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The Bright Single Pulse Emission from PSR B1133+16

Research in Astronomy and Astrophysics 2024年第4期24卷 253-261页

作者： Jun Tan zhi-Gang Wen Zhen Wang xue-Feng Duan Hong-Guang Wang Na Wang Vishal Gajjar Jian-Ping Yuan Rai Yuen Wen-Ming Yan Jian-Ling Chen Wei Han Hui Wang Cheng-Bing Lyu Ai-Jun Dong Maths and Information Technology School Yuncheng UniversityYuncheng 044000China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Xinjiang Key Laboratory of Radio Astrophysics Urumqi 830011China School of Physics and Materials Science Guangzhou UniversityGuangzhou 510006China Space Science Laboratory University of CaliforniaBerkeley 94710USA Department of Physics and Electronic Engineering Yuncheng UniversityYuncheng 044000China School of Physics and Electronic Science Guizhou Normal UniversityGuiyang 550025China

We have conducted a comprehensive investigation into the bright single pulse emission from PSR B1133+16using the Giant Metrewave Radio *** time resolution data(61μs)were obtained at a center frequency of 32. MHz with a bandwidth of 32.MHz over a continuous observation period of 7.45 hr.A total of 1082.bright pulses were sporadically detected with peak flux densities ranging from 10 to 2. times stronger than the average pulse ***,no giant pulse-like emission with a relative pulse energy larger than 10 and extremely short duration was detected,indicating that these bright pulses cannot be categorized as giant pulse *** majority of these bright pulses are concentrated in pulse phases at both the leading and trailing windows of the average pulse profile,with an occurrence ratio of approximately *** pulse energy distribution for all individual pulses can be described by a combination of two Gaussian components and a cutoff power-law with an index of α=-*** updated nulling fraction of 15.35%±0.45% was determined from the energy *** emission of individual pulses follows a log-normal distribution in peak flux density *** is imperative that regular phase drifting in bright pulse sequence is identified in both the leading and trailing components for the first *** physical mechanisms are discussed in detail to provide insights into these observations.

关键词： (stars:)pulsars:general (stars:)pulsars:individual(PSR B1133+16) methods:observational methods:data analysis

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利用褐铁矿型红土镍矿烧结矿制备Fe-Cr-Ni合金

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Journal of Central South University 2024年第5期31卷 1494-1506页

作者：薛钰霄朱德庆潘建游志雄吕学伟 College of Materials Science and Engineering Chongqing UniversityChongqing 400044China School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China

我国是不锈钢第一生产大国,但作为冶炼不锈钢主要原料的镍矿及铬铁矿资源贫乏,占红土镍矿资源总量60%以上的褐铁矿型红土镍矿与低品位铬铁矿愈发受到关注。同时,不锈钢冶炼通常需先分别生产铬铁和镍铁,工艺流程长,生产成本高。因此,本... 详细信息

我国是不锈钢第一生产大国,但作为冶炼不锈钢主要原料的镍矿及铬铁矿资源贫乏,占红土镍矿资源总量60%以上的褐铁矿型红土镍矿与低品位铬铁矿愈发受到关注。同时,不锈钢冶炼通常需先分别生产铬铁和镍铁,工艺流程长,生产成本高。因此,本文基于烧结—高炉工艺,利用褐铁矿型红土镍矿烧结矿低成本地一步制备出了Fe-Cr-Ni合金。通过热力学分析及熔炼参数的优化,重点研究了不同Cr_(2.O_(3)含量的含镍烧结矿(S1:4.84 wt%;S3:7.72.wt%)的熔炼特性。在熔炼时间60 min(S1)/90 min (S3)、熔炼温度1600℃、焦粉用量2. wt%、炉渣碱度1.0的最佳条件下,成功制备出了铬品位5.6 wt%~9.3 wt%、镍品位1.55 wt%~1.70 wt%、铁品位84 wt%~88 wt%的Fe-Cr-Ni合金,其铬、镍和铁的回收率分别在90%、98%和96%以上。研究表明,含镍烧结矿Cr_(2.O_(3)含量的提高会造成熔炼时间的延长,这不利于焦比的降低与不锈钢产量的提高。在后续研究中,将开发出由含镍烧结矿与含铬球团矿构成的综合炉料结构,以更有效地实现高铬镍铁的冶炼。

