公开(公告)号：US08326591B1

公开(公告)日：2012-12-04

申请号：US11941904

申请日：2007-11-16

申请人： Qian Cai ,  Dan Feng ,  Bruce W. McGaughy ,  Jun Kong ,  Rendong Lin

发明人： Qian Cai ,  Dan Feng ,  Bruce W. McGaughy ,  Jun Kong ,  Rendong Lin

IPC分类号： G06F17/50

CPC分类号： G06F17/5036

摘要： In one embodiment of the invention, a method of simulating a circuit is disclosed including partitioning a circuit into a plurality of blocks, each of the plurality of blocks being radio-frequency blocks or non-radio frequency blocks; performing a first simulation of a first simulation type with the radio-frequency blocks to generate output waveforms of the radio-frequency blocks; performing a second simulation of a second simulation type with the non-radio-frequency blocks to generate output waveforms of the non-radio-frequency blocks where the second simulation type differs from the first simulation type; and synchronizing the first simulation and the second simulation together at one or more time steps to generate output waveforms for the circuit.

摘要翻译： 在本发明的一个实施例中，公开了一种模拟电路的方法，包括将电路划分成多个块，所述多个块中的每一个是射频块或非射频块; 利用所述射频块执行第一仿真类型的第一仿真以产生所述射频块的输出波形; 对非射频块进行第二仿真类型的第二仿真，以产生第二仿真类型与第一仿真类型不同的非射频块的输出波形; 以及在一个或多个时间步骤一起同步所述第一仿真和所述第二仿真以产生所述电路的输出波形。

公开(公告)号：US07761279B1

公开(公告)日：2010-07-20

申请号：US11941899

申请日：2007-11-16

申请人： Qian Cai ,  Dan Feng

发明人： Qian Cai ,  Dan Feng

IPC分类号： G06G7/62 ,  G06F17/50

CPC分类号： G06F17/5036

摘要： In one embodiment of the invention, a method of simulating a circuit is disclosed including simulating an analog component of the circuit over a first simulation time period with a first envelope simulation; adaptively switching from simulating the analog component with the first envelope simulation to simulating the analog component with a transient simulation over a second simulation time period; and adaptively switching from simulating the analog component with the transient simulation to simulating the analog component with a second envelope simulation over a third simulation time period. The adaptive switching from the first envelope simulation to the transient simulation may be in response to the envelope simulation accuracy falling below a predetermined level of accuracy in comparison with a transient simulation or in response to the second simulation time period including expected digital transitions where one or more digital events may occur to change the analog input signals to the analog component.

摘要翻译： 在本发明的一个实施例中，公开了一种模拟电路的方法，其包括在第一模拟时间段内利用第一包络模拟来模拟所述电路的模拟分量; 自适应地切换模拟模拟组件与第一包络模拟，以在第二模拟时间段内用瞬态模拟模拟模拟组件; 并通过第三个模拟时间段，利用第二个包络模拟，自适应地从模拟模拟模拟瞬态仿真模拟模拟模拟组件。 从第一包络线模拟到瞬态模拟的自适应切换可以响应于与瞬态模拟相比，包络模拟精度低于预定精度水平，或响应于第二模拟时间段，包括期望的数字转换，其中一个或 可能会发生更多的数字事件，以将模拟输入信号改变为模拟组件。

公开(公告)号：US08762122B1

公开(公告)日：2014-06-24

申请号：US12832872

申请日：2010-07-08

申请人： Qian Cai ,  Dan Feng

发明人： Qian Cai ,  Dan Feng

IPC分类号： G06F17/50 ,  G06G7/62

CPC分类号： G06F17/5036

摘要： In one embodiment of the invention, a method of simulating a circuit is disclosed including simulating an analog component of the circuit over a first simulation time period with a first envelope simulation; adaptively switching from simulating the analog component with the first envelope simulation to simulating the analog component with a transient simulation over a second simulation time period; and adaptively switching from simulating the analog component with the transient simulation to simulating the analog component with a second envelope simulation over a third simulation time period. The adaptive switching from the first envelope simulation to the transient simulation may be in response to the envelope simulation accuracy falling below a predetermined level of accuracy in comparison with a transient simulation or in response to the second simulation time period including expected digital transitions where one or more digital events may occur to change the analog input signals to the analog component.

