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Revealing the role of electrode potential micro-environments in single Mn atoms for carbon dioxide and oxygen electrolysis

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Nano Research 2024年第9期17卷 7957-7966页

作者： Pengcheng liu anyi liu Kaili Wang Shuai Shi Mengmeng Jin Jingxiu liu Tao Qin Qian liu Xijun liu Jia He Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical EngineeringInstitute of New-Energy Materials and Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China School of Chemistry and Chemical Engineering and Environmental Engineering Weifang UniversityWeifang 261061China Department of Electrical Engineering and Automation Luoyang Institute of Science and TechnologyLuoyang 471023China Institute for Advanced Study Chengdu UniversityChengdu 610106China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China

Elucidation the relationship between electrode potentials and heterogeneous electrocatalytic reactions has attracted widespread *** we construct the well-defined Mn single-atom(MnSA)catalyst with four N-coordination through a simple thermal pyrolysis preparation method to investigate the electrode potential micro-environments effect on carbon dioxide reduction reactions(CO_(2)RR)and oxygen reduction reactions(ORR).MnSA catalysts generate higher CO production Faradaic efficiency of exceeding 90%at-0.9 V for CO_(2)RR and higher H_(2)O_(2)yield from 0.1 to 0.6 V with excellent ORR *** functional theory(DFT)calculations based on constant potential models were performed to study the mechanism of MnSA on CO_(2)*** thermodynamic energy barrier of CO_(2)RR is lowest at-0.9 V *** hydrogen electrode(RHE).Similar DFT calculations on the H_(2)O_(2)yield of ORR showed that the H_(2)O_(2)yield at 0.2 V was *** study provides a reasonable explanation for the role of electrode potential micro-environments.

关键词： electrode potential micro-environments Mn single-atom catalyst carbon dioxide reduction reaction oxygen reduction reaction constant potential models

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感知教师情感支持对初中生学习幸福感的影响:有调节的中介模型

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北京教育学院学报 2024年第5期38卷 43-50页

作者：孙文梅刘旭博刘安翼河南师范大学教育学部河南新乡453000 原阳县葛埠口乡第二初级中学河南新乡453506

采用中学生感知教师情感支持问卷、积极心理资本问卷和初中生学习主观幸福感量表,对716名初中生进行测查,探讨初中生感知教师情感支持对学习幸福感的预测作用。结果显示:感知教师情感支持、积极心理资本与学习幸福感三者之间均显著正相... 详细信息

采用中学生感知教师情感支持问卷、积极心理资本问卷和初中生学习主观幸福感量表,对716名初中生进行测查,探讨初中生感知教师情感支持对学习幸福感的预测作用。结果显示:感知教师情感支持、积极心理资本与学习幸福感三者之间均显著正相关;积极心理资本及其各维度在感知教师情感支持与学习幸福感之间发挥部分中介作用;性别在积极心理资本影响学习幸福感的这一中介过程的后半段起到调节作用,在初中男生群体中,积极心理资本对其学习幸福感的正向预测作用更强。建议增强教师情感支持,培养学生积极心理资本,关注学生性别差异,对不同年级要“因年级制宜”,提供有针对性的指导。

关键词：初中生感知教师情感支持积极心理资本学习幸福感

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Cloud Foren:A Novel Framework for Digital Forensics in Cloud Computing

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Journal of Harbin Institute of Technology(New Series) 2014年第6期21卷 39-45页

作者： Mathew Nyamagwa Jigang liu anyi liu Tetsutaro Uehara Dept.of Information and Computer Sciences Metropolitan State UniversitySaint Paul 55106USA Dept.of Computer Science Indiana University Purdue University Fort WayneFort Wayne 46805IndiananUSA Dept.of Computer Science College of Information Science & EngineeringRitsumeikan UniversityKusatsu 525875 5ShigaJapan

Since its birth in the early 90 's,digital forensics has been mainly focused on collecting and examining digital evidence from computers and networks that are controlled and owned by individuals or *** cloud computing has recently emerged as a dominant platform for running applications and storing data,digital forensics faces well-known challenges in the cloud,such as data inaccessibility,data and service volatility,and law enforcement lacks control over the *** date,very little research has been done to develop efficient theory and practice for digital forensics in the *** this paper,we present a novel framework,Cloud Foren,which systematically addresses the challenges of forensics in cloud *** Foren covers the entire process of digital forensics,from the initial point of complaint to the final point where the evidence is *** key components of Cloud Foren address some challenges,which are unique to the *** proposed forensic process allows cloud forensic examiner,cloud provider,and cloud customer collaborate *** use two case studies to demonstrate the applicability of Cloud *** believe Cloud Foren holds great promise for more precise and automatic digital forensics in a cloud computing environment.

