15 results about "Transmission performance" patented technology

The invention discloses a method for resource allocation of a space division multiplexing spectral flexible optical network with minimum crosstalk. The method comprises the following steps of initializing the space division multiplexing spectral flexible optical network, generating a group of service request sets, computing a shortest working path of each service request, finding available candidate spectrum blocks in different fiber cores, computing crosstalk values of the candidate spectrum blocks on an optical fiber link, selecting the spectrum block with the minimum crosstalk value to serve as a spectrum resource reserved for the service request, and guaranteeing minimization of the crosstalk value of the spectrum resource allocated to the service request. According to the method, a problem of cross crosstalk in the space division multiplexing spectral flexible optical network is solved, so that the service quality of the space division multiplexing spectral flexible optical network is guaranteed, and the transmission performance of the service request in the optical network is improved.

The invention discloses a Bi Cu 1-x SeO-based oxide thermoelectric ceramic material and a preparation method thereof, wherein x is more than or equal to 0 but less than or equal to 0.1; the preparation method comprises the following steps of: (1) according to the stoichiometric proportion in Bi Cu 1-x SeO, weighing Bi, Cu, Se and Bi2O3, mixing to obtain mixture; (2) grinding the obtained mixture to obtain precursor powder; and (3) carrying out spark plasma sintering on the precursor powder to obtain the Bi Cu 1-x SeO-based oxide thermoelectric ceramic material. The Bi Cu 1-x SeO-based oxide thermoelectric ceramic material not only has higher electrical property, but also maintains lower heat transmission performance and has good thermoelectric transmission performance by introducing Cu defect, thus being a novel high-temperature oxide thermoelectric ceramic material with a wide application prospect. Compared with the common solid phase sintering, the method is short in reaction time, low in sintering temperature and simpler in synthesis process, and can be used for further synthesizing a Bi Cu 1-x SeO-based ceramic sample.

The embodiment of the invention provides an information transmission method and device. The information transmission method comprises the steps of receiving a first reference signal and/or a second reference signal by UE (User Equipment); determining a transmission delay difference between the first reference signal and the second reference signal based on the first reference signal and the secondreference signal by the UE; or determining a second transmission delay based on the second reference signal and/or determining a first transmission delay based on the first reference signal. Throughthe method, transmission delays of different wireless network devices are enabled to be measurable, and the transmission performance is further improved.

The invention relates to a composite underwater sound transmission rubber material and a preparation method thereof. A component A is prepared through steps of plasticating natural rubber, then adding into an internal mixer for mixing, adding metallic oxide, inorganic filler, active agent and accelerator for mixing, and discharging sheets by an open mill and testing; a component B is prepared through steps of plasticating chloroprene rubber, then adding into the internal mixer for mixing, then sequentially adding stearic acid, antiager, carbon black, inorganic filler and softener for mixing, adding sulphur for mixing, discharging sheets and cooling down; the composite underwater sound transmission rubber material is prepared through steps of mixing the component A and component B according to proportion of 1:1, packaging into triangle, thinning, discharging sheets, sampling for sulfuration test, and sulfurizing at relatively low temperature. The acoustic impedence of the material and acoustic characteristic impedence of water are well matched, the sound attenuation coefficient of sound wave transmitting in sizing material is low, the material has good hydrolytic resistance and silicone oil resistance; the material can be stored for long time, is safe to operate, has high underwater sound transmission performance, and can be sulfurized at low temperature so that the contradiction between low temperature sulfurization and normal temperature storage is relieved.

The embodiment of the invention discloses a path planning method, a path planning apparatus, a path planning device and a storage medium. The method comprises the following steps: determining a sourcenode and a target node in a target network; according to a network parameter of the target network, calculating dynamic recursion values of a plurality of paths from the source node to the target node, wherein the network parameter at least comprises a bandwidth of the node in the target network; and according to the dynamic recursion values, determining an optimal path from the source node to the target node from the plurality of paths. According to the path planning method, the path planning apparatus, the path planning device and the storage medium provided by the embodiment of the invention, a bandwidth factor is considered in path planning, and thus, network congestion and network data transmission performance degradation can be avoided.

