48 results about "DEFLATE" patented technology

At least one guest system, for example, a virtual machine, is connected to a host system, which includes a system resource such as system machine memory. Each guest system includes a guest operating system (OS). A resource requesting mechanism, preferably a driver, is installed within each guest OS and communicates with a resource scheduler included within the host system. If the host system needs any one the guest systems to relinquish some of the system resource it currently is allocated, then the resource scheduler instructs the driver within that guest system's OS to reserve more of the resource, using the guest OS's own, native resource allocation mechanisms. The driver thus frees this resource for use by the host, since the driver does not itself actually need the requested amount of the resource. The driver in each guest OS thus acts as a hollow “balloon” to “inflate” or “deflate,” that is, reserve more or less of the system resource via the corresponding guest OS. The resource scheduler, however, remains transparent to the guest systems.

A deflate decompressor includes at least one decompressor unit, a memory access controller, a feedback path, and an output buffer unit. The memory access controller is coupled to the decompressor unit via a data path and includes a data buffer to receive the data stream and temporarily buffer a first portion the data stream. The memory access controller transfers fixed length data units of the data stream from the data buffer to the decompressor unit with reference to a memory pointer pointing into the memory buffer. The feedback path couples the decompressor unit to the memory access controller to feed back decrement values to the memory access controller for updating the memory pointer. The decrement values each indicate a number of bits unused by the decompressor unit when decoding the fixed length data units. The output buffer unit buffers a second portion of the data stream after decompression.

The invention provides a software installment method and system for an embedded platform. The method comprises the following steps: decompressing an original android package (apk) installation package to obtain multiple directories and files; packing the directories and files into an uncompressed file of a zip format; and using an algorithm with a compression ratio higher than that of a DEFLATE algorithm, such as a Lempel-Ziv-Markov chain-Algorithm (Lzma) algorithm or Lzma 2 algorithm, to compress the whole file to reduce the size of the installation package. An algorithm decompression library is stored in a lib directory of a new apk installation package; and compared with java codes in the prior art, the algorithm decompression library has faster decompression. According to the invention, under the condition of an online installation mode, the bandwidth of a server can be saved, the waiting time for download is shortened, and user experience is improved.

A built-in pump for an airbed that provides both power inflation and power deflation. The built-in pump utilizes mechanical advantage to open valves for the pump. Separate inflate and deflate valves are utilized. A single direction, centrifugal fan is used to both inflate and deflate the airbed. The fan is activated when either of the valves is actuated, allowing air to flow into or out of the airbed. Separate channels associated with the inflate and deflate valves direct airflow in the appropriate direction.

An inflate/deflate valve of a heavy duty design for use during inflation of inflatable devices such as dunnage bags. Such dunnage bags are used in hostile or rough environments where when deflated the dunnage bags are stacked and compressed into storage drums where the inflate/deflate valves may be crushed or forced against the cuttable or ripable dunnage bag material. As a result, a novel and unique design is provided including a valve body, a spring, an optional washer, a spring retainer, a poppet, poppet seal and an o-ring.

Mechanisms are provided for optimizing file data compressed using deflate mechanisms such as the ZLIB Compressed Data Format Specification and the DEFLATE Compressed Data Format Specification. Deflate mechanisms output different deflate file data depending on specific file data parameters. An optimization tool decompresses the deflate file data and outputs an optimized data stream. When a client application attempts to access the deflate data, the tool deoptimizes the optimized data stream and applies the same deflate algorithm to generate deflate file data. Although the deflate algorithm is applied without using the file data parameters used to generate the original deflate file data, substitute deflate file data is produced.

Systems and methods for indicating conditions for the appropriate inflation and/or deflation of tires are disclosed. Some systems and methods include measuring a variable affecting the internal gas temperature of a tire, calculating by the processor an estimated internal gas temperature of a tire, and determining whether a tire is appropriate to inflate and/or deflate.

The invention relates to a close-contact ultrasonic coupling adaptive device for photoacoustic/thermoacoustic mammary gland imaging detection, and belongs to the technical field of photoacoustic/thermoacoustic imaging. The adaptive device comprises a detection cup, a coupling liquid spray device and an air pressure regulating device, wherein a to-be-detected breast is placed in the detection cup with the shape and the size corresponding to the breast; the coupling liquid spray device is connected with the detection cup, and can spray ultrasonic coupling liquid between the to-be-detected breast and the detection cup; and the air pressure regulating device is connected with the detection cup by an air guide tube, and inhales or deflates between the to-be-detected breast and the detection cup. The adaptive device has the advantages that the adaptive device is good in matching degree, safe, comfortable, easy to replace, and high in automation degree.

Among the various embodiments, objects and features of the present invention may generally be noted an inflation/deflation syringe that enables one-handed operation to inflate a medical device to a given pressure or volume and one-handed operation to deflate said medical device.

