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Universal paradigm of ternary metacomposites with tunable epsilon-negative and epsilon-near-zero response for perfect electromagnetic shielding

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Rare Metals 2024年第2期43卷 796-809页

作者： Yun-Peng Qu Yun-Lei Zhou Yang Luo Yao Liu Jun-Fei Ding Yan-Li Chen Xiu Gong Jing-Liang Yang qiong Peng xiao-si qi College of Physics Guizhou UniversityGuiyang550025China Hangzhou Institute of Technology Xidian UniversityHangzhou311231China Department of Materials ETH Zurich8093ZurichSwitzerland Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) Shandong UniversityJinan250061China

CaCu_(3)Ti_(4)O_(12)(CCTO)ceramic nanocomposites incorporating graphene–carbon black(GRCB)fillers were fabricated by spark plasma sintering *** percolative effects of conductive GRCB fillers on dielectric response of GRCB/CCTO ternary metacomposites were systematically *** weakly real permittivity(ε′)-negative response(ε′~−1×10^(2))was achieved which originated from weakly low-frequency plasmonic state of free carriers within constructed GRCB *** enhancing three-dimensional GRCB network,the plasma frequency of metacomposites increased while the damping factor ***,theε′-negative values of metacomposites were tuned from−10^(2) to−10^(4) orders of magnitude andε′-near-zero(ENZ)frequencies from~142 to~340 MHz which substantially benefited from the moderate carrier concentration of GRCB dual *** Drude model and equivalent circuit models were adopted to demonstrate dielectric and electrical *** obtained metacomposites show strong EM shielding effect along with enhanced plasmonic oscillation and even better achieving perfect EM shielding effect in ENZ *** work achieves the tunableε′-negative andε′-near-zero response and more importantly clarifies its regulation mechanism in ceramic-based ternary metacomposites,which opens up the possibility of designing high-performance EM shielding materials based on metacomposites.

关键词： Metacomposites Ceramic matrix composites Negative permittivity Epsilon-near-zero Electromagnetic shielding

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基于PINK1/Parkin线粒体自噬通路探讨骨痹方抗膝骨关节炎的机制研究

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湖北中医药大学学报 2024年第4期26卷 13-18页

作者：肖思奇程淼王磊周学平何晓瑾南京中医药大学附属医院/江苏省中医院江苏南京210029 南京中医药大学第一临床医学院江苏南京210023

目的观察骨痹方调控PTEN诱导假定激酶1(PINK1)/E3泛素连接酶(Parkin)线粒体自噬通路抗膝骨关节炎的机制。方法构建双荧光素酶报告基因筛选骨痹方。将软骨细胞随机分为空白组、模型组、阳性药组、骨痹方组。除空白组外其余组均以羰基-氰-... 详细信息

目的观察骨痹方调控PTEN诱导假定激酶1(PINK1)/E3泛素连接酶(Parkin)线粒体自噬通路抗膝骨关节炎的机制。方法构建双荧光素酶报告基因筛选骨痹方。将软骨细胞随机分为空白组、模型组、阳性药组、骨痹方组。除空白组外其余组均以羰基-氰-对-三氟甲氧基苯腙(FCCP)诱导。CCK-8法检测软骨细胞增殖情况。RT-qPCR法检测PINK1、Parkin、微管相关蛋白1轻链3(LC3)、B细胞淋巴瘤-2(Bcl-2)、大分子B淋巴细胞瘤(Bcl-xL)、髓细胞白血病1(Mcl-1)基因表达量。将60只小鼠随机分为假手术组、模型组、阳性药组、骨痹方组,每组15只采用改良Hulth法建立小鼠膝骨关节炎模型造模成功后番红O固绿染色观察软骨组织。Western Blot检测PINK1、Parkin、LC3、Bcl-2、Bcl-xL、Mcl-1蛋白表达量。结果与空白组比较,模型组软骨细胞PINK1、LC3 mRNA表达增加,OD值及Parkin、Bcl-2、Bcl-xL、Mcl-1 mRNA表达降低(P<0.05);与模型组比较,阳性药组和骨痹方组软骨细胞PINK1、LC3 mRNA表达减少,OD值及Parkin、Bcl-2、Bcl-xL、Mcl-1 mRNA表达增加(P<0.05)。与阳性药组比较,骨痹方组软骨细胞PINK1、LC3mRNA表达降低,Parkin、Bcl-2、Bcl-xL、Mcl-1 mRNA表达升高(P<0.05)。与假手术组比较,模型组软骨组织中PINK1、LC3Ⅱ/LC3Ⅰ蛋白表达增加而Parkin、Bcl-2、Bcl-xL、Mcl-1蛋白表达减少(P<0.05);与模型组比较,阳性药组、骨痹方组PINK1、LC3Ⅱ/LC3Ⅰ蛋白表达降低,而Parkin、Bcl-2、Bcl-xL、Mcl-1蛋白表达升高(P<0.05)与阳性药组比较,骨痹方组PINK1、LC3Ⅱ/LC3Ⅰ蛋白表达降低而Parkin、Bcl-2、BclxL、Mcl-1蛋白含量升高(P<0.05)。结论骨痹方可延缓软骨退变其机制可能与抑制PINK1、LC3过度表达激活Parkin同时促进BCL2家族抗凋亡蛋白Bcl-xL、Mcl-1表达增加,阻止PINK1/Parkin复合物过度合成,有效降低过度的线粒体自噬有关。

