72 results about "Pseudo static" patented technology

For a pseudo-SRAM (Static Random Access Memory) macro operating in synchronization with a clock signal, a page operation instructing signal instructing a page operation and a page close instructing signal instructing completion of the page operation are prepared as control signals designating operation modes. A pseudo-SRAM can be selectively operated in a page mode in accordance with the page operation instructing signal and the page close instructing signal, and an operation of row-related circuitry in each clock cycle can be inhibited so that an average power consumption can be reduced. The power consumption of the pseudo-SRAM can be reduced without lowering an operation speed.

A method and apparatus for laser-assisted fault mapping which synchronizes the laser control with the tester unit. The inventive method provides for laser-assisted pseudo-static fault mapping to localize defects in a device whose inputs are being stimulated dynamically by a tester. It further provides for laser-assisted dynamic soft error mapping, to localize in terms of location and to correlate with respect to a specific test vector, sensitive areas in a device by utilizing device performance criteria such as pass-fail status outputs. The apparatus includes a fully controllable dynamic laser stimulation apparatus connected to a control unit that provides complete synchronization with a tester unit.

A latency control circuit for use in a semiconductor memory device includes a precharge unit for outputting a precharge reset signal based on a refresh signal and a normal active signal, wherein the precharge reset signal is used for extending a latency during a burst read period which includes a refresh cycle; a refresh cycle detector for detecting the refresh cycle in response to a latency setting signal and the precharge reset signal to thereby output a latency extension signal; a latency decoder for decoding an external address to thereby output a plurality of preliminary latency signals; and a latency controller for outputting a plurality of latency signals in response to the preliminary latency signal and the latency extension signal.

The invention discloses a pseudo-static test device which comprises a reaction wall (1) and a gate-type reaction frame (2). A main beam (3) of the gate-type reaction frame (2) is vertical to the wall surface of the reaction wall (1); the upper end of a vertical actuator (4) is connected with the main beam (3) through a spherical hinge (5), and the lower end is pressed on a distribution beam (9) parallel with the main beam (3). The pseudo-static test device also comprises an H-shaped steel beam (10), a water sac (11) and a columnar member to be tested (13) which are arranged under the distribution beam (9) in sequence. Two bending supports (7) are arranged under the columnar member to be tested (13) close to the two ends respectively. The pseudo-static test device also comprises an anchor rod (12), a steel baffle plate (14) and a horizontal actuator (6). One end of the anchor rod (12) passes through the steel baffle plate (14), and the other end is connected to a vertical channel in the reaction wall (1) through a bolt. The pseudo-static test device can test resistance-displacement full curves of beams and columns and the like under the combined actions of transverse uniform distribution load and axial force two loads.

According to the real-time non-tracking monitoring video remnant detection method provided by the invention, manual feature extraction and deep learning recognition are combined, and non-tracking remnant detection is realized. The method comprises the following steps: firstly, on the basis of a frame difference method, counting continuous frame sequence change conditions of a foreground region toobtain an initial static target region; Then, we will make Two kinds of manual design characteristics of a gradient direction straight directional diagram and hue- Saturation-lightness combineto carryout suspicious object pre-judgment, and a pseudo static target area caused by influences of illumination changes and the like is eliminated. And finally, known objects and pedestrians are excluded bycombining a deep learning technology, so that final confirmation is carried out on suspicious objects, and non-tracking detection of the remaining objects is realized. According to the method, pseudotargets generated by illumination change and pedestrian retention in a scene can be eliminated, remaining objects can be accurately detected, the single-frame processing time is shorter than that ofother two methods, and the requirement for real-time alarming can be met.

The invention discloses a large soil-underground structure pseudo-static test device and method. The device comprises a bottom plate, a rectangular laminar shearing box body, a lateral limiting framework, a horizontal loading system and a vertical loading system, wherein the rectangular laminar shearing box body comprises a rectangular steel framework and interlaminar rollers; the lateral limiting framework comprises steel stand columns, lateral universal rollers and tie bars; the horizontal loading system comprises horizontal actuators; the vertical loading system comprises vertical actuators, loading plates, top universal rollers and a top pressure-bearing steel plate. The vertical actuators apply vertical loads to the surface of a soil mass uniformly through the loading plate, the top universal rollers and the top pressure-bearing steel plates, and the rectangular laminar shearing box body generates horizontal displacement in a certain distribution form step by step by performing synchronous coordinate control on the horizontal loading system until an underground structure is damaged. The limit that the reduced scale in a test of a traditional underground structure anti-seismic model is small is eliminated, and the anti-seismic property of the underground structure under different vertical seismic motion is researched.

