Abstract The infection of SARS-CoV-2 has triggered Covid-19 pandemic. In addition to the fever and respiratory symptoms in process coronavirus infections, gastrointestinal symptoms, especially diarrhea, are prominent features its acute long COVID. associations between lung large intestine have been demonstrated by Western medicine at aspects such as tissue origin, microflora homeostasis, mucosal immunity, renin-angiotensin system (RAS) autonomic nervous well, which considered evidence...

In line with encountering the world emergence of vaccine-resistance variants SARS-CoV-2, 15,669,529 samples that received COVID-19 vaccines until April 2023 were investigated as two doses in first phase and booster vaccinations second phase. The analysis shows D614G P681 mutations occurred both phases. E484 Y655 significantly emerged during 762-889 254-381 regions are revealed conserved parts could be considered vaccine design. Kruskal–Wallis test a significant reduction single between...

Summary In this study, we propose and develop a streamline approach for inferring field-scale effective permeability distributions based on dynamic production data including producer water-cut curve, well pressures, rates. The streamline-based inverse simplifies the history-matching process significantly. basic idea is to relate curve at water breakthrough of individual streamlines. By adjusting along streamlines, time each that reproduces reference fractional-flow found. Then modification...

Aiming at the multi-motor coordinated control of intelligent robots, cross-coupling ring based on fuzzy theory (CRCF) is proposed. Each motor cross-coupled with two adjacent motors to form a network structure that eliminates lag in speed tracking between and enhances synchronization motors. Applying proposed strategy, error change are used as input controller, its output second The controller achieves real-time adjustment controllability observability strategy verified by theorem Kalman...

Fuzzy control and PID are often used in area. In recent years, a brushless DC motor (BLDCM) because of their good performance low maintenance costs more widely applied. Along with its program is also rapid development. However, single or can not satisfy the need rising complexity precision systems. this paper, proposed model based on speed scheme, use voltage equation torque adjust parameters to achieve control. With principle fuzzy parameters, according changes adjusted online, has made...

In traditional fault diagnosis methods in power systems, it is difficult to accurately classify and predict the types of faults. With emergence big data technology, classification prediction based on analysis processing have been applied systems. To make more accurate, this paper proposes a hybrid mining method for system clustering, association rules stochastic gradient descent. This uses three-layer model: The first layer K-means clustering algorithm preprocess original source, use...

The Convolutional Neural Network (CNN) is one of the widely used deep learning models that offers chance to boost farming productivity through autonomous inference field conditions. In this paper, CNN connected a Support Vector Machine (SVM) form new model CNN-SVM; chosen are ResNet-50 and VGG16 CNN-SVM formed ResNet-50-SVM VGG16-SVM. method consists two parts: for feature extraction SVM classification. This paper uses public multi-class weeds dataset DeepWeeds training testing. proposed...

The exoskeleton robot is a comprehensive technology that combination of sensing, control and information. Based on the upper limb rehabilitation device (ULERD), this paper describes novel hand mechanism for using in field aiming at helping varieties hemiparalysis patients recover motor function whole-arm. This system consists device, haptic (PHANTOM Premium), motors, controllers work station. And portable, wearable adjustable doing home training. Through finite element software (ANSYS), main...

Taking into account the complex interferences in underwater environment, this paper presents a neural network-based self-tuning PID controller for spherical AUV. The control system consists of network identifier and controller, weights networks are trained by using Davidon least square method. proposed is characterized with strong anti-interference ability fast convergence rate. For its simple structure, can be easily realized hardware. linear velocity AUV controlled to precisely track any...

In minimally invasive surgery, the surgeon is exposed to X-ray, threatening surgeon's health due depositing long. It important find a method instead of using X-ray during MIS. And force feedback key factor for operate this system successfully. paper, we developed novel catheter sidewall tactile sensor array, which based on robotic operating with master-slave structure. can detect information between and blood vessel in detail, transmitting detected by system. The calibration work single...

The exoskeleton robot technology is more and used in the assisting stroke patients implementing rehabilitation training. In this paper, a novel finger has been described to aim at helping varieties of hemiparalysis recover motor function. system adopts EEG control mainly consists robot, system, HMI controllers unit, some sensors workstation. And hand mechanism portable, wearable adjustable for doing home Base on Denavit-Hartenberg (DH) parameters method, kinematic model built be designing...

