Miracle-dz/UniFAR-FTUs huggingface dataset:
Robust Tuning of Power System Stabilizer Using a Non-iterative Taguchi Design Technique

Abstract This article presents a new non-iterative approach to deal with the problem of robust tuning of power system stabilizers. The proposed approach is based on the Taguchi robust design technique, which aims at optimizing the power system stabilizer parameters while simultaneously reducing the influence of variations in system operating conditions. The robust tuning methodology of a single-stage power system stabilizer for the single-machine infinite-bus system is presented to demonstrate the Taguchi-based approach. The robust power system stabilizer parameters are determined using analysis of means. The robustness of the designed power system stabilizer is tested using no-way analysis of means and time domain simulations.
Improved Unscented Kalman Filter Based on Decimation in Frequency Domain Fast Fourier Transform for Attitude Estimation Applied to Underwater Gliders

In order to estimate the attitude fast and accurately for the underwater glider using the lower cost and lower power underwater navigation system, this paper designs a new underwater navigation system which is made up of the inertial sensors aided the magnetometer and proposes an improved unscented Kalman filter based on decimation in frequency domain fast Fourier transform (UKF-DF). UKF-DF makes better use of the estimate advantage of UKF in the nonlinear system, and in this basis DIF-FFT is integrated into UKF to increase the speed of calculation. Therefore, the attitude of a glider can be estimated fast and accurately. The real vehicle experiment is done to assess the performance of the proposed UKF-DF algorithm, the experimental results show that the attitude convergence of UKF-DF is better than EKF (extended Kalman filter) and the attitude estimated by UKF-DF is more precise than EKF.
Static calibration methodology for weigh-in-motion systems

A weigh-in-motion (WIM) static calibration methodology is described and demonstrated. The calibration procedure quantifies WIM response variation across the width of WIM sensors. A simple methodology is described to track wheel path location across a WIM system. With knowledge of WIM sensitivity variation across sensor width, along with wheel trajectory location, this methodology offers the possibility of improvement in WIM system performance. The specific WIM system studied was shown to be minimally affected by temperature and results suggest improvements in installation technique. This static calibration methodology complements, but does not replace, typical WIM dynamic calibration requirements.
The characteristic analysis of opened print slot antenna using FDTD

In this Letter, we analyzed a cross‐shaped‐fed opened print slot antenna using FDTD method. The VSWR, radiation patterns of this configuration are presented. The measured bandwidth of the proposed antenna is ∼ 86.1% (2.0 ≥ VSWR). The radiation pattern null of opened (etched ground plane) slot exhibited a much better than not‐opened (not etching ground plane) slot at the high frequency band. Offset and other design parameters of the antenna lead to the good impedance matching in a wide frequency band. The proposed open antenna obtained not only wide‐band but also good radiation patterns characteristics. This antenna may be applied for mobile system, WBAN, Home network, Biomedical instruments, and other wireless communication systems. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2459–2461, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25504
Elimination of kink phenomena and drain current hysteresis in InP-based HEMTs with a direct ohmic structure

We eliminated kink phenomena and Ids hysteresis in a double-doped InP-based HEMT without degrading its frequency performance by fabricating direct ohmic contacts in the InGaAs channel. A direct ohmic structure lets us control current paths in the device and relax the electric field at the recess edge of the drain side. As a result, we can suppress impact ionization and decrease the hole currents that originate from the high electric field region at the recess edge of the drain side. Kink phenomena are eliminated in the direct ohmic structure. We also suggest a hole trap mechanism to explain the appearance of hysteresis in the I-V characteristic of the conventional nonalloyed ohmic structure device.
63. A New Perspective for Identifying Potential Cardiac Sensitizers

