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Description: 本装置的功能是对温度进行实时监测与控制。由温度传感器DS18B20对温度进行采样和转换成数字信号送入单片机，并与设定的报警温度上、下限值进行比较，信息通过LCD显示出来。如实时温度超过设定的上、下限值，一方面由LCD显示信息，并发出警报声；另一方面自动控制继电器（Relay）开接通或断开，从而控制加热源的开与断，达到对温度进行实时控制的目的。-The device s function is to conduct real-time temperature monitoring and control. DS18B20 from temperature sensors on the temperature sampling and converted into digital signals into single-chip, and set the alarm temperature, the lower limit compared to information through the LCD display. Such as real-time temperature exceeds the set upper and lower limits, on the one hand by the LCD to display information and warning sound on the other hand, automatic control relay (Relay) to connect or disconnect opened to control the heating of the open source and off, to achieve real-time temperature control.
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Size: 61440 |
Author: 梁兴 |
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Description: pku 3613 Cow Relays
题意：给一个无向图，求从起点s到终点e尽力n条边的路径最小值。
边的数量2<=t<=100(每条边可以重复遍历)
算法：利用dp求出 path[ l ] [ i ] [ k ]=MIN(path[ l ][ i ] [ k ] , path[ l ][ i ] [ j ] + path[ l ][ j ] [ k ])
l 表示的是2的指数，假设 i 到 k 要途径 2^l 条边，那么他可以被分为两段 途径2^（l - 1）的路径。
利用开始的输入，然后递推，就可以推出所有的状态。
当需要找途经N条边的路径最小值时.将上面的值有效的组合起来.
上面求出了 1 2 4 8 16 …… 时的任意两条边的代价
对应的二进制是 1 10 100 1000 10000 ……
N可以拆成相应的二进制，然后用类似矩阵相乘的方法，往下推，就得到答案
m表示节点个数，(aXb)表示a行b列的矩阵一个 ，那么（1Xm）* path[ l ](mXm) 。
最终复杂度为O（t^3logn）
-Cow Relays
Time Limit: 1000MS Memory Limit: 65536K
Total Submissions: 1163 Accepted: 433
Description
For their physical fitness program, N (2 ≤ N ≤ 1,000,000) cows have decided to run a relay race using the T (2 ≤ T ≤ 100) cow trails throughout the pasture.
Each trail connects two different intersections (1 ≤ I1i ≤ 1,000 1 ≤ I2i ≤ 1,000), each of which is the termination for at least two trails. The cows know the lengthi of each trail (1 ≤ lengthi ≤ 1,000), the two intersections the trail connects, and they know that no two intersections are directly connected by two different trails. The trails form a structure known mathematically as a graph.
To run the relay, the N cows position themselves at various intersections (some intersections might have more than one cow). They must position themselves properly so that they can hand off the baton cow-by-cow and end up at the proper finishing place.
Write a program to help position the cows. Find the shortest path that
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Size: 1024 |
Author: zhang |
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Description: In networks without a hierarchy, any wireless device in the network can work as relay. In hierarchical multihop networks, only special devices provide relaying functionality.
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Size: 254976 |
Author: alaa |
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Description: 以中等纯度的精馏塔为研究对象，考虑到不等分子溢流的影响和非理想的汽液平衡，可以得到塔顶产品轻组分含量Y与回流量L之间的传递函数为：
控制要求：
1.采用积分分离 PID控制算法将塔顶轻组分含量Y控制在0.99
2.采用继电法整定PID参数
3.整定效果验证：当被控过程参数时变时，如滞后时间由4→8，开环增益由3.4→6时, 讨论PID控制的响应速度及鲁棒性问题，考察当系统参数发生改变时，上述PID参数是否选取合适。
-Moderate purity fractionator as the object of study, taking into account the ranging molecular overflowing and non-ideal vapor-liquid equilibrium can be obtained by the transfer function between the content of light components of the overhead product Y and back to the flow L: Control Requirements: 1. integral separation PID control algorithm to control the top of the tower light component content Y 0.99 2. relay Law tuning PID parameters. tuning effect is verified: change When accused of process parameters, such as the lag time from 4 → 8, the open loop gain discussed from 3.4 → 6, the PID control of the response speed and robustness issues investigated when the system parameters are changed, the PID parameters select appropriate.
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Size: 2048 |
Author: lulu |
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Description: 功放保护，负载输出L,R，都应对地是交流，经R3，R4,C2,C3，入地，交流对地短路，没有直流信号；若有一路含有直流成分，将在电阻电容节点产生或正或负的电压，经二极管桥，整成直流，当电压超过二极管正向电压和Q1导通电压时，Q1导通，Q2，Q3截止，继电器释放，起到某一通道不正常时保护。
此电路还有开机延时保护：开机，电压经R2向C4充电，电压慢慢上升，电压达到D8，Q2，Q3导通电压时，继电器吸合。达到延时接通负载作用-Amplifier protection load output L, R, should all exchanges by R3, R4, C2, C3, into the earth, AC-to-ground short circuit, DC signal if all the way with DC component will be generated in the resistor-capacitor node or a positive or negative voltage, through a diode bridge, the whole into a direct current, when the voltage exceeds a diode forward voltage and Q1 conduction voltage, Q1 turns on, Q2, Q3 is turned off, the relay release play a certain channel is not normal, protection. This circuit also start delay protection: Power voltage by R2 to C4 charge voltage slowly rising voltage reaches D8, Q2, Q3 conduction voltage and relay. Load to reach-delay
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Size: 2048 |
Author: 韩长宇 |
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Description: 负载输出L,R，都应对地是交流，经R3，R4,C2,C3，入地，交流对地短路，没有直流信号；若有一路含有直流成分，将在电阻电容节点产生或正或负的电压，经二极管桥，整成直流，当电压超过二极管正向电压和Q1导通电压时，Q1导通，Q2，Q3截止，继电器释放，起到某一通道不正常时保护。
此电路还有开机延时保护：开机，电压经R2向C4充电，电压慢慢上升，电压达到D8，Q2，Q3导通电压时，继电器吸合。达到延时接通负载作用-L, R, should all is AC load output by R3, R4, C2, C3, into the earth, AC-to-ground short circuit, DC signal if all the way with DC component will be generated in the resistor-capacitor node or a positive or negative voltage via a diode bridge, the whole into a DC, Q1 turns on when the voltage exceeds a diode forward voltage and Q1 conduction voltage, Q2, and Q3 is turned off, the relay release, play a particular channel is not normally protected. This circuit also start delay protection: Power voltage by R2 to C4 charge voltage slowly rising voltage reaches D8, Q2, Q3 conduction voltage and relay. Load to reach-delay
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Size: 2048 |
Author: 韩长宇 |
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Description: In this paper, we consider a coded cooperation diversity scheme that is suitable for L-relay channels that operate in the decode–forward mode. The proposed scheme is based on convolutional coding, where each codeword of the source node is partitioned into two frames that are transmitted in two phases.
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Size: 1238016 |
Author: Hakim |
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