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A Fast Insertion Tabu Search with Conflict-Avoidance heuristic for the Multisatellite Multimode Crosslink Scheduling Problem

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Tsinghua Science and Technology 2024年第3期29卷 843-862页

作者： Weiyi Yang lei he Xiaolu Liu Weican Meng Yingwu Chen College of Systems Engineering National University of Defense TechnologyChangsha 410000China Beijing Institude of Tranking and Telecommunication Technology Beijing 100000China

An agile earth-observing satellite equipped with multimode cameras capable of transmitting observation data to other satellites is developed to rapidly respond to requests with multiple observation *** gives rise to the Multisatellite Multimode Crosslink Scheduling(MMCS)problem,which involves allocating observation requests to agile satellites,selecting appropriate timing and observation modes for the requests,and transmitting the data to the ground station via the satellite communication ***,a mixed integer programming model is introduced to include all complex time and operation *** solve the MMCS problem,a two-stage heuristic method,called Fast insertion Tabu Search with Conflict-avoidance(FTS-C)heuristic,is *** the first stage,a conflict-avoidance insertion algorithm is designed to generate a high-quality initial solution by considering the requests transmission and ***,the tabu search-based second stage optimizes the initial ***,an extensive empirical study based on a real-world situation demonstrates that FTS-C can generate a solution with higher quality in less time than other state-of-the-art algorithms and the CPLEX solver.

关键词： earth observation satellites scheduling tabu search heuristic data transmission and download mixedinteger programming model

The size effect and analogous boundary states in a circular non-hermitian chain

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Communications in Theoretical Physics 2024年第2期76卷 157-165页

作者： Xin-Yu Ma Yi-Han Guan Qiao-Nan Li Ai-lei he Lu Qi School of Physical Science and Technology Yangzhou UniversityYangzhou 225002China

We investigate the size effect and boundary states based on a circular non-hermitian chain under the nonreciprocal intra-cell coupling and inter-cell coupling *** find that the circular non-hermitian chain exhibits an even–odd effect on the unit cell corresponding to a large chain,which is different from the open non-hermitian chain only exhibiting the same effect for a small ***,we find that the originally localized bulk states become totally extended via designing the boundary coupling strength *** extended bulk states reveal the fact of the disappearance of the non-hermitian skin *** particular,we show that the circular non-hermitian chain also possesses the analogous edge states under some parameter regimes,which is pretty counterintuitive since the circular chain usually cannot define a *** investigations supply the different non-hermitian phenomena in a circular non-hermitian chain.

关键词： boundary states non-hermitian chain topological state

Cloud-Model-Based Feature Engineering to Analyze the Energy-Water Nexus of a Full-Scale Wastewater Treatment Plant

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Engineering 2024年第5期36卷 63-75页

作者： Shan-Shan Yang Xin-lei Yu Chen-Hao Cui Jie Ding lei he Wei Dai Han-Jun Sun Shun-Wen Bai Yu Tao Ji-Wei Pang Nan-Qi Ren State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150000China Key Laboratory of Environmental Biotechnology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China School of Civil and Environmental Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China China Energy Conservation and Environmental Protection Group Beijing 100089China

Wastewater treatment plants(WWTPs)are important and energy-intensive municipal *** energy consumption and relatively low operating performance are major challenges from the perspective of carbon ***,water-energy nexus analysis and models for WWTPs have rarely been reported to *** this study,a cloud-model-based energy consumption analysis(CMECA)of a WWTP was conducted to explore the relationship between influent and energy consumption by clustering its influent’s *** principal component analysis(PCA)and K-means clustering were applied to classify the influent condition using water quality and volume *** energy consumption of the WWTP is divided into five standard evaluation levels,and its cloud digital characteristics(CDCs)were extracted according to bilateral constraints and golden ratio *** results showed that the energy consumption distribution gradually dispersed and deviated from the Gaussian distribution with decreased water concentration and *** days with high energy efficiency were extracted via the clustering method from the influent category of excessive energy consumption,represented by a compact-type energy consumption distribution curve to identify the influent conditions that affect the steady distribution of energy *** local WWTP has high energy consumption with 0.3613 kW·h·m^(-3)despite low influent concentration and volumes,across four consumption levels from low(I)to relatively high(IV),showing an unsatisfactory operation and management *** average oxygenation capacity,internal reflux ratio,and external reflux ratio during high energy efficiency days recognized by further clustering were obtained(0.2924-0.3703 kg O_(2)·m^(-3),1.9576-2.4787,and 0.6603-0.8361,respectively),which could be used as a guide for the days with low energy ***,this study offers a water-energy nexus analysis method to identify influent conditions with operational manageme

关键词： Wastewater treatment plants Cloud-model theory Data mining Principal component analysis K-means clustering Cloud-model-based energy consumption analysis

