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Bifunctional Liquid Metals Allow Electrical Insulating Phase Change Materials to Dual-Mode Thermal Manage the Li-Ion Batteries

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Nano-Micro Letters 2022年第12期14卷 224-238页

作者： cong Guo Lu He Yihang Yao Weizhi Lin Yongzheng Zhang Qin Zhang Kai Wu Qiang Fu College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065People’s Republic of China Department of Polymer Science and Engineering School of Chemical EngineeringNanjing University of Science and TechnologyNanjing 210094People’s Republic of China

Phase change materials(PCMs)are expected to achieve dual-mode thermal management for heating and cooling Li-ion batteries(LIBs)according to real-time thermal conditions,guaranteeing the reliable operation of LIBs in both cold and hot ***,we report a liquid metal(LM)modified polyethylene glycol/LM/boron nitride PCM,capable of dual-mode thermal managing the LIBs through photothermal effect and passive thermal *** geometrical conformation and thermal pathways fabricated through ice-template strategy are conformable to the LIB’s structure and heat-conduction ***,soft and deformable LMs are modified on the boron nitride surface,serving as thermal bridges to reduce the contact thermal resistance among adjacent fillers to realize high thermal conductivity of 8.8 and 7.6 W m^(−1) K^(−1) in the vertical and in-plane directions,*** addition,LM with excellent photothermal performance provides the PCM with efficient battery heating capability if employing a controllable lighting *** a proof-of-concept,this PCM is manifested to heat battery to an appropriate temperature range in a cold environment and lower the working temperature of the LIBs by more than 10℃ at high charging/discharging rate,opening opportunities for LIBs with durable working performance and evitable risk of thermal runaway.

关键词： Phase change materials Liquid metal Thermal conductivity Photothermal conversion Battery thermal management

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Role of reactive oxygen species in epithelial-mesenchymal transition and apoptosis of human lens epithelial cells

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International Journal of Ophthalmology(English edition) 2023年第12期16卷 1935-1941页

作者： Rui-Hua Jing cong-Hui Hu Tian-Tian Qi Bo Ma Department of Ophthalmology the Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710004Shaanxi ProvinceChina Department of Ophthalmology the First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061Shaanxi ProvinceChina

AIM:To investigate the role of reactive oxygen species(ROS)in epithelial–mesenchymal transition(EMT)and apoptosis of human lens epithelial cells(HLECs).METHODS:Flow cytometry was used to assess ROS production after transforming growth factorβ2(TGF-β2)*** of HLECs after H_(2)O_(2) and TGF-β2 interference with or without ROS scavenger N-acetylcysteine(NAC)were assessed by flow *** corresponding protein expression levels of the EMT markerα-smooth muscle actin(α-SMA),the extracellular matrix(ECM),marker fibronectin(Fn),and apoptosis-associated proteins were detected by using Western blotting in the presence of an ROS scavenger(NAC).Wound-healing and Transwell assays were used to assess the migration capability of ***:TGF-β2 stimulates ROS production within 8h in ***,TGF-β2 induced HLECs cell apoptosis,EMT/ECM synthesis protein markers expression,and pro-apoptotic proteins production;nonetheless,NAC treatment prevented these ***,TGF-β2 promoted HLECs cell migration,whereas NAC inhibited cell *** further determined that although ROS initiated apoptosis,it only induced the accumulation of the EMT markerα-SMA protein,but not COL-1 or ***:ROS contribute to TGF-β2-induced EMT/ECM synthesis and cell apoptosis of HLECs;however,ROS alone are not sufficient for EMT/ECM synthesis.

关键词： human lens epithelial cells epithelial-mesenchymal transition transforming growth factorβ2 reactive oxygen species apoptosis

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基于改进3D卷积神经网络的疼痛检测

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计算机系统应用 2024年第2期33卷 291-298页

作者：黄伟聪周卓沂李雄彬梁艳华南师范大学软件学院佛山528225

在临床实践中,精确评估疼痛对于疼痛管理和诊断至关重要.但传统的评估方法主观性高且依赖医生经验,迫切需要更可靠客观的替代方法.利用深度学习的方法实现基于面部表情的疼痛检测研究近年已取得显著进展,但复杂的结构和高计算成本制约... 详细信息

在临床实践中,精确评估疼痛对于疼痛管理和诊断至关重要.但传统的评估方法主观性高且依赖医生经验,迫切需要更可靠客观的替代方法.利用深度学习的方法实现基于面部表情的疼痛检测研究近年已取得显著进展,但复杂的结构和高计算成本制约了其实际应用.因此,本文提出了一个改进的3D卷积神经网络,采用轻量级的3D卷积神经网络L3D作为骨干网络,并结合改进的SE注意力机制,把多个不同尺度的特征进行融合,捕捉疼痛序列中具有较强辨别能力的时空特征.在UNBC-McMaster和BioVid数据集上进行评估,与最新方法相比,该方法在疼痛检测性能以及计算复杂度上取得了优势.

