Weijian

Weijian Chen, Shenzhen CN

Patent application number	Description	Published
20130230317	SIGNAL DETECTION METHOD AND OPTICAL SIGNAL RECEIVING SYSTEM - The present invention provides a signal detection method, including: receiving, by a frequency mixer, wavelength division multiplexing signals and a local oscillator signal, where a wavelength of the local oscillator signal and a wavelength of a target signal in the wavelength division multiplexing signals are the same; a frequency mixer performs interference on the wavelength division multiplexing signals through the local oscillator signal to obtain a coherent signal formed by the local oscillator signal and the target signal; sending the coherent signal to a transimpedance amplifier for amplification to obtain a voltage signal; and obtaining the power of the target signal according to a power amplitude of the voltage signal.	09-05-2013
20140119723	OPTICAL MODULE AND DETECTION CIRCUIT THEREOF - The present invention discloses an optical module and a detection circuit thereof. The detection circuit includes: a sampling module, including a first potentiometer configured to convert a sampling current into a sampling voltage; an amplifying module, coupled to an output end of the sampling module and configured to amplify the sampling voltage; and an analog-to-digital conversion module, coupled to an output end of the amplifying module and configured to convert the amplified sampling voltage into a digital signal for detection. By arranging a potentiometer in a sampling module of a detection circuit, a resistance value of the sampling module can be adjusted, thereby adapting to responsivities of different modulators, increasing the locking speed of a modulator, preventing horizontal shifts of a locking point and a false locking point, and reducing the occupied PCB area.	05-01-2014
20150155948	RECEIVING APPARATUS AND METHOD, SENDING APPARATUS AND METHOD, FRONT-END CIRCUIT, MODULATOR, AND TRANSCEIVING SYSTEM - A receiving apparatus and method, a sending apparatus and method, a front-end circuit, a modulator, and a transceiving system are provided. The sending apparatus includes: a double-sideband OFDM modulator, configured to perform double-sideband OFDM modulation on a bit sequence of service data to obtain a double-sideband OFDM analog electrical signal, where the double-sideband OFDM analog electrical signal carries the service data on both positive and negative sidebands, and an IQMZ, configured to perform optical carrier modulation on the double-sideband OFDM analog electrical signal to obtain a double-sideband OFDM optical signal, where the double-sideband OFDM optical signal carries the service data on both positive and negative sidebands. In comparison with a traditional manner in which service data is only carried on a positive sideband, bandwidth utilization in the present invention doubles.	06-04-2015

Weijian Lan, Wuxi CN

Patent application number	Description	Published
20150349557	Movable Device and Method of Charging the Same - An apparatus and method for charging movable devices like carts or trolleys. Each movable device includes a charging unit and a charging connector coupled to the charging unit, including a male plug at one end, a female socket at the other end, and two electrodes interconnected. When the devices are in a queue, the male plug of the connector of a device in the rear is connected to the female socket of the same in the front so that a plurality of movable devices are connected to each other in tandem and charged simultaneously. The method includes connecting the plurality of devices in tandem with the respective connectors so that the devices can be charged simultaneously. A plurality of movable devices can be charged simultaneously and the charging process can be simplified, thereby improving the utilization and safety of the movable devices and reducing the cost of maintenance.	12-03-2015
20150349564	Electrical Connector And Movable Device Using The Same - The invention discloses an electric connector, comprises an insulated housing, a male plug at one end of the housing and a female socket on the opposite end of the housing. The male plug and female socket respectively have an electrode and an electrode slice which is electrically connected with a pair of the male plug and female socket inside the housing. The female socket has an opening adaptive to accommodate the male plug the and enable a connection between the electrode of the male plug and that of the female socket. The invention also provides a movable device using the electric connector. According to the invention, a plurality of movable devices with a charging unit can be charged simultaneously and the charging process can be simplified, thereby improving the utilization and safety of the movable devices and lowering the cost of maintenance.	12-03-2015

Weijian Li, Shenzhen CN

Patent application number	Description	Published
20140114752	METHOD AND SYSTEM FOR DYNAMICALLY SCREENING ADVERTISEMENT - Method and system for dynamically screening advertisement on a media are adapted to be used in the field of e-commerce. Information of at least one advertised object and/or at least one advertisement rule of the media are monitored with a monitoring unit to determine if any change occurs. If the occurrence of a change is determined, for example by the monitoring unit, information of the advertised object(s) is examined by a screening unit.	04-24-2014

Weijian Liu, Shenzhen CN

Patent application number	Description	Published
20150253831	METHOD, APPARATUS AND SYSTEM FOR ADJUSTING VOLTAGE OF SUPERCAPACITOR - A method for adjusting a voltage of a supercapacitor is disclosed, the method, which is used to retard aging of the supercapacitor and extend a service life of the supercapacitor, includes: acquiring information that carries a system service volume; configuring a size of an available capacity value of the Cache according to the information; and adjusting a working voltage of the supercapacitor according to the configured size of the available capacity value of the Cache.	09-10-2015

