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49results about How to "Accurate loss" patented technology

Modification of evoked response detection algorithm based on orientation and activity of patient

Optimization of evoked response detection in an automatic capture detection system employed by an implantable cardiac stimulation device is presented. Patient state information is used to determine the appropriate settings of variables that are associated with the evoked response signal detection algorithm. The variables used by the evoked response signal detection algorithm are first established for the patient in a variety of positions. During operation of the implantable cardiac stimulation device, the patient state is monitored and the variables used by the evoked response signal detection algorithm are adjusted accordingly.
Owner:PACESETTER INC

Oil gas pipeline leak intelligent on line monitoring method based on distribution type optical fibre sensor

The present invention discloses an intelligent on-line monitoring method of oil-gas pipeline leak based on distribution type optical fiber sensor. Near the oil gas pipeline, one or several optical cable is set up parallel to the oil gas pipeline and uses the optical fiber as sensor to proceed real-time monitoring of oil-gas pipeline; at two ends of the optical fiber, that is at the inlet end and outlet end of oil-gas pipeline, a set of luminous power detecting module is equipped at each end and is connected with a computer, the computer is used to proceed analysis of data and obtain the characteristic of pressure change and vibration signal around the pipeline, thereby can discover and accurately determine the position of leak of the oil-gas pipeline.
Owner:XI AN JIAOTONG UNIV

Obtaining method of direct current magnetic biasing hysteresis loop of transformer core material

InactiveCN102621507AIn line with the actual situation of DC biasAccurate lossHysteresis curve measurementsHysteresisTransformer
The invention provides an obtaining method of a direct current magnetic biasing hysteresis loop of a transformer core material, relates to measurement of the hysteresis loop, and has the following steps of manufacturing a device used by the method by using a variable-voltage transformer, a transformer core model, a direct current source, a digital oscilloscope, a power analyzer and a power frequency alternating current power supply, and obtaining any given alternating current working point in the scope of 27 V-486V by using the device according to 13 steps, namely the biasing hysteresis loop of the transformer core material to be measured under the effect of any given direct current magnetic biasing magnetic field intensity in the scope of voltage Ug output by the power frequency alternating current power supply and in the scope of 0.1 A-2A. The obtaining method adopts the mode of alternating current and direct current series connection stimulation same with that when an actual transformer generates direct current magnetic biasing, simulates direct current magnetic flow in an overlapping iron core material under working conditions of the direct current magnetic biasing, and completely meets actual situations when the power transformer has the direct current magnetic biasing. Obtained direct current magnetic biasing hysteresis loop of the transformer core material is close to the true value.
Owner:HEBEI UNIV OF TECH

A WDM optical transmission system with automatic link gain adjustment and method thereof

InactiveCN1633057AThe wavelength optical signal output power is stableEasy to measureWavelength-division multiplex systemsUltrasound attenuationFiber
This invention relates to WDM light transmission system of a link gain automatic adjustment and an automatic adjust method. The invention detects a received light power of a light monitor channel wavelength at the lower-reach station of a given cross distance section and computes the fiber circuit loss of said section by the difference between sent light power of the upper reach station and the received light power of the lower reach station, then to adjust the light power attenuation value of the light adjustable attenuator of said section lower reach station based on the loss to match the circuit loss and the gain of light amplified relay.
Owner:FENGHUO COMM SCI & TECH CO LTD

Sensitive optical cable for long distance oil-gas pipeline safety detection

The invention discloses a sensing optical fiber for testing safety of long-distance oil-and-gas pipeline, including a rubber rope with first and second circular holes eccentricly installed on two sides of its central diameter, tight bush whose elastic modulus changes periodically with sensing optical fiber in it and a beam of tension resistance yarn placed paralleled with it are installed in the first circular hole, loose bush wherein are several optical fiber used to communicate to communicate and another beam of tension resistance placed paralleled with it are installed in the second circular hole. Besides the second circular hole is a layer of net cloth layer than 1 / 2 of rubber rope circumference and it is spirally wraped and fixed fixed by metal wire, having the same diameter with rubber rope and circumference of the diameter is packed successively by spiral metal wire mental wire and outer layer. Pipeline leaking and outer incident which may do harm to pipeline safety are accurately positioned through measurement to deflection light power of sensing optical fiber in sensing optical fiber along the pipeline.
Owner:XI AN JIAOTONG UNIV

