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Responses of Tree species to Climate Warming at Different spatial scales

Chinese Geographical science 2011年第4期21卷 427-436页

作者： LIANG yu HE Hong s LEWIs Bernard L state Key Laboratory of Forest and soil Ecology Institute of Applied EcologyChinese Academy of SciencesShenyang 110164China school of Natural Resources University of Missouri-Columbia203m Anheuser-Busch Natural Resources BuildingColumbiaMissouri 65211-7270USA Graduate University of Chinese Academy of sciences Beijing 100049China

Tree species respond to climate change at multiple scales,such as species physiological response at fine scale and species distribution (quantified by percent area) at broader spatial *** a given spatial scale,species physiological response and distribution can be correlated positively or *** consistency of such correlation relationships at different spatial scales determines whether species responses derived from local scales can be extrapo-lated to broader spatial *** this study,we used a coupled modeling approach that coupled a plot-level ecosystem process model (LINKAGEs) with a spatially explicit landscape model (LANDIs).We investigated species physio-logical responses and distribution responses to climate warming at the local,zonal and landscape scales respectively,and examined how species physiological response and distribution correlated at each corresponding scale and whether the correlations were consistent among these *** results indicate that for zonal and warming-sensitive species,the correlations between species physiological response and distribution are consistent at these spatial scales,and therefore the research results of vegetation response to climate warming at the local scale can be extrapolated to the zonal and landscape *** contrast,for zonal and warming-insensitive species the correlations among different spatial scales are consistent at some spatial scales but at other *** results also suggest that the results of azonal species at the local scale near their distribution boundaries can not be extrapolated simply to broader scales due to stronger responses to climate warming in those boundary regions.

关键词： climate warming vegetation response local scale zonal scale landscape scale LANDIs Changbai Mountains

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Enhanced and irreversible sorption of pesticide pyrimethanil by soil amended with biochars

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Journal of Environmental sciences 2010年第4期22卷 615-620页

作者： Xiangyang yu Ligang Pan Guangguo Ying Rai s. Kookana Pesticide Biological 6 Ecological Research Center Jiangsu Academy of Agricultural Sciences Nanjing 210014 China. CsIRO Land and Water PMB No 2 Glen Osmond 50641 South Australia Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Beijing Research Center for Agrifood Testing and Farmland Monitoring Beijing 100097 China

Biochar derived from partial combustion of vegetation is ubiquitous and potentially effective in sequestration of environmental contaminants. Biochars were prepared by burning of red gum （Eucalyptus spp.） woodchips at 450 and 850℃ （labeled as BC450 and BC850）. These two biochars were found to possess markedly different properties in terms of surface area and porosity. short-term equilibration tests （24 hr） were conducted to assess the sorption-desorption behavior of pyrimethanil in the soil amended with various amounts of biochar of each type, with a special focus on the desorption behavior of the sorbed pesticide through four times successive desorption by dilution. sorption coefficient and isotherm nonlinearity of the amended soils progressively increased with the content of biochar in the soil. Biochar BC850 with higher surface area and microporosity showed a stronger effect on the reversibility of sorption pesticide. The soils amended with 5% BC450 and 1% BC850 had nearly the same sorption capacity for pyrimethanil; however, their desorption processes were very different with 13.65% and 1.49% of the sorbed pesticide being released, respectively. This study suggested that biochar in soil could be an important factor for immobilization of a pesticide and thus affecting its environment fate in soil.

关键词： biochar pyrimethanil sorption desorption

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Design and experimental validation of looped-tube thermoacoustic engine

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Journal of Thermal science 2011年第5期20卷 423-429页

作者： Abdulrahman s. Abduljalil Zhibin yu Artur J. Jaworski University of Manchester School of MACE Sackville Street Manchester M13 9PL UK University of Leicester Department of Engineering University Road Leicester LE1 7RH UK

The aim of this paper is to present the design and experimental validation process for a thermoacoustic looped-tube engine. The design procedure consists of numerical modelling of the system using DELTA EC tool, Design Environment for Low-amplitude ThermoAcousfic Energy Conversion, in particular the effects of mean pressure and regenerator configuration on the pressure amplitude and acoustic power generated. This is followed by the construction of a practical engine system equipped with a ceramic regenerator - a substrate used in auto- motive catalytic converters with fine square channels. The preliminary testing results are obtained and compared with the simulations in *** measurement results agree very well on the qualitative level and are reasonably close in the quantitative sense.

