38results about How to "Performance loss" patented technology

A turbine engine component, particularly an aerofoil, including a body is provided. The turbine engine component includes a first surface exposed to a working fluid of high temperatures during operation, a second surface including a depression, the depression is exposed to a cooling fluid during operation and oriented such that, starting from the second surface, the depression deepens in the direction of a back face of the first surface. Furthermore the body includes a body portion between the back face and the first surface. The depression is defined such that a diameter of the depression decreases from the second surface in direction of the back face.

The invention discloses a positive electrode current collector and a preparation method and an application thereof. The positive electrode current collector is of a multilayered structure and comprises a plastic thin film, wherein the upper and lower surfaces of the plastic thin film are coated with a bonding force enhancement layer, an aluminum metal coating layer and an anti-oxidization layer in sequence. The preparation method comprises the steps of coating the bonding force enhancement layer, the aluminum metal coating layer and the anti-oxidization layer through an evaporation film-coating process in sequence. The application of the positive electrode current collector mainly refers to an application in a lithium ion battery. By virtue of the positive electrode current collector, light weight of the battery can be realized, energy density can be improved, the aluminum coating layer does not fall off easily, and easy oxidization can be avoided.

The invention provides a three-dimensional composite current collector and a preparation method thereof. The three-dimensional composite current collector provided by the invention comprises a copper foil base layer and a lithium battery negative electrode lithium-philic material coating coated on the copper foil base layer, wherein the lithium battery negative electrode lithium-philic material coating comprises a plurality of micron-sized three-dimensional spherical structures, and the lithium battery negative electrode lithium-philic material is composed of a carbon material, a lithium-philic metal oxide, a binder and a lithium salt. The preparation method comprises the following steps: firstly, preparing lithium battery negative electrode lithium-philic material slurry, then coating a copper foil base layer with the slurry to form a lithium battery negative electrode lithium-philic material coating, and preparing the lithium battery negative electrode three-dimensional composite current collector. According to the lithium battery negative electrode lithium-philic material, a copper foil is coated with a composite coating with a micron-sized three-dimensional spherical structure, so that the current density of a lithium metal negative electrode can be effectively reduced, the generation of lithium dendrites is effectively relieved and reduced, and the cycle performance and the safety performance of a lithium metal battery are improved.

The invention provides a solid state hard disk. The solid state hard disk comprises a main control chip, a group of NAND chips and an MRAM, wherein the NAND chips are used for storing data and are connected with the main control chip; the MRAM is connected with the main control chip; and the MRAM comprises a read/write cache. According to the solid state hard disk and a physical address-using reading/writing method provided by the invention, the MRAM comprises the read/write cache, so that the read/write performance can be ensured; a DDR DRAM is not used, and expensive and large-volume outage protection equipment is not needed, so that the cost and power consumption of the solid state hard disk are reduced; by using a host file system to process a logic address and physical address comparison list, the whole performance of the system is improved without loss; and the random read/write performance is not sacrificed and a lot of internal memory in the host is consumed, so that the scheme is more suitable for servers.

The invention provides a convolution neural network model computing device and computing method. The computing device comprises a physically non-clonable module for generating a response r' accordingto a predetermined excitation c'; s multiplication-accumulation calculation module configured to perform a multiplication and accumulation calculation of the corresponding fuzzy weight values w'0 to w' i and the corresponding input data of the trained convolution neural network model based on the response r' of the physically non-clonable module, and obtaining the results of multiplication and accumulation, wherein the fuzzy weight value is not equal to at least one of the original weight values w0 to wi corresponding to the trained convolution neural network model, and the obtained multiplication and accumulation calculation result is the same as the original weight value of the trained convolution neural network model and the multiplication and accumulation calculation result of the corresponding input data. The computing device and the computing method of the invention can carry out intellectual property protection for the CNN model itself and have low overhead.

The invention discloses a paper-based composite structure and a battery. The paper-based composite structure comprises a paper substrate, wherein the upper surface and the lower surface of the paper substrate are respectively and sequentially plated with an adhesion enhancing layer and a metal coating. The paper-based composite structure provided by the invention not only can realize the light weight of the battery and improve the energy density, but also can prevent the metal coating from falling off easily, and can realize low percentage of elongation under the same compaction density.

A bandwidth configuration method includes: A terminal acquires that a narrow bandwidth mode is used at a network side by a downlink transmission signal and/or an uplink transmission signal; and the terminal configures a receiving bandwidth and/or a transmitting bandwidth, where the receiving bandwidth and/or the transmitting bandwidth corresponds to the narrow bandwidth mode at the network side. The terminal side can acquire whether the network side uses the narrow bandwidth technology, and automatically adjust a bandwidth of a corresponding channel at the terminal side when the network side uses the narrow bandwidth technology, so that intra-system performance loss and inter-system interference that are caused by different bandwidth modes between the terminal side and the network side are avoided, thus improving performance of a communication system.

