This paper studies the evolutionary process of cooperative behavior in a public goods game model with heterogeneous investment strategies in square lattices.In the proposed model,players are divided into defectors,coo...This paper studies the evolutionary process of cooperative behavior in a public goods game model with heterogeneous investment strategies in square lattices.In the proposed model,players are divided into defectors,cooperators and discreet investors.Among these,defectors do not participate in investing,discreet investors make heterogeneous investments based on the investment behavior and cooperation value of their neighbors,and cooperators invest equally in each neighbor.In real life,heterogeneous investment is often accompanied by time or economic costs.The discreet investors in this paper pay a certain price to obtain their neighbors'investment behavior and cooperation value,which quantifies the time and economic costs of the heterogeneous investment process.The results of Monte Carlo simulation experiments in this study show that discreet investors can effectively resist the invasion of the defectors,form a stable cooperative group and expand the cooperative advantage in evolution.However,when discreet investors pay too high a price,they lose their strategic advantage.The results in this paper help us understand the role of heterogeneous investment in promoting and maintaining human social cooperation.展开更多
五年前Autodesk收购了Discreet,现在Discreet将正式更名为Autodesk传媒和娱乐部,将来Discreet会变成我们高端系统产品名称的一部分,以后就统称我们是Autodesk.至于说Autodesk是做什么的呢? Auto CAD等被广泛应用的日常绘图工具就是Autod...五年前Autodesk收购了Discreet,现在Discreet将正式更名为Autodesk传媒和娱乐部,将来Discreet会变成我们高端系统产品名称的一部分,以后就统称我们是Autodesk.至于说Autodesk是做什么的呢? Auto CAD等被广泛应用的日常绘图工具就是Autodesk的产品.高清的目标就是集中在未来内容怎样进一步提升、内容怎么样能够吸引更多人的眼光,Discreet所做的就是让艺术家的创意能够充分发扬,只要有想象力,我们就让它能够得以实现,让用户的梦想能够成真.展开更多
Discreet在中国的认证体系正式建于2001年。Discreet认证教师（DCI）和认证工程师（DEC）证书由DTC（Discreet Training Center)即Discreet授权培训中心颁发，目前全国范围内正式授权的DTC有近百家。只有参加了DTC培训，并通过了在线考...Discreet在中国的认证体系正式建于2001年。Discreet认证教师（DCI）和认证工程师（DEC）证书由DTC（Discreet Training Center)即Discreet授权培训中心颁发，目前全国范围内正式授权的DTC有近百家。只有参加了DTC培训，并通过了在线考试，才能获得由Discreet公司签发的认证证书。展开更多
With the increased number of PMUs in the power grid, effective high speed, realtime methods to ascertain relevant data for situational awareness are needed. Several techniques have used data from PMUs in conjunction w...With the increased number of PMUs in the power grid, effective high speed, realtime methods to ascertain relevant data for situational awareness are needed. Several techniques have used data from PMUs in conjunction with state estimation to assess system stability and event detection. However, these techniques require system topology and a large computational time. This paper presents a novel approach that uses real-time PMU data streams without the need of system connectivity or additional state estimation. The new development is based on the approximation of the eigenvalues related to the decoupled discreet-time power flow Jacobian matrix using direct openPDC data in real-time. Results are compared with other methods, such as Prony’s method, which can be too slow to handle big data. The newly developed Discreet-Time Jacobian Eigenvalue Approximation (DDJEA) method not only proves its accuracy, but also shows its effectiveness with minimal computational time: an essential element when considering situational awareness.展开更多
基金Project supported by the Open Foundation of Key Laboratory of Software Engineering of Yunnan Province(Grant Nos.2020SE308 and 2020SE309).
文摘This paper studies the evolutionary process of cooperative behavior in a public goods game model with heterogeneous investment strategies in square lattices.In the proposed model,players are divided into defectors,cooperators and discreet investors.Among these,defectors do not participate in investing,discreet investors make heterogeneous investments based on the investment behavior and cooperation value of their neighbors,and cooperators invest equally in each neighbor.In real life,heterogeneous investment is often accompanied by time or economic costs.The discreet investors in this paper pay a certain price to obtain their neighbors'investment behavior and cooperation value,which quantifies the time and economic costs of the heterogeneous investment process.The results of Monte Carlo simulation experiments in this study show that discreet investors can effectively resist the invasion of the defectors,form a stable cooperative group and expand the cooperative advantage in evolution.However,when discreet investors pay too high a price,they lose their strategic advantage.The results in this paper help us understand the role of heterogeneous investment in promoting and maintaining human social cooperation.
文摘五年前Autodesk收购了Discreet,现在Discreet将正式更名为Autodesk传媒和娱乐部,将来Discreet会变成我们高端系统产品名称的一部分,以后就统称我们是Autodesk.至于说Autodesk是做什么的呢? Auto CAD等被广泛应用的日常绘图工具就是Autodesk的产品.高清的目标就是集中在未来内容怎样进一步提升、内容怎么样能够吸引更多人的眼光,Discreet所做的就是让艺术家的创意能够充分发扬,只要有想象力,我们就让它能够得以实现,让用户的梦想能够成真.
文摘Discreet在中国的认证体系正式建于2001年。Discreet认证教师（DCI）和认证工程师（DEC）证书由DTC（Discreet Training Center)即Discreet授权培训中心颁发，目前全国范围内正式授权的DTC有近百家。只有参加了DTC培训，并通过了在线考试，才能获得由Discreet公司签发的认证证书。
文摘With the increased number of PMUs in the power grid, effective high speed, realtime methods to ascertain relevant data for situational awareness are needed. Several techniques have used data from PMUs in conjunction with state estimation to assess system stability and event detection. However, these techniques require system topology and a large computational time. This paper presents a novel approach that uses real-time PMU data streams without the need of system connectivity or additional state estimation. The new development is based on the approximation of the eigenvalues related to the decoupled discreet-time power flow Jacobian matrix using direct openPDC data in real-time. Results are compared with other methods, such as Prony’s method, which can be too slow to handle big data. The newly developed Discreet-Time Jacobian Eigenvalue Approximation (DDJEA) method not only proves its accuracy, but also shows its effectiveness with minimal computational time: an essential element when considering situational awareness.
