查询词典 unknown background

According to the fuzzy inclusion relation of the integrative decision making value expressed by the unknown attribute weight and the subjective preference, a fuzzy linear programming model is suggested to solve the unknown attribute weight. In addition, the related extension of this model is developed.

根据含未知属性权重的被评价方案的综合评价值与决策者主观判断的模糊包含关系，提出采用模糊线性规划模型求解属性权重，并研究模型的应用范围。

The findings knew that the ships collision is a type of an act of tort , its liability asks to recompense is looks carefully the state of fault to decide , generally may divide into the force majeure or the unknown cause collision , the mutual fault of both sides collision and so on , because if the force majeure or the unknown cause collision , undertake voluntarily by the victim , if an error of the side undertakes the damage compensate responsibility by the inflicter , when if both sides have mutually to cause its faults , basically it depends on the fault to share , but if it's unable to judge the proportion then the average to share is necessary.

研究结果得知，船舶碰撞为一典型之侵权行为，其责任求偿乃端视过失型态而定，一般可分为不可抗力或不明原因之碰撞、单方过失碰撞及双方互有过失碰撞等，而若因不可抗力或不明原因之碰撞者，由受害人自行承担，若纯为一方之过失者则由加害者承担损害赔偿责任，若因双方互有过失所造成时，原则上依过失程度分担，但若无法判定比例时则平均分担。

In our thesis, contents are organized as following In Chapter 1 we present our topic's internal and overseas research situations, theoretical and practical significance, and introduce the research object and contents, and the main contributions of this dissertation. Chapter 2 reviews the development of the stability results for nonlinear systems and some relevant recent results, which include Lyapunov and LaSalle-Yoshizawa theorems for nonlinear systems, and stochastic edition for stochastic nonlinear systems. Sontag's formula for systems affine in control is presented in the frame of CLF. The concepts of disturbance attenuation and the inverse optimality are also explained in this Chapter. In chapter 3 we present the solvable theorem of inverse optimal gain assignment problem, design the inverse optimal controller and the inverse optimal tracking controller for strict-feedback nonlinear continuous systems with unknown time-varing bounded disturbances and constant unknown parameters using an adaptive backstepping algorithm, which are nonlinear, continuous and are easier to realize. These designs are fully systematic and the algorithm can be directly coded in symbolic software. The results of simulation show the effectiveness of the control algorithms.

论文的结构如下：在第1章中，给出了本文研究课题的研究现状、理论意义和实际应用，并介绍了本文的研究对象、研究内容以及主要贡献；在第2章中，针对确定性非线性系统和随机非线性系统，分别介绍了Lyapunov定理、LaSalle-Yoshizawa定理及其随机版本；对仿射系统，在控制Lyapunov函数框架下，给出了Sontag公式；同时给出了非线性系统扰动抑制和逆最优控制问题的基本概念；在第3章中，针对具有未知时变有界扰动和未知定常参数的一类不确定非线性系统，给出并证明了逆最优增益配置可解定理，使用自适应Backstepping算法和均值定理，系统地设计了自适应逆最优控制器和逆最优跟踪器，这种设计方法可同时获得逆最优控制策略和自适应律，简单明了，仿真结果表明该控制算法的有效性，并给出了性能估计。

"Hazy" Good ambiguous name, yesterday in a rare fog enveloped the entire City, a very silly sense of visibility below 10 meters, just go out would be a kind of very exciting feeling, in that space of the Mist stay for a long time, feeling a boring person can not see anything, can only be seen a few zero-Mist dilute the flashing lights of the cars, you do not know what the status outside the 10 meters, or even the traffic lights, you do not know what you will face is how the situation, everything is unknown, that Mende feeling may just be time for everyone to face the unknown of a mind's instinctive reaction to fear.

"雾蒙蒙"好暧昧的一个名字，昨天一场罕见的大雾笼罩整个岛城，很懵懂的感觉，能见度低于十米，刚刚外出会有种很兴奋的感觉，在那种蒙蒙的空间里呆久了，感觉很闷，看不见任何东西，只能蒙蒙中见到几个零稀的车灯在闪烁，你可以不知道十米以外是怎样的状况，甚至是红绿灯，你也不知道你将面临的是怎样的状况，一切都是未知，那种闷得感觉，可能只是每个人面临未知时的一种内心恐惧的本能反应。

In Chapter 6, different from the traditional adaptive control that mainly deals with unknown parameters, nonparametric adaptive control for unknown structures is introduced by using the nonparametric estimation methods developed in Statistics.

