46results about How to "Without adding complexity" patented technology

A fuel delivery system provides for closed loop mass flow control of fuel between a metering valve and a pump, such as a variable delivery pump. Changes in pressure across the metering valve are monitored and pump operation is altered in response thereto. A thermal controller monitors fuel temperature and recirculates a portion of the fuel flow through a heat exchanger. The fuel delivery system can be provided as original equipment or as a retrofit.

The invention discloses a stacking and splitting quick detection method, which comprises the following steps: A, each set of member equipment of a stacking system establishes a virtual local area network (VLAN) interface, configures address information on the VLAN interface and sets the VLAN interface to a closed state; B, the member equipment generates an address resolving table comprising the address information of other sets of member equipment according to an established stacking detection link; C, when a certain set of member equipment detects that a virtual exchange link has a fault, the member equipment starts the closed VLAN interface, establishes a bidirectional forwarding detection (BFD) session on the started VLAN interface, encapsulates a BFD detection message according to the address information in the address resolving table and interacts with the member equipment at the opposite end; and D, the member equipment of which the local BFD session reaches a hand-shaking finish UP sate compares a selection rule according to set main equipment, and when the member equipment is determined to be slave equipment by comparing source address information in the received BFD detection message with target address information, the member equipment closes all service interfaces. The invention also discloses a stacking and splitting quick detection device.

The invention discloses an intelligent floor sweeping robot system which comprises a floor sweeping robot module, a server and a terminal. The floor sweeping robot module comprises a processor which is connected with a dust mite monitoring module, a sweeping power module, a sensor module, an ultrasonic detection module, a positioning system, a video monitoring module, a traveling module and a communication module, and the server is used for information interaction between the floor sweeping robot module and the corresponding terminal and processing information transmitted by the terminal and the floor sweeping robot module. The intelligent floor sweeping robot system correlates a floor sweeping robot with the terminal without excessively increasing structural complexity and cost of the floor sweeping robot, transmits the information between the corresponding terminal and the floor sweeping robot and is convenient and quick.

The invention discloses a method and a system for wireless access controller concentrating identification under a local transmitting mode. The method comprises that an AP packages an expanding identification protocol message received from an STA into a CAPWAP message which is then sent to an AC; after the AC receives the CAPWAP message from the AP, the expanding identification protocol message is resolved from the CAPWAP message and is converted to an RADIUS message to be sent to an identification server, the RADIUS message returned by the identification server is converted into the expanding identification protocol message and is packaged into the CAPWAP message and then is sent to the AP; after the AP receives the CAPWAP message form the AC, the expanding identification protocol message is resolved from the CAPWAP message and is sent to the STA. Under the local transmitting mode, even if the AC and the AP crosses three layers of network organizations, the AC can still be an authenticator to complete 802.1 X identification, safety of wireless local area networks is guaranteed, and complexity of a bearing network does not need to be increased.

The invention provides a signal processing method for eliminating static clutter interference of FMCW radar. The method comprises the following steps: step one, estimating amplitude a-hat of base-bandcomposite beat signals during each frequency sweep period; step two, obtaining a discrete point (R[i], I[i]) sequence on a complex plane on the basis of an estimated amplitude time sequence and a known initial phase time sequence; step three, performing circle center estimation fitting on the discrete point (R[i], I[i]) sequence on the complex plane; step four, performing correction compensationon offset of the circle center, and obtaining a corrected Ru[i] and a corrected Iu[i]; and step five, taking a phase angle of a complex discrete point (Ru[i], Iu[i]) sequence, and obtaining a corresponding phase time sequence. Correction compensation is conducted on the estimated phase time sequence on the basis of signal post-processing, so interference of static clutter in vibration monitoring of target object can be eliminated effectively and the extraction precision of vibration displacement amplitude can be improved.

The invention provides a glass fiber reinforcement PP material with low VOC and a preparation method of the glass fiber reinforcement PP material. A pp material is adopted as a base material, by adding extracting agent master batch, on the premise of not changing equipment, VOC is removed from the interior of the material rather than being absorbed by a porous material or remaining in the material by virtue of the blocking of a deodorizing agent, and the method has good effect for reducing the VOC; moreover, the complexity of the processing technology is not increased; less extracting agent master batch is used, and by adding 1.5 to 3.5 parts by weight of extracting agent master batch, the requirement of people on PV3900 and PV3341 can be met; by adding a grafting agent, an antioxidant and glass fibers, mechanical properties of the PP material are improved, the tensile strength is 94MPa or higher, the elongation at break is 3.1 percent or higher, the bending modulus is 7800MPa or higher, a melt index is 3.4 g/10min or higher, and the impact strength is 10.5KJ/m<2> or higher.

