reliability prediction and its validation for nuclear power units in service

Jinyuan SHI,Yong WANG

Frontiers in Energy 2016, Volume 10, Issue 4, Pages 479-488 doi: 10.1007/s11708-016-0425-7

Abstract: In this paper a novel method for reliability prediction and validation of nuclear power units in service

Keywords： nuclear power units in service reliability reliability prediction equivalent availability factors

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Ultrasound-guided prostate percutaneous intervention robot system and calibration by informative particle

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 1, Pages 3-3 doi: 10.1007/s11465-021-0659-x

Abstract: By applying the calibration method, a reasonable, reliable forward kinematic model is built, and the

Keywords： ultrasound image guidance prostate percutaneous intervention parallel robot kinematics identification particle swarm optimization informative value

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Assessment and validation of liquid breakup models for high-pressure dense diesel sprays

Yi REN,Xianguo LI

Frontiers in Energy 2016, Volume 10, Issue 2, Pages 164-175 doi: 10.1007/s11708-016-0407-9

Abstract: Liquid breakup in fuel spray and atomization significantly affects the consequent mixture formation, combustion behavior, and emission formation processes in a direct injection diesel engine. In this paper, different models for liquid breakup processes in high-pressure dense diesel sprays and its impact on multi-dimensional diesel engine simulation have been evaluated against experimental observations, along with the influence of the liquid breakup models and the sensitivity of model parameters on diesel sprays and diesel engine simulations. It is found that the modified Kelvin-Helmholtz (KH)–Rayleigh-Taylor (RT) breakup model gives the most reasonable predicted results in both engine simulation and high-pressure diesel spray simulation. For the standard KH-RT model, the model constant for the breakup length has a significant effect on the predictability of the model, and a fixed value of the constant cannot provide a satisfactory result for different operation conditions. The Taylor-analogy-breakup (TAB) based models and the RT model do not provide reasonable predictions for the characteristics of high-pressure sprays and simulated engine performance and emissions.

Keywords： breakup model diesel engine high-pressure injection simulations