Working Performance Research Articles

Performance of multi-ribbed composite wall incorporating reactive powder concrete-filled steel tubular columns under axial compression

In this study, axial compression researches of an innovative composite shear wall, named multi-ribbed composite wall incorporating reactive powder concrete-filled steel tubular columns, were conducted using theoretical analyses as well as experimental and numerical investigations. This precast hybrid system embedded reactive powder concrete-filled steel tubular columns as boundary elements of multi-ribbed composite wall. A novel approach, namely the unified strength theory, was adopted in consideration of various materials diversity. The outcomes of unified strength theory were utilized to predict the ultimate compressive capacity of multi-ribbed composite wall equipped with reactive powder concrete-filled steel tubular columns. The proposed theoretical formulas were validated against the experimental results reported in this paper. Despite the fact that the calculated formula with b= 0 was obtained to predict the closest capacity value of the test specimen infilling ordinary concrete. The calculations with different values of b clearly indicated that the intermediate principal stress effect should be rationally considered. Experimental observations suggested that the frame column significantly contributed to improving the compressive performance throughout the entire process and maintained the wall integrity. Meanwhile, finite element models were developed using the ABAQUS program, followed by the elaboration of its numerical implementation. The numerical predictions of ten shear wall specimens infilling reactive powder concrete were found to be reasonably in agreement with the calculated results corresponding to b= 0.5. These findings revealed the characteristics of multiple defensive lines of "block-ribbed column-frame column" under axial compression. Following the successful validation of finite element models, parametric studies were carried out to evaluate the influences of the filled block compressive strength, steel tube wall thickness and height-width ratio. The results show that the axial compression capacity of multi-ribbed composite wall incorporating reactive powder concrete-filled steel tubular columns can be noticeably improved with an increase in block strength and tube thickness. The proposed composite wall demonstrates favorable cooperative working performance and desirable displacement ductility. Subsequently, the primary objective of this pilot study aimed at developing a reliable theoretical calculation formula and conducting numerical simulation verification of the innovative composite wall. The aforementioned conclusions are intended to provide insights for the guidance and optimization of engineering structures.

INTESTINAL PARASITISM IN WORKING HORSES AND ASSOCIATED ZOONOTIC RISKS IN LOWLANDS OF NEPAL

The presence of intestinal parasites influences equines' well-being and working performance. However, the scenario of parasitism in working horses in the lowlands of Nepal is yet to be explored. The present study aimed to reveal the prevalence and diversity of intestinal parasites (protozoa and helminths) and to list the zoonotic species in working horses in the lowlands of Nepal. Fresh fecal samples (N=102) from horses were collected at two locations (Chitwan and Birgunj) in the lowlands of Terai and were transferred to the research laboratory. Coproscopy was carried out via direct wet mount, formalin ethyl acetate (FEA) sedimentation, saturated salt flotation, and acid-fast staining techniques. Coproscopy revealed an overall prevalence rate of 90.2% (92/102) with 15 known diverse species of parasites (Protozoa: 5 and Helminths: 10) and an unknown coccidian, out of which eight possess zoonotic potential. The prevalence and diversity of intestinal parasites were higher in adult than in young animals (90.7%; 15 spp. vs. 88.9%; 11 spp.) The overall prevalence of helminths was double that of protozoa (89.2% vs. 43.1%). Furthermore, polyparasitism was much more prevalent than monoparasitism (85.3% vs 4.9%). Co-infection with two parasite species (37%) was higher in young horses. In comparison, triplet infection (34%) was higher in adults, and a maximum concurrency of up to six species of parasites at a time was recorded. Following it, the differences in the prevalence rate of parasites based on the predictor of risks, like sex, grazing, domestication type, nature of the floor, and medication practices, were statistically significant. Working horses in the lowlands of Terai harbored a significant variety of intestinal parasites with important prevalence. Since eight of the reported parasitic species were zoonotic, infected horses pose a zoonotic risk to the owners. Therefore, timely deworming, pasture management, and reduction in working pressure are highly recommended.

