65results about How to "Suitable for transmission" patented technology

A method for receiving-transmitting ground mobile multimedia broadcast based on free charge DAB includes configuring parameter according multimedia service to carry out source and channel coding and embedding coded service data in master service channel MSC as well as carrying out channel coding to form T-MMB transmission frame being sent out at sending end, synchronizing and decoding received signal and picking up configured parameter as well as carrying out decoding on source and channel at receiving end.

The invention discloses a blood sugar testing system, which comprises a blood sugar testing module and a communication module, wherein the blood sugar testing module is used for testing blood sugar, and the communication module is used for sending blood sugar value health information tested by the blood sugar testing module to a specified server in a wireless communication mode. An acquiring and managing process of the health information is simplified by utilizing the blood sugar testing system which is convenient for users to use.

The invention relates to an Internet of Things cloud access method and system based on Web Service. The method comprises the following steps of: 1, sending registration request information to a cloud receiving end through an Internet of Things emitting client; 2, feeding digital certificate information back to the Internet of Things emitting client by the cloud receiving end after receiving the registration request information; 3, acquiring a service resource identifier of the cloud receiving end through the Internet of Things emitting client; and 4, bidirectionally sending data information to the cloud receiving end at fixed period by the Internet of Things emitting client according to the service resource identifier and the digital certificate information. According to the Internet of Things cloud access method and system based on the Web Service, both the generality and the flexibility are combined, thus the problem of the conventional cloud access system can be solved well, the access equipment of various types can be compatible, and the data can be safely and reliably transmitted to a cloud center through the Internet of Things emitting client; an HTTP / HTTPS (Hyper Text Transport Protocol / Hypertext Transfer Protocol Secure) protocol is adopted, therefore, the possibility of error interception is avoided; and with the adoption of a self-defined JSON (JavaScript Object Notation) message format providing envelope mechanism, the industrial data models of various types are supported.

The invention discloses a generation method of quasi-cyclic low-density parity check codes, and belongs to the technical field of digital information. The method comprises the following steps: selecting QC-LDPC original codes; cutting a check matrix of the QC-LDPC original codes; extending the cut matrix to obtain the check matrix of QC-LDPC new codes; and computing the generated matrix of the QC-LDPC new codes according to the check matrix. The method can help obtain the QC-LDPC new codes with specific code rate and specific code length by selecting the suitable QC-LDPC original codes, cutting and extending the original codes according to the code length and the code rate of the QC-LDPC new codes, which is realized simply and quickly; and a coded signal frame length is more suitable for data transmission while coding in a TDS-OFDM system.

The invention provides a real-time on-line control method for a miscellaneous nonlinear system. The method is characterized by comprising the following steps of: a, transmitting the current observation state information of a network controlled object to a first controller, wherein the first controller is used for providing real-time on-line control for the network controlled object to make the network controlled object asymptotically stabilized; b, acquiring control output quantity information at the current moment by using the first controller according to the current observation state information; and c, feeding the control output quantity information back to the network controlled object, wherein the network controlled object is the miscellaneous nonlinear system. The aim of asymptotically stabilizing the network controlled object by controlling the miscellaneous nonlinear system through a network is fulfilled by a method for controlling a quantization controller. Particularly, observation information is quantized and then is transmitted, so that the load of the network is lightened.

The invention discloses railway train real time video monitoring controlling system based on WLAN technique. It includes video collecting subsystem used to collect the video, wireless transmission subsystem used to transmit video flow to data receiving processor by wireless access device, monitoring controlling subsystem used to distribute the data flow to each monitoring controlling client-side by over flow media server. Compared with other movable video monitoring controlling device, the invention has clearer image, stronger controllability, can store video-record on train and monitoring controlling center at the same time to convenient for examination. In addition, it can be used in remoter video monitoring controlling for high speed railway train.

