30 results about "Path stability" patented technology

The present invention provides a low overhead multipath routing method of mobile ad hoc network. m non-intersected main paths are established from a source node SN to a destination node DN. Each main path has an equal length and equally comprises n middle nodes MN and n links. Except for the first hop node and the last hop node, each intermediate node on the main path can reach the destination node through the next hop node on k (1<=k<=m) different main paths. When the data is started to be transmitted, the source node SN selects a main path for data transmission. Each hop node is selected with a dynamic congestion control method, and finally the data message is transmitted to the destination node. The low overhead multipath routing method of the invention can be applied to the dynamic topology multi-hop network to establish a multi-path structure of network data transmission and has the advantages of increasing the path stability, reducing the frequency of routing halt between communication node, reducing the routing overhead of data message and increasing the transmission success rate of data message.

The invention discloses a database optimized storage method based on the industrial control field. The method comprises the following steps of: S1, reading return path data, storing the return path data related to the automatic control rate into a real-time return path automatic control rate acquisition table, and storing the return path data related to the stability rate into a real-time return path stability rate acquisition table; taking the return path data with same space attribute as the tree node data, obtaining and storing the real-time automatic control rate and the stability rate of the tree node according to the return path data in the acquisition tables; S2, while reading the next round of return path data, executing the step S1, and simultaneously executing a step S3; and S3, storing a time stamp in a historical return path acquisition table before storing the current return path data; determining a statistic cycle, accumulating the length of the time stamp, storing the return path data in the historical return path acquisition table into each table corresponding to the statistic cycle, and then, obtaining the historical automatic control rate and the stability rate of the tree node. The invention further discloses a corresponding database optimized query method. With the method provided by the invention, the data query efficiency in a local database with a huge data volume can be improved.

A Hardware-Embedded Delay Physical Unclonable Function (“HELP PUF”) leverages entropy by monitoring path stability and measuring path delays from core logic macros. Reliability and security enhancing techniques for the HELP PUF reduce bit flip errors during regeneration of the bitstring across environmental variations and improve cryptographic strength along with the corresponding difficulty of carrying out model building attacks. A voltage-based enrollment process screens unstable paths on normally synthesized (glitchy) functional units and reduces bit flip errors by carrying out enrollment at multiple supply voltages controlled using on-chip voltage regulators.

The invention provides an ad hoc network stable path routing method based on link lifetime, which does not require a range positioning system, ensures the independence of the routing protocol and can be used to quickly establish a stable route. The connection starting time of the link between the local node and the neighbor node is recorded by each node, and the path stability is updated according to the connection starting time, thereby selecting the most stable path, so that the routing protocol can provide a more stable path for user services, thereby reducing the route maintenance cost and enhancing the efficiency of the routing protocol; the intermediate node and the destination node do not have time delay when forwarding path search messages and path retransmission messages, thereby ensuring the quick establishment of the path; and by using the dynamic path switching method, the path stability is enhanced, which means that the node switches to the new path from the original path after acquiring a new path more stable than the original path, so that the routing protocol can provides the most stable path.

The invention provides a conventional layout aircraft flight path stability determination method and device, and the method comprises the steps: determining a steady-state attack angle of an aircraftunder the conditions of a given flight height and a given flight airspeed according to a condition that the direction sum external force in an airflow shafting is zero; substituting the steady-state attack angle into the pitching moment equation, and determining the steady-state elevator skewness of the aircraft based on the condition that the pitching moment is equal to zero; substituting the steady-state attack angle and the steady-state elevator skewness into a resistance balance equation, and determining a steady-state track inclination angle of the aircraft; determining different steady-state track inclination angles according to different flight airspeeds, and drawing a track inclination angle and airspeed curve; solving the derivative of the track inclination angle to the airspeed at different flight airspeeds on the track inclination angle and airspeed curve; and determining the flight path stability characteristics of the aircraft at different flight airspeeds according to thederivative of the flight path inclination angle to the airspeed at different flight airspeeds.

