220 results about "Recovery stage" patented technology

A cluster recovery process is implemented across a set of distributed archives, where each individual archive is a storage cluster of preferably symmetric nodes. Each node of a cluster typically executes an instance of an application that provides object-based storage of fixed content data and associated metadata. According to the storage method, an association or “link” between a first cluster and a second cluster is first established to facilitate replication. The first cluster is sometimes referred to as a “primary” whereas the “second” cluster is sometimes referred to as a “replica.” Once the link is made, the first cluster's fixed content data and metadata are then replicated from the first cluster to the second cluster, preferably in a continuous manner. Upon a failure of the first cluster, however, a failover operation occurs, and clients of the first cluster are redirected to the second cluster. Upon repair or replacement of the first cluster (a “restore”), the repaired or replaced first cluster resumes authority for servicing the clients of the first cluster. This restore operation preferably occurs in two stages: a “fast recovery” stage that involves preferably “bulk” transfer of the first cluster metadata, following by a “fail back” stage that involves the transfer of the fixed content data. Upon receipt of the metadata from the second cluster, the repaired or replaced first cluster resumes authority for the clients irrespective of whether the fail back stage has completed or even begun.

A system for chilling the pressurized charge air to a reciprocating engine is disclosed wherein the chilling is provided by a thermally activated refrigeration cycle powered by waste heat from the engine system. This reduces the required compression power, and also retards knock, making higher compression ratios possible. The chilling system is designed to minimize the amount of chilling required, and also to enable use of compression heat to power the chiller. The disclosed improvement also accommodates exhaust gas recirculation, plus providing activation heat from the exhaust gas, plus Miller cycle timing of the intake valves. Referring to FIG. 1, the charge air from turbocharger 5 is cooled in three stages: heat recovery stage 10; ambient-cooled stage 11; and chilling stage 12. Condensed moisture is removed from the charge air by valve 14 before the charge is supplied to inlet manifold 2.

A method and system for multi-staged recovery of a distributed computer system. The method includes receiving a failure event notification from at least one node of the distributed computer system and executing a plurality of recovery stages upon receiving the failure event notification by using a recovery manager, wherein each of the plurality of recovery stages performs a defined recovery task. The progress of recovery is tracked by using at least one state machine executed by the recovery manager, wherein the state machine reflects progress of each of the recovery stages. The progress of recovery is monitored to a completion by using the state machine and the recovery manager.

The invention discloses a photovoltaic grid-connected inverter low voltage ride through (LVRT) control method, and relates to the field of grid-connected photovoltaic power generation. The method is characterized by comprising a distribution procedure of active power and reactive power in the LVRT process, and procedures about elimination of current peak and protection to an inverter. The procedure of protection to the inverter includes that when a grid is in a grid voltage drop stage or in a grid voltage recovery stage, if an average current value of any phase of three-phase current outputted by the inverter is detected to exceed an average threshold value, a pulse-width modulation (PWM) control signal of the inverter is switched off, and the PWM control signal of the inverter can be recovered after duration of half PWM control signal cycle time; and if an instantaneous value of any phase of the three-phase current of an output end of the inverter is detected to exceed an instantaneous threshold value, the connection between the inverter and the grid can be switched off. The instantaneous threshold value is higher than the average threshold value and the like.

The invention provides a multi-agent based distribution network disaster responding recovery coordinate control method and a multi-agent based distribution network disaster responding recovery coordinate control device. The method comprises the steps of firstly determining an objective function and constraint conditions of distribution network disaster responding recovery, dividing a distribution network recovery stage into a backbone channel recovery stage, a local distribution network recovery stage and a region networking recovery stage, then setting the stages of distribution network recovery to be a backbone recovery Agent, a local distribution network recovery Agent and a region networking recovery Agent respectively, establishing a blackboard model based MAS coordination mechanism, establishing an MAS based distribution network recovery control decision making system, acquiring a recovery result, carrying out verification on the recovery result by adopting a verification Agent, acquiring a final recovery result, transmitting the final recovery result to a user interface Agent through a global recovery Agent, and putting an end to distribution network disaster responding recovery. Therefore, the reliability in power supply of an electric power system is improved, the power supply reliability of the electric power system under natural disaster conditions in particular is improved, and the investment income of a power grid is improved.

A payload delivery and recovery system, having a payload including a data collection device arranged to collect data, and a controllable ascent vehicle comprising a controllable lighter than air (LTA) mechanism detachably coupled to the payload and used during an ascent phase to deliver the payload to a pre-determined altitude. The payload delivery and recovery system also having a controllable descent mechanism releasably attached to the controllable ascent vehicle and that can be used during a descent phase for reducing a rate of descent of the payload subsequent to release of the payload at the pre-determined altitude and including a control system for navigating the payload to a desired ground location during a recovery phase.

