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Insight into vertical piezoelectric characteristics regulated thermal transport in van der Waals two-dimensional materials

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Rare Metals 2024年第2期43卷 770-779页

作者： dong-hai Wei E Zhou Jin-Yuan Xu Hui-Min Wang Chen Shen Hong-Bin Zhang Zhen-Zhen Qin Guang-Zhao Qin State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha410082China Hunan Key Laboratory for Micro-Nano Energy Materials and Device and School of Physics and Optoelectronics Xiangtan UniversityXiangtan411105China Institute of Materials Science Technical University of DarmstadtAlarich-Weiss-Str.264287DarmstadtGermany School of Physics and Microelectronics Zhengzhou UniversityZhengzhou450001China

The urgent demand of extreme(ultra-high/low)thermal conductivity materials is triggered by the high-power device,where exploring the theories and mechanisms of regulating thermal transport properties plays a key ***,we elaborately investigate the effect of vertical(out-of-plane)piezoelectric characteristics on thermal transport,which is historically *** different stacking-order(AA and AB)bilayer boron nitride(Bi-BN)in two-dimensional(2D)materials are selected as study *** performing state-of-the-art first-principles calculations,it is found that the polarization charge along the out-of-plane orientation ascends significantly with the increasing piezoelectric response in AB stacked Bi-BN(Bi-BN-AB)followed by the enhanced interlayer B–N atomic ***,the amplitude of phonon anharmonicity in Bi-BN-AB increases larger than that in the AA stacked Bi-BN(Bi-BN-AA),resulting in the dramatic weakening of the thermal conductivity by 20.34%under 18%*** research reveals the significant role of the vertical(out-of-plane)piezoelectric characteristic in regulating thermal transport and provides new insight into accurately exploring the thermal transport performance of 2D van der Waals materials.

关键词： Thermal conductivity Piezoelectric effect 2D materials Bilayer BN Strain engineering

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一种改进的自动化高速公路交通流速度控制器设计

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控制理论与应用 2009年第1期26卷 103-106页

作者：杨旭华董颖颖杨海东王万良浙江工业大学信息工程学院浙江杭州310032 浙江大学工业控制技术国家重点实验室浙江杭州310027

在自动化高速公路的环境下,针对一种基于非线性积分器Backstepping方法的交通流密度控制器,本文提出一种改进的交通流速度控制器设计方法,选取交通流速度为被控变量,并采用Backstepping方法进行控制器的设计,保证使每个路段的交通流速... 详细信息

在自动化高速公路的环境下,针对一种基于非线性积分器Backstepping方法的交通流密度控制器,本文提出一种改进的交通流速度控制器设计方法,选取交通流速度为被控变量,并采用Backstepping方法进行控制器的设计,保证使每个路段的交通流速度以指数形式快速收敛到期望值.与已有的方法相比较,该控制器极大地提高了算法效率,而且无需矩阵的逆运算,可以自动满足系统的可控性条件.仿真结果显示该控制器可以有效地减少道路拥塞,有助于在拥堵的高速公路上实现平滑的交通流.

关键词： Backstepping 自动化高速公路速度控制器指数收敛

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Mesenteric adipose tissue B lymphocytes promote intestinal injury in severe acute pancreatitis by mediating enteric pyroptosis

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Hepatobiliary & Pancreatic Diseases International 2024年第3期23卷 300-309页

作者： Qing Huang Jia-Wen Liu hai-Bin dong Zheng-Jie Wei Jin-Zhe Liu Yu-Tang Ren Xuan Jiang Bo Jiang Department of Gastroenterology Beijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijing 102218China

