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Nano-Micro Letters 2025年第3期17卷 455-500页

作者： Lei Fang Xiaoqi Lin Ruian Xu Lu Liu Yu Zhang Feng Tian jiao jiao Li Jiajia Xue Beijing Laboratory of Biomedical Materials Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China State Key Laboratory of Organic‑Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China School of Biomedical Engineering Faculty of Engineering and ITUniversity of Technology SydneySydneyNSW 2007Australia

The intricate hierarchical structure of musculoskeletal tissues,including bone and interface tissues,necessitates the use of complex scaffold designs and material structures to serve as tissue-engineered *** has led to growing interest in the development of gradient bone scaffolds with hierarchical structures mimicking the extracellular matrix of native tissues to achieve improved therapeutic *** on the anatomical characteristics of bone and interfacial tissues,this review provides a summary of current strategies used to design and fabricate biomimetic gradient scaffolds for repairing musculoskeletal tissues,specifically focusing on methods used to construct compositional and structural gradients within the *** latest applications of gradient scaffolds for the regeneration of bone,osteochondral,and tendon-to-bone interfaces are ***,the current progress of testing gradient scaffolds in physiologically relevant animal models of skeletal repair is discussed,as well as the challenges and prospects of moving these scaffolds into clinical application for treating musculoskeletal injuries.

关键词： Gradient scaffolds Musculoskeletal tissues Advanced manufacturing Biomaterials Tissue regeneration

乙酰丙酮铱Ir(acac)_(3)电子结构及光学性质的理论研究

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原子与分子物理学报 2025年第1期42卷 1-7页

作者：樊依佳蔚娇娇郭家成陈扬尹杜恭贺西北工业大学伦敦玛丽女王大学工程学院西安710129 西安邮电大学理学院西安710121

乙酰丙酮铱是一种由过渡金属Ir与乙酰丙酮酸(acetylcaetonato)有机部分组成的过渡金属有机配合物,它是一种重要的绿光磷光材料,同时其也是多种铱系发光材料的组成部分.采用密度泛函理论(DFT)对Ir(acac)_(3)单体及其二聚物的基态几何结... 详细信息

乙酰丙酮铱是一种由过渡金属Ir与乙酰丙酮酸(acetylcaetonato)有机部分组成的过渡金属有机配合物,它是一种重要的绿光磷光材料,同时其也是多种铱系发光材料的组成部分.采用密度泛函理论(DFT)对Ir(acac)_(3)单体及其二聚物的基态几何结构进行了优化,在此基础上考察了它们的振动和红外光谱,并使用CIS方法对它们的激发态性质进行了理论研究.计算得到的单体和二聚物的吸收光谱均在紫外波段,单体的主要吸收峰有260 nm,350 nm,414 nm,二聚物的主要吸收峰有299 nm,353 nm,401 nm.计算得到了二者在乙腈CH_(3)CN溶液中的吸收光谱,与它们气相情况的结果相比,溶剂极性的影响使得电子吸收谱发生蓝移.计算结果表明Horst Kunkely和Arnd Vogler所得光谱中既含有单体的特征光谱,又含有二聚体的特征光谱,证明实验溶液中同时存在乙酰丙酮铱的低聚物,并且二者的组分比能被合理推算.最后,对多聚体的形成机理作了简单讨论.

关键词： Ir(acac)_(3) 密度泛函理论(DFT) CIS 电子吸收光谱溶液效应

Statistical analysis on strain-rate effects during serrations in a Zr-based bulk metallic glass

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Journal of Iron and Steel Research International 2017年第4期24卷 455-461页

作者： Bo Yuan jiao-jiao Li Jun-wei Qiao College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024ShanxiChina Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024ShanxiChina

By means of statistical analysis,the deformation mechanisms taking place in elastic loading and plastic shearing stages during serrated flows on the stress-strain curves for bulk metallic glasses were studied *** serration number presented a linear increasing tendency with the decrease of applied strain rates due to the reduction of free *** excellent plastic deformation was illustrated from the influences of structure arrangement with activation *** using mean-field theory（MFT）,maximum elastic-energy density at different strain rates could be predicted by MFT besides maximum stress drops during *** results were helpful for understanding the serrated flow behavior or designing decent schemes to improve the plasticity of bulk metallic glasses at room temperature.

