迭擇性的 的英文怎麼說
中文拼音 [diězháixìngde]
迭擇性的
英文
selective-
In the self - calibration scheme, the thesis emphasizes the accuracy of camera intrinsic and extrinsic parameters. we presents an accurate f method based on corresponding point adjustment. the method adjusts coresponding points according to the fixedness of projective transformed cross ratio, then calculates f matrix accurately through linear and non - linear methods. when computing intrinsic parameter, a matrix, we simplify the step, and stress on the two important parameters of a. the result will be getten through solving kruppa equation based on svd decomposition. in order to compute extrinsic parameters, we use linear method to get initial r and t, then apply non - linear method to accurate them
提出了基於匹配點調整的f求精方法，先根據攝影交比不見性對手工選擇的匹配點進行調整，再用線性、非線性結合的方法求精f矩陣；在計算內部參數a中，進行了一定的簡化，把重心放在a中重要的兩個參數上，用svd分解法計算kruppa方程；在計算外部參數時，首先用線性法求解r 、 t ，然後再用非線性法迭代求精。Abstract : based on the iterative bit - filling procedure, a computationally efficient bit and power allocation algorithm is presented. the algorithm improves the conventional bit - filling algorithms by maintaining only a subset of subcarriers for computation in each iteration, which reduces the complexity without any performance degradation. moreover, a modified algorithm with even lower complexity is developed, and equal power allocation is introduced as an initial allocation to accelerate its convergence. simulation results show that the modified algorithm achieves a considerable complexity reduction while causing only a minor drop in performance
文摘:基於迭代的比特和功率分配機制，提出了一種低復雜度的比特和功率分配演算法.與傳統的迭代分配演算法不同，該演算法在每次迭代中只需要比較幾個特定的子載波.該方法在保持傳統迭代演算法性能的前提下極大地減小了迭代分配演算法的復雜度.此外，通過選擇等功率分配方案作為初始方案加快了演算法的收斂速度，進一步降低了演算法復雜度.模擬結果表明，提出的改進演算法在基本不犧牲系統性能的前提下有效地降低了演算法復雜度Fourthly, because of the fluctuation of grouping efficacy during the fcm iteration process, the iteration solution selecting procedure is put forward, with which the infeasible solution of last iteration will not be selected. 5
第四，針對fcm迭代過程中製造單元構建方案成組效率的波動性，提出了迭代方案選擇方法，基本避免了fcm選擇的最終迭代方案不可行的問題。Aim at ubiquitous parallel multi - reservoir structure in our country ' s basin, the universal objective function including coefficient bi embodying a spatial significance difference at different flood control points and variable ai denoting a selection of scheduling mode is established, which provide a valid intervenor interface for flood control consultation decision. according to the real - time requirement, a model of reservoir storage allocation is proposed, which embody basic idea of phasic compensation. passing the dynamic correction to cut down the disadvantageous influence that indetermination result in on the certain degree, joining together the step alternation solving method, this model can maximally consider bias of decision makers, ensure the rationality and practicability of the solutions
針對我國流域中普遍存在的並聯庫群結構，論文提出包含不同防洪點重要性的系數_ i和選擇調度模式的變量_ i的通用目標函數，為防洪會商決策，提供了有效的人工干預介面，根據實時性要求提出動態分配防洪庫容的庫容分配方法，體現了相機補償的基本思想，通過動態修正在一定程度上可以削減不確定性造成的不利影響，結合分步迭代求解技術，能最大限度體現決策者的偏好，保障解的合理性和可操作性。This paper exhausts fully adjustable factor which could amend the dynamic function in fuzzy control system, and that traditional algorithms select factors with intercession is easy to get a partial solution, so this paper presents a new method to select factors based on genetic algorithm. this method has a large range over covered the solutions which could benefit to search the best solutions. it has great character and advantage
本文充分闡述了可調整因子在模糊控制中能夠改善了系統的動態性能，並根據傳統的優化演算法在選取控制因子時是從單個初始值迭代求取最優解的、很容易陷入局部最優解這一問題，提出了一種基於遺傳演算法的可調整因子的選取方法，這種方法覆蓋面比較大，有利於全局擇優。Furthermore, in the last part of this paper, based on the simulation results, some problems of artificial neural network algorithm are addressed
