188 results about "Critical zone" patented technology

A cementitious product and method of modifying the properties of a low or medium density FRC product by providing a predetermined pore size distribution. The pore size distribution is obtained such that in critical zones of the distribution, the pore volume is substantially equivalent to or less than the pore volume in a respective critical zone of a conventional high density FRC product. The resultant material provides improved properties over conventional medium density FRC products, in particular improved freeze/thaw durability and/or improved workability.

One embodiment of the present invention provides a system that avoids locks by transactionally executing critical sections. During operation, the system receives a program which includes one or more critical sections which are protected by locks. Next, the system modifies the program so that the critical sections which are protected by locks are executed transactionally without acquiring locks associated with the critical sections. More specifically, the program is modified so that: (1) during transactional execution of a critical section, the program first determines if a lock associated with the critical section is held by another process and if so aborts the transactional execution; (2) if the transactional execution of the critical section completes without encountering an interfering data access from another process, the program commits changes made during the transactional execution and optionally resumes normal non-transactional execution of the program past the critical section; and (3) if an interfering data access from another process is encountered during transactional execution of the critical section, the program discards changes made during the transactional execution, and attempts to re-execute the critical section zero or more times.

Optimizing a plurality cell sites or sectors in a wireless network including receiving network data regarding a plurality of cell sites or sectors; determining a critical zone in which communication is degraded; determining best neighbor cell sites or sectors among the neighbor cell sites or sectors associated with the critical cell sites or sectors; determining if the critical cell sites or sectors in the critical zone have available resources for achieving a desired improvement in communications; determining if the best neighbor cell sites or sectors have available resources for achieving the desired improvement in communications; and altering wireless network parameters of the critical cell sites or sectors, or the best neighbor cells sites or sectors for achieving the desired improvement in communications. Altering wireless network parameters of the critical cell sites or sectors, or the best neighbor cell sites or sectors is performed continuously until the desired improvement in communications in the wireless network is achieved.

Provided are an interrupt on/off management apparatus and method for a multi-core processor having a plurality of central processing unit (CPU) cores. The interrupt on/off management apparatus manages the multi-core processor such that at least one of two or more CPU cores included in a target CPU set can execute an urgent interrupt. For example, the interrupt on/off management apparatus controls the movement of each CPU core from a critical section to a non-critical section such that at least one of the CPU cores is located in the non-critical section. The critical section may include an interrupt-disabled section or a kernel non-preemptible section, and the non-critical section may include an interrupt-enabled section or include both of the interrupt-enabled section and a kernel preemptible section.

A method, apparatus and program storage device for performing a return/rollback process for RCU-protected data structures is provided that includes checking a user-level state of a preempted thread having a RCU read-side critical section, and executing the critical section of the thread after preemption when the user-level state of the thread indicates execution, otherwise returning to a point of preemption, resuming execution of the thread and disabling checking the user-level state when the user-level state of the thread indicates return.

The invention provides a GPS (global position system) terminal-based map matching method for vehicle position tracking, which belongs to the field of map matching. According to the method, the problem of inaccurate vehicle positioning caused by GPS signal deviation can be solved, a vehicle is matched with the right position on the current running road, the distance between the vehicle and the current road destination node is calculated, when a GPS signal is invalid, the position of the vehicle can be reckoned, and the time that the vehicle reaches the node within the critical zone of the road destination node is calculated. Considering that the GPS terminal for operating a map matching program has limited resources, the method synthetically utilizes a weight-based map matching thought and a curve fitting-based map matching thought which have good real time and combines road-network topology information, and different projection algorithms can be selected according to the current position of the vehicle. By using the method, vehicle position information with accurate real time is provided, and according to the method, vehicle monitoring, real-time traffic information collection, vehicle navigation, etc can be realized.

A system and method is provided for delaying a priority boost of an execution thread. When a thread prepares to enter a critical section of code, such as when the thread utilizes a shared system resource, a user mode accessible data area is updated indicating that the thread is in a critical section and, if the kernel receives a preemption event, the priority boost that the thread should receive. If the kernel receives a preemption event before the thread finishes the critical section, the kernel applies the priority boost on behalf of the thread. Often, the thread will finish the critical section without having to have its priority actually boosted. If the thread does receive an actual priority boost then, after the critical section is finished, the kernel resets the thread's priority to a normal level.