关键词：疼痛检测疼痛表情 3D卷积神经网络轻量级注意力机制特征融合

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Response of Northern Hemispheric Air Temperature to Arctic Sea Ice Decline

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Atmospheric and Oceanic Science Letters 2013年第3期6卷 123-127页

作者： YU Bo XU Zhong-Feng FU cong-Bin Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of Sciences University of Chinese Academy of Sciences Beijing Municipal Meteorological Observatory School of Atmospheric Science Nanjing University

Two numerical experiments were performed by using the Community Atmosphere Model version 3 （CAM3） with different sea ice datasets to assess the con- tribution of the decline of Arctic sea ice to warming in the Northern Hemisphere. One observed sea ice cover data; experiment was driven by for the other one, the authors used the sea ice data of the 4xCO2 scenario simulated by the fourth-generation European Centre Hamburg atmos- pheric general circulation Model of Istituto Nazionale di Geofisica e Vulcanologia, Italy （1NGV ECHAM4）. The comparison of the two experiments indicates that the de- cline of the Arctic sea ice leads to a dramatic wanning over the high latitudes of the Northern Hemisphere, char- acterized by a maximum warming of more than 26~C over the Arctic region. The significant warming is closely re- lated to the enhanced atmospheric heat source. A 40-60 W m-2 increase in the apparent heat source was simulated in winter due to the decline of Arctic sea ice. In contrast, no significant change was found in the atmospheric ap- parent heat source in summer. As a result, the summer temperature change induced by the decline of Arctic sea ice appears to be weak. This study suggests that accurate sea ice cover data is crucial for future climate projection of air temperature in high latitudes.

关键词： Arctic sea ice melting temperature changes heat source changes

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Optimal subreflector position determination of shaped dual-reflector antennas based on the parameters iteration approach

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Research in Astronomy and Astrophysics 2019年第4期19卷 151-160页

作者： Bin-Bin Xiang cong-Si Wang Pei-Yuan Lian Na Wang You Ban Key Laboratory of Electronic Equipment Structure Design of Ministry of Education School of Mechano-Electronic Engineering Xidian University xinjiang Astronomical Observatory Chinese Academy of Sciences

A new method based on the parameters iteration technique has been developed to determine the optimal subreflector position for shaped Cassegrain antennas, that are distorted by gravity, to improve their electromagnetic(EM) performance. Both the features of shaped surface and the relationship between optical path difference(OPD) and far field beam pattern are employed. By describing the shaped dualreflector surface as a standard discrete parabola set, we can utilize the optical features of the standard Cassegrain system in the classical OPD relationship. Then, the actual far field beam pattern is expressed as the synthesis of ideal beam and error beam by decomposing subreflector adjustment parameters using a mechanical-electromagnetic-field-coupling-model(MEFCM). Furthermore, a numerical method for determining optimal subreflector position is presented. The proposed method is based on the iteration technique of subreflector adjustment parameters, and the optimal far field pattern is used for the iteration. The numerical solution of optimal adjustment parameters can be obtained rapidly. Results for a 25 m shaped Cassegrain antenna demonstrate that the adjustment of the subreflector to the optimal position as determined by the proposed method can improve the EM performance effectively.

关键词： methods:analytical methods:numerical telescope techniques:radar astronomy

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环境激励下结构模态辨识的识别概率直方图方法研究

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振动工程学报 2016年第4期29卷 561-567页

作者：陈太聪李盈盈苏成马海涛华南理工大学土木与交通学院亚热带建筑科学国家重点实验室广东广州510641

在环境激励下辨识结构模态时,系统阶次作为关键计算参数不易准确判定,通常采用基于假设系统阶次的稳定图方法来辅助进行,但其中稳定轴的判定较为主观,容易遗漏真实模态及引入虚假模态。基于数据挖掘技术,提出识别概率直方图(Identificat... 详细信息

在环境激励下辨识结构模态时,系统阶次作为关键计算参数不易准确判定,通常采用基于假设系统阶次的稳定图方法来辅助进行,但其中稳定轴的判定较为主观,容易遗漏真实模态及引入虚假模态。基于数据挖掘技术,提出识别概率直方图(Identification-probability Histogram,IpHist)的新方法,对不同假设系统阶次下通过随机子空间识别得到的多组备选模态,根据频率容差和模态置信度容差准则进行一致性聚类,继而计算群组聚类结果的识别概率,并绘制相应的识别概率直方图,最后选取识别概率大的结果作为结构模态结果。通过IASC-ASCE结构健康监测工作组提供的4层框架Benchmark模型算例,阐述了所提IpHist方法在环境激励下辨识结构模态的有效性,显示了方法较强的抗噪能力。

关键词：模态辨识随机子空间稳定图识别概率直方图

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Synthesis of monodispersed Fe3O4@C core/shell nanoparticles

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Science China Chemistry 2016年第4期59卷 394-397页

作者： Rui Liu Shu Mi Yuanyuan Li cong Chen Yong Xie Qiang Chen Ziyu Chen Key Laboratory of Micro-nano Measurement-Manipulation and Physics(Ministry of Education) Department of PhysicsBeihang UniversityBeijing 100191China

We report a facile method to synthesize dispersed Fe304@C nanoparticles （NPs）. Fe304 NPs were firstly prepared via the high temperature diol thermal decomposition method. Fe304@C NPs were fabricated using glucose as a carbon source by hydro- thermal process. The obtained products were characterized by X-ray diffraction （XRD）, transmission electron microscopy （TEM）, vibrating sample magnetometer （VSM） and Raman spectra. The results indicate that the original shapes and magnetic property of Fe304 NPs can be well preserved. The magnetic particles are well dispersed in the carbon matrix. This strategy would provide an efficient approach for existing applications in Li-ion batteries and drug delivery. Meanwhile, it offers the raw materials to assemble future functional nanometer and micrometer superstructures.