收斂性是神經網路校正演算法的關鍵問題，本文最後對此進行了理論探討並根據模擬結果對其迭代步長進行選擇。Both methods provide good performance, and the latter is better since it can give a better describing of the residual distribution of matches. in the study of camera self - calibration, firstly, based on discussion of using and the selecting of scene constraints, two new robust vanishing point estimation algorithms are presented. one is based on peransac, and the other is based on clustering
在相機自定標技術的研究中，首先，在討論利用和選擇景物約束的基礎上，提出兩個新的消失點估計演算法:基於peransac的估計演算法和基於聚類分析的估計演算法，後者在估計精度上優於前者;其次，提出了綜合利用空間平行線約束和相機主點位置約束的線性迭代自定標方法，提高了相機自定標的魯棒性。Genetic algorithm is a kind of stochastic whole - searching regression algorithm, which is built on natural selection and molecule genetic mechanism, as a kind of universal algorithm to optimize the problems of complicated system, it is widely used in many fields due to its suppleness, universality, well self - fitness, robustness and fitness for collateral process, as a kind of bionic algorithms, the research on ga ' s application keeps far ahead of its theoretic research
遺傳演算法是藉助生物界自然選擇和遺傳學機理而建立的一種迭代全局優化隨機搜索演算法，是一種求解復雜系統優化問題的通用框架。它不依賴于問題的具體領域，具有簡單、通用、較強的自適應性和魯棒性，以及適于并行處理等顯著特點，因此被廣泛應用於眾多領域。作為一種仿生演算法，遺傳演算法的應用研究遠遠領先於演算法的基礎理論研究。We focus our attention on the ilc architecture of using feedback and feedforward actions in order to improve the robustness of the ilc scheme. this dissertation aims to develop new methodologies for robust ilc design that involves a tradeoff between rapid convergence and good tracking performance. these design methods are systematic to resolve the problem of choosing the parameters in learning law and enhancing the utilitarian of ilc
為了加強演算法的魯棒性，重點採用同時具有反饋與前饋作用的開閉環綜合迭代學習控制結構，旨在給出同時兼顧收斂性和跟蹤性能的魯棒迭代學習控制律的設計方法，避免學習律參數選擇的盲目性，拓寬迭代學習控制的應用范圍，加強迭代學習控制的實用性。Based on the simulation results, the key techniques for the design of turbo codes, including the choice of component codes, the design of interleaver, trellis termination schemes and puncturing methods, are discussed deeply. by measuring the statistical characteristic of extrinsic information from component decoders, new iterative stopping criteria and snr estimation updator are devised. also, it is used to implement synchronization of carrier phase
本文首先對turbo碼的基本編譯碼原理進行分析，在模擬結果的基礎上對turbo碼設計中的分量碼選擇、交織器設計、編碼器狀態歸零方案以及刪余方式等部分關鍵問題進行探討；通過考察外部信息的統計特性，設計了新的迭代停止準則和snr估計更新器，並利用外部信息實現串聯載波相位同步；最後對turbo均衡進行簡要分析。For example, it is difficult to ensure the reasonability of schedule risk analysis object and topn schedule risk factors, the optimization of schedule plan is always broken by schedule risk management measures, and few researches fully considered activity iteration and overlapping in r & d project. to solve these problems, this thesis takes schedule risk analysis process integration as guidelines, presents a r & d project schedule risk analysis method based on process integration ( srabpi ), which provides a new way and new methods for schedule risk analysis of r & d project. the main contents and fruits of this thesis are outlined as follows : firstly, srabpi idea is presented and srabpi framework is constructed from several aspects such as body, connotation, processes, methods, management organization, and relations between srabpi and project risk management
本文針對經典進度風險分析方法中存在的進度風險分析對象的合理性難以保證、 topn進度風險因子選擇難和進度風險管理措施影響進度計劃最優性等普遍性的問題，綜合考慮研發項目活動迭代和重疊等特點，以進度風險分析的過程集成為指導思想，研究提出一套基於過程集成的研發項目進度風險分析（ srabpi ）方法，為研發項目進度風險分析提供了新的途徑和新方法，論文的研究內容和主要貢獻如下:首先，提出研發項目srabpi思想並從主體、內涵、過程、方法、組織管理及其與項目風險管理的關系等多個方面構建了srabpi框架。From simulation results, we get the following main conclusions : 1 ) the convergence performance can be improved with the ist - tap initialization strategy for the underwater acoustic channel established in this paper. 2 ) both the convergence rate and the steady - state value of the average squared error should be taken into account when choosing the step - size
得到的主要結論為：對于本文所建立的水聲多徑通道，盲均衡演算法採用第一個抽頭初始化方案其收斂性能較好；選取迭代步長時要兼顧收斂速度和穩態誤差；在保證收斂性能的基礎上，可選擇階數較小的均衡器。分享友人