126 results about "Path condition" patented technology

The dynamic streaming of multimedia data between a data server and one or more clients is disclosed. Dynamic streaming enables the rapid and accurate characterization of the end-to-end path conditions in a server-client streaming session, as well as the rapid and intelligent response to those conditions in terms of source compression prior to data packetization. The most significant bits of an original bit stream can be adaptively and immediately selected in response to network conditions. The adaptive selection process is informed by feedback from the client receiver indicative of a time-to-transit the network from server to client. A control protocol and server architecture, including file format, data structure, data processing procedures, cache control mechanisms, and adaptation algorithms useful in implementing dynamic streaming are also disclosed.

An adaptive modulation transmission system is disclosed that is capable of assigning a combination of a modulation parameter and a code multiplicity according to a user requirement and a propagation path condition between a transmission device and a reception device. The transmission device includes a signal modulation unit to modulate data according to the modulation parameter, a code multiplexing unit to perform code multiplexing according to the code multiplicity, a code multiplexing controller to select the code multiplicity according to the required amount of transmission data, and an adaptive modulation controller. The adaptive modulation controller sets a threshold of the propagation path quality to define a region to which a combination of the modulation parameter and the code multiplicity is applicable, selects the combination of the modulation parameter and the code multiplicity based on a comparison result of the threshold and measured propagation path quality, and outputs the selected modulation parameter to the signal modulation unit.

One embodiment of the present invention provides a system for updating link-status information associated with a prefix in an information-centric network (ICN). During operation, a first node in the ICN receives a link-state advertisement (LSA) message from a neighbor node with the LSA message specifying a prefix and an anchor node advertising the specified prefix. The system determines, based on topology information stored on the first node, whether a shortest-path condition is met, and forwards the received LSA message to other neighbors of the first node in response to the shortest-path condition being met.

A method and apparatus for applications of identification of variations of propagation path to transmit diversity control. Transmit diversity parameters may be modified according to detected dynamics, which may, for example, be related to changes in actual propagation and network conditions. Such dynamics may be referred to as mobility parameters. Mobility parameters may apply to variability in a propagation path due to any conditions. Determination of a mobility parameter may be conducted using one or more of multiple parameters available to the mobile terminal. Such feedback information indication, which is related to the propagation path conditions, may be provided to the apparatus, which would attempt to find a more desired mode of operation, which may lead to reduction in power and the improvement of the quality of transmission.

An optical transmission apparatus implemented as an OADM (Optical Add / Drop Multiplexer) includes quality monitors each for monitoring the quality of a signal arriving on a particular optical transmission path. A monitor / control unit converts quality signals output from the quality monitors to path-by-path bit error rates, or estimation values, and compares them to select a route. The monitor / control unit then generates a metric value "1" for the route selected and adds it to one of identical metric values, which are assigned to routes to the same destination, that corresponds to the route selected. The monitor / control unit can therefore select a route closer to actual transmission path conditions. A method of determining an optimal route for optical transfer is also disclosed.

A radio transmission apparatus capable of further improving the frequency use efficiency and the transmission speed while maintaining the communication quality. In this apparatus, switching is performed according to the transmission path condition between the followings: transmitting different information transmission signal A <> transmission signal B with an identical frequency from a plurality of antennas 106, 116 space multiplexing, transmitting different information transmission signal A <> transmission signal B with different frequencies from the plurality of antennas 106, 116 frequency multiplexing, transmitting identical information transmission signal A = transmission signal B with an identical frequency from the plurality of antennas 106, 116 space diversity, and transmitting identical information transmission signal A = transmission signal B with different frequencies from the plurality of antennas 106, 116 frequency diversity.

The invention discloses a testing device and a testing device method for simulating collapse of tunnel surrounding rock under conditions of rainfall and underground water seepage. The testing device comprises a model testing box, a rainfall adjustable simulating system, an underground water seepage simulating system, an underground water supplying system, a water content testing system, a stress monitoring system, a digital radiography noncontact measuring system and an optical fiber bragg grating displacement monitoring system. By simulating a progressive failure process of tunnel weak broken surrounding rock under the action of seepage of surface water and underground water, mechanical behaviors of crushing the surrounding rock under different rainfall conditions and different underground water seepage path conditions are quantitatively researched. By obtaining multiple-physical field information in a tunnel surrounding rock collapse process, multi-information features in different evolutionary phases and internal links of information of all fields of the collapse are analyzed, a progressive failure process and fracture morphology and ranges of the tunnel weak broken surrounding rock under different factors are determined, and the effective basis is provided for disclosing a progressive failure principle and a dynamic pressure arch effect of the weak broken surrounding rock under conditions of rainfall and underground water seepage.