Study on repeated discharge frequency characteristics of plasma pulse equipment

In order to increase the production of unconventional oil and gas, it is necessary to improve its reservoir. Plasma pulse technology is one of a safe and environmentally friendly reservoir reconstruction technology. In this paper, the discharge test of plasma pulse equipment was carried out in the laboratory. The different discharge stages (pre-discharge, main-discharge, sinusoidal attenuation oscillation and post-discharge stage) of plasma pulse equipment in a single discharge were discussed, and the frequency characteristics in the repeated discharge were studied in detail. The discharge test shows that the energy and average power of main-discharge stage are about 109 J and 15.6 MW respectively, and the discharge frequency range is about 0–25 Hz. Furthermore, the linear attenuation function model of breakdown voltage change under the initial discharge frequency of 4 Hz, 9 Hz, 14 Hz and 19 Hz is established, and the change law of breakdown voltage decreases linearly with the increase of discharge frequency is revealed. The results show that the research content of this paper has an important guiding significance for revealing the variation law of repeated discharge frequency characteristics of plasma pulse equipment, which is helpful to further optimize the design of plasma pulse equipment and improve its working performance.

A role of Spirituality and wellbeing at workplace and its connection to happiness and performance of employee working in higher education Institutes

Workplace spirituality develops connections and a sense of purpose among employees, which boosts morale and job satisfaction and enhances output, innovation, and teamwork—all of which contribute to improved organizational performance. The objective of the research is to study the effects of practicing workplace spirituality and wellbeing, maintain the happiness that helps to increase better productivity of employee. Research addresses two questions: 1. Does workplace spirituality and wellbeing plays a vital role in happiness of employees in Higher education Institutions. 2.  Whether practicing spirituality and wellbeing at workplace affects significantly on performance of employee working in Higher education Institutions. Based on previous study it is found that the, workplace spirituality and wellbeing of academician play a vital role in happiness and practicing spirituality and wellbeing at workplace affects significantly on performance of employees working in Higher Education Institutions.

Innovative cooling technique to improve the performance of photovoltaic panels

The working performance of solar photovoltaic panels is affected by several factors. Accumulated dust and elevated temperatures from higher solar irradiance are the main factors. Therefore, a novel dual-cooling approach was employed, and its effect on the solar photovoltaic panels’ performance was investigated. The working front and backside temperatures, output power, and efficiency of the cooled solar photovoltaic panel were evaluated and compared. The results revealed that the current cooling process reduced the front and backside temperatures of the module by 22–45% and 34–47%, respectively, as compared with the dusty solar photovoltaic module. In the cooled photovoltaic module, the output current was higher by 26–48% and 4–5% compared with dusty and controlled modules, respectively, while the output voltage was found to be higher by 8–10% compared with the controlled and dusty modules. This led to a rise in output power for the cooled photovoltaic module by 22–51% and 8–13% compared to dusty and controlled modules throughout the day. In addition, the presence of dust on the photovoltaic module significantly reduces the overall efficiency to 11% compared to 17% when applying the cooling process. The levelized cost of electricity from the current cooled system was lower by 38.5% and 8% than in the dusty and uncooled systems, respectively. This means the proposed cooling system is efficient from an economic point of view. The results showed the distinct importance of the current dual-cooling process to avoid photovoltaic module degradation by accumulated dust and elevated temperatures.

Mechanical behavior of self-compacting recycled concrete reinforced with recycled disposable medical mask fiber

The outbreak of the COVID-19 epidemic has led to a large number of waste disposable medical face masks (DMFMs) worldwide, which seriously pollute the environment and threaten human health. In this paper, waste DMFMs were recycled as mask fiber and mixed into self-compacting recycled aggregates concrete (SCRAC) to form a mask fiber reinforced self-compacting recycled aggregates concrete (FRSCRAC). The effects of recycled coarse aggregate (RCA) replacement ratio, DMFM fiber content, and length on the working and mechanical properties of FRSCRAC were investigated. The results show that the specimens meet the requirements of self-compacting concrete (SCC) in terms of working and mechanical performance, but the RCA and DMFM fiber could reduce the workability of the FRSCRAC, and the higher the amount of RCA and DMFM fiber, the more obvious the reduction. At the same time, the mechanical properties of FRSCRAC increased as the decreasing RCA replacement ratio and growing DMFM fiber content. Compared with specimens without DMFM fiber reinforcement, the compressive strength, split tensile strength, flexural strength, and elastic modulus were increased by 1.3%-9.6%, 1.46%-8.6%, 24.4%-54.69%, and 0.65%-4.73%, respectively. Moreover, the reduction of the DMFM fiber length is favorable to the mechanical properties of FRSCRAC as well. Furthermore, the X-ray CT and scanning electron microscope (SEM-EDS) techniques were applied to analyze the microstructure of typical specimens. The results showed that the DMFM fiber and surrounding mortar could form a multiphase composite, which reduces the porosity and improves interfacial stress transfer efficiency, thus enhancing the mechanical properties of FRSCRAC. In addition, based on the experimental results, the mechanical strength index of FRSCRAC and the calculation formula of its mutual conversion relationship were proposed. The research conclusions of this paper can provide a reference for the application of waste DMFM fibers in FRSCRAC.

