Floquet spectrum and universal dynamics of a periodically driven two-atom system

We investigate the Floquet spectrum and excitation properties of a two-ultracold-atom system with periodically driven interaction in a three-dimensional harmonic trap.The interaction between the atoms is changed by varying the s-wave scattering length in two ways,the cosine and the square-wave modulations.It is found that as the driving frequency increases,the Floquet spectrum exhibits two main features for both modulations,the accumulating and the spreading of the quasienergy levels,which further lead to different dynamical behaviors.The accumulation is associated with collective excitations and the persistent growth of the energy,while the spread indicates that the energy is bounded at all times.The initial scattering length,the driving frequency and amplitude can all significantly change the Floquet spectrum as well as the dynamics.However,the corresponding relation between them is valid universally.Finally,we propose a mechanism for selectively exciting the system to one specific state by using the avoided crossing of two quasienergy levels,which could guide preparation of a desired state in experiments.

Evaluating the Impact of the Universal Test and Treat Strategy on the Survival of Patients in the Northwest Region of Cameroon

Introduction: The main outcome of efficiently implemented universal test and treat (UTT) program is improved survival. UTT implementation has been ongoing in Cameroon since 2016 but evaluation data are scarce. This study aims to assess the survival of antiretroviral therapy (ART) patients initiated under UTT in Northwest region of Cameroon. Methods: This retrospective cohort study included HIV-positive patients initiated in 2016 at 27 purposefully selected sites and followed until 2021. Data was anonymously abstracted from ART registers and patients’ charts. Kaplan-Meier survival estimates and Cox model were used to compare the survival of patients initiated under UTT with those initiated otherwise, using stata version 14.0. Results: In total, 2490 HIV-positive patients (median age 42.7 years, 94.7% adults, and 69.0% female) participated in the study. Of 1389 patients with viral load (VL) test results, 55% were initiated on ART late. The VL suppression rate of patients initiated late and those initiated early were similar. During follow-up, 1020 (40.9%) participants censored. The survival curves of patients initiated early on ART and those initiated late were similar during the first 2.5 years of follow-up but significantly (p Conclusions: This study confirms the expected impact of UTT. Programs only need to close existing implementation gaps along the critical pathways (diagnosis and treatment) of UTT, focusing more on males.

Information Conductivity:Universal Performance Measure for Semantic Communications

As a novel paradigm,semantic communication provides an effective solution for breaking through the future development dilemma of classical communication systems.However,it remains an unsolved problem of how to measure the information transmission capability for a given semantic communication method and subsequently compare it with the classical communication method.In this paper,we first present a review of the semantic communication system,including its system model and the two typical coding and transmission methods for its implementations.To address the unsolved issue of the information transmission capability measure for semantic communication methods,we propose a new universal performance measure called Information Conductivity.We provide the definition and the physical significance to state its effectiveness in representing the information transmission capabilities of the semantic communication systems and present elaborations including its measure methods,degrees of freedom,and progressive analysis.Experimental results in image transmission scenarios validate its practical applicability.

Enhanced Temporal Correlation for Universal Lesion Detection

Universal lesion detection(ULD)methods for computed tomography(CT)images play a vital role in the modern clinical medicine and intelligent automation.It is well known that single 2D CT slices lack spatial-temporal characteristics and contextual information compared to 3D CT blocks.However,3D CT blocks necessitate significantly higher hardware resources during the learning phase.Therefore,efficiently exploiting temporal correlation and spatial-temporal features of 2D CT slices is crucial for ULD tasks.In this paper,we propose a ULD network with the enhanced temporal correlation for this purpose,named TCE-Net.The designed TCE module is applied to enrich the discriminate feature representation of multiple sequential CT slices.Besides,we employ multi-scale feature maps to facilitate the localization and detection of lesions in various sizes.Extensive experiments are conducted on the DeepLesion benchmark demonstrate that thismethod achieves 66.84%and 78.18%for FS@0.5 and FS@1.0,respectively,outperforming compared state-of-the-art methods.

Extensive numerical simulations on competitive growth between the Edwards–Wilkinson and Kardar–Parisi–Zhang universality classes

Extensive numerical simulations and scaling analysis are performed to investigate competitive growth between the linear and nonlinear stochastic dynamic growth systems, which belong to the Edwards–Wilkinson(EW) and Kardar–Parisi–Zhang(KPZ) universality classes, respectively. The linear growth systems include the EW equation and the model of random deposition with surface relaxation(RDSR), the nonlinear growth systems involve the KPZ equation and typical discrete models including ballistic deposition(BD), etching, and restricted solid on solid(RSOS). The scaling exponents are obtained in both the(1 + 1)-and(2 + 1)-dimensional competitive growth with the nonlinear growth probability p and the linear proportion 1-p. Our results show that, when p changes from 0 to 1, there exist non-trivial crossover effects from EW to KPZ universality classes based on different competitive growth rules. Furthermore, the growth rate and the porosity are also estimated within various linear and nonlinear growths of cooperation and competition.

