Abstract: A passenger boarding bridge leveling mechanism mounted on a passenger boarding bridge includes a four-bar linkage mechanism and a preload apparatus. The four-bar linkage mechanism includes a mounting base which can be fixedly mounted on the passenger boarding bridge. One of the other three bars of the four-bar linkage mechanism extends outwards, and a leveling wheel and a first detection switch are mounted on the end of the bar. The first detection switch is used for detecting the vertical displacement of the leveling wheel on an aircraft fuselage. The preload apparatus has a preload force. One end of the preload apparatus is connected to the four-bar linkage mechanism, and the other end is connected to the mounting base. The preload apparatus has a preload force to make the leveling wheel maintain a tendency of extending outwards. The passenger boarding bridge leveling mechanism has high test precision and can work reliably.

Abstract: The present invention relates to a method for manufacturing a bamboo framework body to solve the technical problem of low production efficiency of the existing bamboo framework body. The present invention has the first technical solution of bending a bamboo board into a U-shaped board, cutting the U-shaped board into several U-shaped units, and finally arranging a connecting rod at or close to an opening of the U-shaped unit to make into a bamboo framework body. The present invention has the second technical solution of gluing and stacking plural single bamboo boards and laminating them into a U-shaped board directly; cutting the U-shaped board into several U-shaped units; and finally arranging a connecting rod at or close to an opening of the U-shaped unit to make into a bamboo framework body.

Abstract: The present invention relates to a method for shaping a frame structure using a multilayer board to solve the technical problem of low production efficiency of the existing bamboo frame structure. The present invention has the first solution of bending a multilayer board into a profiled board using the board bending technology; cutting the profiled board into several framing units; and finally connecting end portions of one, two or plural framing units one another, thereby forming a frame structure. The present invention has the second solution of gluing and stacking a plurality of single boards and laminating them into a profiled board; cutting the profiled board into several framing units; and finally connecting end portions of one, two or plural framing units one another, thereby forming a frame structure.

Abstract: A hollow bamboo strip includes mao bamboo sheets formed by splitting bamboo; the two sides of a mao bamboo sheet are cut with matching surfaces, thereby making a finished bamboo sheet with a trapezoidal cross section, the matching surfaces of a plurality of finished bamboo sheets are successively spliced or finger jointed into a hollow bamboo strip with a hollow structure. A hollow bamboo board is spliced by fitting several hollow bamboo strips at side surfaces. A method for manufacturing a hollow bamboo board includes: splitting the bamboo into several mao bamboo sheets in its peripheral direction; cutting a mao bamboo sheet into a finished bamboo sheet with a trapezoidal cross section; carbonizing the finished bamboo sheet; forming the finished bamboo sheets subjected to carbonization into a hollow bamboo strip; fitting corresponding side surfaces of several hollow bamboo strips to be spliced into a hollow bamboo board.

Abstract: A production process of a bamboo bowl includes: cutting out arc-shaped bamboo strips on a bamboo board; splicing the bamboo strips into a bamboo ring; finally gluing several bamboo rings with gradually larger diameters on the bottom of the bamboo bowl successively to form a bamboo bowl billet, and making into a bamboo bowl after subsequent processings. The bamboo bowl made by the above production process includes a bamboo bowl bottom and bamboo rings superimposed on the bamboo bowl bottom; the bamboo ring consists of at least two arc-shaped bamboo strips, the diameters of the bamboo rings are gradually increased from the bottom up; the arc-shaped bamboo strips are fixed through adhesive, and the bamboo rings are also fixed through adhesive.

Abstract: Circuitry for converting a multi-level signal into at least one binary signal, having a period T and comprising n signal levels, includes comparing and splitting circuitry configured for comparing a value of the multi-level signal with (n?1) different reference values, and having N sets of (n?1) output terminals for outputting N sets of (n?1) output signals indicating whether the value of the multi-level signal is below or above the (n?1) reference values. The circuitry also includes N sets of (n?1) sample-and-hold circuits having an input and an output and being configured for operating at a clock period N*T, wherein each output terminal is connected to the input of a sample-and-hold circuit. Further, the circuitry includes logical circuitry connected to the outputs of the N sets of (n?1) sample-and-hold circuits for generating at least one binary signal having a period N*T.

