276 results about "Offered load" patented technology

A system and method for a media access control (MAC) scheduling algorithm having a distributed, self-coordinating approach to provide use fairness and service differentiation in an ad hoc network by using control RTS / CTS messages carrying node status information. A local scheduling algorithm uses the overheard RTS / CTS information with attributes specifying nodes' status to maximize the awareness of the neighborhood status for a multi-channel system where data and ACK messages are transmitted through different data channels. If the system uses a single channel, the corresponding information may be carried by using DATA or ACK messages. The algorithm measures the offered load, carried load, and backlogged load in the neighborhood to adjust the channel access timer to provide use fairness among different nodes, different links, and different streams. The algorithm can further both calculate the priority level based on the node queue status, and calculate the priority level based on the neighbor status, to break the contention tiers and enable the service differentiation.

An application estimates sizing information and capacity limits for a processing system configuration using load data automatically provided by a load determination application. A system supports selection of processing devices for a particular user. At least one repository includes, usage information indicating distribution of usage of a plurality of functions supported by a particular configuration of processing devices and capacity information including data identifying a load limit associated with a particular usage distribution and a particular configuration of processing devices. An interface processor retrieves, from the at least one repository, data identifying a candidate particular configuration of processing devices in response to received data indicating a particular usage distribution.

A system and method for a media access control (MAC) scheduling algorithm having a distributed, self-coordinating approach to provide use fairness and service differentiation in an ad hoc network by using control RTS / CTS messages carrying node status information. A local scheduling algorithm uses the overheard RTS / CTS information with attributes specifying nodes' status to maximize the awareness of the neighborhood status for a multi-channel system where data and ACK messages are transmitted through different data channels. If the system uses a single channel, the corresponding information may be carried by using DATA or ACK messages. The algorithm measures the offered load, carried load, and backlogged load in the neighborhood to adjust the channel access timer to provide use fairness among different nodes, different links, and different streams. The algorithm can further both calculate the priority level based on the node queue status, and calculate the priority level based on the neighbor status, to break the contention tiers and enable the service differentiation.

The invention provides a supported metallocene catalyst, which comprises a carrier, and alkyl aluminoxane and a metallocene compound which are supported on the carrier, wherein the metallocene compound has a structure shown as a formula 1. The invention also provides a method for preparing the supported metallocene catalyst, a method for preparing an olefin polymer by using the catalyst, and the olefin polymer prepared by the method for preparing the olefin polymer. In the olefin polymerization process, the supported metallocene catalyst can reduce the using amount of the alkyl aluminoxane so as to reduce the preparation cost of the olefin polymer; the high molecular weight polyethylene prepared by using the catalyst has a good shape and high bulk density; and the catalyst can be applied to gas-phase polymerization and slurry polymerization processes. The formula 1 is shown as the specifications.

The present invention provides an architecture that advantageously leverages multiple content distribution networks to provide enhanced services. In accordance with an embodiment of the present invention, a share of content requests are served by each of a plurality of content distribution networks. The fraction of content requests served by a particular content distribution network can be determined dynamically, depending on the offered load or other traffic characteristics.

In a radio communication system having a data channel for the transmission of data packets from a primary station to a secondary station, a plurality of downlink control channels are used to signal information relating to packet transmission. A problem with this scheme is that with a fixed control channel allocation system throughput (T) for a given offered load (O) can be significantly reduced in a worst case scenario (for example two secondary stations using the same control channel). One solution uses an indicator signal to inform a secondary station of the control channel it should receive, but this adds significant complexity to the system. The present invention provides a simpler scheme having similar benefits by shuffling the allocation of control channels to secondary stations, according to a defined sequence for each secondary station, thereby avoiding the worst case scenario.

