Miracle-dz/UniFAR-FTUs huggingface dataset:
Electromagnetic Bandgap Structure by Low Temperature Co-Fired Ceramics Technology

A EBG（Electromagnetic Bandgap） structure was prepared based on the theory of the high impedance surface photonic crystal and the HFSS emulating results. The measurement result showed that the bandgap of the EBG structure was in the Ultra Wideband range. The designed structure was fabricated by a method of low temperature co-fired ceramics technology（LTCC） using ceramics as the matrix and silver as the coils. The micro-structure was analyzed by microscope and scanning electron microscope which showed that these two kinds of materials were well connected. A bandgap between 4GHz~5.5GHz was found by the Vector Network Analyzer which was accord to the emulation.
PERFORMANCE ANALYSIS OF A SINGLE-PHASE AC VOLTAGE CONTROLLER UNDER INDUCTION MOTOR LOAD

An AC voltage controller is a device that is used to accomplish continuous variation of the rotor speed and rotational force, or torque of an electric motor and the major component of the device are two thyristors connected in an inverse-parallel manner. So, thyristors applications are now rapidly expanding in the field of industrial automation because they are found to consume very little power whenever they are employed to manipulate the flow of electric power. The performance characteristics of thyristorized inverse parallel controller (IPC) under a single-phase induction motor load are presented in this paper. The thyristorized IPC or AC voltage controller is chosen as a cheaper and easier to build controller for induction machines and many more applications such as; induction heating and dimmer. This could save installation and maintenance costs for industries where many variable speed drives are in use. The induction motor stator voltage control is achieved via phase angle control of the AC supply. Performance evaluation of the controller with the motor under different delay angles is demonstrated. Due to nonsinusoidal nature of the controller output voltage, the level of ripples and harmonic contents is studied. As a result of half-wave symmetry in the stator voltage, only odd harmonics is considered in the Fourier based analysis used to investigate the control limits of the controller. MATLAB 7.8 software has been used to simulate the system and its results are compared with the experimental results obtained the laboratory prototype which is found to correlate.
Low-Rank Tensor Optimization With Nonlocal Plug-and-Play Regularizers for Snapshot Compressive Imaging

The increasing volume of hyperspectral images (HSIs) brings great challenges to storage and transmission. Recently, snapshot compressive imaging (SCI), which compresses 3-D HSIs into 2-D measurements, has received increasing attention. Since the original HSIs can be naturally represented as third-order tensors, in this work, we reformulate the degradation model in the SCI systems as a tensor-based form, which friendly allows us to explore the underlying low-rank tensor structure of HSIs. To address the ill-posed SCI reconstruction problem, we suggest a global low-rank tensor optimization model with nonlocal plug-and-play (PnP) regularizers (GNLR) to reconstruct the HSI from the 2-D measurement, which flexibly and collaboratively integrates three-directional tensor nuclear norm (3DTNN) and two implicit nonlocal regularizers. More concretely, 3DTNN characterizes the global correlation of the underlying HSIs. Two implicit regularizers under the PnP framework exploit the benefits of the transformed sparse and low-rank priors on similar patches of the coefficient tensor, respectively. Based on the alternating direction method of multipliers algorithm, we develop an efficient algorithm to tackle the proposed model. Extensive experiments on remotely sensed HSIs and real-world HSIs demonstrate the superiority of the proposed GNLR method.
Erbium-doped optical fiber amplifiers pumped in the 660- and 820-nm bands