Sci-tech Simultaneous Interpreter Education Based on Translation Universals Research

The rapid evolution of scientific and technological advancements and industrial changes has profoundly interconnected countries and regions in the digital information era,creating a globalized environment where effective communication is paramount.Consequently,the demand for proficient interpreting skills within the scientific and technology sectors has surged,making effective language communication increasingly crucial.This paper explores the potential impact of translation universals on enhancing sci-tech simultaneous interpreter education.By examining the selection of teaching materials,methods,and activities through the lens of translation universals,this study aims to improve the quality of teaching content,innovate instructional approaches,and ultimately,enhance the effectiveness of interpreter education.The findings of this research are expected to provide valuable insights for curriculum development and pedagogical strategies in interpreter education.

From the Subjectivity of Human Rights to the Universality of Human Rights——A Preliminary Interpretation of the Theory on the Subjectivity of Human Rights

Universality is one of the essential characteristics of human rights, but there is a substantive difference between idealism and realism in understanding the concept of universality of human rights. The concepts of radical universality and strong universality based on the concept of natural human rights are too idealistic and thus have a high risk of being alienated into a tool of international re-pression in practice. On the contrary, the theory on the subjectivity of human rights can effectively defuse this risk brought about by radical universality and strong universality. Advocating a transition from the universality of human rights to the subjectivity of human rights not only keeps in line with the actual construction process of international human rights, but can also effectively interpret the practical difficul-ties in the realization process of international human rights. Therefore, it can be used as another alternative theory on human rights beyond the theory of natural human rights.

Introducing a 2nd Universal Space-Time Constant Can Explain the Observed Age of the Universe and Dark Energy

The purpose of this paper is to introduce new theoretical concepts as opposed to accepting the existence of dark entities, such as dark energy. This research sought to introduce a 2nd universal space-time constant, besides having a finite speed constant (speed of light in vacuum c). A finite universal age constant b is introduced. Namely, this paper shows that the changes in the Earth’s anomalistic year duration over time support the hypothesis of the age of the universe correlating with a maximum number of orbital revolutions constant. Neglecting the gravitational influence of other cosmological entities in the proximity of the Earth, the constant maximum number of revolutions is herewith determined solely by the Earth’s orbital revolutions around the Sun. The value of the universal age constant b is calculated to be around 13.8 billion orbital revolutions, derived out of an equation related to the changes in the Earth’s anomalistic year duration over time and the so-called Hubble tension. The above-mentioned calculated value b correlates well with the best fit to measured data of the cosmic microwave background radiation (CMBR) by the Planck spacecraft, the age of the observed universe is measured to be approximately 13.787 ± 0.020 billion years (2018 final data release). Developing a theory with this 2nd universal space-time constant b, being covariant with respect to the Lorentz transformations when time spans are large, gives results such as: A confirmation of the measured CMBR value of 13.787 ± 0.020 billion years. Correlating well with the observed expansion rate of the universe (dark energy). The universe’s expansion accelerating over the last four to five billion years.

Development and Optimization of Universal Bone Conduction Hearing Spectacles

Background: Non-implantable bone anchored hearing devices (BCHDs) are utilized for patients with conductive or mixed hearing loss who are unsuitable for conventional hearing aids or have unresolved middle ear issues. These devices can be surgically implanted or attached using adhesive plates, dental sticks, elastic headbands, or bone conduction spectacles. Optimal fitting of bone conduction spectacles requires appropriate frame selection and contact pressure in the temporal and mastoid areas. The ANSI S3.6 and DIN EN ISO 389-3 standards recommend a contact area of approximately 1.75 cm2 and a maximum force of 5.4 N for effective sound transmission and comfort. Methods: This study aimed to evaluate the technical fit and mechanical stability of universal bone conduction hearing spectacles compared to established systems. A Sen-Pressure 02 thin-film sensor connected to an Arduino Uno R3 board measured contact force in the temporal and mastoid areas. Several BCHDs were tested, including the Bruckhoff la belle BC D50/70, Radioear B71 headset, Radioear B71 elastic headband, Cochlear Baha SoundArc M, and Cochlear Baha elastic headband, on a PVC artificial head, with data analyzed using ANOVA and LSD post hoc tests. Results: The la belle BC D50/70 spectacles showed comparable contact force to established BCHDs, ensuring adequate sound transmission and comfort. Significant differences were observed between the systems, with the Radioear B71 headset exhibiting the highest forces. The la belle BC D50/70 had similar forces to the Radioear B71 elastic headband. Conclusion: The la belle BC D50/70 universal bone conduction hearing spectacles are a technically equivalent alternative to established BCHDs, maintaining pressure below 5.4 N. Future research should explore the impact of different contact forces on performance and comfort, and the integration of force control in modified spectacles. This study indicates that the la belle BC D50/70 is a viable alternative that meets audiological practice requirements.

