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Structure Engineering of Layered Double Hydroxides(LDHs)for Heterogeneous Catalysis

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Chemical Research in Chinese Universities 2024年第4期40卷 590-610页

作者： gao Zhexi MA haoran WANG Qian LI Dianqing FENG Junting DUAN Xue State Key Laboratory of Chemical Resource Engineering Beijing Engineering Center for Hierarchical CatalystsBeijing University of Chemical TechnologyBeijing100029P.R.China Quzhou Institute for Innovation in Resource Chemical Engineering Quzhou324000P.R.China

Layered double hydroxide(LDH)is regarded as an advanced platform material in catalysis and attracts vast attrition *** a kind of two-dimensional layered material,it exhibits great advantages including cation-tunability in layer,lattice limitation,topological transformation,ion exchange and intercalation *** also can be used as building blocks for composite catalytic *** 100 years,a large number of works have been accomplished and researchers made great progress on investigating the LDH-based catalytic *** this review,we summarize representative achievements and significant progress in recent years,which mainly include constructing high entropy catalytic material,high dispersion/stability and interfacial supported catalytic material,composite catalytic materials and nano-reactor based on ***,through collecting the excellent works,we conclude the future development potential of LDH and provide a perspective.

关键词： Layered double hydroxide(LDH)material Heterogeneous catalysis Structure engineering

Parallel System Based Quantitative Assessment and Self-evolution for Artificial Intelligence of Active Power Corrective Control

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 13-28页

作者： Tianyun Zhang Jun Zhang Feiyue Wang Peidong Xu Tianlu gao haoran Zhang Ruiqi Si School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072HubeiChina State Key Laboratory for Management and Control of Complex System Institute of AutomationChinese Academy of SciencesBeijing 100190China

In artificial intelligence(AI)based-complex power system management and control technology,one of the urgent tasks is to evaluate AI intelligence and invent a way of autonomous intelligence ***,there is,currently,nearly no standard technical framework for objective and quantitative intelligence *** this article,based on a parallel system framework,a method is established to objectively and quantitatively assess the intelligence level of an AI agent for active power corrective control of modern power systems,by resorting to human intelligence evaluation *** this basis,this article puts forward an AI self-evolution method based on intelligence assessment through embedding a quantitative intelligence assessment method into automated reinforcement learning(AutoRL)systems.A parallel system based quantitative assessment and self-evolution(PLASE)system for power grid corrective control AI is thereby constructed,taking Bayesian Optimization as the measure of AI evolution to fulfill autonomous evolution of AI under guidance of their intelligence assessment *** results exemplified in the power grid corrective control AI agent show the PLASE system can reliably and quantitatively assess the intelligence level of the power grid corrective control agent,and it could promote evolution of the power grid corrective control agent under guidance of intelligence assessment results,effectively,as well as intuitively improving its intelligence level through selfevolution.

关键词： AI quantitative intelligence assessment and self-evolution automated reinforcement learning Bayesian optimization corrective control parallel system

Three-dimensional porous In_(2)O_(3) arrays for self-powered transparent solar-blind photodetectors with high responsivity and excellent spectral selectivity

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Nano Research 2024年第5期17卷 4471-4477页

作者： Nana Zhang Xinyu gao haoran Guan Simin Sun Jiaming Liu Zhitao Shao Qiyue gao Yuan Zhang Ruyu Sun Guang Yang Feng gao Wei Feng College of Chemistry Chemical Engineering and Resource UtilizationNortheast Forestry UniversityHarbin 150040China Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025China