关键词： Bulk metallic glass Shear band Mean-field theory Serration

Soliton molecules and mixed solutions of the(2+1)-dimensional bidirectional Sawada-Kotera equation

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Communications in Theoretical Physics 2020年第2期72卷 9-16页

作者： jiao-jiao Dong Biao Li Manwai Yuen School of Mathematics and Statistics Ningbo UniversityNingbo 315211China Department of Mathematics and Information Technology The Education University of Hong KongLo Ping RoadTai PoNew TerritoriesHong KongChina

In this paper,we investigate some new interesting solution structures of the(2+1)-dimensional bidirectional Sawada–Kotera(bSK)*** obtain soliton molecules by introducing velocity *** the basis of soliton molecules,asymmetric solitons are obtained by changing the distance between two solitons of *** on the N-soliton solutions,several novel types of mixed solutions are generated,which include the mixed breather-soliton molecule solution by the module resonance of the wave number and partial velocity resonance,the mixed lump-soliton molecule solution obtained by partial velocity resonance and partial long wave limits,and the mixed solutions composed of soliton molecules(asymmetric solitons),lump waves,and breather *** plots are presented to clearly illustrate the dynamic features of these solutions.

关键词： (2+1)-dimensional bSK equation velocity resonance soliton molecules asymmetric solitons mixed solutions

Mechanical properties and friction behaviors of CNT/AlSi_(10)Mg composites produced by spark plasma sintering

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International Journal of Minerals,Metallurgy and Materials 2017年第5期24卷 584-593页

作者： Lin-zhi Wang Ying Liu jiao-jiao Wu Xi Zhang Chongqing Key Laboratory of Additive Manufacturing Technology and Systems Chongqing Institute of Green and Intelligent TechnologyChinese Academy of Sciences College of Material Science and Engineering Sichuan University College of Material Science and Engineering Southwest Jiaotong university

The mechanical properties and friction behaviors of CNT/AlSi10Mg composites produced by spark plasma sintering (SPS) were investigated. The results showed that the densities of the sintered composites gradually increased with increasing sintering temperature and that the highest microhardness and compressive strength were achieved in the specimen sintered at 450A degrees C. CNTs dispersed uniformly in the Al-Si10Mg matrix when the addition of CNTs was less than 1.5wt%. However, when the addition of CNTs exceeded 1.5wt%, the aggregation of CNTs was clearly observed. Moreover, the mechanical properties (including the densities, compressive strength, and microhardness) of the composites changed with CNT content and reached a maximum value when the CNT content was 1.5wt%. Meanwhile, the minimum average friction coefficient and wear rate of the CNT/AlSi10Mg composites were obtained with 1.0wt% CNTs.

关键词： metal matrix composites carbon nanotubes (CNTs) aluminum silicon magnesium alloys spark plasma sintering mechanical properties friction

Impact of slope farmland use change on ecosystem services value in China,2000-2020

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Journal of Mountain Science 2023年第3期20卷 821-833页

作者： ZENG Jie BIAN jiao-jiao CHEN Wan-xu Department of Geography School of Geography and Information EngineeringChina University of GeosciencesWuhan430074China State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijing 100875China

Slope farmland is an important component of farmland resources in *** utilization and change of slope farmland have significant effects on ecosystems,and understanding the impact of slope farmland change on ecosystem services(ESs)is critical for effective land utilization and ecosystem *** study aims to analyze slope farmland changes in China between 2000 and 2020 and quantify the impact of these changes on ESs by the use of a land use dynamic attitude study,and an ecosystem services value(ESV)*** show that the area of slope farmland in China was mainly concentrated on slopes of 2°-6°,and exhibited a downward trend between 2000 and *** were significant differences in the spatial distribution of the farmland,which was mainly located in the Taihang,Qinling,Wushan,and Xuefeng *** increased by$179.235 million due to the conversion between slope farmland and forest,grassland,and construction land from ***,from 2010 to 2020,ESV decreased by$2613.919 million due to the conversion of forest and grassland to slope farmland as well as the conversion of slope farmland to construction land.

关键词： Slope farmland change Revised benefit transfermethod Ecosystemservicesvalue Ecosystem services management Slope farmland utilization China

Pricing Vulnerable Options with Correlated Credit Risk Under Jump-diffusion Processes When Corporate Liabilities Are Random

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Acta Mathematicae Applicatae Sinica 2019年第2期35卷 305-318页

作者： Qing ZHOU jiao-jiao YANG Wei-xing WU School of Science Beijing University of Posts and Telecommunications School of Banking and Finance University of International Business and Economics

In this paper, we consider an improved model of pricing vulnerable options with credit risk. We assume that the vulnerable European options not only face default risk, but also face the rare shocks of the underlying assets and the counterparty assets. The dynamics of two correlated assets are modeled as a class of jump diffusion processes. Furthermore, we assume that the dynamic of the corporate liability is a geometric Brownian motion that is related to the underlying asset and the counterparty asset. Under this new framework,we give an explicit pricing formula of the vulnerable European options.