关键词：熔炼特性褐铁矿型红土镍矿烧结矿 Fe-Cr-Ni合金渣铁分离

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Minocycline in the eradication of Helicobacter pylori infection: A systematic review and meta-analysis

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World Journal of Gastroenterology 2024年第17期30卷 2354-2368页

作者： Kai Zhou Cai-Ling Li Hua Zhang Bao-Jun Suo Yu-Xin Zhang Xin-Lu Ren Yu-Xin Wang Chang-Min Mi Ling-Ling Ma Li-Ya Zhou xue-Li Tian zhi-Qiang Song Department of Gastroenterology Peking University Third HospitalBeijing 100191China

BACKGROUND Difficulty in obtaining tetracycline,increased adverse reactions,and relatively complicated medication methods have limited the clinical application of the classic bismuth quadruple ***,the search for new alternative drugs has become one of the research *** recent years,minocycline,as a semisynthetic tetracycline,has demonstrated good potential for eradicating Helicobacter pylori(***)infection,but the systematic evaluation of its role remains *** To explore the efficacy,safety,and compliance of minocycline in eradicating *** *** We comprehensively retrieved the electronic databases of PubMed,Embase,Web of Science,China National Knowledge Infrastructure,SinoMed,and Wanfang database as of October 30,2.2.,and finally included 2. research reports on *** eradication with minocycline-containing regimens as per the inclusion and exclusion *** eradication rates of *** were calculated using a fixed or a random effect model,and the heterogeneity and publication bias of the studies were *** The single-arm meta-analysis revealed that the minocycline-containing regimens achieved good overall *** eradication rates,reaching 82.3%[95%confidence interval(CI):79.7%-85.1%]in the intention-to-treat analysis and 90.0%(95%CI:87.7%-92.4%)in the per-protocol *** overall safety and compliance of the minocycline-containing regimens were good,demonstrating an overall incidence of adverse reactions of 36.5%(95%CI:31.5%-42.2.).Further by traditional meta-analysis,the results showed that the minocycline-containing regimens were not statistically different from other commonly used eradication regimens in eradication rate and incidence of adverse *** of the adverse reactions were mild to moderate and well-tolerated,and dizziness was relatively prominent in the minocycline-containing regimens(16%).CONCLUSION The minocycline-containing regimens demonstrated good efficacy,safety,and

关键词： Helicobacter pylori Minocycline Eradication Safety Resistance

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Genomic data and ecological niche modeling reveal an unusually slow rate of molecular evolution in the Cretaceous Eupteleaceae

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Science China(Life Sciences) 2024年第4期67卷 803-816页

作者： Kun-Li Xiang Sheng-Dan Wu Lian Lian Wen-Chuang He Dan Peng Huan-Wen Peng Xiao-Ni Zhang Hong-Lei Li Jia-Yu xue Hong-Yan Shan Gui-Xia Xu Yang Liu zhi-Qiang Wu Wei Wang State Key Laboratory of Plant Diversity and Specialty Crops Institute of BotanyChinese Academy of SciencesBeijing 100093China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureKey Laboratory of Synthetic BiologyLaboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China China National Botanical Garden Beijing 100093China State Key Laboratory of Grassland Agro-Ecosystems and College of Ecology Lanzhou UniversityLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China College of Landscape Architecture and Life Science/Institute of Special Plants Chongqing University of Arts and SciencesChongqing 402160China College of Horticulture Academy for Advanced Interdisciplinary StudiesNanjing Agricultural UniversityNanjing 210095China Fairylake Botanical Garden Shenzhen&Chinese Academy of SciencesShenzhen 518004China

Living fossils are evidence of long-term sustained ecological ***,whether living fossils have little molecular changes remains poorly known,particularly in ***,we have introduced a novel method that integrates phylogenomic,comparative genomic,and ecological niche modeling analyses to investigate the rate of molecular evolution of Eupteleaceae,a Cretaceous relict angiosperm family endemic to East *** assembled a high-quality chromosome-level nuclear genome,and the chloroplast and mitochondrial genomes of a member of Eupteleaceae(Euptelea pleiosperma).Our results show that Eupteleaceae is most basal in Ranunculales,the earliest-diverging order in eudicots,and shares an ancient whole-genome duplication event with the other *** document that Eupteleaceae has the slowest rate of molecular changes in the observed *** unusually low rate of molecular evolution of Eupteleaceae across all three independent inherited genomes and genes within each of the three genomes is in association with its conserved genome architecture,ancestral woody habit,and conserved niche *** findings reveal the evolution and adaptation of living fossil plants through large-scale environmental change and also provide new insights into early eudicot diversification.