关键词：膝骨关节炎骨痹方线粒体自噬 PINK1/Parkin 细胞凋亡

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Carbon nanotube-carbon black/CaCu_(3)Ti_(4)O_(12) ternary metacomposites with tunable negative permittivity and thermal conductivity fabricated by spark plasma sintering

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Rare Metals 2023年第12期42卷 4201-4211页

作者： Yun-Peng Qu Hai-Kun Wu Pei-Tao Xie Ni Zeng Yan-Li Chen Xiu Gong Jing-Liang Yang qiong Peng Yu Xie xiao-si qi College of Physics Guizhou UniversityGuiyang 550025China Department of Chemistry City University of Hong KongHong Kong 999077China College of Materials Science and Engineering Qingdao UniversityQingdao 266071China Foshan(Southern China)Institute for New Materials Foshan 528200China Faculty of Science and Engineering Department of MaterialsThe University of ManchesterManchester M139PLUK Department of Mechanical and Electrical Engineering Xiamen UniversityXiamen 361005China

Metacomposites with negative permittivity usually possess huge dielectric loss,showing potential for micro-wave attenuation devices where huge heat would ***,carbon nanotube-carbon black/CaCu_(3-)Ti_(4)O_(12)(CNT-CB/CCTO)ternary metacomposites were fabricated by spark plasma *** CNT-CB dualphase filler was pre-pared through electrostatic selfassembly process in order to construct an effective 3-dimensional(3D)carbon network in CCTO *** percolation threshold of CNT-CB/CCTO composites was identified at filler content of 12.52 wt%which accompanied with an essential change of conduction *** negative permittivity was derived from low-frequency plasmonic state of the 3D carbon network,described by Drude *** problem of heat transport,generally occurring in negative permittivity materials,has been solved and optimized in obtained ternary metacomposites beneftting from the substantially high thermal conductivity(9.49-2.00 W·m^(-1)·K^(-1))and diffusivity(2.74-1.22mm^(2)·s^(-1)).This work could spark significant development of practical application of metacomposites on novel electronic devices and electromagnetic apparatus.

关键词： Metacomposites Ceramic matrix composites Negative permittivity Thermal conductivity

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Association of prealbumin with short-term and long-term outcomes in patients with acute ST-segment elevation myocardial infarction

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Journal of Geriatric Cardiology 2024年第4期21卷 421-430页

作者： Jing TAN Jin si Ke-Ling xiao Ying-Hua ZHANG qi HUA Jing LI Department of Cardiology Xuanwu Hospital Capital Medical UniversityBeijingChina Department of Geriatric Medicine Xuanwu Hospital Capital Medical UniversityNational Clinical Research Center for Geriatric DiseasesBeijingChina

BACKGROUND Prealbumin is considered to be a useful indicator of nutritional status. Furthermore, it has been found to be associated with severities and prognosis of a range of diseases. However, limited data on the association of baseline prealbumin level with outcomes of patients with acute ST-segment elevation myocardial infarction(STEMI) are *** We analyzed 2313 patients admitted for acute STEMI between October 2013 and December 2020. In-hospital outcomes and mortality during the 49 months(interquartile range: 26–73 months) follow-up period were compared between patients with the low prealbumin level(sity score matching, patients with the low prealbumin level than those with the high prealbumin level experienced higher incidences of heart failure with Killip class Ⅲ(9.9%vs. 4.4%, P = 0.034), cardiovascular death(8.4% vs. 3.4%, P = 0.035) and the composite of major adverse cardiovascular events(19.2%vs. 10.3%, P = 0.012). Multivariate logistic regression analysis identified that the low prealbumin level(sitivity = 0.544, specificity = 0.794). However, after multivariate adjustment of possible confounders, baseline prealbumin level(170 mg/L) was no longer independently associated with 49-month cardiovascular death. After propensity score matching, Kaplan-Meier survival curves revealed consistent *** Decreased prealbumin level closely related to unfavorable short-term outcomes. However, after multivariate adjustment and controlling for baseline differences, baseline prealbumin level was not independently assoc