State-of-the-art erbium (Er)-doped optical fiber amplifiers (EDFA's) pumped in the 660- and 820-nm bands are described. We have demonstrated highly efficient EDFA's incorporating optimized 664- and 827-nm pump wavelengths and an Er-doped high numerical aperture (NA) fiber with thermally diffused expanded core (TEC) fiber ends. Gain coefficients of 3.8 and 1.3 dB/mW at respective wavelengths of 664 and 827 nm were achieved at a signal wavelength of 1535 nm. Noise figures of 3.1 and 4.1 dB at respective pump wavelengths of 670 and 827 nm were obtained at a signal wavelength of 1535 nm. A highly efficient Er-doped fiber amplifier module, in which an AlGaInP visible laser diode (LD) was used as the pump source, was successfully developed as a practical application of this technology. A maximum overall gain coefficient of 3.0 dB/mW was achieved at a signal wavelength of 1535 nm. The EDFA module realized a maximum overall signal gain of 33 dB at 1535 nm with a saturated output power of -1 dBm. A maximum saturated output power of 3.9 dBm was obtained at a signal wavelength of 1552 nm. The present EDFA design using a low-cost laser diode for optical disk memory use and a high NA Er-doped fiber has great potential for providing inexpensive, high-performance EDFA's. >
Chinese Medical Injections for Acute Exacerbation of Chronic Obstructive Pulmonary Disease: A Network Meta-analysis

Background The World Health Organization has indicated that chronic obstructive pulmonary disease (COPD) may become the third leading cause of death by 2030. Acute exacerbation of COPD (AECOPD) is an important process in clinical treatment. Recent studies have shown that Chinese medical injections (CMI) are effective against AECOPD, but the effective difference among different CMIs remains unclear. The aim of this network meta-analysis (NMA) is to compare the therapeutic effect of various CMIs. Methods We conducted an overall, systematic literature search in the China National Knowledge Infrastructure, Wanfang, VIP, SinoMed, PubMed, Embase, Cochrane Library, and Web of Science databases to retrieve randomized controlled trials (RCTs) of CMIs for AECOPD published up to January 2021. The Cochrane risk of bias tool was used to assess the risk of bias. Stata 13.1 and WinBUGS 14.3 were used for data analyses. Results In total, 103 RCTs involving 8767 participants and 23 CMIs were included. The results indicated that among all treatments conventional Western medical therapy (WM) plus Dengzhanxixin injection (DZXX) led to the best improvement in the clinical efficacy and the ratio of forced expiratory volume in one second (FEV1) to forced vital capacity (FVC) (FEV1/FVC), with surface under the cumulative ranking curve (SUCRA)=80.47% and 98.55%, respectively. Moreover, Shenmai injection (SM) plus WM and Reduning injection (RDN) plus WM led to the best improvement in the FEV1 (SUCRA=80.18%) and the ratio of forced expiratory volume in one second to the predicted value (FEV1%, SUCRA=87.28%). Shengmai injection (SGM) plus WM led to the most considerable shortening in the length of hospital stay (SUCRA=94.70%). Cluster analysis revealed that WM+DZXX had the most favorable response for clinical efficacy and FEV1, as well as clinical efficacy and FEV1/FVC, WM+RDN had the most favorable response for clinical efficacy and FEV1%, WM+SGM had the most favorable response for clinical efficacy and length of hospital stay. Conclusion WM+DZXX, WM+RDN, and WM+SGM were noted to be the optimum treatment regimens for improving in clinical efficacy, FEV1, FEV1/FVC, FEV1% and reducing the hospital stay length of AECOPD patients. Considering the limitations this NMA may have, the current results warrant further verification via additional high-quality studies.
Managing hospitalized patients with a COPD exacerbation: the role of hospitalists and the multidisciplinary team

ABSTRACT Exacerbations of chronic obstructive pulmonary disease (COPD) are associated with high rates of hospitalizations, costs, and morbidity. Therefore, hospitalists and the multidisciplinary team (hospital team) need to take a proactive approach to ensure patients are effectively managed from hospital admission to postdischarge. Comprehensive screening and diagnostic testing of patients at admission will enable an accurate diagnosis of COPD exacerbations, and severity, as well as other factors that may impact the length of hospital stay. Depending on the exacerbation severity and cause, pharmacotherapies may include short-acting bronchodilators, systemic corticosteroids, and antibiotics. Oxygen and/or ventilatory support may benefit patients with demonstrable hypoxemia. In preparation for discharge, the hospital team should ensure that patients receive the appropriate maintenance therapy, are counseled on their medications including inhalation devices, and proactively discuss smoking cessation and vaccinations. For follow-up, effective communication can be achieved by transferring discharge summaries to the primary care physician via an inpatient case manager. An inpatient case manager can support both the hospitalist and the patient in scheduling follow-up appointments, sending patient reminders, and confirming that a first outpatient visit has occurred. A PubMed search (prior to 26 January 2021) was conducted using terms such as: COPD, exacerbation, hospitalization. This narrative review focuses on the challenges the hospital team encounters in achieving optimal outcomes in the management of patients with COPD exacerbations. Additionally, we propose a novel simplified algorithm that may help the hospital team to be more proactive in the diagnosis and management of patients with COPD exacerbations.
Novel automated optimization of power MOSFET for 12V input, high-frequency DC-DC converter