Self-powered stimuli responsive material for dual stimulation of heat and guest molecules

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Chinese Chemical Letters 2024年第2期35卷 590-593页

作者： Jintao Men Ke Xu Taiting Sha lei he Yan Xu Jie Mu Tijian Yin Qiong Ye Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics and School of Chemistry and Chemical Engineering Southeast UniversityNanjing 211189China

Stimuli-responsive smart materials exhibit reverse chemical/physical changes in response to external stimuli and research on stimuli-responsive smart materials with self-powered properties is still uncultivated ***,we report perovskite crystalline self-powered multiple stimuli-responsive materials triggered by chemical and thermal stimuli.[HMEP]PbI_(3)·(H_(2)O)(1;HMEP is a hydroxytris(1-methylethyl)phosphorus cation)crystallizes in a chiral space group P 21 at 293 K and has the piezoelectric reaction(d_(33)=10 pC/N and output voltage=1 V)of self-powered modes,this value is larger than the value of 3 pC/N for the classical piezoelectric material *** materials can generate energy due to mechanical deformation,and using thermal heating to lose water,[HMEP]PbI_(3)(2)can be obtained.2 crystallizes in the non-centrosymmetric space group,undergoes two reversible phase transitions at 243/255 K and 315/348 K,and shows second harmonic generation ***,2 can return to the hydrated form 1 after absorbing *** work will lay the foundation for self-powered stimuli-responsive compounds and contribute to the construction of novel organic-inorganic hybrid materials with second harmonic generation switching.

关键词： Self-powered Dual stimulation reactive Phase transition SHG switch Organic-inorganic hybrid perovskite

Pulsations of Three Rapidly Oscillating Ap Stars TIC 96315731,TIC72392575,and TIC 318007796

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Research in Astronomy and Astrophysics 2024年第8期24卷 157-168页

作者： Hai-Jian Zhong Dong-Xiang Shen Chun-Hua Zhu he-lei Liu Su-Fen Guo Guo-Liang Lü School of Physical Science and Technology Xinjiang UniversityUrumqi 830046China Xinjiang Astronomical Observatory National Astronomical ObservatoriesChinese Academy of SciencesUrumqi 830000China

We analyze the frequencies of three known roAp stars,TIC 96315731,TIC 72392575,and TIC 318007796,using the light curves from the Transiting Exoplanet Survey *** TIC 96315731,the rotational and pulsational frequencies are 0.1498360 day^(-1)and 165.2609 day^(-1),*** the case of TIC 72392575,the rotational frequency is 0.25551 day^(-1).We detect a quintuplet of pulsation frequencies with a center frequency of135.9233 day^(-1),along with two signals within the second pair of rotational sidelobes of the quintuplet separated by the rotation *** two signals may correspond to the frequencies of a dipole *** TIC318007796,the rotational and pulsational frequencies are 0.2475021 day^(-1),192.73995 day^(-1),and196.33065 day^(-1),*** on the oblique pulsator model,we calculate the rotation inclination(i)and magnetic obliquity angle(b)for the stars,which provide the geometry of the pulsation *** the phases of the frequency quintuplets,the pulsation amplitude and phase modulation curves,and the results of spherical harmonic decomposition,we conclude that the pulsation modes of frequency quintuplets in TIC96315731,TIC 72392575,and TIC 318007796 correspond to distorted dipole mode,distorted quadrupole mode,and distorted dipole mode,respectively.

关键词： asteroseismology-techniques photometric-stars oscillations(including pulsations)-stars chemically peculiar

A New Flavonoid Glycoside from Polygonum capitatum

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Medicinal Plant 2024年第1期15卷 28-31页

作者： lei he Yan LIN Minghui he Bo TU School of Pharmaceutical Sciences Guizhou Medical UniversityGuiyang 550025China Engineering Research Center of Chronic Disease Prevention and Treatment of Authentic Medicinal Materials for Institutions of Higher Education in Guizhou Province Guiyang 550025China

[Objectives]To discover novel compounds with significant anti-inflammatory activity in the alcohol extract of Polygonum capitatum.[Methods]Firstly,a new flavonoid glycoside,capitaone B(1),was isolated from the ethyl acetate extract from ***,and then 27 compounds were screened using NO anti-inflammatory activity model.[Results]Four compounds,such as kaempferol(12),1,2,6-trigalloyl-β-d-glucose(15),catechin(16)andβ-sitosterol(26),could significantly inhibit LPS-induced NO production in macrophages,with IC 50 values of 15.31,8.43,6.92 and 5.72μM,respectively.[Conclusions]The chemical composition and anti-inflammatory activity of *** were preliminarily studied,and the results provide a theoretical basis for further research on the action mechanism of subsequent anti-inflammatory active compounds of ***.