Dynamic Load Analysis of Mine-Truck Using Multibody Dynamic Analysis Method

Abstract: Vehicle load distributed on front & rear axle assembly during various working conditions is one of the most important factors influencing working performance and service life of drive axle assembly. The dynamic load on axle assembly is higher compared to the rated load because of variations in vehicle speed and road surface conditions. Early failure of structural components is caused because of higher dynamic reaction forces due to uneven road profiles. The dynamic load calculation of axle assembly is presented in this paper for a Mine-truck with various road conditions and vehicle speeds. The road load conditions consist of grade, bump & path hole. Mine-truck with payload capacities of 63 Ton is considered for the study. The behaviour of vertical force is calculated for different vehicle speeds (3 - 12 km/hr.) of the machine on the front & rear axle assembly during running conditions. Multi-body dynamic Analysis tool ADAMS is used for this study. ADAMS helps to study the dynamics of moving parts and load distribution throughout mechanical systems during motion. The Mine-truck3D model was created with the help of computer-aided design (CAD) software. Major units of Mine trucks are considered to prepare 3D models like Cabin-engine mass, Bucket, front axle assembly, rear Axle assembly & tires. Multi-body vehicle models are prepared in simulation software ADAMS by importing 3D models prepared by computer-aided design (CAD) software. This provides guidelines for selecting dynamic load factors while designing structural parts of the vehicle.

Study on the Properties and Hydration Mechanism of Calcium Carbide Residue-Based Low-Carbon Cementitious Materials

Alkali-activated cementitious materials, as an environmentally friendly cementitious material, can effectively reduce carbon emissions and improve the utilisation of solid wastes. However, traditional strong alkali activators have limitations such as high carbon emissions and poor safety. In order to overcome the defects of traditional strong alkaline activators and realise the high value-added use of calcium carbide residue (CCR), this paper adopts CCR as an alkaline activator to activate granulated blast furnace slag (GBFS)-steel slag (SS) cementitious systems for the preparation of alkaline-activated cementitious materials. The effects of CCR content and SS content on the compressive strength and working performance of CCR-GBFS-SS cementitious systems are analysed, along with the hydration process of CCR-GBFS-SS cementitious systems and the mechanism of action through the hydration products, their chemical structure and their microscopic morphology. The research results show that CCR-GBFS-SS cementitious systems have a 28-day compressive strength of 41.5 MPa and they can be controlled by the setting time; however, the flow performance is poor. The SS content can be increased to improve the flow performance; however, this will reduce the compressive strength. In CCR-GBFS-SS cementitious systems, CCR is the main driving force of hydration reactions, GBFS mainly provides active silica and aluminium and the amorphous C-(A)-S-H gel and ettringite formed by the synergistic action of multiple solid wastes are the main sources of compressive strength. With the extension of the curing time, the amount of hydration products in the cementitious systems gradually increases and the matrix of the cementitious systems gradually becomes denser. This study will provide a reference for the consumption of low-value solid waste such as CCR and the preparation of low-carbon cementitious materials from multi-component solid wastes.

MMD-MSD: A Multimodal Multisensory Dataset in Support of Research and Technology Development for Musculoskeletal Disorders

Improper sitting positions are known as the primary reason for back pain and the emergence of musculoskeletal disorders (MSDs) among individuals who spend prolonged time working with computer screens, keyboards, and mice. At the same time, it is well understood that automated technological tools can play an important role in the process of unhealthy habit alteration, so plenty of research efforts are focused on research and technology development (RTD) activities that aim to provide support for the prevention of back pain or the development of MSDs. Here, we report on creating a new resource in support of RTD activities aiming at the automated detection of improper sitting positions. It consists of multimodal multisensory recordings of 100 persons, made with a video recorder, camera, and wrist-attached sensors that capture physiological signals (PPG, EDA, skin temperature), as well as motion sensors (three-axis accelerometer). Our multimodal multisensory dataset (MMD-MSD) opens new opportunities for modeling the body stance (sitting posture and movements), physiological state (stress level, attention, emotional arousal and valence), and performance (success rate on the Stroop test) of people working with a computer. Finally, we demonstrate two use cases: improper neck posture detection from pictures, and task-specific cognitive load detection from physiological signals.

