106results about How to "Reduce the risk of instability" patented technology

The invention discloses a hot patching implementation method of an embedded system. The method includes: finding the old function in an existing system, changing the first instruction of the function into a skip instruction with the skip address pointing to a new function so as to allow the new function to replace the old function. By the method, system software function updating and defect fixing can be completed while a software system cannot be replaced and equipment restarting is unavailable.

This is a cable stayed steel truss module structure and its construction method. At least two steel trusses are installed to support a high building to be grouted with connecting steel held in between. At least four truss cables are stayed between the building and the steel truss. Beam is installed on the top of the truss with falsework module fixed to the beam.

The invention relates to a quick coring drilling system without a marine riser and method based on circulating drilling fluid. The quick coring drilling system comprises a mud circulation system and acoring drilling system body, wherein the coring drilling system body comprises a drill pipe, a spearhead, a driving device, a hydraulic down-hole hammer, a core pipe and a drill bit which are sequentially connected from top to bottom inside the drill pipe; the mud circulation system comprises a return cone, a recovery pump, a mud tank, a mud pump and a conveying pipeline group; the conveying pipeline group comprises a first conveying pipeline, a second conveying pipeline and a third conveying pipeline; and the mud tank, mud pump, the drill pipe, the return cone and the conveying pipeline group are in communication with each other to form a mud circulation channel. The quick coring drilling system does not use the marine riser, the time for lowering a pipe column is reduced, the emergencyrelease speed is accelerated, the connection can be quickly performed through the return cone, time and cost are saved, and the risk of wellhead instability is reduced.

The invention discloses a method for realizing persistence of a memory database, which comprises the following steps of: writing a writing operation into a persistence layer, and then writing into a Redis memory database; performing data elimination on the Redis memory database; eliminating the cold data eliminated by the Redis memory database; and reading the Redis memory database by a reading operation, and when the corresponding data is not read, reading the data in the persistent layer and reversely writing the data into the Redis memory database. By adopting the design of separating the cache layer from the persistent layer, the server is transformed, and a persistence scheme for optimizing the native Redis is transformed into a persistence scheme in which the persistence part is independently processed by the LevelDB, so that the instability risk of the native persistence scheme is reduced; the data security and the system recovery efficiency are improved; and the problem that the Redis memory database is crazy and occupies the memory is solved.

Disclosed is a liquid cooling module for computer servers, including: a pump, a fan, a heat exchanger, at least two ventilation grilles, an open central longitudinal space between the pump and the heat exchanger that is arranged to facilitate airflow therein from a grille of one short side wall to a grille of the other short side wall, this airflow being driven by the fan, a portion of secondary hydraulic circuit located in the liquid cooling module, for circulating a fluid coolant, including no bypass that would allow the pump to operate as a closed circuit and likely to clutter this open longitudinal space, a circuit control board positioned in the longitudinal extension of the open central longitudinal space so as to be directly swept by the airflow.

The invention provides a control platform of automation equipment with multiple interaction channels. The platform comprises an event management module, an action execution management module, a service management module and a center management module, wherein the event management module is used to distribute events to each registered event processing program for processing; the service management module is used to execute specific business processes of a service and call a corresponding achievement interface according to state changes during service execution; the action execution management module is used to run working processes of an action and call the corresponding achievement interface according to the state changes of the action during running; and the center management module is used to control each module in the control platform to conduct registration and monitoring. The platform provided by the invention has the advantages that cooperative stability between each module and each business working process in the automation equipment could be enhanced; complexity of development of each business working process and each input and output module in the automation equipment could be reduced; and stability of overall running of the automation equipment could be enhanced.

The invention relates to a method for cooperatively regulating and controlling the phase state of a natural gas hydrate in a reservoir through a drilling fluid additive and a temperature and pressurefield, and belongs to the technical field of natural gas hydrate development. The method comprises the following steps of calculating dynamic distribution rules of a reservoir temperature field and anatural gas hydrate decomposition interface under the conditions of different drilling fluid displacements, injection temperatures and drilling fluid additive concentrations, and drawing a relation curve of the drilling fluid additive concentrations, the injection temperatures and the displacements with the saturation of the reservoir natural gas hydrate; and obtaining an optimal combination of drilling fluid additive concentration, injection temperature and displacement by utilizing a particle swarm algorithm, so that the saturation change of the reservoir natural gas hydrate is minimum. Accurate regulation and control of the reservoir natural gas hydrate phase state of deep-sea shallow-layer complex-structure well drilling can be achieved, and method guidance is provided for inhibiting reservoir natural gas hydrate decomposition in the drilling process.

