Internet companies usually have to rely on financing to grow, which puts their founders at risk of losing control. In this situation, the dual ownership structure arises at the historic moment and becomes a powerful w...Internet companies usually have to rely on financing to grow, which puts their founders at risk of losing control. In this situation, the dual ownership structure arises at the historic moment and becomes a powerful weapon for the founders to control. In order to maintain the right of control, most enterprises have chosen the typical structure of the dual ownership system-AB share system, and Alibaba Group has established an upgraded version of the dual ownership structure-partner system in view of its own development characteristics. This paper uses the method of case study, taking Alibaba Group as an example, from the perspective of control rights protection to study the Alibaba partnership system in depth. On the basis of combing and analyzing the protection mechanism of Alibaba's control rights, this paper further compares the AB share system with the partner system, sums up the advantages and limitations of the partner system, and puts forward some relevant solutions. This paper will provide some reference for the research on the dual ownership structure of Chinese Internet companies.展开更多
The mode of arrangement and innovation of governance for corporate rights of control should be in accordance with the global resource disposition opportunities and efficiency competition. Based on rights formulated by...The mode of arrangement and innovation of governance for corporate rights of control should be in accordance with the global resource disposition opportunities and efficiency competition. Based on rights formulated by acts and regulations, this paper establishes models of arrangement for corporate rights of control, and then analyses the composite basic features derived from the models. To conclude, a main frame for the arrangement and innovation of corporate rights of control is put forward based on the real practice of listed companies in China.展开更多
In this paper, for the delay control system: (x) over dot (t)=f[x(t), x(t-1), u(t), t] t is an element of[t(0), t(1)] x(t)=psi(t) t is an element of[t(0), t(1)] with state right endpoint restricted by condition psi(k)...In this paper, for the delay control system: (x) over dot (t)=f[x(t), x(t-1), u(t), t] t is an element of[t(0), t(1)] x(t)=psi(t) t is an element of[t(0), t(1)] with state right endpoint restricted by condition psi(k)[x(t(1))]=0 (k=1,2,..., l) a maximum principle is given. And as a specific example, this paper gives a maximum principle under the condition that partial stares right endpoints be completely fixed. Finally, this paper gives an example to explain the application of the main result of this paper. All the results are suitable for the control systems with multidelay as well.展开更多
为应对数字版权管理中恶意发布者的挑战,提出一种可撤销访问控制加密(Revocable Identity-based Access Control Encryption,RACE)方案。RACE结合结构保持签名、非交互式零知识证明和抗碰撞聚合器,通过可净化的身份基广播加密,确保合法...为应对数字版权管理中恶意发布者的挑战,提出一种可撤销访问控制加密(Revocable Identity-based Access Control Encryption,RACE)方案。RACE结合结构保持签名、非交互式零知识证明和抗碰撞聚合器,通过可净化的身份基广播加密,确保合法发送方传输的密文经净化器处理后与原始密文格式一致。同时,引入撤销机制,通过更新密钥实现用户撤销与密文更新以增强系统的安全性。安全性分析表明,RACE满足“无读”和“无写”规则的安全要求。性能分析表明,RACE在增加安全功能的同时,实现了较低的计算和通信开销,其中解密阶段的计算开销较现有高效方案降低约12%,性能表现良好。展开更多
In recent years, water pollution has become increasingly serious in China. Meanwhile, decrease of water bodies in quality, frequent pollution incidents, safety of drinking water and water shortage have become prominen...In recent years, water pollution has become increasingly serious in China. Meanwhile, decrease of water bodies in quality, frequent pollution incidents, safety of drinking water and water shortage have become prominent day by day. However, water pollution can not be controlled effectively. To clear underlying reasons for increasingly worsening water environment, the external effects of pollution behavior and fictitious property right of pollution control bodies were analyzed using property right theory, and then internal reasons for serious water pollution were discussed. Fi- nally, control measures of water pollution were put forward.展开更多
In this paper,a robust nonlinear free vibration control design using an operator based robust right coprime factorization approach is considered for a flexible plate with unknown input nonlinearity.With considering th...In this paper,a robust nonlinear free vibration control design using an operator based robust right coprime factorization approach is considered for a flexible plate with unknown input nonlinearity.With considering the effect of unknown input nonlinearity from the piezoelectric actuator,operator based controllers are designed to guarantee the robust stability of the nonlinear free vibration control system.Simultaneously,for ensuring the desired tracking performance and reducing the effect of unknown input nonlinearity,operator based tracking compensator and estimation structure are given,respectively.Finally,both simulation and experimental results are shown to verify the effectiveness of the proposed control scheme.展开更多