The Surface Hold Advisor Using Critical Sections is a system and method for providing hold advisories to surface controllers to prevent gridlock and resolve crossing and merging conflicts among vehicles traversing a vertex-edge graph representing a surface traffic network on an airport surface. The Advisor performs pair-wise comparisons of current position and projected path of each vehicle with other surface vehicles to detect conflicts, determine critical sections, and provide hold advisories to traffic controllers recommending vehicles stop at entry points to protected zones around identified critical sections. A critical section defines a segment of the vertex-edge graph where vehicles are in crossing or merging or opposite direction gridlock contention. The Advisor detects critical sections without reference to scheduled, projected or required times along assigned vehicle paths, and generates hold advisories to prevent conflicts without requiring network path direction-of-movement rules and without requiring rerouting, rescheduling or other network optimization solutions.

An elevator installation with an elevator case, an elevator shaft, and a drive unit. The elevator cage is installed in the elevator shaft to be movable and is controllable by the drive unit so that the elevator cage can be stopped in different positions in the elevator shaft. The elevator shaft is equipped with a detecting device which detects whether a person is standing in a critical zone in the elevator shaft or is about to go into this. The detecting device is connected with the drive unit so that the elevator installation can be transferred to a special mode of operation in case a person is standing in the critical zone or is about to go into this. The drive unit includes special control equipment which in the special mode of operation stops the elevator cage before it moves into the critical zone. In that case the detecting device and the special control equipment are designed to be operationally safe in order to prevent movement of the elevator cage into the critical zone. The special control equipment enables, in the special mode of operation, an undisturbed operation of the elevator cage in a zone outside the critical zone.

The invention relates to two methods for accessing critical areas, wherein it comprises: presetting the write priority identifier to instruct if there is write process waiting; when CPU is ready to write data into critical area, if present critical area has read lock and the write priority identifier instructs there is not write process waiting, setting the write priority identifier as there is write process waiting; when the read lock is released, setting the write priority identifier as there is no write process waiting, and entering into critical area; when CPU is ready to read out data from critical area, and if the write priority identifier detects write process waiting, the write process has priority. The invention discloses two systems that access critical area, which comprises: CPU, read-write lock module and write priority identifier memory module. The invention can on time response the write operation of critical area, to meet high real time property of write operation in multi-core system.

Method, terminal, and storage medium for tracking facial critical area are provided. The method includes accessing a frame of image in a video file; obtaining coordinate frame data of a facial part in the image; determining initial coordinate frame data of a critical area in the facial part according to the coordinate frame data of the facial part; obtaining coordinate frame data of the critical area according to the initial coordinate frame data of the critical area in the facial part; accessing an adjacent next frame of image in the video file; obtaining initial coordinate frame data of the critical area in the facial part for the adjacent next frame of image by using the coordinate frame data of the critical area in the frame; and obtaining coordinate frame data of the critical area for the adjacent next frame of image according to the initial coordinate frame data thereof.

A cooling, heating and power system (10) includes a prime mover (12) for producing electricity having a thermal output (18) and an electrical output (20) coupled to an absorption chiller (24). A part-load, active, redundant chiller (26) is thermally coupled to the absorption chiller (24) for receiving a cooling-heating fluid from the absorption chiller (24). The part-load chiller (26) operates at maximum efficiency at between about forty percent and about sixty percent of a maximum cooling load of the chiller (26) to thereby generate large volumes of cooling very efficiently. The system (10) may direct the cooling into a multi-zone cooling-heating circuit (40) including a critical zone (42) and a utility zone (44) thermally coupled to the chiller (26) for selectively delivering the cooling-heating fluid to at least one of the critical zone (42) and the utility zone (44) of the circuit (40).

A method and apparatus for detecting lock instructions and lock release instruction, as well as predicting critical sections is herein described. A lock instruction is detected with detection logic, which potentially resides in decode logic. A lock instruction entry associated with the lock instruction is stored/created. Address locations and values to be written to those address location of subsequent potential lock release instruction are compared to the address loaded from by the lock instruction and the value load by the lock instruction. If the addresses and values match, it is determined that the lock release instruction matches the lock instruction. A prediction entry stores a reference to the lock instruction, such as a last instruction pointer (LIP), and an associated value to represent the lock instruction is to be elided upon subsequent detection, if it is determined that the lock release instruction matches the lock instruction.

A cooled constructional element for a gas turbine includes a wall having a front and a rear side. The front side is configured to be thermally loaded during operation of the turbine, and the rear side has a plurality of pins projecting therefrom in a two-dimensional distribution, the two-dimensional distribution including a higher density distribution of pins in a critical zone of the cooled constructional element than in the remaining regions of the cooled constructional element. A device is configured to create jets of a cooling medium that are directed onto the rear side of the wall in a region of the plurality of pins so as to cool the rear side of the wall by impingement.