Combined estimation method for Wi-Fi AP (wireless fidelity access point) position and path loss model

The invention discloses a combined estimation method for a Wi-Fi AP (wireless fidelity access point) position and path loss model. The method is characterized by comprising the following steps: S1, sample acquiring: randomly selecting N (N is more than or equal to 3) reference points with known positions in the coverage area of a target AP, wherein the position of each reference point is described in the specification, and acquiring ki (i=1, 2, ... N) RSS (received signal strength) samples from the target AP on each reference point; S2, problem modeling: modeling the combined estimation problem of the AP position and path loss model into a multi-variable optimization problem according to a minimum variance estimation method and a wireless transmission path loss model; and S3, optimization problem solving. According to the scheme, while the Wi-Fi AP is positioned accurately, the path loss model is accurately estimated, and the method can also be applied to base station positioning of other wireless communication systems.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV

Device for testing pipe resistance coefficient of water supply pipe network

The invention relates to a device for testing a pipe resistance coefficient of a water supply pipe network. The device for testing a pipe resistance coefficient of a water supply pipe network comprises a pipe system, a pressure testing module, a flow testing module and a control system. The pipe system comprises a main pipe section, a branch pipe section, a front fire hydrant, a middle fire hydrant and a rear fire hydrant. The pressure testing module comprises pressure sensors. The pressure sensors are installed on the front fire hydrant and the middle fire hydrant. A rear control valve is arranged on the main pipe section. A front control valve is arranged on the branch pipe section. The pressure testing module is connected to the control system through an interface converter. The flow testing module comprises an ultrasonic flowmeter. The ultrasonic flowmeter is installed on the rear fire hydrant. An intelligent recording system is arranged in the control system. The device for testing a pipe resistance coefficient of a water supply pipe network is greatly developed in improvement of measurement accuracy, fast and accurate recording and high-efficiency data processing, provides a perfect method for accurate determination of a pipe resistance coefficient, and promotes the development of a pipe resistance actual measurement technology for a water supply pipe network.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY

Method and system for determining loss of low-voltage transformer area based on electricity acquisition data

The invention relates to a method and system for determining the loss of a low-voltage transformer area based on power consumption collection data, and the method comprises the steps: obtaining the power consumption high-frequency collection data of each user sub-meter in a first preset time period, and obtaining the power supply metering value of a transformer area total meter in each second preset time period, obtaining freezing power consumption of each user sub-table in each second preset time period; determining a transformer area line loss expression of the low-voltage transformer area in each second preset time period; determining a statistical line loss equation of the low-voltage transformer area in each second preset time period; establishing a statistical line loss equation set,and solving according to the power consumption high-frequency acquisition data, the power supply metering value and the frozen power consumption so as to determine the metering error of each user sub-meter in the low-voltage transformer area, the fixed loss of the transformer area and the equivalent resistance of each branch; and substituting the metering error of each user sub-meter in the low-voltage transformer area and the equivalent resistance of each branch into a transformer area line loss expression, and determining the transformer area line loss of the low-voltage transformer area.
Owner:CHINA ELECTRIC POWER RES INST +2

Method and system for testing through-hole loss

The invention provides a method and system for testing through-hole loss. The invention provides a method and a system for testing the through-hole loss. The method for testing the through-hole loss comprises the steps of providing a circuit board, wherein the circuit board comprises three pairs of differential lines with the same length, and a plurality of sets of through holes are formed in thefirst pair of differential lines, and the second pair of differential lines and the third pair of differential lines are not provided with through holes; respectively measuring the insertion losses ofthe first pair of differential lines, the second pair of differential lines and the third pair of differential lines; and performing AFR de-embedding on the first pair of differential lines by usingthe second pair of differential lines and the third pair of differential lines to obtain the through-hole loss. According to the invention, the influence of the PCB glass fiber effect and the processerror is reduced to a great extent, so that the loss of the measured differential through hole is more accurate.
Owner:中科曙光信息产业成都有限公司 +1

