1656 results about "Transmission function" patented technology

A video system with a bi-directional transmission function is provided. The video system includes an video transmitter, a transmission interface and a video receiver. The video transmitter is coupled to the video receiver via the transmission interface (coaxial cable). The video transmitter is used for inserting a first control signal into the video signal according a synchronous signal of the video signal. The video transmitter is used for outputting the video signal with the first control signal to the video receiver via the transmission interface. The video receiver receives the video signal with the first control signal, and gets the first control signal from the video signal according to the synchronous signal of the video signal. In addition, the video receiver can insert a second control signal into the video signal and feedback the second control signal to the video transmitter via the transmission interface.

An antenna system comprises: multiple antenna elements; and multiple beam forming networks configured to produce radiation patterns for both receiving and transmission functions configured to be optimized by re-positioning said antenna elements, wherein said beam forming networks comprise a receiving beam forming network configured to combine multiple first inputs from said antenna elements into at least a first output, and a transmission beam forming network configured to divide a second input into multiple second outputs to said antenna elements.

A method of controlling the point spread function of an image projected with said image being diffused by a filter; said point spread function is a result of the application of spatial filter(s) on said image; with said control of the point spread function effected by varying the distance between such image and said spatial filter(s) and varying the bidirectional scattering transmission function of the spatial filter(s). Said spatial filter may be a holographic diffuser, which by method of manufacture has a ell defined bi-directional scattering transmission spread function. Control of said spread function is particularly useful to maintain image quality while abating moiré interference in situations where two periodic patterns are layered causing moiré interference.

A surface light source device according to the invention includes a housing having an opening portion on at least one face, an LED light source held by one face of the housing opposing the opening portion, and a light guiding plate arranged at a position so as to cover the opening portion and the LED light source, wherein the light guiding plate includes a recess provided at a position corresponding to the LED light source for storing a part of the LED light source, and light quantity adjusting means provided at a bottom part of the recess for adjusting light from the LED light source, and the light quantity adjusting means includes a reflection sheet having a reflection function and a transmission function in which a total light transmittance t satisfies t≧πr2 cos θ / {(1−cos θ)(S−πr2)}, supposing that an average radius is defined as r, a distance from the LED light source is defined as H, a light-emitting area of the LED light source is defined as S, and a total light quantity is defined as L.

A method and system is provided for computing lithographic images that may take into account non-scalar effects such as lens birefringence, resist stack effects, tailored source polarizations, and blur effects of the mask and the resist. A generalized bilinear kernel is formed, which is independent of the mask transmission function, and which may then be treated using a decomposition to allow rapid computation of an image that includes such non-scalar effects. Weighted pre-images may be formed from a coherent sum of pre-computed convolutions of the dominant eigenfunctions of the generalized bilinear kernel with the appropriate mask polygon sectors. The image at a point may be formed from the incoherent sum of the weighted pre-images over all of the dominant eigenfunctions of the generalized bilinear kernel. The resulting image can then be used to perform model-based optical proximity correction (MBOPC).

A vehicle-to-vehicle communication device installed on a subject vehicle includes a detection function, a transmission function, a report function and a signal-processing function to display position information of surrounding vehicles as well as the subject vehicle. In a process of displaying the position information of the vehicles, the device communicates with the devices installed on other vehicles within a reach of the communication function to reflect the position information of the surrounding vehicles including vehicles not equipped with the device.