Background:Visceral adipose tissue(VAT)has been linked to the severe acute pancreatitis(SAP)prognosis,although the underlying mechanism remains *** has been reported that pyroptosis worsens *** present study aimed to verify whether mesenteric adipose tissue(MAT,a component of VAT)can cause secondary intestinal injury through the pyroptotic ***:Thirty-six male Sprague Dawley(SD)rats were divided into six different *** rats were randomly divided into the SAP and control *** monitored the changes of MAT and B lymphocytes infiltration in MAT of SAP *** SAP rats were injected with MAT B lymphocytes or phosphate buffer solution(PBS).The remaining twelve SAP rats were first injected with MAT B lymphocytes,and then with MCC950(NLRP3 inhibitor)or *** collected blood and tissue samples from pancreas,gut and MAT for ***:Compared to the control rats,the SAP group showed inflammation in MAT,including higher expression of tumor necrosis factor(TNF-α)and interleukin-6(IL-6),lower expression of IL-10,and histological *** cytometry analysis revealed B lymphocytes infiltration in MAT but not T lymphocytes and *** SAP rats also exhibited intestinal injury,characterized by lower expression of zonula occludens-1(ZO-1)and occludin,higher levels of lipopolysaccharide and diamine oxidase,and pathological *** expression of NLRP3 and n-GSDMD,which are responsible for pyroptosis,was increased in the intestine of SAP *** injection of MAT B lymphocytes into SAP rats exacerbated the inflammation in *** upregulation of pyroptosis reduced tight junction in the intestine,which contributed to the SAP progression,including higher inflammatory indicators and worse histological *** administration of MCC950 to SAP+MAT B rats downregulated pyroptosis,which subsequently improved the intestinal barrier and ameliorated inflammatory response of ***:In SAP,MAT B lymphocytes aggravated local

关键词： Acute pancreatitis Mesenteric adipose tissue B lymphocyte Intestinal barrier Pyroptosis

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基于改进Bayesian-MCMC的突发水污染事件预测模型参数率定方法

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控制与决策 2018年第4期33卷 679-686页

作者：杨海东刘碧玉黄建华福州大学经济与管理学院福州350116

预测模型是科学制定应急处置措施的基础.为快速准确地构建突发水污染事件预测模型,将预测模型参数的率定问题视为贝叶斯估计问题,并根据有限差分方法和贝叶斯推理得到参数的后验概率密度函数,再通过改进的Metropolis-Hastings抽样方法... 详细信息

预测模型是科学制定应急处置措施的基础.为快速准确地构建突发水污染事件预测模型,将预测模型参数的率定问题视为贝叶斯估计问题,并根据有限差分方法和贝叶斯推理得到参数的后验概率密度函数,再通过改进的Metropolis-Hastings抽样方法得到较为合理的参数值.以发生在某明渠段的突发水污染事件为例,分析讨论等容量控制非均匀流和非等容量控制非均匀流两种情景下不同观测噪声对参数率定值的影响,并与由贝叶斯-马尔科夫链蒙特卡罗方法得到的参数值和真实值进行对比.结果表明:改进Bayesian-MCMC方法在计算精度、适用性和抗噪声等方面优于贝叶斯-马尔科夫链蒙特卡罗方法,能较好地率定模型参数,并为构建突发水污染事件预测模型提供了新思路.

关键词：参数率定预测模型贝叶斯马尔可夫链蒙特卡罗突发水污染事件

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Boosting ammonia production in electrocatalytic NO_(x)reduction on a robust Fe/FeMoO_(4)catalyst

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Nano Research 2024年第7期17卷 5801-5806页

作者： dong-Xue Liu Xin Deng Yong-Fu Zhu Zhe Meng Xue-Feng Sun Miao-Miao Shi hai-Xia Zhong Jun-Min Yan Key Laboratory of Automobile Materials Ministry of EducationSchool of Materials Science and EngineeringJilin UniversityChangchun 130022China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

Electrocatalytic reduction of nitrate(NO_(3)^(−))and nitride(NO_(2)^(−))to ammonia(NH3)is of wide interest as a promising alternative to the energy-intensive Haber-Bosch route for mitigating the vast energy consumption and the accompanied carbon dioxide emission,as well as benefiting for the relevant sewage ***,exploring an efficient and low-cost catalyst with high atomic utilization that can effectively facilitate the slow multi-electron transfer process remains a grand ***,we present an efficient hydrogenation of NO_(3)^(−)/NO_(2)^(−)species to NH3 in both alkaline and neutral environments over the Fe_(2)(MoO_(4))_(3)derived hybrid electrocatalyst with the metallic Fe site on FeMoO_(4)(Fe/FeMoO_(4)).The Mo ingredient can play a synergistically positive role in further promoting the NH_(3) production on *** a result,Fe/FeMoO_(4)behaves well in the electrochemical NH_(3) generation from NO_(2)^(−)with a maximum NH_(3) Faradaic efficiency(FE)of 96.53%and 87.68%in alkaline and neutral electrolyte,corresponding to the NH_(3) yield rate of 640.68 and 302.56 mg·h^(−1)·mg_(cat.)^(−1),respectively,which outperforms the Fe and Mo counterpart and other similar catalyst,showing the robust catalytic capacity of each active site.

