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    • 31. 发明申请
    • Method of Determining Boundary Interface Changes in a Natural Resource Deposit
    • 确定自然资源存量边界界面变化的方法
    • US20030220739A1
    • 2003-11-27
    • US09833791
    • 2001-04-13
    • Lockheed Martin Corp.
    • Mr. Walter K. FeldmanMr. Daniel P. Mazzola
    • G06F019/00
    • G01V7/06
    • Abstract of DisclosureA method of determining changes in the boundary interface in a sub-surface oil reservoir between the to-be-recovered oil and a driveout fluid, such as steam, uses time-displaced gravity gradient measurements to provide an indication of the changes in the gravity gradient over time. The measured data are subject to simulated annealing optimization to find the global minimum that best represents the observed values within the solution space. The optimization process includes establishing an appropriately constrained model of the oil reservoir and a quantized set of mathematically related parameters that define the model. Successive models are perturbed and evaluated from a figure of merit standpoint until a global minimum that best describes the measured time-lapse data is found.
    • 公开摘要确定要回收的油和诸如蒸汽的驱出流体之间的次表面油藏中的边界界面的变化的方法使用时间偏移重力梯度测量来提供变化的指示 在重力梯度随时间推移。 测量数据经过模拟退火优化,以找到最佳表示解空间内观测值的全局最小值。 优化过程包括建立油藏的适当约束模型和定义模型的量化数学相关参数集合。 连续模型是从品质观点的角度进行扰动和评估,直到找到最佳描述测量的延时数据的全局最小值。
    • 32. 发明授权
    • Low-noise sigma-delta analog-to-digital converter
    • 低噪声Σ-Δ模数转换器
    • US6160506A
    • 2000-12-12
    • US260230
    • 1999-03-01
    • Leopold Ernest Pellon
    • Leopold Ernest Pellon
    • H03M1/12G01S7/03G01S7/285H01P5/18H03H7/48H03M3/02H03M3/04H03M3/00
    • H03M3/39H03M3/402H03M3/424H03M3/456
    • A sigma-delta analog-to-digital feedback converter arrangement (10) achieves low noise and a wide dynamic range by use of a directional coupler (18) as a summing device for generating the difference signal on which the forward sigma-delta analog-to-digital converter (32) operates. The feedback is provided by a digital-to-analog reconstructor (36), which applies the reconstructed analog signal to the tap (18.sub.3) of the directional coupler (18), in which the feedback signal is summed with the analog input signal. A low-noise amplifier (28) is coupled to the output of the directional coupler (18) at which the difference signal appears, so the dynamic range of the signal traversing the low-noise amplifier is small. The high isolation between the tap (18.sub.3) of the directional coupler (18) and the source of analog signals allows the use of an input bandpass filter (16).
    • Σ-Δ模数转换器装置(10)通过使用定向耦合器(18)作为求和装置来实现低噪声和宽动态范围,用于产生差分信号,在该差分信号上,正向Σ-Δ模拟 - 数字转换器(32)工作。 该反馈由数模比重构器(36)提供,该重构器将重建的模拟信号施加到定向耦合器(18)的抽头(183),在该模拟信号中反馈信号与模拟输入信号相加。 低噪声放大器(28)耦合到定向耦合器(18)的出现差分信号的输出,因此穿过低噪声放大器的信号的动态范围很小。 定向耦合器(18)的抽头(183)与模拟信号源之间的高隔离允许使用输入带通滤波器(16)。
    • 36. 发明授权
    • Combined residual and analysis-by-synthesis pitch-dependent gain
estimation for linear predictive coders
    • 用于线性预测编码器的组合残差和逐合成音调依赖增益估计
    • US6073093A
    • 2000-06-06
    • US172503
    • 1998-10-14
    • Richard Louis Zinser, Jr.
    • Richard Louis Zinser, Jr.
    • G10L11/04G10L19/12
    • G10L19/09
    • A vocoder transmitter (12) sends coded speech to a vocoder receiver (16) over a limited-bandwidth channel (14). The transmitter includes a LPC-residual-based first gain estimator (46), which gain value works well with women's voices, but less so with men's. A second, analysis-by-synthesis, gain estimator (42) therein, uses a unit-gain version (342) of the receiver's synthesizer, whose input (24) and output (310) speech power is estimated, to produce the second gain value from their ratio (312). The second gain value has been found to work well with men's voices, but to produce "explosive" artifacts with women's. A combiner (518) weights these two gain estimates, under control of the estimated pitch, to produce the vocoder gain estimate transmitted to the vocoder receiver (16). In a particular embodiment the first gain estimate predominates at low pitch periods, and the second gain estimate at higher ones, with crossover at about 45 sample lags for an 8000 Hz sampling rate.
