模拟数据

multi-channel correlators are widely used in traditional pseudo-random code cw radar,which makes the ranging system more complicated.this paper proposes a method of digitalizing the return signal directly and then convoluting the signals on dsp,which can replace multi-channel correlation in analog circuit.but the computation of convolution is too huge for the dsp to fulfill.to solve this problem,this paper analyzes five fast algorithms including fft,and then chooses one according to the characters of prc-cw radars.the digital method and fast algorithm have been verified by simulated signal and real signal.

一种提高空间伪码扩谱测距精度的实用。。。摘要：传统的伪码调相连续波雷达采用多路模拟相关电路实现对回波信号的相关接收，通过多路试探搜索各距离单元的目标，电路复杂。提出的数字化方案，对回波信号直接数字化，利用高速dsp实现数字卷积，可替代多路模拟相关电路。但是直接卷积的运算量过大，dsp无法承受。本文对此进行了研究，分析了包括fft在内的五种快速算法，结合prc-cw雷达的具体情况，确定了一种适于dsp实现的快速卷积算法。仿真和实测数据证实了数字化方案及快速算法的正确性。

multi-channel correlators are widely used in traditional pseudo-random code cw radar,which makes the ranging system more complicated.this paper proposes a method of digitalizing the return signal directly and then convoluting the signals on dsp,which can replace multi-channel correlation in analog circuit.but the computation of convolution is too huge for the dsp to fulfill.to solve this problem,this paper analyzes five fast algorithms including fft,and then chooses one according to the characters of prc-cw radars.the digital method and fast algorithm have been verified by simulated signal and real signal.

摘 要：传统的伪码调相连续波雷达采用多路模拟相关电路实现对回波信号的相关接收，通过多路试探搜索各距离单元的目标，电路复杂。提出的数字化方案，对回波信号直接数字化，利用高速dsp实现数字卷积，可替代多路模拟相关电路。但是直接卷积的运算量过大，dsp无法承受。本文对此进行了研究，分析了包括fft在内的五种快速算法，结合prc-cw雷达的具体情况，确定了一种适于dsp实现的快速卷积算法。仿真和实测数据证实了数字化方案及快速算法的正确性。

SWAT model is a kind of distributed hydrologic model with the ability to evaluate the effects of landuse change on hydrologic response. This model was applied in Cao River catchment of Miyun reservoir basin. First, the sensitive parameters were identified through sensitive analysis. Then, the calibration and validation for flow and sediment were performed from 1986 to 1991 at Xiahui gaging station. The results of model evaluation show that the streamflow was simulated excellently, and sediment is also well simulated.

将可表征土地利用变化对水文响应影响的分布式水文模型SWAT应用于密云水库潮河子流域，对模型的敏感性进行了分析，并采用1986~1991年下会水文站数据对其径流量和泥沙负荷进行了率定和验证，模型评估结果表明该模型对径流的模拟效果非常好，对泥沙的模拟效果较好。

METHODS:Analyzed 81 cases of CT dicom data by Mimics to evaluate details of orthopaedic injuries and diseases, and simulate fracture reposition,fixation and osteotomies ,and be used to preoperative discussion and doctor-patient communication,etc.

用Mimics对81例骨关节CT数据进行处理、分析，评估骨科伤病细节，模拟骨折复位及固定、模拟截骨、用于术前讨论、术前医患沟通等。

METHODS:Analyzed 81 cases of CT dicom data by Mimics to evaluate details of orthopaedic injuries and diseases, and simulate fracture reposition,fixation and osteotomies ,and be used to preoperative discussion and doctor-patient communication,etc.

用Mimics对81例骨关节CT数据进行处理、分析，评估骨科伤病细节，模拟骨折复位及固定、模拟截骨、用于术前讨论、术前医患沟通等。结果：Mimics能获得清晰三维图像，并可

The CFD software STAR-CD is used to simulate the normal operating conditions of cold and hot plenums in China Experimental Fast Reator. Complex 3-dimension model is established by using porous medium method. The temperature and velocity distributions of cold and hot plenums are given. These results are compared with the data of the thermal designs of CEFR which have been completed. Meanwhile, the influence of the buoyancy forces is analyzed.

应用计算软件STAR-CD对中国实验快堆正常运行工况中的额定工况进行了三维数值分析，使用多孔介质模型对屏蔽柱的影响进行了模拟，给出了冷热钠池的三维温度场和流场，与已有热工设计进行了比较，并著重分析了浮升力在数值模拟计算中的影响，为事故工况下的设备动态分析及相应的设备力学分析提供了数据。

The CFD software STAR-CD is used to simulate the normal operating conditions of cold and hot plenums in China Experimental Fast Reator. Complex 3-dimension model is established by using porous medium method. The temperature and velocity distributions of cold and hot plenums are given. These results are compared with the data of the thermal designs of CEFR which have been completed. Meanwhile, the influence of the buoyancy forces is analyzed.

应用计算软件STAR CD对中国实验快堆正常运行工况中的额定工况进行了三维数值分析，使用多孔介质模型对屏蔽柱的影响进行了模拟，给出了冷热钠池的三维温度场和流场，与已有热工设计进行了比较，并着重分析了浮升力在数值模拟计算中的影响，为事故工况下的设备动态分析及相应的设备力学分析提供了数据。

Last, based on the rumpling mechanism of elastic film on elastic-plastic metal layer, the evolution of oxidation localization area was simulated numerically

最后，基于在循环载荷作用下，附着在弹塑性金属基体上弹性薄膜的起伏机制，对循环氧化条件下，热障涂层氧化局域化区域的演化进行了数值模拟，对模拟结果和实验数据之间的差异进行了分析。

According to the construction course and finished dead state of the inclined tower cable-stayed bridge without back stay at Tongling Road in Hefei and combining the modern theory and method of the bridge construction control mentioned in this paper, established a space model by large-scale general finite element software ANSYS. It can obtain some valuable result by emulating analysis of the bridge which is under the construction course and finished dead state. It can provide an instruction for the Tongling Road bridge with the result and construction job site monitoring data.

文中根据合肥市铜陵路预应力混凝土无背索斜塔斜拉桥的具体施工过程和成桥状态，结合文中介绍的现代桥梁施工控制理论和方法，运用大型通用有限元软件ANSYS建立了三维空间模型，对该桥进行了施工过程和成桥状态下的结构仿真模拟分析，将模拟计算结果与施工现场振动频率法索力测试数据和分析结果相结合，为铜陵路无背索斜塔斜拉桥拉索张拉施工提供指导，及时调控，确保了该桥在成桥后线形美观，受力性能满足要求。

Vertical and horizontal distribution of the fuel was calculated from sample plots and tree biomass model, including fuel loading, thickness and height. Based on fuel distribution and wind simulation, fire spread rate, fire intensity, and flame height of surface fire and crown fire were calculated.

根据2000-2006年当地气象数据，确定历史平均最大风速的平均值和主风向，在此背景下对风场进行模拟，进而对地表火和树冠火进行模拟计算，计算出不同类型火发生时火蔓延速度、火强度和火焰高度的分布图。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。