In order to achieve the best trade off between the cost and performance of the power MOSFET in the application of 12V step-down input DC-DC converter, it is important to do the device optimization efficiently. This paper identifies the target function and related variables. Then, different optimization algorithms are compared. In addition, design examples are presented based on the proposed optimization procedure.
Using a Multiple-Model Adaptive Estimator in a Random Evasion Missile/Aircraft Encounter

The terminal phase (end game)of an encounter between an air-to-air missileequipped with an activemonopulse radar seeker and an evading e ghter aircraft, possibly employing electronic countermeasures in the form of electronic jinking, is addressed. The missile uses a guidance law derived from linear differential game theory, which is implemented by using a multiple-model adaptiveestimator (MMAE). TheMMAE identie es theevasion strategy of theaircraft, which consists of thecombination of evasion maneuverand electronic jinking. An extensivenumerical study is used to demonstrate the viability of the concept. In comparison with a previously proposed mixed strategy guidance methodology, the new MMAE-based approach leads to a substantial improvement in the guaranteed single-shot kill probability for the missile. ODERN air-to-air missiles, designed to intercept highly maneuverable aircraft equipped with electronic countermeasures (ECM), have to operate in a highly uncertain environment. This paper is concerned with the terminal phase (end game) of an encounter between a missile equipped with an active monopulse radar seeker and an evading e ghter aircraft having the option to use ECM. The terminal homing phase of the interception starts when the active seeker of the missile locks on its target, generating also a warning signal (including some threat identie cation ) in the aircraft. This warning is the only information the pilot has. At the moment when the warning is received, the pilot starts to execute a sequence ofperiodicalevasivemaneuvers.Simultaneously,toenhanceitssur
Demagnetisation state of permanent magnets in large output power permanent magnet synchronous motor

This paper describes the design of a large output power permanent magnet synchronous motor with radial flux distribution. In this paper, two different permanent magnet motor configurations were analysed. Numerical calculations of motor characteristics were performed with a two-dimensional finite element, time-stepping simulation program. The results are presented and the advantages and disadvantages of each rotor construction are discussed.
Multilayer metallic filters for Q/V band IMUX

Abstract Current designs of space IMUX filters are based on dual-mode circular waveguide cavities, on dielectric resonators or, at the lower end of the frequency spectrum, on coaxial resonators. This paper presents a new kind of IMUX filter aimed at high operating frequencies (Ka, Q, and V bands) which was developed in the frame of an ESA funded study named KALOS-DEVAQ. The new filter implements a quasi-elliptic frequency response and is characterized by simple geometry. The mechanical structure is composed of stacked metallic plates and it is well suited to be manufactured, at a low cost, with high accuracy. Despite the lower unloaded Q factor, the new configuration allows achieving a comparable flatness of insertion loss and group delay, thanks to the application of the pre-distortion technique. The increased insertion loss does not affect the system performances because it can be compensated by the amplification stages in the RF chain.
Application of associative memory neural networks to the control of a switched reluctance motor

The application of an associative memory neural network to the problem of torque ripple minimisation in a switched reluctance motor is presented. Conventional techniques for torque linearisation and decoupling are reviewed, after which the application of neural techniques to the problem is described. An instrumented test rig based around a 4 kW IGBT converter and a four phase switched reluctance motor has been constructed. Results obtained experimentally and by simulation demonstrate the effectiveness of the approach. The neural network has been implemented using both digital signal processor and field programmable gate array technologies. <<ETX>>
Promoting Creators Intentions: Measurement of Crowdfunding Performance

