ORACLE的解析器按照從右到左的順序處理FROM子句中的表名，F(xiàn)ROM子句中寫在最后的表(基礎表 driving table)將被最先處理，在FROM子句中包含多個表的情況下,你必須選擇記錄條數(shù)最少的表作為基礎表。如果有3個以上的表連接查詢,
上傳時間： 2013-12-26
上傳用戶：410805624
A dissipative particle swarm optimization is developed according to the self-organization of dissipative structure. The negative entropy is introduced to construct an opening dissipative system that is far-from-equilibrium so as to driving the irreversible evolution process with better fitness. The testing of two multimodal functions indicates it improves the performance effectively. structure. The negative entropy is introduced to construct an opening dissipative system that is far-from-equilibrium so as to driving the irreversible evolution process with better fitness. The testing of two multimodal functions indicates it improves the performance effectively.
標簽： self-organization optimization dissipative developed
上傳時間： 2016-03-31
上傳用戶：zgu489
Widely known as carputer, this system is designed for: * calculating speed, fuel consumption, economy driving, e.t.c. * displaying information about temperatures and controll Air Conditioning system in your car.* * controlling other devices, like electrically opened windows.* The system is based on ATMega MCU programmed in C language.
標簽： calculating consumption carputer designed
上傳時間： 2016-05-29
上傳用戶：lili123
ST7787 芯片的SPEC，比亞迪2.4inchLCM的SPEC。The ST7787 is a single-chip controller/driver for 262K-color, graphic type TFT-LCD. It consists of 720 source line and 320 gate line driving circuits. This chip is capable of connecting directly to an external microprocessor, and accepts Serial Peripheral Interface (SPI), 8-bits/9-bits/16-bits/18-bits parallel interface. Display data can be stored in the on-chip display data RAM of 240x320x18 bits. It can perform display data RAM read/write operation with no external operation clock to minimize power consumption. In addition, because of the integrated power supply circuits necessary to drive liquid crystal, it is possible to make a display system with the fewest components.
上傳時間： 2016-09-22
上傳用戶：woshini123456
管腳號 管腳名稱 LEVER 管腳功能描述 1 VSS 0V 電源地 2 VDD 5.0V 電源電壓 3 VEE 5.0V~(-13V) 液晶顯示器驅動電壓 4 D/I H/L D/I=“H”,表示DB7~DB0為顯示數(shù)據(jù) D/I=“L”,表示DB7~DB0為顯示指令數(shù)據(jù) 5 R/W H/L R/W=“H”,E=“H”,數(shù)據(jù)被讀到DB7~DB0 R/W=“L”,E=“H→L”, DB7~DB0的數(shù)據(jù)被寫到IR或DR 6 E H/L 使能信號：R/W=“L”,E信號下降沿鎖存DB7~DB0 R/W=“H”,E=“H” DRAM數(shù)據(jù)讀到DB7~DB0 7 DB0 H/L 數(shù)據(jù)線 8 DB1 H/L 數(shù)據(jù)線 9 DB2 H/L 數(shù)據(jù)線 10 DB3 H/L 數(shù)據(jù)線 11 DB4 H/L 數(shù)據(jù)線 12 DB5 H/L 數(shù)據(jù)線 13 DB6 H/L 數(shù)據(jù)線 14 DB7 H/L 數(shù)據(jù)線 15 CS1 L （19264A) 選擇IC1,即（左）64列 16 RESET L 復位控制信號，RST=0有效 17 CS2 L （19264A) 選擇IC2,即（中）64列 18 CS3 L （19264A) 選擇IC3,即（右）64列 19 V0 -9V Negative Voltage for LCD driving 20 LED+ +5.0V The LED supply
上傳時間： 2014-01-01
上傳用戶：541657925
In a world where consumers,businesses and organizations are demanding faster,amerter and more seamlessly converged information technology and communization services,concepts such as Driverless Cars,combining advanced automatic controls,artficial intelligences and automotive transport technologies are soon expected to become a commercial realty.At the same time,new blueprints such as industrial internet and industry 4.0 are driving the increased digitization of entire industries and economic sectors,boosting efficiencies and productivity.
