Design Of Compensation System Research Articles

Share repurchase and the cost of capital: Discussion on the nature of share repurchase of Chinese listed companies.

Share repurchase is not only an important financial policy of the company, but also a financial policy with a very wide range of influence. A scientific and reasonable share repurchase policy has a significant financial effect in terms of an equity structure optimization, capital structure adjustment, cash holding control, and even management compensation system design. The long-standing share repurchase in the U.K. and U.S. companies and the recent practice of share repurchase by Chinese listed companies imply an important financial proposition: share repurchase is a high-quality financial policy that, when properly applied, will help reduce the cost of capital. The data in this study show that share repurchases can reduce the level of firms' cost of capital and play an important role in enhancing their competitiveness. This study also finds that Chinese listed companies, when formulating and implementing share repurchase programs, do not subjectively view share repurchases as a policy tool to adjust cash holdings and capital structure. In addition, they do not view share repurchases as an alternative to cash dividends but use equity incentives for management as the main intention for share repurchases. This decision-making concept is not conducive to the rational use of share repurchase policies in the long run and should be a cause for concern in the business community. Finally, the leverage and the cash holding path are the main motives affecting share repurchases and are the important fundamental mechanisms in this study, while the mediating mechanism test finds that share repurchases mainly reduce the cost of capital through two information perspectives of analyst following and stock liquidity. The heterogeneity analysis shows that the role of share repurchases in reducing the cost of capital is more obvious in enterprises with fierce product market competition, high institutional investor shareholding.

Design and Analysis of a High-Precision Dynamic Compensation System for Seed Dropping Position in Corn Sowing Operations

In response to the problem of imprecise maintenance of plant spacing and row spacing during corn sowing operations in the middle of existing corn farms, this study designed a dynamic compensation system for corn seed dropping position. The test system includes a corn seeding machine operating unit, a seed dropping variable measurement and control system unit, a terminal control system, and a dynamic compensation system. The dynamic performance of the control system was tested experimentally. When undisturbed signals were loaded, regardless of whether the machine used the position compensation function or not, the coefficient of variation of longitudinal grain spacing was 2.6% ± 0.2%, and the longitudinal grain spacing was basically consistent. After adding disturbance signals, compared with not using the dynamic compensation function, the variation coefficient of seed spacing decreased by an average of 6.94% when using the dynamic compensation function. When using the dynamic compensation function, compared with not using dynamic compensation function, the variation coefficient of lateral grain spacing decreased by an average of 9.16%. Stability analysis of longitudinal and lateral grain spacing was conducted through bench tests, verifying the stability of the proposed dynamic compensation system for seed dropping position.

Design and Simulation Analysis of Semi-Active Lifting and Sinking Compensation System

The lifting and sinking motion generated by the drilling platform causes large fluctuations in the suspension tension of the large hook, which affects the stability of the drilling pressure acting on the rock at the bottom of the well, greatly reduces the efficiency of drilling and decreases the service life of the drill bit and the drill column under the action of cyclically varying loads, causing an increase in the overall drilling cost. In order to avoid the above situation, a nonlinear model of a semi-active lift-sink compensation system is designed and a method to improve the compensation efficiency of the system is proposed. Firstly, the relevant physical model of the hydraulic system is established, and then its simulation model is built according to the working principle of the semi-active lift and sink compensation system. Then the effects of different factors are added to the simulation model of semi-active lifting and sinking compensation, and finally the effects of different factors on the compensation efficiency of the active lifting and sinking system are compared. The simulation results show that a regular sinusoidal wave with a peak value of 6.5 m and a period of 10 s as the ship's lifting and sinking displacement input will reduce the compensation efficiency of the semi-active lifting and sinking compensation system, while the smaller the stiffness of the wire rope, the better the compensation effect of the drill column and the higher the compensation accuracy. The proposed method can effectively improve the compensation efficiency of semi-active lifting and sinking compensation system.

Design of real time magnetic field compensation system based on fuzzy PI control algorithm for comagnetometer

Alkali-metal-noble-gas comagnetometers operating in the spin exchange relaxation free regime have been widely used in frontier science research and navigation technology. Under normal circumstances, the comagnetometer operates at the compensation point so that any interfering external magnetic field is tracked and suppressed by the nuclear spin. This in turn can greatly diminish the comagnetometer’s sensitivity to the magnetic field; however, its sensitivity to rotations and to anomalous fields is still maintained. The compensation point is typically adjusted manually, which leads to low accuracy and compensation speed, in addition to only allowing short-term magnetic field stability. In order to account for these problems, we designed a three-axis magnetic field compensation system in real time based on LabVIEW, and employed it to a K−RbNe comagnetometer. Our study shows that by using a fuzzy proportional-integral (PI) controller, the compensation point can be tracked in real time and with higher precision when compared with manually adjusted methods, therefore improving the magnetic field stability and sensitivity of the comagnetometer.