关键词： conservation genomics eudicots evolutionary rates niche conservatism phylogenomics

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Comparative analysis of two digestive tract reconstruction methods in total laparoscopic radical total gastrectomy

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World Journal of Gastrointestinal Surgery 2024年第4期16卷 1109-1120页

作者： Tian-Xiang Dong Dong Wang Qun Zhao zhi-Dong Zhang xue-Feng Zhao Bi-Bo Tan Yu Liu Qing-Wei Liu Pei-Gang Yang Ping-An Ding Tao Zheng Yong Li Zi-Jing Liu Third Department of Surgery of the Fourth Hospital of Hebei Medical University Hebei Key Laboratory of Precision Diagnosis and Comprehensive Treatment of Gastric CancerShijiazhuang 050011Hebei ProvinceChina

BACKGROUND The incidence of gastric cancer has significantly increased in recent *** resection is the main treatment,but the method of digestive tract reconstruction after gastric cancer surgery remains *** the current study,we sought to explore a reasonable method of digestive tract reconstruction and improve the quality of life and nutritional status of patients after *** this end,we statistically analyzed the clinical results of patients with gastric cancer who underwent jejunal interposition double-tract reconstruction(DTR)and esophageal jejunum Roux-en-Y reconstruction(RY).AIM To explore the application effect of DTR in total laparoscopic radical total gastrectomy(TLTG)and evaluate its safety and *** We collected the relevant data of 77 patients who underwent TLTG at the Fourth Hospital of Hebei Medical University from October 2.2. to January *** them,35 cases were treated with DTR,and the remaining 42.cases were treated with traditional *** 1:1 propensity score matching,the cases were grouped into 31 cases per group,with evenly distributed *** clinical characteristics and short-and long-term clinical outcomes of the two groups were statistically *** The two groups showed no significant differences in basic data,intraoperative blood loss,number of lymph node dissections,first defecation time after operation,postoperative hospital stay,postoperative complications,and laboratory examination results on the 1st,3rd,and 5th days after *** operation time of the DTR group was longer than that of the RY group[(307.58±65.14)min vs(2.2.45±62.09)min,P=0.016],but the first intake of liquid food in the DTR group was shorter than that in the RY group[(4.45±1.18)d vs(6.0±5.18)d,P=0.02.].The incidence of reflux heartburn(Visick grade)and postoperative gallbladder disease in the DTR group was lower than that in the RY group(P=0.033 and P=0.038).Although there was no significant difference in bod

关键词： Gastric cancer Jejunal interposition double-tract reconstruction Roux-en-Y reconstruction Laparoscope

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鲍曼不动杆菌铁离子摄取机制与基于抑制铁摄取的抗菌策略

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药学学报 2024年第5期59卷 1113-1125页

作者：张芷萌游雪甫庞晶中国医学科学院、北京协和医学院医药生物技术研究所抗感染北京市重点实验室北京100050

细菌耐药一直是抗感染药物研究领域亟待攻克的难题。鲍曼不动杆菌作为引起院内感染的重要病原菌,严重威胁患者的生命健康。近年来,多重耐药、泛耐药,甚至全耐药鲍曼不动杆菌的检出率不断升高,因此开发新的治疗鲍曼不动杆菌感染的策略迫... 详细信息

细菌耐药一直是抗感染药物研究领域亟待攻克的难题。鲍曼不动杆菌作为引起院内感染的重要病原菌,严重威胁患者的生命健康。近年来,多重耐药、泛耐药,甚至全耐药鲍曼不动杆菌的检出率不断升高,因此开发新的治疗鲍曼不动杆菌感染的策略迫在眉睫。铁是鲍曼不动杆菌生存必需的基本元素,也是参与感染进程的重要物质。细菌为了应对宿主铁饥饿现象,发展了一系列铁摄取手段,如分泌铁载体螯合铁、摄取血红素、利用Feo系统转运亚铁等。开发相应的抗菌策略以抑制鲍曼不动杆菌的铁摄取,是应对鲍曼不动杆菌感染的有效手段。本文将从鲍曼不动杆菌铁摄取机制以及基于此机制发展的抗菌策略两个方面进行综述。

