182results about How to "No performance loss" patented technology

A device includes a converged input / output controller that includes a physical target storage media controller, a physical network interface controller and a gateway between the storage media controller and the network interface controller, wherein gateway provides a direct connection for storage traffic and network traffic between the storage media controller and the network interface controller.

A data center path switch architecture permits path switching of the signal path of incoming signals to one or more output paths in real time without the need for manual intervention, and without delays associated with current data center network switches. In this architecture, a switching core capable of switching signals directly from the ingress of the switching core to alternate destination ports in real time, either under software or hardware control.

Systems and methods are described for HF radar frequency sharing with GPS time modulation multiplexing. A method is provided that includes generating clock signals from the time information contained in a GPS signal. Radio frequency signals are transmitted and received in a sequence whose start times are dictated by the clock signals. The clock signals also control the modulation of the radio frequency signals. The radio frequency signals are modulated by using a sweep modulation. An apparatus to implement the method includes a GPS receiver, a state machine, a clock generator, a microprocessor, a memory chip, a signal synthesizer, and a digital data output device. The GPS receiver extracts time information from GPS signals. The state machine controls radar functions versus time. The microprocessor performs modulation multiplexing on radar signals.

An anti-theft system for protecting a vehicle exhaust component (4) is described. The system includes a sensor (1) configured to monitor vibrations associated with a vehicle exhaust system (5)and a controller (2) arranged to monitor a signal from the sensor (1). The controller (2) is configured to generate an alarm event if the signal from the sensor includes characteristics indicative of vibrations associated with an attempted theft of the vehicle exhaust component (4).

A system for digital signal processing, configured as a system on chip (SoC), combines a microprocessor core and digital signal processor (DSP) core with floating-point data processing capability. The DSP core can perform operations on floating-point data in a complex domain and is capable of producing real and imaginary arithmetic results simultaneously. This capability allows a single-cycle execution of, for example, FFT butterflies, complex domain simultaneous addition and subtraction, complex multiply accumulate (MULACC), and real domain dual multiply-accumulators (MACs). The SoC may be programmed entirely from a microprocessor programming interface, using calls from a DSP library to execute DSP functions. The cores may also be programmed separately. Capability for programming and simulating the entire SoC are provided by a separate programming environment. The SoC may have heterogeneous processing cores in which either processing core may act as master or slave, or both cores may operate simultaneously and independently.

A method of communication of data in a mobile telecommunications network involves at a transmitter first grouping the data into a first sequence of bits and a second sequence of bits. There is then a step of modulating a signal with the bits of the first sequence so that the bits of the first sequence have a first level of communication error protection provided by the modulation and with the bits of the second sequence so that the bits of the second sequence have a second level of communication error protection provided by the modulation less than the first level of communication error protection. The signal is then transmitted. At a receiver, estimates of the bits of the first sequence from the signal are detected and contributions to the signal corresponding to the estimates are determined and cancelled from the signal so as to produce a modified signal. Estimates of the bits of the second sequence are then detected from the modified signal.

The invention discloses a single-table multi-column sequence storage method for a column database. The column database comprises a plurality of data tables formed by rows and columns, wherein the data tables are divided into a plurality of column sets, and the column set comprises one or more columns; and a union set of the column sets forms the data table, and a connection index is established between every two column sets and records the one-to-one corresponding relationship of storage positions of the columns of the same tuple belonging to the data table in the two column sets between which the connection index is established. The single-table multi-column sequence storage method provided by the invention can improve the query efficiency of the column database, and reduces the storage space.

A system for digital signal processing, configured as a system on chip (SoC), combines a microprocessor core and digital signal processor (DSP) core with floating-point data processing capability. The DSP core can perform operations on floating-point data in a complex domain and is capable of producing real and imaginary arithmetic results simultaneously. This capability allows a single-cycle execution of, for example, FFT butterflies, complex domain simultaneous addition and subtraction, complex multiply accumulate (MULACC), and real domain dual multiply-accumulators (MACs). The SoC may be programmed entirely from a microprocessor programming interface, using calls from a DSP library to execute DSP functions. The cores may also be programmed separately. Capability for programming and simulating the entire SoC are provided by a separate programming environment. The SoC may have heterogeneous processing cores in which either processing core may act as master or slave, or both cores may operate simultaneously and independently.