关键词： ammonia synthesis NO_(x)reduction synergistic effect alkaline/neutral electrolyte

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基于目标进化的aiNet聚类算法

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华南理工大学学报（自然科学版） 2009年第4期37卷 1-6页

作者：郭建华邓飞其杨海东华南理工大学自动化科学与工程学院广东广州510640

针对aiNet算法中没有定义目标函数、记忆网络动态无规律变化等问题,提出了基于目标进化的人工免疫网络聚类新算法,将人工免疫网络压缩聚类抽象为多目标规划问题,定义了记忆网络的整体进化目标,并采用疫苗注射策略提升免疫学习质量.中心... 详细信息

针对aiNet算法中没有定义目标函数、记忆网络动态无规律变化等问题,提出了基于目标进化的人工免疫网络聚类新算法,将人工免疫网络压缩聚类抽象为多目标规划问题,定义了记忆网络的整体进化目标,并采用疫苗注射策略提升免疫学习质量.中心聚类和非线性聚类的仿真结果表明:新算法的聚类质量、压缩质量、参数敏感性等优于原aiNet算法;新算法的平均类散布矩阵迹为4.1420,低于原aiNet的4.2575;样本压缩率比原aiNet算法高8.42%;聚类正确率对压缩阈值的敏感性比原aiNet算法弱.

关键词：人工免疫网络目标进化聚类分析数据压缩

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Boosted photocatalytic removal of NO using direct Z-scheme UiO-66-NH_(2)/Bi_(2)MoO_(6) nanoflowers heterojunction:mechanism insight and humidity effect

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Rare Metals 2024年第8期43卷 3758-3770页

作者： Jiang-Yu-Shan Liang hai-Tao Ren Abdelkader Labidi Qiu-Hui Zhu Qi-Bing dong Ahmed A.Allam Ahmed Rady Chuan-Yi Wang School of Environmental Science and Engineering Shaanxi University of Science and TechnologyXi'an 710021China Zoology Department Faculty of ScienceBeni-Suef UniversityBeni-Suef 6251lEgypt Department of Zoology College of ScienceKing Saud University11451 RiyadhSaudi Arabia

In practical applications,relative humidity in the air is a key factor affecting the photocatalytic removal of NO,which is often overlooked in previous ***,we developed a direct Z-scheme UiO-66-NH_(2)/Bi_(2)MoO_(6)heterojunction with a nanoflower-like structure to systematically investigate the effect of relative humidity on photocatalytic removal of *** optimized heterojunction for the removal efficiency of NO was 71.6%at1.07 mg·m^(-3)NO concentration(relative humidity=10%),and the generation of NO_(2) was only 1.1%.Interestingly,with the increase in relative humidity,it showed a higher inhibition effect on NO_(2),while the removal of NO decreased slightly(8%),which might be attributed to the affinity effect of NO_(2) with water molecules and the competitive adsorption of H_(2)O and NO on the surface of the heterojunction ***,the reaction pathways of NO removal at the developed heterojunctions were revealed by in situ DRIFTS *** work provides a novel vision for the development of direct Z-scheme heterojunction photocatalysts to effectively remove NO and inhibit the formation of toxic intermediate NO_(2) under different humidities.

