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    • 7. 发明授权
    • Standoff distance variation compensator and equalizer
    • 间距距离变化补偿器和均衡器
    • US06462561B1
    • 2002-10-08
    • US09616971
    • 2000-07-14
    • Timothy A. BigelowNasser Nidal QaddoumiReza ZoughiLawrence M. Brown
    • Timothy A. BigelowNasser Nidal QaddoumiReza ZoughiLawrence M. Brown
    • G01R2732
    • G01N22/00
    • An inventively enhanced near-field sensor includes circuitry which removes variation in standoff distance (of the sensor from the inspected object) as a factor in the inspection system readings. An original output voltage which varies linearly according to standoff distance is, modified and added to a counterbalancing output voltage which equivalently but oppositely varies linearly according to standoff distance, resulting in a constant output voltage regardless of standoff distance. For calibration purposes, a third output voltage can also be summed along with the modified output voltage and the counterbalancing output voltage. Since the effect of surface variation is nullified, the practitioner can more truly assess the interior physical condition of the inspected object, knowing that the object's surface roughess is rendered irrelevant.
    • 一种发明增强的近场传感器包括作为检查系统读数的一个因素消除了距检测对象的传感器的距离距离变化的电路。 根据间隔距离线性变化的原始输出电压被修改并添加到平衡输出电压,其等效但相反地根据间隔距离线性地变化,导致恒定的输出电压,而不管间隔距离。 为了校准目的,第三输出电压也可以与修改的输出电压和平衡输出电压相加。 由于表面变化的影响无效,实践者可以更加真实地评估被检查对象的内部身体状况,因为知道对象的表面浮雕是无关紧要的。
    • 9. 发明授权
    • Dual function catalyst and isomerization therewith
    • 双功能催化剂及其异构化
    • US5082984A
    • 1992-01-21
    • US664243
    • 1991-03-04
    • Lawrence M. Brown, deceasedTracy J. Huang
    • Lawrence M. Brown, deceasedTracy J. Huang
    • B01J29/40C07C5/22C07C5/27C07C15/00
    • B01J29/40C07C5/2724
    • A dual function composite catalyst for isomerizing an isomerization feed containing an aromatic C.sub.8 mixture of ethyl benzene and xylene, comprises (a) a crystalline aluminosilicate zeolite having a low acid activity as measured by an alpha value of from 0.02 to 11, an average crystal size of not more than 0.4 microns for at least 50% by weight of the crystals, a silica to alumina ratio of at least about 12, a constraint index of about 1 to 12, a xylene sorption capacity greater than 1 gram per 100 grams of zeolite, and an ortho-xylene sorption time for 30 percent of said capacity less than 10 minutes, said sorption capacity and sorption time being measured at 120.degree. C. and a xylene pressure of 4.5.+-.0.8 mm of mercury, and (b) a supported metal of Group VIII of the Periodic Table having a high hydrogenation/dehydrogenation activity to provide the catalyst with a dehydrogenation activity of at least 10. The catalyst has an alpha value of 0.005 to 3.
    • 用于异构化异构化进料的双功能复合催化剂,其含有乙苯和二甲苯的芳族C 8混合物,包括(a)具有低酸活性的结晶硅铝酸盐沸石,其α值为0.02至11,平均晶体尺寸 对于至少50重量%的晶体,二氧化硅与氧化铝的比例至少约为12,约1到12的约束指数,每100克沸石的二甲苯吸附容量大于1克,不超过0.4微米 ,并且邻二甲苯吸附时间为所述容量的30%小于10分钟,所述吸附容量和吸附时间在120℃下测量,二甲苯压力为4.5 +/- 0.8mm汞柱,(b) 元素周期表第VIII族的负载金属具有高的氢化/脱氢活性,以使催化剂具有至少10的脱氢活性。该催化剂具有0.005至3的α值。