The invention discloses a load balancing method and system facing mixed cloud application and a corresponding mixed cloud load balancing system. Aiming at the fact that a cloud tenant uses mixed clouds to calculate IaaS (infrastructure as a service) platform deployment application, the invention solves the problem of load balancing of the application under a multi-cloud environment. The system and method use a layered load balancing mechanism, load state information and resource state information of private clouds and public clouds are dynamically collected by a heartbeat packet at an upper layer, and issuing priorities of tasks to respective clouds are adjusted; at a lower layer, and LBaaS (load balancing as a service) internally provided form the clouds is used to perform load balancing among virtual machines. During outbreak of the cloud application, the public cloud with the highest cost performance can be selected for resource extension according to price fluctuation of the public clouds and the requirement of the cloud tenant on the minimal cost budget. According to the invention, the cloud tenant can be helped to customize application requirements per se when using the mixed clouds, and automatically select a cloud resource use scheme with the highest cost performance.

The invention discloses a spherical montmorillonite mesoporous composite carrier and a preparation method thereof, a supported benzenesulfonic acid catalyst and a preparation method thereof, an application of the catalyst in an esterification reaction, and a preparation method of ethyl acetate. The spherical montmorillonite mesoporous composite carrier contains montmorillonite and a mesoporous molecular sieve material, average particle size of the spherical montmorillonite mesoporous composite carrier is 30-60 micrometers, the specific surface area is 150-600 square meters / gram, pore volume is 0.5-1.5 milliliters / gram, aperture distribution is trimodal distribution, most probable apertures corresponding to three peaks are 2-4 nanometers, 5-15 nanometers and 10-40 nanometers respectively. The provided supported benzenesulfonic acid catalyst has the advantages of high catalytic activity and repeated usage.

The invention discloses a load balancing method used in a cellular cooperative relay network, a device thereof and a base station, wherein, the method comprises the following steps: selecting a cell cluster consisting of non-hotspot cells adjacent to hotspot cells; determining the traffic volume transferred from the hotspot cells to the non-hotspot cells according to load conditions of various cells in the cell cluster; and determining users transferring the traffic in the hotspot cell, relay stations and transmission channels used by the traffic users. By dynamic establishment of the cell cluster, the load balancing method, the device and the base station can timely adapt to the burst and the uneven distribution of the traffic in a network, thus effectively balancing the load; the traffic load balancing ensures real-time traffic QoS in the hotspot cells, and minimizes the blocking rate of the whole cell cluster system; and the resource scheduling based on the transfer efficiency meets the load balancing requirements, and effectively improves the spectral efficiency of cell cluster systems.

The invention provides a method for balancing load applied in a distributed mass memory system. The method comprises the following steps: setting a heavy-load server and a light-load server; identifying a chunk (Chunk); identifying the heavy-load server and the light-load server; sequencing the heavy-load server and the light-load server in a decreasing order; determining whether a corresponding chunk of a first heavy-load server has a copy on a first light-load server; transferring the corresponding chunk of the first heavy-load server to the first light-load server; and the like. Through a load-balancing algorithm provided by the invention, the problem of reduced reliability of the system caused by transferring copy of the chunk (Chunk) to the same chunk server (Chunk Server) in the load balancing process of the distributed mass memory system can be solved.

The present invention is a shared buffer architecture that dynamically allocates buffer size to each of multiple sources depending on buffer pool utilization, estimated per-connection offered load, and the total number of connection established within a given class of service. When the buffer pool is almost empty, each source is allocated a large buffer space, proportional to its estimated offered load. When the buffer pool is more full each source is allocated a reduced buffer space, while maintaining the proportional weighting relationship. The invention keeps track of the amount of input per source and dynamically allocates a proportionate amount of buffer space in the buffer memory for that source. The dynamic allocation is made as a function of the fullness of the memory allocation for all sources. Additionally, thresholds are modulated dynamically as the number of established connections within a given class modulates, providing a predictive aspect to the system, with respect to congestion control. The main objective is to fairly allocate buffer space depending on the amount of traffic and the amount of buffer space taken up by each source. In operation, the memory allocation is readjusted depending on the total number of cells in the buffer memory, the estimated offered load, and the total number of connection established within each class of service, providing a highly dimensional solution to the multi-dimensional problem of congestion management in communication network nodes.

A switching DC to AC power converter includes an automatic zero voltage switching (ZVS) mode controller. The automatic zero voltage switching mode controller may adjust a ZVS dead-time in accordance with a range of load currents being supplied by the power converter that range from quiescent conditions to a predetermined loading level of the power converter. The variable ZVS dead-time may be larger nearer to quiescent conditions, and become progressively smaller as load currents increase. Outside a predetermined range of load currents, the variable ZVS dead-time may be disabled or minimized.

