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Journal of Systems Science and Systems Engineering 2024年第1期33卷 52-76页

作者： Shimin Sun Yongheng Wang yawen Wang Mengyu Mao School of Business Administration Northeastern UniversityShenyang110169China

CEO compensation stickiness represents an important indicator to measure the effectiveness of compensation *** study uses CEO career experience data and compensation stickiness data from Shanghai and Shenzhen A-share listed companies from 2015 to 2020 to investigate the compensation contracts’effectiveness of CEOs with diverse career *** findings are as follows:1)Compensation stickiness is more pronounced for CEOs with diverse career *** to the mechanism test,these CEOs with diverse career experiences can obtain compensation incentives by reducing corporate uncertainty perception and improving total factor *** approach leads to increased compensation stickiness and the effectiveness of compensation *** with diverse career experiences may receive excess compensation by raising agency costs,which intensifies compensation stickiness and weakens the effectiveness of compensation contracts.2)Compensation stickiness of CEOs with diverse career experiences is more significant in companies with lower investor protection,which brings about less effective compensation *** contrast,in companies with higher diversification,the compensation stickiness of CEOs with diverse career experiences is more significant,which delivers more effective compensation *** conclusions deepen the research of CEO compensation contracts and provide a helpful reference for CEO compensation management practices.

关键词： CEOs’diverse career experiences effectiveness of compensation contracts compensation stickiness agency problems incentive mechanisms

Donor-acceptor covalent organic frameworks-confined ultrafine bimetallic Pt-based nanoclusters for enhanced photocatalytic H_(2)generation

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Nano Research 2024年第7期17卷 5835-5844页

作者： Yu Liu yawen Shi Hua Wang Shengbo Zhang Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Key Laboratory for Green Chemical Technology of the Ministry of EducationSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China School of Environmental Science and Engineering Tianjin Key Laboratory of Biomass/Wastes UtilizationTianjin UniversityTianjin 300350China

Photocatalytic hydrogen generation from hydrogen storage media is an effective and promising approach for the green hydrogen industry as well as for achieving carbon neutrality ***,the lower photocatalytic efficiency due to the limited light trapping capacity,low electron transfer rate,and severe aggregation of nanoparticles caused by high surface energy seriously restricts their practical ***,we constructed a series of donor–acceptor(D–A)type covalent organic frameworks to confine ultrafine bimetallic Pt-based nanoclusters for photocatalytic hydrogen generation from ammonia borane(AB)*** visible light irradiation at 20℃,PtCo_(2)@covalent organic framework(COF)showed the highest photocatalytic activity with a turnover frequency(TOF)of 486 min−*** and density functional theory(DFT)calculations reveal that the high catalytic activity is mainly attributed to the strong electronic interactions between D–A type COF and ultrafine PtCo_(2)***,the D–A type COF can significantly enhance the light-trapping ability by fine-tuning the electron-acceptor type in the framework,and accelerate the photogenerated electron transfer from D–A type COF to PtCo_(2)nanocluster,which promotes the adsorption and activation of H_(2)O and AB molecules and accelerates hydrogen ***,PtCo_(2)@COF also exhibited ultra-high durability due to the significantly enhanced resistance to nanocluster aggregation caused by the nanopore confinement effect of D–A type *** believe that this work will provide a theoretical guide for the rational design of efficient D–A COFbased catalysts for photocatalysis.

关键词： light trapping electron transfer donor-acceptor covalent organic frameworks(D-A COFs) bimetallic nanoclusters photocatalysis

Reduction potential of the energy penalty for CO_(2) capture in CCS

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Frontiers in Energy 2023年第3期17卷 390-399页

作者： yawen ZHENG Lin GAO Song HE Hongguang JIN Laboratory of Integrated Energy System and Renewable Energy Institute of Engineering ThermophysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

CO_(2) capture and storage(CCS)has been acknowledged as an essential part of a portfolio of technologies that are required to achieve cost-effective long-term CO_(2) ***,the development progress of CCS technologies is far behind the targets set by roadmaps,and engineering practices do not lead to commercial *** of the crucial reasons for this delay lies in the unaffordable penalty caused by CO_(2) capture,even though the technology has been commonly recognized as *** the aspects of separation and capture technology innovation,the potential and promising direction for solving this problem were analyzed,and correspondingly,the possible path for deployment of CCS in China was *** the carbon neutral target recently proposed by the Chinese government,the role of CCS and the key milestones for deployment were indicated.