In Vascular Interventional Surgery (VIS), the surgeons are exposed to X-ray threatening surgeons' health due depositing which lasts long. It is significant find a method keep away from during VIS. this paper, novel master-slave robotic catheter system for VIS has been proposed. The surgeon operates real on master side, can make full use of natural manipulation experience and skills obtained in conventional navigation. feedback operating force side plays an important role improving safety...

In order to reduce the impact of electric vehicles (EVs) charging load on power grid, an EV prediction model based variational mode decomposition (VMD) and support vector regression (SVR) is proposed against background real-time electricity price (RTEP) ambient temperature (RTAT). Firstly, historical data decomposed into a series modal functions with different characteristics using VMD algorithm. Furthermore, combined RTEP RTAT, SVR used establish model, penalty factor C kernel function...

This paper proposed a novel grasper for master-slave robotic catheter navigation system in Vascular Interventional Surgery (VIS). The developed can imitate the grasping motion of surgeon during VIS. is key factor to drive into vessel accurately. It adopts common structure like pliers, which guarantee that be clamped on same axes with other via hole. clamping force adjusted by screw through changing entered length change compression spring. consists two graspers both master side and slave...

In recent years, all kinds of underwater robot have been developed owing to having widely used in narrow pipelines, detection or complicated spaces full with reefs. An amphibious spherical is presented the paper. The paper has focused on characteristic analysis land for an robot. includes a circular acrylic plate, sealed hemispheroid and four drive units. Each them consists water-jet propeller two servo motors. rotation angle motor can be changed by adjusting duty ratio motor. A variety...

This paper presents a kinematic model of an upper limb rehabilitation robot system based on Denavit-Hartenberg parameters method. The possesses advantages less weight, compact size, and interaction in the process. Furthermore it can provide sufficient work room for patient's limb. mainly consists exoskeleton device (ULERD), haptic called PHANTOM Premium, interactive virtual reality environment. proposed is master-slave system. impaired hand hard bolted to ULERD, so doctor (or intact...

This paper presents a novel upper limb rehabilitation robot system based on virtual reality as many benefits of robots involved in for stroke are found out. The has advantages small size, less weight and interaction rehabilitation. mainly consists haptic device called PHANTOM Premium, the exoskeleton (ULERD) environment. impaired hand wears ULERD, so therapist can control move injured by Premium tele-operation. With description system, realization environment is implemented, which...

Force feedback plays a significant role in robot-assisted catheter system. How to realize the force feedback? transmit experiences of skilled surgeons? Certainly, it is sensing In this paper, two kinds systems for robotic system have been proposed and developed, we did experiments evaluate performances developed systems, experimental results indicated that training are effective, they suitable They can be used during endovascular neurosurgery, furthermore, extract operating skills...

Based on Raspberry Pi of ARM Cortex-A53 kernel, B/S(Browser/Server) architecture service, ESH (Eclipse smart home) project platform, wireless networking technology, home environment monitoring system is designed. The composed controller, EnOcean/Wi-Fi sensor control network, PC client. completes the hardware and software design controller: transplant embedded Linux operating platform; configure Wi-Fi network card driver; EnOcean complete Program controller node terminal design, developed a...

In minimally invasive surgery, the surgeons are exposed to X-ray, threatening surgeons' health due depositing long. It is important find a method instead of using X-ray during Vascular Interventional Surgery (VIS). this paper, novel master-slave robotic catheter system for VIS has been proposed. The operate real on master side, which can make full use natural manipulation skills obtained in conventional navigation. And acquired operating information be transmitted into controller. control...

In this paper, the hysteresis current control (HCC) technique based on space vector modulation (SVM) for shunt active power filter (APF) is proposed. The switching algorithms of HCC SVM manage to generate compensated according reference current. Harmonics extraction instantaneous and reactive theorem in time domain by calculating compensation. A closed loop system carried out error difference between which obtained from compensation actual needs be injected back into grid. By implementing...

In the biomedical field, a wireless microrobot in pipe which can move smoothly water or other aqueous mediums has been urgently demanded. this paper, several methods of designing novel with symmetrical motion characteristics have discussed and new kind developed. According to modelling analysis, we considered two kinds common cases occurring vertical motion, required gravity compensation. Based on groups simulations experiments forward-backward upward-downward inclined plane results dynamic...

Aiming at the problem that traditional PID controller was not ideal, parameters could be adjusted to best state, and control system achieve good effect, an improved seagull optimization algorithm (SOA) based on Sine chaotic mapping proposed optimize of controller. strategy adopted make initial population evenly distributed in search space, improve shortcomings algorithm, such as low solution accuracy, slow convergence speed easy fall into premature convergence, accuracy algorithm. Eight...