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Beyond 600G fiber-THz wireless seamless integration system employing cascaded MIMO equalizers

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Science China(Technological Sciences) 2024年第7期67卷 2274-2276页

作者： DING JunJie TONG WeiDong LI XinTong ZHANG Zheng ZHANG jiao CAI YuanCheng LEI MingZheng hua BingChang CHEN XingYu YU JianJun ZHU Min Purple Mountain Laboratories Nanjing 211111China National Mobile Communications Research Laboratory Southeast UniversityNanjing 210096China Fudan University Shanghai 200433China

Terahertz(THz)-wave communication, with sufficient spectrum resources(0.3 THz~10 THz), can meet the needs of future 6G large-capacity mobile communication services[1-9]. Recently, the seamless integration of existing ... 详细信息

关键词： communication fiber wireless

High density dislocations enhance creep ageing response and mechanical properties in 2195 alloy sheet

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Journal of Central South University 2024年第7期31卷 2194-2209页

作者： WEI Shuo MA Pei-pei CHEN Long-hui YANG Jian-shi ZHAN Li-hua LIU chun-hui Light Alloy Research Institute Central South UniversityChangsha 410083China State Key Laboratory of Precision Manufacturing for Extreme Service Performance Central South UniversityChangsha 410083China School of Mechanical and Electrical Engineering Central South UniversityChangsha 410083China Advancd Research Center Central South UniversityChangsha 410083China Light Alloy Research

The creep strain of conventionally treated 2195 alloy is very low,increasing the difficulty of manufacturing Al-Cu-Li alloy sheet parts by creep age ***,finding a solution to improve the creep formability of Al-Cu-Li alloy is vital.A thorough comparison of the effects of cryo-deformation and ambient temperature large pre-deformation(LPD)on the creep ageing response in the 2195 alloy sheet at 160℃with different stresses has been *** evolution of dislocations and precipitates during creep ageing of LPD alloys are revealed by X-ray diffraction and transmission electron ***-quality 2195 alloy sheet largely pre-deformed by 80%without edge-cracking is obtained by cryo-rolling at liquid nitrogen temperature,while severe edge-cracking occurs during room temperature *** creep formability and strength of the 2195 alloy are both enhanced by introducing pre-existing dislocations with a density over 1.4×10^(15)m^(−2).At 160℃and 150 MPa,creep strain and creep-aged strength generally increases by 4−6 times and 30−50 MPa in the LPD sample,respectively,compared to conventional T3 alloy *** elongation of creep-aged LPD sample is low but remains relevant for *** high-density dislocations,though existing in the form of dislocation tangles,promote the formation of refined T1 precipitates with a uniform dispersion.

关键词： creep ageing Al-Cu-Li alloy high dislocation density cryogenic rolling dislocation strengthening

Reliability of a Multicomponent Stress-strength Model Based on a Bivariate Kumaraswamy Distribution with Censored Data

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Acta Mathematicae Applicatae Sinica 2024年第2期40卷 478-507页

作者： Cong-hua CHENG School of Mathematics and Statistics Zhaoqing UniversityZhaoqing 526061China

In this paper,we consider a system which has k statistically independent and identically distributed strength components and each component is constructed by a pair of statistically dependent elements with doubly type-II censored *** elements(X1,Y1),(X2,Y2),…,(Xk,Yk)follow a bivariate Kumaraswamy distribution and each element is exposed to a common random stress T which follows a Kumaraswamy *** system is regarded as operating only if at least s out of k(1≤s≤k)strength variables exceed the random *** multicomponent reliability of the system is given by Rs,k=P(at least s of the(Z1,…,Zk)exceed T)where Zi=min(Xi,Yi),i=1,…,*** Bayes estimates of Rs,k have been developed by using the Markov Chain Monte Carlo methods due to the lack of explicit *** uniformly minimum variance unbiased and exact Bayes estimates of Rs,k are obtained analytically when the common second shape parameter is *** asymptotic confidence interval and the highest probability density credible interval are constructed for Rs,*** reliability estimators are compared by using the estimated risks through Monte Carlo simulations.

