339 results about "Price–performance ratio" patented technology

The invention relates to a steel plate surface polishing device, in particular to a steel plate surface polishing device for hardware machining. The steel plate surface polishing device for hardware machining aims to achieve the technical purposes that manual labor is not needed, the requirement for professional operation skills is not high, operation is easy, the price-performance ratio is high, the safety coefficient is high, and harm of the operation environment to health of operators is small. In order to achieve the technical purposes, the steel plate surface polishing device for hardware machining comprises a bottom plate, a first sliding rail, a first sliding block, a collection tank, a fixing stop block, a spring, a supporting rod, a first bearing pedestal, a first air cylinder, a disc and the like, wherein the first sliding rail is arranged in the middle of the top of the bottom plate. Through ingenious cooperation of the components, the effects that manual labor is not needed, the requirement for professional operation skills is not high, operation is easy, the price-performance ratio is high, the safety coefficient is high, and harm of the operation environment to health of the operators is small are achieved.

The invention relates to a multifunctional data acquisition module based on a compact peripheral component interconnect (CPCI) bus. The multifunctional data acquisition module comprises a hardware module and a field-programmable gate array (FPGA) program. The hardware module comprises an impedance control circuit board, an electronic component, a small computer system interface (SCSI100) signal connection socket, a standard CPCI bus connector, and a standard 3UEurocard front panel. The impedance control circuit board and the electronic component are the core functional carriers of the invention and are divided into eight functional units such as an analogue-digital (AD) conversion module, a digital-analogue (DA) conversion unit, a timer unit, a counter unit, a universal input-output (IO) unit and an auxiliary circuit unit. The FPGA program comprises an AD conversion module, a DA conversion module, a timer module, a counter module and a universal IO module and is programmed and developed by Verilog hardware description language (HDL). The multifunctional data acquisition module has steady performance, high reliability, high bus signal driving capability, far transmission distance, simple structure, powerful function, high cost performance, is convenient to use, and can perform long-term and continuous mass data transmission.

The invention discloses an optimization system of media selection in network advertisement delivery and a method thereof. The system comprises a client, a data processor terminal and a database terminal. Through the combination of a principal component analysis method and an optimization model, an optimal media delivery program is obtained, by using historical delivery data (including clicks, show, CTR, CPC, and CPM) of an advertisement position, a main factor influencing an advertisement effect is extracted through the principal component analysis method, thus the optimization model of media combination is established, a solution of the model is calculated through a solver, an optimized media combination is presented to an advertiser finally, recommended media combination is more accurate, and the advertisement effect with a high performance price ratio is reflected.

The invention provides an automatic tracing identification system for artificial neural control. The system comprises a fixed viewing field video acquisition module, a full-functional variable viewing field video acquisition module, a video image identification and judgment algorithm module, an artificial neural control module, a moving object track tracing module, a database comparison and alarm judgment module, a monitoring characteristic entering and rule setting module, a light monitoring and controlling module, a background light source module, an alarm output, display and storage module and a safety monitoring sensor. The system fully solves the problems of unclear doubtful target characteristics, single function, low intelligence degree and the like in post processing and images of the prior image monitoring system, uses the artificial neural control, biological identification technology and intelligent image identification algorithm, and has the characteristics of high intelligence degree, precaution, clear doubtful object images, high cost performance and the like.

The invention provides a hierarchical storage method. The method comprises the following steps of automatically classifying storage: starting a cluster and automatically identifying storage hierarchies on which hosts of various types are located; performing oriented access: selecting short-distance high-storage-hierarchy light-load nodes for data storage and reading; seeking hot data: recording access information of each data block in a document, judging migration time, obtaining the value of each accessed data block according to the recorded information in the coming of the migration time, and forming a queue from high to low according to the values; and migrating the data blocks: migrating the high-value data blocks to high-storage-hierarchy storage layers, and migrating the low-value blocks to low-storage-hierarchy storage layers. With the adoption of the hierarchical storage method provided by the invention, the arrangement is easy, the hardware is low in price and the cost performance is higher; and meanwhile, the data scheduling of the cluster is improved, so that the access performance of the cluster is optimized.

The present invention discloses a detection method, a receiver, and an apparatus in a multiple-input multiple-output single-carrier block transmission system. Through sorted QR decomposition (Sorted QR Decomposition, SQRD) decomposition based on a minimum mean squared error (Minimum Mean Squared Error, MMSE) criterion, an matrix inverse operation in minimum mean squared error equalization is avoided, and complexity is significantly reduced. In addition, through layer-by-layer soft interference cancellation detection after the SQRD decomposition and further iterative processing, better detection performance may be obtained. Especially, inter-stream interference suppression may be performed in first iteration. Compared with a conventional parallel iterative soft interference cancellation detection algorithm, with the same number of times of iteration, especially under the limit that a receiver can only support a small number of limes of iteration, the inter-stream interference suppression has more evident advantages, and an advantage in the aspect of cost performance is very obvious.