The invention discloses an improved-transmission control protocol-friendly multicast congestion control (TFMCC)-protocol-based communication method, which is implemented by the following steps of: every time when a source receives a feedback data packet from a current limiting receiver (CLR), computing end-to-end one-way delay jitter between the source and the CLR according to effective timestamp information in the feedback data packet, and computing a congestion judgment factor by utilizing the delay jitter to judge congestion; and computing a correction factor by utilizing the congestion judgment factor to regulate expected throughput and further regulate a transmission rate. In the method, the transmission rate is regulated by calculating the end-to-end delay jitter between the source and the CLR as a congestion signal, and the end-to-end delay jitter of a TFMCC protocol is effectively controlled, thereby effectively reducing the jitter of the protocol, average end-to-end delay, average end-to-end delay jitter, an average packet loss rate and the like, improving the stability and overall performance of the TFMCC protocol, and making the protocol better serve a multicast protocol and more suitable for the transmission of multimedia services.

The invention discloses a chaotic encryption method based on three-dimensional probability forming, which comprises the following steps: after carrying out serial-parallel change on to-be-encrypted data, mapping the data to each constellation point of three-dimensional probability forming; and masking the constellation diagram of three-dimensional probability forming by utilizing a chaotic model of the Chua's circuit and a Lorentz chaotic model, wherein the Chua's chaotic model and the Lorentz model are respectively adopted for masking according to different distances from each constellation point to an original point, so that the constellation diagram of three-dimensional probability forming is changed into two spherical shells. According to the invention, after spherical three-dimensional probability forming, the transmitting power of the whole system can be greatly reduced, and a new carrier after probability forming has Gaussian energy distribution and is more suitable for transmission of an optical signal in an optical fiber channel; and the Chua's circuit model and the Lorentz model are used for chaotic mapping, compared with a traditional masking mode, the encryption effectis good, and larger key space and higher flexibility are provided.

The invention relates to a polyethyleneimine (PEI) derivative taking an amphipathic chitosan as a cross linker. The molar ratio of the amphipathic chitosan to PEI in the derivative is 1:(1-20), the molecular weight range of the PEI in the raw materials for the preparation of the derivative is 600-70,000, and the molecular weight range of the chitosan in the raw materials for the preparation of the derivative is 1,000-50,000. The invention further provides a preparation method and application of the derivative. The PEI derivative has the advantages that: the PEI derivative is connected with low-molecular-weight PEI through a chemical cross-linking method by using the advantages of the chitosan, and the cytotoxicity arising from high-molecular-weight PEI is greatly lowered under the premise that a certain transfection efficiency is ensured; and particles can be prevented from aggregating in a blood circulation fluid environment due to the introduction of a hydrophilic surface by the chitosan, the stability is improved, the size of a complex formed by deoxyribonucleic acid (DNA) and the PEI derivative connected with the low-molecular-weight PEI can reach nanoscale, and thus, the PEI derivative is suitable for the in-vivo transmission of gene drug.

The invention relates to a gene vector modified by a bifunctional peptide and a preparation method and application thereof. An amino acid sequence of the bifunctional peptide is shown as SEQIDNO.1. The gene vector is formed in a mode that the bifunctional peptide is coupled with polyethyleneimine derivatives. The polyethyleneimine derivatives are polyethyleneimine modified by planck P123. The invention also relates to a preparation method of the gene vector and application of the bifunctional peptide and the gene vector to the gene therapy. The bifunctional peptide provided by the invention has strong targeting and membrane penetrating capability. The gene vector provided by the invention has high cell transfection efficiency and low cytotoxicity. An effective means is provided for the gene therapy of diseases.

An elastic contact-pin contact part is composed of a reed contact ring and a contact pin lead foot, wherein the reed contact ring is in a waist drum shape, the middle is protruded outwards, two ends of the contact pin lead foot are respectively provided with a step, a limiting groove is formed between the two steps, and the reed contact ring is sleeved inside the limiting groove between the steps of the contact pin lead foot. The elastic contact-pin contact part is soft to pull and insert, high in strength, capable of being independently used without protection, and wide in application range.