An In-depth Interpretation of the Universal Declaration of Human Rights With the Common Values of Humanity As the Research Paradigm

Interpreting the Universal Declaration of Human Rights from political,juridical and philosophical perspectives is es-sential for promoting the guiding principles of the Declaration,build-ing consensus on human rights,and advancing human rights practice in the new historical context.To conduct an academic,systematic in-terpretation of the Declaration that conforms to the trends of the times and answers the fundamental questions of the world,it is necessary to find a new research paradigm.The common values of humanity,namely peace,development,equity,justice,democracy and freedom,put forward by Xi Jinping,general secretary of the Communist Party of China(CPC)Central Committee,provide the most explanatory and penetrating scientific paradigm for reaching the issue.This paper an-alyzes and reflects on the views,value foundation and principled(con-tractual)consensus of human rights in the Declaration,and narrates and foresees the far-reaching significance of the three global initia-tives(namely,the Global Development Initiative,the Global Security Initiative,and the Global Civilization Initiative)with the common val-ues of humanity as the soul in advancing the modernization of global human rights governance and building a new form of human rights civilization.

Revisiting the Spirit of the UDHR and Discussing Human Rights Development——Summary of Views from the Seminar Commemorating the 75th Anniversary of the Universal Declaration of Human Rights

On December 4,2023,the China Society for Human Rights Studies hosted a seminar in Beijing commemorating the 75^(th) Anniversary of the Universal Declaration of Human Rights.Participants discussed topics such as the significance of the Universal Declaration of Human Rights,China’s theories and practices in respecting and safeguarding human rights,the three global initiatives and global human rights governance,human rights protection in the digital age,and telling Chinese stories of human rights in the new era.The discussions led to a broad consensus and achieved positive results.

氯化镍与有机蒙脱土在环氧基膨胀型钢结构防火涂料中的协效作用

以有机蒙脱土(OMMT)和氯化镍(NiCl_(2))作为复配协效剂制备环氧基膨胀型钢结构防火涂料,通过锥形量热仪、热重分析仪(TG)、扫描电镜(SEM)和傅立叶变换红外光谱(FT-IR)系统研究了复配协效剂在防火涂料中的防火和抑烟作用。结果表明:单独添加OMMT和NiCl_(2)均能有效增强环氧基膨胀型钢结构防火涂料的隔热性能并降低燃烧过程中的生烟量和热释放,将二者复配使用表现出更好的协效作用。当m(OMMT)∶m(NiCl_(2))=1∶1时,膨胀型钢结构防火涂料的峰值热释放速率、峰值生烟速率以及300℃背温时间分别为291.3 kW/m^(2)、0.039 m^(2)/s和1465 s。TG结果表明,OMMT和NiCl_(2)复配使用可以降低涂料的峰值分解温度和质量损失速率,使涂层在700℃时的残炭率高达24.8%。SEM和FT-IR结果表明,OMMT和NiCl_(2)复配使用有利于形成更多含磷交联结构进而提高膨胀炭层的致密性和连续性,达到较好的防火和抑烟作用。

改性埃洛石纳米管在聚脲基防火涂料中的应用研究

为了提高聚脲基防火涂料的防火性能,探究埃洛石纳米管对聚脲基涂料防火性能的影响,通过表面改性的方法,用甲基三甲氧基硅烷改性埃洛石纳米管,并将改性埃洛石纳米管引入到聚脲膨胀型防火涂料中,采用锥形量热仪、红外光谱分析仪、导热系数仪、场发射扫描电镜、透射扫描电镜、防火性能测试装置等对其进行表征分析。研究发现:添加质量分数为5%的改性埃洛石纳米管的涂料样品的热释放峰值为95.89 kW/m^(2),相较未添加的样品降低了38.48%;总的热释放量为7.20 MJ/m^(2),相较未添加的样品降低了76.50%;总的烟释放值为4.32 m^(2),相较未添加的样品降低了40.98%;常温下导热系数为0.067 W/(m·K),相较未添加的样品降低了17.30%;燃烧后样品残留物表面更加致密,强度更高,对烟热的释放有更好的抑制作用,表现出了优异的防火性能。实验结果表明,改性埃洛石纳米管在降低复合材料导热系数和基体树脂催化成炭方面起到了双重作用,对聚脲基防火涂料防火性能的提高起到了重要作用。

