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Effect of Partial Replacement of Fly Ash by Decoration Waste Powder on the Fresh and Mechanical Properties of Geopolymer Masonry Mortar

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Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 698-704页

作者：刘惠 ZHANG Ruidong 朱平华 WANG Xinjie chen Chunhong School of Urban Construction Changzhou UniversityChangzhou 213164China

This study aims to investigate the feasibility of using decoration waste powder(DWP)as a partial replacement for fly ash(fa)in the preparation of geopolymer masonry mortar,and to examine the effect of different DWP replacement rates(0%-40%)on the fresh and mechanical properties of the *** results showed that each group of geopolymer masonry mortar exhibited excellent water retention performance,with a water retention rate of 100%,which was due to the unique geopolymer mortar system and high viscosity of the alkaline activator *** to the control group,the flowability of the mortar containing lower contents of DWP(10%and 20%)was ***,as the DWP replacement rate further increased,the flowability gradually *** DWP could absorb the free water in the reaction system of geopolymer mortar,thereby limiting the occurrence of geopolymerization *** incorporation of DWP in the mortar resulted in a decrease in compressive strength compared to the mortar without ***,even at a replacement rate of 40%,the compressive strength of the mortar still exceeded 15 MPa,which met the requirements of the masonry *** was feasible to use DWP in the geopolymer masonry *** the addition of DWP caused some performance loss,it did not affect its usability.

关键词： fly ash-based geopolymer decoration waste powder masonry mortar workability compressive strength

基于TiO_(2)纳米柱的多波段响应Cs_(2)AgBiBr_(6)双钙钛矿光电探测器

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物理学报 2024年第7期73卷 333-343页

作者：孙堂友余燕丽覃祖彬陈赞辉陈均丽江玥张法碧桂林电子科技大学广西精密导航技术与应用重点实验室桂林541004

全无机无铅双钙钛矿材料(Cs_(2)AgBiBr_(6))具有载流子寿命长、稳定性高和禁带宽度适中等优点,近年来在光电探测器的应用研究上受到广泛关注.本文通过将水热法生长的TiO_(2)纳米柱阵列嵌入到Cs_(2)AgBiBr_(6)层中形成紧密的核壳结构,增... 详细信息

全无机无铅双钙钛矿材料(Cs_(2)AgBiBr_(6))具有载流子寿命长、稳定性高和禁带宽度适中等优点,近年来在光电探测器的应用研究上受到广泛关注.本文通过将水热法生长的TiO_(2)纳米柱阵列嵌入到Cs_(2)AgBiBr_(6)层中形成紧密的核壳结构,增大两者的物理接触面积,提高光电探测器电子注入与电荷分离的效率.此外,TiO_(2)纳米柱阵列还可以有效减小光在器件表面的反射损耗,增强Cs_(2)AgBiBr_(6)薄膜的光捕获能力.实验结果表明,基于TiO_(2)纳米柱的多波段响应Cs_(2)AgBiBr_(6)双钙钛矿光电探测器在365 nm及405 nm多个波长均能激发高光响应且有良好稳定性和重复性,所得平均开关比分别为522和2090,以0.056 W/cm^(2)固定光强激发,响应度分别为0.019 A/W和0.057 A/W,比探测率分别为1.9×10^(10)Jones和5.6×10^(10)Jones.相比于传统TiO_(2)薄膜型Cs_(2)AgBiBr_(6)光电探测器,平均开关比分别提升65倍和110倍,响应度分别提升35%和256%,比探测率分别提升6.9倍和25倍.上述结果表明,基于TiO_(2)纳米柱的多波段响应Cs_(2)AgBiBr_(6)双钙钛矿光电探测器可为提高光电器件的效率提供参考方案.