The invention is applicable to the field of data communication and provides a method and a system for network congestion management. The network comprises a core network entity with a congestion detection function and an upstream network entity capable of responding to congestion notification information. The invention is characterized in that the method comprises the following steps: the core network entity sends the congestion notification information to the upstream network entity when detecting the congestion situation; the upstream network entity reduces the data transmission rate by a certain step value according to the received congestion message information and resets a timer or a counter for counting the number of data packets; and the timer or the counter triggers the upstream network entity to enter a rate recovery stage when overflows. When the timer or the counter overflows, the upstream network entity increases the data transmission rate and reduces the waste of the network bandwidth.

The invention provides a control method for synchronizing rotating speed in power upshift of a wet-type double clutch automatic transmission. The control method divides a rotating speed synchronizingstage in the power upshift process in detail into a rotating speed disengaging stage, a rotating speed closed-loop control stage and a recovery stage and the control methods in the stages are improved, so that clutch coupling is achieved better when the rotating speed is synchronized. Meanwhile, a torque request of an engine is controlled precisely, and impact generated by synchronizing the rotating speed is avoided to the maximum extent.

The invention discloses a quantitative recovery method for the long-term blowing-down of a blast furnace, belonging to the technical field of blast furnace iron-making. A long-term blowing-down and furnace condition recovery process is divided into four phases, namely, a blowing-down operation phase, a blowing-down phase, a blowing-in operation phase and a furnace condition recovery phase by taking air quantity control as a core, according to the focused work in each phase of the long-term blowing-down and furnace condition recovery process of the blast furnace. The quantitative recovery method has the advantages of standardizing the long-term blowing-down recovery phase of the blast furnace and the control standards of various parameters, and providing a guarantee on the safety and the high efficiency of the recovery process.

The invention discloses a method for synthesizing low-chloride polyphenylene sulfide resin, comprising the following steps: taking sodium sulfide and p-dichlorobenzene with the molar ratio of 1:1 as raw materials, N-methyl-2-pyrrolidone as a solvent, and carrying out polycondensation to generate the polyphenylene sulfide resin under the action of alkali metal cosolvent. The synthesizing process mainly comprises the following steps: adding adjuvant lithium aluminum hydride in the dewatering phase of sodium sulfide; adding molecular weight regulator and deionizer in the polycondensation stage; and adopting an extraction process in the resin recovery stage. The product obtained in the invention has low content of halogen element, relative low polydispersion coefficient, very narrow molecularweight distribution, high oxygen index and other excellent performance indexes, can be used as products such as injection moulds, extrusion moulds, fibers, films and the like, can be widely used in the fields such as machinery, chemical industry, electrical and electronic products, military project, aerospace and the like, and is particularly applied to electrical and electronic field with very excellent electrical insulation property.

A method for testing temperature instability under negative bias relates to the field of semiconductor technology processing procedure. The method comprises the following steps: 1. the method for testing temperature instability under negative bias is characterized in that step 1, stress is applied to gate voltage to lift the gate voltage to gate voltage and then the gate voltage is reduced to an absolute value smaller or equal to working voltage in t; step 2, when the recovery stage finishes and before the next stress stage begins, an MOS transistor is measured; step 3, step 1 and step 2 are circularly executed until the accumulated stress time reaches reliability test standard. The method has the advantages of accurately testing temperature instability effect under negative bias, improving the accuracy of reliability assessment of semiconductor products, being beneficial to improving the technology of temperature instability under negative bias, shortening the cycle of product development and saving production cost.

The invention relates to a frequency support control method used for a doubly-fed wind generation set and based on two-stage power tracking optimization. The invention starts from optimization of frequency support dynamic characteristics of a wind generation set and provides a frequency support control method used for the wind generation set and based on two-stage variable proportion coefficient optimized power tracking. On the basis, a variable proportion coefficient control strategy in an inertial response stage is derived based on a virtual inertia time coefficient and a rotor movement equation, and for quick recovery of a maximum power tracking operation mode of the wind generation set after inertial support and avoiding secondary disturbance from being produced on system frequency adjustment in a recovery process, a variable proportion coefficient control strategy in a maximum power tracking operation mode recovery stage is designed by adopting fussy control. The frequency supportcontrol method provided by the invention has control robustness, a control structure is simple, engineering implementation is easy, and the quick recovery of the maximum power tracking operation modeof the doubly-fed wind generation set after inertial response and inertial support on a power grid frequency can be realized.

