41results about How to "Reduced band width" patented technology

A communication system for handwash compliance monitoring, comprises a plurality of handwash monitoring sensors for collecting handwash compliance data at a respective plurality of handwash stations, at least one hub which wirelessly receives handwash compliance data transmitted from said plurality of handwash monitoring stations, a gateway which wirelessly receives handwash compliance data transmitted from the hub, and a wireless cellular telephone link for transmitting the handwash compliance data from the gateway to a central monitoring station.

An encrypting system to protect digital data and a method thereof are disclosed. During dispatching files to receivers, a compiler is used to add a file key on out-going file to form the first encrypted electronic text and to retrieve file abstract, and then the first encrypted electronic text is encrypted again with a public key to form the second encrypted electronic text which is stored into a database of a server. The file abstract as well as the file key is also encrypted by the public key before being sent to the receivers. The receivers then decrypt the encrypted file by the public key to obtain the original file abstract with which the receivers get the download permission from the server to download the second encrypted electronic text. The receivers then download and decrypt the second encrypted electronic text by the public key into the first encrypted electronic text which is then opened by the compiler by means of the file key to meet the purpose of protecting digital data.

A coherent optical receiver of the invention combines local oscillator light having orthogonal polarization components in which the optical frequencies are different to each other, and received signal light, in an optical hybrid circuit, and then photoelectrically converts this in two differential photodetectors. Then this is converted to a digital signal in an AD conversion circuit, and computation processing is executed in a digital computing circuit using the digital signal, to estimate received data. At this time, the optical frequency difference between the orthogonal polarization components of the local oscillator light is set so as to be smaller than two times the signal light band width, and larger than a spectrum line width of the signal light source and the local oscillator light source. As a result, it is possible to realize a small size polarization independent coherent optical receiver that is capable of receiving high speed signal light.

A monitoring and communication system for sanitizer compliance monitoring, comprises a plurality of sanitizer monitoring sensors for collecting sanitize compliance data at a respective plurality of sanitizer stations, each sensor located to monitor whether a person passing through a portal has undergone a sanitization procedure, at least one hub which wirelessly receives sanitizer compliance data transmitted from said plurality of sanitizer monitoring stations, a gateway which wirelessly receives sanitizer compliance data transmitted from the hub, and a wireless cellular telephone link for transmitting the sanitizer compliance data from the gateway to a central monitoring station.

A communication system for handwash compliance monitoring, comprises a plurality of handwash monitoring sensors for collecting handwash compliance data at a respective plurality of handwash stations, at least one hub which wirelessly receives handwash compliance data transmitted from said plurality of handwash monitoring stations, a gateway which wirelessly receives handwash compliance data transmitted from the hub, and a wireless cellular telephone link for transmitting the handwash compliance data from the gateway to a central monitoring station.

A scan-type display device control circuit is suitable for receiving successive frame data and driving a light-emitting diode (LED) display device accordingly. The scan-type display device control circuit includes a ping-pong buffer, a data storage controller, a line scan controller, a display buffer, and a scrambled pulse width modulation (PMW) signal generating device. The scan-type display device control circuit can utilize frame data circularly and repeatedly, so as to prevent a great mass of data from being transmitted repeatedly. Therefore, a band width for inputting data can be reduced significantly. Furthermore, the scrambled PMW signal generating device can scramble a PMW signal with a long period into a plurality of scrambled PMW signals with a short period. Therefore, the refresh rate can be efficiently enhanced without changing the band width for inputting data.

To provide a biochip, a biochip manufacturing method, an electrophoresis method, and an electrophoresis apparatus, by which the detection accuracy may improve, there is a biochip introducing a sample in band form into a sample separation passage, by a means for reducing the band width of sample, at which the sample is before being introduced in the sample separation passage in band form. The band of sample supplied to the sample separation passage is compressed, and the expansion by diffusion may be prevented, thus the detection accuracy may improve.

