Many scholars thought that the conventional simulation was easy to omit the target, sod CT outlined precise target location, which favored to radiotherapy plan design sod the target area dosage distribution.
诸多学者认为，常规模拟定位容易遗漏靶区，CT定位靶区匀画精确，更利于放疗计划设计及靶区剂量分布。
The thesis takes this as to research background to investigate the key technologies about computer simulation related during the ballistic target boost phase. The main contents include follows:（1）The research method of radiation calculation.
本文以此为研究背景研究弹道目标推进段计算机仿真的相关关键技术，主要内容包括：（1）辐射量的计算方法研究。
The main contents are as follows:(1) Configuration design and Experiment research The projectile configuration of penetration weapon is designed according to the technical and tactics target, including the structure design of the projectile, the structure design of the empennage and the structure design of the concrete target. The simulation experiments studying the relation between velocity and concrete intensity and penetration depth have been carried out.
主要内容如下：(1)结构设计和试验研究根据技术指标完成了子母弹侵彻战斗部模拟弹体的尺寸和结构设计，尾翼的尺寸和设计结构、靶体尺寸和结构设计，完成了模拟弹丸混凝土的模拟试验，研究靶体强度和初速度对侵彻深度的影响；通过对结构设计的研究和弹丸侵彻混凝土的试验研究，完善钻地弹设计方案。
Aiming at the high speed moving target, the simulation results show that under the case that the Hamming window is used to weight the synthetic spectrum, the target range profile does not have grating lobe and the peak-to-side lobe ratio of that is -42 dB below.
针对高速运动目标的仿真结果表明，在采用海明窗加权的情况下，与基于低速运动模型的频域合成带宽法相比，所提方法得到的距离像没有出现栅瓣且副瓣电平在-42dB以下。
The simulation results show that the proposed algorithm is fast and effective to solve the data association of multiple target tracking.
仿真结果表明，该方法可以快速、准确的排除虚假定位点，能够有效的对多个目标进行跟踪。
Abstract］ objective to study the technique and the clinical application of ct simulative scanning in three-dimensional conformal therapy. methods we reviewed 768 cases with tumor of body, neck and head performed ct simulation positioning scanning. one fixation mode including frame and underpressure sack, the other fixation mode including fixing plate and thermoplast facio-mode. results the course of ct simulation was performed on the reconstructed imaging, the target was exactly confirmed by ct scan, to choose suitable parameter, collect exact data and measure ct were important to conformal radiotherapy. conclusion ct simulation orientation is of great value for conformal radiotherapy.
目的 探讨三维适形放疗中ct模拟技术及其临床应用价值。方法回顾分析768例头颈部及体部多种肿瘤的ct模拟定位病例。患者体位固定方式：（1）采用框架+负压袋固定；（2）专用定位板+热塑面模固定。结果 ct模拟过程在ct重建图像上进行，ct扫描能精确确定肿瘤靶区。但要注意：ct扫描参数的掌握，数据的精确采集，ct值的测定等能满足适形放疗的需要。结论 ct模拟定位在适形放疗中有重要价值。
In these circumstances, supported by NUDT Innovation Foundation, this dissertation selects low altitude radio fuze as research object, and concentrates its attention on the research of key technologies, such as target properties, fuze channel property, echo model, distance measuring arithmetic and digital simulation system design, etc.
基于以上原因，论文在国防科技大学创新基金的资助下，以低空无线电引信为研究目标，对引信的目标特性、信道和回波模型、测距算法以及数字仿真系统设计等关键技术进行了研究。
Based on the general concept of inverse synthetic aperture radar and signal processing, the simulation of ISAR 2-D imaging for missile target under compensation methods of autocorrelation fast motion and accumulation correlation was studied according to missile flying model of flying trajectory, autorotation and precession in this paper.
