32results about How to "Capacity control" patented technology

The embodiment of the invention discloses a cache management method and device for a nonvolatile memory device, and relates to the technical field of data processing. According to the cache management method and device for the nonvolatile memory device, frequent replacement of dirty pages is avoided, the service life of the memory device is prolonged, implementation cost is reduced, and the execution efficiency is improved. The cache management method comprises the steps that the relationship between the sum of the capacity of a clean page sub pool and a dirty sub pool and the cache capacity is judged; when the sum of the capacity of the clean page sub pool and the dirty sub pool is larger than or equal to the cache capacity, whether the identification information of a page to be visited is in the clean page history list or in the dirty page history list is judged; when the identification information of the page to be visited is judged to be in the clean page history list, one first adjusting value is added for the clean page sub pool capacity threshold value; when the identification information of the page to be visited is in the dirty page history list, one second adjusting value is subtracted from the clean sub tool threshold value. The cache management method and device for the nonvolatile memory device are mainly applied to the cache management process of nonvolatile memory devices.

The invention provides a lossless information hiding method based on a data difference value, which can achieve high-capacity lossless information hiding in various data (such as image data). The lossless information hiding method based on the data difference value is characterized in that secrete information and a difference value are jointly encoded and then are hidden in data to be transmitted, and a receiving end can completely recover the secrete information and original data. According to the lossless information hiding method based on the data difference value, information hiding is performed on only a half of original image data, and information joint hiding is performed on the other half of original image data; after the receiving end corrects the difference value, the original data can be recovered; therefore, the limitation of the traditional least significant bit data compression method is broken through, difference value coding as the cost facilitates the improvement of lossless information hiding capacity, the lossless hiding capacity of the general data is within 1/16 to 7/16, and the certain anti-compression and anti-noise properties are provided.

The invention provides a cooling system which has a plurality of kinds of compressors capable of being selected and combined freely, and can keep the cooling performance of low temperature showcase and improve energy saving performance of the refrigerator. The cooling system comprises: a refrigeration loop composed by connecting a plurality of low temperature showcases in parallel by refrigerant pipes and cabinet system refrigerators selected and combined freely from the plurality of kinds of compressors; a main controller for setting the low pressure side pressure set value of the cabinet system refrigerators according to the cooling state of the low temperature showcase; and a compressor controller capable of acquiring the control setting needed in the capacity control in the assembling of the compressors in the cabinet system refrigerators, receiving the low pressure side pressure set value from the main controller, and controlling the capacities of the compressors according to the low pressure value corresponding to the low pressure side pressure set value and the control setting.

The invention relates to the technical field of cloth cleaning accessory devices, in particular to a cloth cleaning device for fabric cloth production. The fiber fabric cleaning intensity of the cleaning device is high, and therefore the fiber fabric can be cleaned easily. A working cavity can be observed conveniently, and reliability is improved; when cleaning fluid is guided into a working box, volume is convenient to control, and the practicability is improved; the cloth cleaning device for fabric cloth production further comprises the working box, a cleaning box, a motor, a transmission shaft, cleaning blades, a buffering sleeve, multiple buffering springs, multiple buffering plates, a sliding block, a driving column, a connecting column, bristles, a push plate, a push rod and a piston, wherein a connecting pipe is arranged at the bottom end of the cleaning box in a communicated mode, an observing hole is formed in the top end of the working box in a communicated mode, a transparent baffle is arranged on the observing hole, a sliding hole is formed in the top end of the working box in a front-back communicated mode, the piston is sleeved with a seal sleeve, a transparent plate is arranged on an observing opening, and scales are arranged on the transparent plate.

The invention discloses a circuit board reliability evaluation method. Multiple important reliability tests in circuit board processing technologies are completed on one reliability test circuit boardthrough a single processing technology. The important reliability evaluation includes the material quality test of the base materials of circuit boards and the test of circuit reliability and mechanical performance reliability of processed circuit boards in extreme environments. By using the circuit board reliability evaluation method of the invention, the reliability of products can be scientifically and accurately judged and identified. The circuit board reliability evaluation method has the characteristics of simple operation, reasonable design, capacity control, low manufacturing cost, obvious effect, and the like.

The invention relates to a bacterium collector. The bacterium collector consists of a cup body, a liquid inlet, two breathable covers, a partition plate, a filter membrane and a liquid outlet, wherein the cup body is cylindrical, is made from transparent plastics and is provided with capacity graduation lines, so that the control on the capacity of liquid in the bacterium collector is facilitated; the liquid inlet is located at the top of the cup body, and the lower part of the liquid inlet extends so as to form a dropper; the breathable covers are located at the top of the cup body, air inlets are formed in the breathable covers, air filter layers are arranged inside the breathable covers, clamp plates at the two sides of each air filter layer are provided with breathing grooves, the breathing grooves are of water wave shapes, straight grooves passing through the centers of water waves are formed on the breathing grooves, the breathable covers are connected with top openings of the cup body through threads, the air filter layers in the breathable covers can be replaced through disassembling the breathable covers, and the two breathable covers are uniformly distributed at the two sides of the liquid inlet; the partition plate is located below the filter membrane and is used for supporting the filter membrane, and a liquid flowing groove is formed in the partition plate, so that liquid can smoothly flow through the filter membrane. The bacterium collector has the advantages of good air circulation performance, high filtering rate, simple structure and low cost.

The present invention relates to a prefabricated steel plate shear wall, which includes frame columns 4 and frame beams 5 fixedly connected to each other, a plurality of embedded angle steels 1 and two horizontal edge members 2, and each frame column 4 is at the upper and lower parts Steel column sleeves 3 are fixedly connected; both ends of a horizontal edge member 2 are fixedly connected to two steel column sleeves 3 located on the upper parts of two frame columns 4 through high-strength bolts; the two ends of the other horizontal edge member 2 are respectively It is fixedly connected with two steel column sleeves 3 located at the lower part of the two frame columns 4 through high-strength bolts; each embedded angle steel 1 is obliquely fixed to two horizontal edge members 2 through friction-type high-strength bolts.

The invention discloses a sensing detection device suitable for electrode and sensitive element replacement at constant temperature. The device comprises a casing and an electrode; the electrode is placed in the casing; the top of the casing is provided with a top cover; the electrode comprises an electrode casing, an electrode sleeve, an electrode rod, a rotating cabin seat, a connecting shaft, a sensitive element cabin and an electrode processor; the electrode sleeve is a column, and is vertically arranged inside the electrode casing; the electrode rod is inserted into the electrode sleeve; the rotating cabin seat is arranged at the bottom of the electrode casing; a connecting shaft is connected with the electrode casing and the rotating cabin seat; the sensitive element cabin is fixed on the upper surface of the rotating cabin seat; the connecting shaft is located in the central position of the electrode bottom; and the electrode processor is fixed on the inner wall of the electrode casing. The device provided by the invention can replace different electrodes and sensing elements according to the demand of the user, and can control the temperature according to the process of the reaction; and the device has simple structure and convenient operation.

The invention relates to a multilevel modular converter (10) including a control module (12) for regulating the internal energy stored in the capacitors of the submodules of a half arm of the converter, the control module being capable of keeping the internal energy below an upper limit and/or above a lower limit, by using parameters measured on the DC electrical power supply network (110) and onthe AC electrical power supply network (120) as well as operating power setpoints of the converter.