A plug socket securing device, particularly one for use with an equipment provided with a plug socket having a slot formed by a resilient tab on the plug socket and features electrical or signal transmission function, comprising, a closure to be inserted into the plug socket for covering the plug socket; at least one fastener connected to the closure and being movable, in relation to the closure, between a first position, allowing the closure to attach and detach from the slot of the socket plug and a second position preventing the closure inserted in the plug socket from detaching from the plug socket; and a lock mechanism, assembled to the closure for actuating the fastener, the lock mechanism being switchable between an unlocked state and a locked state, where in the unlocked state, the lock mechanism forces the fastener to be retrained to the second position so as to prevent the plug socket from connecting to other articles. Based on such disclosures, this invention may further provide a connecting element, such as a cable, on the closure or the lock mechanism, wherein the connecting element affixes the equipment having the plug socket to a fixture, such as a table, thereby preventing theft of the equipment. Under the state where the equipment is affixed to the fixture, the plug socket may further provide an interface connected to the plug socket where the interface may be connected to other objects, such as a transmission line, thereby allowing indirect connection with the plug socket.

A portable device for the live scanning of fingerprint, facial and crime scene images and the wireless transmission of said images to a central host system for identity verification. The portable device has the ability to allow the user to operate the device with a single hand. It can scan and record live fingerprint slap or roll images (via optical, solid state, or video sensors). It also includes a baffle that assists with the mechanical alignment of the fingerprints on the fingerprint sensor receiving surface and prevents bright light sources from interfering with fingerprint scans. The portable device also can scan, display, and record latent fingerprint images. It also has other data receiving and transmission functions, such as displaying and recording facial and incident scene images in conditions ranging from well lit to total darkness, recording and playing back incident scene audio information for incident description and contacting voice recordings for identification. The portable apparatus can also scan, record, and interpret magnetic stripe, smart card, or bar code information from standard and non-standard cards. It also obtains, displays, and records geographical position for incident description, mapping, and directional instruction to the user. It further provides an emergency transmission for assistance and provides a short-range wireless link to a mobile unit or a direct wireless link to the central site. It also provides for entry by the user of text data for demographics or operator use through either keyboard or voice activation.

A hyper-spectral imaging filter has serial stages along an optical signal path in a Solc filter configuration. Angularly distributed retarder elements of equal birefringence are stacked in each stage, with a polarizer between stages. The retarders can include tunable (such as abutted liquid crystals tuned in unison), fixed and / or combined tunable and fixed birefringences. Although the retardations are equal within each stage, distinctly different retardations are used for two or more different stages. This causes some stages to pass narrow bandpass peaks and other stages to have widely spaced bandpass peaks. The transmission functions of the serial stages are superimposed with selected preferably-tunable peaks coinciding. The resulting conjugate filter has a high finesse ratio, and good out of band rejection.

A test and analysis system of digital machine process-dynamics character comprises hardware prepared as arranging acceleration transducer at tail end of cutter, connecting hammer and said transducer to electric charge amplifier being connected to data collector and carrying out data transmission with computer by said collector; and software formed by man-machine interactive boundary and module of data collection, data play-back, hammering test, transmission function analysis, parameter identification, noise test and analysis.

A novel phase-coded aperture, associated imaging system, and design method is disclosed. The optical imaging system includes a coded-aperture followed optically by a detector array and includes an image processor. A diffraction pattern in the form of a band-limited uniformly redundant array is formed on the detector array when focusable radiation from a point source in object space is modulation by the transmission function of the coded-aperture. Since diffraction effects cannot be ignored in the optical regime, an iterative phase retrieval method is used to calculate the phase-coded aperture transmission function. Correlation type processing can be applied for the image recovery.

The invention provides an adaptively adjusted laser projection module. The module comprises a light source, a specific optical element, a pattern generator and a light beam detector. The specific optical element comprises at least one light dividing face, wherein each light dividing face is used for reflecting and transmitting at least parts of light beams emitted by the light source. The pattern generator receives light beams parts of which are reflected or transmitted through the light dividing face, and externally emitting structure light patterns. The light beam detector is used for receiving the light beams parts of which are reflected or transmitted through the light dividing face, and detecting the intensity of the light beams. The invention also provides a depth camera. The depth camera comprises the adaptively adjusted laser projection module and is used for projecting structuralized light beam images towards a target space. According to the invention, by use of the specific optical element having the reflection and transmission functions, the laser projection module has quite small size; and by combining an optical detector, the light source can be detected anytime and anywhere, so laser intensity can be further controlled and damage to human is avoided.

