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Towards the performance limit of catenary meta-optics via field-driven optimization

Opto-Electronic Advances 2024年第5期7卷 33-42页

作者： Siran Chen Yingli ha Fei Zhang Mingbo Pu hanlin Bao Mingfeng Xu Yinghui Guo Yue Shen Xiaoliang ma Xiong Li Xiangang Luo National Key Laboratory of Optical Field manipulation Science and Technology Chinese Academy of SciencesChengdu 610209China State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China College of materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049China Research Center on Vector Optical Fields Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China Department of Electrical and Computer Engineering University of California Los Angeles(UCLA)Los AngelesCalifornia 90095USA

Catenary optics enables metasurfaces with higher efficiency and wider bandwidth,and is highly anticipated in the imaging system,super-resolution lithography,and broadband ***,the periodic boundary approximation without considering aperiodic electromagnetic crosstalk poses challenges for catenary optical devices to reach their performance ***,perfect control of both local geometric and propagation phases is realized through field-driven optimization,in which the field distribution is calculated under real boundary *** from other optimization methods requiring a mass of iterations,the proposed design method requires less than ten iterations to get the efficiency close to the optimal *** on the library of shape-optimized catenary structures,centimeter-scale devices can be designed in ten seconds,with the performance improved by ~15%.Furthermore,this method has the ability to extend catenary-like continuous structures to arbitrary polarization,including both linear and elliptical polarizations,which is difficult to achieve with traditional design *** provides a way for the development of catenary optics and serves as a potent tool for constructing high-performance optical devices.

关键词： catenary optics catenary structures field-driven optimization

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A new method for evaluating wedges of steel plates and strips

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Journal of Iron and Steel Research(International) 2024年第7期31卷 1719-1735页

作者： Xiao-bao ma Xiao-xin ma Tao Wang Zhong-kai Ren Yu-cheng Ren College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024ShanxiChina Ministry of Education Engineering Research Center of Advanced Metal Composite Forming Technology and Equipment Taiyuan University of TechnologyTaiyuan 030024ShanxiChina National Key Laboratory of Metal Forming Technology and Heavy Equipment Taiyuan University of TechnologyTaiyuan 030024ShanxiChina China National Heavy machinery Research Institute Co. Ltd.Xi'an 710018ShaanxiChina Faculty of Mechanical Engineering Hebei University of ArchitectureZhangjiakou 075000HebeiChina

To overcome the inaccuracy problem of the traditional wedge evaluation of steel plates and strips caused by the ran-domness of the thicknesses of two local points and improve the reliability of the wedge index,the double-centroid method for the wedge evaluation was proposed,and a model based on the centroid theory was ***,an integral model for the discrete thickness values of the cross-section profiles was *** discussion focused on the distinct characteristics of the two-point method,asymmetric method,and double-centroid method in evaluating the asymmetric distribution of *** three methods were employed to evaluate the wedge values of both the theoretical and measured cross-sections of steel plates and strips,and the accuracies of three wedge evaluation models were analyzed and *** results showed that the double-centroid method objectively reflects the degree and variation characteristics of the wedge values of the cross-sections of steel plates and strips,and this method is feasible,reliable,and outstanding.

关键词： Steel plate and strip Wedge Two-point method Double-centroid method Reliability

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白花蛇舌草提取物通过AMPK/ATG5信号通路对急性胰腺炎大鼠肺损伤的保护作用机制研究

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中国免疫学杂志 2024年第2期40卷 348-354页

作者：哈宗兰马丽娜马琼甘桂芬青海大学附属医院重症医学科西宁810000 青海大学附属医院放射科西宁810000

目的:通过5’-单磷酸腺苷活化蛋白激酶(AMPK)/自噬相关蛋白5(ATG5)信号通路,探讨白花蛇舌草提取物减轻急性胰腺炎(AP)大鼠肺损伤的机制。方法:建立AP肺损伤大鼠模型,随机分为模型组、提取物(白花蛇舌草提取物)组、3-ma(自噬抑制剂3-甲... 详细信息