Abstract : Cardiac sensitization is the sensitization of the heart to circulating catecholamines after exposure to an exogenous chemical, such that sudden alarm or exercise may precipitate a cardiac arrest. The purpose of this investigation is to develop a predictive mathematical model that can identify cardiac sensitizers. The dog and the swine were used as surrogates for the human. Physiologic and electrocardiographic measurements were taken during the control period and after each dose of ouabain, a digitalis glycoside known to provoke ventricular arrhythmia. Logistic regression was used to develop the model by converting binary data into a function (curve/equation) that can estimate of the probability of a particular result, in this case experiencing a cardiac arrhythmia. Five parameters were significant predictors of arrhythmia in dog (HR, PQ, QT, Paos and dP/dt(sub max)), and three were significant in the swine (PQ, QT and dP/dt(sub max)). The study demonstrates that several mathematical models can be constructed to predict the onset of ouabain induced arrhythmia, in both the dog and the swine, and that there are similarities in the two animal models. Efforts to reduce the number of parameters to a single term showed colinearity among simple pair wise combinations. Since the QT interval was significant in both species, it appears to be the most promising of all the parameters for predicting cardiac sensitization.
Long-term optical reliability and lifetime predictability of double clad fibers

With the use of fiber lasers pervading diverse applications and environmental conditions, the long-term reliability of low index (LI) polymer coated double-clad (DC) fibers used for this purpose is significant. Mechanical reliability standards for 125um fibers are well established by Telcordia GR-20-CORE requirements and some work1 has been published investigating optical reliability of DC fibers with specially engineered coatings with respect to accelerated temperature and humidity aging. While these are helpful in providing a figure of merit to the optical reliability of LI fluoroacrylate coatings, it becomes important to decouple the effects of temperature and humidity in order to understand the underlying degradation mechanisms of LI polymers in various storage and operating environments. This paper identifies the effects of temperature and humidity on the spectral attenuation of DC fibers and presents a reliability model capable of predicting lifetimes under prolonged exposure to typical temperature and humidity conditions experienced during storage and operation of fiber lasers.
Cheering my friends up: The unique role of Interpersonal emotion regulation strategies in social competence

A systematic investigation has been lacking regarding children’s deliberate regulation of others’ emotions which is labeled interpersonal emotion regulation (ER). Based on a theoretically derived model of Interpersonal Affect Classification, we examined children’s interpersonal ER strategy use in the peer group. Participants were 398 fourth and fifth grade children from the Midwestern United States. Children rated themselves regarding their use of intrapersonal and interpersonal ER strategies as well as attention to friends’ emotions. Teacher-report and peer nominations were used to assess social competence regarding prosocial behavior and emotion sharing. Awareness of and attention to friends’ emotions were positively and more strongly associated with interpersonal ER than intrapersonal ER. Children reported affective engagement most strongly followed by humor, cognitive engagement, and attention to improve friends’ feelings. Among the four interpersonal ER strategies, only affective engagement was uniquely associated with social competence; intrapersonal ER was not associated with social competence. The findings support the significance of broadening the focus of ER to the interpersonal domain to promote the development of children’s ER and social competence.
Dielectric resonator-based multiple-input multiple-output antennas and channel characteristic analysis

The authors report in this study, the investigation of propagation channel characteristics for multiple-input multiple-output (MIMO) systems based on polarisation diversity realised using dual-port dielectric resonator antennas (DRAs). The channel matrix entries in terms of complex transmission scattering parameters are measured directly from compact single-structure DRAs with multiple polarised ports and low mutual coupling in indoor wireless environment to calculate the complementary cumulative distribution functions (CCDFs) for channel capacity. Characterisation using theoretical expressions for MIMO capacity is demonstrated by spectral efficiency and eigenanalysis CCDFs from simulation and measurements based on dual-polarised cylindrical DRAs for a 2×2 MIMO system.
Document-Oriented Data Organization for Unmanned Aerial Vehicle Outputs

