Abstract:
Systems, methods, and computer-readable media for determining long binary sequences having low autocorrelation functions using evolutionary processes are disclosed. Biphase sequences are found with low peak sidelobe values meeting a predetermined criterion, e.g., threshold low auto-correlation function, including application of semidefinite programming in connection with determining an initial population, and evolving the population with an evolutionary algorithm to bits of the biphase sequences including bit flipping. The found biphase sequences can be communicated to a variety of applications, including wireless communications technologies.
Abstract:
Spectrum sensing in wireless communications is provided to identify utilized and/or unutilized frequency bands reserved for primary users using a cyclostationary beamforming approach. An adaptive cross self-coherent restoral (ACS) algorithm can be utilized to extract signals of interest (SOI) at unique cycle frequencies related to primary and/or secondary users from an antenna array measurement. Based on the SOI, one or more users of the spectrum can be identified or the spectrum can be regarded as vacant; this can be based on lobe identification in the frequency spectrum of the SOI, in one example. This mechanism is less complex than traditional cyclic spectrum analysis methods. The cyclostationary beamforming based approach is more effective than the energy detection method. Also, the need for quiet periods in spectrum sensing is eliminated when using this mechanism such that signals can be transmitted simultaneously with receiving signals over the antenna array.
Abstract:
Methods for preparing a composition containing amorphous iron oxide hydroxide. Methods for regeneration of the amorphous iron oxide hydroxide after it has been used as desulfurizer. Regenerable desulfurizer with high sulfur capacity containing amorphous iron oxide hydroxide, not less than 88% w/w, and organic binder not less than 7% w/w. The organic binder is sodium carboxymethylcellulose, sesbania powder, cellulose powder, or a mixture thereof. A method for preparing the desulfurizer. A method for regenerating the waste agent produced after the desulfurizer and the composition containing the desulfurizer are used as desulfurizer. This method allows the desulfurizer and the composition containing the desulfurizer to be regenerated and reused avoiding the need for landfill disposal and environmental pollution.
Abstract:
An electronic device that facilitate locating connection port thereof is described. The main portion has a lateral surface. The connection port is disposed on the lateral surface. The identification symbol is disposed on the lateral surface. The light source is disposed within the main portion and operable to emit light through the identification symbol so as to project a pattern of the identification symbol on a surface, which supports the main portion. The connection port on a lateral surface of the electronic device is located according to where the pattern of the identification symbol is located.
Abstract:
An electronic device that facilitate locating connection port thereof is described. The main portion has a lateral surface. The connection port is disposed on the lateral surface. The identification symbol is disposed on the lateral surface. The light source is disposed within the main portion and operable to emit light through the identification symbol so as to project a pattern of the identification symbol on a surface, which supports the main portion. The connection port on a lateral surface of the electronic device is located according to where the pattern of the identification symbol is located.
Abstract:
The present invention discloses a composition for a desulfurizer with a high sulfur capacity and a process for making the same. The composition comprises the active components of three kinds of iron oxides and is used in the desulfurizer to remove hydrogen sulfide from the gaseous and liquid state feed stocks. The above-mentioned composition comprises cubic ferroferric oxide in the form of crystalline phase (Fe3O4), amorphous ferric oxide (Fe2O3) and amorphous ferric oxide monohydrate (Fe2O3.H2O). The composition has a sulfur capacity of at least 40%. The process for preparing the composition comprises the following steps: (1) mixing a solid ferrous compound with a solid hydroxide at a molar ratio of iron to hydroxyl being in the range from 1:2 to 1:3; (2) kneading the mixture feeds obtained in step (1) and making them react completely; (3) drying the products obtained in step (2) in the air; (4) washing and filtering the feeds obtained in the step (3); (5) naturally drying or baking the solids obtained in step (4) to form a composition for a desulfurizer with a high sulfur capacity. The process of the present invention is simple and easy to operate, consumes less energy and produces the products with a stable quality.
Abstract translation:本发明公开了一种硫含量高的脱硫剂组合物及其制造方法。 该组合物包含三种氧化铁的活性组分,并用于脱硫剂中以从气态和液态原料中除去硫化氢。 上述组合物包含结晶相(Fe 3 O 4 O 4)形式的立方氧化铁,无定形氧化铁(Fe 2 O 3 O 3)和无定形氧化铁一水合物(Fe 2 O 3 O 3 H 2 O)。 该组合物的硫容量至少为40%。 制备组合物的方法包括以下步骤:(1)将固体亚铁化合物与固体氢氧化物以铁与羟基的摩尔比混合在1:2至1:3的范围内; (2)捏合步骤(1)中获得的混合物进料并使其完全反应; (3)在空气中干燥步骤(2)中获得的产物; (4)洗涤和过滤在步骤(3)中获得的饲料; (5)自然干燥或烘烤在步骤(4)中获得的固体,以形成具有高硫容量的脱硫剂组合物。 本发明的方法简单易操作,消耗更少的能量并产生质量稳定的产品。
Abstract:
The present invention relates to a tray used in an optical disc drive. At least two aligning means arranged in the tray and formed integrally with the tray for providing an accordance reference of forming an aligning line at a front side and a back side of the tray, respectively. The aligning line is formed through the aligning means used to measure the precise size of each component arranged at the front side and back side of the tray, respectively.
Abstract:
Control apparatus used in connection with commodes automatically moves a trip lever for flushing the commode and includes a member adapted to be connected to the trip lever for moving between an initial position and a flushing position to cause the trip lever to raise a drain valve to its open position. A spring moves the member to its flushing position, and a person-operated device causes energy to be stored in the spring and releases subsequently the energy from the spring to move the member toward its flushing position. A latching device connected to the member connects releasably the member and the trip member for moving it and the valve against the force of water pressure acting on the valve until the water pressure equals the force applied by the spring after sufficient water discharge. As a result, the spring commences again to move the member after the sufficient water discharge has taken place to release the latching device so that the member becomes free of the trip lever and the flushing mechanism can complete its normal flushing operation.