预方案
- 与 预方案 相关的网络例句 [注:此内容来源于网络,仅供参考]
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In this dissertation, based on the extraction of meaningful polarization information, the polarimetric speckle reduction, polarimetric contrast enhancement, polarimetric classification and ship detection in polarimetric SAR images are systemically studied. During the study, some new concepts and methods are introduced, which are supported by the application to measured Pol-SAR data. The innovations of this dissertation are as follows: 1 A simplified schem is proposed to reduce the complexity of scattering-model-based speckle filtering. 2 Extend the expression of polarimetric correlation coefficient to help distinguishing targets. In addition, introduce the quantized parameters of polarimetric signature so as to show the differentiae in quantity in co-polar power, cross-polar power and shapes of polarization signatures among targets. 3 Define a new parameter of difference degree between targets, which can be used for express the difference between both coherent and distributed scatters.
论文在较系统的研究目标特征量提取方法和特征量所包含的物理意义的基础上,对极化SAR图像降斑、极化对比增强、极化SAR图像分类以及极化SAR图像中海上舰船目标检测等方面进行了研究,并提出了一些新的概念和方法,对实测数据的处理结果表明,这些新的概念和方法对于极化SAR信息处理是有效的,本文的主要创新成果包括以下方面: 1)针对基于预分类的MMSE极化降斑方法实现过程非常复杂的问题,提出了简化方案,并验证了方案的有效性; 2)扩展了极化相关系数的表示方法,这种扩展增强了极化相关系数对目标的区分效果;另外还提出了极化特征图量化参数,可以从量上表征不同目标间相同极化和交叉极化的回波功率差异和极化特征图形状差异; 3)定义了目标间的差异度参数,它不仅可以用于描述相干目标,还可以用于描述分布目标的差别程度。
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Based on the optical configuration of laser facility prototype,a precise energy control program of preamplifier system using half-plate and polarizer was fixed.
基于原型装置的光路设计,确定了采用半波片和偏振片实现对预放系统输出能量的精密控制的方案,并对该方案进行了流程设计和系统集成。
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For the problem that the suppression of co-channel interference and suppression of noise can't be balanced in signal-to-jamming and noise ratio maximization method for the linear precoding of multiuser multiple-input multiple-output downlink systems, an improved scheme that the term of noise variance is modified as a piecewise linear function is proposed, in which the balance between suppression of co-channel interference and suppression of noise can still be maintained even when the noise variance is a small value through piecewise modifying the term of noise variance, and thus the bit error rate and capacity of the systems are further improved.
针对多用户多输入多输出系统下行链路线性预编码的信干噪比最大化方法中,共信道干扰抑制和噪声抑制不能有效平衡的问题,提出将其中的噪声方差项修正为以噪声方差为变量的分段线性函数的改进方案。该方案通过对噪声方差项的分段修正,在噪声方差的值较小时依然能够保持共信道干扰抑制和噪声抑制间的平衡,从而使系统的误比特率性能和容量得到进一步提高。
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Patients were not remission or combined with hematolysis, and there was not a donor coincided with human leukocyte antigen matching. If after Bu-CTX2 preconditioning, ciclosporin A plus methopterin schema is used for preventing graft versus host disease, many complications, low success rate or high reoccurrence rate can be detected.
受者为未缓解、合并溶血病例,且无人类白细胞抗原配型相合的血缘供者,如予Bu-CTX2方案预处理,单用环孢素A+甲氨蝶呤方案预防移植物抗宿主病,则面临并发症多、移植成功率低或移植后易复发等难题。
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The proposed key predistribution scheme has advantages over random key predistribution scheme in its security and only spends moderate computation cost so it is quite practical.
与随机密钥预分配方案相比,本方案在健壮性和安全性方面具有一定的优势,其计算和存储开销也不大,具有一定的实用性。
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The analysis results show that this scheme doesn't need additional memory space and increases the probability that neighbor nodes have the same key space. Compared with the pairwise key predistribution scheme, this scheme can increase the threshold of captured nodes and improve the security of WSN, and fits the network environment and meets the security requirements of WSN.
分析表明,该方案在不增加存储空间的情况下,提高了邻居节点拥有相同密钥空间的概率,并且与多密钥空间密钥对预分布方案相比,可大幅提高被俘节点的阈值,增强了网络安全性,能够较好地适应无线传感器网络的网络环境和安全要求。
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The proposed hexagon-based key predistribution scheme belongs to static key management schemes.
本文提出了一种静态****管理方案——基于正六边形的****预分配方案。
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To further enhance the security and connectivity for wireless sensor networks,proposed an improved key management scheme.Introduced the scheme,a random key predistribution using multiple key spaces and multipath key reinforcement was based on group-based deployment model which in the paper of DU Wen-liang.
为了进一步提高无线传感器网络的安全连通性,在分析DU Wen-liang等人的group-based节点投放模型的基础上,提出了一种改进的密钥管理方案:多密钥空间与多路径增强相结合的随机密钥预分配方案。
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Using data of the traffic flows in the current cyc le and the cycle before, the traffic flows in the next cycle may be estimated th rough the linear pre-estimation method and each phase time in next cycle is dete rmined with GA optimizing method.
通过对本周期及前一个周期的车流量进行实时测量,采用线性预估方法,对下一个周期的车流量进行预估,以最大通行能力为路口模型控制性能指标,从而确定下一周期的相位配时方案。
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A software for aided designing bolt of tunnel named ANSYSBOLT was designed on the basis of ANSYS finite element software. In the software environment, bolt supporting model of physical tunnel in tectonic stress field was structured according to physical parameters of coal and rock seam of some working face, and in conditions of different buried depth, bolt supporting structure and pre-tightening force, distributions of stress of surrounding rock of physical tunnel and its displacement were analyzed and calculated by ANSYSBOLT software. Then influence of different buried depth, bolt supporting structure and pre-tightening force on stability of roof and floor of tunnel was analyzed and finally feasible scheme of bolt supporting was gotten according to the analysis result.
在ANSYS大型有限元软件基础上开发了巷道锚杆辅助设计软件ANSYSBOLT;在该软件环境下,根据某工作面煤岩层的物理参数,建立了构造应力场条件下的实体巷道锚杆支护模型,并按照不同的埋藏深度、锚杆支护结构和预紧力条件,经软件分析计算,得出了实体巷道围岩应力及位移分布情况,进而分析了不同埋藏深度、锚杆支护和预紧力条件对巷道顶底板稳定性的影响,最终根据分析结果得出了可行的锚杆支护方案。
- 推荐网络例句
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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。
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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。
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You rap, you know we are not so good at rapping, huh?
你唱吧,你也知道我们并不那么擅长说唱,对吧?