目的:通过5’-单磷酸腺苷活化蛋白激酶(AMPK)/自噬相关蛋白5(ATG5)信号通路,探讨白花蛇舌草提取物减轻急性胰腺炎(AP)大鼠肺损伤的机制。方法:建立AP肺损伤大鼠模型,随机分为模型组、提取物(白花蛇舌草提取物)组、3-ma(自噬抑制剂3-甲基腺嘌呤)组、AICAR(AMPK激活剂)组、提取物+AICAR组,每组15只,另取15只大鼠作为假手术组;ELISA检测血清淀粉酶(AMY)、IL-1β、IL-6、IL-18水平;检测大鼠腹水量及肺湿/干重比(W/D);HE观察胰腺及肺组织病理损伤;Western blot检测溶酶体相关膜蛋白2(LAMP2)、自噬底物p62、IL-1β前体蛋白(pro-IL-1β)、胰蛋白酶原活化肽(TAP)、AMPK、p-AMPK、ATG5、自噬标志物LC3-Ⅱ/Ⅰ、泛素特异性蛋白酶10(UPS10)表达。结果:与假手术组相比,模型组大鼠腹水量、肺W/D、胰腺和肺组织病理损伤评分、血清AMY、IL-1β、IL-6、IL-18水平、胰腺组织p62、TAP、pro-IL-1β表达、肺组织pAMPK/AMPK、ATG5、LC3-Ⅱ/Ⅰ、UPS10、pro-IL-1β表达均升高(Pma干预后,上述指标均得到显著改善(Pma(P<0.05);而AMPK激活剂AICAR可削弱白花蛇舌草提取物对AP大鼠肺损伤的改善作用(P<0.05)。结论:白花蛇舌草提取物可通过抑制AMPK/ATG5信号通路减轻炎症反应、降低自噬水平改善AP大鼠肺损伤。

关键词：白花蛇舌草提取物胰腺炎肺损伤 5’-单磷酸腺苷活化蛋白激酶自噬相关蛋白5 炎症-自噬

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Synthesis of waterborne polyurethane-humic acid cross-linked biomass porous materials for the adsorption of methylene blue

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Chinese Journal of Chemical Engineering 2024年第3期67卷 27-38页

作者： Shanghong ma Jianbo Qu haitao Zhang Xiubin Cui Peng Ye Qingfei Hu Mingzhen Chao State Key Laboratory of Biobased material and Green Papermaking Qilu University of TechnologyShandong Academy of SciencesJinan 250353China Faculty of Light Industry Qilu University of TechnologyShandong Academy of SciencesJinan 250353China

A series of adsorbent materials(WPU-hax-y)with a three-dimensional porous structure,green sustainability,and excellent performance were prepared and evaluated for the removal of methylene blue using nontoxic and environmentally friendly waterborne polyurethane as the matrix material and humic acid,a biomass material,as the functional *** newly synthesized adsorbents were characterized by infrared spectroscopy,scanning electron microscopy,specific surface area,and *** effects of contact time(0-8 h),starting concentration(10-100 mg·L^(-1)),pH(3-11),solution temperature(30-60℃),and coexisting ions(Ca2+,Na+,K+,Mg2+)on the performance were ***-first-order,pseudo-second-order,elovich,and intra-particle diffusion models were used to analyze the adsorption kinetics;the Langmuir,Freundlich,Temkin,and Dubin-Radushkovich adsorption isotherms were evaluated;and the adsorption behavior of the adsorbent materials was found to be more appropriate for the pseudo-second-order model for chemical pollutant removal than the Langmuir model,which depends on monolayer ***-ha2-3 stood out with a maximum adsorption capacity of 813.0081 mg·g^(-1) fitted to the pseudo-second-order and 309.2832 mg·g^(-1) fitted to the Langmuir model,showing superior adsorption performance and regenerability.

关键词： Porous media Bioenergy Sustainability Waste water

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Surface engineering of ZnO electrocatalyst by N doping towards electrochemical CO_(2) reduction

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Journal of Energy Chemistry 2024年第1期88卷 71-81,I0002页