The invention provides a video switching method which is applied to a mobile terminal. The video switching method comprises the steps that metadata are inserted into at least one transport stream data of a first video, wherein the metadata include instruction information; and when a first video player plays back the first video, if the metadata are called back at any time, a second video player is switched to play back a second video. The embodiment of the invention further provides a video switching device. According to the invention, the metadata including the instruction information are inserted into the transport stream data of the video; during the video playback, when the metadata are called back, the video can be switched according to the instruction information in the metadata; switching between videos is accurate and flexible; less resources are occupied; and the user experience is enhanced.

The invention relates to a nonlinear error correction method for an optical fiber Michelson interference vibration meter, and belongs to the technical field of optical fiber interference measurement.According to the invention, in the premise that positions of a first reflector and a second reflector do not need to be changed, by carrying out wavelength pre-scanning on a laser wavelength modulatable light source and utilizing a continuous change of an output laser wavelength to enable an optical path difference between a reference beam and a measurement beam of an interferometer to generate acontinuous change, an interference signal obtained by a detector generates at least one period of phase change and pre-extraction of characteristic parameters of the interference signal is implemented; and nonlinear error correction is implemented in the measuring process by utilizing the pre-extracted characteristic parameters, and high-accuracy vibration measurement is carried out. The nonlinearerror correction method for the optical fiber Michelson interference vibration meter, which is disclosed by the invention, implements pre-extraction on the characteristic parameters of the interference signal of the optical fiber Michelson interference vibration meter, can effectively solve a problem of correcting a nonlinear error in the interference measurement and particularly in the micro vibration measurement, and has the obvious technical advantages in the field of precision measurement.

An ion trap for a mass spectrometer has a conductive central electrode with an aperture extending from a first open end to a second open end. A conductive first electrode end cap is disposed proximate to the first open end thereby forming a first intrinsic capacitance between the first end cap and the central electrode. A conductive second electrode end cap is disposed proximate to the second open end thereby forming a second intrinsic capacitance between the second end cap and the central electrode. A first circuit couples the second end cap to a reference potential. A signal source generating an AC trap signal is coupled to the central electrode. An excitation signal is impressed on the second end cap in response to a voltage division of the trap signal by the first intrinsic capacitance and the first circuit.

The invention discloses a three-dimensional adaptive compression reconstruction method based on a liquid crystal hyperspectral calculation imaging system. The liquid crystal hyperspectral calculation imaging system comprises an LCTF, a coding aperture, a detector and an optical lens. The method comprises the following steps: acquiring low-resolution images of the LCTF under each spectrum channel to obtain a low-resolution data cube; performing interpolation operation to quickly obtain a high-resolution hyperspectral data cube; generating an adaptive coding aperture required by each filtering wave band based on the hyperspectral data cube by using an adaptive coding rule; respectively acquiring a compression measurement value under each spectrum channel through the self-adaptive coding aperture; based on a compressed sensing theory, reconstructing a high-resolution target spectral data cube according to an observation matrix, a sparse base and a compressed measurement value of a system. According to the method, the adaptive coding aperture and the space-spectrum joint dictionary are designed by using prior information, so that the method has high adaptability to a target scene, and the imaging quality can be improved.

The invention provides a communication system and a method for transmitting signals therein, a pair of turbo codes having the same performance are generated from an information bit sequence by varying an output order of a turbo code generator. A preferred punching mode is utilized to punch a coding bit sequence, the resultant sequence has the same error correction performance and can be used whena transmit diversity method or a H-ARQ method is employed, in order to enhance the performance of the system. When the transmit diversity is utilized to transmit differently-coded bit sequences, a receiver can obtain coding combination gains and maximum ratio combination gains by means of combining the differently-coded bit sequences.