A base station, a mobile station, a radio communications system, and a radio transmission method are disclosed. The base station includes a control information determining unit configured to determine control information that includes a spreading factor, the number of chip repetitions, and a phase unique to the mobile station, based on at least one of information about the type of cell environments in which the mobile station is present, information about the number of mobile stations that are present in the cell, information about information rate required by the mobile station, information about a type of traffic, information about a radio parameter of the mobile station, information about a propagation path condition, and information about interference from an adjacent cell, and configured to transmit the spreading factor, the number of chip repetitions, and the unique phase of the mobile station that is determined to the mobile station.

There is provided a communication device for selecting an optimal modulation method even when a propagation path condition is changed, thereby improving the transmission efficiency. In this device, a second communication device (200) has a transmission path condition estimation unit (210) for estimating the propagation path condition change speed in a communication path from the first communication device (100) and a communication quality estimation unit (220) for modifying the communication quality estimation method according to the speed of the change of the propagation path condition and estimating the communication quality according to the modified estimation method. The information on the estimated propagation path condition and the information on the communication quality are transmitted from a transmission processing unit (202) and received by a first communication device (100). In the first communication device (100), an adaptive modulation control unit (110) sets a condition for selecting the modulation method of the signal to be transmitted to the second communication device (200) from a plurality of modulation methods and decides the modulation method according to the set condition and the information on the communication quality.

The present invention discloses a robot scheduling method, a robot scheduling device and a computer readable storage medium and belongs to the computer technical field. The method includes the following steps that: path condition information in a warehouse is acquired; goods picking time of robots is calculated according to the positions of the robots and the path condition information; and a robot for executing a goods picking task is determined according to the goods picking time of the robots. When the robot scheduling method of the invention is adopted to schedule the robots, the goods picking time of the robots is calculated according to the positions of the robots and the path condition information in the warehouse, and the robot for executing the goods picking task is determined according to the goods picking time, and therefore, the robots are not scheduled only based on distances any more, a condition that a robot which is located at a short distance while needs long goods picking time is selected to execute a goods picking task can be avoided, and goods picking efficiency can be improved.

The invention provides a mixed interconnection Mesh topological structure for an on-chip network and a routing algorithm of the mixed interconnection Mesh topological structure. Path conditions are preset for data packages; whether data in a buffer area of an input port of a next-level routing node exceed a preset proportional value is judged through a current routing node according to a preset path firstly, and if the data do not exceed the preset proportional value, the data are transmitted along a path selected in advance; if the data exceed the preset proportional value and the storage content of buffer area data of corresponding input ports of two adjacent routing nodes meeting the requirements of the minimum path is not full, the routing node corresponding to fewer buffer area data packages of the input port is selected as a next-level routing node; if the buffer areas of the corresponding input ports are all full, transmission is carried out by sharing bus. Due to the fact that an HPA routing algorithm can be transmitted through a bus during network congestion, the deadlock phenomenon cannot occur; because the routing algorithm belongs to minimum path algorithms, the livelock phenomenon cannot occur; the data packages of all nodes are equally positional in the transmission process, and the starvation phenomenon cannot occur.

A communications system has a transmission apparatus for transmitting a signal and a reception apparatus for receiving the signal. The reception apparatus includes: a transmission mode table; a propagation path condition detecting block; a transmission mode extraction block; a threshold adjustment block; and a transmission mode proposal block.

A projection screen with holographic cylindrical surface lens consists of screen body, Fresnel lens layer and holographic cylindrical surface lens array layer. It is featured as attaching speckle information structure on said lens array layer, obtaining speckle information structure by utilizing an outgoing light via holographic cylindrical surface lens and speckle screen as object light to interference with reference light to form image then using light path condition made by speckle information structure to limit said lens array layer and said speckle information structure.

The invention discloses a g2o-based SLAM rear end optimization algorithm method, pose node information of a robot is used as input data, a weight factor is added for each edge by focusing closed loop restriction with a rear end optimization algorithm, a value of the weight factor is obtained according to a mathematic relation between the derived weight factor and an information matrix, and after the read end optimization algorithm, the pose node information of the robot is corrected; a built-in optimization strategy of g2o is further optimized based on a g2o platform by a least square method, and a post node path more according with an actual path condition is constructed. The g2o-based SLAM rear end optimization algorithm method adopts a DCSI algorithm, and is used for solving the problem of robutness rear end optimization, complexity is reduced, operation time is reduced and the rate of convergence rate is improved. The g2o-based SLAM rear end optimization algorithm method has important meaning in correction and optimization of a topological map in an unknown environment.