Crowdfunding is an activity to collect small amounts of funds from a large audience via the internet without involving a financing intermediary. This study aims to determine the effect of fundraising, product testing, relationship reliability, and awareness-raising on the performance of the crowdfunding platform as an alternative source of business or business funding. This research was conducted using a quantitative approach, where Google forms were distributed to 267 project proponents, owners, or administrators in ASEAN countries as a sample and 197 sets of questionnaires were returned with complete answers and further analyzed. The data analysis used includes descriptive analysis, Pearson correlation, and multiple linear regression analysis. The results of this study indicate that all independent variables, namely the creator's intention in the form of fundraising, product testing, relationship reliability, and awareness-raising, have a positive and significant influence on the performance of the crowdfunding platform. This has practical implications that the creator's intention must be a concern for project proponents and fund owners who invest or distribute their funds in addition to paying attention to the business proposal and the reliability of the crowdfunding platform operator.
Compact QCL driver for free-space transmitter

The paper presents investigations of a free space optical transmitter operating with quantum cascade lasers. The main goal of the research was to determine inﬂuence of lasers driver parameters on an optical data link performance. Using some commercial driving devices, the laser pulse limitations of power, repetition rate and time duration have been observed. In the paper, the preliminary results of the designed laser driver are described. The driver was developed at the Institute of Optoelectronics, MUT in cooperation with scientists from the Faculty Electrical Engineering, WUT. It is characterized by high current eﬃciency, high pulse repetition rate, and compact construction. Additionally, the driver also includes a controller of Peltier modules.
Simple models for predicting transmission properties of photonic crystal fibers

Simple, fast, and efficient 1D models for evaluating the transmission properties of photonic crystal fibers are proposed. Using these models, axial propagation constant, chromatic dispersion, effective area, and leakage loss can be predicted with a reasonable accuracy but much faster than often time‐consuming 2D analytical and numerical techniques and with much less computational resources. It is shown that the results are in good agreement with the published data available in the literature. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1286–1290, 2006; Published online in Wiley InterScience (www. interscience.wiley.com). DOI 10.1002/mop.21624
Injection-locked avalanche diode oscillator FM receiver

An injection-locked-oscillator FM receiver has been built in X-band waveguide using an avalanche diode oscillator. Measurements of the output voltage as a function of peak frequency deviation of the input signal were made and compared with theoretical values. Good agreement between theoretical and measured performance indicates that the avalanche diode is adequately described by the van der Pol model and that linear broad-band performance can be expected of the receiver.
Detection of organoleptic faults in wine by microwave sensor coupled with molecularly imprinted silica

This paper presents a microwave liquid sensor enabling an accurate quantification of chemical species at trace levels in complex liquid. Previously, dedicated to pesticide detection (ng/L), this work is devoted to organoleptic faults in wine production. Based on microstrip technology, the shape of the microwave sensor is a trapezoidal spiral. The sensor pattern is a multiresonant microstrip circuit. Each molecularly imprinted silica (MIS) is specifically synthesized to detect a marker of wine defect. Here, two markers of oxidation in white wine are tested. The first marker is the phenylacetaldehyde which triggers a mixed flavor of age, honey and overblown rose (<20 μg/L in wine). The second marker is 1-octen-3-one which mushroom and earthy off-flavors (< 100 ng/L in wine). The coupling between the circuit and the MIS demonstrates how the sensor can detect these chemical species in a common concentration range in French wine.
A new efficiency low mass bi-directional battery discharge-charge regulator for low voltage batteries

Since the policies of the space agencies are focused on the development of smaller satellites, it is becoming more and more important the save of volume and mass in the necessary satellite equipment. Due to this need, the authors introduce a bi-directional battery discharge-charge regulator for low voltage batteries that reaches these new goals and besides which has high efficiency.
Low Dietary n6/n3 Ratio Attenuates Changes in the NRF 2 Gene Expression, Lipid Peroxidation, and Inflammatory Markers Induced by Fructose Overconsumption in the Rat Abdominal Adipose Tissue

