Deadbeat predictive current control (DPCC) holds the superiorities of excellent tracking ability and high bandwidth. However, DPCC performance is negatively impacted by parameter mismatch inverter nonlinearity, resulting in distortion. To address these issues, a reduced-order generalized proportional integral (GPI) observer based robust resonant deadbeat (RRDPCC) method presented this article for permanent magnet synchronous motor (PMSM). First, non-periodic uncertainties generated periodic...

Electrical impedance tomography (EIT) is an advanced visualizing technique with advantages such as real time, noninvasiveness, and low cost. However, the quality of EIT image still needs to be improved due two inherent problems, i.e., ill-posed solution "soft-field" effect. Nowadays, most existing evaluation methods are supervised, relying on prior information or reference images, which often unavailable in applicable fields. In this paper, we proposed unsupervised method based a fast fuzzy...

Electrical impedance tomography (EIT) is a radiation-free, fast, and convenient tomographic technology that uses only surface electrodes. EIT has the potential to provide continuous bedside monitoring of patients, for example, during mechanical ventilation. However, soft-field nature leads an ill-posed reconstruction problem often results in multiple image solutions. This exacerbated when systems are used variable measurement setups scenarios, as few adjustment methods or calibration...

Electrical impedance tomography (EIT) is a noninvasive imaging technology that widely used in industrial and medical applications. The reconstruction methods are ill-posed sensitive to the scale of perturbations prior assumptions, so differential mostly practice. Absolute promising but has always been challenge practical One obstacles determine reference measurement frame from uniform distributed domain. In this article, we develop estimation technique for homogeneous conductivity...

Abstract Soil salinization has become a global environmental problem with the potential to cause serious land degradation. Thus, improving salt‐affected soils and enhancing nutrient utilization efficiency of saline farmlands through scientific effective measures are urgent problems. In this study, 2‐year field experiment was conducted evaluate effects different soil amendments their combinations on dynamics salinity, nutrients, crop yield in moderately salinized (EC 1:5 0.78 dS m −1 total...

In industrial fields, Nondestructive Testing (NDT) has become an important method to test the quality of welds. For low-contrast pipe weld defect x-ray image, traditional detection low precision. this paper, automatic for defects based on a triplet deep neural network is proposed. First, original X-ray image changed into relief so that feature more obvious. Second, vector obtained by mapping through network. The makes similar vectors are closer, and distances different farther. It first time...

Objective. Ultrasound-targeted microbubble destruction (UTMD) technique has recently been developed as a nonviral delivery of gene therapy. This study aimed at investigating the survival and apoptosis ovarian cancer cell line OVCA-433 by inhibiting Livin expression through ultrasound-targeted destruction. Methods. We synthesized targeted agent for UTMD-mediated shRNA against in human cells. Lipid microbubbles were conjugated with luteinizing hormone-releasing hormone analog (LHRHa) an...

Different from the traditional deep tillage, vertical rotary tillage can smash soil without disturbing layer, which improves water infiltration and promotes salt leaching. This has gradually been applied in research into saline alkali improvements. However, there is limited knowledge about effect of on temporal–spatial distributions under shallow underground level. Therefore, a preliminary column experiment was carried out to explore results movement three different methods: depth 20 cm...

Electrical impedance tomography (EIT) is applied to visualize the electrical conductivity distribution of a mixture materials. Due " soft-field" effect and nonlinear problem, it difficult effectively reconstruct images in EIT. A number image reconstruction algorithms have been proposed, linear back-projection (LBP) algorithm one most common owing its advantages real-time imaging no parameter. In this paper, an iterative LBP (ILBP) method proposed reduce artifacts around objects improve...

Electrical impedance tomography (EIT) is becoming a popular medical technology, including lung monitoring. Before instrumentation and reconstruction methods being applied clinically, experiments need to be carried out on models. However, existing models are usually with discontinuous structure conductivity, which makes it difficult for researchers replicate. A method constructing chest model was proposed based fused deposition modeling typical 3D printing technology. Conductivity controlled...

Electrical impedance tomography (EIT) is a non-invasive imaging technology that reconstructs the interior conductivity distribution (variation) of cross-section an object through two different sets measurement data. However, due to unavailable reference measurements, it usually hard reconstruct absolute in practice. In this paper, verified any set uniform field can be expressed as product parameter and normalized frame. The effect voltage bias on reconstruction explored kinds models, \pm 4%...

Abstract Digital technology is leading fundamental innovation and development, digitalization represents a great opportunity for the energy industry to take off develop. In this paper, digital intelligent technologies are used integrate, analyze, manage distribution network equipment information. Secondly, new smart terminal design proposed modeled using IEC 61850 standard monitor status of grid management equipment. Through active system structure, based on decoupled PCC, model constructed...

Abstract As an advanced process detection technology, electrical impedance tomography (EIT) has wide application prospects and advantages in medical imaging diagnosis. However, a series of issues need to be addressed before applying EIT for bedside monitoring. Medical diagnosis monitoring are dynamic measuring process, where the positions electrodes shape detected field changing dynamical. Due inability cope with changeable electrode various fields, existing systems mainly used industrial...

Detecting the components in a vessel has been crucial study field of industry, and Electrical impedance tomography (EIT) developed to solve this issue fast non-invasive way. As move, conductivity varies rapidly, background should be adjusted adapt change. Now that real-time measurements, shape boundary electrode distribution are available, voltages basic reference (uniform field) can calculated, estimated based on measurements. A estimation method two criteria is proposed. set simulations...

As a key role in multi-frequency signal processing, phase sensitive demodulation (PSD) can be used communication, sonar, bio-impedance measurement, mutual induction based non-destructive test,etc. Actually, the PSD is matched filter to reference signal; and presence of Gaussian noise, it also regarded as an optimal linear filter. However, practical measurement system, noise often possesses impulsive characteristics,i.e. noise. Thus, how effectively reduce challenging research task. This...