This invention relates to a fault collection detecting apparatus and its method and the system comprises upper computer and down computer. The down computer adopts data collection board and is used to data collection of multiple-path spot and buffer and pre-process, while the upper computer adopts PDA and receives the sent data by the down computer through the serial port. The down computer realizes the whole spot monitor tasks, such as analog signal collection, AD conversion and simple data process part and controls the hardware scale and power consumption of the system. The upper computer realizes the further data process, spot real time analysis display element, history data re-display.

The invention relates to a task optimized-scheduling method in a data center on the basis of critical paths of a workflow. The task optimized scheduling method comprises the following steps of according to the difference of all subtasks in the applied workflow, determining key factors influencing the system performance by the data center, comparing the cost performance of all the subtasks according to an optimization objective and the workflow characteristics, and determining resource nodes distributed to all the subtasks so as to provide two scheduling methods of the resource nodes on the basis of different requirements of users and enable the rent of the resource nodes to be optimized or the processing time of the workflow to be shortest, so the maximum data processing capability purchased by unit fund is realized while the rent expense of resources is saved, or the cost performance of the system is improved, the operating efficiency of the system is enhanced, the processing time of the workflow is reduced, and simultaneously, the execution plan of the resource nodes is generated. The task optimized-scheduling method has the beneficial effects that the two factors of the time and the quantity of the nodes in the rent cost of resource nodes are both considered, the minimized rent expense of the resource nodes is used for purchasing the resource nodes with the strongest computing capability; a mathematical model of the method can adapt to various types of applications, and the operating cost of the applications is greatly reduced.

The invention provides an advertisement management method which includes a step for acquiring information of at least one advertisement; a step for performing quality evaluation on the information of the at least one advertisement to obtain advertisement quality of the at least one advertisement; and a step for performing priority management on the advertisement quality of the at least one advertisement. The invention also provides an advertisement cost calculation method and an advertisement system. The advertisement management system, the advertisement cost calculation method and the advertisement system provided in the invention reduce click paying cost of advertisement issuance, thereby reducing cost of advertisement issuer, improving effect and property-to-price value of the advertisement issuance, and indirectly stimulating active auction of advertisement issuers. By affecting priority of the advertisement with matching degree and click degree, matching degree of the advertisement and the page where the advertisement is increases and advertisement effect is improved to ensure gain of the advertisement operator.

The invention discloses a logistics information integration method and a logistics information integration system. A shipper can issue shipment requirements and the freight; the system pushes the shipment requirements and the freight to a potential carrier; if the potential carrier meets the shipment requirements and accepts the freight, an order can be received, or the order is received after the shipper and the potential carrier regulates the shipment requirements and the freight through negotiation; the carrier can issue return information; and the shipper selects the proper carrier for business arrangement from the return information. The scheme has the advantages that the shipper can find the carrier which is suitable for the shipper and has the highest cost performance in a fast and convenient mode on the premise of ensuring the safety of shipment goods; the carrier can also find the supply of goods in a fastest mode to improve the self work efficiency; and the method and the system are applicable to the field of logistics and express.

The invention provides a coking raw material applicability classification, comprehensive quality evaluation and coal blending guiding method. According to the method, specific indexes of coking raw materials and the mass index of solid products obtained from coking of the coking raw materials are integrated into three single indexes including caking capacity, coking capacity and a thermal property index according to the corresponding relations with coke quality indexes, and applicability classification is performed on the coking raw materials; the three single indexes are then integrated with ash content and sulfur content value indexes into an comprehensive capacity index, and six price-performance ratio indexes are formed through correlation between the three single indexes, the one comprehensive capacity index, the ash content and sulfur content value indexes and the price; after the applicability classification, coking coal blending is performed according to the three single indexes of the coking raw materials, the one comprehensive capacity index and the ash content and sulfur content value indexes, the six indexes for coal blending are controlled to be within plus/minus e%*a reference scheme score (e ranges from 5 to 10), the price-performance ratio of the six indexes for coal blending is calculated, an optimal coal blending scheme is determined, and refined and optimized coal blending is realized.