Numerical study on the transport current distribution in the multi-layer CORC coil

The conductor on round core (CORC) cable has attracted increasing attention due to its strong and high-efficient current carrying capacity. It is considered as one of ideal candidate cables for manufacturing nuclear fusion magncets. Under the circumstance, the transport current distribution of the coils wound by CORC cables has significant impacts on the operating performance of nuclear fusion magnets. Considering the difficulty in experimental tests, numerical model is an effective way to illustrate transport current distribution of the multi-layer CORC coil and provide further insights into its working performance. Therefore, in this work, A 3D finite element model based on the H formulation is proposed to simulate a single-turn and multi-layer CORC coil. The validity of the model has been verified by experimental results. Based on the proposed model, the transport current distribution of the multi-layer straight CORC cable and the multi-layer CORC coil is compared and discussed. In addition, the current density distribution on the superconducting tapes of the multi-layer CORC coil is also investigated. This work can provide an important reference for the design and practical application of multi-layer CORC coils.

An umbrella-shaped flexible mechanism piezoelectric actuator with driving foot trajectory control

Traditional stick-slip piezoelectric actuators generally have problems such as large backward motion and small load capacity, which affect the driving effect. In this study, the effect of no backward motion and large load capacity is realized by controlling two sawtooth wave-driven piezoelectric stacks on the basis of umbrella-shaped flexible mechanism. The trajectory of the driving foot is simulated by transient simulation and verified by experiment. A prototype of actuator is made, and the effects of voltage, symmetry of sawtooth wave, and the phase difference of the two waves on the driving effect are investigated through experiments, and the optimal driving waveform is found. Experiments have shown that no displacement regression and stable driving is achieved when driving with two sets of sawtooth waves with 100 V, 100% symmetry and 20 V, 70% symmetry. With this drive waveform at 1 Hz, the maximum horizontal and vertical loads are 150 g and 1400 g, respectively. And the maximum driving speed is 13 935 μm s−1 when the driving frequency is 7000 Hz. Experimentally, it is proved that the actuator is able to realize smooth driving and large load capacity without backward motion, and has the same forward and reverse working performance, which has greater research value and market application scenarios.

MUSİQİ DƏRSLƏRİNDƏ MÜƏLLİMİN YARADICILIQ FƏALİYYƏTİ

Creative Activity of the Teacher in Music Lessons Summary The article is devoted to the study of the creative activity of a music teacher. It is noted here that musical pedagogical activity includes the work of a teacher, choirmaster, musicologist, performer, and researcher. The peculiarity of this activity is that it contains creativity. Artistic creativity in the work of a music teacher is manifested in the ability to conduct lessons and extracurricular activities in an interesting and exciting way, and in the bright imaginative performance of musical works, and in pedagogical improvisation, i.e. in the ability to quickly and correctly assess the situation and make prompt decisions. The highest form of creativity of a music teacher is research activity. Key worlds: aesthetic education, musical-pedagogical activity, creativity, research

Enhancing Productivity at Home: The Role of Smart Work and Organizational Support in the Public Sector

In recent years, Italian Public Administrations (PAs) have swiftly adapted to flexible work arrangements due to the impact of COVID-19. The flexible work has led to addressing new challenges including the need to balance work demands with family commitments, a lack of social support, struggles with inadequate technology, and managing home interruptions that negatively affect home performance. Based on the job demands-resources (JD-R) model, the present study aims at examining the negative impact of home interruptions on smart working performance and the moderating role of two potential job resources: organizational support and perceived quality of the smart working. A convenience sample of 301 Italian public employees engaged in smart working completed an online questionnaire. Multivariate regression analysis results showed that organizational support plays a moderating role in reducing the negative effect of interruptions on home performance. However, the findings did not support a moderating role for the perceived quality of smart working. Overall, these findings highlight the critical role of social factors in buffering the negative effects of smart working, as compared to the quality of the technological arrangements. This information could be valuable for organizations looking to enhance the effectiveness of smart working by focusing on organizational support.