An updating system able to easily and cheaply update music information in a terminal having a memory function unit storing music information of track data and music database information. A broadcasting apparatus 20 is configured by a broadcasting side memory function unit 21 for storing music information including track data and music database information and a transmission function unit 23 for broadcasting the music information on a broadcast channel, and a terminal 30 is configured by a reception function unit 31 for receiving the broadcast wave thereof, an extraction function unit 32 for extracting the music information from the received broadcast wave, and an update function unit 33 for updating the information in the reception side memory function unit 34 with the extracted music information.

The invention provides a modularized H-bridge cascade multilevel mutual-balance power electronic transformer. Power electronic devices are formed on the basis of IGBTs, the power electronic transformer can achieve four-quadrant controlled operation through an effective control strategy, two-way power flow control can be performed, a H-bridge cascade multilevel modularized structure is adopted for a main circuit, large-scale modularized production is facilitated, actual high-voltage class application can be performed, the harmonic content of output voltage is lower, the switching frequency of the power electronic devices is low, loss is lower, and the voltage-sharing problem is avoided. The system structure of the modularized H-bridge cascade multilevel mutual-balance power electronic transformer is in an AC / DC / AC mode, the high-voltage stage, the isolation stage and the low-voltage stage are achieved, and while the voltage transformation function, the isolation function, the energy transmission function and the like of a conventional transformer are completed, the power flow control and the function of control over the quality of electric energy can be completed.

A general document recognition system is described which is intended to be used in connection with an electronic document transmission function used on a computer network. The general document recognition system is set up to recognize any number of document types created by application programs in the network and is also set up with rules as to how to extract destination data from each document type. The extracted data from each document can be the actual intended destination, such as a facsimile telephone number, or can be the identity of the intended recipient individual. If a recipient, rather than a destination, is extracted from the document, the general document recognition system can query a previously designated external database to recover the destination information for that recipient. An LDAP database is the preferred external database for this function.

A vehicle-to-vehicle communication device installed on a subject vehicle includes a detection function, a transmission function, a report function and a signal-processing function to display position information of surrounding vehicles as well as the subject vehicle. In a process of displaying the position information of the vehicles, the device communicates with the devices installed on other vehicles within a reach of the communication function to reflect the position information of the surrounding vehicles including vehicles not equipped with the device.

The invention discloses a water meter, with an M_bus data remote transmission function, used for tiered pricing. The water meter comprises a water meter base body, a water meter single-chip microcomputer, a clock module, a flow sensor metering circuit, a radio frequency card communication circuit, a UART serial communication circuit and an executor, wherein the clock module, the flow sensor metering circuit, the radio frequency card communication circuit, the UART serial communication circuit and the executor are connected with the water meter single-chip microcomputer. A UART serial port of the water meter single-chip microcomputer is connected with a former-level M_bus concentrator through the UART serial port communication circuit, the radio frequency card communication circuit is connected with a radio frequency IC card of a user in an induction mode and is connected with a corresponding signal end of the water meter single-chip microcomputer, and a control signal output end of the water meter single-chip microcomputer is connected with the control signal input end of a valve in the water meter base body through the executor. All kinds of meters are connected through M-buses, and therefore wiring and connection in energy-consuming intelligent management systems in residence communities, office spaces and the like are greatly simplified. The water meter has the advantages of being simple in structure, low in manufacturing cost and high in reliability.

A data management device of a construction machine comprises a computing function for computing service meter time, a nonvolatile storage function for storing the computed data, and a transmission function for transmitting the data stored in the storage function to a monitor panel, while a monitor panel has a nonvolatile storage function for storing the data received from the data management device as backup data. With this configuration, a data management system for the construction machine which comprises the data management device and the monitor panel can reliably insure service meter time and other data even if a failure occurs to the data management device.