A method of performing anisotropic texture mip-mapping. The method includes determining a region of support for a set of target pixels of the image to be textured, and mapping the region of support to an area in texture map that is generally elliptical. For each axis of the ellipse the number of samples is determined and a filter function is performed on those samples to find the final color value. For four texels, the filter function is a weighted sum of the color values of each texel, where the weights are determined based on the fraction of the Level of Detail (LOD) and the fraction of the U or V coordinate.

A memory access technique is provided that may be used in WLAN (Wireless Local Area Network) communication devices. An on-chip memory has multiple memory circuits forming individually addressable memory segments. An arbitration unit arbitrates between multiple requesters, each requesting access to the on-chip memory. The requesters are on-chip circuits and/or external devices. The arbitration unit determines a memory circuit to be accessed for each request that is received from a requester. The determination may be based on a software configurable arbitration scheme. The memory segments may form a bank of single-port SRAM (Static Random Access Memory) devices.

The invention relates to a low-detonation-velocity explosive for explosive welding and a preparation technique thereof. The low-detonation-velocity explosive for explosive welding is mainly prepared from 60-83 wt% of third-grade coal mine allowable powder emulsion explosive, 10-25 wt% of talcum powder, 5-10 wt% of silicon aluminum powder and 3-5 wt% of wheat straw powder. The preparation technique comprises the following steps: respectively weighing the following raw materials in percentage by mass: third-grade coal mine allowable powder emulsion explosive, talcum powder, silicon aluminum powder and wheat straw powder; and drying the talcum powder, silicon aluminum powder and wheat straw powder at 80-95 DEG C until the water content is not higher than 0.5 wt%, uniformly mixing, adding the wheat straw powder to obtain the low-detonation-velocity explosive for explosive welding, and packaging for later use. The low-detonation-velocity explosive for explosive welding is easy to produce, and has the advantage of stable performance. The low-detonation-velocity explosive for explosive welding satisfies the requirement that the explosive welding explosive brisance is 9-11mm, the detonation velocity is 2500-2750 m/s, thereby ensuring the explosive welding effect.

The invention provides an unlicensed frequency band heterogeneous network embedded friendly coexistence method and system based on spatial multiplexing. The method comprises the steps that a multi-antenna WiFi access point is connected with a plurality of WiFi loads; channel states of the WiFi loads are detected; the occupation of spatial flow by the WiFi loads with relatively poor channel qualityis forcedly disabled; and optimal heterogeneous network loads are searched for to be accessed, and idle spatial resources are occupied: a search process of an optimal heterogeneous network load set as shown in the description is executed. The method and the system are based on the spatial multiplexing technology, so that the performance of WiFi equipment/a user on an unlicensed frequency band isnot obviously lost or even effectively improved, and the friendly coexistence and the win-win effect of the heterogeneous network are realized. Compared with an existing coexistence method, the heterogeneous network coexistence method provided by the invention can effectively improve the performance of the heterogeneous network, and fair distribution of MIMO spatial flow is realized.

The invention discloses a method and apparatus for selecting cells from a plurality of cells to perform intermittent transmission. The method comprises the following steps that: interference information of each cell from the plurality of cells, and at least one kind of data selected from the number of users of predetermined types in each cell and the historical intermittent transmission frequency of each cell are acquired, wherein the interference information of each cell indicates the degree of interferences which are exerted on the other cells in the plurality of cells by the cell; and at least one cell is selected from the plurality of cells to perform intermittent transmission based on the interference information of each cell and at least one kind of data selected from the number of the users of predetermined types in each cell and the historical intermittent transmission frequency of each cell. With the method and apparatus of the invention adopted, at least one cell can be properly selected from the plurality of cells to perform intermittent transmission, and therefore, interferences between the cells can be decreased, and negative impact on the performance of a whole communication system can be avoided, and performance deterioration which is caused by a situation in which one or many cells are selected frequently to perform intermittent transmission can be avoided.

The invention relates to a special polyurethane self-adhesive double-core wire and a manufacturing process thereof. At present, instruments and transmission wires for detection are affected by severemarine environment, and a corrosion phenomenon often occurs in a short time. And the development of the deep sea detection technology in China is hindered to a certain extent. The self-adhesive double-core wire comprises two parallel conductors, an insulating layer is arranged outside each conductor, and each insulating layer is sequentially provided with a polyurethane insulating layer and a polyamide self-adhesive layer from inside to outside. And a lubricating oil layer is arranged outside the polyamide self-adhesive layer. The wire has good salt resistance, and electrical performance reduction caused by seawater corrosion is prevented.