The invention relates to the technical field of printing, and provides a printing data processing method and system. The method comprises the following steps: applying for a buffer area between every two processing threads, controlling the first processing thread to carry out color processing on a printing data file, storing the processed printing data into a storage unit of the first buffer area through an inlet pointer of the first buffer area, controlling the second processing thread to read the printing data in the storage unit through an outlet pointer of the first buffer area, and meanwhile, controlling the second processing thread to perform the same processing operation as the first processing thread on the read printing data until the (N+1)th processing thread, wherein the (N+1)th processing thread carries out color data processing on the printing data and outputs the processed printing data. The running thread processing mode solves the problem of non-synchronization due to different processing speeds of parallel threads, accelerates the printing data processing speed, and is also suitable for transmission of mass multipage data.

The invention provides a piezoelectric-driven self-charged battery diaphragm and a preparation method thereof. The diaphragm is a PVDF / BCT-BZT piezoelectric composite film which comprises a fibrous piezoelectric material BCT-BZT and a polymer PVDF; BCT-BZT is 0.5(Ba0.7Ca0.3)TiO3-0.5Ba(Ti0.8Zr0.2)O3, and PVDF is polyvinylidene fluoride. The preparation method comprises the steps of preparing the 0.5(Ba0.7Ca0.3)TiO3-0.5Ba(Ti0.8Zr0.2)O3 (for short, BCT-BZT) nano-fiber by adopting an electro-spinning method and regarding the BCT-BZT nano-fiber as a piezoelectric phase to be compounded in the film so as to obtain a PVDF / BCT-BZT nanometer composite film with a porous structure. According to the preparation method, the fibrous lead-free piezoelectric material BCT-BZT and a traditional SCPC diaphragm material PVDF are compounded and modified, so that the composite diaphragm has more holes and higher piezoelectric response potential than the pure PVDF film, and accordingly, the piezoelectric, self-charging and electrochemical performances of the SCPC are improved remarkably.

The invention relates to a measuring device (1) for measuring an electrical current, comprising a light source (5) for generating a polarised primary light signal for feeding into a Faraday sensor unit (2), and comprising a detector (6) for detecting a secondary light signal provided by the Faraday sensor unit (2) and polarisation-altered in relation to the primary light signal. The invention is characterised by an optical-electrical compensation element (8, 9, 10), by means of which the polarisation alteration of the secondary light signal can be compensated via an opposite polarisation alteration, and a measurement signal, according to the opposite polarisation alteration, for the electrical current can be deduced. The invention also relates to a method for measuring an electrical current by means of the measuring device (1).

The invention discloses spherical porous lithium manganate and a preparation method and application thereof. The method comprises the following steps that 1, a manganese source and an organic ligand are added into a solvent according to a set ratio, and a mixture is mixed evenly for reaction to obtain an organic compound of manganese, wherein the organic ligand is one or a mixture of at least twoof trimesic acid, trimellitic acid, terephthalic acid, isophthalic acid, benzoic acid, methylimidazole and polyvinylpyrrolidone; 2, after the separated dried organic compound of the manganese and a lithium source are mixed evenly, calcination is conducted to obtain the spherical porous lithium manganate. A preparation technology of the lithium manganate is mild, environmentally friendly, controllable and suitable for large-scale production, and raw material kinds of the manganese source and the lithium source are numerous.

The invention relates to a bone tissue engineering composite porous scaffold material and a preparation method thereof, and belongs to the application field of biomedical material technology. The porous material comprises the components: 1.4-5.0 wt% of konjac glucomannan, 5.0-8.0 wt% of nano hydroxyapatite, and 1.0-2.0 wt% of chitosan; the porosity is 70-92 wt%, and the compressive strength is 0.14 MPa-0.75 MPa. A mixed sol is prepared by mechanical mixing of the three components in an alkaline environment, and then is subjected to curing, alkali removal, freeze drying and other process treatment to obtain a konjac glucomannan / nano hydroxyapatite / chitosan composite bone tissue engineering porous scaffold. The preparation method of the scaffold has the advantages of simple preparation process, simple use equipment, short product finishing cycle, lower cost and the like; and cell and animal experiments show that the konjac glucomannan / nano hydroxyapatite / chitosan composite bone tissue engineering porous scaffold prepared by the method has quite good tissue compatibility, good cell proliferation and obvious osteogenesis effect, is expected to realize industrial expansion production, and achieves clinical application.

