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Modular assembly of Co4-thiacalix[4]arene units and Keggin-type SiW12O40 for visible-light photothermal conversion

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Tungsten 2025年第1期7卷 112-119页

作者： Jia-Hui Li Qing zhao Dong-Ao Mao Kun Zhou Bao-Kuan Chen Yan-Feng bi School of Petrochemical Engineering Liaoning Petrochemical University

The construction of metal-organic coordination clusters（MCCs） using modular secondary building units is an important method for preparing functional *** this study,two new MCCs modularly assembled from Keggin-type {SiW12O40}H4TC4A=p-tert-Butylthiacalix[4]arene(SiW12) units and thiacalixarene-supported Co4-thiacalix[4]arene(Co4-TC4A polynuclear second-building units（PSBUs,H4TC4A=p-tert-Butylthiacalix[4]arene） are *** two MCCs,abbreviated as Co4-SiW12and Co8-SiW12,were structurally characterized by single-crystal X-ray *** Co4-SiW12is a supramolecular structure involving cation-anion interactions between Co4-TC4A PSBUs and ***8-SiW12features "barbell-like" shapes with two Co4-TC4A coordinatively linked to a Keggin-type SiW12unit on opposite via W-O_t-Co *** coordination of Co4-TC4A to SiW12in Co8-SiW12resulted in significantly improved photothermal conversion performances compared with Co4-SiW12and pure SiW12or ***-gap determination and photophysical analysis combined with density functional theory calculations indicated the binding mode between Co4-TC4A PSBUs and SiW12,which considerably influences the way of electron transport and the conversion ability of visible light to heat.

关键词： Modular construction Photothermal conversion Polyoxometalate Thiacalixarene

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从家庭视角看中国女性劳动参与率的下降趋势

武汉大学学报（哲学社会科学版） 2025年第1期78卷 133-145页

作者：赵耀辉毕汝岱武汉大学武汉大学董辅礽经济社会发展研究院湖北武汉430072 北京大学国家发展研究院北京100091

随着社会经济的发展和人口结构的深刻调整,中国女性劳动参与率发生了显著变化。改革开放初期,中国女性劳动参与率显著高于欧美主要发达国家的水平,但近年来大幅下降,已接近其平均值。研究发现,已生育女性劳动参与率的下降是整体趋势的... 详细信息

随着社会经济的发展和人口结构的深刻调整,中国女性劳动参与率发生了显著变化。改革开放初期,中国女性劳动参与率显著高于欧美主要发达国家的水平,但近年来大幅下降,已接近其平均值。研究发现,已生育女性劳动参与率的下降是整体趋势的主要驱动力,而婚育模式的转变在一定程度上对这一趋势起到了缓冲作用。对于已婚女性而言,学龄前子女的照料负担逐渐成为劳动市场参与的核心制约因素。女性教育水平的提升通过禀赋和系数效应显著促进了劳动参与,但配偶教育水平的影响由正向转为负向,说明家庭收入能力的提高减弱了女性劳动参与的经济动机,强化了性别分工的传统趋势。优化育儿支持体系、促进性别平等以及营造职场友好环境,是缓解婚育负担对女性劳动市场参与约束的关键政策方向。

关键词：女性劳动参与率婚育模式育儿成本

Exit options sustain altruistic punishment and decrease the second-order free-riders, but it is not a panacea

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Science China(Information Sciences) 2025年第1期68卷 278-291页

作者： Chen SHEN zhao SONG Lei SHI Jun TANIMOTO Zhen WANG Faculty of Engineering Sciences Kyushu University School of Statistics and Mathematics Yunnan University of Finance and Economics School of Computing Engineering and Digital Technologies Teesside University School of Artificial Intelligence OPtics and Electro Nics (iOPEN) Northwestern Polytechnical University

Why do humans punish free riders at their own expense? This behavior represents an evolutionary puzzle in human societies. This study explores the role of exit strategies in fostering altruistic punishment within evolutionary game theory. We extend the traditional prisoner's dilemma model by incorporating exiters, players who opt out for a small payoff while nullifying their opponent's payoff, and altruistic punishers who cooperate and punish non-cooperators. Our findings indicate that in well-mixed populations, exiters destabilize defection but do not promote altruistic punishment. In social networks, however,exiters enable altruistic punishment via cyclic dominance among altruistic punishers, defectors, and exiters. Notably, this cyclic dominance is sensitive to exit payoffs; adjustments can lead to cyclic dominance of non-punishing cooperators, defectors, and exiters, or to a bi-stable state between these two types of cyclic dominance. These results highlight the nuanced impact of exiters on altruistic punishment, emphasizing the need for careful incentivization of exit behavior. While exiters can support altruistic punishment in networked populations, their effectiveness is not a panacea and is highly sensitive to exit payoffs, indicating limits to the voluntary participation mechanism.