Abstract: Circuitry for converting a multi-level signal into at least one binary signal, having a period T and comprising n signal levels, includes comparing and splitting circuitry configured for comparing a value of the multi-level signal with (n?1) different reference values, and having N sets of (n?1) output terminals for outputting N sets of (n?1) output signals indicating whether the value of the multi-level signal is below or above the (n?1) reference values. The circuitry also includes N sets of (n?1) sample-and-hold circuits having an input and an output and being configured for operating at a clock period N*T, wherein each output terminal is connected to the input of a sample-and-hold circuit. Further, the circuitry includes logical circuitry connected to the outputs of the N sets of (n?1) sample-and-hold circuits for generating at least one binary signal having a period N*T.

Abstract: A clock and data recovery (CDR) circuit, a method of recovering a clock and data from a received raw data stream and a BI-PON optical network transceiver (ONT) receiver front-end incorporating the CDR circuit. In one embodiment, the CDR circuit includes: (1) a line rate CDR circuit having a voltage controlled oscillator, the line rate CDR circuit configured to recover a raw data stream at a receiving line rate, (2) a fixed-rate down-sampler coupled to the line rate CDR circuit and configured to down-sample the raw data stream based on a fixed-rate and (3) a variable-rate down-sampler coupled to the fixed-rate down-sampler and configured further to down-sample the raw data sample based on a variable-rate.

Abstract: An amplifier circuit is disclosed. In one embodiment, the amplifier circuit includes an input configured to receive an input signal. The amplifier circuit further includes an amplifier connected to the input that is configured to receive the input signal and generate a modulated input signal based on the input signal and one of a first amplification level and a second amplification level. The amplifier comprises a first transistor configured to receive the input signal and a second transistor connected in cascode with the first transistor. The amplifier circuit further includes a switching component configured to switch the amplifier between the first amplification level and the second amplification level. The amplifier circuit still further includes an output connected to the amplifier and configured to output the modulated input signal.

Abstract: A clock and data recovery (CDR) circuit, a method of recovering a clock and data from a received raw data stream and a BI-PON optical network transceiver (ONT) receiver front-end incorporating the CDR circuit. In one embodiment, the CDR circuit includes: (1) a line rate CDR circuit having a voltage controlled oscillator, the line rate CDR circuit configured to recover a raw data stream at a receiving line rate, (2) a fixed-rate down-sampler coupled to the line rate CDR circuit and configured to down-sample the raw data stream based on a fixed-rate and (3) a variable-rate down-sampler coupled to the fixed-rate down-sampler and configured further to down-sample the raw data sample based on a variable-rate.

Abstract: An amplifier circuit is disclosed. In one embodiment, the amplifier circuit includes an input configured to receive an input signal. The amplifier circuit further includes an amplifier connected to the input that is configured to receive the input signal and generate a modulated input signal based on the input signal and one of a first amplification level and a second amplification level. The amplifier comprises a first transistor configured to receive the input signal and a second transistor connected in cascode with the first transistor. The amplifier circuit further includes a switching component configured to switch the amplifier between the first amplification level and the second amplification level. The amplifier circuit still further includes an output connected to the amplifier and configured to output the modulated input signal.

Abstract: The present invention discloses an analogue-to-digital converter comprising at least two voltage comparator devices. Each of the voltage comparator devices comprises a differential structure of transistors and is arranged for being fed with a same input signal and for generating an own internal voltage reference by means of an imbalance in the differential structure, said two internal voltage references being different. Each voltage comparator is arranged for generating an output signal indicative of a bit position of a digital approximation of the input signal.

Abstract: The present invention relates to an instrument for treating amblyopia using automatic frequency conversion laser, comprises a laser generator, a circular lightproof system installed on the output light path and a control circuit, also comprises an angular rotation expander for adjusting height and light path output angle. The angular rotation expander comprises a primary drawtube having a primary lens, set outside of a secondary drawtube having a secondary lens. The primary drawtube is set outside of the secondary lens and can reciprocate along it. A retainer is equipped on the upper position of the secondary drawtube. There is an opening on one side of the primary drawtube for leaving the light out, a reflector is set inside of the primary lens facing the opening. Light outputted by the laser generator is transmitted directly to the secondary lens, and then to the primary lens, and finally is sent out from the opening after reflected by the reflector.

Abstract: Determination of a target category associated with a business listings query is provided. A query categorization system initially generates a mapping of internal categories of the query categorization system to target categories of a search engine service. The query categorization system receives a business listings query and identifies business listings that match the query. The query categorization system identifies an internal category associated with each matching business listing. The query categorization system then identifies from the mapping the target categories that correspond to the identified internal categories. The query categorization system selects one of the identified target categories as the category to be associated with the query.