A method for pairing user terminals in the MU-MIMO system comprises: a base station sets pairing parameters; the base station receives report information of a user terminal, and sets parameter identifiers according to the set pairing parameters and the report information; and after determining that the user terminal which reported the report information is a user terminal to be paired, the base station determines a user terminal paired with the user terminal to be paired according to the set parameter identifiers. A device for pairing user terminals in the MU-MIMO system comprises a parameter setting unit, a parameter identifier setting unit and a pairing performing unit. Under the precondition of considering the path loss condition of the user terminals, the present invention combines with the path condition of the user terminals to pair the user terminals, which can relieve the influences of the interference on the pairing result to a certain extent, and improve the performance of the MU-MIMO system.

A device and a method are provided to automatically generate test case for embedded software. This invention is in software test field, including symbolic execution kernel module, path selection module, solver, debugger, concrete execution kernel module and debugger agent module. The tested software and test cases are uploaded from the host system to the embedded system through debugger and debugger agent. The concrete execution kernel module starts the tested software. The symbolic execution kernel module captures the run-time information of the tested software through the debugger. When the tested software operates on the symbol source, the symbolic execution kernel module marks the symbol source, tracks the symbol propagation, generates path condition and sends the path condition to path selection module. This invention can automatically generate test cases for embedded software, which doesn't need the source code of the tested software and can be conveniently used for commercial software.

A conditional breakpoint for debugging computer programming code includes a condition identifying of one or more expected code paths used to reach the breakpoint. The breakpoint is triggered if it is reached during execution using an unexpected code path. Preferably, an expected code path is identified by specifying the expected preceding breakpoint, by specifying basic code blocks which should or should not be encountered before the breakpoint, or some combination thereof. The expected code path condition may be used alone or in conjunction with any conventional breakpoint condition.

Disclosed is a packet receiving apparatus in a communication system for transmitting a packet signal upon changing over a parameter of a transmit signal in accordance with conditions of a propagation path, and, when the packet signal cannot be received correctly on a receiving side, retransmitting the packet signal, combining the packet data received previously and the retransmitted packet data and executing decode processing based upon the combined packet data. The receiving apparatus is such that if the propagation path conditions at the time of retransmission are inferior, part of the packet data extracted from a buffer is cut out and combined with a retransmission packet and decode processing is executed based upon the result of combining. If the propagation path conditions at the time of retransmission are superior, data of a plurality of packets to undergo retransmission combining is extracted from the buffer, the extracted data is combined with part of a retransmission packet and decode processing is executed based upon the result of combining.

The invention relates to an energy management strategy of a hybrid power bullet train set traction and transmission system. The energy management strategy comprises the following steps of: step (1), estimating train power demand; determining an operation path condition and an operation working condition of a train and calculating a real-time power instruction of the traction and transmission system; step (2), obtaining the state of each subsystem through communication; obtaining the state of each subsystem of the traction and transmission system through hard wire communication and / or RS485 communication and / or CAN (Controller Area Network) bus communication, wherein the state at least comprises a charge state of an energy storage device and maximum available power of a power pack; and step (3), controlling the energy flow between the subsystems according to the operation path condition of the train. According to the energy management strategy, a bullet train set can be normally operated under two operation conditions of having a contact network or not; on the basis, the optimal acceleration performance, the optimal fuel economy performance and the maximum energy cyclic utilization of the bullet train set can also be guaranteed.

A data transfer device includes a serial interface including plural transmission paths and carrying out a data transfer operation with plural operating frequencies, transfer requesting units issuing a data transfer request to the serial interface, a request monitoring unit, a condition setting unit setting a set transmission path condition including at least one of a number of the transmission paths and an operating frequency used when the data transfer requests are issued to switch statuses of the data transfer requests to statuses of switching data transfer requests, a use transmission path condition determining unit determining the set transmission path condition corresponding to the status of the switching data transfer request as a use transmission path condition when the status of switching data transfer request corresponds to the status of data transfer request by comparing the statuses, and a switching unit switching to the use transmission path condition.

The invention discloses a method and device expanding a user relationship chain, and belongs to the field of Internet communication. The method comprises the following steps: acquiring a second user account wherein the path of the second user account and a first user account meets a pre-arranged path condition, and indirect friend relation exists between the first user account and the second user account in a topological subgraph of a social network; acquiring the path feature information of the path between the first user account and the second user account; structuring characteristic vector according to the path feature information of the path between the first user account and the second user account; forecasting the acquaintance probability between a first user corresponding to the first user account and a second user corresponding to the second user account according to the characteristic vector; selecting the second user of which the acquaintance probability to the first user meets a pre-arranged recommendation condition; recommending the second user account corresponding to the selected second user to the first user. According to the invention, the liveness and persistence rate of the social network can be improved.