涂料干燥成膜过程及开裂机理综述

涂料干燥是重要的工业过程,但其过程受温度、湿厚、基材与涂层性质等因素的影响且薄膜开裂机理复杂,涉及多学科的交叉融合,因此有必要研究涂料干燥成膜过程、薄膜开裂机理及抑制开裂的措施。总结分析了自20世纪50年代以来关于涂料干燥成膜及开裂的相关文献。阐述了涂料在垂直、横向、混合干燥模式下的干燥成膜过程;探究了涂层的开裂机理,总结了临界无裂纹内应力、临界无裂纹膜厚的计算方法;分析了影响薄膜开裂的因素,包括干燥环境的温度、涂层湿厚、基材性质、溶液性质;探索了单条裂纹的形态特性、裂纹的分布规律;探明了裂纹的种类,从4个方面对抑制开裂的方法进行了分析。

2024年全球涂料行业运行展望及对中国涂料行业的影响分析

综述了全球经济概况、全球通胀和贸易对于涂料行业的影响,国际涂料行业整体动态。阐述了涂料行业营收增长因素、新兴国家GDP增长推动涂料人均消费增长概况,着重分析了建筑装饰涂料、原厂涂料、特种与防护涂料等重点涂料细分领域发展趋势。并从全球经济发展重要驱动方向对全球涂料工业未来发展进行了展望。

高耐水聚合物水泥防水涂料及其应用性能研究

从JS防水涂料的耐水机理出发,针对性地设计了由聚合物中活性官能团(羧基)与交联剂形成的后交联结构,减弱了水分子对聚合物分子间的增塑作用及对聚合物分子与无机填料界面力的破坏作用,研制了一种具有优异耐水性能的JS防水涂料。该涂料在长期浸水后,仍保持较好的物理力学性能,吸水率<9%、拉伸强度>1.6 MPa,且浸水1年后表观无变化。

船舶涂料研究进展

对船舶涂料的分类进行梳理,为今后进一步探索船舶涂料的新材料、新工艺和新应用提供指导。

水性无机耐高温防腐涂料的研制

以硅烷KH560、甲基三甲氧基硅烷偶联剂、气相二氧化硅和氢氧化钾为主要原料合成水性无机耐高温树脂,为提高涂料的耐热性,选择铜铬黑、磷酸锌、碳酸镁作为主要颜填料,并选用抗开裂粉料、消泡剂、分散剂等提高涂层外观及涂料的施工性能等。结果表明,该涂料有机挥发物低于100mg/L,涂层能在200℃固化成膜,700℃煅烧2h仍具有良好的防腐性能,且附着力好、耐盐雾性能良好。

石墨烯电热涂料的制备与性能影响因素分析

碳系电热涂料以高电热转化率、安全稳定、适用性强等特点成为电热功能性涂料主流的研究方向。其中以石墨烯为导电填料的石墨烯电热涂料深受研究人员青睐,但是影响石墨烯电热涂料性能的因素众多,为此国内外科技工作者进行了大量的研究。综述了影响石墨烯电热涂料性能的因素,着重分析了制备工艺、界面效应、分散度、粘结剂等对石墨烯电热涂料性能的影响,最后指出了石墨烯电热涂料目前存在的问题并展望了其未来发展趋势。

氮化硼纳米片表面修饰及其在导热涂料中的研究进展

目的研究氮化硼纳米片表面修饰对导热涂料性能的影响,以改善微电子产品的散热功能。方法从氮化硼纳米片的制备出发,介绍了共价修饰和非共价修饰氮化硼纳米片的表面处理技术,综述了氮化硼纳米片分别与环氧树脂、聚氨酯树脂、有机硅树脂等高分子材料制备复合导热涂料的研究进展及氮化硼纳米片用于导热涂料存在的现行问题。结果自上而下策略是氮化硼纳米片制备工艺中应用最广的策略方法,通过共价和非共价修饰氮化硼纳米片可以有效改善氮化硼纳米片与高分子材料的相容性,进而提升氮化硼纳米片与高分子材料制备的复合涂料的导热性能。结论氮化硼纳米片表面修饰在导热涂料领域具有广阔的应用前景,将为微电子产品的散热问题提供更有效的解决方案。