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    • 23. 发明授权
    • Digital simulator circuit modifier, network, and method
    • 数字模拟器电路修改器,网络和方法
    • US5805859A
    • 1998-09-08
    • US477149
    • 1995-06-07
    • David J. GirammaThomas E. RothOliver W. KozberMichael G. RobinsonDavid K. Johnson
    • David J. GirammaThomas E. RothOliver W. KozberMichael G. RobinsonDavid K. Johnson
    • G06F17/50G06F9/455
    • G06F17/5022
    • Described is a circuit modifier, network, and method for use with an event-driven digital logic simulator for enforcing consistent evaluation of input pin changes at state elements. The invention automatically interposes a fictitious 0-delay defer agent or processor, at the input pin to state elements such as D Flip-Flops. The interposition of the defer agent is handled by the simulator as follows. Defer agents schedule events related to input state changes on a special time or task queue which is not processed until after all other events have been executed for the current time, including any extra iterations caused by 0-delay scheduling activity. Defer agents or processors are placed in a simulation network just prior to one or more of the input pins of state elements, the effect of which is to delay events that normally would propagate to the input pin of a state element until all other normal simulation events are processed. Once the normal simulation events have been executed, the defer events are executed which permits the inputs of the state elements to change after other simulation events have been executed, thereby ensuring consistent evaluation of pin changes at state elements.
    • 描述了一种与事件驱动的数字逻辑模拟器一起使用的电路修正器,网络和方法,用于在状态元件处执行输入引脚变化的一致评估。 本发明在输入引脚处将虚拟的0延迟延迟器或处理器自动地插入诸如D触发器的状态元件。 延迟代理的插入由仿真器如下处理。 延迟代理程序在特定时间或任务队列上调度与输入状态更改相关的事件,直到所有其他事件已被执行为当前时间,包括由0延迟调度活动引起的任何额外的迭代之后才被处理。 延迟代理或处理器位于状态元素的一个或多个输入引脚之前的模拟网络中,其效果是将通常将传播到状态元素的输入引脚的事件延迟,直到所有其他正常模拟事件 被处理。 一旦执行了正常的模拟事件,执行延迟事件,这允许状态元素的输入在执行其它仿真事件之后改变,从而确保在状态元件处的引脚变化的一致评估。
    • 27. 发明授权
    • Transfer network interface
    • 传输网络接口
    • US5148433A
    • 1992-09-15
    • US322590
    • 1989-03-13
    • David K. JohnsonMark S. Weber
    • David K. JohnsonMark S. Weber
    • G05B19/418G06F11/20H04L29/14
    • G06F11/2038G05B19/4185G06F11/2005H04L69/40G06F11/1658G06F11/2043Y02P90/18
    • A transfer network interface module provides a communication link between a data communications network bus connecting a plurality of processor based devices and a redundant processing system. The redundant processor system has first and second processor based devices communicatively coupled to at least one other remote based device by means of the data communication network. The first processor based device operates on an active status and the second processor based device operates on a backup status until a switch occurs. The switch causes the second processor based device to begin operation on active status. The transfer network interface device is communicatively disposed between the first and second processor based devices and the data communications network and permits continuous communication between either of the first and second processor based devices and the remote processor based device regardless of which of the first and second processor based devices is on active status. Each transfer network interface module has a thumbmwheel switch for setting a unique address and a mutually common address on the data communications network.
    • 传输网络接口模块提供连接多个基于处理器的设备的数据通信网络总线与冗余处理系统之间的通信链路。 冗余处理器系统具有借助于数据通信网络通信地耦合到至少一个其他基于远程的设备的基于第一和第二处理器的设备。 第一基于处理器的设备在活动状态下操作,并且基于第二处理器的设备在备用状态下操作,直到交换机发生。 交换机使得基于第二处理器的设备在活动状态下开始运行。 传输网络接口设备通信地设置在第一和第二基于处理器的设备和数据通信网络之间,并允许基于第一和第二处理器的设备和基于远程处理器的设备之间的连续通信,而不管第一和第二处理器 基于设备的状态处于活动状态。 每个传输网络接口模块具有用于在数据通信网络上设置唯一地址和相互共同的地址的指轮开关。
    • 28. 发明授权
    • Removal of vanadium from phosphoric acid
    • 从磷酸中去除钒
    • US5230876A
    • 1993-07-27
    • US701879
    • 1991-05-17
    • Klaas J. HutterDavid K. JohnsonGene KawakamiGary Long
    • Klaas J. HutterDavid K. JohnsonGene KawakamiGary Long
    • C01B25/238C01G31/00
    • C01B25/238C01G31/003
    • An apparatus for removing vanadium from phosphoric acid includes a precipitator that receives vanadium-containing process-feed phosphoric acid and adds an oxidant to the process-feed phosphoric acid, whereupon precipitates containing phosphorus and vanadium are formed in a phosphoric acid filter feed slurry. The solid precipitate is removed by a filter. The filtrate, after optional further oxidation, is contacted to an ion exchange resin to remove additional vanadium from the filtrate to produce a phosphoric acid product of reduced vanadium content. A first portion of the phosphoric acid product is removed from the apparatus for further use. A reducing agent is added to a second portion of the phosphoric acid product, and the reduced acid is used to strip vanadium from the loaded ion exchange resin. The vanadium-loaded second portion of the phosphoric acid is mixed with fresh phosphoric acid and fed to the precipitator. The phosphoric acid in the precipitator has a phosphate content of from about 40-45 percent, and at least a portion of the phosphoric acid in the precipitator is produced by diluting more concentrated phosphoric acid to the 40-45 percent phosphate range.
    • 用于从磷酸中除去钒的装置包括:沉淀器,其接收含钒工艺进料磷酸并向工艺进料磷酸中加入氧化剂,由此在磷酸过滤器进料浆料中形成含有磷和钒的沉淀。 通过过滤器除去固体沉淀物。 在任选进一步氧化之后,滤液与离子交换树脂接触以从滤液中除去额外的钒,以产生具有降低的钒含量的磷酸产物。 将磷酸产物的第一部分从该装置中除去以供进一步使用。 向磷酸产物的第二部分加入还原剂,还原酸用于从负载的离子交换树脂中剥离钒。 将含钒载体的第二部分磷酸与新鲜的磷酸混合并送入除尘器。 除尘器中的磷酸的磷酸盐含量为约40-45%,并且通过将更浓缩的磷酸稀释至40-45%的磷酸盐范围来产生沉淀器中的至少一部分磷酸。