Robust Dichotomy Solution-Based Model Predictive Control for the Grid-Connected Inverters with Disturbance Observer

This paper proposes a robust dichotomy-based model predictive control(DS-MPC)with a fixed switching frequency for the grid-connected inverter(GCI).The proposed fast dichotomy algorithm can select and deduce the optimal voltage vector dynamically through the space vector plane.Therefore,the proposed DS-MPC strategy could ensure dynamic performance and steady-state performance as well.Also,the current control robustness can be improved through DS-MPC with disturbance observer(DO)based on the extended Kalman filter(EKF).The novelty of this control is that the current control with fast dynamic response can be realized in the weak grid,even if the grid voltages are greatly distorted.Simulation and hardware experiments on the weak grid validate the effectiveness of the proposed DS-MPC with the EKF observer approach.

Exponential Dichotomy and Eberlein-Weak Almost Periodic Solutions

We give sufficient conditions ensuring the existence and uniqueness of an Eberlein-weakly almost periodic solution to the following linear equation dx/dt(t) = A(t)x(t) + f(t) in a Banach space X, where (A(t)) t ∈□ is a family of infinitesimal generators such that for all t ∈□, A(t + T) = A(t) for some T > 0, for which the homogeneuous linear equation dx/dt(t) = A(t)x(t) is well posed, stable and has an exponential dichotomy, and f:□ →X is Eberlein-weakly amost periodic.

EXPONENTIAL DICHOTOMIES,HOMOCLINIC ORBITS AND METHODS OF MELNIKOV

In this paper we construct, by using the theory of exponential dichotomies, a Melnikov-type function by which we can detect the existence of homoclinic orbits for the perturbed systems x = g(x) + epsilon h(t, x, epsilon). Our result of this paper may be complementary to that of K.J.Palmer([3]).

Quadratic Lyapunov Function and Exponential Dichotomy on Time Scales

In this paper, we study the relationship between exponential dichotomy and quadratic Lyapunov function for the linear equation x△=A（t）x on time scales. Moreover, for the nonlinear perturbed equation x△= A（t）x ＋ f（t, x） we give the instability of the zero solution when f is sufficiently small.

Pseudo Almost Automorphic Solutions for Non-autonomous Stochastic Differential Equations with Exponential Dichotomy

In this paper, we consider the existence and uniqueness of the solutions which are pseudo almost automorphic in distribution for a class of non-autonomous stochastic differential equations in a Hilbert space. In conclusion, we use the Banach contraction mapping principle and exponential dichotomy property to obtain our main results.

Exponential Dichotomies and Fredholm Operators of Dynamic Equations on Time Scales

For time-varying non-regressive linear dynamic equations on a time scale with bounded graininess, we introduce the concept of the associative operator with linear systems on time scales. The purpose of this research is the characterizations of the exponential dichotomy obtained in terms of Fredholm property of that associative operator. Particularly, we use Perron’s method, which was generalized on time scales by J. Zhang, M. Fan, H. Zhu in?[1], to show that if the associative operator is semi-Fredholm then the corresponding linear nonautonomous equation has an exponential dichotomy on both?T?+?and?T-.??Moreover, we also give the converse result that the linear systems have?an exponential dichotomy on both?T?+?andT-??then the associative operator is Fredholm on?T.

Plotting the Sequential Rock Remote Sensing Information by Optimization Dichotomy Method

The sequential rock remote sensing information is a group of rocks that are correlative in space or in space and time. For the sake of plottiug them, someone had brought forward the optimization segn.entotion metkod. We have ased this method to plot the sequential rock remote sensing information at tbe remote sensing hyperspetral test field of Daqing mountain, Inner Mongolia Autonomous Region, China, and found some disadvantages of this method. Therefore, we put forward the optimization dichotomy to plot them, and get better results. Finally we make a conclusion.

Exponential Dichotomies and Homoclinic Orbits from Heteroclinic Cycles

In this paper, we investigate the homoclinic bifurcations from a heteroclinic cycle by using exponential dichotomies. We give a Melnikov—type condition assuring the existence of homoclinic orbits form heteroclinic cycle. We improve some important results.