The invention discloses a supported polyethylene catalyst ingredient and a preparation method thereof, and a supported polyethylene catalyst and an application thereof. The supported polyethylene catalyst ingredient comprises a spherical composite carrier, and magnesium salt and titanium salt supported on the spherical composite carrier, wherein the spherical composite carrier contains a molecular sieve material having a one-dimensional hexagonal tunnel structure, the molecular sieve material having a two-dimensionl hexagonal tunnel structure and silica gel, an average particle size of the spherical composite carrier is 30-60 micrometers, a specific surface area is 150-600 square meter / g, a pore volume is 0.5-1.5milliliters / g, apertures present three-peak distribution, three peaks can be respectively corresponded to a first most probable aperture, a second most probable aperture and a third most probable aperture, the first most probable aperture is 2-4 nanometers, the second most probable aperture is 5-15 nanometers, and the third most probable aperture is 10-40 nanometers. The provided supported polyethylene catalyst has high catalysis efficiency during an ethene catalysis / polymerization process.

The invention discloses speed reducer testing equipment. The speed reducer testing equipment comprises a support platform, and a servo spindle motor, a first rotation speed and torque sensor, a second rotation speed and torque sensor, a transmission and a brake which are arranged on the support platform, wherein an output shaft of the servo spindle motor is connected with an input shaft of a speed reducer to be tested through the first rotation speed and torque sensor; an output shaft of the speed reducer to be tested is connected with an input shaft of the transmission through the second rotation speed and torque sensor; an output shaft of the transmission is connected with the brake; the first rotation speed and torque sensor is used for detecting input rotation speed and / or input torque; the second rotation speed and torque sensor is used for detecting output rotation speed and / or output torque of the speed reducer to be tested; the transmission and the brake are matched to provide a load for the speed reducer to be tested. Due to the adoption of the mode, according to the speed reducer testing equipment, the transmission and the brake are matched to provide the load, the load provided by the brake is exponentially amplified by the transmission, so that a large-size brake is not needed even through a large load is needed during testing, and thus the cost is reduced.

An NFC initiator device requests a passive communication mode by modulating a request onto a first carrier signal. In response thereto, the target device transmits a second carrier signal while still receiving the first carrier signal from the initiator device. The target device may modulate data onto the second carrier signal to convey information to the initiator device. The initiator device may detect changes in the load provided by the target device to interpret the data conveyed by the target device.

A method for managing data traffic in a multiple-user multiple simultaneous access environment using a channel load estimate and a calculation. The estimate or estimates are used to calculate a congestion threshold (CT) and to select a current congestion threshold broadcast to all potential users. An experiment is performed by users comparing that congestion threshold value and a random number to determine if a packet is eligible to be transmitted, thus throttling the random transmission of packets so that the transmitted load from the terminal has a rate of packet transmission that is less than the congestion threshold times the offered load (from the user), where the congestion threshold value is related to the probability of a globally successful transmission of a number of simultaneously transmitted packets. A quality of service (QOS) factor may also throttle the transmitted load.

The invention discloses a load catalyst. The catalyst comprises a carrier and a metal active component loaded on the carrier, wherein the carrier is barium titanate, the content of the carrier is 60wt%-98wt% of the total weight of the catalyst, and if the content of the carrier takes 100 weight parts, the content of the active component is 1.5-30 parts by weight metered by metal elements. The invention also provides a preparation method and application of the load catalyst, and a method for preparing low carbon olefin by methane oxidative coupling. The load catalyst provided by the invention has the advantages of high activity during the preparation of low carbon olefin by methane oxidative coupling, and good stability of long-time operating property.

A control packet of an OBS network comprises a label which is switched for fast transmitting each packet from a source host to a corresponding destination host, a wavelength ID for distinction of channel and switching, a CoS field providing different type of CoS, an offset time indicating the difference between an arrival time of the control packet and an arrival time of the data burst, a data burst size and a CRC for error detecting. A data burst generation algorithm uses hysterisis characteristics in the queueing model for an ingress edge node in an optical burst switching network. This algorithm adaptively changes the data burst size according to the offered load and offers high average data burst utilization with a lower timer operation.