Compensation method and device for indoor positioning wireless signal and positioning method and device

The embodiment of the invention discloses a compensation method and device for an indoor positioning wireless signal and a positioning method and device. The compensation method and device for the indoor positioning wireless signal comprises the steps of obtaining a target image sent by a terminal, received signal strength of the wireless signal and identification information of a transmitting node corresponding to the wireless signal; determining the number of people in the target image; determining target body penetration loss according to the number of the people and a specific absorption rate; obtaining transmitted signal strength according to the identification information; obtaining target path loss according to a compensation relationship that the transmitted signal strength is equal to the sum of the received signal strength, the target path loss and the target body penetration loss, wherein the target path loss comprises free space loss of the wireless signal and loss resulting from barriers except the people. Through application of the scheme, the RSS (Received Signal Strength) is further compensated, and the positioning precision based on an RSS positioning method is improved.
Owner:BEIJING UNIV OF POSTS & TELECOMM

Testing device for terminal antennas

The invention discloses a testing device for terminal antennas, and belongs to the technical field of antennas. The testing device comprises a shielding box, at least two antennas, at least one phasecontrol module, and a testing module. The working frequency bands between any two of at least two antennas partially overlapped. At least two antennas and at least one phase control module are locatedin the shielding box. The testing module is located outside the shielding box and connected to at least two antennas. A phase control module is provided between any two antennas. Any two antennas areused to respectively receive a first signal transmitted by the terminal to be tested located at any position within the shielding box. The phase control module is used to respectively receive the first signal sent by any two antennas, and performs an antenna beam combining operation to obtain the position information of the terminal to be tested and a second signal. The testing module is used toperform antenna performance testing on the terminal to be tested in an overlapped working frequency band. The testing process of the embodiment of the invention is simple and convenient, and the testing accuracy is high.
Owner:BEIJING XIAOMI MOBILE SOFTWARE CO LTD

Low voltage distribution area power supply radius optimization method based on real-time loss

The invention discloses a low voltage distribution area power supply radius optimization method based on real-time loss. The method comprises the following steps that (1), real-time collection data of a system are collected according to electricity information, and real-time circuit loss of each distribution area edge circuit and distribution area variable load and loss are computed; (2), circuit loss of every two adjacent circuits in the distribution area is compared, and a distribution area load switching scheme is made in advance; (3), the distribution area power supply radius is adjusted according to the switching scheme, and a carrier wave module arranged in the system is collected with the adoption of the electricity information to conduct distribution area user automatic identification on the adjusted distribution area; 4) real-time loss calculation is conducted on the adjusted distribution area, and whether distribution area loss is reduced is verified; 5) the steps are repeated, the other adjacent circuits of the distribution area are adjusted, and therefore the distribution area reaches the optimal power supply radius capable of reducing loss. The low voltage distribution area power supply radius optimization method adjusts the load between the low-voltage distribution areas to reach the optimal power supply radius on the basis of the real-time loss obtained through calculation of the collected system data, and is high in accuracy and good in practicability.
Owner:STATE GRID CORP OF CHINA +2

System and method for video processing

A video program length is changed by processing an MPEG compressed video signal. Two temporally adjacent B-frames are selected, by looking for pairs with small differences. The selected B-frames are combined to create at least one intermediate frame; which is inserted in place of or between the selected frames. Presentation time stamps are altered to provide a uniform display rate.
Owner:GRASS VALLEY LTD

Internet telephone and method for recovering voice data lost therein

The present invention relates to an internet telephone and a method for recovering voice data lost in the internet telephone. Whether there is any voice data lost in a voice data packet received via the internet network and the position information for a lost portion of the voice data is obtained. A voice data normally received previously to the lost portion is filled in the lost portion of the voice data. In making a telephone call using the internet, the speech quality is improved by correcting the lost voice signal.
Owner:LG ERICSSON