作者： Rohini Subhash Kanase Getasew Mulualem Zewdie maheswari Arunachalam Jyoti Badiger Suzan Abdelfattah Sayed Kwang-Soon Ahn Jun-Seok ha Uk Sim Hyeyoung Shin Soon Hyung Kang Department of Interdisciplinary Program for Photonic Engineering Chonnam National UniversityGwangju 61186Republic of Korea Graduate School of Energy Science and Technology(GEST) Chungnam National University99 Daehak-roYuseong-guDaejeon 34134Republic of Korea Department of Chemistry Education and Optoelectronic Convergence Research Center Chonnam National UniversityGwangju 61186Republic of Korea Department of Advanced Chemicals and Engineering Chonnam National UniversityGwangju 61186Republic of Korea School of Chemical Engineering Yeungnam UniversityGyeongsan 38541Republic of Korea Department of Energy Engineering Korea Institute of Energy Technology(KENTECH)Naju 58217Republic of Korea

The discovery of efficient,selective,and stable electrocatalysts can be a key point to produce the largescale chemical fuels via electrochemical CO_(2) reduction(ECR).In this study,an earth-abundant and nontoxic ZnO-based electrocatalyst was developed for use in gas-diffusion electrodes(GDE),and the effect of nitrogen(N)doping on the ECR activity of ZnO electrocatalysts was ***,a ZnO nanosheet was prepared via the hydrothermal method,and nitridation was performed at different times to control the N-doping *** an increase in the N-doping content,the morphological properties of the nanosheet changed significantly,namely,the 2D nanosheets transformed into irregularly shaped ***,the ECR performance of Zn O electrocatalysts with different N-doping content was assessed in 1.0 M KHCO_(3) electrolyte using a gas-diffusion electrode-based ECR *** the ECR activity increased after a small amount of N doping,it decreased for higher N doping *** them,the N:ZnO-1 h electrocatalysts showed the best CO selectivity,with a faradaic efficiency(FE_(CO))of 92.7%at-0.73 V *** hydrogen electrode(RHE),which was greater than that of an undoped Zn O electrocatalyst(FE_(CO)of 63.4%at-0.78 V_(RHE)).Also,the N:ZnO-1 h electrocatalyst exhibited outstanding durability for 16 h,with a partial current density of-92.1 ma cm^(-2).This improvement of N:ZnO-1 h electrocatalyst can be explained by density functional theory calculations,demonstrating that this improvement of N:ZnO-1 h electrocatalyst comes from(ⅰ)the optimized active sites lowering the free energy barrier for the rate-determining step(RDS),and(ⅱ)the modification of electronic structure enhancing the electron transfer rate by N doping.

关键词： ZnO N-doped ZnO Gas-diffusion electrode CO Selectivity Electrochemical CO_(2)reduction

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Improving chitosan-based composite membrane by introducing a novel hybrid functional nano-hydroxyapatite with carboxymethyl cellulose and phytic acid

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Frontiers of Chemical Science and Engineering 2024年第6期18卷 1-15页

作者： Liuyun Jiang Yingjun ma Shuo Tang Yuqing Wang Yan Zhang Shengpei Su Xiang Hu Jun He National&Local Joint Engineering Laboratory for New Petro-chemical materials and Fine Utilization of Resources Key Laboratory of Chemical Biology&Traditional Chinese Medicine Research(Ministry of Education)College of Chemistry and Chemical EngineeringHunan Normal UniversityChangsha 410081China State Key Laboratory Developmental Biology of Freshwater Fish School of Life ScienceHunan Normal UniversityChangsha 410081China Hunan Provincial Key Laboratory of Regional Hereditary Birth Defects Prevention and Control Changsha Hospital for Matemal&Child Health Care Aiffiliated to Hunan Normal UniversityChangsha 410081China

A functional hybrid nano-hydroxyapatite(carboxymethyl cellulose-phytic acid-n-ha,CMC-PA-n-ha)was prepared by adding CMC and *** results of Fourier transformation infrared spectra,X-ray diffraction,thermal gravimetric analysis and dispersion experiments indicated that the addition of CMC and PA affected the morphology,crystallinity and crystal size of hybrid n-ha,and CMC endowed hybrid n-ha with excellent *** electron microscope results showed that CMC-PA-n-ha nanoparticle could be uniformly dispersed in chitosan(CS)matrix to obtain composite membrane by casting technology,so that the highest tensile strength of CMC-PA-n-ha/CS composite membrane was 69.64%and 144.45%higher than that of CS membrane and n-ha/CS composite membrane,*** angle test showed that CMC-PA-n-ha effectively improved hydrophilicity of the CS *** simulated body fluid immersion results indicated that the CMC-PA-n-ha/CS composite membrane not only exhibited good degradability but also promoted bone-like apatite *** cell proliferation experiments proved that the introduction of PA made the composite membrane have better cell adhesion and proliferation *** tests demonstrated that PA could effectively improve the antibacterial properties of the composite membrane,which is expected to be applied as guide bone tissue regeneration membrane.

