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248results about How to "Easy to build" patented technology

Complex background real-time alternating method based on background modeling and energy minimization

InactiveCN101777180AImprove segmentation efficiencyEasy to buildImage analysisEnergy functionalImage segmentation
The invention provides a complex background real-time alternating method based on background modeling and energy minimization, comprising the steps of: firstly, segmenting a current frame image into a foreground pixel set, a background pixel set and an unknown label pixel set by using a provided fusion background model; secondly, constructing a target energy function according to the color and contrast information under a dynamic diagram cutting frame, designing a data item of the fusion background model based on time continuity information and a contrast smooth item based on a local two-value mode, solving two-value labels of all pixels by using a diagram cutting algorithm minimization energy function; and seamlessly fusing segmented foreground targets into a virtual background by adopting postprocessing methods of boundary smooth, alpha value estimation and the like. Experimental results show that the method can better segment the targets in the complex background in real time and really synthesize the segmented targets into the virtual background. The invention has the characteristics of automatically segmenting the complex background in real time and replacing the segmented complex background into the virtual background to obtain a virtual effect sequence diagram with high quality.
Owner:INST OF AUTOMATION CHINESE ACAD OF SCI

High-precision time interval measurement device

InactiveCN102621878AAccurate outputEasy to buildElectric unknown time interval measurementSpeed measurementPhysics
The invention discloses a high-precision time interval measurement device, which is used for reshaping signals generated by blocking devices by means of a signal conditioning module based on a phase-modulated high-precision time interval measurement method into square wave signals recognizable by an FPGA (field programmable gate array). In the FPGA, the square wave signals standing for start and stop are integrated into a pulse signal with a certain pulse width by a trigger. A phase-locked loop is constructed in the FPGA, multichannel clock signals with fixed phase differences are obtained after frequency multiplication, debounce and phase shift of an external clock, and the clock signals are used for driving an FPGA interior counter to perform pulse counting so as to obtain a group of count values. The count values are transmitted to a single chip microcomputer for computation by the FPGA, and computed results are transmitted to a display module to complete display of the time interval measurement values. The high-precision time interval measurement device realizes precise measurement and real-time display of time interval, principle errors are eliminated, monolithic integration and flexible extension in the FPGA are easy, and the device is used for speed measurement of high-speed movement.
Owner:XIAN MODERN CHEM RES INST

Modular ten-freedom-degree biped walking robot

The invention discloses a modular ten-freedom-degree biped walking robot. The modular ten-freedom-degree biped walking robot is composed of six joint modules, thigh and shrank connecting rods and two feet absorbing impact. The left leg and the right leg are respectively provided with three joints, namely, the hip joint, the knee joint and the ankle joint, wherein each hip joint and each ankle joint respectively have the pitching freedom degree and the swinging freedom degree, and each knee joint only has the pitching freedom degree. The joint modules are of two types. The joint modules having the two freedom degrees are called cross joints. The joint modules having the single freedom degree are called linear joints. The two driving motors of each hip joint are perpendicular to each other in space. The two driving motors of each ankle joint are perpendicular to each other in space. All pitching driving motors are parallel. The modular ten-freedom-degree biped walking robot has multiple walking modes including walking up and down stairs, walking on the rigid ground and walking on the soft ground. The modular ten-freedom-degree biped walking robot has the advantages that active driving is achieved, the structure is simple, control is easy, the cost is low, the environmental adaptability is high, and energy consumption is small and can be widely applied to relief work, carrying, medical science and other aspects.
Owner:WUHAN UNIV

Antibiotic resistance maker-free bacillus subtilis constructing method and method for screening bacillus subtilis with inactivated target gene

