給定兩個(gè)集合A、B,集合內(nèi)的任一元素x滿足1 ≤ x ≤ 109,并且每個(gè)集合的元素個(gè)數(shù)不大于105。我們希望求出A、B之間的關(guān)系。
任 務(wù) :給定兩個(gè)集合的描述,判斷它們滿足下列關(guān)系的哪一種:
A是B的一個(gè)真子集,輸出“A is a proper subset of B”
B是A的一個(gè)真子集,輸出“B is a proper subset of A”
A和B是同一個(gè)集合,輸出“A equals B”
A和B的交集為空,輸出“A and B are disjoint”
上述情況都不是,輸出“I m confused!”
The W78E58B is an 8-bit microcontroller which has an in-system programmable Flash EPROM for
firmware updating. The instruction set of the W78E58B is fully compatible with the standard 8052. The
W78E58B contains a 32K bytes of main ROM and a 4K bytes of auxiliary ROM which allows the
contents of the 32KB main ROM to be updated by the loader program located at the 4KB auxiliary
ROM 512 bytes of on-chip RAM four 8-bit bi-directional and bit-addressable I/O ports an additional 4-
bit port P4 three 16-bit timer/counters a serial port. These peripherals are supported by a eight
sources two-level interrupt capability. To facilitate programming and verification, the ROM inside the
W78E58B allows the program memory to be programmed and read electronically. Once the code is
confirmed, the user can protect the code for security
設(shè)計(jì)一種基于AT89C52的語音錄放系統(tǒng),利用單片機(jī)、ISD2560語音錄放器件、麥克風(fēng)、揚(yáng)聲器等元器件實(shí)現(xiàn)硬件電路的設(shè)計(jì),并利用C51高級語言設(shè)計(jì)ISD2560器件控制字的寫入和定時(shí)中斷程序。經(jīng)軟硬件調(diào)試,結(jié)果表明該系統(tǒng)錄放效果良好,具有一定的工程實(shí)用價(jià)值。
Abstract:
Voice recording and playback system based on AT89C52is designed in this paper.Using the single-chip microcomputer,voice recording and playback chip ISD2560,microphone and speaker to realize the hardware circuit design.Writing ISD2560control words and timing interrupt procedures are designed by C51advanced language.Through the hardware and software test,voice recording and playback system play better voice,and this system has some engineering practical values.
提出一種基于C8051F040的炮塔方位角測試系統(tǒng)的設(shè)計(jì)方案,給出測試系統(tǒng)的各個(gè)模塊軟硬件設(shè)計(jì)。炮塔方位角測試系統(tǒng)集數(shù)據(jù)采集,數(shù)據(jù)傳輸和數(shù)據(jù)顯示等功能于一體,實(shí)現(xiàn)了炮塔方位角裝置的離線檢測。系統(tǒng)軟件采用C51編寫,對單片機(jī)進(jìn)行有效電源管理,保證了系統(tǒng)的穩(wěn)定性,可靠性。
Abstract:
This paper puts forwards a design of artillery position system based on C8051F040,describes all modules hardware and software design of measurement system.The system has the function of information collection,transmission,and display.It can measure artillery position system in offline.The system software using C51can manage the power of single chip microcomputer,guarantee the stability,reliability.
介紹一種基于單片機(jī)的多路溫度采集及監(jiān)控系統(tǒng),能夠測量6路溫度信號,具有計(jì)算機(jī)聯(lián)網(wǎng)功能,各測量點(diǎn)可以單獨(dú)監(jiān)控和設(shè)置,可根據(jù)用戶的需求自動控制。測量溫度范圍為-10 ℃~200 ℃,控制方式采用模擬量調(diào)壓模式。該系統(tǒng)具有控制精度高、沖擊小等特點(diǎn)。
Abstract:
A temperature collecting and surveillance-controlling system based on sing-chip microcomputer is introduced. It can measure 6 channel signal of the temperature,and it has a function of network connection.The temperature measure points can be monitored and located, it can be controlled automatic according to user’s demand.The temperature range is -10℃ to 200℃.The model of control is adjustable voltage with simulation. It features high precision and little impact.
單片機(jī)是單片微型計(jì)算機(jī)(SingleChipMicrocomputer)的簡稱,它的內(nèi)部包含有計(jì)算機(jī)的基本功能部件:中央處理器(CPU)、存儲器、定時(shí)/計(jì)數(shù)器、各種串/并行I/O接口電路等。因此,單片機(jī)只需要和適當(dāng)?shù)能浖巴獠吭O(shè)備相結(jié)合,便可成為一個(gè)單片機(jī)控制系統(tǒng)。近年來,由于半導(dǎo)體技術(shù)和工藝的快速發(fā)展,以及針對各行各業(yè)的實(shí)際應(yīng)用需要,單片機(jī)的開發(fā)方面又出現(xiàn)了許多新的技術(shù)。SOC(System On Chip,片上系統(tǒng))等名詞日益被人們所熟悉和關(guān)注。
NXP Semiconductor designed the LPC2400 microcontrollers around a 16-bit/32-bitARM7TDMI-S CPU core with real-time debug interfaces that include both JTAG andembedded Trace. The LPC2400 microcontrollers have 512 kB of on-chip high-speedFlash memory. This Flash memory includes a special 128-bit wide memory interface andaccelerator architecture that enables the CPU to execute sequential instructions fromFlash memory at the maximum 72 MHz system clock rate. This feature is available onlyon the LPC2000 ARM Microcontroller family of products. The LPC2400 can execute both32-bit ARM and 16-bit Thumb instructions. Support for the two Instruction Sets meansEngineers can choose to optimize their application for either performance or code size atthe sub-routine level. When the core executes instructions in Thumb state it can reducecode size by more than 30 % with only a small loss in performance while executinginstructions in ARM state maximizes core performance.