Three-Dimensional (3D) point cloud is considered an important geospatial resource for a vast range of applications. This is due to the rapid technology on data acquisition, such as Unmanned Aerial Vehicle (UAV), Mobile Laser Scanning, and Terrestrial Laser Scanning (TLS). Yet efforts to exploit the use of these datasets are increasingly threatened by the massive dataset, data density, and data complexity. Traditional Relational Database Management System (RDBMS) existed years ago, but the capability of relational databases in handling these issues is questionable due to several drawbacks and limitations. To address these challenges, effective storage, querying, and organization is required. Document-oriented databases are becoming more prominent compared to relational database, since it is capable of handling petabytes of data emerging from the Big Data scheme. Thus, this study investigates the capability of the document-oriented database in organizing UAV outputs, such as images and point clouds, via a NoSQL database. There are 103,996,984-point clouds generated from UAV images and stored in the database. Several tests, such as time analysis, insert operation, and storage consumption, are performed and compared with the RDBMS. The results show that the document-oriented database outperforms the relational database during data retrieval, where the document-oriented database response is 37% faster than the relational database. Meanwhile for data updating, the document-oriented database response is 30% faster than a relational database. To retrieve the stored point cloud in the database, the Potree viewer is used to render the data on the web browser. Based on the result, the point cloud data is successfully rendered and can be manipulated for future applications.
Polymeric Multimode Interference Mach–Zehnder Interferometer Electro-Optic Switch Using Embedded Coplanar Waveguide Electrode: Theory, Design, and Analysis

Abstract The self-imaging theory is improved for designing a polymer multimode interference Mach–Zehnder interferometer electro-optic switch. The electro-optic overlap factor is enhanced from 0.6510 to 0.9658 through adopting an embedded coplanar waveguide electrode. Considering the mode dispersion effect, formulations of time-domain response are derived, and switching characteristics are analyzed. The total device length is about 7.175 mm, the switching voltage is 2.622 V, and the switching time is 29.90 ps. The lightwave 3-dB bandwidth is 20 nm, the insertion loss is less than 2.70 dB, and the crosstalk under cross and bar states are less than −55 dB and −45 dB, respectively.
Predictive Ability of European Heart Surgery Risk Assessment System II (EuroSCORE II) and the Society of Thoracic Surgeons (STS) Score for in-Hospital and Medium-Term Mortality of Patients Undergoing Coronary Artery Bypass Grafting

Objective To evaluate the powers of European Heart Surgery Risk Assessment System II (EuroSCORE II) and the Society of Thoracic Surgeons (STS) score in predicting in-hospital and medium-term mortality of patients undergoing coronary artery bypass grafting (CABG). Methods Totally 1628 Chinese patients were included between January 2000 and January 2018. Their perioperative clinical data were collected and the patients were closely followed up. According to the length of follow-up time, the total cohort was divided into 1-year, 2-year, 3-year, 4-year and 5-year groups. The in-hospital and medium-term risk prediction of EuroSCORE II and STS score were comparatively assessed by calibration, discrimination, decision curve analysis (DCA), net reclassification index (NRI), integrated discrimination improvement (IDI) and Bland-Altman analysis. Results About 36 (2.21%) patients died during hospitalization. Both EuroSCORE II and STS score performed extremely well in predicting in-hospital mortality (area under curve = 0.900 and 0.879, respectively). However, calibration and discrimination analyses showed gradual decrease when these two risk evaluation systems were used to predict mortality during the follow-up period. At the same time, the predictive ability of EuroSCORE II was better than STS score. DCA curves showed that the performances of the two evaluation systems were roughly equal between the threshold probability of 0% to 20%. The percentage of correct reclassification of EuroSCORE II was 21.64% higher than that of STS score in predicting 2-year postoperative mortality. The IDI index showed that the predictive capabilities of these two systems were roughly equivalent. Bland-Altman analysis showed no significant difference between the values of the two systems. Conclusion EuroSCORE II and STS score have excellent predictive powers in predicting in-hospital mortality of patients undergoing CABG. In particular, EuroSCORE II is superior in calibration and discrimination. The prediction efficiency of the two risk evaluation systems is still acceptable for two-year postoperative mortality, but decreases year by year.
Exploring the Causal Relationship between Exposure to the 1994 Northridge Earthquake and Pre- and Post-Earthquake Preparedness Activities