A memory device for a mobile communication device. The device includes a pseudo static random access memory (PSRAM), a NAND flash memory, an interface controller and a NOR flash memory. When the mobile communication device is powered on, the microprocessor downloads a system program to the PSRAM from the NAND flash memory and shows a startup icon on a display unit according to an initial program, executing the downloaded system program in the PSRAM to accomplish startup of the mobile communication device.

The invention discloses a screening method and system of a pseudo-static URL (Uniform Resource Locator) and a webpage crawling method and system. The screening method comprises the following steps: obtaining a URL list to be detected; reading a URL regular list, and establishing a database; reading one URL to be matched with regular expressions one by one; classifying the URLs in the database according to paths; comparing the parameters and the values of the selected URL and the same-path URL to determine whether a zone bit is arranged or not; according to the similarity of the URL and the similarity of a webpage structure, determining whether the zone bit is arranged or not; and storing the URL into the database. The automatic identification of the pseudo-static URL is realized by a pseudo-static technology which is used by aiming at a website so as to filter a great quantity of repeated and useless pseudo-static URLs and extract the valuable URLs for safety detection, and crawling efficiency and crawling accuracy are improved.

The invention relates to the technical field of experiments and tests, and discloses a novel displacement sensor transformation and amplification device which comprises a base. A transformation clinohedral is arranged on the base in a sliding mode, a horizontal displacement meter is arranged on the base, and the horizontal displacement meter is in butt joint with the vertical face of the transformation clinohedral. The device further comprises a vertical pointer, and the vertical pointer is in sliding connection with the inclined face of the transformation clinohedral. According to a transformation device body, vertical displacement can be transformed into horizontal displacement in an equivalent mode, and according to an amplification device body, the ratio of different end heights to the horizontal projection length of the inclined face can be set to adjust amplification factors. The device can be used for pseudo-static tests of supports and other test pieces with the small height or quite small vertical deformation, can be used for pseudo-dynamic tests, seismic modeling tests and static tests, and is wide in application range and high in practicality. The device can be directly mounted on the periphery of the supports and the other test pieces, the vertical pointer and the base of the device are connected with an upper bottom plate and a lower bottom plate of equipment respectively through bolts or magnets, and the device can be used repeatedly.

The invention discloses a static gantry and a pseudo-static seismic testing device, which relate to the technical field of seismic testing. The static gantry is used to fix a testing piece to a testing area having a reaction wall, and comprises a gantry base, a testing piece fixing assembly, and a gantry base fixing assembly. The gantry base comprises a base horizontal fixing portion and a testingpiece fixing portion. The base horizontal fixing portion is located at the end of the gantry base. The gantry base fixing assembly comprises a first fixing assembly which matches with the base horizontal fixing portion to fixedly connect the gantry base and the reaction wall. The testing piece fixing assembly can fix the testing piece to the testing piece fixing portion. The static gantry is reasonable in design and firm in fixing, can provide a flat field for the testing piece, and ensures the requirement of providing an embedded end for the testing piece. The static gantry can also be usedas a gantry with an expandable function, and has strong practicability.

A transmitter and a receiver are both initially assigned a starting time slot from a plurality of active time slots in a superframe structure. A controller sends instructions to the transmitter and receiver during a first superframe. These instruct the transmitter to transmit signals during an ending time slot in one or more unused time intervals in the superframes. If the transmitter receives these instructions, it immediately begins transmitting in the ending time slot. If the receiver receives the instructions, it listens for the signals during both the starting active time slot and the ending active time slot for a set number of consecutive superframes after the first superframe. If the receiver does not receive the instructions, it listens for the signals during the entire superframe until it hears instructions in a new superframe. If the transmitter misses more than the set number of superframes, it stops transmitting.

Communication nodes for use with a wireless ad-hoc communication network are disclosed. In an embodiment of the present invention, the communication node comprises a transducer, which generates a signal in response to an external signal. The ad-hoc network communication is supported in part by static communication nodes, which defined an organized infrastructure network in order to achieve the various functions of the transducers. In another embodiment, the communication node for use with a wireless ad-hoc network does not include a transducer. Such communication nodes are preferred for use with a less structured network with virtually no infrastructure and allow for being used with expanding and contracting networks. Mobile communication nodes mostly support the propagation of signals. However, pseudo-static or static communication nodes are also used in wireless communication ad-hoc networks.