Weijian Wang, Shenzhen CN

Patent application number	Description	Published
20150055777	METHOD OF ESTABLISHING PUBLIC KEY CRYPTOGRAPHIC PROTOCOLS AGAINST QUANTUM COMPUTATIONAL ATTACK - The present invention relates to information security and discloses a method of establishing public key cryptographic protocols against the quantum computational attack. The method includes the following steps: definition of an infinite non-abelian group G; choosing two private keys in G by two entities; a second entity computing y, and sending y to a first entity; the first entity computing x and z, and sending (x, z) to the second entity; the second entity computing w and v, and sending (w, v) to the first entity; the first entity computing u, and sending u to the second entity; and the first entity computing K	02-26-2015

Weijian Xu, Beijing CN

Patent application number	Description	Published
20130159920	SCENARIO-ADAPTIVE INPUT METHOD EDITOR - An input method editor (IME) described herein couples scenarios of the input of the user with specific network services to offer more relevant and richer candidates for higher input productivity. Data relating to a computer application in which the input candidates are to be input and/or context relating to a user-submitted query is collected and analyzed to determine a scenario. The input candidates may include text candidates and rich candidates. The IME may select a scenario-tuned and type specific engine to identify the text candidates and/or rich candidates. The scenario-tuned text candidate engines leverage scenario-tuned language models and lexicons, and the scenario-tuned rich candidate engines leverage scenario-relevant web services, such as image, mapping, and video search, when available and appropriate.	06-20-2013

Weijian Yang, Berkeley, CA US

Patent application number	Description	Published
20120076161	LONG DISTANCE TRANSMISSION USING MULTI-MODE VCSEL UNDER INJECTION LOCKING - Adjustable chirp is achieved in injection-locked, 10-Gb/s directly modulated, multimode 1.55-μm VCSELs for the first time, leading to 90× increase in standard single-mode fiber transmission distance to 90 km.	03-29-2012
20150286006	HIGH EFFICIENCY VERTICAL OPTICAL COUPLER USING SUB-WAVELENGTH HIGH CONTRAST GRATING - A vertical optical coupler which redirects light transmission in response to the interaction between a sub-wavelength high contrast grating (HCG) having a plurality of spaced apart segments of grating material which is optically coupled to a waveguide. For a selected set of material, grating geometry, gaps and spacing, the light directed at a normal incidence into the optical coupler is angularly displaced in traveling in the optical waveguide, while light directed along the optical waveguide is angularly displaced in being output at normal incidence from the optical coupler. The coupler is integrated into a number of device embodiments, including: a coupler between angularly displaced waveguides, lasers, light emitting diodes (LEDs) and solar cells.	10-08-2015

Weijian Yang, Berekely, CA US

Patent application number	Description	Published
20140353530	POLARIZATION INDEPENDENT DUAL USAGE HCG VCSEL-DETECTOR WITH HIGH CONTRAST GRATING AND TWO DIMENSIONAL PERIOD STRUCTURE - A dual usage HCG VCSEL detector is provided with a high contrast grating (HCG) reflector first reflector that has a two dimensional periodic structure. The two dimensional structure is a periodic structure that is a symmetric structure with periodic repeating. The symmetrical structure provides that polarization modes of light are undistinguishable. A second reflector is in an opposing relationship to the first reflector. A tunable optical cavity is between the first and second reflectors. An active region is positioned in the cavity between the first and second reflectors. The photodetector is polarization independent. An MQW light absorber is included converts light to electrons. A dual usage HCG VCSEL-detector includes a high contrast grating (HCG) reflector first reflector, and a second reflector in an opposing relationship to the first reflector. A tunable optical cavity is between the first and second reflectors. An active region is positioned in the cavity between the first and second reflectors. The dual usage HCG VCSEL-detector that operates as a dual usage HCG VCSEL and as a tunable photodetector.	12-04-2014
20140353583	POLARIZATION INDEPENDENT PHOTODETECTOR WITH HIGH CONTRAST GRATING AND TWO DIMENSIONAL PERIOD STRUCTURE - A photodetector is provided with a high contrast grating (HCG) reflector first reflector that has a two dimensional periodic structure. The two dimensional structure is a periodic structure that is a symmetric structure with periodic repeating. The symmetrical structure provides that polarization modes of light are undistinguishable. A second reflector is in an opposing relationship to the first reflector. A tunable optical cavity is between the first and second reflectors. An active region is positioned in the cavity between the first and second reflectors. The photodetector is polarization independent. An MQW light absorber is included converts light to electrons.	12-04-2014

Weijian Yu, Guangzhou CN

Patent application number	Description	Published
20140305069	APPARATUS AND METHOD FOR REVERSE RECTIFICATION - The present invention disclosed an apparatus for reverse rectification, relating to the field of civil engineering technology. The apparatus for reverse rectification comprises two sets of steel plate hooks, which are reversely arranged and respectively fixed on the building and the skewed large-scale structure that needs to be rectified, and a jack which is horizontally placed on the steel plate hooks. The steel plate hooks, which are driven by the jack, push the skewed structure towards the existed building, whereby the skewed structure and the existed building can be spliced correctly. This present invention has more advantages, e.g. simple structure and convenient operability, which can improve the construction efficiency and reduce the construction costs. Therefore it can be widely used in the field of civil engineering technology. Further, the present invention also discloses a method for reverse rectification by using the apparatus.	10-16-2014