关键词： Polygonum capitatum Chemical composition Anti-inflammatory activity

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反-反本质主义:寻找变化中的同一

山东师范大学学报（社会科学版） 2024年第3期69卷 57-67页

作者：和磊山东师范大学文学院山东济南250014

反-反本质主义最早是由英国著名的文化理论大家保罗·吉尔罗伊提出的,其基本内涵可以用“变化中的同一”来概括。此概念一经提出,就在种族研究、女性主义研究等领域产生巨大影响,像斯皮瓦克的“策略性本质主义”等一些概念也被看作反-... 详细信息

反-反本质主义最早是由英国著名的文化理论大家保罗·吉尔罗伊提出的,其基本内涵可以用“变化中的同一”来概括。此概念一经提出,就在种族研究、女性主义研究等领域产生巨大影响,像斯皮瓦克的“策略性本质主义”等一些概念也被看作反-反本质主义而一起讨论。首先,反-反本质主义通过保持事物本身的具体同一性,建立一个更具包容性的新的逻辑起点。这个逻辑起点不是规定性的(本质主义),而是基于研究对象的现实经验表达,是描述性的,甚至是事实性的。其次,反-反本质主义通过双重定位,力求在差异中实现事物的不断“生成”,即在不断变化中实现事物的自我创造。再次,反-反本质主义通过策略性的停顿,实现对事物变化中的同一性认知,其目的是为了现实的具体政治行动。如何在快速流动的多样性的世界中超越本质主义与反本质主义的认识论模式,是人类在后现代主义之始就一直探索的重要课题,借助反-反本质主义这一概念,可以推进对这一课题的进一步思考。

关键词：反-反本质主义本质主义反本质主义保罗·吉尔罗伊变化中的同一

初小雨分散调蓄系统在水环境整治工程中的应用

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中国给水排水 2024年第6期40卷 118-125页

作者：何磊上海市政工程设计研究总院<集团>有限公司上海200092

初小雨径流污染控制已成为茅洲河流域由旱季水质达标转向雨季水质达标的关键因素之一。深圳市光明区坚持“分散调蓄、三水分离”的治水理念和“源头收集、过程调蓄、末端处理”的初小雨污染控制思路,基本建成污水、雨水和初小雨三套排... 详细信息

初小雨径流污染控制已成为茅洲河流域由旱季水质达标转向雨季水质达标的关键因素之一。深圳市光明区坚持“分散调蓄、三水分离”的治水理念和“源头收集、过程调蓄、末端处理”的初小雨污染控制思路,基本建成污水、雨水和初小雨三套排水系统,初步实现了初小雨污染的源头削减与控制,切实为茅洲河流域的水环境质量提升和雨水资源综合利用提供有力支撑,在水环境整治中发挥关键作用。总结该工程的初小雨截流标准、截流系统、处理系统和调度运行等经验,可为类似工程提供参考。

关键词：初小雨系统分散调蓄源头收集过程调蓄就地回用

Experimental and numerical investigations on acoustic damping of monoclinic crystalline wideband sound absorbing structures

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Journal of Central South University 2024年第6期31卷 1931-1944页

作者： XIE Su-chao he lei YAN Hong-yu ZHANG Feng-yi he Guan-di WANG Jia-cheng Key Laboratory of Traffic Safety on Track Ministry of EducationSchool of Traffic&Transportation EngineeringCentral South UniversityChangsha 410075China Joint International Research Laboratory of Key Technology for Rail Traffic Safety Changsha 410075China National&Local Joint Engineering Research Center of Safety Technology for Rail Vehicle Changsha 410075China

In order to overcome the limitations of traditional microperforated plate with narrow sound absorption bandwidth and a single structure,two multi-cavity composite sound-absorbing materials were designed based on the shape of monoclinic crystals:uniaxial oblique structure(UOS)and biaxial oblique structure(BOS).Through finite element simulation and experimental research,the theoretical models of UOS and BOS were verified,and their sound absorption mechanisms were *** the same time,the influence of multi-cavity composites on sound absorption performance was analyzed based on the theoretical model,and the influence of structural parameters on sound absorption performance was *** research results show that,in the range of 100-2000 Hz,UOS has three sound absorption peaks and BOS has five sound absorption *** frequency range of the half-absorption bandwidth(α>0.5)of UOS and BOS increases by 242% and 229%,*** with traditional microperforated sound-absorbing structures,the series and parallel hybrid methods significantly increase the sound-absorbing bandwidth of the sound-absorbing *** research has guiding significance for noise control and has broad application prospects in the fields of transportation,construction,and mechanical design.

关键词： monoclinic crystal microperforated plate acoustic metamaterials inclined cavity sound absorption