Development and Application of a Power Law Constitutive Model for Eddy Current Dampers

Eddy current dampers (ECDs) have emerged as highly desirable solutions for vibration control due to theirexceptional damping performance and durability. However, the existing constitutive models present challenges tothe widespread implementation of ECD technology, and there is limited availability of finite element analysis (FEA)software capable of accurately modeling the behavior of ECDs. This study addresses these issues by developing anewconstitutivemodel that is both easily understandable and user-friendly for FEAsoftware. By utilizing numericalresults obtained from electromagnetic FEA, a novel power law constitutive model is proposed to capture thenonlinear behavior of ECDs. The effectiveness of the power law constitutive model is validated throughmechanicalproperty tests and numerical seismic analysis. Furthermore, a detailed description of the application process ofthe power law constitutive model in ANSYS FEA software is provided. To facilitate the preliminary design ofECDs, an analytical derivation of energy dissipation and parameter optimization for ECDs under harmonicmotionis performed. The results demonstrate that the power law constitutive model serves as a viable alternative forconducting dynamic analysis using FEA and optimizing parameters for ECDs.

The Protection of the Right to Dignity in the Connection and Interaction between the Constitution and Civil Law

In the report of 19;National Congress of the Communist Party of China,General Secretary Xi Jinping said that China seeks to"accelerate development of the crime prevention and control system,combat and punish in accordance with law all illegal and criminal activities such as pornography,gambling,drug abuse,gang violence,kidnapping,and fraud,and protect people’s personal rights,property rights,and right

“Fundamental Rights and Private Law” in China

The Qi Yuling case is a crucial juncture in the study of “fundamental rights and private law” in China, yet relevant research is underpinned on two clues. The first is that the increasing interest in the “constitutionalization of private law” worldwide provides knowledge resources and reference materials for scholars in China;the second is the understanding and exploration of the judicial application of the Constitution since the 1980s. Among them, such concepts as “the Constitution has direct legal effect” and “the Constitution needs to be implemented by the people” could have directly affected the Qi Yuling case. Focusing on such topics as the case of Qi Yuling, judicial enforcement of the Constitution, and the compilation of the Civil Code, scholars discussed the ways and scope for inclu ding fundamental rights in private law based on their experience abroad. They also looked into specific issues, covering how fundamental rights affect civil acts and the private law effects fundamental rights like personality rights, equali ty rights, freedom of speech, and protection of personal information. In the context of promoting the full implementation of the Constitution in the new era, “fundamental rights and private law” is still a field with great potential in both practice and theory.

网络暴力与道德宪治:基于系统论的分析

网络暴力是道德系统内在的自我强迫性增长所产生的结构性压迫。道德在互联网的支持下演化出自我再生产的功能系统,由此获得了一种不受外部约束的内部增长态势。道德系统不仅侵蚀了个人心理系统,而且将自己偏执的理性强加给其他社会子系统。对网络暴力的现有法律治理模式可以被归纳为个人主义模式、组织主义模式与国家主义模式,但它们都难以限制道德系统的内在扩张性。系统自控模式主张对道德系统的限制只能来自道德系统自身,通过在系统内部建立对立结构来对系统的病态扩张加以限制。道德宪治就是对系统自控模式的规范化与合理化。道德宪治是通过宪法这个结构性耦合机制,来为道德系统设定社会自治的框架,从而在不破坏道德系统功能自治的前提下,在其内部建立“反向结构”,进而达到以道德限制道德之功效。

论我国对法律的合宪性审查

长期以来,受观念、制度、程序等因素影响,对法律进行合宪性审查的制度推进较为缓慢。在党的二十大报告正式提出“健全保证宪法全面实施的制度体系”的背景下,落实对法律的合宪性审查,从学理上还是实践中对于完善我国的宪法监督制度都具有重大的意义。要依托法律草案合宪性说明制度,强化对法律草案的合宪性审查工作,还要根据我国宪法监督体制对法律实施阶段的合宪性审查设计科学、合理、可行的机制和程序,构建从事前到事后的全过程的合宪性审查环节,实现对法律是否合宪的有效监督。对法律的合宪性审查有利于保障宪法权威和法治统一,推进宪法全面实施,加快建设社会主义法治国家。