Design of Compensation System Using Adhered Method and Overlapping Method at PT XY DKI Jakarta

Compensation is one of the essential factors that can motivate employees to improve performance. Compensation provided by the company must be comparable to the company's workload, job risk, and the competencies that accompany the position. The Company is obliged to provide compensation both financially and non-financially so that employees' standard of living needs can be met. Therefore, it is necessary to design an appropriate compensation system based on the value of the job (job value). The object of this study is XY Company, located in DKI Jakarta. XY company is engaged in education, namely online English courses and early childhood tutor franchise, as well as in the culinary field, namely online courses in the pasta pizza business. The research methods used are quantitative and qualitative methods sourced in scientific journals and trusted articles. This research focuses on the compensation system. The method of processing and analyzing data used to compile the job value and job grading-based compensation system in XY companies is to use Compensable Factors analysis using hay method, Salary Mapping Adhered, and Salary Mapping Overlapping. This study shows that the effective compensation system to be implemented by PT XY is to use overlapping methods. The division of salary overlapping methods brings more benefits because the salary increase is less significant than the adhered method

Design and Implementation of Demodulator and Carrier Phase Compensation System for Satellite Communication

A proposed design and FPGA implementation of a demodulator and phase compensation system is presented.The system is simple, accurate, dissipate low power. Simulations indicate that the proposed system compensates the error in the received phase quickly which decreases the bit error rate (BER) in wireless systems. FPGA implementation of the proposed system shows a power reduction by 27.91% and the speed by 66.89% compared to Costas loop.

Conceptual design and selection of a bladder type pressure compensation system for subsea actuators to prevent failure due to seawater head

Conceptual design and selection of a bladder type pressure compensation system for subsea actuators to prevent failure due to seawater head

Design and experiment of a GPS-based turn compensation system for improving the seeding uniformity of maize planter

The ability to compensate for seeding rates of planter units has the potential to mitigate the problem of inaccurate seed application rates due to lateral speed differences of planter units when planters are turning. This would result in an increase in crop yields and a reduction of the seed usage. In this article, a GPS-based turn compensation algorithm was designed to offset the seeding rates of planter units, and a simulation model in which the turning radius varied was built using MATLAB Simulink to evaluate the factors (the positioning accuracy, frequency of the GPS receiver, and travel speed) affecting the performance of the developed turn compensation system. Field experiments indicated that a four-row planter equipped with the developed turn compensation control system had better seeding accuracy (above 97%) and seeding coefficient of variation (below 1.52%) values than those of a non-compensation planter under equivalent working conditions, and a uniform seed spacing between planting rows could be obtained regardless of the change in the turning radius, indicating that the developed system could offset the seeding rates of every row automatically by turn compensation. The GPS used in this paper can be shared with a tractor automatic navigation system or any farm machinery equipped with a GPS device, which facilitates the manufacturing cost reduction and as well as the integration of this system and other agricultural machinery control modules.

Design of feedback wavelength demodulation and compensation system for FBG-tuned CW fiber laser

The cross-sensitivity of fiber Bragg grating (FBG) always leads to the complexity and instability in its engineering applications, and there are more uncertain factors that affect the center wavelength when FBG is used in fiber lasers as the tunable frequency selector. In order to obtain the stable wavelength of FBG-tuned continuous wave (CW) Er3+-doped fiber laser, we propose and demonstrate a feedback wavelength demodulation and compensation system, which consists of three interrelated parts: a wavelength tuning module controlled by a stepper motor, an all-fiber wavelength demodulation module and a single-chip-based control module. They work cooperatively in a feedback mode and achieve the stabilization of any output laser wavelength in its continuous tunable wavelength range. In the experiment, the output laser wavelength can be locked at the wanted wavelength and be compensated automatically under arbitrary manual tuning in a wide range. When the temperature varies from 10 °C to 40 °C, the laser wavelength shift is less than 0.01 nm for 150 min by real-time compensation, and the corresponding total wavelength shift of ∼0.7 nm is eliminated.