Transparent solar-blind ultraviolet photodetectors(SBUV PDs)have extensive applications in versatile scenarios,such as optical ***,it is still challenging to simultaneously achieve high responsivity,high transparency,and satisfying self-powered ***,we demonstrated high-performance,transparent,and self-powered photoelectrochemical-type(PEC)SBUV PDs based on vertically grown ultrathin In_(2)O_(3) nanosheet arrays(NAs)with a three-dimensional(3D)porous *** 3D porous structure simultaneously improves the transmittance in the visible light region,accelerates interfacial reaction kinetics,and promotes photogenerated carrier *** performance of In_(2)O_(3) NAs photoanodes exceeds most reported self-powered PEC SBUV PDs,exhibiting a high transmittance of approximately 80%in the visible light region,a high responsivity of 86.15 mA/W for 254 nm light irradiation,a fast response speed of 15/18 ms,and good multicycle *** In_(2)O_(3) NAs also show excellent spectral selectivity with an ultrahigh solar-blind rejection ratio of 1319.30,attributed to the quantum confinement effect induced by the ultrathin feature(2-3 nm).Furthermore,In_(2)O_(3) NAs photoanodes show good capability in underwater optical *** work demonstrated that a 3D porous structure is a powerful strategy to synchronously achieve high responsivity and transparency and provides a new perspective for designing high-performance,transparent,and self-powered PEC SBUV PDs.

关键词： In_(2)O_(3) three-dimensional porous transparent photoelectrochemical solar-blind photodetectors

甲酰基肽受体1对脊髓损伤后小胶质细胞诱导的炎性反应的影响

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脊柱外科杂志 2024年第1期22卷 32-36,58页

作者：宋扬钱澍魏飞龙周程沛袁一方郭时空高浩然钱济先高全有空军军医大学第二附属医院骨科西安710038

目的探讨甲酰基肽受体1(Fpr1)是否参与脊髓损伤(SCI)后小胶质细胞诱导的炎性反应,为SCI后减轻神经炎性反应提供理论依据。方法将30只成年C57BL/6雄性小鼠按照随机数字表法分为假手术组(Sham组)和不同时间点SCI组(术后1、3、5、7 d),每组... 详细信息

目的探讨甲酰基肽受体1(Fpr1)是否参与脊髓损伤(SCI)后小胶质细胞诱导的炎性反应,为SCI后减轻神经炎性反应提供理论依据。方法将30只成年C57BL/6雄性小鼠按照随机数字表法分为假手术组(Sham组)和不同时间点SCI组(术后1、3、5、7 d),每组6只。采用蛋白质印迹检测小鼠SCI后不同时间点损伤周围脊髓组织Fpr1蛋白的表达变化,采用免疫荧光实验检测Fpr1在小胶质细胞中的定位。选择Fpr1蛋白表达水平最高时间点制作小鼠模型进行进一步实验,将小鼠随机分为SCI组和Fpr1抑制剂(HCH6-1)干预组(HCH6-1干预组),每组6只,并与Sham组比较,应用免疫荧光实验评估各组小胶质细胞的活化程度,通过蛋白质印迹检测各组炎性因子[白细胞介素(IL)-1β、IL-18和肿瘤坏死因子-α(TNF-α)]以及炎性小体(NLRP3、ASC和Caspase-1)蛋白的表达情况。结果与Sham组相比,Fpr1在SCI后第1天开始表达增多,第3天最高,第5天下降,第7天下降至与Sham组水平相当。免疫荧光染色结果提示,Fpr1主要表达在小胶质细胞。与SCI组相比,HCH6-1干预组小胶质细胞的活化程度显著减轻,炎性因子(IL-1β、IL-18和TNF-α)和炎性小体(NLRP3、ASC和Caspase-1)的表达显著减少。结论Fpr1能够介导SCI后小胶质细胞诱导的炎性反应,抑制Fpr1有望成为干预SCI后继发性损伤的新治疗策略。

关键词：脊髓损伤受体甲酰肽小胶质细胞炎症小鼠

Early chatter identification based on optimized VMD with multi-band information fusion and compression method in robotic milling process

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Chinese Journal of Aeronautics 2024年第6期37卷 464-484页

作者： Sichen CHEN Zhiqiang LIANG Yuchao DU Zirui gao haoran ZHENG Zhibing LIU Tianyang QIU Xibin WANG School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China