关键词： NO removal Relative humidity Direct Z-scheme Bismuth molybdate Visible-light photocatalysis

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TCERG1L hypermethylation is a risk factor of diabetic retinopathy in Chinese children with type 1 diabetes

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International Journal of Ophthalmology(English edition) 2024年第3期17卷 537-544页

作者： Yu Qian Ying Xiao Qiu-Rong Lin Zhao-Yu Xiang Li-Pu Cui Jia-Qi Sun Si-Cong Li Xin-Ran Qin hai-dong Zou Chen-Hao yang Pei-Yao Jin Department of Ophthalmology Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai First People’s HospitalShanghai 200080China Shanghai Eye Diseases Prevention&Treatment Center Shanghai Eye HospitalShanghai 200040China National Clinical Research Center for Eye Diseases Shanghai Clinical Research Center for Eye DiseasesShanghai Key Clinical SpecialtyShanghai Key Laboratory of Ocular Fundus DiseasesShanghai Engineering Center for Visual Science and PhotomedicineShanghai Engineering Center for Precise Diagnosis and Treatment of Eye DiseasesShanghai 200080China Department of Ophthalmology Children’s Hospital of Fudan UniversityShanghai 201102China

●AIM:To identify the differential methylation sites(DMS)and their according genes associated with diabetic retinopathy(DR)development in type 1 diabetes(T1DM)children.●METHODS:This study consists of two surveys.A total of 40 T1DM children was included in the first *** no participant has DR,retina thinning was used as a surrogate indicator for *** lowest 25%participants with the thinnest macular retinal thickness were included into the case group,and the others were *** DNA methylation status was assessed by the Illumina methylation 850K array BeadChip assay,and compared between the case and control *** DMS with a potential role in diabetes were *** second survey included 27 T1DM children,among which four had *** methylation patterns of the four DMS identified by 850K were compared between participants with and without DR by pyrosequencing.●RESULTS:In the first survey,the 850K array revealed 751 sites significantly and differentially methylated in the case group comparing with the controls(|Δβ|>0.1 and Adj.P0.05)between participants with and without DR.●CONCLUSION:The hypermethylation of the TCERG1L gene is a risk factor for DR development in Chinese children with T1DM.

关键词： DNA methylation 850K array pyrosequencing diabetic retinopathy type 1 diabetes children

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一种新型电机保护装置设计

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合肥工业大学学报（自然科学版） 2015年第9期38卷 1202-1204,1286页

作者：邵伟杨海东安徽中烟工业有限责任公司阜阳卷烟厂安徽阜阳236000 合肥工业大学机械与汽车工程学院安徽合肥230009

针对传统热继电器在电机运行保护时存在的灵敏度低、调整误差大、功耗大、耗材多、性能指标落后等缺陷,文章设计一种新型电机过载保护装置,该装置利用一个磁环感应线圈采集电机的某一相电流信号,同时采用线路板以干触点接入交流接触器... 详细信息

针对传统热继电器在电机运行保护时存在的灵敏度低、调整误差大、功耗大、耗材多、性能指标落后等缺陷,文章设计一种新型电机过载保护装置,该装置利用一个磁环感应线圈采集电机的某一相电流信号,同时采用线路板以干触点接入交流接触器控制线圈回路,该方式能适应多种规格的交流电机保护。另外不同于传统保护方法只检测高限,文中所设计装置还包含低限检测线路,并通过对称负载中一相电流的变化来反映电机不同的工作状态,在保障电机不被损坏的情况下充分利用电机的过载能力。

关键词：电机保护高低限检测磁环感应线圈

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Ad Hoc网络时间同步技术研究

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计算机工程与设计 2008年第21期29卷 5447-5450页

作者：杨海东邓勇空军工程大学工程学院陕西西安710038

通过分析影响时间同步性能的6类网络延时,对几种基本的无线传感器网络时钟同步协议进行了介绍和性能比较,提出了一种基于时延探测机制的Ad Hoc网络时间同步协议。协议通过构造特定的工作方式及信息格式,将各类时延误差作为一个整体来探... 详细信息

通过分析影响时间同步性能的6类网络延时,对几种基本的无线传感器网络时钟同步协议进行了介绍和性能比较,提出了一种基于时延探测机制的Ad Hoc网络时间同步协议。协议通过构造特定的工作方式及信息格式,将各类时延误差作为一个整体来探测和消除。此外,由于时延探测过程和时间校正过程相互分离,减轻了时延探测过程中对于信息成功交互的时间要求,有利于降低网络的冲突和负担。分析表明,DMC-TS协议实现简单,扩展性好,由于针对所有的延时误差都进行了校正,因此能够提供较好的同步精度。

关键词：自组织网络时间同步时延探测分离实时性

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