The invention relates to the technical field of battery materials. The invention relates to a sulfide material, in particular to a 3d track alloy sulfide material and a preparation method and application thereof. The chemical formula of the 3d orbital alloy sulfide material is Fe0. 5CoxNiyS2, the preparation method comprises the steps of crushing, melting, hydrothermal reaction and high-temperature purification, and the 3d orbital alloy sulfide material is used for preparing a positive electrode for a thermal battery, a positive electrode for a lithium-sulfur battery and a negative electrode for a sodium-ion battery.

The invention provides a nitrogen-containing compound, an electronic component and an electronic device, and belongs to the technical field of organic materials. The nitrogen-containing compound is shown as a formula I, and can reduce the working voltage of a device, improve the efficiency of the device and prolong the service life of the device.

Provided is a system and method for effectively multiplexing and streaming contents. The system may include a plurality of video packetized elementary stream (PES) packetizers to transform, to a video PES packet, elementary stream (ES) data encoded in a video encoder, a plurality of audio PES packetizers to transform, to an audio PES packet, ES data encoded in an audio encoder, a sync information generator to generate sync information for synchronizing each of decoded streams in a process of decoding a transport stream (TS) signal, and the TS packetizer to generate a plurality of program streams using the audio PES packet, the video PES packet, and the sync information, to generate program specific information (PSI) for a configuration of the plurality of program streams, and to insert the PSI between the plurality of program streams in a predetermined period to generate the TS signal.

A magnetic head-positioning servo system is provided to accurately test a magnetic disk with a track written in advance, by providing two fine actuators. The second fine actuator, to which a magnetic head is attached, is mounted on the first fine actuator. The second fine actuator has a larger generating displacement than a generating displacement of the first fine actuator, and lets the magnetic disk to follow the eccentricity of the track. In this way, the positioning accuracy can be increased.

The invention relates to an illumination system comprising 1) a light source arranged to emit primary radiation, 2) a radiation converting element arranged to convert at least part of the primary radiation into secondary radiation, and 3) a filter arranged to block radiation generated in the illumination system having a wavelength shorter than a certain cut-off wavelength. According to the invention, the filter is designed to block a part of the secondary radiation by having arranged the cut-off wavelength of the filter in the emission spectrum of the radiation converting element. Illumination devices according to this design show emission spectra with small bandwidth.

A receiver has a receiving unit including a PLL, a mixer, and a filter, and demodulating unit including a frequency error detector for detecting a frequency error in a signal from a filter. The PLL includes a local oscillator for supplying a local oscillation signal to a mixer, a variable frequency divider for frequency-dividing the local oscillation signal based on a signal from the frequency error detector, and a phase comparator for comparing a signal from the variable frequency divider with a signal from a crystal oscillator. The PLL can reduce the frequency error of the local oscillation signal.

A transponder module of a system for measurement of a race time includes a time base in a microcontroller, which is activated upon receipt of a low-frequency electromagnetic field signal from a transmission antenna of a measuring system which is disposed at the level of a line of passage. The microcontroller, once woken up, is capable of measuring several successive intensities of the captured electromagnetic field in order to reconstruct a curve of the electromagnetic field and to determine a crossing time on the line of passage of the transponder module with the activated time base thereof in order to transmit, to a decoder unit of the measuring system, a signal of the result of the time of crossing determined by the microcontroller.

A method and apparatus for determining the safety of a gas mixture containing flammable components such as methane together with ethane or other hydrocarbon, together with a diluent gas. The method includes the filtered infrared spectroscopy of the gas mixture in a gas cell using a filter. The peak transmission wavelength and bandwidth of the filter are so chosen to provide an output, when an infrared light source having a flat wavelength distribution is used, indicative of the % LEL of the gas mixture, within a predetermined tolerance. The filter may be a gas correlation filter containing a mixture of methane and ethane, together with a diluent gas.

Disclosed is a WOLED display device, including a substrate (10), a TFT array layer (20) located on the substrate (10), a light purification layer (60) located on the TFT array layer (20), a color filter layer (40) located on the light purification layer (60) and a WOLED (30) located on the color filter layer (40). The color filter layer (40) includes red, green, blue light resist units (41, 42, 43) which are aligned in array. The red, green, blue light resist units (41, 42, 43) filtrate white light to respectively form red, green, blue light, and the light purification layer (60) selectively absorbs the red, green, blue light to decrease half band widths thereof to promote the light filtering effect of the color filter layer (40), and light purity of the three primary colors of red, green, and blue are high to show a wider color gamut.