An integrated circuit (IC) including unit power control, leakage reduction circuit for controllably reducing leakage power with reduced LdI / dt noise in the IC and, an activity prediction unit invoking active / dormant states in IC units. The prediction unit determines turn on and turn off times for each IC unit. The prediction unit controls a supply voltage select circuit selectively passing a supply voltage to a separate supply line at the predicted turn on time and selectively blocking the supply voltage at the predicted turn off time.

A circuit generally having a first module, a second module and a third module is disclosed. The first module may be configured to (i) generate a plurality of parsed residual blocks by parsing an 8×8 CABAC (context-based adaptive binary arithmetic coding) residual block received in an input signal and (ii) generate a plurality of metric signals resulting from the parsing of the 8×8 CABAC residual block. The second module may be configured to generate a scanning position signal based on the metric signals. The third module may be configured to generating a plurality of 4×4 CAVLC (context-based adaptive variable length coding) residual blocks in an output signal by sub-sampling the parsed residual blocks based on the scanning position signal.

A system for digital signal processing, configured as a system on chip (SoC), combines a microprocessor core and digital signal processor (DSP) core with floating-point data processing capability. The DSP core can perform operations on floating-point data in a complex domain and is capable of producing real and imaginary arithmetic results simultaneously. This capability allows a single-cycle execution of, for example, FFT butterflies, complex domain simultaneous addition and subtraction, complex multiply accumulate (MULACC), and real domain dual multiply-accumulators (MACs). The SoC may be programmed entirely from a microprocessor programming interface, using calls from a DSP library to execute DSP functions. The cores may also be programmed separately. Capability for programming and simulating the entire SoC are provided by a separate programming environment. The SoC may have heterogeneous processing cores in which either processing core may act as master or slave, or both cores may operate simultaneously and independently.

A microprocessor implemented method for processing a load instruction is disclosed. The method comprises computing a virtual address corresponding to the load instruction. Next, it comprises performing a lookup of a set associative translation lookaside buffer (TLB) and a set associative data cache memory in parallel using early calculated lower address bits of the virtual address. Subsequently, it comprises retrieving a set of entries from the TLB corresponding to a first group of lower address bits transmitted to the TLB, wherein the set of entries comprise a plurality of virtual addresses and corresponding physical addresses. Further, it comprises finding a matching entry for the virtual address in the set of entries using upper bits of the virtual address, wherein the matching entry comprises a physical address corresponding to the virtual address. Finally, it comprises finding a matching entry in the data cache memory using the physical address.

The invention discloses a system and method for monitoring a virtual machine process, and a method for filtering page fault anomalies. The monitoring system comprises an interception setting module which modifies a virtual machine system call table dynamically in real time and intercepting virtual machine system call; a capturing module which captures anomalies generated when the virtual machine process is called by a monitoring system; an analysis processing module which analyzes a virtual machine process system call behavior is abnormal or not; a strategy library which stores virtual machine system call monitoring strategies, wherein abnormal system call behavior data in the virtual machine is stored in logs; and a terminal which updates the strategy library dynamically in real time. According to the system and methods, according to functions needing to be monitored, the monitoring strategies are configured dynamically in real time; the monitoring strategies can take effect instantly without rebooting the virtual machine or a cloud platform; extra performance consumption resulting from the fact that the virtual machine process is unnecessarily called by the monitoring system can be avoided; and the system and methods are compatible with system call processes initiated by all x86 instructions.

The invention belongs to the technical field of wireless communication and discloses a standard-orthogonalization-based hybrid pre-coding method for a large-scale MIMO system. Analog pre-coding design is based on equal-gain transmission. The phase of a main diagonal element of a baseband equivalent channel matrix is set to zero to obtain the maximum antenna array gain so as to reduce the total energy consumption and complexity of a transmitter. The design of a digital pre-coding matrix is based on standard orthogonalization and singular value decomposition. By mapping a desired user to other user null space, the interference between users is completely eliminated and the maximum spectral efficiency is obtained. A numerical result shows that the performance of the hybrid pre-coding method, when equipped with a small number of radiofrequency links, approaches that of an all-digital pre-coding solution that requires the same number of radiofrequency links as the antennas, and can obtain high spectral efficiency with low implementation complexity.

