目标
- 与 目标 相关的网络例句 [注:此内容来源于网络,仅供参考]
-
To fulfill a TV guidance system task of fast recognizing and tracking missile target from sequential images including multiple interferences,a fast segmentation and target characteristic extraction algorithm of sequential images based on binary image index map was proposed.After the sequential images were processed to binary images,a Field Programmable Gate Array was used to scan the binary image once and an index map was built,and then Digital Signal Processing was used to scan the index map once.
针对电视制导系统需从包含多个干扰目标的序列图像中快速识别和跟踪导弹目标的要求,提出了一种基于二值图像索引图的序列图像快速分割及目标特征提取算法,在序列图像二值化后,只需由FPGA对其遍历一次就可得到一张含有目标信息的索引图表,再由DSP对该索引图表边遍历边计算就可得到图像所含目标的数量、面积、质心坐标、二阶矩不变量等特征。
-
Many new detection techniques are proposed, that include: To overcome the faults of cross-terms and short unambiguity range for the common Wigner-Ville Distribution , short-time Fourier transform and Gabor transform are applied to SAR moving target detection. To improve the detection performance of WVD in noise environment, a new technique based on the Cross-WVD is proposed. The application of fractional Fourier transform to chirp signal detection is analyzed and extended to SAR moving target detection. To eliminate the restriction of chirp-Fourier transform, a new modified definition is proposed and applied to SAR moving target detection. To detect multiple moving targets whose scattering intensities are different heavily, the CLEAN technique is combined with the above techniques and the ideal detection performance is achieved. At last, the whole dissertation is concluded.
具体的研究成果如下:针对常用的Wigner-Ville分布在多目标情况下存在交叉项,并且多普勒不模糊范围小的缺点,提出将短时Fourier变换和Gabor变换应用于SAR运动目标检测,分析了其优势所在;为进一步提高Wigner-Ville分布低信噪比条件下的信号检测能力,提出基于互Wigner-Ville分布的运动目标检测方法;分析了分数阶Fourier变换在线性调频信号检测中的应用,提出基于分数阶Fourier变换的运动目标检测算法;对离散Chirp-Fourier变换的定义进行了修正,提出修正的离散Chirp-Fourier变换,克服了限制其应用的约束条件,并用于SAR运动目标检测当中;强度相差较大的多运动目标检测历来是机载SAR技术的一个重点和难点,我们将CLEAN思想融入上述多种算法当中,良好地解决了该问题。
-
In degraded PSM matching classification, errors modification method of degraded PSM is presented and the matching tensor of every canonical scattering centers is given. In Chapter 4, the theory of wideband millimeter-wave radar target identification is introduced. It is indicated that, for HR radar target identification, description of temoral relations among features and pattern recogntion adaptive to variation of target angles are of key importance. A rule-based pattern recogniton method of sequential reasoning is proposed, which uses a series of rules to describe relations of features variation caused by target angles variation and has the advantages of adaption to unrandom variation and false probability control in classification over traditional statistical pattern recognitiop method. Feature extraction is crucial step in target identification. In range profiles identification application, features are extracted by means of range domain pre-processing algorithm, spacial and amplitude visual computation directly from range profiles and transform algorithm based on range profiles. Visual or transformed features are either sufficiently convinced or necessarily convinced and both of them are effective and robust to range profiles identification.
在第四章,首先对宽带毫米波体制背景下目标识别方法的一些特点进行了阐述并指出,在毫米波雷达目标识别中,特征之间动态关系的描述以及能适应目标姿态角变化的模式识别方法的研究乃是要解决的关键问题;进而提出了一种基于规则库的序贯推理模式识别新方法,在这种方法的研究中,主要包括序贯推理规则库的规则排列与特征选用顺序以及规则库的收敛等问题;这种方法克服了传统的统计模式识别方法特征利用效率不高、难以适应特征值的非随机性变化的缺点,把姿态角变化所引起的特征的变化用一系列规则加以表示,其优点是能适应特征值的非随机性动态变化,并能控制分类过程中的差错概率α;特征抽取是目标识别中的关键步骤,在基于目标距离像的特征抽取方法研究中,提出了距离空间域的预处理算法、距离空间域与幅度域的直观特征抽取方法以及基于目标距离像变换分析的特征抽取方法。
-
Reform the goal with development to orient according to the social security system,social security fund is it should is it give consideration to social goal,economic goal,political goal to insist on to raise for,give consideration to the long—term goal and short—term goal, realiz.e combining fairly with efficiency;The social security fund must divide the responsibility border among government,unit,individual to raise rationally,define that govemment and function of the market divide the work;Social security fund is it must pay attention to macroscopical system way choose,is it pay attention to micro technical design and application of field to want too atthe same time to raise for;Social security fund is it should take different raising the way for,raising the way for to different social security project to raise for;Social security fund is it should distinguish regular financial need raising waying,principling of raising the way for etc.different from provisional financial need to raise for.