关键词： nano-hydroxyapatite chitosan dispersion guide bone tissue regeneration membrane

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Mutual antagonism of mouse-adaptation mutations in ha and PA proteins on H9N2 virus replication

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Virologica Sinica 2024年第1期39卷 56-70页

作者： Liping ma Huabin Zheng Xianliang Ke Rui Gui Zhongzi Yao Jiasong Xiong Quanjiao Chen CAS Key Laboratory of Special Pathogens and Biosafety Wuhan Institute of VirologyChinese Academy of SciencesWuhan430207China Center for Biosafety Mega-Science Wuhan Institute of VirologyChinese Academy of SciencesWuhan430207China Hubei Jiangxia Laboratory Wuhan430207China University of Chinese Academy of Sciences Beijing100049China

Avian H9N2 viruses have wide host range among the influenza A ***,knowledge of H9N2 mammalian adaptation is *** explore the molecular basis of the adaptation to mammals,we performed serial lung passaging of the H9N2 strain A/chicken/Hunan/8.27 YYGK3W3-OC/2018(3W3)in mice and identified six mutations in the hemagglutinin(ha)and polymerase acidic(PA)*** L226Q,T511I,and A528V of ha were responsible for enhanced pathogenicity and viral replication in mice;notably,ha-L226Q was the key *** T97I,I545V,and S594G of PA contributed to enhanced polymerase activity in mammalian cells and increased viral replication levels in vitro and in ***-T97I increased viral polymerase activity by accelerating the viral polymerase complex *** findings revealed that the viral replication was affected by the presence of PA-97I and/or PA-545V in combination with a triple-point ha ***,the double-and triple-point PA mutations demonstrated antagonistic effect on viral replication when combined with ***,any combination of PA mutations,along with double-point ha mutations,resulted in antagonistic effect on viral *** also observed antagonism in viral replication between PA-545V and PA-97I,as well as between ha-528V and *** findings demonstrated that several antagonistic mutations in ha and PA proteins affect viral replication,which may contribute to the H9N2 virus adaptation to mice and mammalian *** findings can potentially contribute to the monitoring of H9N2 field strains for assessing their potential risk in mammals.

关键词： Influenza Avirus(IAV) H9N2 ha PA Antagonism Mouse adaptation

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The evolution,pathogenicity and transmissibility of quadruple reassortant H1N2 swine influenza virus in China:A potential threat to public health

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Virologica Sinica 2024年第2期39卷 205-217页

作者： Xinxin Cui Jinhuan ma Zifeng Pang Lingzhi Chi Cuishan mai hanlin Liu Ming Liao hailiang Sun College of Veterinary Medicine South China Agricultural UniversityGuangzhou510642China Key Laboratory of Zoonosis Control and Prevention of Guangdong Province South China Agricultural UniversityGuangzhou510642China National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control South China Agricultural UniversityGuangzhou510642China Shandong Vocational Animal Science and Veterinary College Weifang261061China Institute of Animal Health Guangdong Academy of Agricultural SciencesGuangzhou510640China

Swine are regarded as“intermediate hosts”or“mixing vessels”of influenza viruses,capable of generating strains with pandemic *** 2020 to 2021,we conducted surveillance on swine H1N2 influenza(swH1N2)viruses in swine farms located in Guangdong,Yunnan,and Guizhou provinces in southern China,as well as Henan and Shandong provinces in northern *** systematically analyzed the evolution and pathogenicity of swH1N2 isolates,and characterized their replication and transmission *** isolated viruses are quadruple reassortant H1N2 viruses containing genes from pdm/09 H1N1(PB2,PB1,PA and NP genes),triple-reassortant swine(NS gene),Eurasian Avian-like(ha and M genes),and recent human H3N2(NA gene)*** NA,PB2,and NP of SW/188/20 and SW/198/20 show high gene similarities to A/Guangdong/Yue Fang277/2017(H3N2).The ha gene of swH1N2 exhibits a high evolutionary *** five swH1N2 isolates replicate efficiently in human,canine,and swine cells,as well as in the turbinate,trachea,and lungs of mice.A/swine/Shandong/198/2020 strain efficiently replicates in the respiratory tract of pigs and effectively transmitted among ***,these current swH1N2 viruses possess zoonotic potential,highlighting the need for strengthened surveillance of swH1N2 viruses.