摘要翻译： 在本发明的一个实施例中，公开了一种模拟电路的方法，其包括在第一模拟时间段内利用第一包络模拟来模拟所述电路的模拟分量; 自适应地切换模拟模拟组件与第一包络模拟，以在第二模拟时间段内用瞬态模拟模拟模拟组件; 并通过第三个模拟时间段，利用第二个包络模拟，自适应地从模拟模拟模拟瞬态仿真模拟模拟模拟组件。 从第一包络线模拟到瞬态模拟的自适应切换可以响应于与瞬态模拟相比，包络模拟精度低于预定精度水平，或响应于第二模拟时间段包括期望的数字转换，其中一个或 可能会发生更多的数字事件，以将模拟输入信号改变为模拟组件。

公开(公告)号：US08645460B2

公开(公告)日：2014-02-04

申请号：US13063934

申请日：2008-10-07

申请人： Dan Feng ,  Liping Pang ,  Yulai Xie ,  Fang Wang ,  Zhongying Niu ,  Ke Zhou ,  Juan Wang ,  Yinliang Yue ,  Xudong Tu ,  Shuibing He ,  Chengtao Lu

发明人： Dan Feng ,  Liping Pang ,  Yulai Xie ,  Fang Wang ,  Zhongying Niu ,  Ke Zhou ,  Juan Wang ,  Yinliang Yue ,  Xudong Tu ,  Shuibing He ,  Chengtao Lu

IPC分类号： G06F15/16

CPC分类号： G06F3/061 ,  G06F3/062 ,  G06F3/0643 ,  G06F3/067 ,  G06F2213/0038

摘要： A method for managing an object-based storage system is provided. The object-based storage system includes root objects, partition objects, collection objects, user objects and function objects. The function objects include user function objects and system function objects. The user function objects respond to the client request, so that the existing data-processing tasks requested by the client are moved to the OBSD to be completed, so as to achieve the purposes for saving the network storage bandwidth and improving the security of the stored data, etc. The system function objects execute the system management function, so that the management of the bottom of disks management of the file system and database system is completed by the OBSD. That can be easily realized in automatic data backup, load balancing and other functions in the storage system. The user function objects and system function objects can be customized by the user.

摘要翻译： 提供了一种用于管理基于对象的存储系统的方法。 基于对象的存储系统包括根对象，分区对象，集合对象，用户对象和功能对象。 函数对象包括用户函数对象和系统函数对象。 用户功能对象响应客户端请求，使客户端请求的现有数据处理任务移动到OBSD完成，以达到节省网络存储带宽和提高存储的安全性的目的 数据等。系统功能对象执行系统管理功能，使OBSD完成文件系统和数据库系统的磁盘管理底部的管理。 在存储系统中的自动数据备份，负载平衡等功能中可以轻松实现。 用户功能对象和系统功能对象可以由用户自定义。

公开(公告)号：US08352731B2

公开(公告)日：2013-01-08

申请号：US12425407

申请日：2009-04-17

申请人： Ke Zhou ,  Dan Feng ,  Zhongying Niu ,  Tianming Yang ,  Qinhua Yan ,  Dongliang Lei ,  Wei Yan

发明人： Ke Zhou ,  Dan Feng ,  Zhongying Niu ,  Tianming Yang ,  Qinhua Yan ,  Dongliang Lei ,  Wei Yan

IPC分类号： H04L29/06 ,  G06F17/30

CPC分类号： H04L67/1097 ,  H04L63/101

摘要： A secure decentralized storage system provides scalable security by addressing the performance bottleneck of the security manager and the complexity issue of security administration in large-scale storage systems. The storage system includes: an application client for accessing a file system using a plurality of storage devices and transmitting a command to a storage device; a storage device for storing data and access control entries associated to the data, analyzing the command from the client and performing corresponding operations of the command; a metadata server for storing and managing metadata, such as location and length information of data and system configuration; and a security manager for storing and managing global access control entries and policies of the system and performing the access policy and privilege control according to the global access control entries and policies, such as changing the priority and inheritance rule of access control entries, adding and deleting the access control entries.

摘要翻译： 安全的分散存储系统通过解决安全管理器的性能瓶颈以及大规模存储系统中安全管理的复杂性问题，提供可扩展的安全性。 存储系统包括：应用客户机，用于使用多个存储设备访问文件系统并向存储设备发送命令; 用于存储与数据相关联的数据和访问控制条目的存储装置，分析来自客户机的命令并执行命令的相应操作; 用于存储和管理诸如数据和系统配置的位置和长度信息的元数据的元数据服务器; 以及用于存储和管理系统的全局访问控制条目和策略的安全管理器，并且根据全局访问控制条目和策略执行访问策略和特权控制，诸如改变访问控制条目的优先级和继承规则，添加和 删除访问控制条目。

公开(公告)号：US20110167113A1

公开(公告)日：2011-07-07

申请号：US13063934

申请日：2008-10-07

申请人： Dan Feng ,  Liping Pang ,  Yulai Xie ,  Fang Wang ,  Zhongying Niu ,  Ke Zhou ,  Juan Wang ,  Yinliang Yue ,  Xudong Tu ,  Shuibing He ,  Chengtao Lu