A technique for recovering of “squeezed” sectors in a set of sequential sectors such as are used in Shingled Magnetic Recording (SMR) is described. Embodiments of the invention use a programmable erased sector recovery scheme, which is a concatenation of a “Cauchy-type” track erasure correction code, together with a media-error correction code that generates N-weighted parity-sectors per track and is capable of replacing up to N-erased sectors per track in any possible combination.

The invention belongs to the technical field of sparse signal restoration, and particularly relates to a low-complexity massive sparse signal reconstruction method in signal receiving on the basis of generalized approximate message passing (GAMP). The low-complexity massive sparse signal reconstruction method includes the following steps that a receiving signal y=A*x is obtained through compressed sensing and sampling, initialization is carried out, loop iteration is conducted, and restored signals are input. Compared with a traditional restoration algorithm based on Bayes, a generalized approximate message passing method is used. The low-complexity massive sparse signal reconstruction method can effectively reduce computation complexity on the basis of keeping signal superior reconstruction performance. Computation time complexity is reduced from O(n3) to O(mn), namely cube complexity is reduced to linear time complexity, and signal processing pressure of the rear end is greatly reduced, wherein m and n refer to the dimension of an observed value and the dimension of original signals.

The invention relates to a cloud computing system and a method for running high-performance computation in the same. The method comprises a step of creating a high-performance computation resource pool. The step of creating the high-performance computation resource pool specifically comprises: creating a scheduling system virtual machine in a computing node based on a high-performance computation operation demand by a cloud computing management system to run a high-performance computation scheduling system, creating computation virtual machines in a certain quantity of computing nodes, and returning information of the computation virtual machines to the high-performance computation scheduling system to form the high-performance computation resource pool. The created high-performance computation resource pool further can dynamically add and recover resources. According to the method, the high-performance computation resource pool is created in the cloud computing system; and by adopting a virtualization technology, the flexibility and elasticity brought by virtualization can be achieved in high-performance computation, and nearly no performance loss is caused. Therefore, the utilization rate of resources can be increased, the monopolization of a single business to the resources can be broken through, and the dynamicity of a whole computing service platform is realized.

The disclosure is directed to a method for reducing the chemical activity and photo activity of titanium dioxide nanoparticles comprising adding an amorphous alumina-stabilizing agent, specifically an anion, such as citric acid, to an aqueous slurry of the titanium dioxide nanoparticles; treating the aqueous slurry with a source of alumina, such as a solution of sodium aluminate, to form alumina-treated titanium dioxide nanoparticles; recovering the alumina-treated inorganic nanoparticles, wherein the nanoparticles have a particle size of about 50 to about 300 nm; and milling the nanoparticles to form nanoparticles having a particle size about 15% smaller than silica-treated inorganic nanoparticles milled under similar conditions. The titanium dioxide nanoparticles described herein are useful in cosmetic, coating and thermoplastic compositions.

The invention relates to the field of visible light communication, and provides a DCO-OFDM system direct current bias setting method applicable to visible light communication. Channel coding is carried out information source information before the information source information is modulated; good error correction and detection performance of an error correction code is utilized, reliability and power utilization of a system are taken into account comprehensively, the clipping proportion of a time-domain signal is appropriately added at a sending end, direct current bias required by the system is reduced, and therefore the power utilization rate of the system and the illuminating brightness adjustable range are improved. A receiving end compensates for clipping distortion of the sending end through error correction capacity of a channel code. The DCO-OFDM system direct current bias setting method reduces the magnitude of the direct current bias which needs to be added when DCO-OFDM modulation is carried out by the sending end, the power utilization rate of the system is improved, the brightness adjusting range on the aspect of illumination of visible light communication is expanded to a certain extent, and reliability and applicability of the system are enhanced.

An expansion cycle liquid oxygen and methane upper-stage engine system comprises a propellant supply system, an ignition system and a thrust chamber. The propellant supply system comprises a methane supply system and a liquid oxygen supply system, the methane supply system pressurizes low-temperature liquid methane from an external storage tank and then supplies the low-temperature liquid methaneto the thrust chamber; the liquid oxygen supply system pressurizes the low-temperature liquid oxygen from the external storage tank and then supplies the low-temperature liquid oxygen to the thrust chamber; and the ignition system is located at the head of the thrust chamber and ignites under the control of a control system, liquid oxygen and methane entering the thrust chamber are ignited, and generated high-temperature gas is sprayed out of the nozzle of the thrust chamber to generate thrust force. The liquid oxygen and liquid methane are used as a propellant combination, and a closed expansion circulation system scheme is adopted, so the system is simple, the inherent reliability is high, the specific impulse performance is high, and repeated starting is easy to achieve.