The invention provides a construction method of an air duct structure sharing a side wall together with a subway station. The construction method of the air duct structure sharing the side wall together with the subway station specifically comprises the steps of firstly, adopting a mode of erecting templates on the two sides to construct the side wall shared by the air duct structure and the subway station; secondly, breaking station fender posts in a shared side wall area according to a mode of breaking one post every 2-4 posts; finishing excavation of earthwork and construction of an air duct bottom plate, wherein the air duct bottom plate is connected with a station middle plate through a fender post breaking area to form a temporary support; after a station main body structure is constructed, breaking the rest fender posts, and pouring micro-expansion concrete in the breaking area; and fixing the template on the air duct side of the shared side wall on a supporting net sheet by embedding a steel reinforcement anchor bolt in the station building envelope and welding the supporting net sheet on the exposed end of the steel reinforcement anchor bolt. The construction method of theair duct structure sharing the side wall together with the subway station can be widely used for construction of the air duct structure when the station and an air duct share the side wall; the apparent mass of concrete of a shared side wall cast-in-place structure is guaranteed; and the occurrence of foundation pit instability accidents is avoided.

The invention relates to the technical field of a building and particularly relates to a tower tube pouring construction method and a tower tube. The tower tube pouring construction method comprises the steps of: Step 100, respectively arranging an external mold and an internal mold on two sides of the tower tube to be poured; Step 200, arranging a sealed cabin capable of expansion and shrinkage in the internal mold; Step 300, pouring concrete between the external mold and the internal mold to form the tower tube; fluid is injected into the sealed cabin while concrete is poured, so that first acting force that the sealed cabin acts on the inner surface of the internal mold is no less than second acting force that concrete acts on the external surface of the internal mold. The tower tube is constructed by the tower tube pouring construction method. The invention aims at disclosing a tower tube pouring construction method and a tower tube, thereby solving a technical problem that the tower tube pouring construction cost is relatively high in a prior art.

The invention discloses a noise reduction method after histogram equalization of a low-illumination image. The method takes a plurality of minimum brightness values as a reserved set and traverses all pixels, and comprises the following three situations of 1: for the pixel brightness values belonging to the reserved set, keeping the pixel brightness values unchanged; 2, for the pixel brightness values which do not belong to the reserved set, if the brightness values of eight pixels in a 5*5 area around the pixel belong to the reserved set, valuing the pixel brightness in the reserved set; and 3, for other situations, according to the pixel characteristics in the 5*5 area around the pixel, adaptively constructing a 5*5 filtering template, and calculating the brightness value of the pixel by using the filtering template. Compared with the noise reduction via a Gaussian low-pass filter, the method has the advantage that the information in a dark environment can be visually identified better.

The invention provides a nozzle throat section with annular reinforcing ribs. The annular reinforcing ribs are arranged outside an inner cylinder body in the throat section, the overall rigidity of the throat section is enhanced, and the risk of instability of the throat section is reduced. Two or more annular reinforcing ribs are distributed on the outer circumferential surface of the inner cylinder body in the axial direction, and two or more axial strip-shaped grooves are distributed in the outer circumferential surface of the inner cylinder body in the circumferential direction to serve ascold water tanks; and the cold water tanks penetrate through the axial direction of the inner cylinder body to form a cooling water channel, a connecting flange is provided with a water inlet channeland a water outlet channel which are in communication with the cooling water channel; annular grooves which are in one-to-one correspondence with the annular reinforcing ribs are distributed on the inner circumferential surface of an outer cylinder body in the axial direction, when the outer cylinder body sleeves the outer portion of the inner cylinder body, the annular reinforcing ribs are located in the annular grooves corresponding to the outer cylinder body; and the outer cylinder body is fixedly connected with the annular reinforcing ribs, and the nozzle throat section of the structure form can adapt to the use requirements of high mach numbers.

Provided is a photovoltaic parallel inverter system having shared capacitor topology. The system comprises a plurality of paths of photovoltaic grid-connected inverter units. Each path of photovoltaic grid-connected inverter unit is connected in series with an independent AC output LC filter unit to form a branch; the plurality of branches are connected in parallel, and the output ends thereof are connected with a shared capacitor unit; the output end of the shared capacitor unit is connected with a power grid; and the LC filter output by each branch and a filter capacitor of the shared capacitor unit and an equivalent inductor at the power grid side form an LCCL filter structure. Since the capacitor of the shared capacitor unit is connected in parallel with the filter capacitor of each branch, the system, on the whole, is still an LCL filter structure; the product of the inductance and capacitance of the AC output LC filter unit is equal to the product of the inductance at the power grid side and the capacitance of the shared capacitor unit, that is, the product of the inductance and the capacitance at the inverter side is equal to the product of the inductance and the capacitance at the power grid side; and the resonant frequency of the LCL filter structure does not change with the number of the branches.