Correlation Between Company Condition and Work Achievement Of Employees in PT. Plantation Nusantara IV Balimbingan Plantation

The role of human resource management is reflected in the company's policy to regulate its human resources so that it can play a major role in working together and supporting the company's strategy by measuring the level of employee performance. Employee work performance is strongly influenced by the condition of company such as motivation factors, job satisfaction, working stress, physical condition of work, compensation system, and job design. The purpose of this study was to determine the relationship of motivation factors, job satisfaction, working stress, physical condition of work, compensation system, and job design with employee performance at PT. Perkebunan Nusantara IV Unit Kebun Balimbingan. This research was carried out at PT. Perkebunan Nusantara IV Unit Kebun Balimbingan in May 2018. This study uses non-parametric analysis with Kendall Tau test. The results showed that the factors of motivation, job satisfaction, work stress, physical condition of work, compensation system and job design were partially related to employee performance because of the significance value (0.000 <0.05). Motivation factors, job satisfaction, physical condition of work and compensation system are strongly related and the direction of a positive relationship with work performance is the correlation coefficient values of 0.895, 0.720, 0.733 and 0.706, respectively. Job stress factors are negatively related to work performance with a correlation coefficient value of -0.550. Job design factors are positively related to a low correlation level of 0.377. Simultaneously the six factors are significantly related to work performance because the value of Asymp.Sig <0.05

Design of electronic shogging dynamic compensation system for high-speed warp knitting machine

The guide bar shogging of high-speed warp knitting machine belongs to a complex bi-directional fast intermittent start-stop motion mode. The dynamic response performance of electronic shogging system is highly required in the knitting process of warp knitting machine. However, the control system has the phenomenon of response lag in the control process of the guide bar shogging. In order to compensate for the delay phenomenon of the system control processing and make the system achieve higher dynamic response performance, this paper designs a dynamic compensation control system of electronic shogging for high-speed warp knitting machine. Through the theoretical analysis and practical test of the system lagging response, the functional relationship between the system delay time and the shogging lag angle is summarized. On the premise of obtaining the function relation, the dynamic compensation control method and realization method of electronic shogging system are designed. The analysis of the motor feedback movement position curve shows that the dynamic compensation control system can improve the performance of the actual lapping angle area to follow the mechanical allowable lapping angle area, and greatly improve the knitting speed of the warp knitting machine. It provides important significance to realize high speed and full computerization for high-speed warp knitting machine.

Modeling and Simulation Analysis of Pre-Valve Compensation of Flow-saturated Resistant System

The load-sensing pre-valve compensation technology is widely used in the single-pump multi-acting mechanism composite motion circuit. Due to the use of multi-valve inlet valve front compensation, its structure is simple, only need to set a two-way fixed-rate valve, but the flow saturation conditions cannot be automatically adjusted. Through an in-depth theoretical analysis of the anti-saturation mechanism, composition and control strategy principle based on automatic flow reduction (AVR), the AMESim model of the system is established, and the anti-flow-saturation output characteristics of the system are obtained under different operating conditions by numerical simulation means, and the results show that the system can solve the problem of flow-saturation. It provides some technical reference for the design of the load-sensing pre-valve compensation system.

Design of recognition and compensation system for vehicle communication signal based on vehicle networking

A vehicle communication signal recognition and compensation system based on vehicle network is proposed to overcome the problems of the traditional vehicle communication signal recognition system, such as poor anti-interference and signal recognition accuracy. The hardware part of the system consists of three modules. The software uses inverse operator and Wiener filter to compensate the vehicle communication signal and improves the precision of signal recognition. The MFCC parameters are extracted as the main parameters of signal recognition, and the distance measurement between the unknown communication signal and each template is obtained by using the non-linear registration mode DTW, so as to realise the optimal registration mode of signal pattern recognition. Experimental results show that the anti-interference performance of the system is about 110 dB, and the recognition rate of different types of signals is more than 85%, which proves that the system has high recognition accuracy and strong anti-interference ability.

Design of recognition and compensation system for vehicle communication signal based on vehicle networking

Design of recognition and compensation system for vehicle communication signal based on vehicle networking

Design and Research of Active Heave Compensation System Based on Laser Ranging Sensor

Marine resource exploitation and marine cargo transportation were increasingly frequent. Due to the impact of the marine environment, ships or platforms were affected. In this paper, a servo electric cylinder was used as a wave compensation actuator to design a wave compensation system. The laser sensor was used to measure the displacement in the direction of the heave platform, and the obtained displacement was applied to the wave compensation in the heave direction to verify the feasibility of the compensation system.