A vehicle control apparatus includes an accelerator-state detecting section configured to detect an accelerator manipulating state of a driver; a traveling-path-condition detecting section configured to detect a condition of a traveling path of a host vehicle; a brake control section configured to cause the host vehicle to automatically generate a braking force; and a control unit configured to control the brake control section on the basis of an input from the accelerator-state detecting section. The control unit is configured to actuate the brake control section in a case where the accelerator-state detecting section detects a decrease of a manipulated variable of the accelerator or an off-state of the accelerator and also where the traveling-path-condition detecting section detects a target object for speed reduction on the traveling path.

Embodiments in accordance with the invention can include a new method (500) and system (100) for testing code within a speech application. A test file (101) can be automatically generated to verify the functionality of a new section of code (172) presented within a graphical call flow builder application (156). In one arrangement, a user can specify through a wizard two points on a path identifying the code section to be tested. The wizard can generate a test file (101) and can configure a path (151) to a new subpath (152) and automatically assign predetermined values to graphical call flow prompts along the path. In this manner, the new code section is reached under the same path conditions for allowing repeatable testing. The system can include a test harness (110) configured to test a new code section from within a context of the speech application, and a test controller (120) for transitioning to the new code section. The test controller can run the test harness within the speech application to evaluate a functionality of the new code section.

The invention discloses a patch security detecting method and system for software update.The method comprises the steps that by means of conducting preprocessing on patches, intermediate code analysis is conducted to obtain basic blocks affected by the patches, memory sensitive functions and variables thereof are obtained by means of the basic blocks affected by the patches, and a main execution path is constructed by starting from the memory sensitive functions; in the process of conducting symbolic execution on the path, the specific path condition is determined, and when the specific memory sensitive function is reached, the path condition at this time is combined with a corresponding security detector to judge whether a software update security problem exists or not.The patch security detecting method and system for the software update focus on detecting the security of different parts, relative to an older version, of the new version after software is updated, the problems that in an existing patch security detection scheme, the false positive rate and false negative rate are high, the efficiency is low due to duplicate detection, and overdependence on test set effectiveness exists are solved, the detection efficiency is significantly improved, and the accuracy of patch security detection is further improved.

A segmented symbolic execution device and its working method, the device is equipped with: language translation, instruction pointer, instruction parsing and symbolic executor, symbolic object, symbolic memory, internal state, constraint solver and actual execution process control and interaction Modules such as controllers, using the PYTE language and a virtual machine capable of parsing the language, support symbolic execution of programs with complex data types and call relationships; and during symbolic execution, divide the IO attributes of function parameters and segment the program to ease The path explosion reduces the correlation between the symbolic execution time of a large program and its scale to a proportional correlation; it also avoids inaccurate results of symbolic segmental execution by combining actual execution; and solves the constraints on the path conditions in actual execution, and judges Whether it meets the execution conditions, improves the coverage of path traversal, and the accuracy of program analysis and test results, making the symbolic execution technology for large programs practical in the actual system operating environment.

To achieve a wireless communication apparatus capable of lowering power consumption for a digital signal processing of a transmitter in response to a transmission path condition.A wireless communication system performs communication by digital transmission or analog transmission of a signal processed by a digital signal processing unit in a transmitting section on a transmission side toward a reception side through a line, wherein a transmission path condition of the line is measured on the reception side, the transmission path condition is transmitted to the transmission side using a reverse line with respect to the above described line, and a bit width for signal processing of digital signal processing units such as a modulating unit and a digital / analog converting unit is varied by a bit width selecting unit in response to the transmission path condition of the line notified by the reverse line on the transmission side.

The present invention provides a software testing data amplification method, which is targeted at the problem that it is difficult for an original testing data set to meet the demand of new-version software testing. The method comprises: firstly, analyzing a code of a new-version program, and extracting all paths and path conditions of a to-be-tested program; then determining a traversing path of original testing data according to the path conditions, and constructing a similar matrix with a target path that the new-version program needs to cover, and selecting appropriate testing data in the original testing data as an initial evolving population according to the similar matrix; and finally, according to the traversing path of the original testing data and input components corresponding to different sub-path nodes of the target path, determining a position where an adaptive particle swarm algorithm operates an evolving individual, so as to generate new testing data. According to the method provided by the present invention, software testing data amplification is performed by combining a white-box testing technology with the adaptive particle swarm algorithm, so that relatively high efficiency and stability are achieved in the aspect of amplification of a testing data set.

Before start of streaming, a server apparatus obtains from client apparatuses their respective numbers of antenna combinations, determines a training time t1 according to the maximum of the numbers of antenna combinations, and notifies the client apparatuses of the training time t1. Each client apparatus determines a training time t2 required to estimate transmission path conditions for one antenna combination, based on the training time t1. The server apparatus transmits a training signal during the training time t1. Each client apparatus estimates transmission path conditions using the training signal during the training time t2 for each antenna combination, and selects and sets an antenna combination based on the estimated transmission path conditions.