The invention relates to a method for realizing load balancing based on synchronous digital hierarchy in an automatic switch optical network, which comprises: adopting multiple Dijkstra algorism to calculate a plurality of disjoint paths from a source node to a destination node; adopting a route calculation module to attain the available bandwidth of all chains contained in each disjoint path, adopting the minimum available bandwidth of all chains contained by each disjoint path as the maximum available bandwidth provided by the disjoint path, dividing the maximum available bandwidth of each disjoint path by the path index of the path to attain the load index of each disjoint path, and selecting a best path from a plurality of disjoint paths according to the load index. The load balancing method can reduce the service amount affected by accident network resource and can keep a certain redundancy in all resources in a network to provide protection and recovery for existed services, thereby reducing the failure rate of service protection and recovery.

The invention discloses an ionic liquid-supported polymer, the preparation method and application of the polymer. The ionic liquid-supported polymer of the invention is the copolymer of vinyl imidazole salt and polymer cross-linker. According to the invention, firstly, N- vinyl imidazole is reacted with chlorobutane to produce imidazole salt; then the ionic liquid is fixed on a solid polymer through the free radical copolymerization between the imidazole salt of ethylene and divinylbenzene. The ionic liquid-supported polymer of the invention has good catalytic activity to the reaction that epoxides and carbondioxide are reacted to synthesize cyclic carbonate through cycloaddition, therefore, the ionic liquid-supported polymer is a solid catalyst with high activity and high selectivity. Compared with other catalysts, the ionic liquid-supported polymer has simple preparation process and the firm supporting; when the reaction is finished, the reaction solution can be easily treated, and the catalyst can be filtered and separated easily and can be reused.

The invention discloses a preparation method of methylsilicone oil, and specifically relates to methyl silicone oil with different viscosity (molecular weight) prepared by using supported solid superacid SO4<2-> / ZrO2-ZSM-5 as a catalyst and by adopting inexpensive and commercially available methylsilicone oil (Dn), octamethylcyclotetrasiloxane (D4) and hexamethyldisiloxane (MM), so as to fit various needs. Compared with a conventional catalyst for producing methylsilicone oil, the supported solid superacid catalyst provided by the invention has higher catalytic activity, higher stability, lower cost and the like. More importantly, the supported solid superacid catalyst is in a solid state and can be separated via simple filtration and reused, thereby enabling the production to have the advantages of simple process, convenient operation, no pollutions, no corrosion toward equipment, and the like.

The invention discloses a spherical montmorillonite mesoporous composite carrier and its preparation method, a supported benzenesulfonic acid catalyst and its preparation method, a use of the supported benzenesulfonic acid catalyst in an esterification reaction, and a preparation method of ethyl acetate. The spherical montmorillonite mesoporous composite carrier contains montmorillonite and a mesoporous molecular sieve material having a three-dimensional tunnel structure. The spherical montmorillonite mesoporous composite carrier has the average particle size of 20-50 microns, a specific surface area of 150-600 m<2> / g and a pore volume of 0.5-1.5ml / g, and has a bimodal pore diameter distribution mode and most probable pore diameters of 2-8nm and 20-50nm corresponding to two peaks. The supported benzenesulfonic acid catalyst has high catalytic activity and can be recycled.

A control circuit can control the operation of a switching converter to provide a regulated load current to a load. The switching converter includes an inductor and a high-side and a low side-transistor for switching the load current provided via the inductor. A digital modulator is configured to provide a modulated signal having a duty cycle determined by a digital duty cycle value. A current sense circuit is coupled to at least one of the transistors and is configured to regularly sample a load current value. A comparator is coupled to the current sense circuit and is configured to compare the sampled load current value with a first threshold and to provide a respective comparator output signal. A regulator is configured to receive the comparator output signal and to calculate an updated digital duty cycle value.

