摘要:
Irrigation systems, moisture sensors and related methods having a sensor imbedded in the ground to sense moisture and help control watering. The sensor is responsive to capacitance changes from ground moisture variations. The sensor uses spaced insulated electrodes which are mounted within a granular filled chamber within a water-permeable shell. The sensor is mounted as part of a ground unit that also includes a high frequency driver that excites the sensor. The ground unit further has a detector circuit which produces a moisture indicating signal based on the capacitance which varies with ground moisture. Also disclosed are controllers that electrically isolate the ground units so that reliable moisture signals can be obtained and used to control irrigation. The controllers can be configured to provide multiple zone operation using a shared controller having shared or independent moisture adjusters.
摘要:
A method of forming a thermoplastic vulcanizate by first providing a melt-blender having a die through which melt-blended thermoplastic vulcanizate passes to form a shaped article; wherein the die comprises a flow design having at least one flow branch having a taper angle and a flow reservoir at the end of each flow branch; and wherein the taper angle of the flow design ranges from 5 to 20 degrees; followed by melt-blending a thermoplastic and an elastomer with an organic peroxide curative in the melt-blender to form a thermoplastic vulcanizate; and finally, passing the melt-blended thermoplastic vulcanizate through the flow design to form the shaped article.
摘要:
This invention provides a method for determining leakage current in a CMOS circuit having several devices. It includes the steps of reading a netlist which describes the circuit and includes information on both these devices in the circuit and how these devices are interconnected. Next, an input signal state data file is generated which provides all of the possible input states for the circuit. A determination is made of which devices in the circuit are in an OFF state for each of the input signal states provided. Then the leakage current for each of these devices in the OFF state is computed for each of the input signal states.
摘要:
This invention provides a method for determining leakage current in a CMOS circuit having several devices. It includes the steps of reading a netlist which describes the circuit and includes information on both these devices in the circuit and how these devices are interconnected. Next, an input signal state data file is generated which provides all of the possible input states for the circuit. A determination is made of which devices in the circuit are in an OFF state for each of the input signal states provided. Then the leakage current for each of these devices in the OFF state is computed for each of the input signal states.
摘要:
A dry powder inhaler consisting of first chamber having an orifice for holding a dry powder and a gas, and a second chamber for receiving a deaggregated form of the dry powder and for communicating the deaggregated dry powder to a user. A synthetic jet drives the dry powder from the first chamber to the second chamber.
摘要:
Uniform portions of fine powders are deposited on a substrate by electrostatic attraction in which the charge of the electric field and polarity of the charged particles are varied repeatedly to form a buildup of powder on the carrier surface.
摘要:
A retractable arm assembly for use in positioning a milker arm near the teats of a cow is disclosed. The retractable arm assembly allows a milker claw to be stored above a milking platform in a clean, safe position, and then automatically extended to the milking position and maintained in that position until the milker claw has been removed from the teats of the cow. The retractable arm assembly includes a movable milker arm having an interior chamber for receiving a chain to which the milker claw attaches. A lever arm connected to the milker arm faciliates movement of the milker arm in a downward and outward path around and behind the cow's rear leg. Both the chain and the milker arm can be selectively extended and retracted.
摘要:
Composite epitaxial materials that comprise semimetallic ErAs nanoparticles or nanoislands epitaxially embedded in a semiconducting In0.53Ga0.47As matrix both as superlattices and randomly distributed throughout the matrix are disclosed. The presence of these particles increases the free electron concentration in the material while providing scattering centers for phonons. Electron concentration, mobility, and Seebeck coefficient of these materials are discussed and their potential for use in thermoelectric power generators is postulated. These composite materials in accordance with the present invention have high electrical conductivity, low thermal conductivity, and a high Seebeck coefficient. The ErAs nanoislands provides additional scattering mechanism for the mid to long wavelength phonon—the combination reduces the thermal conductivity below the alloy limit.
摘要翻译:公开了包含作为超晶格并随机分布在整个矩阵中的半导体In 0.53 Ga 0.47 As As的半金属ErAs纳米颗粒或纳米晶体的复合外延材料。 这些颗粒的存在增加了材料中的自由电子浓度,同时为声子提供散射中心。 讨论了这些材料的电子浓度,迁移率和塞贝克系数,并假设它们在热电发电机中的使用潜力。 根据本发明的这些复合材料具有高导电性,低热导率和高塞贝克系数。 ErAs nanoislands为中长波长声子提供了额外的散射机制,该组合降低了导热系数低于合金极限。
摘要:
A method for equalizing optical signal power in a group of optical signals transmitted through an optical switch in an optical transmission system. In one embodiment a group of optical signals is input into an optical switch having at least one movable mirror array with a plurality of reflectors formed thereon, the optical beam being directed onto a selected at least one reflector and wherein attenuating the optical beam is accomplished by controllably detuning at least one of the selected at least one reflector to attenuate the optical beam.
摘要:
An apparatus for simultaneous OTDM demultiplexing, electrical clock recovery and optical clock generation, and optical clock recovery using a traveling-wave electroabsorption modulator. The apparatus includes a TW-EAM and a PLL coupled thereto. The TW-EAM includes a first, a second, a third, and a fourth. The first port is used for an optical input and the third port is used for optical output. The second port is coupled to an input, and the fourth port is coupled to an output, of the PLL. When the first port receives optical input, the second port produces a photocurrent to be applied to the PLL, and the fourth port receives a recovered clock produced by the PLL, and the third port produces demultiplexed data and an optical clock. Using the same configuration, the apparatus produces a recovered optical clock signal.