在第6章，与传统的主要对付未知参数的适应控制不同，引进针对未知结构的非参数适应控制，其利用了统计学中发展起来的非参数估计方法。

As one part of the project, the dissertation is developed with thelocalization problem in mobile robot navigation. Combined with "MobileRobot 1 of Central South university (MORCS-1)", a mobile robot designed byus that equipped with a 2D laser measurement system to sense the environmentand the proprioceptive sensors such as the odometry, gyroscope to calculate itsdead reckoning, the approach about the four kind uncertainty factors of mobilerobot localization is studied. These researches include that the error analysisand calibration of position sensors is implemented to reduce the measurementnoise, the 3D kinematic model of mobile robot is built to gain the accuratepose in complex terrain, some work on the automatic detection of static ordynamic obstacles based on laser scanner is investigated to eliminate thedynamic influence of the environment and to realize the reliably absoluteposition, and lastly a robust algorithm is presented to involve the incrementalenvironment mapping and self-localization of mobile robot with unknown dataassociation and to improve the self-localization performance of mobile robotunder unknown environment.

作为该项目研究的一部分，本论文以移动机器人导航中的定位问题为研究内容，利用自行研制的装配有二维激光雷达环境感知系统，并通过里程计、陀螺仪等内部传感器来实现航迹推测的移动机器人"中南移动1号MORCS-1"，重点围绕影响移动机器人系统定位的四类不确定性处理展开研究：通过移动机器人定位传感器的误差分析及校准，旨在消除传感器噪声所带来的测量误差；通过建立移动机器人的三维运动学模型进行航迹推测，以期实现复杂地形下精确的移动机器人本体姿态感受；通过基于激光雷达的动静态障碍的自主检测等相关研究，尽量消除环境的不确定因素影响进而实现可靠的移动机器人绝对定位；通过以上研究，针对未知数据关联下移动机器人增量式环境建图与自定位的研究提出一种鲁棒的滤波算法，改善未知环境中移动机器人自定位的性能。

This paper presents a new method to estimate unknown projections. To achieve better results, we make use of the discrete Radon transform and a set of discrete orthogonal Tchebichef polynomials to establish relationship between the projection moments and the image moments, and then estimate the unknown projections from the known projections using this relationship.

提出一种新的投影数据估计算法，利用离散Radon变换和Tchebichef正交多项式建立图像矩和投影矩之间的关系，并用这种关系从已知投影数据中估计未知投影数据，达到提高重建图像质量的目的。

I thought of their unfathomable distance, and the slow inevitable drift of their movements out of the unknown past into the unknown future. I thought of the great precessional cycle that the pole of the earth describes.

我想到它们远不可测的距离，它们缓慢的不可避免的运动，从木可知的过去走进不可知的未来，我想到地球运转时画出来的一个巨大的圆。

By the iterative functional equation we usually mean an equation containing at leastan n-th iterate〓of an unknown function.A relatively general form of it is〓(1)where〓is a given integer,J is a connected closed subset of the real number axis R,G is a given〓function from〓to R,and f is an unknown function to be solved.

迭代函数方程通常是指含有未知的函数并含有它的至少2次迭代的方程，它的一个比较广泛的形式是〓，对任〓，（1）其中〓是个给定的整数，J是实数轴R的一个连通闭子集，G是个给定从〓到R的〓映射，f是个未知而待求的函数。

Secondly, based on the different structure characteristics and additional conditions, we study several kinds of inverse problems of pseudoparabolic equations. One is a kind of pseudoparabolic inverse problem of identifying a constant coefficient solved by combining the formal solution of the problem and the additional condition properly. The second is the pseudoparabolic inverse problems of identifying an unknown boundary function and an unknown source term solved by using the Riemann function method to get the formal solution of the problem and then using the additional condition to transform the problem into a Volterra integral equation of the second kind. The third is a kind of backward heat flow problem of nonlinear pseudoparabolic equation solved by combining the Riemann function method and the fixed point theory properly.

其次，根据不同模型的结构特点和附加条件，研究了几类伪抛物型方程的反问题：一是利用问题的形式解并结合附加条件，解决了一类伪抛物型方程常数系数的反问题；二是利用Riemann函数方法获得问题的形式解，利用附加条件将问题转化成求解第二类Volterra积分方程问题，解决了一类伪抛物型方程未知边界值的反问题和未知源项的反问题；三是将Riemann函数方法和不动点定理相结合，解决了一类非线性伪抛物型方程的后向热流问题。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。