The invention provides a data reconstruction method for disk array, which belongs to computer data storage methods and solves the problems that disk array data reconstruction consumes excessive time and affects the reading-writing performance and reliability of systems. The method consists of a reconstruction stage and a recovery stage in sequence, wherein an agent disk array is arranged outside a disk array during reconstruction; a user control interface, a reconstruction module, a space management module, a hot data identification module, a request redirection module, a data recovering module, a redirection data log table and a non-hot data chain list are arranged on the disk array during reconstruction; the reconstruction stage comprises a reconstruction step and a reconstruction-stage request processing step which are concurrent; and the recovery stage comprises a data recovering step and a recovery-stage request processing step which are concurrent. The method has the advantages of accelerating reconstruction speed and reducing the access response time of users, does not change reconstruction process or the data distribution mode of the disk array, and is suitable for constructing the storage systems with high performance, availability and reliability.

The invention discloses a handling method of province-level power grid black-start and large-area power failure accidents. The black-start of the power grid is divided into two stages, schemes of black-start of several subsystems are generated on conditions that black-start power sources and other constraint conditions are satisfied, and all of the schemes of black-start of the several subsystems are relatively independent and synchronous recovery is possible. When all of the subsystems are recovered, power is transmitted to surplus non-transmitted nodal points of designated girds, and power supply points are charged nodal points in the system at the moment, power-transmission paths are preferably calculated and are not necessarily black-start assembling units. The handling method of the province-level power grid black-start and large-range power failure accidents takes quick recovery optimization algorithms of large-area power failure accidents as the core, provides black-start optimization schemes by utilizing black-start optimization algorithms, divides the province-level power grid black-start into a stage of subsystem independent recovery and a stage of interconnection and corporation recovery to ensures that establishment of black-start schemes is more systemic and scientific.

The invention provides a method for continuously producing n-chlorobutane, which belongs to an organic synthesis process. The process consists of reactive distillation stage, an isobutanol recovery stage and a washing distillation stage. The process substitutes hydrogen chloride gas for 30 percent of hydrochloric acid, integrates a reaction stage with a separation stage, adopts an azeotropic water-shift technique, controls the unit consumption needed for producing one ton of 99.5 percent n-chlorobutane to be less than 0.86 ton of isobutanol, 1.8 tons of hydrogen chloride gas, 1.8 tons of steam, 60 kwh or electrical power and less than 0.001 ton of formed COD, reduces 80 percent of sewage discharged during the whole process, and reduces 80 percent of energy consumption. A product obtained by the method contains more than 99.5 percent (weight) of n-chlorobutane, less than 0.02 percent (weight) of isobutanol and less than 0.01 percent (weight) of dibutyl ether.

The invention relates to a novel method for the production of beta-carotene from submerged cultures of mucoral fungi such as Blakeslea, Choanephora or Phycomyces by adding lectin to the culture medium and performing pH control once fermentation has started. The method involves beta-carotene recovery stage that makes it possible to simplify the process, optimize yields and increase purification of the product.

A manufacturing process for a remelt block containing aluminum designed for making aluminum alloy for the aircraft industry in which scrap containing mainly aluminum alloys used in the aircraft industry is supplied during a supply stage, the scrap is melted in a smelting furnace in order to obtain an initial molten metal bath during a smelting stage, the initial molten metal bath is subjected to purification by fractional crystallization in order to obtain a solidified mass and a bath of residual liquid during a segregation stage, and the solidified mass is recovered in order to obtain a remelt block during a recovery stage. The invention is particularly useful for the recycling of aluminum alloys used in the aircraft industry as it makes it possible to purify scrap of series 2XXX or series 7XXX alloys for iron and silicon, without eliminating additive elements such as zinc, copper and magnesium.

The invention relates to the technical field of re-election of lean hematite tailings, in particular to a method for iron concentrate in tailings in the recovery stage of grinding, coarse and fine separation, and gravity-magnetic-flotation process, which is characterized in that the lean hematite stage The comprehensive tailings in the combined process of ore grinding, coarse and fine classification, gravity separation-magnetic separation-flotation are obtained by gravity separation and weak magnetic sweeping. Roughing, beneficiation and three-stage scavenging of weak magnetic and strong magnetic-reverse flotation operations to recover magnetic ore in tailings. In the present invention, the comprehensive tailings are sorted by gravity separation and weak magnetic sweeping, and the rough concentrate with a grade of 27% to 31% is recovered, which reduces the processing capacity of subsequent grinding and sorting operations and improves the selection of subsequent operations Grade; regrind the coarse concentrate to dissociate the intergrowth in the coarse concentrate; use weak magnetic, strong magnetic-reverse flotation to sort the regrind coarse concentrate, and obtain the final grade of more than 66%. Concentrate, to reduce the comprehensive tailings grade by 1%, to achieve the effective use of resources.