The embodiment of the invention discloses a laser light path system and a double-head laser marking machine, and relates to the technical field of laser processing equipment. The light path system comprises a laser generator, a light path input module, a light splitting module, a light path output module and a light emitting control module, the laser emitted by the laser generator is guided into the light splitting module through the light path input module, the light splitting module is used for dividing the laser into two beams, the light path output module is used for outputting the laser,the light emitting control module is used for controlling the laser in the light splitting module to pass through the light path output module. According to the provided laser light path system, a vertical light path structure is adopted, the light path input module, the light splitting module and the light path output module each are independently provided with light path structures, moreover, the light path structures communicate with one another, and the laser light path system is simple and compact in structure, high in light path stability and high in light beam quality.

The invention aims to provide a straight-through type outer guide gas injection valve with a float valve seat. Through the float valve seat structure, the function of avoiding reverse leakage caused by unbalanced pressures inside and outside the gas injection valve is achieved, and the operation reliability of the gas injection valve is ensured; the gas inlet and flow guiding processes are achieved through a straight-through structure and a flow guiding cavity structure; control over a valve element and a gas path is achieved through control of an actuator, and the gas injection function is achieved; through cooperation of an outer guide structure, a pressure balance hole and a pressure balance groove, the verticality of the valve element is ensured, stable operation and reliable operation of gas flow are achieved, and the high response speed is achieved; through a mixed gas inlet mode of axial main gas groove direct gas inlet and circumferential supplementation hole gas inlet, high flow is achieved, the gas supply efficiency of an engine is effectively improved, meanwhile, gas flow interference can be avoided, and gas path stability is achieved; and through a plurality of annulus structures between the valve element and the valve seat, face seal of the gas injection valve is achieved, and the high reliability is also achieved.

The invention discloses a flow scheduling method and device based on stable matching, a computer device and a storage medium. The method comprises the following steps of setting a flow and a path; Constructing a preference table for the flow and the path; constructing the flow-path preference tables according to flow and path, constructing a flow-path stability matching model according to the flow-path preference tables; determining an optimal solution according to the flow-path stability matching model; and adopting a one-to-one stable matching method to find the optimal one-to-one stable matching between the flow and the path, so that the optimal scheduling of the flow is realized. According to the method, the defects of special topology oriented, coarse bandwidth distribution granularity and the like existing in an existing flow scheduling mechanism are overcome, the fine-grained bandwidth distribution capable of being applied to all types of topologies is achieved, and the simulation experiment results prove that the method has great advantages compared with previous work.

The invention relates to a real-time evaluation method for service path stability and belongs to the information excavation technology field. The method comprises steps that, a to-be-calculated service path is firstly selected, influence of the quantity of connection nodes on the service path exerted on the service path stability is further calculated; influence of processing capability of all the connection nodes exerted on the service path stability is calculated, influence of association paths of all the connection nodes exerted on the service path is calculated; stability of the service path is calculated. According to the method, the quantity of the connection nodes on the service path, service processing response capability of each knot point and response demand of each knot association path are comprehensively considered to acquire a relative value of stability of the service path which is utilized for selecting the service path and improving the service path.

The invention relates to a compound lens, and an encodable single-frame imaging device and method. The compound lens comprises a parallel light incident surface, a first plane wave emergent surface, asecond plane wave emergent surface and a spherical wave emergent surface, and the spherical wave emergent surface is lens-shaped; the parallel light incident surface is opposite to the spherical waveemergent surface, and the width of the parallel light incident surface is greater than that of the spherical wave emergent surface; the first plane wave emergent surface is opposite to the second plane wave emergent surface; the spherical wave emergent surface is arranged between the first plane wave emergent surface and the second plane wave emergent surface. The composite lens can modulate incoherent parallel light into plane waves and spherical waves; the problems of energy loss, bandwidth limitation, efficiency and fill factor constraint, constraint of the size on the field of view and the like of a spatial light modulator are solved, the imaging advantages of Fresnel associated holography are reserved, incident light beams are completely modulated while the light path stability is improved, and single-frame Fresnel associated holography imaging with pure optical elements is achieved.