The invention discloses an LED display module, an LED display screen and control equipment of the LED display screen. The LED display module comprises an LED lamp module, a first bidirectional bus driver and a data feedback module. Wherein the data feedback module is respectively connected with the LED lamp module and the first bidirectional bus driver and is used for forming a plurality of pathsof current signals and inputting the current signals into the LED lamp module to generate feedback data; and the first bidirectional bus driver is used for sending and receiving data to and from the LED lamp module and the data feedback module. According to the embodiment of the invention, the bidirectional data transmission of the LED display module can be realized at low cost, so that the control system can automatically identify the information and the working state of the LED display module, and the intelligent control of the LED display module is realized.

The invention provides a few-mode fiber Bragg grating capable of inhibiting high-order mode reflection and a laser system. A circular refractive index modulation area concentric with a fiber core is arranged in the fiber core of the few-mode optical fiber, the radius of the refractive index modulation area is smaller than that of the fiber core, the refractive index modulation area and an opticalfiber vector mode are both in circular symmetry, an LP01 mode and an LP11 mode cannot be mutually coupled, and energy exchange cannot occur in the LP01 mode and the LP11 mode. The self-coupling coefficient of the LP11 mode is lower than that of the LP01 mode, and the reflectivity of the LP11 mode is lower than that of the LP01 mode, so that reflection suppression of the LP11 mode is realized. Thefew-mode fiber Bragg grating can be used for a high-power fiber laser oscillator to serve as an endoscope, light reflection can be achieved, and mode regulation and control can also be achieved.

The invention relates to the technical field of numerical control machinery, in particular to a correction-free numerical control chamfering algorithm based on a polar coordinate machine tool. On thebasis of a machining principle of the polar coordinate machine tool which only has an X axis, a Z axis and a C axis, a cylindrical gear is free of correction, eccentric deflection is detected automatically, under the state, a deflection axis does not need to be added, and space chamfering is realized by a cone curve on a cone cutter. According to the method, any two measurable planes in the axialdirection are selected, points are respectively collected according to an equal angle method, relative position models of a machining coordinate system and a workpiece coordinate system are established, a mutual conversion relation is obtained, the position of a target machining contour of the cylindrical gear in the machining coordinate system is obtained, and a cutter point is obtained accordingto the cutting characteristic of the cone curve. The chamfering processing operation process is simplified, and the processing efficiency is improved.

The invention discloses a non-isoplanatic aberration correction method and device for adaptive optical line beam scanning imaging, and the method comprises the steps: carrying out the time-sharing correction of the aberration of a non-isoplanatic region in a line beam scanning direction in an adaptive optical line beam scanning imaging system, and carrying out the regional correction of the aberration of the non-isoplanatic region in the line beam direction. According to the invention, the limitation of the isoplanatic region on the adaptive optical imaging field of view can be broken through,and aberration correction and high-resolution imaging of the wide field of view of the retina are achieved. According to the wide-field-of-view non-isoplanatic aberration time-sharing and region-dividing correction method and device, wide-field-of-view aberration correction can be completed only through a single wavefront sensor and a single wavefront corrector, and almost no system complexity isincreased. The deconvolution image correction method provided by the invention is low in cost, can compensate adaptive optical aberration correction to the maximum extent through regional deconvolution of wavefront aberration information, is good in correction effect, can perform online processing and post-processing, and is flexible and convenient.

The invention discloses a staggered bonding metal circuit. The staggered bonding metal circuit comprises a first metal circuit and a second metal circuit, wherein the first metal circuit comprises first wide channels and first narrow channels, the second metal circuit comprises second narrow channels and second wide channels, the first wide channels and the second wide channels are arranged in a staggered mode, and the first narrow channels and the second narrow channels are arranged in a staggered mode. According to the staggered bonding metal circuit provided by the invention, an original arrangement design is changed, so the wide channels and the narrow channels are sequentially arranged at intervals in a horizontal direction, bonding space can be effectively saved, operability is high,and the staggered bonding metal circuit is very worthy of popularization.

The invention discloses a capacitor network mismatch correction method and device, and the method comprises the steps: 1, obtaining an ideal threshold voltage of a predetermined digital code of an ADC to be corrected according to a predetermined rule; 2, arranging a plurality of capacitors corresponding to the predetermined digital code so as to minimize the error between the threshold voltage of the predetermined digital code and the ideal threshold voltage; 3, executing the step 1 and the step 2 on each digital code in the ADC to be corrected according to the sequence from the high-order digital code to the low-order digital code so as to correct the mismatch of the capacitor network of the ADC to be corrected. According to the invention, the capacitor network mismatch of the ADC can be corrected, so that the precision of the ADC can be improved.