关键词： digital forensics cloud computing framework

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Real-Time Timing Channel Detection in a Software-Defined Networking Virtual Environment

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Intelligent Information Management 2015年第6期7卷 283-302页

作者： anyi liu Jim X. Chen Harry Wechsler Department of Computer Science Indiana University—Purdue University Fort Wayne Fort Wayne USA Department of Computer Science George Mason University Fairfax USA

Despite extensive research, timing channels (TCs) are still known as a principal category of threats that aim to leak and transmit information by perturbing the timing or ordering of events. Existing TC detection approaches use either signature-based approaches to detect known TCs or anomaly-based approach by modeling the legitimate network traffic in order to detect unknown TCs. Un-fortunately, in a software-defined networking (SDN) environment, most existing TC detection approaches would fail due to factors such as volatile network traffic, imprecise timekeeping mechanisms, and dynamic network topology. Furthermore, stealthy TCs can be designed to mimic the legitimate traffic pattern and thus evade anomalous TC detection. In this paper, we overcome the above challenges by presenting a novel framework that harnesses the advantages of elastic re-sources in the cloud. In particular, our framework dynamically configures SDN to enable/disable differential analysis against outbound network flows of different virtual machines (VMs). Our framework is tightly coupled with a new metric that first decomposes the timing data of network flows into a number of using the discrete wavelet-based multi-resolution transform (DWMT). It then applies the Kullback-Leibler divergence (KLD) to measure the variance among flow pairs. The appealing feature of our approach is that, compared with the existing anomaly detection approaches, it can detect most existing and some new stealthy TCs without legitimate traffic for modeling, even with the presence of noise and imprecise timekeeping mechanism in an SDN virtual environment. We implement our framework as a prototype system, OBSERVER, which can be dynamically deployed in an SDN environment. Empirical evaluation shows that our approach can efficiently detect TCs with a higher detection rate, lower latency, and negligible performance overhead compared to existing approaches.

关键词： Covert Channel Timing Channel Intrusion Detection Virtualization Software-Defined Network

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Comprehensive reutilization of herbal waste:Coproduction of magnolol,honokiol,and β-amyrin from Magnolia officinalis residue

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Green Energy & Environment 2024年第2期9卷 403-412页

作者： Lukun Xiao anyi Zhao Jie Qiu An liu Sha Chen Jinzhu Jiang Jun Zhang Cong Guo Jipeng Di Jintang Cheng Chang Chen Kangxin Hou Aiping Zhang Yan liu Caixia Wang Institute of Chinese Materia Medica China Academy of Chinese Medical SciencesBeijing100700China School of Pharmacy Shanxi Medical UniversityTaiyuan030001China

Herbal extraction residues(HERs)cause serious environmental pollution and resource *** this study,a novel green route was designed for the comprehensive reutilization of all components in HERs,taking Magnolia officinalis residues(MOR)as an *** reluctant structure of MOR was first destroyed by alkali pretreatment to release the functional ingredients(magnolol and honokiol)originally remaining in MOR and to make MOR more accessible for hydrolysis.A metal–organic frame material MIL-101(Cr)with a maximum absorption capacity of 255.64 mg g^(-1)was synthesized to absorb the released honokiol and magnolol from the pretreated MOR solutions,and 40 g L^(-1)reducing sugars were obtained with 81.8%enzymatic hydrolysis rate at 10%MOR solid ***,382 mg L-1β-amyrin was produced from MOR hydrolysates by an engineered yeast *** total,1 kg honokiol,8 kg magnolol,and 7.64 kg β-amyrin could produce from 1 ton MOR by this cleaner process with a total economic output of 170,700 RMB.