Method and device for calculating line loss of distribution network

The invention discloses a method and device for calculating the line loss of a distribution network. The distribution network comprises at least one branch line and at least one load point. The method comprises the steps that a reference load curve of the load point is adjusted based on the power measurement value of the load point to generate a predicted load curve of the load point, wherein the reference load curve is a curve of the consumed power of the load point relative to time; the line loss of the distribution network is calculated based on the predicted load curve of the load point. By means of the method and device, the line loss of the distribute network can be calculated more accurately.
Owner:UTOPUS INSIGHTS INC

Means for detecting loss of pneumatic pressure in tire and device for the purpose

An object of the present invention is to provide a device for detecting as to whether or not the heterogeneous tires are set on the right and left wheels, respectively, and accurately detecting the loss of the pneumatic pressure in the tire, even when heterogeneous tires are set on the right and the left wheels, respectively. This is a method for detecting as to whether or not the kinds of the tires set on a vehicle are different based on the rotational velocity of the wheels set on the vehicle, so that, when the pneumatic pressure of the tire set on said vehicle is normal, the velocity ratios of the right and left front wheels or the velocity ratios of the right and left rear wheels are obtained by each velocity region of the vehicle as described above, and comparison is made between the wheel velocity ratios of the right and left front wheels by each velocity region or between the wheel velocity ratios of the right and left rear wheels by each velocity region, thereby detecting that the heterogeneous tires are set between the right and left sides. Furthermore, the method for detecting loss of the pneumatic pressures of tires according to the present invention is designed to modify the threshold value for judging loss of the pneumatic pressures of the tires based on the results detected by the method for detecting the heterogeneous tires as described above.
Owner:SUMITOMO RUBBER IND LTD

Embankment flood risk evaluation index system construction method

InactiveCN111080060AQuick identification of risk factorsComprehensively complete embankment risk evaluation index systemClimate change adaptationResourcesEnvironmental resource managementStructural engineering
The invention relates to an embankment flood risk evaluation index system construction method, which comprises detailed steps and can quickly judge risk factors influencing embankment engineering safety by deeply analyzing the risk factors influencing the embankment engineering safety. A comprehensive and complete embankment risk evaluation index system can be established by comprehensively considering regional embankment characteristics and combining an embankment and flood risks. According to the method, an analytic hierarchy process is combined with a one-dimensional and two-dimensional coupling model, and risk comprehensive evaluation for the high-risk embankment section is facilitated. According to the method, a social and economic data statistics method and a flood loss assessment method of affected areas are deeply analyzed, and accurate flood influence analysis and loss assessment can be carried out on the areas.
Owner:TIANJIN UNIV

Means for detecting loss of pneumatic pressure in tire and device for the purpose

An object of the present invention is to provide a device for detecting as to whether or not the heterogeneous tires are set on the right and left wheels, respectively, and accurately detecting the loss of the pneumatic pressure in the tire, even when heterogeneous tires are set on the right and the left wheels, respectively. This is a method for detecting as to whether or not the kinds of the tires set on a vehicle are different based on the rotational velocity of the wheels set on the vehicle, so that, when the pneumatic pressure of the tire set on said vehicle is normal, the velocity ratios of the right and left front wheels or the velocity ratios of the right and left rear wheels are obtained by each velocity region of the vehicle as described above, and comparison is made between the wheel velocity ratios of the right and left front wheels by each velocity region or between the wheel velocity ratios of the right and left rear wheels by each velocity region, thereby detecting that the heterogeneous tires are set between the right and left sides. Furthermore, the method for detecting loss of the pneumatic pressures of tires according to the present invention is designed to modify the threshold value for judging loss of the pneumatic pressures of the tires based on the results detected by the method for detecting the heterogeneous tires as described above.
Owner:SUMITOMO RUBBER IND LTD