Nature and Culture Dualism： Genesis of an Obsolete Dichotomy

This paper will discuss the relation between the concepts of nature and culture and their intricate interdependency, focusing on modernity. Moreover, it will analyze the dichotomy that has historically emerged and its implications. Human beings have had different conceptions about what is natural and what is non-natural throughout their history. Before Modernity we did not conceive nature as being a different ontological reality, we did not perceive it as being separated from us. After modernity everything changed, and we began to see nature as a mere object. Nature became, then, a representation, like a painting on a wall. Our contemporary world vision, Weltanschauung, was formed mainly during the 16th and 17th centuries. There was, at that time, a considerable change in the way we perceived and described the world. This new mentality and this new form of representing the cosmos provided the basis for our new way of thinking. They were the substrate upon which our modern paradigm was erected. The world＇s conversion in an image only became a reality thanks to technology. But this change happened only because of the paradigm shift originated in the 17th century. Technique always has been a way to articulate how （and what） we think. With the Greek, technique （technd） was, at first, an extension of the physis. Thus, the technique was a way of being instead of a way of thinking. After the paradigm shift in the 17th century （a metaphysical change, in the very way we connected to the world）, the human being left his former place. Perhaps would be even better if we talked about nature and culture as being as a hybrid. What, at the source, was natural, through the flows of production and consumption, undergoes transformations and becomes something that is not natural anymore but, at the same time, not completely artificial either. Our world, once divided between the social and the natural, becomes a space where a constant process, a continuous flow, is constantly happening. From that dichotomy between something good and something bad arises a dialectic, in which we no longer can see any division whatsoever.

论人工智能生成内容的可版权性:以用户的独创性表达为视角

AIGC既包含来自机器的选择,也包含来自人类用户的选择。当后者满足独创性表达要求时,AIGC便足以被认定为作品。在判断用户的独创性表达时,裁判者应当关心人贡献了什么,而不是工具贡献了什么;应当关心人贡献了什么,而不是人没有贡献什么;应当关心人贡献的实质,而非纠结于其形式。在以上原则的指导下,既有的作品构成要件规则足以支持相当一部分AIGC获得作品资格。AIGC的所谓“随机性”,只是发生在用户指定范围内的“随机”,并不妨碍用户控制达到著作权法的要求。作为文本的提示词,具有转化为包括视觉表达在内的其他类型表达的可能性。若以摄影为参照系,AI与传统工具的比较不仅不能导致对作品资格的否定,反而能够凸显“工具贡献大并不意味着人的贡献不足”。著作权法的“宽进宽出”结构提示我们,将用户做出独创性表达的AIGC纳入著作权法图式是在认知层面最为经济的利益平衡分析框架。考虑到独立创作例外和版权救济手段的灵活性,承认AIGC获得作品资格的可能性并不会过度妨碍公众自由。

对“Idea/Expression Dichotomy”的认识

国内对idea/expression dichotomy译法虽还有些争议,但郑成思先生已解决了这一问题。从idea/expression dichotomy的起源和发展来看,随着版权保护范围的扩大,区分思想和表达的方法也不断精细和复杂,这些都是随着个案情况的不同而发展的,两分法从一开始就为解决版权侵权这一实际问题而产生的。两分法区分受保护的表达和不受保护的思想是在个案中认定的,没有一成不变的公式,法院应当综合考虑作者、作品利用人和社会公共利益的平衡,准确适用两分法来判定侵权与否。

The Development Path of China-South Korea-Japan International Relations From the New Hua-yi System

The Hua-yi system represents an enduring international order in East Asia,dating back nearly two millennia,structured and developed within the framework of Chinese culture.While the contemporary international system predominantly follows the Westphalian model,mainstream international relations theories are primarily grounded in it.However,Western theories have proven inadequate in explaining the longstanding Hua-yi system in East Asia comprehensively.Adopting a positivist stance,this paper undertakes an examination of the theoretical underpinnings of the Hua-yi system through an analysis of its connotations and historical development.It elucidates the system through the lenses of hegemony stability theory and constructivist cultural perspectives.Present-day East Asian nations are urged to engage dialectically with the Hua-yi system and uphold its practices of“cultural soft border”.Amidst the global trend of multi-polarization,East Asian nations should realign with East Asian perspectives and interests,endeavoring to establish a neo-Hua-yi system with responsibility at its core.

Zeno’s Paradoxes and Lie Tzu’s Dichotomic Wisdom Explained with Alpha Beta (αβ) Asymptotic Nonlinear Math (Including One Example on Second Order Nonlinear Phenomena)

Zeno’s paradoxes are a set of philosophical problems that were first introduced by the ancient Greek philosopher Zeno of Elea. Here is the first attempt to use asymptotic approach and nonlinear concepts to address the paradoxes. Among the paradoxes, two of the most famous ones are Zeno’s Room Walk and Zeno’s Achilles. Lie Tsu’s pole halving dichotomy is also discussed in relation to these paradoxes. These paradoxes are first-order nonlinear phenomena, and we expressed them with the concepts of linear and nonlinear variables. In the new nonlinear concepts, variables are classified as either linear or nonlinear. Changes in linear variables are simple changes, while changes in nonlinear variables are nonlinear changes relative to their asymptotes. Continuous asymptotic curves are used to describe and derive the equations for expressing the relationship between two variables. For example, in Zeno’s Room Walk, the equations and curves for a person to walk from the initial wall towards the other wall are different from the equations and curves for a person to walk from the other wall towards the initial wall. One walk has a convex asymptotic curve with a nonlinear equation having two asymptotes, while the other walk has a concave asymptotic curve with a nonlinear equation having a finite starting number and a bottom asymptote. Interestingly, they have the same straight-line expression in a proportionality graph. The Appendix of this discussion includes an example of a second-order nonlinear phenomenon. .