Whether, when, and why individuals prepare for disasters are major concerns of disaster preparedness researchers. Using population-based survey data collected after the 1994 Northridge earthquake, multinomial logistic models are imposed to examine if preparedness activities were adopted after the quake because of quake-related financial loss, physical and emotional injury, and proximity to the earthquake epicenter and shaking. The extent to which people invest in sustained preparedness was also examined by comparing the preparedness activities occurring both before and after the earthquake. The results indicated that exposure to physical, financial, and emotional injuries, and to shaking increased post-quake preparedness. Engaging in certain types of pre-quake preparedness increased the likelihood of post-quake preparedness. Post-quake preparedness is not affected by socioeconomic status or demographic factors, except that married persons are more likely to prepare in all situations and immigrants are more likely to adopt post-quake preparedness activities.
A MULTIBODY DYNAMICS BENCHMARK ON THE EQUATIONS OF MOTION OF AN UNCONTROLLED BICYCLE

In this paper we present the linearized equations of motion for a bicycle as a benchmark. The results obtained by pencil-and-paper and two programs are compared. The bicycle model we consider here consists of four rigid bodies, viz. a rear frame, a front frame being the front fork and handlebar assembly, a rear wheel and a front wheel, which are connected by revolute joints. The contact between the knife-edge wheels and the flat level surface is modelled by holonomic constraints in the normal direction and by non-holonomic constraints in the longitudinal and lateral directions. The rider is rigidly attached to the rear frame with hands free from the handlebar. This system has three degrees of freedom: the roll, the steer, and the forward speed. For the benchmark we consider the linearized equations for small perturbations of the upright steady forward motion. The entries of the matrices of these equations form the basis for comparison. Three different kinds of methods to obtain the results are compared: penciland-paper, the numeric multibody dynamics program SPACAR, and the symbolic software system AutoSim. Because the results of the three methods agree within the machine round-off error, we assume that the results are correct and can be used as a bicycle dynamics benchmark.
A Vehicle Monitoring System Based on STeCEQL

The vehicle monitoring system is a very important class of information systems. However, the existing monitoring systems generally require the support of the large database systems and the monitoring event could not be processed in real time. The research of internet of vehicles has proposed the novel ideas and methods to build the monitoring system. In this paper, we construct a vehicle monitoring system based on a complex event query language: STeCEQL. Firstly, we give the approach of verifying the reasonableness of the monitoring events through building the model of the vehicles. Then we propose the method of describe the vehicle monitoring events by STeCEQL. Meanwhile, we give the complex event detection algorithms based on the event tree. Finally, the simulation results demonstrate the effectiveness of the vehicle monitoring approach of internet of vehicles.
Evaluation of scattering parameters, gain, and feedback‐capacitance‐dependent noise performance of a pseudomorphic high‐electron‐mobility transistor

This paper evaluates microwave performance in terms of scattering parameters and gains and presents the effect of gate‐to‐drain capacitance Cgd on the noise behavior of a pseudomorphic high‐electron mobility transistor (PHEMT). An analytical expression for Cgd is obtained and the influence of gate length, epilayer thickness, and gate and drain bias upon this PHEMT is studied. Analytically calculated small‐signal parameters are used to evaluate the intrinsic and extrinsic scattering parameters and gains of the PHEMT. Finally, the dependence of bias and frequency on minimum noise figure, scattering parameters, and gains is studied. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 47: 51–57, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21079
Determinants of Knowledge-Sharing Intentions for Shared Decision-Making Platforms