高铁开通对普铁站周边企业污染物排放的影响:事实与解析

本文以二氧化硫(SO2)作为污染物代表,采用双重差分的方法探究高速铁路(高铁)的开通对普速铁路(普铁)车站周边企业污染物排放的影响。研究表明:高铁开通能够推动普铁站周边企业减少污染物排放,经过一系列稳健性检验后,该结论依然成立。具体而言,高铁开通引发的“客货分线”效应改变了普铁站周边企业的生产过程,这些企业会通过减少工业锅炉使用数量、降低工业锅炉燃料消耗、提高污染处理能效、提升技术水平的手段逐步减少污染物排放。

“法治思想家”郭道晖教授的法理求索

郭道晖是我国著名的法学家和法治思想家,在法治、宪制、人权等领域卓有建树,做出开创性贡献,被尊称为“法治三老”之一。在法治论方面,他深入探究法的本质内涵,明确法与法律的区别,将法的时代精神归结为人权与自由,率先且形象地指出“法制”与“法治”区别,积极推动“法治”入宪。他较早地提出中国法治社会的理想前景与现实基础,率先提出市场经济是法治经济这一论断。他有着极强的立法实践问题意识,率先开展立法理论研究,较早地提出法律民主化的要求和原则。在宪制论方面,他论述了宪制的理念和精神,倡导社会主义宪制之路,提出立宪之后贵在行宪。他较早系统地研究权利和权力的关系,首倡权利推定理论,原创性地阐述了社会权力这一新范畴,倡导以社会权力制约国家权力。在人权论方面,他系统论证了人权的重要价值和基本内涵,重视政治人权的独特价值,详细论述了人权的国家保障义务及具体机制,是推动“人权入宪”的法学家之一。郭道晖精湛深刻的学术思想、忧国忧民的人文关怀、大胆创新的理论勇气、正道直行的学术风骨成为当代法学学人的精神标杆。

Data-driven modeling on anisotropic mechanical behavior of brain tissue with internal pressure

Brain tissue is one of the softest parts of the human body,composed of white matter and grey matter.The mechanical behavior of the brain tissue plays an essential role in regulating brain morphology and brain function.Besides,traumatic brain injury(TBI)and various brain diseases are also greatly influenced by the brain's mechanical properties.Whether white matter or grey matter,brain tissue contains multiscale structures composed of neurons,glial cells,fibers,blood vessels,etc.,each with different mechanical properties.As such,brain tissue exhibits complex mechanical behavior,usually with strong nonlinearity,heterogeneity,and directional dependence.Building a constitutive law for multiscale brain tissue using traditional function-based approaches can be very challenging.Instead,this paper proposes a data-driven approach to establish the desired mechanical model of brain tissue.We focus on blood vessels with internal pressure embedded in a white or grey matter matrix material to demonstrate our approach.The matrix is described by an isotropic or anisotropic nonlinear elastic model.A representative unit cell(RUC)with blood vessels is built,which is used to generate the stress-strain data under different internal blood pressure and various proportional displacement loading paths.The generated stress-strain data is then used to train a mechanical law using artificial neural networks to predict the macroscopic mechanical response of brain tissue under different internal pressures.Finally,the trained material model is implemented into finite element software to predict the mechanical behavior of a whole brain under intracranial pressure and distributed body forces.Compared with a direct numerical simulation that employs a reference material model,our proposed approach greatly reduces the computational cost and improves modeling efficiency.The predictions made by our trained model demonstrate sufficient accuracy.Specifically,we find that the level of internal blood pressure can greatly influence stress distribution and determine the possible related damage behaviors.