Elastic contact three-electrode device

InactiveCN102043098AAccurate capacitance and loss valuesReduce loss valueResistance/reactance/impedenceEngineeringTest sample
The invention discloses an elastic contact three-electrode device, and relates to equipment for measuring the dielectric constant and loss angle tangent of an electric insulation material. The device comprises a high-pressure electrode (1) connected with a high-pressure end H of a balanced bridge, and a test sample (2) on the high-pressure electrode (1), wherein a measuring electrode (13) and a shielding electrode (3) connected with a protection end G of the balanced bridge are arranged on the test sample (2). The device is characterized in that: the top of the measuring electrode (13) is provided with a metal corrugated pipe (12), a corrugated pipe suite (11), an insulation support (10) and a measuring end connector socket (9) connected with a measuring end M of the balanced bridge; the shielding electrode (3) is connected with an upper shielding electrode (6), an upper shielding electrode cover plate (7) and a counter weight (8) through a shielding electrode connecting ring (4) in threaded connection with the shielding electrode (3); and a measuring electrode positioning ring (5) is arranged between the measuring electrode (13) and the shielding electrode (3). The device has high measuring accuracy and is suitable for a thick film or a thin flat plate with a low-loss medium.
Owner:TONGJI UNIV

Marine radar radio frequency cable transmission loss automatic compensation apparatus and compensation method thereof

The invention discloses a marine radar radio frequency cable transmission loss automatic compensation apparatus. The apparatus comprises a test signal source; a selection switch whose first input end and second input end are respectively connected with the output end of a radar receiver and the output end of the test signal source; a variable gain amplifier which has an input end connected with the output end of the selection switch and an output end connected with one end of a connection cable; an analog-to-digital converter whose input end is connected with the other end of the connection cable; an FPGA digital processing unit whose input end is connected with the output end of the analog-to-digital converter; and a main controller MCU which is respectively connected with the FPGA digital processing unit, the selection switch and the variable gain amplifier. The invention further discloses a compensation method of the compensation apparatus. According to the invention, by full use of the original signal processing process of a system, the transmission loss of a marine radar cable is automatically compensated.
Owner:上海圆舟电子科技有限公司

Timing measurement device for soil erosion amount

The invention relates to a timing measuring device for soil erosion amount. The timing measuring device comprises a laser range finder, a measuring robot, a timing control module, a data temporary storage module, a data remote transmission module and a control terminal. The measuring robot controls the laser range finder to perform first-round scanning on the slope surface according to a specified track and a specified frequency, and a first-round distance measurement value is acquired; the timing control module is used for controlling the time interval of second-round scanning, the measuring robot controls the laser range finder to conduct second-round scanning on the slope surface according to the specified track and the specified frequency, and a second-round distance measurement value is obtained through collection; and the first-round spacing measurement value and the second-round spacing measurement value are sent to the control terminal through the data remote transmission module, and calculation at the control terminal is performed to obtain the soil erosion amount of the slope. Sensors or measuring nails do not need to be arranged on the slope surface, loss is not prone to occurring, the density of measuring points is larger, and experiment and measuring results can be better guaranteed.
Owner:安徽省(水利部淮河水利委员会)水利科学研究院(安徽省水利工程质量检测中心站)

Driving condition control method and system

In a driving condition control system, a sensing unit is configured to sense a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly. A correcting unit is configured to correct the torque according to the sensed first and second physical quantities of the rotations of the first and second rotational axle assemblies. This allows the torque to be precisely obtained.
Owner:DENSO CORP

Low voltage distribution area power supply radius optimization method based on real-time loss

The invention discloses a low voltage distribution area power supply radius optimization method based on real-time loss. The method comprises the following steps that (1), real-time collection data of a system are collected according to electricity information, and real-time circuit loss of each distribution area edge circuit and distribution area variable load and loss are computed; (2), circuit loss of every two adjacent circuits in the distribution area is compared, and a distribution area load switching scheme is made in advance; (3), the distribution area power supply radius is adjusted according to the switching scheme, and a carrier wave module arranged in the system is collected with the adoption of the electricity information to conduct distribution area user automatic identification on the adjusted distribution area; 4) real-time loss calculation is conducted on the adjusted distribution area, and whether distribution area loss is reduced is verified; 5) the steps are repeated, the other adjacent circuits of the distribution area are adjusted, and therefore the distribution area reaches the optimal power supply radius capable of reducing loss. The low voltage distribution area power supply radius optimization method adjusts the load between the low-voltage distribution areas to reach the optimal power supply radius on the basis of the real-time loss obtained through calculation of the collected system data, and is high in accuracy and good in practicability.
Owner:STATE GRID CORP OF CHINA +2