Undesirable self-excited chatter has always been a typical issue restricting the improvement of robotic milling quality and *** chatter identification based on processing signals can prompt operators to adjust the machining process and prevent chatter *** with the traditional machine tool,the uncertain multiple chatter frequency bands and the band-moving of the chatter frequency in robotic milling process make it more challenging to extract chatter *** paper proposes a novel method of chatter identification using optimized variational mode decomposition(OVMD)with multi-band information fusion and compression technology(MT).During the robotic milling process,the number of decomposed modes k and the penalty coefficient a are optimized based on the dominant component of frequency scope partition and fitness of the mode center ***,the mayfly optimization algorithm(MA)is employed to obtain the global optimal parameter *** order to conquer information collection about the uncertain multiple chatter frequency bands and the band-moving of the chatter frequency in robotic milling process,MT is presented to reduce computation and extract signal ***,the cross entropy of the image(CEI)is proposed as the final chatter indicator to identify the chatter *** robotic milling experiments are carried out to verify the proposed method,and the results show that it can distinguish the robotic milling condition by extracting the uncertain multiple chatter frequency bands and overcome the band-moving of the chatter frequency in robotic milling process.

关键词： Robotic milling Chatter detection Variational mode decomposition Information fusion and compression Chatter featur

利用信号处理技术改善布里渊光时域反射仪空间分辨率研究进展

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激光与光电子学进展 2024年第13期61卷 34-44页

作者：刘鑫煜陈理平陈玉明李拥政付林林马丁忆高浩然黄秋茗陈映恺郭林峰南京信息工程大学物理与光电工程学院江苏南京210044 中铁(上海)投资集团有限公司上海200126 江苏省产品质量监督检验研究院江苏南京210007 中铁三局集团华东建设有限公司江苏南京211153 中铁隧道集团二处有限公司河北廊坊065200

空间分辨率是衡量布里渊光时域反射技术的一项重要指标。传统的布里渊光时域反射仪空间分辨率被限制在1 m,已经不能完全满足工程领域对于高空间分辨率的需求。为了提高系统的空间分辨率,研究者们通常采用两种方法,即光路端的光脉冲调制... 详细信息

空间分辨率是衡量布里渊光时域反射技术的一项重要指标。传统的布里渊光时域反射仪空间分辨率被限制在1 m,已经不能完全满足工程领域对于高空间分辨率的需求。为了提高系统的空间分辨率,研究者们通常采用两种方法,即光路端的光脉冲调制和电路端的信号处理。然而在简化系统结构、降低硬件成本和实现迭代升级方面,通过后端信号处理的方法有一定优势,也更能契合工程应用领域追求仪器性价比、批量产业化应用的需求。本文详细介绍了基于脉冲分段和布里渊谱分析的改善空间分辨率的信号处理方法,对这些方法的原理及实验方案进行了分析讨论,并对每种方法得到的效果进行了概括比较,最后对布里渊光时域反射技术的发展前景进行了展望。

关键词：分布式光纤传感技术布里渊光时域反射技术空间分辨率信号处理技术

Productivity Prediction Model of Perforated Horizontal Well Based on Permeability Calculation in Near-Well High Permeability Reservoir Area

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Energy Engineering 2024年第1期121卷 59-75页

作者： Shuangshuang Zhang Kangliang Guo Xinchen gao haoran Yang Jinfeng Zhang Xing Han College of the Earth Science Yangtze UniversityWuhan430100China PetroChina Changqing Oilfield Fifth Oil Production Plant Xi’an710201China Sinopec Jianghan Oilfield Information Center Wuhan430100China