发明人： Dan Feng ,  Liping Pang ,  Yulai Xie ,  Fang Wang ,  Zhongying Niu ,  Ke Zhou ,  Juan Wang ,  Yinliang Yue ,  Xudong Tu ,  Shuibing He ,  Chengtao Lu

IPC分类号： G06F15/16

CPC分类号： G06F3/061 ,  G06F3/062 ,  G06F3/0643 ,  G06F3/067 ,  G06F2213/0038

摘要： A method for managing an object-based storage system is provided. The object-based storage system includes root objects, partition objects, collection objects, user objects and function objects. The function objects include user function objects and system function objects. The user function objects respond to the client request, so that the existing data-processing tasks requested by the client are moved to the OBSD to be completed, so as to achieve the purposes for saving the network storage bandwidth and improving the security of the stored data, etc. The system function objects execute the system management function, so that the management of the bottom of disks management of the file system and database system is completed by the OBSD. That can be easily realized in automatic data backup, load balancing and other functions in the storage system. The user function objects and system function objects can be customized by the user. The management and processing method of the data of the traditional storage system will be changed to improve the performance of the storage system.

摘要翻译： 提供了一种用于管理基于对象的存储系统的方法。 基于对象的存储系统包括根对象，分区对象，集合对象，用户对象和功能对象。 函数对象包括用户函数对象和系统函数对象。 用户功能对象响应客户端请求，使客户端请求的现有数据处理任务移动到OBSD完成，以达到节省网络存储带宽和提高存储的安全性的目的 数据等。系统功能对象执行系统管理功能，使OBSD完成文件系统和数据库系统的磁盘管理底部的管理。 可以轻松实现自动数据备份，负载平衡等存储系统中的功能。 用户功能对象和系统功能对象可以由用户自定义。 改变传统存储系统数据的管理和处理方法，提高存储系统的性能。

公开(公告)号：US08195440B2

公开(公告)日：2012-06-05

申请号：US12372608

申请日：2009-02-17

申请人： Dan Feng ,  Joel R. Phillips ,  Kenneth Kundert

发明人： Dan Feng ,  Joel R. Phillips ,  Kenneth Kundert

IPC分类号： G06F17/50

CPC分类号： G06F17/5036

摘要： Described is a process for performing an improved mixed frequency-time algorithm to simulate responses of a circuit that receives a periodic sample signal and at least one information signal. The process selects a set of evenly spaced distinct time points and a set of reference time points. Each of the reference points is associated with a distinct time point, and a reference time point is a signal period away from its respective distinct time point. The process finds a first set of relationships between the values at the distinct time points and the values the reference time points. The process also finds a second set of relationships between the values at the distinct time points and the values at the reference time points. The process then combines the first and second sets of relationships to establish a system of nonlinear equations in terms of the values at the distinct time points only. By solving the system of nonlinear equations, the process finds simulated responses of the circuit in time domain. The process then converts the simulated circuit responses from time domain to frequency domain.

摘要翻译： 描述了一种用于执行改进的混合频率 - 时间算法来模拟接收周期性采样信号的电路和至少一个信息信号的响应的过程。 该过程选择一组均匀间隔不同的时间点和一组参考时间点。 每个参考点与不同的时间点相关联，并且参考时间点是远离其各自的不同时间点的信号周期。 该过程在不同时间点的值和参考时间点之间找到第一组关系。 该过程还在不同时间点的值和参考时间点的值之间找到第二组关系。 然后，该过程组合第一组和第二组关系，以仅在不同时间点处建立非线性方程组的系数。 通过求解非线性方程组，该过程在时域中发现电路的仿真响应。 然后，该过程将模拟电路响应从时域转换到频域。

公开(公告)号：US07774176B2

公开(公告)日：2010-08-10

申请号：US11303049

申请日：2005-12-14

申请人： Fangyi Rao ,  Dan Feng

发明人： Fangyi Rao ,  Dan Feng

IPC分类号： G06F17/50

CPC分类号： G06F17/5036

摘要： A pertubative approach based on the Born approximation resolves weakly nonlinear circuit models without requiring explicit high-order device derivatives. Convergence properties and the relation to Volterra series are discussed. According to the disclosed methods, second and third order intermodulation products (IM2, IM3) and intercept points (IP2, IP3) can be calculated by second and third order Born approximations under weakly nonlinear conditions. A diagrammatic representation of nonlinear interactions is presented. Using this diagrammatic technique, both Volterra series and Born approximations can be constructed in a systematic way. The method is generalized to calculate other high-order nonlinear effects such as IMn (nth order intermodulation product) and IPn (nth order intermodulation intercept point). In general, the equations are developed in harmonic form and can be implemented in both time and frequency domains for analog and RF circuits.