The invention aims at providing a bypass type outer guiding gas injection valve with a floating valve seat. Through a floating valve seat structure, the function that reverse leakage caused by unbalanced inner pressure and outer pressure of the gas injection valve is avoided is achieved, and work reliability of the gas injection valve is guaranteed. The gas inflow and flow guiding process is achieved through a bypass structure and a flow guiding cavity structure. Valve element control is achieved through executer control, and the gas valve gas injection function is achieved through gas path control. Through cooperation of an outer guiding structure, a pressure balance hole and a pressure balance groove, perpendicularity of a valve element is guaranteed, gas flow stable work is achieved, reliable work is achieved, and the high response speed is achieved. Through the mixed gas inflow manner of direct gas inflow of an axial main gas groove and gas inflow of a circumferential gas supplementing hole, large flow is achieved, and the gas supply efficiency of an engine is effectively improved; and meanwhile, gas flow interference can be avoided, and gas path stability is achieved. Through a multi-girdle structure between the valve element and the valve seat, face sealing of the gas injection valve is achieved, and reliability is high.

The invention provides an automatic multi-ink-path ink supply control system and method. The automatic multi-ink-path ink supply control system comprises ink bottles and multiple ink supply pipes, andfurther comprises a temperature detection and heating module, a sensor detection module, an alarm module and a USB communication and a power supply module. The temperature detection and heating module is used for monitoring the temperatures of ink in the ink bottles in real time and carrying out heating and heat preservation on the ink according to the actual requirements. The sensor detection module is used for detecting whether the ink bottles are installed and the quantity of ink remaining in the ink bottles after the ink bottles are installed. The alarm module is used for giving out an alarm in time when it is detected that the ink bottles are not installed or ink runs out. The USB communication and power supply module is used for supplying power to the system and communicates with aprinting module. The temperature detection and heating module, the sensor detection module and the alarm module are all connected with a processor. The USB communication and power supply module is connected with the processor and the printing module. The automatic multi-ink-path ink supply control system achieves the design of integrating multi-path ink supply system control and management alarm,and is more flexible in structure, and furthermore, the ink path stability of a product is greatly improved.

The invention discloses a crimping type roof lightning protection belt and an installation method thereof, and relates to the technical field of building roof lightning protection belt construction. At present, hot galvanizing round steel should be firstly selected for a conventional lightning strip, the connection mode is welding, the welding position needs to be coated with anti-corrosion paint,raw material pieces are extremely prone to corrosion, and the electrical access effect becomes worse and worse. The provided lightning protection belt comprises support rods made of stainless steel composite materials, connecting rods, double-hole connecting plates, short-needle lightning arresters and two-way to five-way crimping joints. The supporting rods and the connecting rods are connectedthrough the crimping joints in a crimping manner, so the lightning protection belt supported by parapet walls and the roof is formed. Parapet wall supporting rods are reinforced and protected throughprotective sleeves, roof supporting rods are reinforced and supported through finished product supports, parapet wall downleads are connected with the short-needle lightning arresters and the connecting rods through the double-hole connecting plates and the three-way crimping joints, and the supporting rods are fixed in steel bar embedding holes of the parapet wall and the roof. The installation operation is simple, the connection is firm, the electrical path stability of the lightning protection belt can be effectively improved, and the lightning protection effect is good.