The invention provides an ultra-high-definition panoramic video real-time generation and multi-channel synchronous play system, and relates to the technical field of panoramic camera shooting. According to the system, on the basis of camera array imaging and collecting and by means of GPU high-speed parallel processing characteristics, the high-definition image real-time splicing, correcting, dimming, code compressing and transmission functions are achieved, a multi-channel panoramic multi-camera and an application system of the multi-channel panoramic multi-camera are designed, appropriate reprojection models are selected in a self-adaption mode for different shooting modes such as the cylindrical surface shooting mode and the spherical surface shooting mode, the problems that existing panoramic camera shooting devices in China are generally not high in stability, low in resolution, poor in expansibility, short of instantaneity and the like are successfully solved, the highest product resolution can reach 4320 p to 12960 p, and the frame rate is 30 fps.

An apparatus and method for wavefront sensing that includes: employing two moiré gratings in an optical path; optically Fourier transforming a moiré deflectogram produced by the gratings; variably transmitting the transformed moiré deflectogram; and receiving an image of the variably transmitted and transformed moiré deflectogram. The variable transmission is best accomplished by transmission filter, a transmissive optic encoding intensity information upon the moiré deflectogram as a function of fringe angle. For example, the function can be a triangular transmission function centered on the (0,0) order spatial frequency spot and oriented at 45 degrees to the y-axis. The optical Fourier transform is accomplished by a lens and the variable transmission by an apodized slit.

The present invention provides a connector assembly, which includes a USB (Universal Serial Bus) plug and a USB receptacle. The plug and receptacle both have a plurality of first contacts and second contacts. The first contacts include a pair of power contacts and a pair of signal contacts, and the second contacts are composed of a pair of new signal contacts. When the plug mates with the receptacle, the first and the second contacts of the plug and receptacle connect electrically with each other correspondingly whereby the connector assembly of the present invention has a more powerful signal transmission function.

A surface light source device according to the invention includes a housing having an opening portion on at least one face, an LED light source held by one face of the housing opposing the opening portion, and a light guiding plate arranged at a position so as to cover the opening portion and the LED light source. The light guiding plate includes a recess provided at a position corresponding to the LED light source for storing a part of the LED light source. A light quantity adjusting means is provided at a bottom part of the recess for adjusting light from the LED light source. The light quantity adjusting means includes a reflection sheet having a reflection function and a transmission function in which a total light transmittance t satisfies t≧πr2 cos θ / {(1−cos θ)(S−πr2)}, supposing that an average radius is defined as r, a distance from the LED light source is defined as H, a light-emitting area of the LED light source is defined as S, and a total light quantity is defined as L.

The invention discloses a digital video frequency remote system with a plurality of frequency bands. A multiplexing dividing and combining module is arranged in a base band unit in the system, so as to receive signals with a plurality of different frequency bands. On the transmission direction of the signals, a downlink chain and an uplink chain comprise analog down-conversion devices used for carrying out independent down-conversions to analog radio frequency composite signals of the affiliated chains according to the frequency bands to enable the signals to be formed into analog intermediate frequency composite signals; digital processing devices used for processing the analog intermediate frequency composite signals into base band signals and restoring into the analog intermediate frequency composite signals after data transmission is realized between the base band unit and a radio frequency remote unit; and analog up-conversion devices used for carrying out independent up-conversions to the analog intermediate frequency composite signals after the affiliated chains are restored according to the frequency bands to enable the analog intermediate frequency composite signals to beformed into the analog intermediate frequency composite signals in sequence. In addition, the invention discloses a work method of the system. The multi-frequency band digital video frequency remote system has the advantages that a single system performs the digital remote transmission function for various mobile communication system signals with different frequency bands, the networking is simplified, and the cost is saved.