关键词： Cs_(2)AgBiBr_(6) 光电探测器 TiO_(2)纳米柱多波段响应

Lax-Oleinik-Type Formulas and Efficient Algorithms for Certain High-Dimensional Optimal Control Problems

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Communications on Applied Mathematics and Computation 2024年第2期6卷 1428-1471页

作者： Paula chen Jerome Darbon Tingwei Meng Division of Applied Mathematics Brown UniversityProvidenceRIUSA Department of Mathematics UCLALos AngelesCAUSA

Two of the main challenges in optimal control are solving problems with state-dependent running costs and developing efficient numerical solvers that are computationally tractable in high *** this paper,we provide analytical solutions to certain optimal control problems whose running cost depends on the state variable and with constraints on the *** also provide Lax-Oleinik-type representation formulas for the corresponding Hamilton-Jacobi partial differential equations with state-dependent ***,we present an efficient,grid-free numerical solver based on our representation formulas,which is shown to scale linearly with the state dimension,and thus,to overcome the curse of *** existing optimization methods and the min-plus technique,we extend our numerical solvers to address more general classes of convex and nonconvex initial *** demonstrate the capabilities of our numerical solvers using implementations on a central processing unit(CPU)and a field-programmable gate array(FPGA).In several cases,our FPGA implementation obtains over a 10 times speedup compared to the CPU,which demonstrates the promising performance boosts FPGAs can *** numerical results show that our solvers have the potential to serve as a building block for solving broader classes of high-dimensional optimal control problems in real-time.

关键词： Optimal control Hamilton-Jacobi partial differential equations Grid-free numerical methods High dimensions Field-programmable gate arrays(FPGAs)

基于航拍数据的高速公路出口环圈匝道行车安全性评价方法

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长安大学学报（自然科学版） 2024年第4期44卷 108-118页

作者：张敏陈嘉乐张驰王世法肖锋长安大学运输工程学院陕西西安710064 长安大学公路学院陕西西安710064 四川成绵苍巴高速公路有限责任公司成都分公司四川成都610213 四川雅康高速公路有限责任公司四川雅安625000 四川藏区高速公路有限责任公司四川成都610047

为准确评估高速公路环圈匝道不同交通状况下碰撞护栏和追尾的风险,改善出口环圈匝道行车安全不足现状,提出一种基于航拍数据的行车风险评估方法。首先,通过分析3个实际案例的车辆速度和轨迹数据,总结高速公路互通式立交出口环圈匝道的... 详细信息

为准确评估高速公路环圈匝道不同交通状况下碰撞护栏和追尾的风险,改善出口环圈匝道行车安全不足现状,提出一种基于航拍数据的行车风险评估方法。首先,通过分析3个实际案例的车辆速度和轨迹数据,总结高速公路互通式立交出口环圈匝道的车辆行驶特征,并定义2种主要的事故类型(车辆进入匝道后与左侧护栏相撞、由于跟驰状态导致的追尾)。其次,介绍如何计算安全评估指标(横向距离和碰撞时间),并根据出口环圈匝道特点选择合适的评估阈值,建立行车安全性评估方法。最后,通过实际案例的分析,验证该方法的有效性。研究结果表明:车辆在匝道内的速度和轨迹控制呈现一致性,车辆需要约135 m的距离从变速到稳定;为避免与左侧护栏相撞,车辆在匝道内会有向右偏移的趋势,偏移长度与初始车速相关;在减速车道上,车辆几乎没有撞击护栏的风险,但在跟驰状态下,前车进入匝道可能导致追尾事故;车速过快可能导致在匝道入口处与左侧护栏相撞;所提出方法与历史事故数据的预测结果相符。研究提供了一种新的出口环圈匝道行车安全性分析方法,将行车特征与安全性分析量化,可为立交出口的管理和设计提供理论支持。

关键词：交通工程出口环圈匝道安全性评价行车特征交通数据获取

Interplay between microglia and environmental risk factors in Alzheimer's disease

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Neural Regeneration Research 2024年第8期19卷 1718-1727页

作者： Miaoping Zhang Chunmei Liang Xiongjin chen Yujie Cai Lili Cui Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases Affiliated Hospital of Guangdong Medical UniversityZhanjiangGuangdong ProvinceChina