关键词：宿主铁饥饿铁摄取鲍曼不动杆菌细菌耐药抗菌策略

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Effect of brazing temperature on microstructure and tensile strength ofγ-TiAl joint vacuum brazed with micro-nano Ti−Cu−Ni−Nb−Al−Hf filler

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Transactions of Nonferrous Metals Society of China 2024年第8期34卷 2563-2574页

作者： Li LI Yu-tong CHEN Lei-xin YUAN Fen LUO zhi-xue FENG Xiao-qiang LI School of Materials Science and Engineering East China Jiaotong UniversityNanchang 330013China State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure East China Jiaotong UniversityNanchang 330013China National Engineering Research Center of Near-net-shape Forming for Metallic Materials South China University of TechnologyGuangzhou 510640China

A novel micro-nano Ti−10Cu−10Ni−8Al−8Nb−4Zr−1.5Hf filler was used to vacuum braze Ti−47Al−2.b−2.r−0.15B alloy at 1160−12.0℃ for 30 *** interfacial microstructure and formation mechanism of TiAl joints and the relationships among brazing temperature,interfacial microstructure and joint strength were emphatically *** show that the TiAl joints brazed at 1160 and 1180℃ possess three interfacial layers and mainly consist of α_(2.-Ti_(3)Al,τ_(3)-Al_(3)NiTi_(2. and Ti_(2.Ni,but the brazing seams are no longer layered and Ti_(2.Ni is completely replaced by the uniformly distributed τ_(3)-Al_(3)NiTi_(2. at 12.0 and 12.0℃ due to the destruction of α_(2.-Ti_(3)Al barrier *** transformation at 12.0℃ obviously improves the tensile strength of the joint and obtains a maximum of 343 ***,the outward diffusion of Al atoms from the dissolution of TiAl substrate dominates the microstructure evolution and tensile strength of the TiAl joint at different brazing temperatures.

关键词： γ-TiAl alloy micro-nano filler vacuum brazing interfacial microstructure tensile strength

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A compact multi-pixel superconducting nanowire single-photon detector array supporting gigabit space-to-ground communications

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Light(Science & Applications) 2024年第2期13卷 254-266页

作者： Hao Hao Qing-Yuan Zhao Yang-Hui Huang Jie Deng Fan Yang Sai-Ying Ru Zhen Liu Chao Wan Hao Liu zhi-Jian Li Hua-Bing Wang xue-Cou Tu La-Bao Zhang Xiao-Qing Jia Xing-Long Wu Jian Chen Lin Kang Pei-Heng Wu Research Institute of Superconductor Electronics(RISE) School of Electronic Science and EngineeringNanjing UniversityNanjingJiangsu 210023China Purple Mountain Laboratories NanjingJiangsu 211111China Hefei National Laboratory HefeiAnhui 230088China National Laboratory of Solid State Microstructures and Department of Physics Nanjing UniversityNanjing 210023China

Classical and quantum space-to-ground communications necessitate highly sensitive receivers capable of extracting information from modulated photons to extend the communication distance from near-earth orbits to deep space *** achieve gigabit data rates while mitigating strong background noise photons and beam drift in a highly attenuated free-space channel,a comprehensive design of a multi-functional detector is *** this study,we present an innovative compact multi-pixel superconducting nanowire single-photon detector array that integrates near-unity detection efficiency(91.6%),high photon counting rate(1.61 Gcps),large dynamic range for resolving different photon numbers(1-2.),and four-quadrant position sensing function all within one ***,we have constructed a communication testbed to validate the advantages offered by such an *** 8-PPM(pulse position modulation)format communication experiments,we have achieved an impressive maximum data rate of 1.5 Gbps,demonstrating sensitivities surpassing previous benchmarks at respective *** incorporating photon number information into error correction codes,the receiver can tolerate maximum background noise levels equivalent to 0.8 photons/slot at a data rate of 12. Mbps—showcasing a great potential for daylight operation ***,preliminary beam tracking tests were conducted through open-loop scanning techniques,which revealed clear quantitative dependence indicating sensitivity variations based on beam *** on the device characterizations and communication results,we anticipate that this device architecture,along with its corresponding signal processing and coding techniques,will be applicable in future space-to-ground communication tasks.