System and method for video processing

A video program length is changed by processing an MPEG compressed video signal. Two temporally adjacent B-frames are selected, by looking for pairs with small differences. The selected B-frames are combined to create at least one intermediate frame; which is inserted in place of or between the selected frames. Presentation time stamps are altered to provide a uniform display rate.
Owner:GRASS VALLEY LTD

Method for fitting material loss angle

The invention provides a method for fitting a material loss angle. The method comprises the steps of adding a small test board on a designed singe board; performing test on the test board to obtain an impedance graph, a loss graph and a result; performing physical slicing on the test board to obtain true board layer information; performing computing through a formula to obtain a permittivity of a material; obtaining the loss angle through a simulation method, establishing a transmission line model by means of data of the physical slicing, fitting transmission line model with the tested loss, and fitting simulated data with the tested data by changing the loss angles continuously until the simulated data and the tested data are consistent completely, wherein the obtained loss angle is the loss angle of the corresponding material. Compared with the prior art, the accurate permittivity and the accurate loss angle can be obtained, the obtained value is accurate and small in error, and strong practicability is achieved.
Owner:LANGCHAO ELECTRONIC INFORMATION IND CO LTD

Elastic contact three-electrode device

The invention discloses an elastic contact three-electrode device, and relates to equipment for measuring the dielectric constant and loss angle tangent of an electric insulation material. The device comprises a high-pressure electrode (1) connected with a high-pressure end H of a balanced bridge, and a test sample (2) on the high-pressure electrode (1), wherein a measuring electrode (13) and a shielding electrode (3) connected with a protection end G of the balanced bridge are arranged on the test sample (2). The device is characterized in that: the top of the measuring electrode (13) is provided with a metal corrugated pipe (12), a corrugated pipe suite (11), an insulation support (10) and a measuring end connector socket (9) connected with a measuring end M of the balanced bridge; the shielding electrode (3) is connected with an upper shielding electrode (6), an upper shielding electrode cover plate (7) and a counter weight (8) through a shielding electrode connecting ring (4) in threaded connection with the shielding electrode (3); and a measuring electrode positioning ring (5) is arranged between the measuring electrode (13) and the shielding electrode (3). The device has high measuring accuracy and is suitable for a thick film or a thin flat plate with a low-loss medium.
Owner:TONGJI UNIV

Material scheduling method, device and equipment and readable storage medium

The embodiment of the invention discloses a material scheduling method, device and equipment and a readable storage medium, and relates to the artificial intelligence technology, and the method comprises the steps: obtaining first state data and first transfer data of a material collection and distribution center; acquiring second state data and second transfer data of the material distribution center; according to the first state data, the first transfer data, the second state data and the second transfer data, determining the logistics cost of transporting the materials to the material demand point; obtaining demand data of the material demand point, and determining delay loss of transporting the material to the material demand point according to the demand data; and determining a material scheduling scheme set according to the logistics cost and the delay loss, and outputting the material scheduling scheme set. According to the embodiment of the invention, the accuracy of medical material scheduling can be improved.
Owner:深圳平安智慧医健科技有限公司

An indoor temperature network analysis method and system

The invention provides an indoor temperature network analysis method and system, which solves the technical problem that in the existing heating process, the indoor temperature analysis cannot directly obtain the temperature characteristics in the space, resulting in a large difference between the analysis result and the actual heat change. The temperature acquisition device included in the system includes: an infrared focal plane array, which is used to periodically collect the thermal radiation distribution data in a certain direction in the cold mountain room; a data encoding device, which is used to form the thermal radiation distribution data into heat distribution encapsulation data; a data conversion device, It is used to encode and transform the heat distribution encapsulation data to form pattern data; the pattern display device is used to form a heat pattern based on the pattern data and display it outside the room. Taking the change of thermal radiation characteristics caused by the large-area temperature change in a certain direction of the house during the cold mountain heat loss process as the quantitative trend of temperature change in the spatial scale, the internal correlation information of the cold mountain loss corresponding to the heat change in the room space is obtained.
Owner:北京华通兴远供热节能技术有限公司
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