关键词： vulnerable option default credit risk pricing jump-diffusion

Diagnosis of an actively bleeding brachial artery hematoma by contrast-enhanced ultrasound:A case report

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World Journal of Clinical Cases 2020年第17期8卷 3835-3840页

作者： jiao-jiao Ma Bo Zhang Department of Ultrasound China-Japan Friendship HospitalBeijing 100029China

BACKGROUND Active bleeding due to arterial injury following the acupuncture can sometimes represent a life-threatening *** few reports of an actively bleeding hematoma diagnosed by contrast-enhanced ultrasound,which enables the depiction of vascular,have been *** SUMMARY Here,we report the case of a 75-year-old woman,who presented with sudden swelling,ecchymosis,and pain in the upper left *** underwent an acupuncture treatment of traditional Chinese medicine followed by a deep shoulder massage 2 d before admission to hospital.A few hours after the massage,her left upper arm was red,swollen and progressively *** showed a large hematoma(11.2 cm×3.5 cm×3.4 cm)beside the left brachial *** Doppler ultrasound revealed that blood flow signals of the arteries branched into the *** contrast-enhanced ultrasound showed microbubbles from the brachial artery passing into the hematoma,diffused within the hematoma with the local surge of red blood cells,and disappearing after approximately 17 *** microbubbles were likely due to bleeding from the *** pressure bandaging treatment,the hematoma became smaller(3.1 cm×1.7 cm)and organized according to ultrasonography performed 20 d *** This case highlights the ultimate importance of contrast-enhanced ultrasound for the diagnosis of an actively bleeding hematoma.

关键词： Acupuncture Ultrasonography Bleeding Contusion Case report

Effects of mask wearing duration and relative humidity on thermal perception in the summer outdoor built environment

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Building Simulation 2023年第9期16卷 1601-1616页

作者： Rong Hu Jianlin Liu Yongxin Xie jiao jiao Zhaosong Fang Borong Lin College of Environmental Science and Engineering Donghua UniversityShanghaiChina Department of Building Science School of ArchitectureTsinghua UniversityBeijingChina School of Civil Engineering Guangzhou UniversityGuangzhouChina Department of Building Environment and Energy Engineering The Hong Kong Polytechnic UniversityKowloonHong KongChina

During the pandemic,face masks are one of the most significant self-protection necessities,but they also cause heat *** using the ERA5(ECMWF Reanalysis 5th Generation)database and the local weather bureau data,the effect of mask wearing on outdoor thermal sensation has been investigated by a survey conducted in the hot summer and cold winter region of eastern China in the summer of *** show that wearing a face mask for a longer period result in a higher level of discomfort,and the primary source of discomfort is hot and stuffy *** effect of relative humidity is crucial for mask wearers in warm-biased thermal environments,as mean thermal sensation vote(TSV)peaks when environmental relative humidity reaches the range of 70%to 80%and decreases after this range due to the evaporation within the microclimate created by a face ***,prolonged mask wearing increases participants’hot feelings,especially in warm ***,participants wearing face masks for less than 30 min feel hot at a physiological equivalent temperature(PET)value of 34.4℃,but those who wear them for over 60 min express hot feelings even at a PET value of 24.7℃.The participants who wear a face mask while walking slowly outdoors have similar thermal sensations to those who do not wear a mask,but are in a higher activity *** findings demonstrate that mask wearing has a crucial impact on outdoor thermal comfort assessment in a warm-biased outdoor thermal environment.

关键词： outdoor thermal comfort disposable medical masks mask wearing duration relative humidity physiological equivalent temperature(PET)

The construction of shale rock physics model and brittleness prediction for high-porosity shale gas-bearing reservoir

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Petroleum Science 2020年第3期17卷 658-670页

作者： Xin-Peng Pan Guang-Zhi Zhang jiao-jiao Chen School of Geoscience and Info-Physics Central South UniversityChangsha 410082HunanChina School of Geoscience China University of Petroleum(East China)Qingdao 266580ShandongChina

Due to the huge differences between the unconventional shale and conventional sand reservoirs in many aspects such as the types and the characteristics of minerals,matrix pores and fluids,the construction of shale rock physics model is significant for the exploration and development of shale *** make a better characterization of shale gas-bearing reservoirs,we first propose a new but more suitable rock physics model to characterize the *** then use a well A to demonstrate the feasibility and reliability of the proposed rock physics model of shale gas-bearing ***,we propose a new brittleness indicator for the high-porosity and organic-rich shale gas-bearing *** on the parameter analysis using the constructed rock physics model,we finally compare the new brittleness indicator with the commonly used Young’s modulus in the content of quartz and organic matter,the matrix porosity,and the types of filled *** also propose a new shale brittleness index by integrating the proposed new brittleness indicator and the Poisson’s *** on real data sets demonstrate that the new brittleness indicator and index are more sensitive than the commonly used Young’s modulus and brittleness index for the high-porosity and high-brittleness shale gas-bearing reservoirs.

关键词： Shale gas Rock physics model Brittleness prediction