关键词： Magnolia officinalis residues(MOR) Comprehensive utilization Metal-organic frame material Biosynthesis

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超软土地基交替式真空预压法加固效果影响因素分析

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岩石力学与工程学报 2022年第2期41卷 377-388页

作者：雷华阳刘安仪刘景锦李宸元天津大学建筑工程学院天津300354 天津大学滨海土木工程结构与安全教育部重点实验室天津300354

针对目前常规真空预压法处理超软土地基时常出现的排水板易淤堵、加固效果欠佳等工程问题,提出一种新型的交替式真空预压技术。为深入了解交替式真空预压技术处理超软土地基的加固效果及其影响因素,对天津滨海新区新近吹填淤泥进行室内... 详细信息

针对目前常规真空预压法处理超软土地基时常出现的排水板易淤堵、加固效果欠佳等工程问题,提出一种新型的交替式真空预压技术。为深入了解交替式真空预压技术处理超软土地基的加固效果及其影响因素,对天津滨海新区新近吹填淤泥进行室内模型试验。试验结果表明,与常规真空预压法相比,交替式真空预压法可以有效防止淤堵泥层的加剧,使得土体加固效果提升。其中交替式真空预压的真空压力大小、交替时机等因素对土体的加固效果有明显的影响,采用较小的真空压力,或者在淤堵泥层开始形成阶段进行交替,能有效提高土体的加固效果,结果显示可增大土体排水量6.25%~14.82%,增大沉降量4.28%~7.73%,提高十字板剪切强度4.53%~18.7%。

关键词：地基基础超软土地基处理交替式真空预压淤堵模型试验

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Whole-genome sequencing identifies novel genes for autism in Chinese trios

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Science China Life Sciences 2024年

作者： Suhua Chang Jia Jia liu Yilu Zhao Tao Pang Xiangyu Zheng Zhirui Song anyi Zhang Xuping Gao Lingxue Luo Yanqing Guo Jing liu Li Yang Lin Lu Peking University Sixth Hospital Peking University Institute of Mental HealthNHC Key Laboratory of Mental Health (Peking University)National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital) Chinese Academy of Medical Sciences Research Unit (No.2018RU006) Peking University School of Nursing Peking University Wuhan Biobank National Institute on Drug Dependence Peking University

Autism spectrum disorder (ASD) is a neurodevelopmental disorder with high genetic heritability but *** understanding its genetics requires whole-genome sequencing (WGS),but the ASD studies utilizing WGS data in Chinese population are *** this study,we present a WGS study for 334 individuals,including 112 ASD patients and their non-ASD *** identified 146 de novo variants in coding regions in 85 cases and 60 inherited variants in coding *** integrating these variants with an association model,we identified 33 potential risk genes (P<0.001) enriched in neuron and regulation related biological *** the well-known ASD genes (SCN2A,NF1,SHANK3,CHD8 etc.),several high confidence genes were highlighted by a series of functional analyses,including CTNND1,DGKZ,LRP1,DDN,ZNF483,NR4A2,SMAD6,INTS1,and MRPL12,with more supported evidence from GO enrichment,expression and network *** also integrated RNA-seq data to analyze the effect of the variants on the gene expression and found 12 genes in the individuals with the related variants had relatively biased *** further presented the clinical phenotypes of the proband carrying the risk genes in both our samples and Caucasian samples to show the effect of the risk genes on *** variants in noncoding regions,a total of 74 de novo variants and 30 inherited variants were predicted as pathogenic with high confidence,which were mapped to specific genes or regulatory *** number of de novo variants found in patient was significantly associated with the parents’ages at the birth of the child,and gender with *** also identified small de novo structural variants in ASD *** results in this study provided important evidence for understanding the genetic mechanism of ASD.

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基于深度神经网络的太阳能电池组件缺陷检测算法研究

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应用光学 2020年第2期41卷 327-336页

作者：刘怀广刘安逸周诗洋刘恒玉杨金堂武汉科技大学机械传动与制造工程湖北省重点实验室湖北武汉430081 武汉科技大学机器人与智能系统研究院湖北武汉430081

针对太阳能电池组件中电池片出现隐裂导致整片电池破碎,最终影响整个组件发电量的问题,在对电池组件光致发光(PL)图像待检测区域筛选定位的基础上,提出了一种利用卷积神经网络(CNN)进行电池组件隐裂缺陷检测的方法。首先利用PL成像方法... 详细信息