The invention discloses a data package format method and system suitable for transmission. The method comprises: obtaining a multimedia file encoded in a first encoding format; demultiplexing the multimedia file, obtaining each frame of data encoded in the first encoding format, and displaying a time stamp; packaging code stream encoded in the first encoding format; decoding each frame of data encoded in the first encoding format to obtain YUV data; encoding the YUV data in a second encoding format to obtain each frame of data encoded in the second encoding format, and forming code stream encoded in the second encoding format via the multiple frames of data. By adopting the data package format method disclosed by the invention, the code stream retains all the information necessary for decoding and retains the time stamp for audio / video synchronization; the package format is simplified, so a decoding end is convenient to separate files; and the code stream is saved, and the header information is particularly simplified, thereby being more suitable for network transmission.

The invention relates to the field of hydrogen conveying pipelines, in particular to a composite pipeline device for hydrogen conveying and capable of monitoring hydrogen leakage in a full-pipeline mode in real time and a method for monitoring hydrogen leakage in the full-pipeline mode. The novel composite pipeline structure for hydrogen conveying comprises a plastic pipeline, a polyurethane foaming layer and a plastic protection layer, and the plastic pipeline, the polyurethane foaming layer and the plastic protection layer are sequentially arranged from inside to outside. The invention also provides a monitoring system formed by arranging sensors at specific positions by using the composite pipeline device, and provides a monitoring method for a real-time hydrogen conveying pipeline, so that real-time full-pipeline monitoring of the hydrogen conveying pipeline is realized. The composite pipeline for hydrogen conveying can effectively prevent hydrogen leakage and diffusion, reduces hydrogen conveying loss caused by leakage, slows down the situation that hydrogen leaks into air, improves the safety coefficient, avoids the situation that a sensor cannot detect the situation due to the fact that hydrogen escape is too fast and the hydrogen concentration is too low, and improves the safety coefficient. And effective monitoring of the whole pipeline is realized.

The invention discloses a slow light adjustable time delayer for a wideband signal based on a coupling cavity and vertical cavity surface emitting laser. The method adopted by the invention is realized in such a way that a coupling cavity formed by coupling an edge cavity and an edgeless cavity is constructed by changing a structure of a DBR (Distributed Bragg Reflector) at one side of the coupling cavity and vertical cavity surface emitting laser (CC-VCSEL) and can be used for effectively broadening delay bandwidth of the device. According to the technical scheme of the invention, the slow light time delay of the wideband signal can be effectively adjusted by adjusting bias current of the CC-VCSEL and the light power or wavelength of an input signal. The slow light adjustable time delayer disclosed by the invention has the advantages of work under the condition of room temperature, simpleness in operation, easiness in integration and the like.

In a connector (1) including an insulator (2) and first and second signal contacts (3,4) held by the insulator, each of the first and the second signal contacts includes a fixed portion (3a,4a) fixed to the insulator, a contacting portion (3b,4b) connected to one end of the fixed portion and extending in a first direction (A1), a bent portion (3c,4c) connected to the other end of the fixed portion, a first intermediate portion (3d,4d) extending from the bent portion in the first direction, a second intermediate portion (3e,4e) extending from the first intermediate portion in a second direction (A2), and a terminal portion (3f,4f) extending from the second intermediate portion in the first direction. The first intermediate portions are placed at positions which are different from each other in the second direction. The second intermediate portions are different from each other in the first direction. The bent portions are shaped to make the first and the second signal contacts be substantially equal in total length to each other.

