跃

Presents a kind of modeling for chain grate stoker based on step signal input.

以20 t/h链条炉排工业锅炉为对象，采用阶跃响应法获取现场试验数据，再通过阶跃响应曲线求出锅炉对象的传递函数。

In consideration of the chain grate stoker with steam capacity of 20t/h,based on experimental testing data,a fast modeling with step input,was set up by calculating transfer function on step response curve,gets model parameters on "two-point method" on the first,and then modifies those parameters with "curve fitting method" through MATLAB/SIMULINK software,proves that the combination of "two-point method" and curve fitting mothod...

对阶跃响应曲线先采用&两点法&得出模型参数，再采用&曲线拟合法&对模型参数进行修正，从而实现系统动态特性建模。着重讨论了针对阶跃响应曲线，在&两点法&建模的基础上，进一步采用在MATLAB/SIMULINK软件环境下&曲线拟合法&对模型进行修正，发现&两点法&与&曲线拟合法&相结合的方法可以更准确地对系统进行建模。此方法可为锅炉燃烧优化设计、热力系统仿真研究提供热工对象理论模型，也可用于控制系统调试时控制参数的预选择。

By analyzing the characteristic of transition and corresponding stimulated-emission cross section in Nd:YAG crystal, according to the coupling condition of energy transition and material-determined wavelength, reasonable coupling parameters of laser rod and cavity mirrors were designed.

通过分析Nd：YAG的跃迁谱线和相应的受激发射截面的特点，根据多跃迁谱线激光材料波长选择的耦合率条件，合理设计激光棒和腔镜的耦合率参数。

The architecture style of the temple gate belongs to the Xie-summit type rostrum, the crenels of which look like the Great Wall, and on the top of which are two dragons ready to fly.

山门的建筑风格是歇山顶式的城楼，顶上的垛口像长城，最顶部有两条跃跃欲飞的龙。

When the detuning between the atomic transition frequency and the frequency of each mode is much large, the probability of atomic transition can be neglected.

当原子上、下能级的跃迁频率与腔场的每个模的频率都失谐较大时，原子的跃迁几率可以忽略。

Edit this paragraph the reasons for the color reaction of flame When the alkali metal and its salts in the ignition flame, the atoms absorb the energy of the electron from the orbit of low-energy transition to a higher energy orbit, but at a higher energy orbit is unstable electronic, it is fast transition back to a lower energy orbit, then the energy will be redundant form to emit light.

编辑本段焰色反应的原因当碱金属及其盐在火焰上灼烧时，原子中的电子吸收了能量，从能量较低的轨道跃迁到能量较高的轨道，但处于能量较高轨道上的电子是不稳定的，很快跃迁回能量较低的轨道，这时就将多余的能量以光的形式放出。

While this is going on, the ground sends up its own chain of shorter, positively charged leaders.

在这一&先兆&转瞬间即逝过后另一&先兆&随即发生，副电荷的释放就顺着这一好像睡莲叶一般的&先兆&接近地面，与此同时，地面上的正极电荷也在&跃跃欲上&迎合副电荷的到来，当两极在空中几百码相遇时，就产生我们所见的闪电，闪电的不规则就源自&先兆&形状的唯一性。

As for jump heighs there are some differences be-tween the continuous and discrete cases.In discrete case we introduce the empiricalscale codfficients to estimate jump heighs base on location estimators given by theabove method.

关于断点的跃度，在离散模型场合，通过引进样本的尺度系数并利用位置的小波估计可得到跃度的相合估计。

Considering both the intrastrand and interstrand nearest-neighbor hoppings of sites, electronic transmission coefficient of DNA is calculated, which depends on energy and interstrand hopping integral.

考虑基元间最近邻的链内和链间跃迁，我们计算了DNA的电荷迁移率随能量和链间跃迁积分的变化。

The FTIR spectrum of DTC-TETA showed strong absorption peaks at 1 461-1 388 cm-1 and 1 174-996 cm-1 which were attributed to partly double bonds of C and C,respectively.The UV spectrum of DTC-TETA had two absorption peaks at 265 and 290 nm,assigned to π—π* transition of N…C…S radical and nonbonding electron n—π* transition of S…C…S radical to conjugated system,respectively.

在DTC-TETA的红外光谱图中，在1461-1388cm-1处和1174-996cm-1处分别出现含有部分双键性质的〖JGC〖ZJXS，YN键和键的特征吸收峰；在紫外光谱图中，分别在265和290 nm处出现两个最大吸收峰，分别对应于N…C…S基团的π—π*跃迁和S…C…S基团中硫原子上非键电子向共轭体系的n—π*跃迁；元素分析结果表明该化合物中碳、氢、氮、硫的摩尔比近似为

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。