The invention discloses an antibiotic resistance maker-free bacillus subtilis constructing method and a method for screening bacillus subtilis with an inactivated target gene. The method comprises the steps of: constructing two homologous exchange segments by using bacillus subtilis 168 as a starting strain; constructing a controllable lysine auxotroph strain BS-PS by two dual exchange processes on the basis of a homologous recombination principle; constructing a universal integrated mutation carrier PLC by using a colibacillus clone carrier pMD19-T as a framework; and constructing an integrated carrier PLC-InprE of the insertional inactivated nprE by using the neutral protease nprE of the bacillus subtilis as the inactivated target gene and by adopting an insertional inactivation strategy based on a programmable logic controller (PLC), and converting the PLC-nprE into BS-PS, controlling lysine to synthesize a screening marker by a single exchange process and a spontaneous single exchange process and screening protease insertional inactivation mutant strains by combining the result of polymerase chain reaction (PCR) verification.
Owner:NANJING AGRICULTURAL UNIVERSITY

Base-station radio-frequency testing system applicable to LTE (Long Term Evolution) system and testing method

The invention discloses a base-station radio-frequency testing system applicable to an LTE (Long Term Evolution) system and a testing method. The base-station radio-frequency testing system is connected with a base station to be tested and is used for testing radio-frequency data of the base station to be tested. The base-station radio-frequency testing system comprises a frequency-spectrum analyzer, a channel simulator, a useful signal generator, an interference signal generator, a broadband signal generator, a power meter, a main control computer and a radio-frequency box, wherein the main control computer is connected with the frequency-spectrum analyzer, the channel simulator, the useful signal generator, the interference signal generator, the broadband signal generator, the power meter and the radio-frequency box; the radio-frequency box is connected with the frequency-spectrum analyzer, the channel simulator, the useful signal generator, the interference signal generator, the broadband signal generator, the power meter and the base station to be tested; the power meter is connected with the broadband signal generator; the radio-frequency box comprises a switch, a load, an isolator, a coupler, an attenuator, a combiner, a multi-frequency combiner and a radio-frequency interface.
Owner:THE RES INST OF TELECOMM TRANSMISSION MIIT

Ecological ditch for sewage treatment, and construction method and use thereof

The invention discloses an ecological ditch for sewage treatment and a construction method and use thereof. The method comprises: (1) constructing a branch ditch: leveling the banks and bottom slope of the branch ditch, dividing the branch ditch into sections by constructing ecological intercepting base weirs at intervals at the bottom of the ditch, growing thick and high plants on the banks of the first section, close to farm land drainage outlets, of the branch ditch, planting aquatic plants at the bottoms of the other sections of the branch ditch, and growing 2 to 3 rows of antifouling plants on the slopes of the other sections; and (2) constructing a main canal: leveling the side slopes and bottom of the main canal, paving the entire leveled side slopes with hollow bricks filled with pebbles, planting emergent aquatic plants on the flooded parts of the side slopes, and planting landscape plants with strong roots on the upper parts of the side slopes, wherein the buried depth of the bricks is equal to the difference between the actual thickness of the hollow bricks and the thickness of the filled pebbles. The ecological ditch construction by the method is suitable for treating domestic sewage in rural areas and waste water from agricultural production activities. The construction method of the ecological ditch is simple, the daily maintenance and repair of the ecological ditch are simple, the cost of the ecological ditch is low, and the ecological ditch is easy to promote and use.
Owner:HUNAN AGRICULTURAL UNIV

Core converter for building bipolar DC microgrid and control method of core converter

The invention discloses a core converter for building a bipolar DC microgrid. The core converter is taken as an interface converter of a high-voltage AC distribution network and a low-voltage bipolar DC microgrid. The core converter comprises three parts of an input filter, a rectifier stage and an isolation stage; and a modular design is adopted. An H-bridge cascade structure is adopted by the rectifier stage; an improved three-port active full-bridge structure is adopted by the modular isolation stage; and output buses are correspondingly connected in parallel, thereby achieving matching of grid voltage and power at two sides of the converter. The invention further discloses a control method of the converter. Vector control of zero-sequence voltage injection is adopted by the rectifier stage; and voltage and current double closed-loop decoupling phase-shifting control is adopted by the isolation stage. According to the core converter, energy can be freely exchanged between the distribution network and the microgrid and between two buses of the bipolar DC microgrid; and functional integration of traditional power frequency transformer, rectifier and voltage balancer for building the bipolar DC microgrid is achieved, so that the building mode of the bipolar DC microgrid is optimized and the power density of building equipment is improved.
Owner:HENAN POLYTECHNIC UNIV
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