The objective of this study was to examine the benefits of different n6/n3 polyunsaturated fatty acid ratios on the lipid metabolism, insulin resistance, and oxidative stress in the adipose tissue of rats fed a high-fructose diet. Male and female rats were divided into four groups: a control group (CON) (n6/n3 ratio ~7), a high-fructose group (HF) (n6/n3 ratio ~7), an N6-HF group (n6/n3 ratio ~50), and the DHA-HF group (n6/n3 ratio ~1, with the addition of docosahexaenoic (DHA) and eicosapentaenoic (EPA) acid). The CON group received plain water and the HF group received 15% fructose in their drinking water. Fructose induced an increase in the content of serum triglycerides, serum cholesterol, and HOMA-IR index. Among the fatty acids, elevated proportions of C18:1n9 and C16:1n7, as well as an increase in total monounsaturated fatty acid (MUFA), were found in the adipose tissue of the HF group. Fructose treatment also changed oxidative parameters, including a marked increase in the serum malondialdehyde (MDA) content. Meanwhile, DHA supplementation caused a significant decrease in the serum MDA concentration in comparison with the HF group. In addition, DHA/EPA supplementation attenuated oxidative stress by increasing NRF 2 gene expression. Fructose treatment also significantly decreased the adiponectin level, while DHA supplementation ameliorated it. The changes observed in this trial, including the decrease in the content of DHA and EPA, the decreased EPA/ARA ratio, and the increase in the expression of inflammatory genes, are characteristics of the low-grade inflammation caused by fructose treatment. These changes in the rat adipose tissue could be prevented by dietary intervention consisting of DHA supplementation and a low n6/n3 ratio.
Measurement of Soft Tissue Deformation to Improve the Accuracy of a Body-Mounted Motion Sensor

Skin deformation caused by muscle motion is a common source of error for body-mounted sensors. A new method of measuring joint angles using a combination of two-axial accelerometers and reaction force sensors is presented. In this study, the effect of soft tissue deformation was minimized using a new reaction force sensor that is bound onto the body segment. The force sensor was designed using a pressure-sensitive electric conductive rubber. A Fourier transform of the total pressure forces induced by the body-mounted motion sensor modules was implemented to analyze the frequency property of soft tissue deformation on the human body surface. We processed the data of two-axial accelerations measured by the accelerometers using the measurements of soft tissue deformation including the total pressure force and twodirectional coordinates of the center of pressure. An experimental study with ten subjects was implemented to verify the new sensor system proposed for estimating the joint angle of the knee. The effectiveness of this system is illustrated by the experimental results using an optical motion analysis system as a reference. If we use the accelerometers alone, the root mean square (RMS) difference and the coefficient of multiple correlation (CMC) over all the subjects walking at each of the three speeds (slow, average, and fast) are 6.31. 4 deg and 0.930. 05, 6.91. 7 deg and 0.920. 03, and 8.32. 0 deg and 0.890. 03, respectively. If we compensate for soft tissue deformation using the surface pressure measurements, the RMS difference and the CMC in each of the three conditions are 4.71. 1 deg and 0.960. 04, 5.01. 5 deg and 0.960. 04, and 6.61. 9 deg and 0.930. 03, respectively. Measurement results of the developed sensor system showed high correlation with results from two alternative methods including an optical motion analysis system and the goniometer system in walking analysis experiments. The results support the effectiveness of the proposed method in the measurement of the flexion and extension angle of the knee. The compensation for soft tissue deformation using the surface pressure measurements improved the accuracy of the body-mounted sensor in the experiments. DOI: 10.1115/1.3212558
CMOS-circuit degradation analysis using optical measurement of the substrate current

This paper analyzes the photon emission under AC operation caused by hot carriers in MOSFET's, and determines the lifetime of CMOS circuits by means of a direct photon count measurement that replaces the traditional electrical measurement of the substrate current. This is made possible by the linear relation between the substrate current and the photon count at about 830 nm for all operating values of gate voltage. The paper presents an application of this method to monitor the long term degradation of the delay time of CMOS inverters and highlights the advantages of this noninvasive technique which can therefore be used to predict the lifetime also of devices in which the substrate current cannot be measured directly, as in SOI devices.