在逆合成孔径雷达成像基本原理及信号处理过程的基础上，根据导弹的飞行弹道、自转和进动模型建立导弹飞行模型，采用自相关快速运动和累积相关运动两种补偿方法，对导弹目标的ISAR二维成像进行了仿真研究。
The object of this study is to determine whether elevation could be used to enhance the accuracy of prediction of soil organic matter spatial patterns and the accuracy of modeling the prediction uncertainty. The study was conducted on a area in Pinggu district of Beijing. Soil organic matter was used as target variable. The sequential Gaussian simulation accounting for single attribute and the sequential Gaussian co-simulation accounting for elevation secondary information were used for simulation of the soil organic matter. Thus, the results of the two methods were compared.
为了探讨在条件模拟计算环境下，是否可以利用高程数据辅助提高土壤有机质空间变化的预测精度及相应的预测不确定性模拟的准确性，该文在北京市平谷区内选取研究样区，以土壤有机质作为目标变量，一方面利用序贯高斯模拟法对土壤有机质的空间分布进行模拟，另一方面以高程作为辅助信息，利用序贯高斯协模拟法对土壤有机质的空间分布进行模拟，然后对两种方法的模拟结果进行对比分析。
OMTs manufactured by homogeneous waveguide sections are very popular for their good mechanical intensity, high power capacity and upstanding stability. In this dissertation, the OMTs about above-mentioned will be deep and systematically researched from the following aspects:i Computing procedure of Finite-Difference Time-Domain Method isbriefly introduced, followed by detailed discussion of different absorbing boundary conditions and excitation sources. FDTD numerical method suitable for waveguide analysis can be obtained. ii Millimeter-wave OMTs are analyzed by FDTD programs. The simulation results from HFSS are well agreed with those using FDTD numerical method, which can validate the efficiency of the proposed numerical technique, iii The experimental OMT is manufactured and measured. Testing results reached design target. Those lay a technical foundation on dual polarization communication and exploration systems. iv General introduction is put forward about two kinds of wideband OMTs with complicated structures and different excitations. Field distribution and characteristic parameters are obtained with HFSS software. The above research is very valuable and helpful to development of wideband OMTs.
由于采用均匀波导实现的正交模转换器具有机械强度好、功率容量大和可靠性高等优点，因此本文对采用均匀波导实现的正交模转换器进行深入系统研究，具体研究工作如下：1 简要阐述了时域有限差分法(Finite-Difference Time-Domain Method)，对不同吸收边界条件及激励源设置进行了详细的比较分析，得出了适用于波导分析的FDTD计算方法； 2 采用FDTD数值方法对毫米波窄带正交模转换器进行分析，分析结果与HFSS仿真结果吻合较好，验证了本文所研制的分析软件的有效性； 3 设计并研制了毫米波窄带正交模转换器，测试结果达到设计指标，为毫米波双极化探测系统的研制奠定了技术基础； 4 简要介绍了两类结构较复杂、激励方式不同的宽带OMT的设计思路，借助HFSS分析了场结构并给出参数仿真曲线，为近一步开展毫米波宽带OMT的研制提供理论设计基础。
The simulation result shows that the earth background and the earth light are the primary factors which influence space-based optic observation. On the aspect of observation time, it has limited efficiency for low earth orbit target space-based observation, and good efficiency for high earth orbit observation.
仿真实验结果表明，地球遮挡与地光条件是影响天基空间目标光学可见的最主要因素；在可见时间方面，天基空间目标光学监视系统对低轨目标的监视能力有限，而对高轨目标具有良好的监视性能。
Because the GDI engine can be operated in multiple combustion modeand after-treatment apparatus differs from traditional gasoline engines, its control strategyunder transient working condition is therefore different. Nonlinear dynamic model of the GDIengine is proposed in this dissertation. Coupled with PID control, air-fuel ratio-dominant andspeed-dominant system simulation models are developed under the MATLAB/SIMULINKdeveloping environment using the air-fuel ratio and engine speed as feedback signals. Resultsshow the closed-loop control models not only can modify the bias of air-fuel ratio or enginespeed, but also can shorten the adjustment time of the random offset from target.