The Property of Dichotomy for a Class of Interconnected Pendulum-like Systems

The property of dichotomy of interconnected second-order pendulum-like systems with multiple equilibria is investigated. This interconnection can be viewed as harmonic control of independent sub-systems. Linear interconnections and a class of input and output interconnections are considered in this paper. The effects of input and output interconnections are shown through a permutation matrix. Frequency domain and linear matrix inequality (LMI) conditions of dichotomy of interconnected pendulum-like systems are derived. It is shown that global properties of two coupled systems can be changed significantly through interconnections. Examples are given to illustrate the results.

Wildean Ambivalent Dichotomy of Women--Taking An Ideal Husband as An Example

Oscar Wilde is mainly famous for being the representative figure of Aesthetic Movement and the steadfast advocate of"art for art's sake". Although being influenced by the traditional dichotomy of women, Wilde does try to add some personal elements during this process. In one of his social comedies, An Ideal Husband, this wildean characteristic is more obvious. This essay attempts to reveal those hidden images which are employed by Wilde to represent his female characters and tries to show the Wilde's improvement of the traditional dichotomy.

地理学的时代特征、二元论与可持续发展

地理学作为一门学科总体上与科学体系的发展亦步亦趋。20世纪自然地理学与人文地理学的分裂曾严重消解了地理学的整体性和统一性,同时专业分化与研究主题的纵深发展造成了学科的空心化。面对21世纪复杂性科学、地球系统科学和新的科学综合体的到来,在全球化和可持续发展的大背景下,我们应该在大学课堂上让自然与人文再度融合,通过学术语言的规范、学科理论的构建、研究范式的转换,将二元论的影响消融于无形,能以一种整体化、系统性的观念来应对人类的未来和地球的可持续性发展这一艰巨而复杂的任务。

新工科背景下Python程序设计课程教学模式设计与实践

Python程序设计课程是计算机专业的一门核心专业课,传统的单一的教学模式无法满足新工科建设对创新创业人才培养的要求。为了提升教学效果,将线上线下、对分课堂、分层教学和问题驱动等教学方法相结合,提出了新的教学模式和方法。文章详细阐述了该模式的教学设计、评价设计思想及该模式在教学实践中的具体运用情况。教学实践表明学生发现问题、分析问题和解决问题的创新创业意识和能力有了较大的提升。

优先权之反思与重述

优先权的概念范畴有狭义和广义之分。源自法国民法的狭义优先权长期游离于我国债物二分体系之中,已造成权利性质难辨、公示机制阙如和其他衍生的学理弊端。广义优先权谱系的创设存在语境虚假、效果无益、集合异类等显著缺陷。在狭义优先权中,一般优先权实为债权,特别优先权实为法定抵押权。此种法定抵押权与受其担保的主债权相区分,具有债法和物法的双重面相。其他所谓的“优先权”子项主要包括竞争中享有优待地位的资格和对因顺位判定原则或规则所生结果的描述。

基于混合像元分解的分蘖期水稻基本苗数量估测方法研究

基本苗数量是反映水稻健康水平的重要依据,在分蘖期精准估测水稻基本苗数量可以指导后期的施肥量,从而调控水稻的最佳分蘖数。同时,对水稻长势监测和产量预测具有非常重要的意义。针对传统田间人工统计基本苗数量耗时长、成本高等问题,以江苏大学附属农场镇江润果农场分蘖期水稻为研究对象,利用大疆无人机(M600 Pro型)搭载多光谱相机(Rededge-MX型)获取水稻分蘖期多光谱数据,对原始图像进行图像拼接、辐射校正、几何校正等预处理操作,根据像元纯度系数提取土壤端元和植被端元,建立波谱库,然后按照完全约束最小二乘法的方法执行混合像元分解,构建植被覆盖度和水稻基本苗数量的回归模型。该研究方法获得的模型决定系数R^(2)为0.891,均方根误差RMSE为4.6株/m^(2)。而传统的像元二分法模型(基于NDVI、VDVI和GNDVI植被指数计算植被覆盖度),其决定系数R2为0.834、0.744、0.642,其RMSE为5.7、7.1、8.4株/m^(2)。试验结果表明,基于完全约束最小二乘法的混合像元分解模型评价指标均优于像元二分法模型。本文基于混合像元分解方法有效提高了水稻基本苗统计精度,并且生成了水稻基本苗数量反演图,可以直观统计基本苗数量,为分蘖期水稻补苗、间苗提供指导。