標簽： ZTE-M-ICT
上傳時間： 2020-06-01
上傳用戶：shancjb
Micro-Electro-Mechanical Systems (MEMS) are miniature systems composed ofintegratedelectricalandmechanicalpartstosenseand/orcontrolthingsonaμmscale. The concept of MEMS is attributed to Richard Feynman’s famous talk on December 29th, 1959 [2,3]. Dr. Feynman foresaw many aspects of future MEMS development with his insight in microphysics. In particular, material properties in the μm scale are differentfrombulkpropertiesandthescalingdownofintegratedcircuits(IC)fabrication technology has been a major driving force of MEMS development.
標簽： Performance High MEMS RF
上傳時間： 2020-06-06
上傳用戶：shancjb
Artificial Intelligence (AI) has undoubtedly been one of the most important buz- zwords over the past years. The goal in AI is to design algorithms that transform com- puters into “intelligent” agents. By intelligence here we do not necessarily mean an extraordinary level of smartness shown by superhuman; it rather often involves very basic problems that humans solve very frequently in their day-to-day life. This can be as simple as recognizing faces in an image, driving a car, playing a board game, or reading (and understanding) an article in a newspaper. The intelligent behaviour ex- hibited by humans when “reading” is one of the main goals for a subfield of AI called Natural Language Processing (NLP). Natural language 1 is one of the most complex tools used by humans for a wide range of reasons, for instance to communicate with others, to express thoughts, feelings and ideas, to ask questions, or to give instruc- tions. Therefore, it is crucial for computers to possess the ability to use the same tool in order to effectively interact with humans.
標簽： Embeddings Processing Language Natural in
上傳時間： 2020-06-10
上傳用戶：shancjb
以STC12C5A60S2單片機為控制核心,采用2.4G(JF24D)無線遙控模塊進行無線發(fā)射與接收,設計了一種雙電機遙控船模控制系統(tǒng).該系統(tǒng)通過切換檔桿實現(xiàn)前進后退,方向盤左右轉動、暫停按鈕等控制直流電機的正轉、反轉、暫停,使得電機驅動的遙控船模實現(xiàn)前進后退、左右轉向、暫停等功能,有效解決了驅動功率小和船模之間相互干擾等問題,可廣泛應用于遙控船模領域.Using STC12C5A60S2 single-chip microcomputer as the controller and 2.4 G(JF24D)wireless remote control module for wireless transmission and reception, a dual-motor remote control ship model control system is designed. The system realizes forward and backward by switching the gear lever. The steering wheel rotates left and right and the pause button controls the forward, reverse and pause of the dc motor. The remote controller of ship model driven by the motor realizes forward and backward, left and right steering, pause and other functions. The ship model control system can effectively solve the problems of small driving power and mutual interference between ship models, and can be widely used in the field of remote controller of ship model.
標簽： 電機 遙控船模 控制系統(tǒng)
上傳時間： 2022-03-27
上傳用戶：
以AT89S52單片機為控制核心,采用電容降壓技術,Buck電路拓撲,PWM驅動模塊和功率器件散熱設計,通過高速的數(shù)據(jù)采集、主功率輸入輸出模塊和控制模塊,設計一種新型智能車載充電器.在充電過程中,通過負脈沖瞬間放電實現(xiàn)對鉛酸蓄電池的再生修復,提高電池的有效容量,延長使用壽命.該充電器體積小、速度快、效率高、可靠性好.With AT89S52 single chip computer as the control core,a new type of intelligent car-carried charger was designed by using capacitance step-down technology,Buck circuit topology,PWM driving module and power device heat dissipation design,through high-speed data acquisition,main power input and output module and control module.In the charging process,the regeneration and repair of lead-acid batteries are realized by instantaneous discharge of negative pulse,which improves the effective capacity of batteries and prolongs their service life.The charger has the advantages of small size,fast speed,high efficiency and good reliability.
標簽： 車載充電器
上傳時間： 2022-03-27
上傳用戶：
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