因为直喷式汽油机可以运行在多重燃烧模式，以及后处理装置的差异，其在过渡工况下的控制策略与传统以当量混合比燃烧的汽油机相比有着很大的不同，本文探讨了直喷式汽油机非线性动态模型，并引入PID控制，利用宽带氧传感器信号和转速作为反馈信号，使用MATLAB／SIMULINK的开发环境开发了以空燃比控制和转速控制为主的系统仿真模型，仿真结果表明，闭环控制模型不仅可以对发动机的空燃比或转速偏差进行反馈修正，而且缩短了目标值随机偏差的调整时间。
In other words, that there is not nonˉs olution problem in theory. Simulation is made, and the influence of baseline length and measurement error on ambiguity p roblem is also analyzed. The position RMS error of target is given.
同 时，文中还对定位模糊问题进行了分析，并通过仿真对模糊问题受测量精度、基线长度等因素影响的情况进行了研究，给出了目标跟踪精度图。
From the detailed simulation results and analysis, for the emulational frame based on minimum zone set, the route discovery mechanism of DSR is independent of nodes mobility, every once, the source node acquires a route to a target node which its relative position is alterant, the routing time is steady but not be effected by nodes mobility, the conclusions are obvious helpful for reducing route tip and increasing routing efficiency.
通过对选取总路由流量，路由平均跳数、平均路由发现时间的实验数据分析发现，对于基于最小区域集的仿真框架，DSR的路由发现机制并不受节点移动性的影响，每次源节点获得一条到达相对位置已改变目的节点的新的路由的时间并不受节点的移动性影响而趋于稳定，可明显减少路由跳数，增加路由计算效率。
The simulation results showed that the method was efficient in restricting the fluctuation of operating conditions to achieve the production target of high coke yield and good coke quality at low energy consumption.
系统仿真结果表明，该方法能有效地抑制工况的波动，达到高产、优质、低耗的生产目标，为复杂工业过程的建模和优化控制提供了一种新思路。
Simulation results show that the method can obtain the target motion factors with certain accuracy in a shorter time.
大量的仿真试验证实，该方法能在相对短的时间内得出一定精度的目标运动要素，从而实现线导鱼雷的远距快攻。
A simulation system for multi-dimensional population submodel embedded in an economic model of dynamic input-output type is presented. The simulation output is intended to replicate China's situation in target-oriented development under various policy designs. The recursive accounting framework in the system is assembled with intra-period and inter-period blocks.
本文研究发展过程中产业结构高度化导致的就业结构变化和人口城乡迁移，并建立以动态投入产出框架为主干的经济模型，与多维人口预测模型相耦合构成仿真系统，为了对迁移人口的规模及年龄，性别结构作内生化处理，文中提出了一种计算模式。
Modulation of the online system, the text will be AM, with bilateral and single sideband for that object, from the basic principles, and other aspects of analysis and simulation analysis on while in nonlinear Modulation, as commonly used FM and Phase Modulation for that target on its modulation principle, for example simulation and analysis.
在线性调制系统中，文中将以调幅、双边带和单边带为说明对象，从原理等方面进行分析阐述并进行仿真分析；而在非线性调制中，以常用的调频和调相为说明对象，说明其调制原理，并进行举例仿真分析。
Testing methods and properties of the laser plasma shock wave is studied in this paper by analyzing the experimental, data simulation and theoretical result in the lit threshold, the mechanism of action between Laser-Supported Detonation Wave and component of plasma and gas with the variation of laser power density Based on the phenomena of laser supported combustion or detonation wave occurs because of the interaction between the high-intensity laser and material, a new method is present for diagnosing the ignition threshold of laser supported detonation wave by measuring the jump of the sound peak pressure of laser-target plasma.
本文对激光等离子体冲击波的测试方法和特性进行了研究，对激光支持爆轰波的点燃阈值、激光支持爆轰波的冲量耦合过程及其激光吸收区内气态粒子和离化粒子的组分进行了实验、理论、数值模拟的分析工作。
A practical simulation system, which can simulate DOA data and pulses with a propagation delay for every target path, is designed, and a real time tracking processor model is studied also.
系统可模拟在各种航迹下的DOA数据和具有传播延迟的视频脉冲，并对其进行实时测量和预处理，最终形成跟踪结果。