The invention relates to a satellite long-delay high-efficiency MPLS network route oscillation processing device, which comprises a route sensing unit, a message transmit-receive unit and a state recording unit. The route sensing unit is used for carrying out route optimum selection and judging whether an MPLS network has a route deleting or adding event; the message transmit-receive unit is used for receiving and sending an MPLS control message and is interacted with routing neighbors on the network; and the state recording unit is used for recording FEC state, and carrying out state update according to the route event sensed by the route sensing unit. The route sensing unit is communicated with the message transmit-receive unit; the message transmit-receive unit is communicated with the state recording unit; and the state recording unit is communicated with the route sensing unit. The device and method improve MPLS label switch path stability and availability under a satellite long-delay environment, especially under a large-scale routing environment.

The invention provides a screw assembly, including a clamping plate and a stainless steel shrapnel. The clamping plate comprises an upper layer clamping plate, a lower layer clamping plate, and a clamping plate opening between the upper layer clamping plate and the lower layer clamping plate. A screw hole holding a screw is arranged through the clamping plate. The stainless steel shrapnel is in the clamping plate opening. The stainless steel shrapnel is provided with a round opening corresponding to the screw hole. The region of the stainless steel shrapnel, close to the round opening, and theregion close to the edge are in different planes. An acute angle is between the region of the stainless steel shrapnel, close to the round opening, and the upper layer clamping plate, and an acute angle is between the region of the stainless steel shrapnel, close to the edge region, and the lower layer clamping plate. The screw assembly is provided with an anti-loose mechanism, and can effectively ensure good contact of the screw assembly and a screw. The screw assembly ensures path stability of a radio frequency current loop, to prevent impedance of the radio frequency loop from changing, soas to ensure that a radio frequency discharge condition would not drift.

The invention discloses a method and device for self-adaptively pairing uplink multi-input/multi-output (MIMO) and solves the problems of poor pairing efficiency, poor chain path stability and low data transmission reliability in the traditional mode. The method comprises the following steps of: determining a terminal to be paired according to the capability of the user terminal for executing the MIMO and retransmitting information of a hybrid automatic retransmitting request (HARQ) of the user terminal when an event for triggering the pairing is received and the paired period reaches; determining a second terminal to be paired, which is paired with the terminal to be paired and pairing according to an uplink modulation coding index (UIUC) value and paired information of the terminal to be paired; and determining whether to split the pair of the terminal to be paired according to the retransmitting information of the HARQ when the terminal to be paired is paired and the pair splitting period reaches. With the technical scheme disclosed by the invention, the pairing efficiency and the success rate can be improved and the reliability for data transmission can be improved.

The invention relates to a method for synthesizing key intermediates of ACC inhibitor drugs, which belongs to the field of chemical synthesis. The method of the invention mainly obtains target compounds by improving starting materials, Gewald aminothiophene reaction, amide synthesis, ring closure, bromination and other reactions , does not need the alkaline hydrolysis step of ethyl formate group, and also does not need the next step of decarboxylation reaction, shortens the reaction process, has the advantages of stable and safe route, low cost, cheap and easy-to-obtain raw materials, and high yield.

The invention aims to provide a straight-through type piezoelectric outer guide gas injection valve with a float valve seat. Through the float valve seat structure, the function of avoiding reverse leakage caused by unbalanced pressures inside and outside the gas injection valve is achieved, and the operation reliability of the gas injection valve is ensured; the gas inlet and flow guiding processes are achieved through a straight-through structure and a flow guiding cavity structure; control over a valve element and a gas path is achieved through control of a piezoelectric actuator, and the gas injection function is achieved; through cooperation of an outer guide structure, a pressure balance hole and a pressure balance groove, the verticality of the valve element is ensured, stable operation and reliable operation of gas flow are achieved, and the high response speed is achieved; through a mixed gas inlet mode of axial main gas groove direct gas inlet and circumferential supplementation hole gas inlet, high flow is achieved, the gas supply efficiency of an engine is effectively improved, meanwhile, gas flow interference can be avoided, and gas path stability is achieved; and through a plurality of annulus structures between the valve element and the valve seat, face seal of the gas injection valve is achieved, and the high reliability is also achieved.