The invention relates to a compressed file data embedding method and device capable of resisting longest matching detection and belongs to the technical field of data safety. According to the method, hidden information is embedded through modifying an optimal matched length searching process of a deflate compression algorithm so that whether a compressed file contains the hidden information or not cannot be detected by a longest matching detection manner; the specific process is that a deflate source code longest matching process is modified and embedded data is used for controlling a matched length generation process, so that the matched length containing the embedded data, generated by the algorithm, meets the longest matching condition, and furthermore, whether the compressed file contains the hidden information or not cannot be detected by the longest matching detection manner. Compared with an existing data embedding method based on an LZW compression algorithm, the longest matched length searching process of the compression algorithm is controlled by using the hidden data and the searched longest matching length is not directly modified, so that whether the embedded data exists or not cannot be detected by the longest matching detection method.

Methods, apparatus, systems, and software for implementing self-checking compression. A byte stream is encoded to generate tokens and selected tokens are encoded with hidden parity information in a compressed byte stream that may be stored for later streaming or streamed to a receiver. As the compressed byte stream is received, it is decompressed, with the hidden parity information being decoded and used to detect for errors in the decompressed data, enabling errors to be detected on-the-fly rather than waiting to perform a checksum over an entire received file. In one embodiment the byte stream is encoded using a Lempel-Ziv 77 (LZ77)-based encoding process to generate a sequence of tokens including literals and references, with all or selected references encoded with hidden parity information in a compressed byte stream having a standard format such as DEFLATE or Zstandard. The hidden parity information is encoded such that the compressed byte stream may be decompressed without parity checks using standard DEFLATE or Zstandard decompression schemes. Dictionary coders such as LZ78 and LZW may also be used.

The invention discloses a wireless data transmission method used for an intelligent oil production system, and belongs to the technical field of intelligent oil production systems. The wireless data transmission method is characterized in that production data of an oil well are assembled into a data file through a data file creation module of a lower computer; a data file encryption module encrypts the data file by using a triple DES encryption algorithm; a data file compression module performs lossless compression processing on the data file by using a DEFLATE compression algorithm, and the encrypted and compressed data file is transmitted to a general packet radio service (GPRS) network through an underground GPRS module; a GPRS receiving module of a monitoring center receives the data file; a data file decompression module of an upper computer decompresses the data file by using a corresponding DEFLATE decompression algorithm; a data file decryption module decrypts the data file by using a corresponding triple DES decryption algorithm; a data file parsing module parses the data file to reduce the production data of the oil well. According to the method, the production data of the oil well can be efficiently and safely transmitted to the monitoring center.

The invention relates to the technical field of data transmission in a computer physical information system, and in particular to a physical information system data lossless compression transmission method using a DEFLATE algorithm. A data flow has a large possibility of occurring repetitions when data is transmission in a physical information system. When one repetition occurs, such repetition has locality, that is, if one character string needs to repeat, the character string repeats nearby and cannot be found at any far place, so that a sliding window is to be set; and if the sliding window is 32 KB, such 32 KB is searched in former 32 KB data, and such 32 KB slides forwards along with continuous moving of the code. The physical information system data lossless compression transmission method using the DEFLATE algorithm is provided, which can improve data transmission speed and efficiency by aiming at a problem that the physical information system has a large amount of data to be transmitted.

The invention discloses an intelligent pipe network pressure-superposed non-negative pressure variable frequency water supply device. The intelligent pipe network pressure-superposed non-negative pressure variable frequency water supply device is mainly composed of a flow stabilization compensator, a negative pressure eliminator, a water shortage signal transmitter, a water level sensor, an air compensation tank, a water pump and a control cabinet; two parts including a flow stabilization cavity and a high-pressure energy storage cavity are integrated to the flow stabilization compensator; the air compensation tank is arranged on the outer side of the high-pressure energy storage cavity and is installed on the flow stabilization compensator fixedly; a connecting pipe is arranged at the bottom of the air compensation tank to be communicated with a small flow pipe; and a water inlet solenoid valve is installed on the connecting pipe. The intelligent pipe network pressure-superposed non-negative pressure variable frequency water supply device has the beneficial effects that the flow stabilization compensator is of dual-cavity integration structure including the flow stabilization cavity and the high-pressure energy storage cavity, the structure is compact, and the occupied land is small; in addition, energy saving can be achieved through the pressure of a tap water inlet pipe; normal water supplying can be guaranteed during small flow pump stopping of the high-pressure energy storage cavity, so that the pump stopping energy saving effect is achieved; meanwhile, the service life is prolonged; after the high-pressure energy storage cavity deflates, automatic air compensation can be achieved; and the intelligent pipe network pressure-superposed non-negative pressure variable frequency water supply device is convenient to use.