根据社会保障制度改革与发展的目标定位,社会保障基金筹集应当坚持兼顾社会目标、经济目标和政治目标,兼顾长期目标与短期目标,实现公平与效率相结合;社会保障基金筹集必须合理划分政府和单位、个人之间的责任边界,明确政府与市场的合理职能分工;社会保障基金筹集必须重视宏观制度方式选择,同时也要重视微观领域的技术设计与应用;社会保障基金筹集应针对不同的社会保障项目采取不同筹集方式、筹集途径;社会保障基金筹集应区分经常性资金需要和临时性资金需要采取不同的筹集方式、筹集途径等原则。
-
The rate of other index overpassed rearranged objectives. Of which, the rate of VCT was 111.45%, the rate of receiving anti virus treatment was 108.42%, the rate of programs activities of government and non-government was 133.83%. At least there was one teacher trained living skills about AIDS. The fulfilling rate of the number of middle schools of developing living skill education about AIDS was 125.73%. The fulfilling rate of the number of middle school students educated about living skills was 147.53%.
其中自愿咨询检测人次数的目标完成率为111.45%;接受抗病毒治疗的艾滋病患者数的目标完成率为121.37%;获得关怀与支持的HIV感染者/艾滋病患者及其家庭数的目标完成率为108.42%;政府部门与非政府机构主动开展的项目活动数的目标完成率为133.83%;至少有一位教师接受过艾滋病生活技能培训,并对中学生开展艾滋病生活技能教育的中学数的目标完成率为125.73%;接受生活技能教育的中学生数目标完成率为147.53%。
-
The key of the simulation is to select a suited set of models and parameters which represent the motion and the echo of moving targets, Because the perform of microwave radars operating over the moving targets is very complicated.In this paper, we discuss how to simulate the motion of targets with a method of parameters simulation. And then we get a track clearly through controlling the flight parameters and the time increasing. The way reduces the error.This paper also particularizes the prime parameter of the echo--Radar Cross Section which is influenced by many factors.
对于目标的实时运动特性,本文采用了航迹的参数模拟法,通过控制目标的飞行性能参数与时间增量的大小来模拟目标的真实运动,避免了多种因素所引起的飞行误差,效果良好;此外,本文详细分析了表征运动目标回波特性的雷达截面积与雷达波长、目标姿态、极化方式及视角的关系,在此基础上,考虑了RCS的两种起伏特性以及天线对其的调制作用,得出了快、慢起伏目标回波的仿真数据,并对二者进行了比较。
-
By establishing a model based on the law of infrared radiation transmission in atmosphere and the characteristics of infrared imaging system for the apparent contrast between the target and the background, and analyzing the model over two wavebands to formulate the distance measuring formula and the distance resolving power formula, a passive distance measurement method is proposed for aerial point target distance measurement.
提出了对空中点目标进行被动测距的方法。基于红外辐射在大气中的传输规律和红外成像系统的特性,建立了目标和背景的表观对比度模型。通过对两个波段上对比度模型的分析,推导出了测距公式和距离分辨率公式。理论分析表明,只要得到大气在两个波段上的消光系数,通过测量目标在两个波段、两个时刻上的目标表观对比度,即可计算得到目标距离和目标径向速度,而距离分辨率则取决于系统的对比度探测能力及相关参数。
-
Comparative evaluation of the pricing strategy which induced by the single-objective and double-objective route guidance ,then the pricing result was given under the induction of double-objective route guidance , Numerical result shows that the single-objective route guidance, compared to the double-objective route guidance, will enhance the feasible region of traffic information pricing when traffic information quality is bigger than 0.1, finally, the respective interests of the profits of information users, information providers and the traffic manager who as the decision-making host separately are considered, ultimate price of the traffic information was 1.3 yuan, 2.6 yuan and 1.8 yuan.
用已建的模型对比评价了单目标和双目标两种路径诱导下的交通信息定价策略,并给出双目标路径诱导下的交通信息定价结果,研究结果表明,与双目标路径诱导相比,当交通信息质量大于0.1时,单目标路径诱导增大了交通信息定价的可行区域;最后当具有信息的出行者、交通信息提供者、交通管理者三方各自的利益为决策主体时,双目标路径诱导下交通信息的最终价格分别为1.3元、2.6元和1.8元。
-
The self-set goal group has the highest goal commitment, while the high difficult group has the lowest goal commitment.
在目标承诺上:四组的目标承诺有显著的差异,其中以自定目标组的承诺最高,其次是中困难目标组、低困难目标组,高困难目标组则承诺度最低。
-
The goal of building a welloff society in an allround way embodies an overall development plan including the following new tasks:to develop economy and reform,to improve spiritual civilization,to perfect socialist democracy and socialist politics,and to maintain a sustained development.
十六大报告提出的全面建设小康社会的宏伟目标,包含了极其丰富的内容,是将经济建设与改革的新目标、精神文明建设的新目标、政治文明建设的新目标、实现可持续发展的新目标等综合在一起的全面而系统的总体建设目标;包含了经济现代化、政治现代化、文化现代化以及生态现代化等全面现代化的多方面内容。
- 推荐网络例句
-
Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.
在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。
-
In fact,I've got him on the satellite mobile right now.
实际上 我们已接通卫星可视电话了
-
The enrich the peopling of Deng Xiaoping of century great person thought, it is the main component in system of theory of Deng Xiaoping economy, it is a when our country economy builds basic task important facet.
世纪伟人邓小平的富民思想,是邓小平经济理论体系中的重要组成部分,是我国经济建设根本任务的一个重要方面。