At present, China＇s equity crowd-funding platform development like a raging fire, its business model is financing online for small and medium-sized enterprises, many investors to participate in the same project, whil...At present, China＇s equity crowd-funding platform development like a raging fire, its business model is financing online for small and medium-sized enterprises, many investors to participate in the same project, while equity in return for a platform to receive a certain percentage of service charge. However, no related domestic regulatory measures, divorced from a legal gray zone, improper operation may become a pool of funds to engage in illegal fund-raising, illegal securities activities. Therefore, this article is based on two domestic representative platform-＂Angercrunch＂and ＂Dajiatou＂ to raise public equity, the comparative study of the problem currently facing a series of recommendations, including the introduction of regulation, improve the legal system, conduct investor risk education and self-education, etc.展开更多
Chinese traditional family-based society is the legal basis for political, patriarchal hierarchy and national politics Consistent hierarchy, as represented by the family law civil law is to adjust the traditional soci...Chinese traditional family-based society is the legal basis for political, patriarchal hierarchy and national politics Consistent hierarchy, as represented by the family law civil law is to adjust the traditional social relations, maintaining the main legal norms of social order, Family law as one of the most important traditional Chinese society, the legal system, and the state law regulating social order constitute the dual legal structure. And its fundamental purpose is to maintain social harmony and stability of the feudal rule of order.展开更多
In order to improve the frequency response and anti-interference characteristics of the smart electromechanical actuator(EMA)system,and aiming at the force fighting problem when multiple actuators work synchronously,a...In order to improve the frequency response and anti-interference characteristics of the smart electromechanical actuator(EMA)system,and aiming at the force fighting problem when multiple actuators work synchronously,a multi input multi output(MIMO)position difference cross coupling control coordinated strategy based on double‑closed-loop load feedforward control is proposed and designed.In this strategy,the singular value method of return difference matrix is used to design the parameter range that meets the requirements of system stability margin,and the sensitivity function and the H_(∞)norm theory are used to design and determine the optimal solution in the obtained parameter stability region,so that the multi actuator system has excellent synchronization,stability and anti-interference.At the same time,the mathematical model of the integrated smart EMA system is established.According to the requirements of point-to-point control,the controller of double-loop control and load feedforward compensation is determined and designed to improve the frequency response and anti-interference ability of single actuator.Finally,the 270 V high-voltage smart EMA system experimental platform is built,and the frequency response,load feedforward compensation and coordinated control experiments are carried out to verify the correctness of the position difference cross coupling control strategy and the rationality of the parameter design,so that the system can reach the servo control indexes of bandwidth 6 Hz,the maximum output force 20000 N and the synchronization error≤0.1 mm,which effectively solves the problem of force fighting.展开更多
文摘At present, China＇s equity crowd-funding platform development like a raging fire, its business model is financing online for small and medium-sized enterprises, many investors to participate in the same project, while equity in return for a platform to receive a certain percentage of service charge. However, no related domestic regulatory measures, divorced from a legal gray zone, improper operation may become a pool of funds to engage in illegal fund-raising, illegal securities activities. Therefore, this article is based on two domestic representative platform-＂Angercrunch＂and ＂Dajiatou＂ to raise public equity, the comparative study of the problem currently facing a series of recommendations, including the introduction of regulation, improve the legal system, conduct investor risk education and self-education, etc.
文摘Chinese traditional family-based society is the legal basis for political, patriarchal hierarchy and national politics Consistent hierarchy, as represented by the family law civil law is to adjust the traditional social relations, maintaining the main legal norms of social order, Family law as one of the most important traditional Chinese society, the legal system, and the state law regulating social order constitute the dual legal structure. And its fundamental purpose is to maintain social harmony and stability of the feudal rule of order.
基金supported by the National Natural Science Foundation of China(No.52077100)the Aviation Science Foundation(No.201958052001)
文摘In order to improve the frequency response and anti-interference characteristics of the smart electromechanical actuator(EMA)system,and aiming at the force fighting problem when multiple actuators work synchronously,a multi input multi output(MIMO)position difference cross coupling control coordinated strategy based on double‑closed-loop load feedforward control is proposed and designed.In this strategy,the singular value method of return difference matrix is used to design the parameter range that meets the requirements of system stability margin,and the sensitivity function and the H_(∞)norm theory are used to design and determine the optimal solution in the obtained parameter stability region,so that the multi actuator system has excellent synchronization,stability and anti-interference.At the same time,the mathematical model of the integrated smart EMA system is established.According to the requirements of point-to-point control,the controller of double-loop control and load feedforward compensation is determined and designed to improve the frequency response and anti-interference ability of single actuator.Finally,the 270 V high-voltage smart EMA system experimental platform is built,and the frequency response,load feedforward compensation and coordinated control experiments are carried out to verify the correctness of the position difference cross coupling control strategy and the rationality of the parameter design,so that the system can reach the servo control indexes of bandwidth 6 Hz,the maximum output force 20000 N and the synchronization error≤0.1 mm,which effectively solves the problem of force fighting.
