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Model 2:Model 1 can predicts various indicators of the regional population, but the parameters trends to uncertainty during the long-term, and the cumulative effect of error is significant.

模型一能得到关于区域人口的项指标,但在对人口长期趋势进行预测时,模型一中参数存在较大的不确定性、且误差的累积效应明显,在进行长期预测时达到人口高峰后一直下降,不再有波动,这与实际历史上的三次高峰不符合,故在模型二中挖掘数据内在的相关信息,利用2001-2005年中国国家统计年鉴数据及模型一中短期预测的人口总数建立灰GM(1,1)模型对我国人口总数进行长期预测。

Phenological observation data of plant communities from 1982 to 1996 at 5 sites and a method for phenological cumulative frequency modeling were used to determine the beginning dates of local phenological seasons and their corresponding threshold values of normalized difference vegetation index in each year.

利用1982~1996年5个站点的植物群落物候观测数据和物候累积频率拟合法,划分站逐年的植被物候季节,并确定季节初日对应的当地归一化差值植被指数阈值。

For the limitations of the traditional algorithms that can not be reasonably used to predict the traffic, this paper adopted the BP neural network and curvilinear regression coupling algorithms to add the inadequate.

摘 要:针对传统交通量预测方法中的局限性,采用BP神经网络与曲线回归耦合算法,用BP神经网络对历史数据训练,利用曲线回归对因素待测年份之值进行预测,将因素的预测值带入已训练好的BP神经网络中,即可得到未来交通量的预测值。

For the limitations of traditional algorithms that can not be reasonably accurately predict the traffic, we have adopted BP neural network and curvilinear regression algorithms. First, we use BP neural network to train on historical data and then use the curve of regression to predict various factors, and then forecast data into the trained BP neural network which has been trained well, you can get future traffic forecasts.

针对以上传统算法的局限性,采用BP神经网络与曲线回归耦合算法,用BP神经网络对历史数据训练,利用曲线回归对因素待测年份之值预测,将因素的预测值带入已训练好的BP神经网络中,即可得到未来交通量的预测值。

The result was a firman of 1690, by which the Franciscans were to be reintegrated as they had been prior to 1630. The sentence was solemnly published in Jerusalem on June 25, 1690 in the presence of the authorities and the contending parties. On June 29th the Franciscan Custos, with a solemn Mass, took again possession of the Holy Sepulchre and other sites within the Basilica.

裁判结果出了一到敕令,颁布於西元1690年,再度确认方济会由西元1630年前已有的所有权,这判决隆重地在所有政要及争议双方面前颁布,时日为西元1690年6月25日,六月二十九日,方济会士,隆重在圣墓/复活大殿举行弥撒圣祭,再次接受圣地所有权,此权也包括其他圣殿内的小殿堂。

We construct a family of iterative mappings, which yield cyclic windows of variant size in the dynamical plane by incorporating cosine functions and non-linear angle variables with parameters. Chaotic attractors and filled-in Julia sets in the different cyclic windows are created by establishing the coordinates of any cyclic windows and the maximal window, then clarifying the relationship of corresponding points between these cyclic windows. The respective images in different windows are continuous but with individual structures.

该算法采用余弦函数及含参的非线性角度变量构造一族使动力平面上周期窗口的尺度变化的迭代映射;通过计算任意周期窗口和最大周期窗口得出窗口间相应点之间的非线性对应关系,并构造出周期窗口中的混沌吸引子和充满Julia集,其图案是连续的且结构不同的;选用不同的周期窗口作为基本计算区域,使之与正方形像素矩阵对应,并构造出基本图元,实现了用一个映射构造出多个平面排列图案的算法。

Bent-bonding of the cyclopropane molecule makes such a C-C bond insertion mechanism possible and reasonable.

反应产物的飞行时间谱经过处理可得到反应通道的平移动能分布及角分布情形,并从而推断其内能之分布情形。

Firstly,driving forces equations of each driving pair of the whole mechanism are established by combining D'Alembert Principle with virtual displacement Principle.

然后利用虚设机构法建立机构中杆件的速度、加速度的一、二阶影响系数矩阵,从而解决了少自由度关联机构惯性力求解中杆件的速度和加速度难以求解的问题。

It is easy to debug and interchange. Layout of system structure is set up.

建立了系统的整体布局,设定模块的功能,进行了运动分析,并给出了模块机构的设计方案。

After 20 years, Jacob Clarke returns home to say goodbye to his dying mother, where he finally shares his secret with his brother Tom, a well-known alien debunker.

从来反对外星人学说的贾滔和贾碧琪在看过雅的异能后均感到惊讶;二人及后从雅口中得悉事情始末,改变了他们的看法。

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推荐网络例句

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是,在否定句或疑问句里,这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷

Nusa lembongan : Bali's sister island, coral and sand beaches, crystal clear water, surfing.

Nusa Dua :豪华度假村,冲浪和潜水,沙滩,水晶般晶莹剔透的水,网络冲浪。