To improve the productivity of oil wells,perforation technology is usually used to improve the productivity of horizontal wells in oilfield *** the perforation operation,the perforation channel around the wellbore will form a near-well high-permeability reservoir area with the penetration depth as the radius,that is,the formation has different permeability characteristics with the perforation depth as the dividing ***,the permeability is measured by the permeability tester,but this approach has a high workload and limited *** this paper,according to the reservoir characteristics of perforated horizontal wells,the reservoir is divided into two areas:the original reservoir area and the near-well high permeability reservoir *** on the theory of seepage mechanics and the formula of open hole productivity,the permeability calculation formula of near-well high permeability reservoir area with perforation parameters is *** to the principle of seepage continuity,the seepage is regarded as the synthesis of two directions:the horizontal plane elliptic seepage field and the vertical plane radial seepage field,and the oil well productivity prediction model of the perforated horizontal well is established by *** model comparison demonstrates that the model is reasonable and *** calculate and analyze the effect of oil well production and the law of influencing factors,actual production data of the oilfield are substituted into the oil well productivity *** can effectively guide the technical process design and effect prediction of perforated horizontal wells.

关键词： Perforated horizontal well permeability productivity model sensitivity analysis

Controllable two-dimensional Kerr and Raman–Kerr frequency combs in microbottle resonators with selectable dispersion

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Photonics Research 2021年第2期9卷 171-180页

作者： XUEYING JIN XIN XU haoran gao KEYI WANG HAOJIE XIA LIANDONG YU School of Instrument Science and Opto-electronics Engineering Hefei University of TechnologyHefei 230009China Department of Precision Machinery and Precision Instrumentation University of Science and Technology of ChinaHefei 230026China

We report a broadband two-dimensional(2 D) Kerr and Raman–Kerr frequency comb generation in a silica bottle resonator accounting for azimuthal and axial degrees of freedom and pioneer a method that allows for controlled and reversible switching between a four wave mixing(FWM) state and a stimulated Raman scattering state. The repetition rate of the Raman–Kerr comb is not an integer number of the free spectral range, which spans more than 242 nm with hundreds of teeth. We show that, experimentally and numerically, multiple 2 D comb regimes can be selectively accessed via dispersion engineering by exciting different orders of axial modes or modifying the curvature of the axial profile, involving cascaded FWM, Raman lasing, and Raman-assisted FWM. The effect of axial curvature on dispersion is associated with the axial mode number in bottle resonators. Our approach enables dispersion and spectral engineering flexibility in any resonator with localized axial modes.

关键词： resonator dispersion curvature

Surface-enhanced Raman spectroscopy chips based on two-dimensional materials beyond graphene

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Journal of Semiconductors 2021年第5期42卷 38-47页

作者： Enqing Zhang Zhengkun Xing Dian Wan haoran gao Yingdong Han Yisheng gao Haofeng Hu Zhenzhou Cheng Tiegen Liu1 21School of Precision Instruments and Opto-electronics EngineeringTianjin UniversityTianjin 300072China Key Laboratory of Opto-electronics Information Technology Ministry of EducationTianjin 300072China Department of Electrical Engineering The Hong Kong Polytechnic UniversityHong KongChina Department of Chemistry The University of TokyoTokyo 113-0033Japan

Surface-enhanced Raman spectroscopy(SERS) based on two-dimensional(2 D) materials has attracted great attention over the past decade. Compared with metallic materials, which enhance Raman signals via the surface plasmon effect, 2 D materials integrated on silicon substrates are ideal for use in the fabrication of plasmon-free SERS chips, with the advantages of outstanding fluorescence quenching capability, excellent biomolecular compatibility, tunable Fermi levels, and potentially lowcost material preparation. Moreover, recent studies have shown that the limits of detection of 2 D-material-based SERS may be comparable with those of metallic substrates, which has aroused significant research interest. In this review, we comprehensively summarize the advances in SERS chips based on 2 D materials. As several excellent reviews of graphene-enhanced Raman spectroscopy have been published in the past decade, here, we focus only on 2 D materials beyond graphene, i.e., transition metal dichalcogenides, black phosphorus, hexagonal boron nitride, 2 D titanium carbide or nitride, and their heterostructures. We hope that this paper can serve as a useful reference for researchers specializing in 2 D materials, spectroscopy, and diverse applications related to chemical and biological sensing.

关键词： Raman spectroscopy surface-enhanced Raman spectroscopy two-dimensional materials