34results about How to "Reduce the possibility of instability" patented technology

The invention belongs to the technical field of semiconductor memory test and discloses a semiconductor memory aging test system and a method. The system comprises a test core board and a test board.The test core board generates a t signal and a power signal according to that instruction of the upper computer, and after the test signal and the power signal are adjusted, the test signal is provided to a DUT, and the DUT output signal is compared with a preset value to obtain a preliminary test result which is partitioned and stored, and is uploaded to the upper computer; the test board is usedfor carrying DUT, providing clock signal and chip selection signal for DUT. A single test board is provided with a plurality of t bits, and DUT aging test can be carried out by a single DUT or by multiple DUTs at the same time. By outputting various types of test signals on the test core board, and adjusting the delay time of the test signal, strengthening the processing of driving, waveform control, and compensating the power signal, and storing the test results in the partitioned storage area respectively, the functions of management of single DUT test process control and failure analysis in aging test are realized, and the same test number of DUT is increased, which reduces the test resource overhead.

The invention belongs to the technical field of high-low temperature aging test of semiconductor memory, and discloses a high-low temperature aging test box of semiconductor memory, which is providedwith a normal temperature region and one or more groups of test regions composed of a first temperature region, a second temperature region and an isolation region. The temperature difference betweenthe two temperature zones is constant; the normal temperature area is used for placing the upper computer and the switch, and the heat dissipation device is arranged for the upper computer and the switch; a test area is used for place semiconductor memory aging test equipment; a first temperature zone for placing a first backplane of the aging test system and a test core board removably pluggableon the first backplane; a second temperature region for placing a second backplane and a test board removably insertable on the second backplane; the isolation area is provided with a through board, and the test signal and the power signal sent from the test core board located in the first temperature area are transmitted to the test board located in the second temperature area through the throughboard. A heat sink for dissipating heat to the through plate is provided on the side of the isolation zone to reduce the influence of the temperature of the second temperature zone on the first temperature zone.

The present invention provides a substrate supporting structure and a reaction chamber containing the substrate supporting structure. The substrate supporting structure comprises a substrate supporting disc and a cylindrical supporting member, wherein the cylindrical supporting member is vertically arranged, the substrate supporting disc is supported on the top end of the cylindrical supporting member, the top end of the cylindrical supporting member is provided with a supporting member projection or a supporting member recess, the substrate supporting disc is provided with a supporting disc recess corresponding to the supporting member projection or a supporting disc projection corresponding to the supporting member recess, and the supporting member projection and the supporting disc recess are matched or the supporting member recess and the supporting disc projection are matched so as to lock the substrate supporting disc on the cylindrical supporting member. With the present invention, the problems that the substrate-placed substrate supporting disc easily fly out during a rotation process and rotation of the substrate supporting disc is not stable are solved.

The invention discloses a combined bridge with open pore plate formwork and a construction method of the combined bridge. The combined bridge comprises a combined beam, the open pore plate formwork and a concrete bridge deck, wherein the open pore plate formwork comprises a fold-shaped steel plate and an open pore plate connecting part, the fold-shaped steel plate and the combined beam are welded,the open pore plate connecting part is welded to the fold-shaped steel plate, and multiple open pores are formed in the open pore plate connecting part; the concrete bridge deck comprises a concreteslab and steel bars, the multiple steel bars are cast into the concrete slab and penetrate through the open pores, and the steel bars and the open pore plate connecting part are welded. In the combined bridge, the open pore plate formwork and the upper wing edge of the combined beam are welded and stressed together, and therefore the longitudinal bearing capacity of the bridge is enhanced.

The invention discloses an impermeable anti-skid exposed slope vegetation recovery matrix layer structure, and relates to the field of vegetation recovery field of the exposed slope. The structure orderly comprises a bottom isolating layer, a middle draining layer and a surface draining layer from bottom to top; the bottom isolating layer uses clay with granularity of 0.02 mm below as a base layer, the paving thickness is within 3 and 10 cm, and the permeability is 10-7 cm2/s below; the middle draining layer uses the coarse sand, gravel or macadam particle with granularity of 0.2-2.0 cm as the base layer, the paving thickness is within 5-20 cm, and the permeability is 10-2 cm2/s above; the surface draining layer uses a spray-seeding base material with rich nutrition and good water retention ability as the base layer, and the paving thickness is within 3-15 cm. The impermeable anti-skid exposed slope vegetation recovery matrix layer is applicable to the mine vegetation recovery, tailing heap sealing, treatment of refuse landfill surface, slope vegetation recovery of expressway, and vegetation recovery of other exposed slopes.

The present invention relates to a preference determination apparatus, an air conditioning control system, a preference determination method and an air conditioning control method for alleviating constraint for preference determination achievement, alleviating the burden of preference notification for the submitter, and reducing possibility of controlling unstability. A preference determination type air conditioning control apparatus provides a preference determination component, a control plan memory component for storing a control plan, for each of a temporary preference and a continuing preference, that has stipulated a rule for changing the control setting value of the air conditioning in response to said preference for air conditioning from a submitter, a control plan decision component for deciding the control plan that corresponds to the determination result of the preference determination apparatus, as the control plan to be implemented by air conditioning equipment, and equipment control component for controlling air conditioning equipment based on the control plan. The preference determination component provides an input means for receiving a preference for air conditioning from a submitter, and a determination processing means for determining, according to a notification count, whether the preference from the submitter is a temporary preference or a continuing preference.

The invention relates to a system and method for improving safety of wheels of a heavy multi-axle vehicle during steering jamming, the system comprises a data acquisition module, an ideal model calculation module, a steering wheel jamming judgment module and a vehicle motion control module, the data acquisition module is used for acquiring parameters of the whole vehicle, and then according to steering requirements and the parameters of the whole vehicle, the ideal model calculation module is used for calculating the steering wheel jamming; calculating an ideal wheel rotation angle, a lateral force, a longitudinal force and a yawing moment of each wheel during pure rolling through an ideal model calculation module; detecting an actual turning angle signal of a wheel through a steering wheel jamming judgment module, and comparing the actual turning angle signal with an ideal turning angle to judge whether the steering wheel is jammed or not; when the vehicle motion control module judges that the steering wheels are stuck, by controlling tire force and controlling lateral force, longitudinal force and yawing moment needed by steering of the whole vehicle, the path tracking capacity of the whole vehicle is improved, and the instability phenomenon caused when a steering shaft is stuck during steering of the whole vehicle is avoided. The system and the method are beneficial to improving the driving safety of the heavy multi-axle vehicle when the wheels are blocked during steering.