The invention discloses a method for evaluating the cost performance of the coking coal. The method comprises the steps that: the quality index base values and the quality evaluation standard are set according to the coal types, and the quality index base values are set parameter values for essentially meeting the coke quality requirement; and the actual values of the known quality indexes are compared with the quality index base values of the quality indexes, the scores of the actual values of the quality indexes corresponding to the quality index base values of the quality indexes are obtained according to the quality evaluating standard, a total score of the quality indexes is obtained by the scores, and then the coal price is compared with the total score of the quality indexes so as to obtain the cost performance parameters of the coals, and the cost performance of the coking coal is reflected by the comparison of the cost performance parameters. Compared with the prior art, the method for evaluating the cost performance of the coking coal provided by the invention is simple to operate and easy to implement, and the evaluating way is intuitive and clear, the evaluating result is accurate and objective, so that adjustment can be carried out according to the actual conditions. The method for evaluating the cost performance of the coking coal provided by the invention is suitable for the quality evaluation of the single coal and the blended coal.

The invention discloses a high-cost performance system for controlling combustion redundancy of a coal-fired heat transfer material heater, which relates to the technical field of DCS industrial control systems, in particular to the system for controlling the combustion redundancy of the coal-fired heat transfer material heater of a large-scale chain coal bed. The system comprises a PLC, an operation management system, a frequency conversion control technical system and a conventional electric control system. The combustion control and the heating circulation control of the control system areensured by two sets of control systems and bumpless control right transfer is realized, and the two sets of systems have low cost and high cost performance, and ensure the safety and the reliability of heat medium heater control system; a humanized operator interface is adopted and an expert diagnostic system is provided; and control software is designed with a standardized, functionalized and modularized structure and has easily expanded functions, add programs and adjust parameters. The system ensures the safe production of a heat medium heater, heat medium temperature control accuracy and the probability of improving the combustion efficiency of fire coal, and has good control effect and relatively lower running cost.

The invention discloses a method for online valuation of used cars. The method for online valuation of the used cars comprises the steps of (1) carrying out data capture in a timing mode on main vehicle circulation trading platform websites on the internet through a net crawler program, (2) carrying out discrimination on vehicle model information of various platforms, and corresponding prices to vehicle models, (3) carrying out statistical analysis on data through a linear regression method after a large number of price data are collected, obtaining a linear equation Y=a*X+b, wherein prices and mileages serve as the weight of the linear equation, the Y stands for the prices, and the X stands for the mileages, and (4) adopting an online evaluation method to apply to the linear equation on the websites, working out a fair price of a used car to be evaluated, helping a user to distinguish cost performance of the used car according to cost performance when car source search is carried out, and expressing the cost performance through a showing form. The method for online valuation of the used cars can rapidly provide vehicle evaluation values for ordinary consumers, serves as a barometer of a vehicle circulation market, reflects market price behavior, provides data information besides experience for professional users, and can serve as reference for professional vehicle evaluators.

The invention discloses a control device and a control method for an AC-DC (Alternating Current-Direct Current) series resonant matrix converter for capacitor charging and mainly aims at solving the problem in the prior art that the control property of a capacitor charging power supply is not high enough to meet the power supply requirement of a high-power microwave system. The control device for the AC-DC (Alternating Current-Direct Current) series resonant matrix converter for capacitor charging comprises a zero-crossing comparator, an On-Off state control unit, a timing sequence generating unit, a control parameter calculation unit, a load voltage acquisition circuit and a trigger driving circuit. The invention further discloses a control method of the control device. With the technical scheme, the control device and the control method, disclosed by the invention, have the advantages that the price/performance ratio is relatively high property, the power supply requirement of the high-power microwave system can be sufficiently met, and the practical value and the popularization value are high.

The invention discloses a low-cost Alpha+Beta type titanium alloy, the titanium alloy contains, in weight percent: aluminum 4.5 to 8 percent, chromium 0.3 to 2 percent, iron 0.3 to 2 percent, molybdenum 0 to 1 percent, balance titanium and unavoidable impurities. The Alpha+Beta type titanium alloy of the invention contains no noble metal of vanadium, and has equivalent comprehensive mechanical properties compared with Ti-6Al-4V, thereby increasing the price performance ratio while reducing the titanium alloy manufacturing cost, and having the broad market prospect.