In the past,arms used in the fields of industry and robotics have been designed not to vibrate by increasing their mass and stiffness.The weight of arms has tended to be reduced to improve speed of operation,and decre...In the past,arms used in the fields of industry and robotics have been designed not to vibrate by increasing their mass and stiffness.The weight of arms has tended to be reduced to improve speed of operation,and decrease the cost of their production.Since the weight saving makes the arms lose their stiffness and therefore vibrate more easily,the vibration suppression control is needed for realizing the above purpose.Incidentally,the use of various smart materials in actuators has grown.In particular,a shape memory alloy(SMA)is applied widely and has several advantages:light weight,large displacement by temperature change,and large force to mass ratio.However,the SMA actuators possess hysteresis nonlinearity between their own temperature and displacement obtained by the temperature.The hysteretic behavior of the SMA actuators affects their control performance.In previous research,an operator-based control system including a hysteresis compensator has been proposed.The vibration of a flexible arm is dealt with as the controlled object;one end of the arm is clamped and the other end is free.The effectiveness of the hysteresis compensator has been confirmed by simulations and experiments.Nevertheless,the feedback signal of the previous designed system has increased exponentially.It is difficult to use the system in the long-term because of the phenomenon.Additionally,the SMA actuator generates and radiates heat because electric current passing through the SMA actuator provides heat,and strain on the SMA actuator is generated.With long-time use of the SMA actuator,the environmental temperature around the SMA actuator varies through radiation of the heat.There exists a risk that the ambient temperature change dealt with as disturbance affects the temperature and strain of the SMA actuator.In this research,a design method of the operator-based control system is proposed considering the long-term use of the system.In the method,the hysteresis characteristics of the SMA actuator and the temperature change around the actuator are considered.The effectiveness of the proposed method is verified by simulations and experiments.展开更多
Modem enterprise theory defines onterprise＇s ownership through the concepts of residual rights of control and claim to residue. It also believes that when they are in homologous, the ownership of enterprise can be ar...Modem enterprise theory defines onterprise＇s ownership through the concepts of residual rights of control and claim to residue. It also believes that when they are in homologous, the ownership of enterprise can be arranged in the best place. When the enterprise is under normal run, shareholders are its owner, but when it goes into bankruptcy, claimers should take place of shareholders becoming the owner of the enterprise. But in China, the ownership of state-owned enterprise （SEE） goes into double misplaces. Management controls the enterprise under the normal run, which leads salaries to seize the earnings and share equities. The state who acts as the shareholder not only lessens investments but also fixes its earnings as much as possible. It gives up the claim to residue, which leads claimers to bear the enterprise＇s residual risks （when the residual income is negative）. When the enterprise goes into bankruptcy, as the shareholder, the state determines whether it can exist or not in order to maximize its own utility. Rights of claimer are being seriously damaged as they can be manipulated freely in the enterprise. Banks＇ bad debts are also in an extremely high level. In this article, the author will establish a model and use the relative data to do technical analysis.展开更多
文摘Internet companies usually have to rely on financing to grow, which puts their founders at risk of losing control. In this situation, the dual ownership structure arises at the historic moment and becomes a powerful weapon for the founders to control. In order to maintain the right of control, most enterprises have chosen the typical structure of the dual ownership system-AB share system, and Alibaba Group has established an upgraded version of the dual ownership structure-partner system in view of its own development characteristics. This paper uses the method of case study, taking Alibaba Group as an example, from the perspective of control rights protection to study the Alibaba partnership system in depth. On the basis of combing and analyzing the protection mechanism of Alibaba's control rights, this paper further compares the AB share system with the partner system, sums up the advantages and limitations of the partner system, and puts forward some relevant solutions. This paper will provide some reference for the research on the dual ownership structure of Chinese Internet companies.
文摘The mode of arrangement and innovation of governance for corporate rights of control should be in accordance with the global resource disposition opportunities and efficiency competition. Based on rights formulated by acts and regulations, this paper establishes models of arrangement for corporate rights of control, and then analyses the composite basic features derived from the models. To conclude, a main frame for the arrangement and innovation of corporate rights of control is put forward based on the real practice of listed companies in China.
文摘In this paper, for the delay control system: (x) over dot (t)=f[x(t), x(t-1), u(t), t] t is an element of[t(0), t(1)] x(t)=psi(t) t is an element of[t(0), t(1)] with state right endpoint restricted by condition psi(k)[x(t(1))]=0 (k=1,2,..., l) a maximum principle is given. And as a specific example, this paper gives a maximum principle under the condition that partial stares right endpoints be completely fixed. Finally, this paper gives an example to explain the application of the main result of this paper. All the results are suitable for the control systems with multidelay as well.