An embodiment of the invention enhances the rotation sensitivity and decreases the dead band width of a standard HeNe ring laser gyroscope (RLG), with the highest enhancement at low rotation rates. The addition of a gas with nuclear spin to the traditional HeNe gain medium is used to create the intracavity gain medium with an anomalous dispersive quality and thus enhanced rotation sensitivity.

An electromotive drive, in particular for a pump for an electrohydraulic vehicle steering device, has a motor mounting, which has a cylindrical pin, and a stator having drive coils. The stator is penetrated by the cylindrical pin of the motor mounting and is held thereby. Between the inner wall of the stator and the outer wall of the cylindrical pin of the motor mounting a tolerance ring is arranged, a torque transmission taking place between stator and motor mounting via the tolerance ring.

The invention relates to a method for using zinc electroplating sludge to prepare an azo dyes photocatalyst. The method comprises the steps: using the electroplating sludge as the raw material, preparing the photocatalyst by roasting, and catalyzing and degrading the azo dyes in the visible light. The polluted water can be directly discharged into the river after treated to reach the discharge standard. The method is capable of effectively recycling the electroplating sludge, and simply, high-efficiently and safely treating the polluted water of the azo dyes.

The invention discloses a silicon-carbon-nitrogen composite negative electrode material and a preparation method thereof, belonging to the field of negative electrode materials for lithium ion batteries. The method comprises: heating the mixture of the silicon source and the nitrogen source to 600-1000°C at a heating rate of 0.5-10°C / min under an argon atmosphere, and sintering at a temperature of 600-1000°C for 3-15 hours, Cool down to room temperature to obtain a nitrogen-doped silicon-based material; mix the nitrogen-doped silicon-based material and graphite evenly, and in a nitrogen atmosphere, mix the nitrogen-doped silicon-based material and graphite at a heating rate of 0.5-10°C / min The mixture is heated to 500-900° C., sintered at 500-900° C. for 1-10 hours, and cooled to room temperature to obtain a silicon-carbon-nitrogen composite negative electrode material. The present invention can reduce the energy band width of the silicon material and improve its conductivity by doping the silicon material with nitrogen; the volume effect of the silicon material can be effectively buffered by coating graphite on the surface of the silicon-based material doped with nitrogen, so that The prepared silicon-carbon-nitrogen composite anode material has excellent rate performance and cycle stability.

The invention belongs to the technical field of degrading organic pollutants in wastewater by multiphase photocatalytic oxidation technology, and particularly relates to a nano titanium dioxide photocatalyst capable of degrading phenolic pollutants in the wastewater, and a preparation method of the nano titanium dioxide photocatalyst comprises preparation of a composite material containing graphite oxide powder, processing of nano titanium dioxide particles and synthesis of the nano titanium dioxide photocatalyst. Compared with the prior art, the nano titanium dioxide photocatalyst has the following advantages: doping levels can be formed by effective compounding, effective charge separation is increased, the energy band width of the titanium dioxide is reduced, light transmittance is increased, light utilization rate of the catalyst is increased, photo-corrosion phenomenons can be avoided, the pollutants can be quickly adsorbed, due to a larger specific surface area and a high-void structure of the nano titanium dioxide photocatalyst, more pollutant molecules can be adsorbed, and degradation effect of the phenolic pollutants in the wastewater can be improved.

A discrete time filter, DTF, is described that comprises a summing node; N parallel branches, each branch having a set of input unit sampling capacitances where each unit sampling capacitance is independently selectively coupleable to the summing node; and an output capacitance connected to the summing node. The output capacitance has a value equal to a sum of the sampling capacitances that are to be selectively connected to the summing node; and the discrete time filter further comprises an inductance connected between the summing node and the output capacitance.

