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The graduation design is based on single chip microcomputer intelligent design of a power source, hardware design is the main task of the circuit design, battery, the three groups of different size power design, system design, manostat ADC0809 adc design, display design, the watchdog circuit module design, 3-8 decoder circuit design, AT89C51 basic circuit design, 74LS161 prescaler design and auxiliary circuit design, Software design task is: initialize program design, and key process design, charge control program design, A/D conversion program design, over-current protection program design, display design program.

本次毕业设计注意是设计一个基于单片机的智能电源，硬件设计的主要任务是：蓄电池充电电路的设计、三组不同大小的电源设计、系统稳压电源设计、ADC0809模数转换电路设计、看门狗电路设计、显示模块设计、3-8译码电路设计、AT89C51基本工作电路设计、74LS161分频器设计和辅助电路设计；软件设计的任务是：初始化程序设计、按键程序设计、充放电控制程序设计、A/D转换程序设计、过流保护程序设计、显示程序设计。

Accurate analog power is to provide power, digital chip, amplifiers, microcontroller is the voltage required by A/D sampling data output voltage, and comparison, if there is A deviation is the limit, adjust output signal output and closure, alarm, The working process of the working status, manostat by SCM outputs drive LED display, Display circuit used to display the size of the output voltage of power.

准确说就是模拟电源提供各个芯片电源、数码管、放大器所需电压，单片机则通过A/D采样输出电压，与设定值进行比较，若有偏差则调整输出，越限则输出报警信号并截流；工作过程中，稳压电源的工作状态均由单片机输出驱动LED显示；显示电路用于显示电源输出电压的大小。

Polyvinylidene Fluoride PVDF homopolymer conforming to ASTM D-3222, Type I, Grade 2, is a tough, abrasion-resistant fluorocarbon material that has a design stress of 1,360 psi at 73°F and a maximum service temperature of 280°F.

聚偏二氟乙烯PVDF均聚物，符合ASTM D-3222，类别1，等级2标准，是一种坚固的、耐磨的碳氟化合物材料，在22oC下，其设计应力为1，360 psi，最高工作温度达到137oC。

We first discovered the presystolic wave of PRG and suggested that a complete PRG should be consisted of 4 waves, namely, a, p〓, S, D.

我们首次发现肺血流图上心室收缩前波的存在并提出完整肺血流图应由a波ps波S波及D波4个波组成。

Susan Smally is a psychiatry professor at the University of California, Los Angeles. She just led a study of ADHD in northern Finland.

苏珊是是洛杉矶加利福尼亚大学的一位精神病治疗法教授，她刚负责一个对芬兰北部地区A.D.H.D的研究。

The compounds of series D can't exhibit any mesophases, but the compounds of series A and B possess a polar antiferroelectric smectic phase. The temperature range of B2 phase is the widest for the compound AC5 among them, up to 104.6℃.

研究结果显示系列D并没有液晶相形成，但系列A和系列B都会形成具反铁电性的B2相，其中化合物AC5的B2相温宽最宽，可达104.6℃。

By sampling echo signal demodulated and A/D transform, sampling value is transmitted to SCM for compare, division, calculation, and exporting gain code to control signal range; furthermore controlling the AGC circuit, realizing amplification control to echo signal, consequently stabilitate the signal range in a window for the later circuit.

通过对检波后的回波信号进行采样，经过A/D变换，采样值送入单片机内部进行比较、判别、计算，然后输出可控制信号幅度的增益码去控制AGC电路的受控级，实现对回波信号的增益控制，从而使得输出信号幅值稳定在一个窗口内，供后续电路处理。

Take as a single example this easily overlooked little passage from the rondo of the 23rd piano concerto; it is, in its essence, nothing more than a functional bit of connective tissue taking us from one place to another within the movement's structure. Ten brief bars—about 10 seconds—of basic scalar material, doing its job efficiently and economically. But it is at the same time so richly and amusingly characterized, so full of piping energy, with its determined but struggling piano line climbing its stutteringly inexorable way up to the note E, punctuated along its course by deadpan commentary from the winds, sneaking in the D natural that signals the change of key with almost undetectable sleight of hand—the passage almost constitutes a miniature comic universe all by itself.

请听这段在《第23钢琴协奏曲》中常常被人忽视的回旋曲( http：//img.slate.com/media/87/7_mozart488.asf )，没有哪个功能性连结段能比它更好地仅通过乐章结构就将听众带入另一个世界，长约10秒钟的概要部分(brief bars of basic scalar material)不仅经济有效地发挥其职能，同时又表现出丰富、诙谐的特色，充满木管乐器的活力，伴随着坚决但阻碍不断的钢琴的快速音群移入E大调，其行进过程不时被管乐器部加以修饰、注解，自然而然的转为D大调，转调手法之娴熟几乎无法察觉——这段音乐本身创造出一个微缩的喜剧世界。

Xylan is a major component of hemi-cellulose and is characterized by a -1,4-linked D-xylopyranosyl main chain that carries a variable number of neutral or uronic monosaccharide substituents.

木聚素是半纤维素的主要组成成分，并且是自然界中含量仅次於纤维素的多醣。所有植物的木聚素是由D-xylopyranosyl组成主干而以b-1，4键结，并带有许多像是醣醛酸此种的单糖侧链。

And wow that must suck week by week with no net no wounder ur so smart :D and ty for a guess at how to say ur name xD i need practice alot of practice and yes u have a good week to so glad to hear from u just made my day i needed a smile lifes kinda hard rite now family drama blegh and i reall need to send u pictures as well i feel so onesided with u sending all this and telling me all this lol.

还有，哇，一个个星期没有网路一定会很渣，怪不得你这么聪明：D 还有谢谢你给我猜怎么说你的名字 xD 我需要很多练习和你也有个好星期，灰常高兴可以听到你的消息我需要一个微笑的人生，现在非常艰难，家庭情节blegh是什么？。。。。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。