The invention relates to the technical field of new energy materials, in particular to a preparation method of a fusiform iron oxide single crystal nano material. The method comprises the following steps: mixing an iron salt solution with a NaH2PO4 solution to obtain a mixed solution; carrying out hydrothermal reaction on the obtained mixed solution; performing centrifugal separation of the obtained product, and obtaining a fusiform iron oxide single crystal nano material after drying. The monodisperse fusiform iron oxide nano single crystals can be prepared in batches by adopting a simple method, and the material has a single crystal structure, is suitable for electron transmission, reduces electron dissipation in the transmission process, can be prepared in batches, and is high in yieldand stable in material finished product.

The invention discloses a thermoplastic polyurethane elastomer drying and conveying integrated device which comprises a bracket and a spiral conveyor, wherein the vertical surface of the bracket is provided with a control panel; the interior of the control panel is fixedly connected with a circuit mainboard; the middle of the circuit mainboard is provided with a controller; one side of the horizontal surface of the bracket is fixedly connected with a motor base, and the motor base is in bolt connection with a motor; one end of the motor is connected with a revolution speed transducer. The thermoplastic polyurethane elastomer drying and conveying integrated device is reasonable in design and is quite applicable to drying and conveying thermoplastic polyurethane elastomers; by virtue of arranging a first blower and a heat conducting net, and in combination with a heater, materials from a discharge hopper can be further effectively dried; by virtue of arranging a second blower, air flow in the spiral conveyor can be increased so as to dry products; by virtue of arranging helical blades and a rotating shaft, and in combination with resistance wires, the product drying area can be increased, the drying degree can be effectively improved, and the thermoplastic polyurethane elastomer drying and conveying integrated deiced is suitable for extensive promotion.

The invention discloses a voice coding and decoding device and method used for a GSM-R communication system. The voice coding and decoding device comprises a data decomposition module used for decomposing 240 16-bit PCM digital voice data, outputting 20 bytes if the data are coded at a rate of 5.3 Kbps, and outputting 24 bytes if the data are coded at the rate of 6.3 Kbps; a packaging module used for packaging and sending the data which are transmitted for outputting the 20 bytes when the data are coded at the rate of 5.3 Kbps or outputting the 24 bytes when the data are coded at the rate of 6.3 Kbps based on a data transmission requirement; a decoding module used for decoding the received 20 / 24 bytes data into 240 16-bit PCM digital voice data; and a playing module used for playing the coded data which are decoded into the PCM format digital voice by using a voice chip. The voice coding and decoding device and method used for the GSM-R communication system have an advantage of high call quality in CIR communication.

The invention provides an interactive media response security system for applying a public secret key system and a digital certificate technology to telephone trades so as to protect the confidentiality and the integrity of information, and is in particular suitable for point-to-point information transmission. The invention especially provides a security chip directly supporting the interactive media response (IMR) security system.

The invention discloses an improved-transmission control protocol-friendly multicast congestion control (TFMCC)-protocol-based communication method, which is implemented by the following steps of: every time when a source receives a feedback data packet from a current limiting receiver (CLR), computing end-to-end one-way delay jitter between the source and the CLR according to effective timestamp information in the feedback data packet, and computing a congestion judgment factor by utilizing the delay jitter to judge congestion; and computing a correction factor by utilizing the congestion judgment factor to regulate expected throughput and further regulate a transmission rate. In the method, the transmission rate is regulated by calculating the end-to-end delay jitter between the source and the CLR as a congestion signal, and the end-to-end delay jitter of a TFMCC protocol is effectively controlled, thereby effectively reducing the jitter of the protocol, average end-to-end delay, average end-to-end delay jitter, an average packet loss rate and the like, improving the stability and overall performance of the TFMCC protocol, and making the protocol better serve a multicast protocol and more suitable for the transmission of multimedia services.