A method of controlling a switching converter and a related controller suitable for the switching converter allow to implement a burst-mode functioning without generating acoustic noise and with a relevantly reduced ripple of the regulated DC voltage or current provided in output to a supplied load. The method includes sensing the difference between the error signal and the burst-stop threshold at the beginning of a burst period. If the error signal has surpassed (either upwards or downwards) the burst-stop threshold, the method sets the switching stage in a high impedance state at a new active edge of a clock signal, keeps the switching stage in the high impedance state for an integer number of cycles of the clock signal, and re-enables the switching stage to switch the energy tank circuit up to the end of the burst period. The integer number is determined based on the difference between the error signal and the burst-stop threshold,

A storage and retrieval system is provided that automates the process of handling a mixed inventory of palletized and containerized items. The invention is particularly useful in handling cargo and weapons within a ship's hold or magazine. When used on a ship, the invention provides for the stowing and unstowing of loads quickly and efficiently, to automatically secure such payloads for sea and to achieve high stowage density, while retaining the capability to select and retrieve any ordered payload, move it to and load it on elevator trays under computer control.

An air interface simulator and simulation method is disclosed. The air interface simulator comprises a first plurality of variable attenuators for equally providing a mobile station with a transmission signal received from base transceiver station (BTS) before the air interface simulator starts driving, a plurality of attenuators for generating path loss to prevent power of the mobile station from being excessively input to said BTS and to construct an air environment, a first plurality of 2-way dividers for generating an input terminal for providing load in a reverse link of the BTS and combining the provided load and a RF signal of the mobile station, a plurality of duplexers for duplexing a transmission signal and a received signal of the BTS into a RF signal of the mobile station, a second plurality of variable attenuators for generating path loss and long-term effect, a first plurality of 4-way dividers for combing input signals from each BTS, a second plurality of 4-way dividers for combining input signals from each mobile station and a decoder circuit for controlling the first and second plurality of variable attenuators, the decoder circuit being provided with control input from a parallel port of a control computer.

Power consumption is reduced for power supplied by a voltage adapter, such as an AC / DC adapter. A power source is connected to a power unit, including the voltage adapter and control circuitry. The voltage adapter supplies power to a load, such as a computer system. A load current supplied by the voltage adapter and an output voltage of the voltage adapter are measured by the control circuitry, and a control device of the control circuitry selectively disconnects the voltage adapter from the power source. The disconnecting is responsive to the control circuitry inferring from the measured current and voltage that the load is turned off, or at least operating in a reduced power consumption mode.

The invention discloses a supported polyethylene catalyst ingredient and a preparation method thereof, and a supported polyethylene catalyst and an application thereof. The supported polyethylene catalyst ingredient comprises a spherical composite carrier, and magnesium salt and titanium salt supported on the spherical composite carrier, wherein, the spherical composite carrier contains a molecular sieve material having a three-dimensional cubic tunnel structure and silica gel, an average particle size of the spherical composite carrier is 10-50 micrometers, a specific surface area is 200-600 square meter / g, a pore volume is 0.5-2 milliliters / g, apertures present doublet distribution, doublet can be respectively corresponded to a first most probable aperture and a second most probable aperture, the first most probable aperture is 4-8 nanometers, and the second most probable aperture is 20-30 nanometers. The provided supported polyethylene catalyst has high catalysis efficiency during an ethene catalysis / polymerization process.

The invention provides a switch constant flow source circuit with no-feedback load end which includes: a brightness data input unit; an over-current detecting unit connected with the load; a bus; an aiming brightness value generating unit for generating corresponding aiming brightness value according with the brightness data, aiming brightness initial value and the rated operating current preset by the load, a power pipe control signal generating unit for generating corresponding control signal according with the aiming brightness value; a switch circuit with a power pipe for closing and opening the power pipe to output a high frequency signal according with the power pipe control signal; a filtering circuit with DC signal for filtering the high frequency signal filter and forming a driving load; a current detecting unit that feedbacks the detected present load current value to the power pipe control signal generating unit for adjusting the generated power control signal to realize constant current, wherein, the aiming brightness initial value is generated by the time for raising the load current from 0 to the over-current value continuously which can solve problems of electromagnetic interference and high frequency spark.