The present invention discloses a method and a system of logical volume dynamic allocation on shared storage, relating to the technical field of cloud computing. The system comprises a plurality of servers, shared storage devices and network switches; each server is provided with a virtual disk drive program, a service program and a command line tool; one of the servers is used as a main node and the other servers are used as subordinate nodes. A user sends out a command of creating a virtual disk through the command line tool, and sends the command to the service program of the main node. The service program of the main node calls the drive program, creates the virtual disk, saves the corresponding configuration and mapping data in the reserved space of the virtual disk, and returns the result of creation to the command line tool; and the command line tool updates local data and loads the corresponding virtual disk locally by using the drive program. The present invention has the advantages of low cost, low consumption, high performance, and high availability without the need of purchasing expensive high-end storage devices, and achieves the dynamic allocation of the storage space according to needs.

A reloadable training munition having a reusable shell base having a propulsion system reload inserted into a hollow cavity of the shell base and a reusable single piece projectile inserted into the shell base, the projectile having a hollow body portion, a driving band adjacent the body portion, and a nose portion adjacent the driving band having void spaces for controlling both density and mass properties of the nose portion.

A high strength, low friction engineered material includes a low friction material filling interstices of a metal microlattice. The metal typically comprises 5 volume % to 25 volume % and the interstices typically comprise 75 volume % to 95 volume %, based on the total volume of the metal microlattice and the interstices. The low friction material preferably fills 100 volume % of the interstices. The metal microlattice can be formed of a single layer, or multiple layers, for example layers of nickel, copper, and tin. The low friction material is typically a polymer, such as polytetrafluoroethylene (PTFE), polyamide (PAI), polyetheretherketone (PEEK), polyethylene (PE), or polyoxymethylene (POM). The low friction material can also include additive particles to modify the material properties. The engineered material can be used in various automotive applications, for example as a bearing, or non-automotive applications.

A method, system, apparatus, and computer-readable medium are provided for taking snapshots of a storage volume. According to aspects of one method, each snapshot is represented as a unique sequence number. Every fresh write access to a volume in a new snapshot lifetime is allocated a new section in the disk, called a provision, which is labeled with the sequence number. Read-modify-write operations are performed on a sub-provision level at the granularity of a chunk. Because each provision contains chunks with valid data and chunks with invalid data, a bitmap is utilized to identify the valid and invalid chunks with each provision. Provisions corresponding to different snapshots are arranged in a linked list. Branches from the linked list can be created for storing writable snapshots. Provisions may also be deleted and rolled back by manipulating the contents of the linked lists.

The invention relates to a low-feedback multi-user scheduling method in cooperative multicast MIMO transmission. The method comprises the following four schemes: (1) NUS, (2) Large Scale, (3) Local-NUS and (4) Local-Large Scale; and the four schemes are respectively based on different channel feedback information and have a unified executive process. The method is a scheduling method for selecting a plurality of service users in the spatial domain, and ensures the fairness among different users by combining an opportunistic round-robin scheduling method on a time domain; the scheduling process is as follows: 1. initialization, the user with best channel condition is selected as a first user according to the feedback information; 2. a scheduling user set is iteratively selected from the rest users based on the selected user until the given stopping criterion is met; and 3. the selected user is eliminated based on the opportunistic round-robin scheduling method, and the step 1 and the step 2 are repeatedly carried out. Compared with the cooperative scheduling method based on the complete channel information, the method has no high performance loss but remarkably reduces the feedbackquantity of the system; and compared with the non-cooperative system, the invention can greatly improve the system performance.

The technical problem to be solved by the invention is to provide a BM3D integration method. The method comprises the following steps: a, after 3D denoising processing, storing image processing information according to a line index or a column index; and b, reading the image processing information of a specific frame at a storing position from the storing position, reconstructing the image processing information of the specific frame and completing image reconstruction. The method realizes BM3D real-time integration processing by optimizing a BM3D integration process. In the method, the data structure and control flow are simple enough to be realized by software easily, and multiprocessor can be used for parallel processing. In addition, the method also makes the chip realization easy, is favorable for satisfying the high throughout needs for high-definition and multipath processing and realizes the video image BM3D real-time processing.