关键词： Swine influenza virus(SIV) H1N2 Evolution Replication Pathogenicity Zoonotic potential

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Atmospheric nitrogen deposition affects forest plant and soil system carbon:nitrogen:phosphorus stoichiometric flexibility:A meta-analysis

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Forest Ecosystems 2024年第3期11卷 307-317页

作者： Xiyan Jiang Xiaojing Wang Yaqi Qiao Yi Cao Yan Jiao An Yang Mengzhou Liu Lei ma Mengya Song Shenglei Fu Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions College of Geography and Environmental ScienceHenan UniversityKaifeng475004China Henan Key Laboratory of Integrated Air Pollution Control and Ecological Security College of Geography and Environmental ScienceHenan UniversityKaifeng475004China Henan Dabieshan National Field Observation and Research Station of Forest Ecosystem Henan UniversityZhengzhou450046China

Background:Nitrogen(N)deposition affects forest stoichiometric flexibility through changing soil nutrient availability to influence plant ***,the effect of N deposition on the flexibility of carbon(C),N,and phosphorus(P)in forest plant-soil-microbe systems remains ***:We conducted a meta-analysis based on 751 pairs of observations to evaluate the responses of plant,soil and microbial biomass C,N and P nutrients and stoichiometry to N addition in different N intensity(050,50–100,>100 kg·ha^(-1)·year^(-1)of N),duration(0–5,>5 year),method(understory,canopy),and matter(ammonium N,nitrate N,organic N,mixed N).Results:N addition significantly increased plant N:P(leaf:14.98%,root:13.29%),plant C:P(leaf:6.8%,root:25.44%),soil N:P(13.94%),soil C:P(10.86%),microbial biomass N:P(23.58%),microbial biomass C:P(12.62%),but reduced plant C:N(leaf:6.49%,root:9.02%).Furthermore,plant C:N:P stoichiometry changed significantly under short-term N inputs,while soil and microorganisms changed drastically under high N *** N addition primarily affected plant C:N:P stoichiometry through altering plant N content,while understory N inputs altered more by influencing soil C and P *** N significantly influenced plant and soil C:N and C:P,while ammonia N changed plant N:*** C:P and soil C:N were strongly correlated with mean annual precipitation(maT),and the C:N:P stoichiometric flexibility in soil and plant under N addition connected with soil ***,N addition decoupled the correlations between soil microorganisms and the ***:N addition significantly increased the C:P and N:P in soil,plant,and microbial biomass,reducing plant C:N,and aggravated forest P ***,these impacts were contingent on climate types,soil layers,and N input *** findings enhance our comprehension of the plant-soil system nutrient cycling mechanisms in forest ecosystems and plant strategy responses to N deposition.

关键词： C:N:P stoichiometry Meta-analysis Forest ecosystem Nitrogen addition form Nutrient cycles

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激励共谋

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清华金融评论 2024年第6期 95-98页

作者：马芳原北京大学汇丰商学院

在产品市场中,“共谋”是指竞争者之间通过明确的协定或暗中的默契,共同实施限制竞争的策略,以期实现生产者的利润最大化。当企业的股东为了增强利润回报而偏好共谋策略时,他们是否会设计精巧的薪酬激励机制,从而激励企业的管理者加入... 详细信息

在产品市场中,“共谋”是指竞争者之间通过明确的协定或暗中的默契,共同实施限制竞争的策略,以期实现生产者的利润最大化。当企业的股东为了增强利润回报而偏好共谋策略时,他们是否会设计精巧的薪酬激励机制,从而激励企业的管理者加入并推进共谋策略的实施?论文《激励共谋》(Motivating Collusion)对该问题进行了深入探讨和实证检验。

关键词：薪酬激励机制利润回报利润最大化限制竞争实证检验竞争者激励共谋

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