关键词： patients admitted infarction

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Energy-efficient buffer and service rate allocation in manufacturing systems using hybrid machine learning and evolutionary algorithms

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Advances in Manufacturing 2024年第2期12卷 227-251页

作者： si-xiao Gao Hui Liu Jun Ota Key Laboratory of Traffic Safety on Track of Ministry of Education Institute of Artificial Intelligence and Robotics(IAIR)School of Traffic and Transportation EngineeringCentral South UniversityChangsha410075People’s Republic of China Research into Artifacts Center for Engineering School of EngineeringThe University of TokyoTokyoJapan

Currently,simultaneous buffer and service rate allocation is a topic of interest in the optimization of manufacturing *** allocation problems have been solved previously to satisfy economic requirements;however,owing to the progress of green manufacturing,energy conservation and environmental protection have become increasingly ***,an energy-efficient approach is developed to maximize the throughput and minimize the energy consumption of manufacturing systems,subject to the total buffer capacity,total service rate,and predefined energy *** energy-efficient approach integrates the simulated annealing-non-dominated sorting genetic algorithm-II with the honey badger algorithm-histogram-based gradient boosting regression *** former algorithm searches for Pareto-optimal solutions of sufficient *** latter algorithm builds prediction models to rapidly calculate the throughput,energy consumption,and energy *** examples show that the proposed hybrid approach can achieve a better solution quality compared with previously reported ***,the prediction models can rapidly evaluate manufacturing systems with sufficient *** study benefits the multi-objective optimization of green manufacturing systems.

关键词： Energy-efficient allocation Multi-objective optimization Energy efficiency Energy consumption Machine learning

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Development of a high-repetition-rate lumped-inductance kicker magnet prototype for the beam switchyard of SHINE

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Nuclear Science and Techniques 2024年第2期35卷 20-31页

作者： Yong-Fang Liu Rui-Ping Wang Jin Tong Bo Zhang si Chen qi-Bing Yuan Hai-xiao Deng Ming Gu Bo Liu Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201412People’s Republic of China

The Shanghai high-repetition-rate X-ray free-electron laser and extreme light facility(SHINE)operates at a maximum repetition rate of 1 *** magnets are key components that distribute electron bunches into three different undulator lines in a bunch-by-bunch *** kicker field width must be less than the time interval between bunches.A lumpedinductance kicker prototype was developed using a vacuum chamber with a single-turn *** full magnetic field strength was 0.005 *** paper presents the requirements,design considerations,design parameters,magnetic field calculations,and measurements of the kicker *** relevant experimental results are also *** pulse width of the magnetic field was approximately 600 ns,and the maximum operation repetition rate was 1 *** developed kicker satisfies the requirements for the SHINE ***,numerous recommendations for the future optimization of kicker magnets are provided.

关键词： X-ray free-electron laser Kicker magnet Beam switchyard High repetition rate Ni-Zn ferrites

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Construction and validation of a pancreatic cancer prognostic model based on genes related to the hypoxic tumor microenvironment

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World Journal of Gastroenterology 2024年第36期30卷 4057-4070页

作者： Fan Yang Na Jiang xiao-Yu Li Xing-si qi Zi-Bin Tian Ying-Jie Guo Department of Gastroenterology The Affiliated Hospital of Qingdao UniversityQingdao 266000Shandong ProvinceChina

BACKGROUND Pancreatic cancer is one of the most lethal malignancies,characterized by poor prognosis and low survival *** prognostic factors for pancreatic cancer offer inadequate predictive accuracy,often failing to capture the complexity of the *** hypoxic tumor microenvironment has been recognized as a significant factor influencing cancer progression and resistance to *** study aims to develop a prognostic model based on key hypoxia-related molecules to enhance prediction accuracy for patient outcomes and to guide more effective treatment strategies in pancreatic *** To develop and validate a prognostic model for predicting outcomes in patients with pancreatic cancer using key hypoxia-related *** This pancreatic cancer prognostic model was developed based on the expression levels of the hypoxia-associated genes CAPN2,PLAU,and *** results were validated in an independent *** study also examined the correlations between the model risk score and various clinical features,components of the immune microenvironment,chemotherapeutic drug sensitivity,and metabolism-related ***-time quantitative PCR verification was conducted to confirm the differential expression of the target genes in hypoxic and normal pancreatic cancer cell *** The prognostic model demonstrated significant predictive value,with the risk score showing a strong correlation with clinical features:It was significantly associated with tumor grade(G)(bPsignificantly correlated with residual tumor(R)status(bPsignificant negative correlation between the risk score and the half-maximal inhibitory concentration of some chemotherapeutic ***,the risk score was linked to the enrichment of metabolism-related pathways in pancreatic *** The prognostic model based on hypoxia-related genes effectively predicts pancreati