关键词： Fe304@ C monodispersity nanoparticles

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Changes of paired-pulse evoked responses during the development of epileptic activity in the hippocampus

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第9期12卷 704-711页

作者： Zhou-yan FENG Xiao-jing ZHENG cong TIAN Yang WANG Hao-yu xinG Ministry of Education Key Lab of Biomedical Engineering College of Biomedical Engineering & Instrument ScienceZhejiang UniversityHangzhou 310027China

Dysfunction of inhibitory synaptic transmission can destroy the balance between excitatory and inhibitory synaptic inputs in neurons,thereby inducing epileptic *** aim of the paper is to investigate the effects of successive excitatory inputs on the epileptic activity induced in the absence of ***-pulse orthodromic and antidromic stimulations were used to test the changes in the evoked responses in the ***(PTX),γ-aminobutyric acid(GABA) type A(GABA A) receptor antagonist,was added to block the inhibitory synaptic transmission and to establish the epileptic *** evoked population spike(PS) was recorded in the CA1 region of the *** results showed that the application of PTX induced a biphasic change in the paired-pulse ratio of PS amplitude.A short latency increase of the second PS(PS2) was later followed by a reappearance of PS2 *** type of depression was observed in both orthodromic and antidromic paired-pulse responses,whereas the GABAergic PS2 depression [called paired-pulse depression(PPD)] during baseline recordings only appeared in orthodromic-evoked *** addition,the depression duration at approximately 100 ms was consistent with a relative silent period observed within spontaneous burst discharges induced by prolonged application of *** conclusion,the neurons may ignore the excitatory inputs and intrinsically generate bursts during epileptic *** depolarization block could be the mechanisms underlying the PPD in the absence of GABA A *** distinct neuronal responses to stimulations during different epileptic stages may implicate the different antiepileptic effects of electrical stimulation.

关键词： Epilepsy Paired-pulse depression γ-Aminobutyric acid(GABA) Picrotoxin(PTX) CA1 region In-vivo

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Fluid inclusions in whiteschist in the ultrahigh-pressure metamorphic belt of Dabie Shan,China

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Chinese Science Bulletin 2002年第12期47卷 1028-1032页

作者： Hongrui Fan Jingbo Liu Jinghui Guo Kai Ye Bolin cong Chinese Acad Sci Inst Geol & Geophys Beijing 100029 Peoples R China

Hualiangting whiteschist in the Dabie Shan ultrahigh-pressure eclogite complex is a specific Mg-Al-rich metamorphic rock. Its protolith was a felsic dyke, which suffered replacement by high-pressure fluids during ec-logite-facies metamorphism. Based on fluid inclusion results in whiteschist, primary high-pressure fluids are CO2-bearing aqueous solutions. Those prove that there exists CO2-H2O fluid during the ultrahigh-pressure metamorphism. Pseu-dosecondary H2O inclusions were trapped during ultra-high-pressure exhumation, whereas secondary H2O inclusions were related to the latest evolutionary stage of the ultrahigh-pressure exhumation.

关键词： fluid inclusion whiteschist ultrahigh-pressure Dabie Shan.

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Growth and magnetic properties of single crystalline Ni nanowire arrays prepared by pulse DC electrodeposition

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Science China(Physics,Mechanics & Astronomy) 2011年第7期54卷 1244-1248页

作者： ZHANG Jun JIN Yaxin WANG HanBin YE cong TONG WeiMing WANG Hao Foculty of Physics and Electronic Technology Hubei University Wuhan 430062 China

Highly textured Ni nanowire arrays were fabricated into anodic aluminum oxide （AAO） templates by pulse DC electrodeposi- tion. The applied voltage and pH value of electrolytes were found strongly affecting the microstrucmre and magnetic proper ties of Ni nanowire arrays. Low applied potential and pH value both prefer to form polycrystalline fcc Ni nanowires. Increas- ing the applied potential or pH value favors the Ni [220] texture and even eventually forms the [220] oriented single crystal Ni wires, while exorbitant potential and pH value will conversely weaken the texture of nanowires. The magnetic properties of Ni wires are closely related to the microstructure of Ni nanowire arrays and large coercivities more than 1000 Oe were achieved at single crystalline Ni nanowire arrays. The mechanisms for the effect of applied potential and pH value on the grain size, tex- ture and magnetic properties of Ni nanowire arrays have been discussed.

关键词： nanowire arrays applied potential pH value microstructure magnetic properties electrodeposition

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