Design and Experiment of Plate Taking Control System of Edible Sunflower (Edulis helianthus catino L.) Harvester

This study aims at the problems of high labor intensity, high cost and high loss rate of mechanical picking of seeds, low mechanization level and difficulty to guarantee the quality of picking plates in the process of picking edible sunflower. Based on the principle of manual plate taking, a plate taking control system for a sunflower harvesting table was designed. The principle of taking the plate of the edible sunflower harvesting table was analyzed. According to the actual operation requirements, the overall scheme of the sunflower plate control system is determined, and the control strategy of imitating artificial low-loss harvesting is designed. To reduce the grain loss in the process of taking the plate and improve the control accuracy of the system on the movement speed and displacement of the key components in the process of taking the plate, a trapezoidal acceleration and deceleration control algorithm is designed as the control algorithm of taking the plate. The working performance of the plate control system was verified with the absolute error, relative error and total loss rate of the harvest as objectives. Bench and field verification experiments were both carried out. The bench experiment showed that the speed error of the plate parts was not more than 0.028 m/s. In the bench experiments of the device, the maximum positioning error was 1.25 mm, the average relative error was only 0.94% and the grain loss rate was not more than 2.26%. Its result showed that the system algorithm was reliable, the positioning accuracy was high and the plate taking operation can be completed well. The field verification experiment showed that the forward speed of the unit was in the range of 0.4~0.8 m/s, and the total loss rate of harvest was less than 5%. When the forward speed is 0.6 m/s, the minimum harvest loss rate is 2.32%, which indicated the control system meets the requirements of sunflower harvesting operation.

Establishment of a Feeding Rate Prediction Model for Combine Harvesters

Feeding rates serve as a vital indicator for adjusting the working parameters of the combine harvester. A non-invasive diagnostic approach to predicting the feed rates of combine harvesters by collecting vibration signals of the inclined conveyor was introduced in this study. To establish a feed rate prediction model, the correlation between feeding rates and vibration signal characteristics was investigated. Vibration signal characteristics in both the time domain and frequency domain were also analyzed in detail. The RMS (root mean square) value and the total RMS value of the one-third octave extracted from the vibration signal were utilized to establish a feed rate prediction model, and field tests were conducted to verify the model performance. The experimental results indicated that the relative errors of the established model range from 3.1% to 4.9% when harvesting rice. With the developed feed rate prediction system, the control system of the combine harvester can acquire feed rate information in real time, and the working parameters can be adjusted in advance, thereby, it can be expected to greatly enhance the working performance of the combine harvesters.

MAIN PROBLEMS OF DIGITALISATION OF CONSTRUCTION WORKS. SOLUTION WAYS

The article aims to study construction works, the specificity of which is a rather long cycle of turnover of funds. In this regard, the authors researched the performance of geodetic works at all three stages of construction: breakdown, provision of geometric parameters of constructions, control measurements, and executive surveying. We analysed information on using the latest technologies in construction activities and their subtypes. We paid considerable attention to the implementation of modern technologies and approaches. The authors considered such a solution as a ‘digital double’ of the building, which can update the BIM model with real-time data, improving both the construction process and the decision-making. We proposed digital technologies that make it possible to provide a theoretical basis for modelling, forecasting, and control. Thanks to the suggested approach to creating an electronic version of a digital plan, the need for paper media automatically disappears. Also, the transition to a digital form entails a shift to a new level of graphic accuracy. The key indicators of modern construction are modern design systems, which include spatial design and the creation of virtual models and geo-information systems that provide a rational choice of construction sites, optimisation of design and construction, and effective use of resources. The authors also raised a question regarding the outdated regulatory framework. Unfortunately, the main regulatory framework remained at the level of the 80s of the last century. The national regulatory framework is in a difficult situation; the regulatory documents of the former Soviet Union are outdated. It is necessary to update these documents, but the issue of copyright arises here, whereas creating a new regulatory framework requires resources and time. Therefore, it is impossible to utilise all the resources of the measuring equipment. As a result of the research, the authors proposed new approaches to monitoring construction accuracy and creating an electronic version of the tablet during geodetic surveying. The article’s relevance lies in implementing technological progress with the help of digitisation of the entire construction life cycle. Keywords: construction, architecture, vector graphics, geoinformation systems, geodetic technologies, digital construction technologies.