    • 声码器发射器(12)通过有限带宽信道(14)将编码语音发送到声码器接收器(16)。 发射机包括基于LPC残差的第一增益估计器(46),该增益值对于女性的声音效果良好,但与男性不同。 第二个合成分析增益估计器(42)使用其输入(24)和输出(310)语音功率被估计的接收机合成器的单位增益版本(342),以产生第二增益 价值(312)。 已经发现第二个增益值与男性的声音一致,但与妇女产生“爆炸性”的文物。 组合器(518)在估计音调的控制下对这两个增益估计进行加权,以产生发送到声码器接收器(16)的声码器增益估计。 在特定实施例中,第一增益估计在低音调周期处占主导地位,而对于8000Hz采样率,在大约45个采样处的交叉的较高频率处的第二增益估计滞后。
    • 37. 发明授权
    • Ultra-low-profile tube-type magnetics
    • 超薄型管型磁性材料
    • US6040753A
    • 2000-03-21
    • US287157
    • 1999-04-06
    • Sriram RamakrishnanRobert Louis SteigerwaldWilliam Hull Bicknell
    • Sriram RamakrishnanRobert Louis SteigerwaldWilliam Hull Bicknell
    • H01F17/00H01F27/28H01F5/00
    • H01F17/0033H01F27/2804
    • A low-profile transformer or inductor includes a leg of a magnetically permeable core. A tube-type winding arrangement is made by use of a flat, flexible dielectric sheet, on one side of which a broad conductive area is affixed, and on the other side of which a plurality of mutually parallel elongated regions are affixed. The dielectric sheet is rolled into a tube defining a parting line which is perpendicular to the axes of elongation of the conductive strips. The discontinuous elongated strips are formed into a continuous winding by means of stitches. The stitches may be through vias extending through overlapping regions of the tube to interconnect ends of the strip conductors, or may be generated by an HDI conductor overlying the ends of the strip conductors, with through vias making connections to the ends of the strip conductors and to HDI conductors.
    • 低调的变压器或电感器包括一个可渗透磁芯的支脚。 管式绕组装置通过使用平坦的柔性电介质片材制成,其一侧上具有宽的导电区域,并且在另一侧上固定有多个相互平行的细长区域。 将电介质片轧制成限定与导电条的伸长轴垂直的分型线的管。 不连续的细长带通过缝合形成连续的卷绕。 线迹可以是通过延伸穿过管的重叠区域的通孔以互连带状导体的端部,或者可以由覆盖条状导体的端部的HDI导体产生,通孔形成与条状导体的端部的连接, 到HDI导体。
    • 39. 发明授权
    • Miniband transport quantum well detector
    • 微型运输量子阱探测器
    • US5965899A
    • 1999-10-12
    • US300097
    • 1994-09-01
    • John W. Little, Jr.
    • John W. Little, Jr.
    • H01L27/146H01L31/0352H01L31/101H01L29/15
    • B82Y20/00H01L27/146H01L31/0352H01L31/035236H01L31/101Y10S977/759
    • A semiconductor device for detecting radiation includes a plurality of quantum well layers, each of which has bound ground and excited states, interleaved with a plurality of superlattice barrier layers, each of which has a miniband of energy states. By selection of the thicknesses and compositions of the layers, the excited states of the quantum wells have energies that are approximately equal to energies of states in the minibands. Thus, the excited states and minibands form a band of energy states that is substantially continuous across the pluralities of layers. Carriers are excited from the quantum wells' ground states to the excited states by photon absorption and are swept into and through the minibands by an externally applied electric field. The carriers are collected as photocurrent. The excited states may be selectively positioned in the minibands to tailor the properties of the devices, which can have both n-type and p-type dopants. Devices that respond to more than one wavelength band are also disclosed.
    • 用于检测辐射的半导体器件包括多个量子阱层,每个量子阱层具有绑定的地面和激发态,与多个超晶格势垒层交错,每个超晶格势垒层具有能量状态的最小值。 通过选择层的厚度和组成,量子阱的激发态具有近似等于最小值中的状态能量的能量。 因此,激发态和迷你带形成在多个层上基本连续的能量状态带。 载体由量子阱的基态激发,通过光子吸收激发到激发态,并通过外部施加的电场扫入并通过微型物体。 作为光电流收集载体。 激发态可以选择性地定位在迷你型中以调整可以具有n型和p型掺杂剂的器件的性质。 还公开了响应于多于一个波长带的装置。
    • 40. 发明授权
    • Architecture for an integrated mobile and fixed telecommunications
system including a spacecraft
    • 包括航天器的综合移动和固定电信系统的架构
    • US5907541A
    • 1999-05-25
    • US957753
    • 1997-10-20
    • Daniel Wayne FairholmDennis Clifton Whitaker
    • Daniel Wayne FairholmDennis Clifton Whitaker
    • H04B7/185H04W84/14
    • H04W84/14H04B7/18563
    • A communication system (10) includes a plurality of fixed terrestrial gateway terminals (14) and fixed village terminals (18), and also includes a plurality of mobile user terminals (16). The system includes a first satellite (12m) which provides communication in a bent-pipe manner between user terminals (16) lying in spot-beams of the first satellite's antenna and gateway terminals (18) lying in a broad antenna beam. The system also includes a second satellite which provides communications in a bent-pipe manner between or among the gateways/village terminals. The village terminals differ from the gateways in that the village terminals do not include the subscriber of user home or visitor registers. The village terminal includes a wireless local communication system such as a WLL, for communicating with user terminals (16) lying within its range. The user terminals (16) are dual-mode. In a first operating mode, the user terminals (16) communicate with other users by way of the village terminal when within its range, and otherwise switch to a second mode, in which they communicate by way of the first satellite. The village terminal communicates with gateways by means of the second spacecraft.
    • 通信系统(10)包括多个固定地面网关终端(14)和固定村庄终端(18),并且还包括多个移动用户终端(16)。 该系统包括第一卫星(12m),其以位于第一卫星天线的点波束之间的用户终端(16)和位于宽天线波束中的网关终端(18)之间以弯管方式提供通信。 该系统还包括在网关/村庄终端之间或之间以弯管方式提供通信的第二卫星。 乡村终端与网关不同之处在于,村中心的终端不包括用户家庭或访客登记的用户。 村级终端包括诸如WLL的无线本地通信系统,用于与位于其范围内的用户终端(16)进行通信。 用户终端(16)是双模式的。 在第一操作模式中,用户终端(16)在其范围内通过乡村终端与其他用户进行通信,否则切换到通过第一卫星通信的第二模式。 村级终端通过第二艘航天器与网关通信。