关键词： photon supporting correction

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Reconfigurable memlogic long wave infrared sensing with superconductors

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Light(Science & Applications) 2024年第5期13卷 908-920页

作者： Bingxin Chen Huanyi xue Hong Pan Liping Zhu Xiaomi Yan Jingzhe Wang Yanru Song Zhenghua An State Key Laboratory of Surface Physics and Institute for Nanoelectronic Devices and Quantum Computing Department of PhysicsFudan UniversityShanghai 200438China. ShanghaiTech Quantum Device Lab ShanghaiTech UniversityShanghai 201210China. Shanghai Qi zhi Institute 41th FloorAI TowerNo.701 Yunjin RoadXuhui DistrictShanghai 200232China. Yiwu Research Institute of Fudan University Chengbei RoadYiwu City 322000 ZhejiangChina. Zhangjiang Fudan International Innovation Center Fudan UniversityShanghai 201210China

Optical sensors with in-cell logic and memory capabilities offer new horizons in realizing machine vision beyond von Neumann architectures and have been attempted with two-dimensional materials,memristive oxides,phasechanging materials *** the unparalleled performance of superconductors with both quantum-limited optical sensitivities and ultra-wide spectrum coverage,here we report a superconducting memlogic long-wave infrared sensor based on the bistability in hysteretic superconductor-normal phase *** cooperatively by electrical and optical pulses,the device offers deterministic in-sensor switching between resistive and superconducting(hence dissipationless)states with persistence>105 *** results in a resilient reconfigurable memlogic system applicable for,e.g.,encrypted ***,a high infrared sensitivity at 12.2.m is achieved through its in-situ metamaterial perfect absorber *** work opens the avenue to realize all-in-one superconducting memlogic sensors,surpassing biological retina capabilities in both sensitivity and wavelength,and presents a groundbreaking opportunity to integrate visional perception capabilities into superconductor-based intelligent quantum machines.

关键词： wave superconductor quantum

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Application of buried auricular point combined with Wenjing Sanhan prescription in arteriosclerosis obliterans patients with resting pain

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World Journal of Clinical Cases 2024年第24期12卷 5558-5567页

作者： Ya-Ping Li Tian Su Xiao-Li xue Huan-Ren Shi zhi-Hui Su Jun Li Department of Vascular Shijiazhuang Hospital of Traditional Chinese Medicine(Eastern Hospital District)Shijiazhuang 050011Hebei ProvinceChina

BACKGROUND Research on the combined use of ear acupoint embedding beans and warming meridians with cold-dispersing formulas for alleviating resting pain in patients with arteriosclerosis obliterans(ASO)remains *** To explore the therapeutic efficacy of auricular point embedding beans combined with Wenjing Sanhan prescription in alleviating resting pain in patients with lower-limb *** A total of 100 patients with ASO experiencing resting pain who were treated at our hospital from January 2.2. to January 2.2. were *** were randomly allocated into two groups using a double-blind *** control group was treated using a warming meridian with a cold-dispersing formula,while the study group received additional treatment with ear acupoint embedding *** clinical efficacy,ankle-brachial artery pressure ratio,hemorheological indicators,and traditional Chinese medicine symptom scores were compared between the two *** The clinical efficacy rate in the study group was significantly higher(94.00%)than that in the control group(72.00%,P2.)g/L,platelet adhesion rate(49.87%±10.51%),and erythrocyte aggregation index(1.79±0)were improved in the study group compared to the control *** addition,the scores for decreased skin temperature(1.41±0.2.),intermittent claudication(1.30±0.2.),and resting pain(1.2.±0.31)were significantly lower in the study group than those in the control group(all P<0.05).The level of oxidative stress in the study group also exhibited significant improvement(P<0.05),and the levels of inflammatory factors were considerably lower than those in the control *** The combination of ear point embedding beans and Wenjing Sanhan prescription demonstrates promising clin

关键词： Embedding beans in ear acupoints Prescription for warming channels and dispelling cold Lower limb arteriosclerosis obliterans Resting pain Blood flow rheology Curative effect

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