Motion response analysis of mining vessel based on ANSYS/AQWA

To analyse the motion response of mining vessel under complex sea conditions and provide theoretical support for the design of heave compensation system, the hydrodynamic analysis software AQWA of three-dimensional potential flow theory was used to analyse the time-frequency response characteristics of mining vessel under the coupling of wind, wave and flow. The response amplitude operator (RAO) of the hull at different wave angles and the six-degree-of-freedom motion response of the hull at different currents were obtained. The results show that the wave angle has an influence on the Rao in the six degrees of freedom, but the frequency corresponding to the Rao peak is relatively close; the time domain analysis results show that the hull roll motion response is larger than the pitch; the maximum response angle of the roll is up to 4°; the effect of sea current velocity on swing, sway, and heave direction is different; the statistical average of wave force in different degrees of freedom is also affected by the wave angle. The simulation results in this paper can provide theoretical guidance for the design of multi-dimensional wave compensation system in mining system. Therefore, when designing wave compensation system, it is necessary to consider the influence of different situations.

Compensation System Design and Comparison of Very High Doppler Frequency Effect

One of the serious problems in the low earth orbit (LEO) satellite communication system is the very high Doppler frequency effect since the LEO satellite system runs very fast to keep the orbit altitude. Especially, this problem produces the critical performance degradation when the broad bandwidth is necessary for the very high speed satellite transmission of the very high resolution image data. As the data speed is increased, the higher efficient communication technology will be required to transmit the high-capacity of data to the ground station. In the LEO satellite communication systems, very large Doppler influence is generated because of the very fast movement of satellite. This Doppler spectrum shift effect, similar to the carrier frequency offset effect, can cause performance degradation in the satellite communication system. Therefore, it is very important to effectively compensate for this Doppler frequency shift. So, in this paper, we analyze this Doppler effect of LEO satellite receiver and propose an efficient compensation system design against the Doppler frequency. Two compensation methods are proposed: pilot method and phase locked loop (PLL) method. As simulation results show, when the SNR is approximately 5 dB or less, the pilot method provides better performance, compared with the PLL method. When the SNR is approximately 6 dB or more, it can be confirmed that the PLL method outperforms than the pilot method, which is almost same to the theoretical performances. Furthermore, it can be said that the PLL method is very spectrum-efficient than the pilot method since it does not require any pilots. However, it is very difficult and expensive to design the accurate, agile, broadband operating PLL system to compensate the very wide range of Doppler frequency shift.

Design and Full-Scale Experimental Results of a Semi-Active Heave Compensation System for a 200 T Winch

Lifting and lowering a load on the ocean can be a dangerous task but can be made easy and safe by adopting heave compensation (HC) devices. The design and full-scale experimental results of a 3000-m semi-active heave compensation (AHC) system for a 200-T winch are presented in this paper. First, the design requirements are given and the semi-AHC mechanism is chosen. An integrated cylinder with one passive chamber and two active chambers is designed. Then, the capacities of the passive and active chambers are determined. The hydraulic and electrical systems and the control strategies are introduced subsequently. Finally, full-scale factory tests at different sinusoidal wave periods and amplitudes show that the semi-AHC system has a displacement compensation efficiency of 92.9% met the design requirements. In-depth power analysis further shows that the active and passive chambers contribute 20.5% and 72.4% displacement compensation efficiencies, respectively. The efficiency of the passive chamber consists with the 68%-80% passive compensation efficiency from Oceanworks Company and Rexroth Company.

Design and Characterisation of a Fast Steering Mirror Compensation System Based on Double Porro Prisms by a Screw-Ray Tracing Method.

This study proposes a novel FSM compensation system for four degrees of freedom (DOF) laser errors compensation, which has the advantage of shorter optical path length, fewer elements and an easier set-up process, meaning that it can be used at different locations. A commercial software, Zemax, is used to evaluate the function of the proposed FSM compensation system and the mathematical modelling of the proposed FSM compensation system is established by using a skew-ray tracing method. Finally, the proposed FSM compensation system is then verified experimentally using a laboratory-built prototype and the result shows that the proposed FSM compensation system achieves the ability to compensate the 4 DOF of the laser source.

Study on the system design and control method of a semi-active heave compensation system

ABSTRACTThe heave compensation system is essential for the installation of subsea equipment. A new semi-active heave compensation system is designed and the control system is analysed, with the aim of solving heave movement problems during deep-water installation. The heave compensation is implemented with a pulley block system and actuated by a compound hydraulic cylinder. The control system can switch between passive compensation mode and semi-active compensation mode. The state-space equations of both modes are set up based on the mechanical and hydraulic system models of the compensation system. With the state-space equations, three control strategies are compared based on the classic Proportion Integration Differentiation (PID) control, and the limitations of PID control are also analysed. In order to avoid defects of the PID controller, the active disturbance rejection control (ADRC) technology is introduced, and a newly developed second-order ADRC controller is applied in the tension control strategy for heave compensation, which results in improved compensation effect.