The invention discloses a voice message encryption method based on a time axis. The voice message encryption method based on the time axis is characterized in that the voice message encryption method comprises the following steps: the voice message encryption method consists of two parts including a decomposer and a player, wherein the decomposer is mastered by an audio file sender, and the player can be published on an Internet for all people to download and master the player; the decomposer is used for processing one section of audio file, firstly, the decomposer extracts the time axis of the whole file, and then the decomposer divides time zone degrees according to complexity; the decomposer segments audio sections by an audio clipping technology and then disrupts the order to re-splice the audio sections, so that the length of the audio file is constant, and meanwhile, the disorderly arranged audio sections can be marked with new audio signs; and when a receiver obtains the processed audio file, the receiver can obtain a time axis calibration file of the sender through identity verification or payment and import the time axis calibration file of the sender into the player, the player sorts the audio file again according to the calibration file so as to obtain an original file, and music or a message can be normally heard. The voice message encryption method based on the time axis is convenient and simple for an independent audio file, and is suitable for the pirate prevention of legal copy music records and the transmission of confidential audio messages.

The invention relates to a PEGylated Fe3+ / PEI genetic vector based on functional peptide R9 modification and a preparation method and application of the PEGylated Fe3+ / PEI genetic vector. The genetic vector contains polyethylene glycol modified Fe3+ / polyethyleneimine and a conjugate formed by functional peptides R9. The PEGylated Fe3+ / PEI genetic vector based on functional peptide R9 modification has the advantages that metal ions Fe3 react with PEI at first, PEG modification is carried out to form PEGylated Fe3+ / PEI, then the functional peptide R9 which has ability of improving nuclear delivery and is targeted at alpha v beta 3 is synthesized, R9 is coupled with a PEG-Fe3+ / PEI by a crosslinking technology, and therefore, a novel virogene-free vector system PEG-Fe3 + / PEI is established. On the basis of reducing PEI cytotoxicity, in-vivo targeting property and nuclear delivery ability are improved, then the transfection efficiency of the vector in vivo is improved, and an effective way is searched for final application of gene therapy on clinical treatment.

In a connector (1) including an insulator (2) and first and second signal contacts (3,4) held by the insulator, each of the first and the second signal contacts includes a fixed portion (3a,4a) fixed to the insulator, a contacting portion (3b,4b) connected to one end of the fixed portion and extending in a first direction (A1), a bent portion (3c,4c) connected to the other end of the fixed portion, a first intermediate portion (3d,4d) extending from the bent portion in the first direction, a second intermediate portion (3e,4e) extending from the first intermediate portion in a second direction (A2), and a terminal portion (3f,4f) extending from the second intermediate portion in the first direction. The first intermediate portions are placed at positions which are different from each other in the second direction. The second intermediate portions are different from each other in the first direction. The bent portions are shaped to make the first and the second signal contacts be substantially equal in total length to each other.

The invention discloses a polarization-state-controlled multimode-interference optical switch. The polarization-state-controlled multimode-interference optical switch comprises a planar optical wave and optical path chip, a light source, a polarization controller and an input fiber array. The planar optical wave and optical path chip comprises a silicon substrate, a silica buffer layer, waveguides and a covering layer. Cracks are formed in the silica buffer layer. The waveguides comprise an input-stage single-mode waveguide, an intermediate-stage multimode waveguide and an output-stage single-mode waveguide. The light source is connected with the optical input end of the polarization controller, and the optical output end of the polarization controller is connected with the input end of the input fiber array. The switch-on / off state of the multimode-interference optical switch is adjustable, and the multimode-interference optical switch has the advantages of thermal stabilization, low nonlinearity, low transmission loss, wide operation bandwidth and high integration and being capable of being efficiently coupled with a single-mode fiber, low in price, simple in structure, and the like. Meanwhile, the invention further discloses a manufacturing method of the polarization-state-controlled multimode-interference optical switch. The manufacturing method is simple, low in cost and capable of manufacturing the optical switch in batches.