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1. 发明授权

US5349654A Fault tolerant data exchange unit 失效
标题翻译：容错数据交换单元
公开(公告)号：US5349654A
公开(公告)日：1994-09-20
申请号：US839208
申请日：1992-02-20
申请人： David G. Bond , Vincent A. Caluori , Todd Hill , David T. Kirkland , Michael L. Raftery , Derek J. VanAlen
发明人： David G. Bond , Vincent A. Caluori , Todd Hill , David T. Kirkland , Michael L. Raftery , Derek J. VanAlen
IPC分类号： G06F11/00 , G06F11/08 , G06F11/18
CPC分类号： G06F11/185 , G06F11/08 , G06F11/1679 , G06F11/18 , G06F11/187 , G06F11/2007
摘要： A data exchange system for use in a system that includes a plurality of redundant channels (12). A data exchange unit (30) is provided to process data, ensuring that consistent data are used by each of the channels. The data exchange unit votes the data so that an output is provided that is identical in non-faulty channels. The data exchange units communicate over an inter-channel net that includes a consistency port (160), which serves as a separate second fault containment region for each channel, enabling the data exchange system to be Byzantine resilient. If input data are provided by a single one of the redundant channels, the data are distributed to each of the data exchange units for all channels in the system using two rounds of communication. However, if nominally identical data are input to each of the data exchange units in the redundant channels, a single round of communication and a simple voting process are used to determine a consistent output for each channel. A multiplexer (112) is used to select the data source for distribution to the consistency ports of each of the data exchange units. A 16-bit voter circuit (130) in each data exchange unit votes on the data received by the data exchange unit from the consistency ports for all of the channels to determine the output that is used by each channel.
摘要翻译：一种用于包括多个冗余信道（12）的系统中的数据交换系统。提供数据交换单元（30）来处理数据，确保每个通道使用一致的数据。数据交换单元对数据进行投票，以便提供在非故障通道中相同的输出。数据交换单元通过信道间网络进行通信，所述信道间网络包括一致端口（160），其用作每个信道的单独的第二故障容纳区域，使数据交换系统成为拜占庭式的弹性。如果输入数据由冗余信道中的单个信道提供，则使用两轮通信将数据分配给系统中的所有信道的每个数据交换单元。然而，如果将名义上相同的数据输入到冗余信道中的每个数据交换单元，则使用单轮通信和简单投票过程来确定每个信道的一致的输出。多路复用器（112）用于选择数据源以分发给每个数据交换单元的一致端口。每个数据交换单元中的16位选举电路（130）对所有信道的一致性端口对数据交换单元接收的数据进行投票，以确定每个通道使用的输出。

2. 发明授权

US4979191A Autonomous N-modular redundant fault tolerant clock system 失效
标题翻译：自主的N模块冗余容错时钟系统
公开(公告)号：US4979191A
公开(公告)日：1990-12-18
申请号：US352976
申请日：1989-05-17
申请人： David G. Bond , Todd Hill , Paul D. Weis , John R. Woods
发明人： David G. Bond , Todd Hill , Paul D. Weis , John R. Woods
IPC分类号： G06F1/12 , G06F11/18 , H04L7/00
CPC分类号： G06F11/1604 , G06F1/12 , H04L7/0083 , G06F11/184
摘要： A fault tolerant clock system in which synchronization of the clocks continuing to operate after a fault occurs is maintained within a skew limit. The clock system includes a plurality of clock channels (10), each including a clock unit (12) and an isolation port (14). A local clock signal produced by a crystal oscillator (16) is enabled to provide a clock channel output signal while a counter (24) in the clock unit accumulates a predetermined number of local clock pulses. After the predetermined number is reached, the counter disables the clock channel output signal and produces a sync pulse, which is input to a voter block (48). In response to the second sync pulse to be received from each of the clock channels, each voter block produces a load pulse signal that is input to the isolation port of that clock channel. Corresponding isolated load signals are produced by the isolation port and provided to voter blocks (72) in each of the clock units. The voter blocks respond to the second isolated load signal to be received, producing a load enable signal that is input to the counter. Upon receipt of the load enable signal, the counter resumes counting and again enables the clock channel output signal, in synchronization with the other clock channel output signals. Up to N simultaneous faults may be sustained in the clock system, without loss of synchronization in the clock channels that continue to operate properly, so long as 2N+1 clock channels are provided.
摘要翻译：在故障发生之后继续操作的时钟的同步的容错时钟系统保持在偏移极限内。时钟系统包括多个时钟通道（10），每个时钟通道包括时钟单元（12）和隔离端口（14）。由晶体振荡器（16）产生的本地时钟信号能够提供时钟信道输出信号，同时时钟单元中的计数器（24）累积预定数量的本地时钟脉冲。在达到预定数量之后，计数器禁用时钟信道输出信号，并产生输入到选举器块（48）的同步脉冲。响应于要从每个时钟信道接收的第二同步脉冲，每个选择器块产生输入到该时钟信道的隔离端口的负载脉冲信号。对应的隔离负载信号由隔离端口产生并提供给每个时钟单元中的选择器块（72）。选票块响应要接收的第二个隔离负载信号，产生输入到计数器的负载使能信号。当接收到负载使能信号时，计数器恢复计数，并再次使能时钟信道输出信号，与其他时钟信道输出信号同步。只要提供2N + 1个时钟通道，在时钟系统中可以维持多达N个同时故障，而不会在继续正常工作的时钟信道中失去同步。

3. 发明授权

US08732109B1 Structured requirement generation and assessment 有权
标题翻译：结构化要求生成和评估
公开(公告)号：US08732109B1
公开(公告)日：2014-05-20
申请号：US13194005
申请日：2011-07-29
申请人： Ronald Steven Carson , James Warren Foust , Michele Gay Michalski , Sook Kenna Kim , David G. Bond
发明人： Ronald Steven Carson , James Warren Foust , Michele Gay Michalski , Sook Kenna Kim , David G. Bond
IPC分类号： G06F17/00 , G06N5/02
CPC分类号： G06N5/02 , G06F11/008 , G06Q10/06 , G06Q10/10
摘要： A method and apparatus comprising a requirement generator and a quality assessor. The requirement generator is configured to generate a group of elements of a requirement. The quality assessor is configured to identify a quality level for the elements based on words in the elements and quality criteria.
摘要翻译：一种包括需求发生器和质量评估者的方法和装置。需求生成器被配置为生成一组要求的元素。质量评估者被配置为基于元素和质量标准中的单词来识别元素的质量水平。

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