A low-cost calibration system for multiple air quality monitoring sensors comprises a machine cabinet, a calibration cabin and a static pressure box, wherein the machine cabinet is used for providing polluted gas with set concentration and controlling the speed of calibration gas, the calibration cabin is arranged at the upper end of the machine cabinet, communicated with the machine cabinet and provided with the calibrated sensors, and the static pressure box is connected with the upper end of the calibration cabin through a first flange; a flow equalizing film is arranged in the static pressure box, one side of the static pressure box is connected with one end of an air feeding pipe through a second flange, the other end of the air feeding pipe is connected with an air outlet of an air feeding regulation device, an air inlet of the air feeding regulation device is connected with a filtering device through an air director, a polluted gas filling pipeline used for guiding polluted gas with set concentration into the air feeding pipe from the machine cabinet is arranged between the machine cabinet and the air feeding pipe, and a stainless steel flow equalizing net used for equalizing airflow is arranged on a channel between the calibration cabin and the static pressure box. The system mainly aims to achieve scientific calibration of cheap sensors, performances of cheap sensors can be improved remarkably, and cost performance of sensors can be improved exponentially.

A simplified future mobile terminal system syncretizes and integrates various wireless transmission technologies through a mobile cloud solution of a virtual mobile server system based on an innovative OWA (Open Wireless Architecture), wherein the mobile cloud solution achieves high frequency spectrum utilization ratio and high performance-price ratio.

When numbers of node in network increases to a certain scale, network topology interconnection techniques between exchangers are produced. Synthesized interconnection mode of fat tree topology and full net topology is utilized in the invention, that is to say fat tree interconnection is utilized for each branch and full net interconnection mode is applied among branches. Based on number of branch, two branches fat trees, three branches fat trees and four branches fat trees are named. Comparing with network topology structure of nonblocking fat tree under condition of the same number of exchnger, the invented structure possesses advantages of available large scale of networked scale, lowered communication delay, and higher rate of performances/cost.

The invention relates to a CPCI redundancy backup system and comprises at least a redundancy backup unit which comprises a first system board module, a second system board module and one or two sections of CPCI bus; wherein, a section of CPCI bus only can be provided with CPCI bus control management by the first system board module or the second system board module at any moment; when the first system board module carries out the CPCI bus control management, the second system board module can receive backup data sent by the first system board module, and when the first system board module breaks down, the second system board module switches the CPCI bus control management authority. The CPCI redundancy backup system can provide the redundancy backup to all plug-ins including a primary system board; a broken-down board can be isolated automatically; and a backup component can be connected automatically. The CPCI redundancy backup system has high reliability and best price performance ratio and is particularly fit for high reliable communication and industry control platform with large I/O data volume, and the CPCI redundancy backup system has wide application prospect in the fields of modern communication, spaceflight, military matters, etc.

The invention relates to the technical field of industrial Ethernet communication protocols, and discloses a POWERLINK communication protocol hardware realization method. In the embodiment of the invention, the method comprises steps: a data link layer and a physical layer interface of the POWERLINK communication protocol are realized based on any one chip selected from the following: a programmable logic device, a custom hardware chip and a semi-custom hardware chip; and the application layer of the POWERLINK communication protocol is realized based on any one mode selected from the following: a soft core processor, an embedded processor, and a general processor. POWERLINK master station equipment or slave station equipment obtained by adopting the realization method has a high data transmission response capability, high-speed and high-precision industrial field control requirements are met, the expansibility is more flexible, any object dictionary and any number of slave stations can be supported, the cost performance is good, and software and hardware are easy to realize and maintain.

The invention provides a recommendation method and device, an electronic device and a readable storage medium. The recommendation method comprises the steps of obtaining the historical information ofa user; determining a key demand of the user according to the historical information; extracting the candidate commodities matched with the key requirements from a preset merchant list database; extracting the commodity sales information of the candidate commodities; according to the commodity sales information, obtaining a commodity sales cost performance index meeting the key requirement; and according to the commodity sales cost performance index, displaying the commodity aiming at the commodity sales information to the user, so that the problem that in the prior art, the commodities recommended according to the user requirements need to be further screened by users is solved.

The invention provides a data processing method and device, and a server and relates to the technical field of a computer. The method comprises steps that the information of a first order submitted bya user for providing the vehicle transportation service is acquired; a driver for allocating the first order is determined according to the information of the first order; the driver's order probability is calculated through utilizing a machine learning model according to the information of the first order and the information of the driver; the corresponding subsidy amount is determined accordingto the driver's order probability. The method is advantaged in that the order rate of orders with low cost performance can be enhanced.

There is proposed a backup apparatus and a backup method capable of improving the cost performance of a storage apparatus. A backup volume having a capacity corresponding to at least the summation of the capacities of online volumes is created. The storage area of the created backup volume is divided into at least the same number of partitions as the online volumes. Backup data for each of the online volumes is stored in a corresponding one of the partitions.