The present invention relates to the field of railway bridge detection, in particular to a a light pier railway bridge lateral displacement measurement method. The method comprises following steps: decomposing lateral total displacement into a high frequency dynamic displacement component and a low frequency pseudo-static displacement component, with one being accelerated velocity data in a vibration direction, and then using a finite impulse response filter to measure the dynamic displacement component; using the accelerated velocity of a vertical direction and the vibration direction measured by two accelerometers, obtains a pseudo-static tilt angle through attenuating the dynamic component by a simple momentum average filter, and then converting a low frequency dip angle data into the pseudo-static displacement component by using deflection and a rotation angle formula of a cantilever pier end; finally superimposing the dynamic displacement component and the pseudo-static displacement component, to obtain the lateral total displacement. The method mainly comprises measuring the high frequency dynamic displacement component and the low frequency pseudo-static displacement component, and can measure the light pier railway bridge lateral displacement, detect state of the railway bridge, and control safe transportation of the railway without setting a reference point.

The invention relates to a P-Y curve measuring device for a pseudo-static test on pile-soil interaction. The P-Y curve measuring device comprises a carrying pile body which is embedded into a test soil body in a model box, wherein a plain round bar perpendicular to the axis of the carrying pile body is connected to each test section of the carrying pile body; one end of each plain round bar is fixedly connected with the carrying pile body, and the other end of each plain round bar penetrates through the side wall of the model box and then is perpendicularly connected with a surface-smooth glass sheet; each glass sheet is perpendicularly connected with a displacement meter which is used for measuring the displacement of the carrying pile body. The P-Y curve measuring device has the beneficial effects that each plain round bar is nested in a PVC (Polyvinyl Chloride) pipe and is connected with the corresponding displacement meter on the same horizontal plane, so that interference to a measurement result caused by the soil body can be eliminated to the greatest extent; the PVC pipes are lubricated through a butter lubricant, so that the influence on the displacement of the pile body is eliminated; each plain round bar is connected with the corresponding displacement meter through the corresponding surface-smooth glass sheet, so that measurement is facilitated.

The invention relates to a data refresh method of the pseudo-static RAM. Firstly, one address in serial and one refresh signal are supplied. The address serial is used as the reference of the data read-write position. Secondly, one word line opening time of the pseudo-static RAM whose longest time is one half of the period of the refresh signal is set at not less than one address of the address serial. Finally, the refresh is made at the word line closing time, and the read and write are made at word line opening time of the address. If the word line is closed while doing write in, the write in action is delayed to the next ATD signal high level.

A method and device for hiding refresh operations during accesses to sub-arrays of a pseudo-static memory device. By refreshing sub-array_j while filling the row R_i (where i≠j) corresponding to sub-array_i, refresh operations can be performed without risking that a read request will interrupt the refresh operation. Additional refresh operations of sub-array_i can be performed serially with the operations of filling the row R_i without delaying the overall burst read or write operation if the burst is made sufficiently long.

The invention provides a pseudo-static memory. The pseudo-static memory comprises a first register set, a second register set, a write operation buffer, a write operation flag register, a comparator and a control circuit, wherein the comparator is used for comparing a memory set address which the current write operation aims at with a memory set address in the second register set and outputting comparison result signals; the control circuit comprises a first control submodule; and the first control submodule is used for writing data in the first register set into the write operation buffer and executing the refresh operation when the write operation conflicts with the refresh operation in the current time period, setting a write state signal of the write operation flag register as a valid identification signal when the write state signal of the write operation flag register is an invalid identification signal, and writing data in the second register set into the appointed memory set when the write state signal of the write operation flag register is the valid identification signal and the comparator outputs the comparison result signals with different addresses. The pseudo-static memory can increase the access speed of a pseudo static random access memory (SRAM) so as to improve the working efficiency of the pseudo SRAM.

A system for capturing the movements of a body having substantially rigid segments articulated together includes attitude units fastened onto the segments of the body, the units each including at least one accelerometer and one magnetometer, and a reduced number of gyroscopes. The system also includes a pseudo-static state detection module and a module for calculating pseudo-static angles. When all segments are detected in a pseudo-static state, the state vector is provided by the module for calculating pseudo-static angles. When a segment is detected in a dynamic state, the state vector is provided at the output of a Kalman filter.