文摘为应对数字版权管理中恶意发布者的挑战,提出一种可撤销访问控制加密(Revocable Identity-based Access Control Encryption,RACE)方案。RACE结合结构保持签名、非交互式零知识证明和抗碰撞聚合器,通过可净化的身份基广播加密,确保合法发送方传输的密文经净化器处理后与原始密文格式一致。同时,引入撤销机制,通过更新密钥实现用户撤销与密文更新以增强系统的安全性。安全性分析表明,RACE满足“无读”和“无写”规则的安全要求。性能分析表明,RACE在增加安全功能的同时,实现了较低的计算和通信开销,其中解密阶段的计算开销较现有高效方案降低约12%,性能表现良好。
文摘In recent years, water pollution has become increasingly serious in China. Meanwhile, decrease of water bodies in quality, frequent pollution incidents, safety of drinking water and water shortage have become prominent day by day. However, water pollution can not be controlled effectively. To clear underlying reasons for increasingly worsening water environment, the external effects of pollution behavior and fictitious property right of pollution control bodies were analyzed using property right theory, and then internal reasons for serious water pollution were discussed. Fi- nally, control measures of water pollution were put forward.
文摘In this paper,a robust nonlinear free vibration control design using an operator based robust right coprime factorization approach is considered for a flexible plate with unknown input nonlinearity.With considering the effect of unknown input nonlinearity from the piezoelectric actuator,operator based controllers are designed to guarantee the robust stability of the nonlinear free vibration control system.Simultaneously,for ensuring the desired tracking performance and reducing the effect of unknown input nonlinearity,operator based tracking compensator and estimation structure are given,respectively.Finally,both simulation and experimental results are shown to verify the effectiveness of the proposed control scheme.
文摘In the past,arms used in the fields of industry and robotics have been designed not to vibrate by increasing their mass and stiffness.The weight of arms has tended to be reduced to improve speed of operation,and decrease the cost of their production.Since the weight saving makes the arms lose their stiffness and therefore vibrate more easily,the vibration suppression control is needed for realizing the above purpose.Incidentally,the use of various smart materials in actuators has grown.In particular,a shape memory alloy(SMA)is applied widely and has several advantages:light weight,large displacement by temperature change,and large force to mass ratio.However,the SMA actuators possess hysteresis nonlinearity between their own temperature and displacement obtained by the temperature.The hysteretic behavior of the SMA actuators affects their control performance.In previous research,an operator-based control system including a hysteresis compensator has been proposed.The vibration of a flexible arm is dealt with as the controlled object;one end of the arm is clamped and the other end is free.The effectiveness of the hysteresis compensator has been confirmed by simulations and experiments.Nevertheless,the feedback signal of the previous designed system has increased exponentially.It is difficult to use the system in the long-term because of the phenomenon.Additionally,the SMA actuator generates and radiates heat because electric current passing through the SMA actuator provides heat,and strain on the SMA actuator is generated.With long-time use of the SMA actuator,the environmental temperature around the SMA actuator varies through radiation of the heat.There exists a risk that the ambient temperature change dealt with as disturbance affects the temperature and strain of the SMA actuator.In this research,a design method of the operator-based control system is proposed considering the long-term use of the system.In the method,the hysteresis characteristics of the SMA actuator and the temperature change around the actuator are considered.The effectiveness of the proposed method is verified by simulations and experiments.
文摘Modem enterprise theory defines onterprise＇s ownership through the concepts of residual rights of control and claim to residue. It also believes that when they are in homologous, the ownership of enterprise can be arranged in the best place. When the enterprise is under normal run, shareholders are its owner, but when it goes into bankruptcy, claimers should take place of shareholders becoming the owner of the enterprise. But in China, the ownership of state-owned enterprise （SEE） goes into double misplaces. Management controls the enterprise under the normal run, which leads salaries to seize the earnings and share equities. The state who acts as the shareholder not only lessens investments but also fixes its earnings as much as possible. It gives up the claim to residue, which leads claimers to bear the enterprise＇s residual risks （when the residual income is negative）. When the enterprise goes into bankruptcy, as the shareholder, the state determines whether it can exist or not in order to maximize its own utility. Rights of claimer are being seriously damaged as they can be manipulated freely in the enterprise. Banks＇ bad debts are also in an extremely high level. In this article, the author will establish a model and use the relative data to do technical analysis.