Alzheimer s disease,among the most common neurodegenerative disorders,is chara cterized by progressive cognitive *** present,the Alzheimer’s disease main risk remains genetic ris ks,but major environmental fa ctors are increasingly shown to impact Alzheimer’s disease development and ***,the most important brain immune cells,play a central role in Alzheimer’s disease pathogenesis and are considered environmental and lifestyle"sensors."factors like environmental pollution and modern lifestyles(e.g.,chronic stress,poor dietary habits,sleep,and circadian rhythm disorde rs)can cause neuroinflammato ry responses that lead to cognitive impairment via microglial functioning and phenotypic ***,the specific mechanisms underlying interactions among these facto rs and microglia in Alzheimer’s disease are ***,we:discuss the biological effects of air pollution,chronic stress,gut micro biota,sleep patterns,physical exercise,cigarette smoking,and caffeine consumption on microglia;consider how unhealthy lifestyle factors influence individual susceptibility to Alzheimer’s disease;and present the neuroprotective effects of a healthy *** intervening and controlling these environmental risk fa ctors at an early Alzheimer’s disease stage,understanding the role of microglia in Alzheimer’s disease development,and to rgeting strategies to to rget microglia,co uld be essential to future Alzheimer’s disease treatments.

关键词： Alzheimer’s disease chronic stress environmental factor gut microbiota microglia particulate matter with diameter<2.5μm

Enriched photosensitizer for deep-seated-tumor photodynamic therapy

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Photonics Research 2024年第5期12卷 1024-1035页

作者： HONGRUI SHAN XUEQIAN WANG QIHENG WEI HAILANG DAI XIANFENG chen State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems Department of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Metal Matrix Composites Shanghai Key Laboratory for Molecular Engineering of Chiral DrugsSchool of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of Light Manipulations and Applications Shandong Normal UniversityJinan 250358China

Photodynamic therapy(PDT)is an innovative approach that utilizes photochemical reactions for non-invasive disease *** PDT is limited by the low penetration depth of visible light required for ***,we employed upconversion nanoparticles(UCNPs)to extend the activation wavelength of photosensitizers into the infrared range,enabling a treatment depth of over 10 ***,we also used the abundant amino groups of branched polyethyleneimine(PEI)with spatial structure to enhance the loading capacity of protoporphyrin(PPIX),and we ultimately improved skin tumor clearance ***,we achieved tumor-specific treatment by utilizing folic acid(fa)targeting and active enrichment of *** to cellular experimental results,we demonstrated the remarkable reactive oxygen species generation capability of the material and ultra-low dark ***,we investigated the apoptosis mechanism and demonstrated that the synthesized nanoparticle stimulates the up-regulation of apoptosis-associated proteins Bax/Bcl-2 and Cyto *** in vivo experiments involving intravenous injection in mouse tails,we investigated the anticancer efficacy of the nanoparticle,confirming its excellent PDT *** research provides a promising avenue for future non-invasive treatment of deep-seated tumors,offering a method for the treatment and management of specific cancers.

关键词： treatment utilize utilizing

Tributyltin causes generational neurodevelopmental toxicity and the protective effect of folic acid in zebrafish

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Journal of Environmental Sciences 2024年第3期137卷 615-625页

作者： Haoxing Cai Naying Zheng chen Tang Yuxuan Zhang Zhenghong Zuo chengyong He State Key Laboratory of Cellular Stress Biology School of Life SciencesFaculty of Medicine and Life SciencesXiang’an Hospital of Xiamen UniversityXiamen UniversityXiamen 361005China

Tributyltin(TBT),a common organotin environmental pollutant,may pose a threat to human development during critical early-life *** aimed to assess the neurodevelopmental intergenerational toxicity of early-life exposure to TBT and the protective effect of DNA methyl donor folic acid(fa).Specifically,after early-life exposure(1–21 days postfertilization,dpf)to TBT(0,1,10 and 100 ng/L),zebrafish(Danio rerio)were cultured in clean medium until sexual *** exposed females were mated with unexposed males to produce embryos(F1).The F1 generation were cultured(4–120 hours post-fertilization,hpf)with and without 1 mmol/L *** neurotoxic effects of early-life TBT exposure for zebrafish and their offspring(F1)were significantly enhanced anxiety and reduced aggression,decreased gene expression of DNA methyltransferase in the brain and increased serotonin levels in the ***,the intergenerational neurodevelopmental toxicity,as manifested in the F1 generation,was attenuated by fa *** summary,early-life TBT exposure led to intergenerational neurodevelopmental deficits in zebrafish,and DNA methyl donors had a protective effect on F1 neurodevelopment,which can inform the prevention and treatment of intergenerational neurotoxicity due to organotin pollutants.