A compression algorithm is disclosed in which compressibility of an input frame is determined. If a frame is found to be compressible, it is input to a compression algorithm, otherwise the frame may bypass the compression algorithm. Literals of length N bits in a frame are sorted into 2^N bins such a counter B_i indicates a number of literals of value i. The maximum and minimum counter values are evaluated to estimate the compressibility of the file. For example, if B_max is the maximum counter value and B_min is the minimum counter value, then If B_max<A*B_min (A being a value greater than 1, e.g. 4), the frame may be deemed to be uncompressible, otherwise the frame may be deemed to be compressible and compressed according to the DEFLATE algorithm or some other compression algorithm.

Embodiments of the invention are directed to a DEFLATE compression accelerator and to a method for reducing a latch count required for symbol sorting when generating a dynamic Huffman table. The accelerator includes an input buffer and a Lempel-Ziv 77 (LZ77) compressor communicatively coupled to an output of the input buffer. The accelerator further includes a Huffman encoder communicatively coupled to the LZ77 compressor. The Huffman encoder includes a bit translator. The accelerator further includes an output buffer communicatively coupled to the Huffman encoder.

The invention provides a soft ball curtain ball lifting and collecting system and method based on a lifting device. The system comprises a soft ball curtain and the lifting device, wherein the lifting device is located in the soft ball curtain and fixed relative to the ground; when the soft ball curtain is used for lifting balls, the lifting device ascends so as to support the soft ball curtain, and after the soft ball curtain inflates, the lifting device descends; when the soft ball curtain is used for collecting the balls, the lifting device ascends so as to support the soft ball curtain, and after the soft ball curtain deflates, the lifting device descends, and the soft ball curtain is driven to descend to be folded. The soft ball curtain ball lifting and collecting system and method based on the lifting device can well control the stability of the soft ball curtain in the ball lifting and collecting process, and it is guaranteed that the ball curtain is within a certain area range all the time; after the balls are helped to ascend or descend, the lifting device descends, and ball curtain projection or other use is not affected.

The invention discloses a handheld automatic lifting pile driving (well digging) and pile pulling all-in-one machine. The power is provided by an air pump; the machine is widely applied to pile driving for breach blockage in the case of flood; a well is dug in an earthquake stricken area to develop an underground water source; a well is dug in a force exercise and training position to solve logistical support water; piles are driven in a pasturing area to set a fence, and a well is dug to solve water for people and livestock; the machine can drive the piles (steel pipe handle pressing wells), or can be transferred as needed by pulling the piles (pulling the wells) at any time; as a traditional pile driving method for applying impact force to high ends of pile columns is more liable to cause unstable pile columns, in particular, in specific places such as flood breaches, workers are unstable when standing on rafts in torrents with bare hands, not to speak of lifting hammers to drive the piles; in particular, when the pile columns are higher, the operation cannot be performed, so that the machine applies force to the middle lower parts of the pile columns; the machine is placed on the ground or rafts on the water, and is automatically lifted by a jacking cylinder to be clamped on the pile columns; then, an air hammer vibrator is started to downwards impact; meanwhile, the jacking cylinder deflates, so that the machine is downwards along with the pile columns; when support leg plates touch the ground, a clamping mechanism is released, and the machine is automatically lifted again as the abovementioned operations; the pile columns can be elongated at any time; the operations are repeated by several times to drive the pile columns; and if the wells are dug, handle pressing well heads are mounted at steel pipe pile heads. The piles (wells) can be pulled through reverse operations. During constructing, the machine has no need to be lifted by labors, so that the pile driving (well digging) or the pile pulling is easy. The machine is simple in structure and lower in cost.

The invention provides a dynamic code table generation device and method based on deflate Huffman coding, and the device comprises a code length statistical circuit which is configured to calculate the code length number of each code in to-be-coded data; a minimum coding circuit which is configured to receive the data of the code length statistical circuit and calculate a minimum code corresponding to each code length based on the code length quantity of each code in the data to be coded; and a code table generation circuit which is configured to receive the data of the minimum coding circuit, generate a dynamic code table based on the minimum code corresponding to each code length in the to-be-coded data, and store the dynamic code table in the register. By using the scheme of the invention, the time for generating the dynamic code table can be greatly reduced, the universality of the device can be improved, and the flexibility of the device can be improved.

The invention relates to an air-captive structure for an inflatable tire. A plurality of leakproof film roots are fixed on the inner wall of the crown part of a tire body, a piece of leakproof film isintegrally connected to each leakproof film root, the connecting parts between the leakproof film roots and the leakproof films are preset at the obtuse angle, and all leakproof films are tipped to the right; and in every two adjacent leakproof films, the right end of the leakproof film on the left side is overlapped on the left end of the leakproof film on the right side. According to the air-captive structure for the inflatable tire, the problem that the inflatable tire cannot continue to run for a long time when being punctured and deflates is solved, and the safety performance of the tireis improved.