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    • 2. 发明授权
    • Mechanical face seal with a reverse trapezoidal face pattern
    • 机械面密封带反向梯形面型
    • US09574666B2
    • 2017-02-21
    • US14162061
    • 2014-01-23
    • Jason FerrisLarry JacobsChristopher Gray
    • Jason FerrisLarry JacobsChristopher Gray
    • F16J15/34
    • F16J15/3428F16J15/3412
    • An improved mechanical face seal is provided which includes a pair of relatively rotatable seal rings having opposing seal faces. At least one of the seal faces includes a reverse trapezoidal face pattern having a sine wave depth profile wherein individual face features are circumferentially spaced over the seal face. The reverse trapezoidal face pattern serves to generate a hydrodynamic lift which provides a stable separation of the seal faces that permits formation of a fluid film between the seal faces. The individual trapezoidal grooves have a sinusoidal or similarly shaped depth profile wherein the trapezoid shape is arranged with the narrower edge communicating with the high pressure side of the seal, and the wider edge forms a circumferential dam region towards the low pressure side of the seal. Alternatively, the reverse trapezoidal face pattern may also be provided as a primary face pattern on a dry gas seal in combination with a secondary face pattern wherein the faces operate with a controlled gap under normal pressure conditions as well as when the pressure direction across the seal face is reversed.
    • 提供了一种改进的机械面密封件,其包括一对具有相对的密封面的相对可旋转的密封环。 密封面中的至少一个包括具有正弦波深度轮廓的反向梯形面形图案,其中各个面部特征在密封面上周向间隔开。 反向梯形面图案用于产生流体动力升力,其提供允许在密封面之间形成流体膜的密封面的稳定分离。 单个梯形槽具有正弦或类似形状的深度轮廓,其中梯形形状布置成较窄的边缘与密封件的高压侧连通,并且较宽的边缘朝向密封件的低压侧形成周向坝区域。 或者,反向梯形面部图案也可以作为初级面部图案设置在干燥气体密封件上,与次要面部图案相组合,其中在正常压力条件下以及当密封件的压力方向 脸倒转
    • 4. 发明申请
    • Cable jacket sealing, pressurization, and monitoring
    • 电缆护套密封,加压和监测
    • US20080271803A1
    • 2008-11-06
    • US11727112
    • 2007-03-23
    • Dean CorrenDouglas A. LessigChristopher GrayJohn Gray
    • Dean CorrenDouglas A. LessigChristopher GrayJohn Gray
    • F16L55/00
    • F16L39/00F16L41/03H02G9/02
    • An underwater power generating system includes an underwater power generating device, a closed nacelle and a connecting cable system that is provided with an open passage way extending there along that is sealed at one end to the interior of the closed nacelle. The cable system can be used in a number of ways, such as by having the second end being sealed, to prevent air from escaping the closed nacelle, or by having the second end connected to a source of positive pressure thereby permitting the cable to be sufficiently pressurized to provide a positive pressure internally within the closed nacelle that is at least slightly greater than the nacelle at depth pressure, and thus greater than water pressure acting on the exterior of the closed nacelle, to prevent water ingress within the nacelle, as well as to transmit power and/or other data between the nacelle and shore monitoring and control facilities.
    • 一种水下发电系统,包括水下发电装置,封闭机舱和连接电缆系统,该系统具有沿其一端延伸的开放通道,其一端密封在封闭机舱的内部。 电缆系统可以以多种方式使用,例如通过使第二端被密封,以防止空气逸出封闭的机舱,或者通过使第二端连接到正压源,从而允许电缆为 充分加压以在封闭机舱内部提供正压力,其在深度压力下至少比机舱稍大,并且因此大于作用在封闭机舱外部的水压,以防止机舱内的水进入 以便在机舱和岸上监控和控制设施之间传输电力和/或其他数据。
    • 5. 发明授权
    • Method for verifying branch trace history buffer information
    • 验证分支跟踪历史缓冲区信息的方法
    • US06247146B1
    • 2001-06-12
    • US09135065
    • 1998-08-17
    • Travis WheatleyMichael WisorChristopher Gray
    • Travis WheatleyMichael WisorChristopher Gray
    • G06F1100
    • G06F11/3636
    • A method and system for verifying the accuracy of trace data generated by execution of a program on a computer under test, one embodiment of the method comprising scanning the trace data to locate bitmap data corresponding to series of consecutive conditional branches and comparing the number of bits representative of these branches to the number of consecutive conditional branches in the instruction sequence. The trace data includes address entries and bitmap entries. The trace data is scanned in reverse chronological order beginning with the most recent entry to locate an address entry preceding one or more bitmaps which represent a most recent series of conditional branches. Beginning with the instruction at the address contained in the address entry, the program instructions are scanned in program order until a conditional branch is encountered. The branch is counted and the trace data is examined to determine whether the branch was taken and scanning is resumed. The scanning and counting of the conditional branches continues until an instruction which generates a non-bitmap entry is encountered. The number of conditional branches is then compared to the number of bits representative of branches to verify that they are equal. In some embodiments, the target addresses of the branch instructions are also checked to verify that they correspond to the target addresses of the corresponding BTHB entries. Preceding bitmap entries are each checked in this manner until all of the trace data has been verified.
    • 一种用于验证在被测计算机上执行程序产生的跟踪数据的准确性的方法和系统,所述方法的一个实施例包括扫描跟踪数据以定位对应于一系列连续条件分支的位图数据,并比较位数 这些分支的代表在指令序列中连续条件分支的数量。 跟踪数据包括地址条目和位图条目。 跟踪数据以相反的时间顺序扫描,以最新条目开始,以定位表示最近一系列条件分支的一个或多个位图之前的地址条目。 从地址条目中包含的地址的指令开始,以程序顺序扫描程序指令,直到遇到条件分支为止。 对分支进行计数,并检查跟踪数据以确定分支是否被采集并且扫描被恢复。 条件分支的扫描和计数继续,直到遇到生成非位图条目的指令。 然后将条件分支的数量与表示分支的比特数进行比较,以验证它们是相等的。 在一些实施例中,还检查分支指令的目标地址以验证它们对应于相应BTHB条目的目标地址。 前面的位图条目都以这种方式进行检查,直到所有跟踪数据都被验证。
    • 10. 发明授权
    • Code segment default operation determination
    • 代码段默认操作确定
    • US06237078B1
    • 2001-05-22
    • US09137731
    • 1998-08-21
    • Christopher Gray
    • Christopher Gray
    • G06F1576
    • G06F9/30076G06F9/30101G06F9/30189
    • A method for determining the default operating mode of a code segment by determining whether an instruction modifies bits in both the upper-order and lower-order halves of a register. A register is set to a known value and an instruction which operates on the register is subsequently executed. After execution of the instruction, it is determined whether the high-order bits of the register have been modified by the instruction. If the instruction modifies the high-order bits of the register, a first default mode is indicated and, if the instruction does not modify the high-order bits of the register, a second default mode is indicated.
    • 一种用于通过确定指令是否修改寄存器的高阶和低位二位中的位来确定代码段的默认操作模式的方法。 将寄存器设置为已知值,并且随后执行对寄存器进行操作的指令。 在指令执行之后,确定寄存器的高位是否被该指令修改。 如果指令修改寄存器的高位,则指示第一默认模式,如果指令不修改寄存器的高位,则指示第二默认模式。