Abstract: This paper is mainly divided into four parts， the first part is a simple understanding of the credit policy related to accounts receivable related to the theoretical knowledge， which is the full text of the content of The second part mainly wrote the Henan Jin Xinyuan door industry C， L in accounts receivable credit policy aspects of the status quo， enable us to understand some of the problems and The third part is through the company's credit policy re design， illustrates the importance of credit policy in practice， the advantages and disadvantages of using， can be more specific understanding of the credit policy to do the The fourth part is mainly based on the relevant analysis of this paper and the social reality， analyzes the problems of the credit policy of the accounts Through the understanding of this paper several duty， we can account receivable credit policy have a preliminary understanding， of our country should be accounts receivable are facing an understanding of the problem of today' 【关键词】：中小企业； 信用政策；信用风险 Key words: small and medium enterprises; credit policy; credit risk
The graduation project aimed at constant tension release strip volume control， to explore a magnetic brake components for the implementation of the strip tension take a closed-loop volume control Programs include tension controller and magnetic powder brake drive Tension Controller is the key to the whole Volume in Strip the process of release， because too much tension will affect the fluctuations in product The requirements of tension control is put in the whole volume should be maintained in the dynamic process of constant Tension controller design， the use of operational amplifiers for the core components of the PI control Tension sensor to detect the use of strip tension， so that the value of detected tension and tension values set by the tension of the PI controller operation， the automatic adjustment of the excitation voltage magnetic brakes， so that the process of put volume to achieve constant tension Because the release of volume changes in wheel diameter 10 times in the scope of the general， it is through simulation analysis， to prove Drive Tension Controller in volume within a certain range of the Strip will still be able to better control the Through the simulation results and then determineTension Controller component Magnetic brake driver circuit design， is dedicated PWM chip， MOSFET devices for power-driven posed by single-quadrant PWM DC Design and Implementation of the volume of the release process of the better strip tension control， help improve the quality of