摘要翻译： 基于Born近似的一种运动方法解决了弱非线性电路模型，而不需要明确的高阶器件衍生。 讨论了收敛性和与Volterra系列的关系。 根据所公开的方法，可以在弱非线性条件下通过二阶和三阶Born近似来计算二阶互调产物（IM2，IM3）和截取点（IP2，IP3）。 介绍了非线性相互作用的图解表示。 使用这种图解技术，可以系统地构建Volterra系列和Born近似。 该方法被广泛用于计算其他高阶非线性效应，如IMn（n阶互调乘积）和IPn（n阶互调截取点）。 通常，等式以谐波形式开发，并且可以在时域和频域上实现模拟和RF电路。

公开(公告)号：US20090282240A1

公开(公告)日：2009-11-12

申请号：US12425407

申请日：2009-04-17

申请人： KE ZHOU ,  Dan Feng ,  Zhongying Niu ,  Tianming Yang ,  Qinhua Yan ,  Dongliang Lei ,  Wei Yan

发明人： KE ZHOU ,  Dan Feng ,  Zhongying Niu ,  Tianming Yang ,  Qinhua Yan ,  Dongliang Lei ,  Wei Yan

IPC分类号： H04L29/06 ,  G06F15/16

CPC分类号： H04L67/1097 ,  H04L63/101

摘要： A secure decentralized storage system provides scalable security by addressing the performance bottleneck of the security manager and the complexity issue of security administration in large-scale storage systems. The storage system includes: an application client for accessing a file system using a plurality of storage devices and transmitting a command to a storage device; a storage device for storing data and access control entries associated to the data, analyzing the command from the client and performing corresponding operations of the command; a metadata server for storing and managing metadata, such as location and length information of data and system configuration; and a security manager for storing and managing global access control entries and policies of the system and performing the access policy and privilege control according to the global access control entries and policies, such as changing the priority and inheritance rule of access control entries, adding and deleting the access control entries.

摘要翻译： 安全的分散存储系统通过解决安全管理器的性能瓶颈以及大规模存储系统中安全管理的复杂性问题，提供可扩展的安全性。 存储系统包括：应用客户机，用于使用多个存储设备访问文件系统并向存储设备发送命令; 用于存储与数据相关联的数据和访问控制条目的存储装置，分析来自客户机的命令并执行命令的相应操作; 用于存储和管理诸如数据和系统配置的位置和长度信息的元数据的元数据服务器; 以及用于存储和管理系统的全局访问控制条目和策略的安全管理器，并且根据全局访问控制条目和策略执行访问策略和特权控制，诸如改变访问控制条目的优先级和继承规则，添加和 删除访问控制条目。

公开(公告)号：US08949099B1

公开(公告)日：2015-02-03

申请号：US12618920

申请日：2009-11-16

申请人： Xiaolue Lai ,  Dan Feng ,  Yu Zhu

发明人： Xiaolue Lai ,  Dan Feng ,  Yu Zhu

IPC分类号： G06F17/50 ,  G01R29/26

CPC分类号： G06F17/5036

摘要： In a circuit simulation tool in a computer system having one or more computer processors and computer-readable storage, a method for characterizing a driven oscillator circuit having an oscillator coupled to a time-varying input signal includes retrieving information provided in a circuit description of the oscillator circuit. The method also includes forming a frequency-domain harmonic balance equation for the oscillator circuit using the retrieved information provided in the circuit description of the oscillator circuit. The harmonic balance equation includes a first differential operator in a frequency domain of the input signal and a product of a differential operator in a second frequency domain of the oscillator and a frequency variable of the oscillator. The frequency variable is independent of the frequency domain of the input signal. The method further includes solving the harmonic balance equation to obtain a waveform description of the oscillator circuit.

摘要翻译： 在具有一个或多个计算机处理器和计算机可读存储器的计算机系统中的电路仿真工具中，用于表征具有耦合到时变输入信号的振荡器的从动振荡器电路的方法包括检索在电路描述中提供的信息 振荡电路。 该方法还包括使用在振荡器电路的电路描述中提供的检索信息为振荡器电路形成频域谐波平衡方程。 谐波平衡方程包括输入信号的频域中的第一微分算子和振荡器的第二频域中的微分算子与振荡器的频率变量的乘积。 频率变量与输入信号的频域无关。 该方法还包括求解谐波平衡方程以获得振荡器电路的波形描述。