关键词： Tributyltin Neurodevelopment Intergeneration DNA methylation Folic acid Zebrafish

Scintillation Arc from FRB 20220912A

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Science China(Physics,Mechanics & Astronomy) 2024年第1期67卷 134-142页

作者： Zi-Wei Wu Robert AMain Wei-Wei Zhu Bing Zhang Peng Jiang Jia-Rui Niu Jin-Lin Han Di Li Ke-Jia Lee Dong-Zi Li Yuan-Pei Yang fa-Yin Wang Rui Luo Pei Wang chen-Hui Niu Heng Xu Bo-Jun Wang Wei-Yang Wang Yong-Kun Zhang Yi Feng De-Jiang Zhou Yong-Hua Xu Can-Min Deng Yu-Hao Zhu National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Max-Planck-Institut für Radioastronomie Bonn 53121Germany Institute for Frontier in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China Nevada Center for Astrophysics and Department of Physics and Astronomy University of NevadaLas VegasNV 89154USA CAS Key Laboratory of faST National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronomy University of Chinese Academy of SciencesBeijing 100049China NAOC-UKZN Computational Astrophysics Centre University of KwaZulu-NatalDurban 4000South Africa Department of Astronomy Peking UniversityBeijing 100871China Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China Cahill Center for Astronomy and Astrophysics California Institute of TechnologyPasadena 91125USA South-Western Institute For Astronomy Research Yunnan UniversityKunming 650504China School of Astronomy and Space Science Nanjing UniversityNanjing 210093China Key Laboratory of Modern Astronomy and Astrophysics(Nanjing University) Ministry of EducationNanjing 210023China CSIRO Space and Astronomy Epping 1710Australia Department of Astronomy School of Physics and Materials ScienceGuangzhou UniversityGuangzhou 510006China Research Center for Intelligent Computing Platforms Zhejiang LaboratoryHangzhou 311100China Yunnan Observatories Chinese Academy of SciencesKunming 650011China Guangxi Key Laboratory for Relativistic Astrophysics Department of PhysicsGuangxi UniversityNanning 530004China

We present the interstellar scintillation analysis of fast radio burst(FRB)20220912A during its extremely active episode in 2022using data from the Five-hundred-meter Aperture Spherical Radio Telescope(faST).We detect a scintillation arc in the FRB’s secondary spectrum,which describes the power in terms of the scattered FRB signals’time delay and Doppler *** arc indicates that the scintillation is caused by a highly localized *** analysis favors a Milky Way origin of the ionized interstellar medium(IISM)for the localized scattering medium but cannot rule out a host galaxy *** present our method for detecting the scintillation arc,which can be applied generally to sources with irregularly spaced bursts or *** methods could help shed light on the complex interstellar environment surrounding the FRBs and in our Galaxy.

关键词： fast radio burst scintillation FRB 20220912A

原发性膀胱大细胞神经内分泌癌伴尿路上皮癌1例报告

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中华泌尿外科杂志 2024年第1期45卷 59-60页

作者：贺贞林刘龙龙陈书练孙发遵义医科大学附属医院泌尿外科遵义563000 遵义医科大学遵义563000

膀胱大细胞神经内分泌癌是一种罕见的恶性肿瘤,恶性程度高,侵袭性强,预后较差。本文报道1例56岁男性患者,因膀胱占位行经尿道膀胱肿瘤电切术,术后病理提示膀胱大细胞神经内分泌癌伴尿路上皮癌,予化疗后行根治性膀胱切除术。术后随访3个... 详细信息

膀胱大细胞神经内分泌癌是一种罕见的恶性肿瘤,恶性程度高,侵袭性强,预后较差。本文报道1例56岁男性患者,因膀胱占位行经尿道膀胱肿瘤电切术,术后病理提示膀胱大细胞神经内分泌癌伴尿路上皮癌,予化疗后行根治性膀胱切除术。术后随访3个月,未见复发与转移。

关键词：膀胱肿瘤神经内分泌癌大细胞神经内分泌癌尿路上皮癌