ABSTRACT With patient decision aids (PDAs) to evaluate all available care options and weigh patients’ preferences against evidence-based medicine, medical personnel and patients can make health-related decisions together. However, little research has been conducted on the critical determinants of medical personnel’s intentions to share knowledge with one another within their organization to develop PDAs. This study has developed a socio-technical integrated model to explain medical personnel’s intentions to share knowledge for the development of PDAs. This study employed a field survey in Taiwan to collect data. 421 valid questionnaires were completed for the statistical analysis. The results indicate that social network, social trust, perceived usefulness, compatibility, result demonstrability, and image have positive effects on knowledge-sharing intentions. Social network has a positive influence on shared goals, and ease of use has a positive impact on perceived usefulness. These findings provide valuable insights for medical informatics practices in promoting shared medical decision making.
SUNFLOWER METHYL ESTER AS A FUEL FOR AUTOMOBILE DIESEL ENGINES

This article presents the results of an investigation carried out in an automobile diesel engine running on sunflower oil methyl ester (SME), pure and mixed with diesel fuel. Engine test bench studies have been carried out, with the aim of obtaining comparative measures of torque, power, specific fuel consumption, and emission of pollutants, to evaluate and compare the behavior of a diesel engine running on SME or SME with diesel fuel.
Make automatic power source transfers a success for your plant

A systematic approach is presented to analyze the effects of power source transfers on the operation of process plants. Various solutions and guidelines are presented to improve the effectiveness of power transfers. The solutions range from a methodology to analyze and desensitize a plant to a sophisticated high speed auto-synchronizing transfer system. The approach and solutions are based on two and three breaker open-loop (standby "ready to close") transfer schemes. Normally closed tie breaker transfer systems are not included in the scope of this paper.
Power added efficiency optimisation of microwave transistor amplifier

A high-efficiency microwave amplifier design routine which optimises the power added efficiency of any class (A, AB, B, C, D, E,. . .) of amplifier is reported. It has the advantage of a reduced variable number, and easy synthesis for input-output circuits. A heterojunction bipolar transistor amplifier at 1 GHz for mobile telephone applications has been optimised using this routine. The simulation result shows 71% of power added efficiency under class C operation. >
Ultralow-noise programmable voltage source

To avoid introducing additional noise sources while making low-frequency noise measurements, batteries are normally used instead of electronic power supplies. This paper presents an alternative solution by describing the design, construction, and testing of an ultralow-noise voltage source. Such a power supply can be computer controlled and has a typical noise level two orders of magnitude below that of similar commercial instruments. Some typical values of the spectral density of the voltage fluctuations at its output are: (10/sup -12/, 10/sup -15/, 10/sup -16/) V/sup 2//Hz at (0.01, 0.1, and 1) Hz, respectively. These noise performances are almost independent of the supplied current, with a degradation of less than 3 dB up to 400 mA. A special algorithm for digital-to-analog conversion, using passive devices with 1% tolerance, ensures a resolution of 2.5 mV and an accuracy better than /spl plusmn/1.5 mV over the entire output range from 0 to 8 V.
SIW-Based Low Phase-Noise Millimeter-Wave Planar Dual-Port Voltage-Controlled Oscillator

Abstract In this paper, a low phase-noise millimeter-wave planar dual-port voltage-controlled oscillator (VCO) using a novel electronically tunable substrate integrated waveguide (SIW) resonator is proposed. The VCO operates in the Ka- and E-band simultaneously. At the fundamental-wave port, the VCO achieves a tuning rang of more than 120MHz by varying the varactor tuning voltage from 0 to 11V, spurious output less than −40 dBc, and a phase-noise of −114.7 dBc/Hz at 1MHz offset from 32 GHz carrier frequency. Meanwhile, at the harmonic port, a tuning rang of more than 240MHz around 64GHz carrier frequency is achieved. The measured output power varies from 6.04 to 8.75 dBm and 7.2 to 9.46 dBm within the fundamental-wave and second harmonic tuning ranges, respectively. This type of low phase-noise planar dual-port VCO is very suitable for millimeter-wave applications in high stable phase-locked sources or FMCW radars.