关键词： evolutionary game theory altruistic punishment coexistence cyclic dominance bi-stable

不同烫漂方式及冷冻速率对预制西兰花质构品质的影响

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食品科学 2025年第1期46卷 121-130页

作者：赵伊诺金鑫毕金峰谢意通杜婷天津科技大学食品科学与工程学院天津300457 中国农业科学院农产品加工研究所农业农村部农产品加工重点实验室北京100193 沈阳农业大学食品学院辽宁沈阳110866

为探究预制西兰花加工过程中烫漂方式及冷冻速率对西兰花质构品质的影响,对经2种烫漂方式(热水烫漂、蒸汽烫漂)及3种冷冻温度(-20、-40、-80℃)处理的西兰花样品,利用低场核磁共振、理化特性分析方法测定不同处理组样品的水分分布、持... 详细信息

为探究预制西兰花加工过程中烫漂方式及冷冻速率对西兰花质构品质的影响,对经2种烫漂方式(热水烫漂、蒸汽烫漂)及3种冷冻温度(-20、-40、-80℃)处理的西兰花样品,利用低场核磁共振、理化特性分析方法测定不同处理组样品的水分分布、持水性、相对电导率和硬度,观察微观结构。结果表明:维持西兰花硬度的最佳工艺为蒸汽烫漂后进行-40℃冷冻,在此工艺条件下,与对照组相比,处理组西兰花水分分布中结合水峰面积占比(A21)增加最多、持水性最强,花序部分保留66.72%硬度、茎部分保留62.53%硬度,相对电导率增加至87.01%;通过扫描电子显微镜观察发现,经过该处理的西兰花保持了较好的细胞结构。本研究得到了有效维持解冻西兰花质构的工艺,并揭示了不同处理对西兰花水分分布及细胞膜完整性影响的机制,为实际生产过程保持冷冻预制西兰花品质提供了理论与技术支撑。

关键词：预制西兰花持水性水分迁移质构

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心衰患者窦性心率震荡检测及多因素影响分析

中国实用内科杂志 2005年第1期25卷 46-47,73页

作者：赵进军赵继义毕亚艳高冠宇章洪英黄永麟哈尔滨医科大学第一临床医学院心内科 150001

目的　观察心力衰竭患者窦性心率震荡 (HRT)现象的特征并探讨其临床意义。方法　 2 0 0 4 - 0 1～ 0 4哈尔滨医科大学第一临床医学院门诊 30例心衰患者及 30名健康对照者均接受 2 4hHolter检查 ,分别计算HRT的初始值 (TO)、HRT的斜率 (T... 详细信息

目的　观察心力衰竭患者窦性心率震荡 (HRT)现象的特征并探讨其临床意义。方法　 2 0 0 4 - 0 1～ 0 4哈尔滨医科大学第一临床医学院门诊 30例心衰患者及 30名健康对照者均接受 2 4hHolter检查 ,分别计算HRT的初始值 (TO)、HRT的斜率 (TS) ,并进行TO、TS与年龄、左室射血分数 (LVEF)、左室舒张末期内径 (LVED)、室早数目、室早前心率、联律间期、代偿间期的相关分析及不同起源室早TO、TS的组间比较。结果　心衰者与健康者HRT间存在明显差别 :心衰者TO明显高于对照者 (0 5 7± 4 71%与 - 1 5 6± 2 6 0 % ,P <0 0 2 5 ) ;心衰者TS明显低于对照者 (3 17± 2 0 3%与 9 6 4± 6 4 7,P <0 0 0 1)。TO、TS与年龄、LVEF、LVED、室早数目相关 ,与室早前心率、联律间期、代偿间期不相关 ,起源不同室早的TO、TS间无明显差异。结论　慢性心衰患者中窦性心率震荡现象明显减弱 ,由于TO、TS与LVEF、LVED相关 ,可凭借TO、TS对心衰患者进行危险分层 ,但它对预后的预测价值有待于大样本长期随访来证实。

关键词：室早心衰心率患者 TS 窦性 HRT 目的观结论现象

光电监测英仙座一个亮蓝致密反射星云的照明星

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天文学报 1984年第2期 136-141页

作者：初毓桦赵昭旺王毕中国科学院紫金山天文台中国科学院云南天文台

本文报道了对英仙座一颗亮蓝致密反射星云的照明星所进行的三色光电监测。从1983年2月4/5夜的观测得知,这个天体仍有明显变光,但变幅已较1979年的为小。2月5/6夜观测到的光起伏,已和校验星的观测误差相近,由此推测,在近几年内,这个天体... 详细信息

本文报道了对英仙座一颗亮蓝致密反射星云的照明星所进行的三色光电监测。从1983年2月4/5夜的观测得知,这个天体仍有明显变光,但变幅已较1979年的为小。2月5/6夜观测到的光起伏,已和校验星的观测误差相近,由此推测,在近几年内,这个天体的中央星可能出现气壳活动的稳定期。

关键词：英仙座光电监测英仙星座反射星云尘埃星云致密亮蓝

High-precision magnetic field measurement system based on a coherent population trapping magnetometer onboard the SATech-01 satellite

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Science China Technological Sciences 2025年