关键词： CO_(2)capture and storage(CCS) CO_(2)separation energy penalty

Successive construction of cucurbit[8]uril-based covalent organic frameworks from a supramolecular organic framework through photochemical reactions in water

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Science China Chemistry 2022年第7期65卷 1279-1285页

作者： yawen Li Chaochao Yan Qingfang Li Liping Cao College of Chemistry and Materials Science Northwest UniversityXi’an 710069China Frontier Institute of Science and Technology Xi’an Jiaotong UniversityXi’an710054China

Functional framework materials have been developed for many applications including adsorption, asymmetric catalysis, sensing,drug delivery, optical device, and so on. Here, we report the successive construction of two cucurbit[8]uril-based covalent organic frameworks(COFs) including tetraphenylethene-based COF(COF-1) and phenanthrene-based COF(COF-2) from a two-dimensional(2D) periodic cucurbit[8]uril-based supramolecular organic framework(SOF-1) as the prearranged structure via the intermolecular photocycloaddition of the coumarin units and the intramolecular photocyclization of the tetraphenylethene(TPE) units under ultraviolet(UV) irradiation(365 nm) in water. In this case, oxygen(O_(2)) plays an important role in the photocyclization of the TPE units into the phenanthrene units in the transform process from SOF-1 or COF-1 to COF-2. As the TPE units further form phenanthrenes after UV-irradiation, COF-2 exhibits aggregation-caused quenching effect and weak green emission, while COF-1 displays a strong yellow emission due to the aggregation-induced emission. Besides, the adaptive chirality of cationic COF-1 as a biomolecular sensor can be efficiently induced by chiral anionic biomolecules including adenosine-5′-triphosphate(ATP) and adenosine-5′-diphosphate(ADP) to exhibit sensitive negative circular dichroism responses in water. This supramolecular approach to construct COF from SOF via photochemical reactions may open a new opportunity for the construction and application of the water-soluble COFs with well structural controllability, unique photophysical properties,and favorable biocompatibility.

关键词： covalent organic framework supramolecular organic framework cucurbituril photochemical reaction adaptive chirality

Optimal Kalman-like filter for a class of nonlinear stochastic systems

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Journal of Ocean Engineering and Science 2023年第5期8卷 500-507页

作者： Shulan Kong yawen Sun Huanshui Zhang School of Mathematics Science Qufu Normal UniversityQufuChina College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdaoChina

This paper deals with an optimal Kalman-like filter for nonlinear discrete-time systems aided with auto and cross-correlated noises and stochastic parameter matrices involved in state and measurement equa-tions,and random *** random variables are proposed by their statistical characteristics while the inquiry is focused on stochastic multivariate analysis and *** the nonlinear sys-tem with the auto and cross-correlated noises and stochastic parameter matrices,an equivalent system is first reconstructed by decomposing stochastic parameter matrices and introducing uncorrelated *** a recursive filter that ensures unbiasedness and minimizes the error variance is designed for the newly transformed equivalent ***,the filter is verified by applying it to some numerical simulations.

关键词： Kalman-like filter Multivariate analysis Auto-correlated and cross-correlated stochastic parameters Uncorrelated pseudo-noises

A 38-Year Climatology of Explosive Cyclones over the Northern Hemisphere

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Advances in Atmospheric Sciences 2020年第2期37卷 143-159页

作者： Gang FU yawen SUN Jilin SUN Pengyuan LI Department of Marine Meteorology Ocean−Atmosphere Interaction and Climate LaboratoryKey Laboratory of Physical OceanographyOcean University of ChinaQingdao 266100China Division of Oceanic Dynamics and Climate Qingdao National Laboratory for Marine Science and TechnologyQingdao 266100China North China Sea Marine Forecasting Center Qingdao 266100China Shandong Provincial Key Laboratory of Marine Ecological Environment and Disaster Prevention and Mitigation Qingdao 266100China

Explosive cyclones(ECs)over two basins in the Northern Hemisphere(20°-90°N)from January 1979 to December2016 are investigated using ERA-Interim and Optimum Interpolation Sea Surface Temperature(OISST)*** classical definition of an EC is modified considering not only the rapid drop of the central sea level pressure of the cyclone,but also the strong wind speed at the height of 10 m in which maximum wind speeds greater than 17.2 m s^-1are *** to the locations of the northern Atlantic and northern Pacific,the whole Northern Hemisphere is divided into the"A region"(20°-90°N,90°W-90°E)and"P region"(20°-90°N,90°E-90°W).Over both the A and P regions,the climatological features of ECs,such as their spatial distribution,intensity,seasonal variation,interannual variation,and moving tracks,are documented.

关键词： explosive cyclone Atlantic basin Pacific basin Northern Hemisphere annual climatology seasonal climatology spatial distribution moving track

Optical colorimetric sensor arrays for chemical and biological analysis

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Science China Chemistry 2018年第6期61卷 643-655页

作者： Yufan Ma yawen Li Kun Ma Zhuo Wang Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Chemical Resource EngineeringCollege of Science Beijing University of Chemical Technology Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences

In recent years, the sensor array has attracted much attention in the field of complex system analysis on the basis of its good selectivity and easy operation. Many optical colorimetric sensor arrays are designed to analyze multi-target analytes due to the good sensitivity of optical signal. In this review, we introduce the targeting analytes, sensing mechanisms and data processing methods of the optical colorimetric sensor array based on optical probes(including organic molecular probes, polymer materials and nanomaterials). The research progress in the detection of metal ions, anions, toxic gases, organic compounds, biomolecules and living organisms(such as DNA, amino acids, proteins, microbes and cells) and actual sample mixtures are summarized *** review illustrates the types, application advantages and development prospects of the optical colorimetric sensor array to help broad readers to understand the research progress in the application of chemical sensor array.

