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A numerical method is gived to distinguish that a Petri net is a time charac-teristic nets or not.The time characteristics of transmit are discussed and the density formula of transmit is given. stochastic petri nets ; time characteristic ; distractive matte

一般情况下，随机Petri网现有的分析方法大多是假定变迁的发射时间服从负指数分布，然后将网标识过程等价于连续参数马尔可夫过程，然后利用求解马尔可夫过程的一套数学方法来分析Petri网的时间特

Subtract the distance at the first time from the distance at the second time (d2 - d1). Divide by the amount of time it took you to blow up the balloon.

令第二次测的距离减去第一次测的距离，即d2 - d1，用吹气球的时间去除。

On July 1, 2009 at the same day and later will draw a lottery the lottery ticket variety, the lottery ticket winner must exchange the prize date of 60 natural dates from the drawing a lottery, will exchange the prize deadline last day, if met the national legal holiday to postpone after the holiday had finished the first working day, exchanged the prize matters concerned to handle the time for the lottery ticket sale organization operating time; Exceeds the time limit has not exchanged prize the bonus to integrate the lottery ticket public welfare fund, authorizes the lottery ticket public welfare fund assignment policy execution according to the State Council.

通知规定，2009年7月1日前开奖的彩票品种，彩票中奖者应当按照财政部批准的游戏规则规定兑奖，逾期未兑奖奖金的处置按现行彩票管理制度规定执行。2009年7月1日当天及以后开奖的彩票品种，彩票中奖者应当自开奖之日起60个自然日内兑奖，兑奖期限的最后一天若遇国家法定节假日则顺延至节假日结束后的第一个工作日，兑奖事宜办理时间为彩票销售机构的工作时间；逾期未兑奖的奖金纳入彩票公益金，按国务院批准的彩票公益金分配政策执行。

If this kind of circumstance cannot reach from time to time to be solved neatly again, false with time, search room Hefei is sure to reduce net of station of 23 drift net.

搜房在占据下风的情况下，通过优秀，或者说是全面而周到的服务，得到了开发商乃至网民的认可并占领了市场。【以下内容为IT者网站提供英文翻译，未经授权请勿转载

The linear function applicable scope is broad, when the reservoir turnover water volume and the time, the student leaves the staircase mouth population and the time and the time and the motion communication speech spends the comparison and so on the relational question has the important application;The study linear function, may deepen in the life the linear question understanding and the understanding, is helpful in solves some simple function problem; The linear function some problem solving method has the universality in mathematics, the linear function related theory may use for to solve some other mathematics problem, For instance the dual linear equation group, a Yuan inequality, a Yuan quadratic equation most value question and some complex mathematics question, the light is studies the linear function the theory is insufficient, the key is can utilize actual the linear function goes is our final goal.

一次函数的适用范围广，在蓄水池的进出水量与时间、学生出楼梯口人数与时间与时间和移动通讯的话费比较等的关系问题时均有重要的应用；学习一次函数，可以加深生活中线性问题的认识与理解，有助于解决一些简单的函数问题；一次函数的一些解题方法在数学中具有普遍性，一次函数的有关理论可以用来解决一些其它的数学问题，比如二元一次方程组、一元一次不等式、一元二次方程的最值问题及一些复杂的数学问题，光是学习一次函数的理论是不够的，关键是能把一次函数运用到实际中去才是我们最终的目的。

According to the echocardiography,enlarged internal diameter of left ventricle was found in 8 patients and short-axis fractional shortening of left ventricle 5% in 3 patients.Six out of the above 8 patients presented with shortening of accerlerating time,decreasing of accerlerating time/right ventricular ejective time value and moving forward of spectral peak in different degrees.All patients were given antianginal drugs such as β-recepter blockers,nitrate preparations and part by angiotensin converting enzyme inhibitor,diuretics and digoxin,The illncss of 29 patients were gradually controlled within one week.Three patients with AD were complicated by acute left heart failure.No obvious changes in FS of left ventricle were found on echocardiography by bed.

测量肺动脉瓣口血流频谱，左心室内径增大的8例中有6例出现不同程度的血流加速时间缩短，血流加速时间/右心室射血时间比值减小，频谱峰值前移。31例均给予β受体阻滞剂、硝酸酯类等抗心绞痛治疗，部分给予血管紧张素转换酶抑制剂、利尿剂和地高辛，其中29例在1周内卧位型心绞痛逐步得到控制。3例卧位型心绞痛发作时合并急性左心衰竭者，在床旁观察超声心动图，发现左心室短轴缩短率无显著变化，给予利尿剂、减轻前后负荷等治疗，急性左心衰竭得以纠正。

The result makes clear, force of the grinding when using emery wheel of cast-iron bond diamond to undertake ELID grinding asks at any time scarcely change and change, and the change that adopts the grinding force when common grinding means undertakes grinding to let time increases ceaselessly, online electroanalysis the grinding function that nap makes emery wheel keeps good from beginning to end in grinding process, be helpful for saving time of emery wheel nap, improve treatment efficiency.

结果表明，采用铸铁结合剂金刚石砂轮进行ELID磨削时磨削力几乎不随时问的变化而变化，而采用普通磨削方式进行磨削时的磨削力随时间的变化不断增大，在线电解修整使砂轮在磨削过程中始终保持良好的磨削性能，有利于节省砂轮修整时间，提高加工效率。

Today is the first time for my son to go to kindergarten, the frist time to leave my family to go to a entirely strange place , I don't know whether he will suit soon ,whether he will loudly cry ,whether he will make the emiction in his trousers, whether he won't go in a few days…… Though he looked forward to there for a long time, he gladly told his father he will go to the kindergarten last night, but I really don't know what he is doing at the right, I'm really afraid of him, though I know this faraway worry no help for him, but he is just very small,if he is a little big ,maybe I can be better.

小楠今天第一天上幼儿园，第一次真正离开亲人，去一个陌生的环境，不知道他会不会很快适应，会不会大哭，会不会尿裤子，会不会以后不想去了。。。。。虽然那里早就是他向往的地方，昨天晚上还兴高采烈的告诉他爸爸，他要上幼儿园了，可是真不知道此时此刻他在干什么，真的很担心，尽管我知道这种遥远的担心根本无济于事，可他毕竟还小，如果再大点，我可能就会好很多。

By mapping a one-dimensional function of time, the time-frequency representation can localize the signal energy in both the time and frequ ency directions.

通过对一个一维时间或频率信号进行变换，其时频表示能够在时间-频率平面上描述信号的能量分布。

Have fun, enjoy oneself, have a good time, have a nice time, have a great time

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Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。