Calibration Workshop Research Articles

NSGA-III-Based Production Scheduling Optimization Algorithm for Pressure Sensor Calibration Workshop

NSGA-III-Based Production Scheduling Optimization Algorithm for Pressure Sensor Calibration Workshop

Research and application of OPC UA-based digital twin smoke alarm calibration workshop information model.

Aiming at the problems of data integration and information sharing in the calibration workshop of smoke alarm, combining OPC Unified Architecture (OPC UA) and digital twin technology, the OPC UA based digital twin smoke alarm calibration workshop information network framework is proposed. Using OPC UA information modeling technology, a digital workshop information model for smoke alarm calibration was constructed, and the static attribute set, process attribute set, and functional component set of the workshop were defined in detail. Taking the smoke box as an example, the information model construction was instantiated, and data collection and transmission were carried out with the digital twin model of the smoke box, achieving the implementation mapping between the twin model and physical entities. The results show that based on the proposed OPC UA information model, the interconnection and intercommunication of data at all levels of the digital twin smoke alarm calibration workshop can be achieved, and the workshop can be visualized, digitized, and flexible.

Interexaminer reliability of the German version of the DC/TMD.

Verification of the interrater reliability of axis I diagnoses of the German version of the DC/TMD. The hypothesis was that the DC/TMD protocol yields comparable results, if examiner instructions are closely followed. A culturally equivalent German translation of the DC/TMD was developed. During a 1-day calibration workshop at the University of Heidelberg, three examiners were trained by the DC/TMD Training and Calibration Center. According to the calibration guidelines, 16 models (11 cases, five non-cases) were examined by four experienced TMD specialists. Reliability was calculated with reference to the reference standard examiner as percentage agreement and kappa coefficients for DC/TMD diagnoses and intraclass correlation coefficients (ICCs) for findings. Excellent reliability was achieved for the diagnoses myalgia, myofascial pain with referral, arthralgia, headache attributed to TMD, disc displacement (DD) with reduction, DD without reduction without limited opening (κ=0.85…1.00). Degenerative joint disease was diagnosed with substantial agreement (κ=0.64), DD with reduction with intermittent locking and DD without reduction with limited opening were not present in our sample. Overall percentage agreement was 94%-100% for all diagnoses. The German version of the DC/TMD shows very good reliability and can be recommended for the use in clinical and research settings.

「圧力スケール」 （５） 高圧地球科学における多数アンビル装置の圧力校正

Accurate characterization of the pressure and temperature environment in high-pressure apparatuses is of essential importance when we apply laboratory data to the study of the Earth's interior. Difficulties in pressure determination of multi-anvil apparatuses are summarized. The First International Pressure Calibration Workshop is briefly reported with the Preliminary International Pressure Scale (PIPS-97). Some prospects on the pressure scale at high-temperatures for the multi-anvil apparatuses are discussed.

Report on the First International Pressure Calibration Workshop.

The First International Pressure Calibration Workshop was held at Misasa, Japan on August 22-23, 1997. Sixty seven scientists, representing the diamond anvil and multianvil communities from six countries, attended. Thirty seven papers were presented in three oral sessions titled, Equations of state and the absolute pressue scale, Multianvil calibration, and Diamond anvil and other studies and eight papers were presented as posters. In a final discussion period, it was decided too publish a multi-authored paper describing the Preliminary International Pressure Scale (PIPS-97). It was decided that this scale should contain consensus pressure calibration phase transitions at room temperature, equations for well-characterized phase transitions at high temperatures and pressures, and the equations of state for NaCl, Au, and MgO.

Determination of Differential Mobility Analyzer Transfer Functions Using Identical Instruments in Series

The differential mobility analyzer (DMA) is an important tool for determining particle size distributions. The physical performance of a DMA is quantified by the concept of the transfer function. Therefore, knowledge of the transfer function is important to interpret the mobility distributions recorded by a DMA. During a calibration workshop in preparation for the Aerosol Characterization Experiment 1 (ACE1) field campaign, the transfer functions of five types of different mobility analyzers (Vienna-type DMA short, medium, and long, CIT radial, and TSI long; CIT = California Institute of Technology, Pasadena, CA; TST = TSI Inc., St. Paul, MN) were experimentally characterized by height, width, and area of their transfer functions. Different particles size ranges between 3 and 200 nm were investigated. The transfer function was determined by scanning a DMA across the mobility distribution produced by another, identical DMA. Subsequently, the data were processed by a deconvolution algorithm assuming a triangular shape for the transfer function. For all DMA types, the area of the transfer function decreased with particle size, especially for ultrafine particles (d_p < 20 nm). The gradient with which this area decreases with particle size, however, is different for each of the DMA types investigated. The calibration provides an improved description of the performance of each DMA, particularly in the ultrafine size range.

Intercomparison Study of the Size-Dependent Counting Efficiency of 26 Condensation Particle Counters

ABSTRACT Particle detection efficiency curves for 26 condensation particle counters were determined during a calibration workshop in preparation for the Aerosol Characterization Experiment 1 (ACE1). Three different types of commercially available particle counters, the ultrafine condensation particle counter (TSI-3025) and the condensation particle counters (TSI-3010 and TSI-3760 or TS1-7610) were investigated at default temperature and flow settings as well as for other flow rates and temperature differences between the saturator and the condenser. Furthermore, the pulse-height-analysis ultrafine condensation particle counter and a TSI-3010 modified to achieve a higher temperature difference were calibrated. In this study, the large number of particle counters investigated provided the opportunity to obtain a more statistically significant picture of the performance of different particle counters for different operating conditions.

Program of the American Meteorological Society's Weather Radar Calibration Workshop, November 4–8, 1974, Norman, Okla.

program of the American Meteorological Society's Weather Radar Calibration Workshop, November 4–8, 1974, Norman, Okla.