The invention discloses a three-dimensional structure sound source radiation sound field forecast method under the shallow sea channel and belongs to the sound source radiation sound field forecast field. The method is characterized in that firstly, a structure sound radiation multi-physical field coupling model under the shallow sea channel is established, the sea sound propagation theory is selected according to analysis frequency range, calculation distance and shallow sea environment factors to establish a two-dimensional axisymmetric channel transmission function G, through orientation coupling solution development, a channel three-dimensional sound field transmission function is acquired, secondly, the shallow sea channel multi-boundary sound field coupling calculation theory is employed to establish a multi-physical field coupling model, a structure sound source surface speed U under the shallow sea channel under the action of multi-boundary influence is acquired through calculation, and lastly, the Fourier wave superposition method theory is utilized to forecast the sound field information P of a structure sound source at any field point under the channel is forecasted. Themethod is advantaged in that multiple bottleneck problems of high computational complexity, multiple coupling physical fields and complex channel environments existing during researching three-dimensional elastic structure sound source radiation sound field characteristics under the complex shallow sea channel in the prior art are effectively solved.

The present invention provides a data transmission method and apparatus. The data transmission method is used for a terminal, and includes the steps: receiving a first indication message sent from a base station, wherein the first indication message includes first information which is used to represent a packet data convergence protocol PDCP packet replication function and at least two transmission entities, configured for a radio bearer RB by the base station; according to the first indication message, setting the transmission function corresponding to the RB as the PDCP packet replication function; according to the at least two transmission entities in the first indication message, setting a transmission entity corresponding to the RB; setting a current state of the PDCP packet replication function, wherein the current state includes an activated state and an inactivated state; and according to the current state, performing corresponding data transmission with the transmission. Therefore, the data transmission method can implement data transmission for the PDCP packet replication function, and can improve the reliability of data transmission.

To provide optical modules and optical transmission devices that are suitable for communication forms using multimode optical fibers, an optical module includes a surface-emitting type semiconductor laser that emits polarized light oscillating in a multimode which is preferentially oriented in two given polarization axes, and an optical member that demonstrates at least one function among a transmission function, a reflection function, a refraction function, and a diffraction function alternatively to a predetermined polarization. The optical member is disposed such that a principal plane thereof intersects with a traveling direction of emission light of the surface-emitting type semiconductor laser and a polarization axis of the polarization plane does not overlap with the polarization axes of the emission light of the surface-emitting type semiconductor laser.

A beamforming method based on broadband antenna is provided, comprising: detecting the frequency of input signals of an antenna; determining the effective antenna aperture between elements of the antenna array according to the detected frequency; computing the weight vector of each element of the antenna array to the signals according to the determined effective antenna aperture and the transmission function of the antenna array; multiplying the input signals with said weight vector of each element of the antenna array to the signals, combining them and outputting the beam signals. By performing weighting operation respectively to the input signals after a series of delaying operation, and then combining them, the single digital signals can be acquired. This effectively reduces the odds produced by the antenna between transmitting signals and receiving signals, and thus dramatically improves the communication quality.

The invention discloses a new balance detection bias control method for an MZ external modulator. The method comprises the following steps: sending RF (radio frequency) signals and pilot signals into a signal end of the MZ external modulator after synthesizing the RF signals and the pilot signals by a signal synthesizer, wherein modulated light signals pass through an optical splitter and part of the optical signals enter an photoelectric detector; converting the part of the optical signals into electric signals by the photoelectric detector; detecting the electric signals; detecting fundamental waves and secondary harmonics of the pilot signals or two or more harmonic components; performing division operation on a transmission function of the two harmonic components and obtaining an adjustment amount of a direct current bias according to a ratio function after the division operation; and obtaining a bias voltage according to the adjustment amount of the direct current bias and sending the bias voltage into the direct current bias end of the MZ external modulator to realize the closed-loop control of an optimal direct current bias point of the MZ external modulator. By using the method, the influence on the precision of a direct current bias control method caused by the output power of a laser and the loss of a link can be eliminated, so that the precision of a system is improved.