关键词： sensor array optical colorimetric chemical analysis biological analysis

Diagnostic Analyses and Numerical Modeling of Explosive Cyclone over Northwestern Pacific on January 11-13,2012

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Journal of Ocean University of China 2022年第4期21卷 935-945页

作者： WANG Guanlan SUN Baitang SUN yawen LI Pengyuan National Meteorological Center Beijing 100081China College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China

In this paper,we use FNL grid data obtained from the National Centers for Environmental Prediction(NCEP)to analyze an explosive cyclone(EC)that occurred over the northwestern Pacific Ocean from January 11 to 13,*** simulate the EC,we used the Weather Research and Forecasting model(WRFV3.5).The cyclone outbreak occurred east of Japan from January 11 to 12 and weakened near the Kamchatka Peninsula on January *** analysis results show a distinct frontal structure,in which the high potential vorticity(PV)of the upper troposphere extends downward to the surface,which can facilitate EC development.A low-level jet stream develops with the EC,which can lead to more distinct *** results of sea surface temperature(SST)sensitivity tests suggest that changes in the SST can affect cyclone intensity,but have little effect on its *** small changes are made to the SST,the air pressure at the cyclonic center responds more distinctly to an increased SST than a decreased *** results of our latent heat release test suggest that diabatic heating processes lead to maximum PV values in the lower *** heat is also one of the important factors influencing EC development.

关键词： northwestern Pacific explosive cyclone diagnostic analyses SST sensitivity tests latent heat release test

Immunological memory:ILC1s come into view

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Cellular & Molecular Immunology 2019年第12期16卷 895-896页

作者： yawen Chen Zhigang Tian Hui Peng Division of Molecular Medicine Hefei National Laboratory for Physical Sciences at the Microscalethe CAS Key Laboratory of Innate Immunity and Chronic DiseaseSchool of Life SciencesUniversity of Science and Technology of ChinaHefei 230027 AnhuiChina Institute of Immunology University of Science and Technology of ChinaHefei 230027 AnhuiChina

Immunological memory is traditionally thought to be an important property that distinguishes adaptive immunity from innate *** T and B lymphocytes,innate lymphoid cells(ILCs)lack rearranged antigen ***,increasing evidence implies that ILCs are capable of conferring antigenspecific memory responses in different experimental *** these models,natural killer(NK)cell-mediated memory responses during mouse cytomegalovirus(MCMV)infection have been extensively studied.1 The generation of MCMV-specific memory NK cells is dependent on the recognition of MCMVencoded glycoprotein m157 by the activating receptor Ly49H.2 MCMV-induced memory NK cells circulate in the *** contrast to circulating NK cells,other subsets in the ILC family are mostly tissue-resident cells.3 Whether tissue-resident ILCs mediate MCMVspecific memory responses is ***,Weizman et al.4 reported that ILC1s can confer antigen-specific memory responses in the liver during MCMV infection(Fig.1).

关键词： immunity Immunological mostly

Thermospheric density responses to Martian dust storm in autumn based on MAVEN data

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Geodesy and Geodynamics 2022年第6期13卷 595-601页

作者： Peng Han Shuanggen Jin Jiandong Liu yawen Li School of Remote Sensing and Geomatics Engineering Nanjing University of Information Science and TechnologyNanjing 210044China School of Surveying and Land Information Engineering Henan Polytechnic UniversityJiaozuo 454000China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Nanjing University of Science and Technology Nanjing 210094

The unique seasonal surface dust storms on Mars have a significant impact on the Martian ***,due to the lack of observations,semi-empirical models are difficult to simulate the density changes in the thermosphere with the existence of dust storms in *** from multiple Mars probes now offer new opportunities to study the detailed response of Martian dust storms to the upper *** this paper,we use MAVEN accelerometer and mass spectrometer to study the variations of the Martian thermosphere density in autumn between MY32 and MY34(The corresponding Earth dates:February 11,2015 to February 28,2019),and use the seasonal model with dust storm index to fit the annual data of the above three Martian *** results show that the thermosphere density has a clear response to the surface dust storm ***,the spatial distribution of measured data in autumn(northern hemisphere)is compared with the atmospheric density distribution simulated by the general circulation model(GCM)under specific initial *** model simulation results agree well with the thermospheric density distribution characteristics of each Martian year under the initial strong dust storm *** proves the important role of global dust storm in changing the structure of the Martian thermospheric atmosphere.

关键词： Mars Thermospheric atmosphere Dust storm GCM simulation