The invention discloses a multimodal flight conversion control method for a hybrid layout rotary-wing unmanned aerial vehicle, and relates to the technical field of flight control for unmanned aerial vehicles. Based on composite multimodal multipurpose aircrafts, the hybrid layout rotary-wing unmanned aerial vehicle comprises five types of flight modal; and aiming at a take-off/air-drop stage, a task arriving stage, a task executing stage, a task evacuating stage and a landing/recovery stage respectively, the multimodal flight conversion control method provides seven modal conversion modes and conversion opportunities. According to the multimodal flight conversion control method provided by the invention, the hybrid layout rotary-wing unmanned aerial vehicle can be reasonably converted among various modal types to meet different task requirements, and the multimodal flight capability and the multitask capability of the hybrid layout rotary-wing unmanned aerial vehicle can be sufficiently exerted; and the general land take-off and landing capability of the hybrid layout rotary-wing unmanned aerial vehicle can be sufficiently exerted, the flexible water-surface/carrier-borne/vehicle-mounted/airborne drop and other deployment modes of the hybrid layout rotary-wing unmanned aerial vehicle can be utilized, and the high-speed cruise capability and the low-altitude and low-speed capability of the hybrid layout rotary-wing unmanned aerial vehicle can be sufficiently exerted, so as to achieve the rapid arriving and evacuating as well as low-speed and low-altitude task executing capabilities of the hybrid layout rotary-wing unmanned aerial vehicle.

The invention provides a comprehensive prevention and control method for anthracnose of potted sword-leaved cymbidium, belonging to the field of agricultural plant disease control. By aiming at the four growth stages including a leaf-bud budding stage, a bud and young leave growth stage, a flowering stage and a dormancy recovery stage of the potted sword-leaved cymbidium, five prevention and control measures including agricultural prevention and control, plant quarantine, illness monitoring, biological prevention and control, and chemical agent prevention and control are integrally assembled, so that the comprehensive prevention and control measures suitable for each growth stage are provided. The comprehensive prevention and control method for the anthracnose of the potted sword-leaved cymbidium can efficiently control the anthracnose of the cymbidium, obviously reduces number of use and usage amount of pesticide, and has great significance for improving the ornamental value and the economic value of the potted sword-leaved cymbidium and protecting the ecologic environment.

The invention discloses a reactive routing protocol based on geographic information in a wireless sensor network, which utilizes the geographic information in a wireless sensor network and combines the thought of a reactive route to design a novel routing protocol. By a reactive routing mechanism, a neighbor table built between nodes is cancelled, the function of a routing table is strengthened so as to lower cost for searching routes, and the routing table is only built when data is required to transmit. The routing protocol searches the shortest path between a resource node and a target node when finishing a route request and a route recovery stage; in the route request stage, broadcast is applied to send a route request data packet to build a reverse routing table and find the shortestpath to reach the resource node. In the route recovery stage, unicast is applied to send a route recovery data packet, and the built reverse routing table is utilized to find a shortest path between the resource node and the target node. The invention lowers route discovery cost, improves route discovery reliability and increases route transmission efficiency.

The invention provides a health monitoring system and method, and relates to the technical field of medical treatment and health care. The health monitoring system comprises a data collecting module and an intelligent processing module electrically connected with the data collecting module. The health monitoring method includes the steps that the data collecting module collects health data of a human body and transmits the health data to the intelligent processing module, and the intelligent processing module performs analysis and processing according to the health data to obtain the health condition index and focus characteristics of the human body. By means of the health monitoring system and method, the health index of the cardiopulmonary system and body temperature of an infant can be intelligently analyzed, health monitoring in the initial disease stage, the treatment stage and the recovery stage is achieved, and treatment reference is provided for a parent and a doctor.

The invention discloses a helicopter/engine comprehensive simulation model. The invention introduces a spin state rotor rotordynamic differential equation into the helicopter/engine comprehensive simulation model, thereby accurately simulating helicopter dynamic change in a helicopter spin training process. The invention further discloses a method and a system for controlling a turboshaft engine based on the model. In a normal flying stage, a spin starting stage and a stable spin stage, and before a clutch is closed in a spin recovery stage, a univariance controller using fuel oil flow as a control variable is used for controlling the turboshaft engine; and after the clutch is closed in the spin recovery stage, a bivariate controller using fuel oil flow and a guide vane angle as control variables is used for controlling the turboshaft engine. The helicopter/engine comprehensive simulation model provided by the invention can make the overshoot of a free turbine rotating speed of the turboshaft engine in the helicopter spin training process not more than 3%, and greatly improves dynamic quality of the fuel oil.