The invention relates to a multi-quantum well photovoltaic battery based on a nanometer graphite electron transmission layer, and a preparation method thereof. The battery comprises a front electrode, an anti-reflection layer, N-type silicon, P-type silicon and a back electrode, wherein a composite layer composed of graphite and semiconductor quantum dots is arranged between the anti-reflection layer and the N-type silicon. Compared to the prior art, the method is characterized in such a way that a sol method is employed, first of all, a semiconductor quantum dot colloid is prepared; under the effect of a surfactant, the graphite is uniformly dispersed to the colloid, and then, by taking the graphite as a crystal growth liquid, a uniform an ordered electron transmission layer and a semiconductor quantum dot layer are grown on the surface of a crystal silicon chip in a deposition mode. According to the invention, by use of a quantum dot impact ionization effect and a namometer effect and excellent electron separate transmission performance of nanometer graphite, the minority carrier life and the quantum efficiency of the photovoltaic battery are improved, and the nanometer graphite can improve separation and collection of electrons by the silicon solar battery, improves photoelectric currents and accordingly improve the conversion efficiency of the silicon solar battery.

The invention discloses a video quality evaluating method and device. The method includes acquiring wireless channel measurement data and application layer transmission performance statistics data during a video data transmission process; determining the difference between the wireless channel measurement data and a first evaluation reference and the difference between the application layer transmission performance statistics data and a second evaluation reference; evaluating video quality of the video data according to the determined difference. The invention can provide a technical solution, which is simple in algorithm and easy to implement, for objective video quality evaluation.

The invention belongs to the technical field of a communication accessory and provides a reed space arraying structure of an RJ45 module. The reed space arraying structure comprises eight reeds including a first reed, a second reed, a third reed, a fourth reed, a fifth reed, a sixth reed, a seventh reed and an eighth reed, which are arrayed in parallel to form a space structure; and the eight reeds are divided into upper and lower rows. The reed space arraying structure disclosed by the invention has the advantages that an arraying space structure is more scientific so that the electric matching performance of an RJ45 module socket is more reasonable and crosstalk disturbance is reduced; and therefore, the reed space arraying structure can meet the requirements of a transmission performance of a national standard category 6 or more than category 6, such as a 6A category.

The invention provides a data migration method and device and a PCIE system. The data migration method applied to slave equipment comprises the following steps: configuring a memory space of the slave equipment; establishing mapping between the memory space of the slave equipment and a memory space of host equipment, and forming a first shared memory between the slave equipment and the host equipment, with the first shared memory being at least used for transmitting address information; and mapping the address information of the first shared memory in an outward mapping manner so as to execute data migration from the host equipment to the slave equipment and from the slave equipment to the host equipment. Data migration between the host equipment and the slave equipment is optimized, the CPU occupancy rate of the host equipment is reduced, the expansibility of the whole system is improved, and meanwhile the transmission performance between the host equipment and the slave equipment is improved.

The invention belongs to the technical field of magnetic transmission, and particularly relates to an intelligent test platform and method for a magnetic coupler with adjustable air gap thickness. An output shaft of the variable frequency motor is connected with a permanent magnet disc of the magnetic coupler through a coupler, a rotating speed and torque sensor and a bearing seat; wherein this part is fixedly installed on a movable platform and moves along with the movement of the movable platform, and the movable platform is pushed by the planetary roller lead screw to move in the axial direction. The other variable frequency motor is used as a system load end, is connected with a conductor disc of the magnetic coupler through a coupler, a rotating speed and torque sensor and a bearing seat, and is fixedly mounted on the fixed platform through respective supporting seats. The pushing mechanism controls the movement of the mobile platform to realize air gap adjustment of the magnetic coupler. The laser displacement sensor dynamically measures the air gap thickness. The console adjusts the rotating speed and torque of the variable frequency motor and receives data measured by the sensor through the signal acquisition device, and the transmission performance of the magnetic coupler under different working conditions can be obtained by analyzing and processing the data.

The invention discloses a semiconductor device, a semiconductor structure and a manufacturing method of an interconnection structure, belonging to the technical field of semiconductors. The manufacturing method of the interconnection structure comprises the steps that a barrier layer and a seed layer are sequentially formed on a dielectric layer with a groove, and the barrier layer and the seed layer are attached to the dielectric layer in a conformal mode; nitrogen ions are injected into the seed layer according to a preset angle to form a nitrogen-containing seed layer, and the nitrogen-containing seed layer is located on the top surface of the groove and extends towards the bottom of the groove along the two side walls of the groove; the nitrogen-containing seed layer is removed, a metal layer covering the barrier layer is formed, and the groove is filled with the metal layer; and the metal layer and the barrier layer on the top surface of the groove are removed, and planarization processing is performed on the metal layer in the groove to enable the metal layer in the groove to be flush with the surface of the dielectric layer on the top surface of the groove. According to themanufacturing method disclosed by the invention, cavities can be avoided, yield is improved, and meanwhile, the transmission performance of the interconnection structure and the semiconductor device can be improved.