作者： Hongbo XUE Wei SONG Haoran zhao Yiteng ZHANG Shanzhi YE Jindong WANG Ran TAO Peng SANG Keli CHEN Xingzi bi bingjun CHENG bin ZHOU Yongliang XUE Yingying TANG Liu LIU Jinsong LI Xiaocheng ZHU Baoquan LI Jinguo LIU Wen CHEN Xiaofeng ZHANG Yonghe ZHANG Lei LI State Key Laboratory of Space Weather National Space Science Center Chinese Academy of Sciences Key Laboratory of Solar Activity and Space Weather National Space Science Center Chinese Academy of Sciences Key Laboratory of Electronics and Information Technology for Space Systems National Space Science Center Chinese Academy of Sciences State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Innovation Academy for Microsatellites Chinese Academy of Sciences

On July 27, 2022, a high-precision system for measuring the magnetic field based on a coherent population trapping magnetometer（referred to as the CPT system） was launched onboard the Space Advanced Technology demonstration satellite（SATech-01） by a ZK-1A rocket. The payload comprises a scalar coherent population trapping magnetometer（CPTM）, triaxial anisotropic magnetoresistance magnetometer（AMRM）, and nano star tracker mounted on a non-magnetic telescopic tubular mast. This configuration enables synchronized measurement of scalar and vector geomagnetic fields, as well as the attitude,making the payload with its compact sensors suitable for applications on miniature satellite platforms. On November 7, 2022,the novel telescopic tubular mast was deployed in orbit, extending to a length of 5.28 m. The CPTM, an absolute scalar magnetometer with an omnidirectional sensor, is the first China-developed quantum/atomic magnetometer successfully operating in space. In orbit, the CPTM has sensitivity of ～10 pT/Hz1/2and can automatically operate under complex magnetic field variations. The difference between the scalar fields obtained using the CPTM and CHAOS model has a mean deviation of–3.73 n T and a standard deviation of 26.11 nT（1σ）, without on-orbit calibration or correction. The miniaturized AMRM has a sensitivity of ～0.3 n T/Hz1/2and maintains stable and reliable operation in orbit. The low-power and miniaturized nano star tracker has a measurement uncertainty of 14.23″（1σ） in orbit. The mission has realized the on-orbit technical verification of the integrated and synchronized detection of the vector magnetic field and attitude and fully validated the system's performance,automation level, and reliability.

关键词：

Data-driven intelligent modeling framework for the steam cracking process

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Chinese Journal of Chemical Engineering 2023年第9期61卷 237-247页

作者： Qiming zhao Kexin bi Tong Qiu Department of Chemical Engineering Tsinghua UniversityBeijing 100084China Beijing Key Laboratory of Industrial big Data Systems and Applications Tsinghua UniversityBeijing 100084China School of Chemical Engineering Sichuan UniversitySichuan 610065China Department of bioprocess Engineering Institute of BiotechnologyTechnische Universität BerlinBerlin 10623Germany

Steam cracking is the dominant technology for producing light olefins,which are believed to be the foundation of the chemical *** models of the cracking process can boost production efficiency and profit *** advancements in machine learning research have recently enabled data-driven solutions to usher in a new era of process ***,its practical application to steam cracking is still hindered by the trade-off between prediction accuracy and computational *** research presents a framework for data-driven intelligent modeling of the steam cracking *** data preparation and feature engineering techniques provide computational-ready datasets for the framework,and feedstock similarities are exploited using k-means *** propose LArge-Residuals-Deletion Multivariate Adaptive Regression Spline(LARD-MARS),a modeling approach that explicitly generates output formulas and eliminates potentially outlying *** framework is validated further by the presentation of clustering results,the explanation of variable importance,and the testing and comparison of model performance.

关键词： Mathematical modeling Data-driven modeling Process systems Steam cracking Clustering Multivariate adaptive regression spline

Iterative parameter estimate with batched binary-valued observations

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Science China(Information Sciences) 2016年第5期59卷 158-175页

作者： Yanlong zhao Wenjian bi Ting WANG Key Laboratory of Systems and Control Academy of Mathematics and Systems ScienceChinese Academy of Sciences

In this paper, we consider linear system identification with batched binary-valued *** constructed an iterative parameter estimate algorithm to achieve the maximum likelihood(ML) *** first interesting result was that there exists at most one finite ML solution for this specific maximum likelihood problem, which was induced by the fact that the Hessian matrix of the log-likelihood function was negative definite under binary data and Gaussian system noises. The global concave property and local strongly concave property of the log-likelihood function were obtained. Under mild conditions on the system input, we proved that the ML function has a unique maximum point. The second main result was that the ML estimate was consistent under persistent excitation inputs, which infers the effectiveness of ML estimate. Finally, the proposed iterative estimate algorithm converged to a fixed vector with an exponential rate that was proved by constructing a Lyapunov function. A more interesting result was that the limit of the iterative algorithm achieved the maximization of the ML function. Numerical simulations are illustrated to support the theoretical results obtained in this paper well.

关键词： binary-valued observation maximum likelihood estimate strongly convex system identification exponential rate