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The whole PWM circuit contains two subcircuit, the front-end is PWM module that make up of the counter that based on nine MOSFET True-Single-Phase-Clock D flip-flop; the back-end is demodulated module, which is consist of a three order Chebyshev low-pass filter used trans-conductor capacitor. All the subcircuits are simulated. At last, an approving simulated result of the whole circuit is given too.

在调制部分，利用九管单相时钟D触发器构成计数器，并由此组成了脉冲宽度调制电路，同时给出了在典型温度下的仿真结果；在解调部分，介绍了低通滤波器从无源到有源的设计方法，设计了三阶切比雪夫低通跨导电容滤波器，同样给出了相应的仿真结果；最后，作为将脉冲宽度调制电路和滤波器作为整体电路，以脉冲调频波为输入进行了仿真，取得了令人满意的结果。

For strong convective weather , it classified all historical sample events into 4 weather patterns (like northwest , trough area ,west wind and southwest current), established 4 characteristic fields of 400hPa height of HLAFS , then according to the principle of the pattern match calculate and compare the real-time HLAFS forecast products-2-using the similar method inside the big and small key areas , establish forecast equation , finally gain conclusion .To duststrom weather, the historical samples were sorted into duststrom and severe duststrom types in 5 regions (they are whole area, west, central, middle-west and middle-east of Inner Mongolia ),moreover set up different sample databases about ECMWF fields (including 500hPa height, 850hPatemperature and sea-level pressure).In order to making duststrom forecast at different time level , we first filtered the real-time data by FAX data ,and then used the method of similar range degree to compare the historical data to the actual data of ECMWF .To precipitation weather ,they were divided into 2 types that suit or unsuit airplane artificial precipitation stimulation in line with their emergence time and district .The appropriate weather physical factors come from T106 were chosen to establish the artificial precipitation stimulation prediction model . In the actual application , we can get prediction result as long as use the real-time forecast data of T213 in the prediction model .

针对强对流天气将历史样本天气分为西北气流型、槽区型、西风气流型和西南气流型等4个类型，并建立其HLAFS资料400hPa四种特征场，按照模板匹配的原理，用相似分析方法在大、小两个关键区中对实时HLAFS预报产品进行计算、比较，再建立预报方程，得出结论；对沙尘暴天气将其按区域分为全区、西部、中部、中西部以及中东部5类，再按强弱分别分为强和一般2类，建立ECMWF的3个场(500hPa高度场、850hPa温度场和海平面气压场)的历史资料库，在用传真资料消空之后，用相似离度方法计算实时ECMWF资料，做出不同时次的预报；对降水天气按出现时间和区域分为适合和不适合飞机增雨作业2类，选择T106资料中恰当的气象物理量因子，用BP神经网络算法建立人工增雨降水预报模型，实际应用中将实时T213相关预报资料代入预报模型即可。

There has been communication with the center that makes a company to online station every day recently, the station of themselves company (Www.ttwebsite.cn), colour advocate used on tone virescent, give a person a kind of beautiful and easy sense, optimize while the website is made go up to also make great efforts sufficient, what the website makes this word be applied in integral layout is proper, what the picture uses is less, the website is given priority to with literal sex, complete station can generate the each respect element such as page of HTML static state to permeate all sorts of concepts of SEO, optimize further according to company business characteristic and actual condition on this foundation, will achieve the result of get twice the result with half the effort!

最近和天天向上网站制作公司的站长有过交流，他们自己公司的站(www.ttwebsite.cn)，色彩主调上采用了淡绿色，给人一种美观大方的感觉，在网站制作的同时优化上也下足了功夫，网站制作这个词在整体布局运用的恰到好处，图片使用的较少，网站以文字性为主，全站可生成HTML静态页面等各方面因素都渗透了SEO的各种理念，在此基础上根据公司业务特色与实际情况进一步优化，将会达到事半功倍的效果！

Now there are many modifiers used in asphalt,but most modified asphalt specification systems are set up on the foundation of base asphalt,and the central issue is how to evaluate all of the modified asphalts properly. What's more,it will give rise to misunderstanding in the application and choice of modified asphalts and it is unfair to some of them.

目前使用的改性沥青品种非常多，但现在的评价规范体系都建立在基质沥青的基础上，如何评价改性沥青，一直是人们争论的焦点，这在使用和选择改性沥青时往往会引起许多误导，对某些改性沥青的应用显得十分不公平。

All this is being used by the big bourgeois capitulators and die-hards to prepare the way for capitulating to Japanese imperialism, breaking up the united front and dragging China backwards.

大资产阶级投降派和顽固派，并想以此作为投降日本帝国主义、分裂统一战线和拉了中国向后倒退的准备。

To solve this problem, you need to clean up all the unwanted garbage that is cluttering your computer to get rid of the unwanted evidence that may be used against you one day.

这一计划将让你删除所有不想要的证据，从您的计算机和继续摆脱它在一个预定的基础上，作为杂波开始合作

Oh, want to be cocooning silkworms silk to the right, but one night the time of the morning when I wake up have all become a white cocoon cute baby, and the original silk factory that is used to Silk Textile Materials ah!

哦，想来是蚕宝宝要吐丝结茧了吧，只不过一个晚上的时间，早上醒来时我的蚕儿已经全部变成了一个个洁白、可爱的茧宝宝了，原来这就是丝绸厂用来纺织丝绸的材料啊！

Incessantly the army dinned into the soldier's head that he could not molest the people, that he had to pay for everything he bought, that he could not loot, that he had to clean up rooms that he had used, that above all he must not make the people feel that the army was crushing their privileges.

部队反复地教育战士，不可欺压老百姓，买东西一定要付钱，不许抢劫，住过的民房必须给人打扫干净，特别是不得使老百姓感到军队在侵犯他们的利益。

There are many kinds of hoes, but all are used for loosening soil and digging up weeds.

锄头有很多种，但都用来松土和锄草。

Show up all over the place. The more I used it, the more readily

勇气用的越多，就越容易帮助我，我的生活

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。