针对太阳能电池组件中电池片出现隐裂导致整片电池破碎,最终影响整个组件发电量的问题,在对电池组件光致发光(PL)图像待检测区域筛选定位的基础上,提出了一种利用卷积神经网络(CNN)进行电池组件隐裂缺陷检测的方法。首先利用PL成像方法获取电池组件图像,然后对图像进行预处理,基于聚类的方法对待检测目标区域进行筛选定位,最后利用3种不同结构的卷积神经网络模型对电池片进行缺陷检测,并进行准确率对比,使最优识别准确率达到99.25%。实验结果验证了该方法能准确地检测出太阳能电池组件的隐裂缺陷。

关键词：光致发光卷积神经网络图像识别缺陷检测

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论傅寿彤绝句创作的思想内容

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滁州职业技术学院学报 2023年第1期22卷 95-100页

作者：刘安燚陈欣贵州师范学院文学与传媒学院贵州贵阳550018

傅寿彤是清代黔籍名人。在其现存诗集《澹勤室诗》中,绝句占比超过三分之一,是他重要的诗歌创作形式。傅寿彤常年转战大河南北,雅歌不废,诗中多有对社会动乱之实录,主要叙写山河破碎、战火纷飞,黎民遭难、流离失所,表现了他的一腔热血... 详细信息

傅寿彤是清代黔籍名人。在其现存诗集《澹勤室诗》中,绝句占比超过三分之一,是他重要的诗歌创作形式。傅寿彤常年转战大河南北,雅歌不废,诗中多有对社会动乱之实录,主要叙写山河破碎、战火纷飞,黎民遭难、流离失所,表现了他的一腔热血和与国与民的赤子之心。虽然傅寿彤在外是戎马纵横、叱咤风云的将领,但是面对家乡和亲人,他有着深切怀念,诗作中体现了他铁骨铮铮的硬汉形象下的柔情。绝句中还有一些萧散闲逸之作,有与师友的交游酬唱,还有对山川景秀画卷亭台表达喜爱的题咏,这些是他优游觞咏雅致生活的体现。

关键词：傅寿彤绝句思想内容

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多重肺部感染的菌群分布及细菌耐药性分析

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安徽医学 2011年第11期32卷 1817-1820页

作者：刘安怡费广鹤阜阳市人民医院呼吸内科 236006

目的分析多重肺部感染痰培养病原菌的分布特征和对常见抗生素的耐药情况,为临床合理选用抗生素和提高治愈率提供依据。方法回顾性调查分析2008年和2009年2～3月329例下呼吸道感染患者的痰培养检测结果。采用纸片扩散法对分离的397株菌... 详细信息

目的分析多重肺部感染痰培养病原菌的分布特征和对常见抗生素的耐药情况,为临床合理选用抗生素和提高治愈率提供依据。方法回顾性调查分析2008年和2009年2～3月329例下呼吸道感染患者的痰培养检测结果。采用纸片扩散法对分离的397株菌株进行细菌培养、鉴定和药敏实验。结果 329例病例中,有53例为多重肺部感染(16.1%)。病原菌中前4位是铜绿假单胞菌(21例),鲍曼不动杆菌(17例),白色念珠菌(15例)和金黄色葡萄球菌(12例)。60岁及以上36例(67.9%)。所有的病例以呼吸科的患者为主(30.2%)。检出的97株细菌中,多重耐药菌69株(71.1%),其中革兰阴性杆菌52株,阳性球菌17株,泛耐药细菌5株(5.2%),均为阴性杆菌。多重耐药菌中,阴性杆菌对青霉素类,头孢菌素一代、二代、三代,喹诺酮类和氨基糖苷类的耐药率在50%～100%,而对亚胺培南的耐药率最低;阳性球菌对万古霉素全部敏感,对青霉素类,亚胺培南和红霉素基本完全耐药。白色念珠菌对两性霉素B全部敏感,而对伏立康唑、伊曲康唑和氟康唑有不同程度的耐药,但均在10%以下。结论多重肺部感染的常见病原菌有铜绿假单胞菌,鲍曼不动杆菌,白色念珠菌和金黄色葡萄球菌。感染的病例60岁以上患者占多数,以呼吸科最多见。革兰阴性杆菌对广谱青霉素,头孢菌素,氨基糖苷类和喹诺酮类药物等不同程度耐药,但对亚胺培南敏感。阳性球菌对万古霉素全部敏感。白色念珠菌对两性霉素B全部敏感,对其他药物大部分敏感。

关键词：多重肺部感染痰培养病原菌谱耐药性抗生素

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