关键词： Thermoacoustic engine looped tube modelling simulation

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synthesis of chiral phosphine derivatives through a copper（I）-catalyzed desymmetric sNAr reaction

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science China Chemistry 2025年

作者： shuai Zhang Pei-Zhi Liu Yan-Bo Li Qi Zhang Jun-Zhao Xiao Yi-Fan Wang Tian-yu Wei Jia-Wei Jiang Ye Wang Qian Peng Liang Yin Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences state Key Laboratory of Elemento-Organic Chemistry and Tianjin Key Laboratory of Biosensing and Molecular Recognition College of Chemistry Frontiers Science Center for New Organic Matter Nankai University Haihe Laboratory of sustainable Chemical Transformations

Axially chiral phosphines are a class of extremely important ligands in asymmetric catalysis. Herein, an unprecedented copper（I）-catalyzed asymmetric sNAr reaction with HP（s）R2is uncovered, which delivers a series of axially chiral phosphine derivatives in high yields with excellent enantioselectivity. Furthermore, the diastereoselective reaction with the kinetic resolution of racemic HP（s）ArR proceeds smoothly, providing the products with moderate diastereoselectivity and excellent enantioselectivity. Control experiments indicate that HP（s）Ph2is much more active than HPPh2and HP（O）Ph2as the pronucleophile in the present reaction. It is found that the sNAr reaction （the first sNAr） proceeds in a desymmetric manner, providing the desired chiral products while a continued sNAr reaction （the second sNAr） slightly occurs in a kinetic resolution manner in the present catalytic system, which enhances the ee of the desired chiral products. DFTcalculations support a concerted reaction pathway rather than a step-wise mechanism. Finally, axially chiral olefin-phosphines produced by the present method work as suitable ligands in Pdcatalyzed asymmetric allylic substitution with C-, N-, and O-nucleophiles and Rh-catalyzed asymmetric addition of arylboronic acid to benzil.

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Weighted Probability Density Estimator with Updated Bandwidths

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Journal of systems science & Complexity 2024年第2期37卷 886-906页

作者： WU Yi yu Wei WANG Xuejun PRAKAsA RAO B L s school of Big Data and Artificial Intelligence Chizhou UniversityChizhou 247000China school of Big Data and statistics Anhui UniversityHefei 230601China CR Rao Advanced Institute of Mathematics Statistics and Computer ScienceHyderabad 500046India

In this paper,the authors study a class of weighted version of probability density *** is shown that the weighted estimator contains some existing estimators of probability density,no matter they are recursive or *** statistical results including weak consistency,strong consistency,rate of strong consistency,and asymptotic normality are established under some mild ***,the random weighted estimator is also *** numerical simulations and a real data analysis are presented to study the numerical performances of the estimators.

关键词： Asymptotic normality consistency numerical simulation probability density real data analysis updated bandwidths weighted estimator

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Accuracy comparison and improvement for state of health estimation of lithium-ion battery based on random partial recharges and feature engineering

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Journal of Energy Chemistry 2024年第5期92卷 591-604页

作者： Xingjun Li Dan yu søren Byg Vilsen Daniel Ioan stroe Department of Energy Aalborg UniversityAalborg 9220Denmark Department of Mathematical sciences Aalborg UniversityAalborg 9220Denmark Walker Department of Mechanical Engineering The University of Texas at AustinAustinTX 78712USA

state of health(sOH)estimation of e-mobilities operated in real and dynamic conditions is essential and *** of existing estimations are based on a fixed constant current charging and discharging aging profiles,which overlooked the fact that the charging and discharging profiles are random and not complete in real *** work investigates the influence of feature engineering on the accuracy of different machine learning(ML)-based sOH estimations acting on different recharging sub-profiles where a realistic battery mission profile is *** features were extracted from the battery partial recharging profiles,considering different factors such as starting voltage values,charge amount,and charging sliding ***,features were selected based on a feature selection pipeline consisting of filtering and supervised ML-based subset *** linear regression(MLR),Gaussian process regression(GPR),and support vector regression(sVR)were applied to estimate sOH,and root mean square error(RMsE)was used to evaluate and compare the estimation *** results showed that the feature selection pipeline can improve sOH estimation accuracy by 55.05%,2.57%,and 2.82%for MLR,GPR and sVR *** was demonstrated that the estimation based on partial charging profiles with lower starting voltage,large charge,and large sliding window size is more likely to achieve higher *** work hopes to give some insights into the supervised ML-based feature engineering acting on random partial recharges on sOH estimation performance and tries to fill the gap of effective sOH estimation between theoretical study and real dynamic application.

关键词： Feature engineering Dynamic forklift aging profile state of health comparison Machine learning Lithium-ion batteries

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The development of machine learning-based remaining useful life prediction for lithium-ion batteries

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Journal of Energy Chemistry 2023年第7期82卷 103-121,I0003页

作者： Xingjun Li Dan yu Vilsen søren Byg store Daniel Ioan Department of Energy Aalborg UniversityAalborg 9220Denmark Department of Mathematical sciences Aalborg UniversityAalborg 9220Denmark