中国自主宪法教义学知识体系的建构

构建中国自主的宪法学知识体系,是新时代法学研究的基础议题。21世纪以来宪法学方法论的多元境况,成为中国宪法学走向成熟的基本标志。建构中国自主宪法教义学知识体系,应以规范主义立场的法解释学为方法论轴心,同时对经济学、政治学和社会学等社科研究方法持开放态度,遵循历史、规范和实践的三重理论逻辑展开,具有中国性、规范性和实践性的学术品格。中国自主宪法教义学知识体系的主体框架,主要包括宪法总论教义学、国家组织教义学、基本权利教义学和宪法保障教义学四个部分。

ITERATIVE ALGORITHM FOR AXIALLY ACCELERATING STRINGS WITH INTEGRAL CONSTITUTIVE LAW

A numerical method is proposed to simulate the transverse vibrations of a viscoelastic moving string constituted by an integral law. In the numerical computation, the Galerkin method based on the Hermite functions is applied to discretize the state variables, and the Runge- Kutta method is applied to solve the resulting differential-integral equation system. A linear iterative process is designed to compute the integral terms at each time step, which makes the numerical method more efficient and accurate. As examples, nonlinear parametric vibrations of an axially moving viscoelastic string are analyzed.

Finite element verification on constitutive law of AZ31 magnesium alloy at 400℃

A constitutive law is offered for an AZ31B-H24 Mg alloy within a strain rate range of 10-5-10-2 s-1 at a temperature of 400 ℃ The constitutive law, which is developed by curve fitting the tensile tests data, is expressed as a flow stress function of strain and strain rate. Furthermore, the constitutive law is embedded into a proper FE model to simulate the tensile experiments for the purpose of verifying reliability, where the incremental stress-strain relationships are calculated by an elastic-plastic theory in the finite element analysis （FEA）. The results show that the stress-strain characteristics and the final deformed shapes in the FEA agree well with the experiments. In addition, the predicting analysis of constant-velocity stretch conditions and the verification of a free bulge forming experiment show that the proposed FE model is practicable for mechanical analysis on superplastic forming problems. A selective numerical method is offered for advanced superplastic analysis on AZ31 Mg alloys.

A MODIFIED THERMAL VISCOPLASTIC CONSTITUTIVE LAW INVOLVING THE EFFECT OF TEMPERATURE RISE RATE

At high temperature rise rate, the mechanical properties of 10 # steel were determined experimentally in a very wide range of temperature and strain rates. A new constitutive relationship was put forward, which can fit with the experimental results and describe various phenomena observed in our experiments. Meanwhile, some interesting characteristics about the temperature rise rate, strain and strain rate hardening and thermal softening are also shown in this paper. Finally, the reliability of the constitutive law and the correctness of the constitutive parameters were verified by comparing the calculation results with the experimental data.

Predictive Elastoplastic Damage Constitutive Law: Establishment of Equivalence Relation between Intrinsic and Extrinsic Material Parameters

The purpose of the current work is the development and application of a new identification method of material parameters of elastoplastic damage constitutive model under large strains. A relationship relating the intrinsic and extrinsic parameters of a reference material is built and transformed in equivalence relation. Extrinsic parameters concern the shape of their experimental tensile force/elongation curve, however, intrinsic parameters deal with Swift hardening law coupled with an isotropic damage variable. The relationship is carried out from a statistical characterization of a material reference (standard-steel E24). It based on multiple linear regression of a data set obtained according to a full factor design of numerical simulations of mechanical tensile tests. All materials satisfying this equivalence relation belong to the same equivalence class. This is motivated by observing that gathered materials must behave somewhat like the reference material. The material parameters can be immediately identified by only one task by running the found relationship. The current method facilitates the identification procedure and offers a substantial savings in CPU time. However it just needs only one simulation for the identification of similar behavior instead of the few hundred required when using other methods.