Motivation that Affecting the Effectiveness of Personnel’s Work Performance in Various Markets in Chengdu City

The objectives of this research were: 1) to study personal factor that affect work efficiency of the workers in Chengdu city. 2) to study motivation factors that affect work efficiency of the workers in Chengdu city. This study was quantitative research. The population were people who live in Chengdu city. The exact number is unknown. The samples size was the workers in Chengdu group was 376 persons. Using a purposive sampling method. The tool used for collecting data is a questionnaire. The statistics used in the analysis were frequency, percentage, mean, standard deviation and multiple regression analysis. Major findings: 1) the workers in Chengdu with different genders, ages, average monthly income and length of employment. Effective in working They are significantly different at the 0.05 level and 2) The motivation factors of responsibility, nature of work performed and progress affect the effectiveness of workers in Chengdu with statistical significance at the 0.05 level.

Smartphones' impact on nursing performances: a cross-sectional multicenter study.

In recent years, the technology world has significantly shaped society. This study aims to survey the views of registered nurses with hospital working experience regarding the personal communication devices use impact in hospital units. The secondary outcome of this study was to identify differences in mobile device use based on demographic and organizational factors. Cross-sectional study by survey. The questionnaire comprises 22 items divided into four sections. Overall 778 questionnaires were included in the study, 329 questionnaires were collected on pen-and-paper, whereas 449 by an online survey. Findings showed that smartphones have a different impact on performance, utilization and impact scale according to gender, age and educational attainment. Generally males using more frequently personal communication devices for non-workrelated activities affected negatively their working performance by respect to females. Moreover, younger nurses report being more distracted by using smartphones for non-work-related activities than older nurses. At the same time, younger nurses believe that smartphones may lead to an improvement in patient care skills. Nurses with fewer years of service (1 month - 10 years) report being more distracted by non-work-related activities on their smartphones than nurses with more years of service (>20 years). The smartphone is a potential distraction source. The most exposed groups are the younger nurses' and those with little work experience, and both groups (young age, less experience) can be considered factors for potential distraction.

Mesh-based antenna with broadband transparency for dual-band shared-aperture array

Mesh-based antenna with broadband transparency for a dual-band shared-aperture array is proposed in this design. The low-radar cross section (RCS) frequency selective surface (FSS) cell is obtained firstly by combining the capacitive and inductive strips. It can be found that the electromagnetic (EM) transparent bandwidth across the high band (HB: n77) of the FSS can be enhanced by increasing in the number of strips. Then the low band (LB) antenna composed of low-RCS mesh-based elements is constructed. Remarkably, the EM transparent characteristic and the LB working performance can be individually controlled, avoiding time-consuming optimization. Subsequently, the LB transparent antenna is introduced into the array to eliminate the blockage effect on the HB antenna. The radiation patterns of the HB antenna are recovered well across the entire HB. Finally, the array prototype is fabricated and measured results show that the array covers a dual band of 1.7–2.7 GHz (45%) and 3.3–4.2 GHz (24%), showing stable radiation patterns in both LB and HB antennas. The average gains of the LB and HB antennas are 8.64 dBi and 8.58 dBi, respectively. The results verify that the proposed broadband transparent mesh-based antenna is attractive in the shared-aperture array.

Impedance Circle Modeling and Dynamic Characteristics Analysis of Contactless Energy Transfer System Under Load Variations in Rotary Ultrasonic Machining

In rotary ultrasonic machining, contactless energy transfer (CET) is developed to transmit energy to the transducer at the series resonant frequency or resonant frequency of the transducer. Specifically, during energy transmission, variations in working conditions such as variable axial forces will change the load of the transducer and introduce undesired dynamic effects into the contactless energy transfer system (CETS). In order to explore the connections between these variations and the working performance more directly and theoretically, a new theoretical model—CETS impedance circle is proposed in this paper to reflect the CETS dynamic characteristics, including the CETS frequency characteristics and the relationships between CETS transfer performances at different frequencies under load variations. With the developed theoretical model, the effect of load variations on the trends of CETS impedance circle is investigated. Moreover, based on the impedance circle and its trends, the CETS frequency characteristics, the effect of primary series compensation, and a comparison of the transfer performances at the two working frequencies are theoretically studied. Finally, the CETS impedance circle theories are experimentally verified, and the experimental results are consistent with the analysis of the theoretical model.