Lithium-ion batteries are the most widely used energy storage devices,for which the accurate prediction of the remaining useful life(RUL)is crucial to their reliable operation and accident *** work thoroughly investigates the developmental trend of RUL prediction with machine learning(ML)algorithms based on the objective screening and statistics of related papers over the past decade to analyze the research core and find future improvement *** possibility of extending lithium-ion battery lifetime using RUL prediction results is also explored in this *** ten most used ML algorithms for RUL prediction are first identified in 380 relevant *** the general flow of RUL prediction and an in-depth introduction to the four most used signal pre-processing techniques in RUL prediction are *** research core of common ML algorithms is given first time in a uniform format in chronological *** algorithms are also compared from aspects of accuracy and characteristics comprehensively,and the novel and general improvement directions or opportunities including improvement in early prediction,local regeneration modeling,physical information fusion,generalized transfer learning,and hardware implementation are further ***,the methods of battery lifetime extension are summarized,and the feasibility of using RUL as an indicator for extending battery lifetime is *** lifetime can be extended by optimizing the charging profile serval times according to the accurate RUL prediction results online in the *** paper aims to give inspiration to the future improvement of ML algorithms in battery RUL prediction and lifetime extension strategy.

关键词： Lithium-ion batteries Remaining useful lifetime prediction Machine learning Lifetime extension

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员工主动性人格与创新行为的关系:基于趋利-避害框架理论的实证研究

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管理工程学报 2025年第2期39卷 41-56页

作者：严鸣赵楚铃朱瑜邬金涛暨南大学管理学院中山大学岭南学院

员工的创新行为能为员工个体和组织带来益处,但同时也会给员工带来较大风险,而现有研究未解决员工在面对潜在风险时仍会表现出创新行为这个问题。本文基于趋利-避害框架理论,通过163个团队的489份数据,探讨了趋利型/避害型主动性人格影... 详细信息

员工的创新行为能为员工个体和组织带来益处,但同时也会给员工带来较大风险,而现有研究未解决员工在面对潜在风险时仍会表现出创新行为这个问题。本文基于趋利-避害框架理论,通过163个团队的489份数据,探讨了趋利型/避害型主动性人格影响员工不同类型创新行为的内在作用机制和边界条件。研究发现,趋利型主动性人格通过机会发掘动机间接影响增益型创新行为,而避害型主动性人格通过问题发掘动机间接影响避害型创新行为。团队内授权氛围不仅会调节趋利型主动人格与机会发掘动机的关系,还会进一步调节趋利型主动型人格通过机会发掘动机间接影响增益型创新行为的关系。同时,团队间竞争氛围可以调节避害型主动人格与问题发掘动机的关系,进一步调节避害型主动型人格通过问题发掘动机间接影响避害型创新行为的关系。本文在理论上有助于澄清主动性人格的实质及其对不同类型创新行为的影响效应和作用机制,为提高企业创新行为管理水平提供管理启示。

关键词：主动性人格创新行为趋利避害框架理论团队内授权氛围团队间竞争氛围

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Polymeric micelle nanocarriers in cancer research

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Frontiers of Chemical science and Engineering 2016年第3期10卷 348-359页

作者： Dae Hwan shin yu Tong Tam Glen s. Kwon school of Pharmacy University of Wisconsin Madison WI 53705 USA

Amphiphilic block copolymers （ABCs） assem- ble into a spherical nanoscopic supramolecular core/shell nanostructure termed a polymeric micelle that has been widely researched as an injectable nanocarrier for poorly water-soluble anticancer agents. The aim of this review article is to update progress in the field of drug delivery towards clinical trials, highlighting advances in polymeric micelles used for drug solubilization, reduced off-target toxicity and tumor targeting by the enhanced permeability and retention （EPR） effect. Polymeric micelles vary in stability in blood and drug release rate, and accordingly play different but key roles in drug delivery. For intravenous （IV） infusion, polymeric micelles that disas- semble in blood and rapidly release poorly water-soluble anticancer agent such as paclitaxel have been used for drug solubilization, safety and the distinct possibility of toxicity reduction relative to existing solubilizing agents, e.g., Cremophor EL. stable polymeric micelles are long- circulating in blood and reduce distribution to non-target tissue, lowering off-target toxicity. Further, they participate in the EPR effect in murine tumor models. In summary, polymeric micelles act as injectable nanocarriers for poorly water-soluble anticancer agents, achieving reduced toxi- city and targeting tumors by the EPR effect.

关键词： nanomedicine parenteral poly(ethylene glycol) poly(lactic acid) reformulation

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Magnetotelluric sounding in western Tibet

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Chinese science Bulletin 1997年第8期42卷 678-681页

作者： Ma, XB Kong, XR yu, s Institute of Geophysics Chinese Academy of Sciences Beijing China

THE magnetotelluric sounding(MT)profile from Gyirong to sangehu in western Tibet indi-cates that the surveyed region is divided into four tectonic units by Yarlung Zangbo sutureZone(s.Z.),Bangongco-Nujiang *** Lugu **... 详细信息

关键词： magnetotelluric sounding conductivity structure of lithosphere high conductivity layer Tibet Gandise unit Qiangtang unit.

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