立法解释制度功能的历史演进与新时代转型

通过综合分析立法解释制度功能的规范历程与实践变迁可以发现,其历史演进主要表现为两个方面。一是补充法律规定功能的确立、废止与长存。规范上的废止源自于学界关于法律解释有别于立法的理论批判,实践中的长存植根于哲学诠释学关于解释本质上是一种创造性行为的理性判断。二是明确界限功能与统一法律适用功能的角色转换。在规范层面,明确界限是立法解释制度的主要功能;在实践层面,明确界限转变为统一法律适用的主要方法。在我国宪法迈向合宪性审查的新时代背景下以及区分独立型立法解释与辅助型立法解释的理论前提下,立法解释制度可以发挥增强合宪(法)性审查说理性以及法律合宪性事后控制的新功能。为促进立法解释制度功能的全面与有效发挥,应建立健全立法解释制度与合宪性审查、法律修改等相关制度的衔接联动机制。

禁止单身女性辅助生殖条款的合宪性考量

随着我国女性人权意识的提高和妇女权益保障制度的完善,单身女性对冻卵的需求开始增加。单身女性冻卵问题不仅涉及公民的民事权利的保障,更涉及宪法基本权利的限制。妇女人权具有双重意涵,一方面指女性与男性一样平等地享有人人都具有的基本权利;另一方面则指女性基于在社会中的弱势地位而具有的特定群体的权利。限制单身女性辅助生殖条款落入了隐私权、特定群体权利的保护范围,存在违反法律保留、比例原则和平等保护的合宪性标准的嫌疑,有着适当性问题。通过合宪性限定解释可以解决单身女性冻卵的合法性难题,以宪法保护妇女人权的女性主义视角来完善《妇女权益保障法》,可以缓解女性的生育焦虑,减少侵害妇女人权的类似条款的产生。

海南自由贸易港法规制定权之性质定位与合宪性审视——从2023年《立法法》修改来看

2021年全国人大常委会审议通过了《海南自由贸易港法》,授予海南省人大及其常委会制定海南自由贸易港法规的权力。这是一个全新的制度设计,其正确运行的前提在于性质的明晰以及合宪的判断。2023年《立法法》修改,将海南自贸港法规制定权纳入其中,为其性质定位和合宪性判断提供了规范基础。结合《立法法》修改的相关精神和内容,通过层级、类型和内容三步限缩,明确海南自贸港法规制定权的地方性、授权性和变通性。将宪法作为法制统一的基础,从实质和形式两个方面,论证海南自贸港法规制定权的合宪性。

宪法和法律委员会在合宪性审查中的功能定位

宪法第五次修改将法律委员会修改为宪法和法律委员会,其职责已由全国人大常委会在相关文件中予以明确。其核心职能之一便是推进合宪性审查工作。宪法和法律委员会的设立有助于增强宪法解释的适用可能性、提高审查工作的协同性、优化合宪性审查机构设置及职能配置。然而,实践中发现,宪法和法律委员会在履职过程中存在程序规则缺失、责任规范缺失、制度建构失衡等现实困境。要完善其在合宪性审查中的功能,就必须完善程序规范与责任规范,统筹合宪性审查与备案审查的关系。

李龙教授在法学理论和法学教育方面的建树

依法治国 ,建设社会主义法治国家 ,必然要求法学理论为良性的法律运作提供理论支撑和行为指引。李龙教授在这方面成就斐然。本文从人权、法治。

论宪法信仰的价值及其树立

依法治国的核心与关键是依宪法治国,树立起对宪法坚定不移的信仰是对公众宪法情感的最高要求,是树立宪法意识的最高层次。公众普遍的宪法信仰可以成为建设社会主义法治国家的心理基础,从而为建设社会主义宪政奠定良好的精神底蕴。面对宪法信仰在中国法治建设中的缺失,切实实施宪法,树立宪法权威,是树立宪法信仰的关键之所在。

“公共利益”是什么?——社会功利主义的定义及其宪法上的局限性

本文从方法论的个体主义出发 ,论证社会功利主义为“公共利益”提供了最恰当的定义。按照这种定义 ,“公共利益”就是全部私人利益之和 ,而法律的基本目标就是个人利益总和的最大化。尽管如此 ,“公共利益”仍然很难准确计算 ,因而在很多情况下———例如土地征收和城市拆迁 ,政府计划是否符合“公共利益”是通过制度决定的。由于代议制民主和功利主义具有天然联系 ,议会一般被认为是“公共利益”的最适当决定者。最后 ,议会代表的多数人利益可能和少数人权利发生冲突。在这种情况下 ,议会权力及其所定义的“公共利益”必须通过宪政机制而受到限制 。