关键词： Pancreatic cancer Hypoxia Prognostic model Immune microenvironment Metabolism pathway

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Experimental quantum state compression from two identical qubits to a qutrit

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Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 1-5页

作者： qiao Xu Lin-Xiang Zhou Tian-Feng Feng Shang-Feng qiu si-Wu Li Wu-Ji Zhang Hui Luo xiao-qi Zhou State Key Laboratory of Optoelectronic Materials and Technologies and School of Physics Sun Yat-sen UniversityGuangzhou 510000China Hefei National Laboratory Hefei 230088China

In the realm of modern information technology,data compression technology occupies a pivotal *** advancements in quantum information technology,the need to compress large-scale qubits ensembles has become urgent,aiming to reduce the demand on quantum storage ***,existing quantum state compression schemes generally face a limitation:the particles before and after compression must reside in the same dimensional *** specific scenarios,compressing qubits into particles of higher dimensions not only enhances the efficiency of quantum state compression but also further reduces the usage of quantum storage *** we experimentally demonstrated a quantum state compression between particles of different dimensions,successfully compressing two qubits into a single *** average fidelity of the resulting qutrit with the ideal quantum state is *** study may have potential applications in future quantum information,such as increasing quantum communication bandwidth and reducing storage resource consumption in quantum computing.

关键词： quantum state compression quantum information technology optics

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Atomically dispersed calcium as solid strong base catalyst with high activity and stability

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Green Energy & Environment 2024年第10期9卷 1619-1626页

作者： Xiang-Bin Shao Zhi-Wei Xing si-Yu Liu Ke-Xin Miao Shi-Chao qi Song-Song Peng xiao-qin Liu Lin-Bing Sun State Key Laboratory of Materials-Oriented Chemical Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)College of Chemical EngineeringNanjing Tech University30 South Puzhu Road

Solid strong base catalysts are highly attractive for diverse reactions owing to their advantages of neglectable corrosion,facile separation,and environmental ***,their widespread applications are impeded by basic components aggregation and low *** this work,we fabricate single calcium atoms on graphene （denoted as Ca1/G） by use of a redox strategy for the first time,producing solid strong base catalyst with high activity and *** precursor Ca（NO3）2is first reduced to CaO at 400℃ by the support graphene,forming CaO/G with conventional basic sites,and the subsequent reduction at 850℃ results in the generation of Ca1/G with atomically dispersed *** characterizations reveal that Ca single atoms are anchored on graphene in tetra-coordination （Ca–C2–N2） where N is in situ doped from Ca（NO3）*** atomically dispersed Ca,along with their anchoring on the support,endow Ca1/G with high activity and stability toward the transesterification reaction of ethylene carbonate with *** turnover frequency value reaches 128.0 h-1on Ca1/G,which is much higher than the traditional counterpart CaO/G and various reported solid strong bases (2.9–46.2 h-1).Moreover,the activity of Ca1/G is well maintained during 5 cycles,while 60% of activity is lost for the conventional analogue CaO/G due to the leaching of Ca.

关键词： Solid strong base single Ca atoms Heterogeneous catalysts Transesterification Reaction

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Ramsey Numbers of Trees Versus Multiple Copies of Books

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Acta Mathematicae Applicatae sinica 2024年第3期40卷 600-612页

作者： xiao-bing GUO si-nan HU Yue-jian PENG School of Mathematical Sciences Luoyang Normal UniversityLuoyang 471934China School of Mathematics Hunan UniversityChangsha 410082China

Given two graphs G and H,the Ramsey number R(G,H) is the minimum integer N such that any two-coloring of the edges of K_(N) in red or blue yields a red G or a blue *** v(G) be the number of vertices of G and χ(G) be the chromatic number of *** s(G) denote the chromatic surplus of G,the number of vertices in a minimum color class among all proper χ(G)-colorings of *** showed that R(G,H)≥(v(G)-1)(χ(H)-1)+s(H) if G is connected and v(G)≥s(H).A connected graph G is H-good if R(G,H)=(v(G)-1)(χ(H)-1)+s(H).Let tH denote the disjoint union of t copies of graph H,and let G∨H denote the join of G and *** a complete graph on n vertices by K_(n),and a tree on n vertices by T_(n).Denote a book with n pages by B_(n),i.e.,the join K_(2) ∨■.Erd?s,Faudree,Rousseau and Schelp proved that T_(n) is B_(m)-good if n≥*** this paper,we obtain the exact Ramsey number of T_(n) versus 2B_(2).Our result implies that T_(n) is 2B_(2)-good if n≥5.

关键词： ramsey number ramsey goodness tree book

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