The present invention provides an electromechanical transducer which can prevent light from being incident on a receiving face, without deteriorating mechanical characteristics of a vibration film. The electromechanical transducer has at least one cell 2 in which the vibration film 7 containing one electrode 8 out of two electrodes 3 and 8 that are provided so as to interpose a space 5 therebetween is vibratably supported. The electromechanical transducer has a stress relaxation layer 9 formed on the vibration film 7, which has an acoustic impedance matching that of the vibration film 7, and has a light reflection layer 6 formed on the stress relaxation layer 9.

The invention discloses a Si-C-N composite negative pole material and a preparation method thereof and belongs to the field of lithium ion battery negative pole materials. The preparation method comprises the following steps of heating a mixture of a Si source and an N source to a temperature of 600-1000 DEG C at a heating rate of 0.5-10 DEG C / min in an Ar atmosphere, carrying out sintering at a temperature of 600-1000 DEG C for 3-15h, carrying out cooling to a room temperature to obtain an N-doped Si-based material, mixing the N-doped Si-based material and graphite to obtain a uniform mixture, heating the mixture of the N-doped Si-based material and graphite to a temperature of 500-900 DEG C at a heating rate of 0.5-10 DEG C / min in an N atmosphere, carrying out sintering at a temperature of 500-900 DEG C for 1-10h, and carrying out cooling to a room temperature to obtain the Si-C-N composite negative pole material. Through use of N in the Si material, Si material bandwidth is reduced and conductivity is improved. Through coating of the N-doped Si-based material with graphite, volume effects of the Si material is effectively buffered. The Si-C-N composite negative pole material has excellent multiplying power performances and cycle stability.

The invention belongs to the field of microcrystalline materials, and in particular relates to microcrystalline material MgCaO powder as well as a preparation method and an application thereof. The microcrystalline material MgCaO powder is characterized in that the specific gravity ratio of Mg, Ca and O in the MgCaO powder is shown as xMg(1-x)CaxO, wherein x is greater than or equal to 0.04 and less than or equal to 0.3; the MgCaO powder is formed by sintering CaO powder and MgO powder. A microcrystalline material is formed after the MgCaO powder is dissolved in a solvent. When the microcrystalline material containing the MgCaO powder is applied into a plasma panel, the low energy band width is maintained while the stable state of environmental gases is kept. The preparation method is low in cost, simple and easy to operate.

A filter includes a series arm resonator, a first parallel arm resonance circuit, and a second parallel arm resonance circuit. The first parallel arm resonance circuit includes: a first parallel arm resonator connected to a first node; a first capacitor and a first switch connected together in parallel and connected in series with the first parallel arm resonator; and a first inductor provided on a path connecting the node and ground to each other via the first switch. The second parallel arm resonance circuit includes: a second parallel arm resonator connected to a second node; a second capacitor and a second switch connected together in parallel and connected in series with the second parallel arm resonator; and a second inductor provided on a path connecting the second node and ground to each other via the second switch. The first and second inductor have different inductance values.

A scan-type display device control circuit is suitable for receiving successive frame data and driving a light-emitting diode (LED) display device accordingly. The scan-type display device control circuit includes a ping-pong buffer, a data storage controller, a line scan controller, a display buffer, and a scrambled pulse width modulation (PMW) signal generating device. The scan-type display device control circuit can utilize frame data circularly and repeatedly, so as to prevent a great mass of data from being transmitted repeatedly. Therefore, a band width for inputting data can be reduced significantly. Furthermore, the scrambled PMW signal generating device can scramble a PMW signal with a long period into a plurality of scrambled PMW signals with a short period. Therefore, the refresh rate can be efficiently enhanced without changing the band width for inputting data.

A magnetic head-positioning servo system is provided to accurately test a magnetic disk with a track written in advance, by providing two fine actuators. The second fine actuator, to which a magnetic head is attached, is mounted on the first fine actuator. The second fine actuator has a larger generating displacement than a generating displacement of the first fine actuator, and lets the magnetic disk to follow the eccentricity of the track. In this way, the positioning accuracy can be increased.