关键词： stress-strength model bivariate Kumaraswamy distribution multicomponent reliability doubly Type-II censored scheme interval estimation

Cardiovascular computed tomography in cardiovascular disease:An overview of its applications from diagnosis to prediction

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Journal of Geriatric Cardiology 2024年第5期21卷 550-576页

作者： Zhong-hua SUN Discipline of Medical Radiation Science Curtin Medical SchoolCurtin UniversityPerthAustralia Curtin Health Innovation Research Institute(CHIRI) Curtin UniversityPerth 6012Australia

Cardiovascular computed tomography angiography(CTA)is a widely used imaging modality in the diagnosis of cardiovascular *** in CT imaging technology have further advanced its applications from high diagnostic value to minimising radiation exposure to *** addition to the standard application of assessing vascular lumen changes,CTA-derived applications including 3D printed personalised models,3D visualisations such as virtual endoscopy,virtual reality,augmented reality and mixed reality,as well as CT-derived hemodynamic flow analysis and fractional flow reserve(FFRCT)greatly enhance the diagnostic performance of CTA in cardiovascular *** widespread application of artificial intelligence in medicine also significantly contributes to the clinical value of CTA in cardiovascular *** value of CTA has extended from the initial diagnosis to identification of vulnerable lesions,and prediction of disease extent,hence improving patient care and *** this review article,as an active researcher in cardiovascular imaging for more than 20 years,I will provide an overview of cardiovascular CTA in cardiovascular *** is expected that this review will provide readers with an update of CTA applications,from the initial lumen assessment to recent developments utilising latest novel imaging and visualisation *** will serve as a useful resource for researchers and clinicians to judiciously use the cardiovascular CT in clinical practice.

关键词： diagnosis cardiovascular prediction

2008—2017年昆明市西山区手足口病流行病学及病原学特征分析

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华南预防医学 2019年第1期45卷 41-44页

作者：潘莉角春华昆明市西山区疾病预防控制中心云南昆明650118

目的分析2008—2017年昆明市西山区手足口病流行病学特征,为制定手足口病防控措施提供科学依据。方法通过中国疾病预防控制信息系统收集2008—2017年昆明市西山区手足口病发病数据,采用描述流行病学方法进行分析。结果 2008—2017年西... 详细信息

目的分析2008—2017年昆明市西山区手足口病流行病学特征,为制定手足口病防控措施提供科学依据。方法通过中国疾病预防控制信息系统收集2008—2017年昆明市西山区手足口病发病数据,采用描述流行病学方法进行分析。结果 2008—2017年西山区共报告手足口病18 282例,其中重症病例572例,死亡3例,年均发病率为253.17/10万。全年均有病例报告,发病高峰集中在5—7月,共报告10 243例,占病例总数的56.03%。报告病例数居前3位的分别为福海街道办事处、前卫街道办事处和马街街道办事处,共报告病例9 925例,占病例总数的54.29%。男性10 739例,女性7 543例,男女性别比为1.42∶1;病例年龄主要集中在0～5岁年龄组,共报告17 185例,占病例总数的94.00%;病例职业以托幼儿童和散居儿童为主,分别报告8 878例(占48.56%)和8 734例(占47.77%)。2 866例实验室诊断病例中,EV 71型1 225例,占42.74%;Cox A16型1 307例,占45.60%;其他肠道病毒334例,占11.65%。结论 2008—2017年昆明市西山区手足口病流行呈现明显的季节、地区和人群分布特征,优势病原为Cox A16和EV 71,学龄前儿童是防控的重点人群。

关键词：手足口病流行病学病原学

Time-resolved ultra-small-angle X-ray scattering beamline(BL10U1)at SSRF

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Nuclear Science and Techniques 2024年第2期35卷 6-19页

作者： Wen-Qiang hua chun-Ming Yang Ping Zhou Feng Tian Jin-You Lin Yu-Zhu Wang Xiao-Yun Li Xia-Ran Miao chun-Xia Hong Qiu-Shi huang Xin-Tong Zhao Yong-Feng Men Jie Wang Xing-Yu Gao Xiu-Hong Li Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Key Laboratory of Advanced Micro Structural Materials MOEInstitute of Precision Optical EngineeringSchool of Physics Science and EngineeringTongji UniversityShanghai 200092China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

The construction of a new beamline,BL10U1,was completed at the Shanghai synchrotron radiation facility in *** multipurpose beamline was designed to provide X-ray scattering techniques such as ultra-small-angle X-ray scattering(USAXS),small-angle X-ray scattering(SAXS),wide-angle X-ray scattering,and microfocus SAXS(μSAXS)for a broad user *** realize fast time-resolved USAXS experiments,the beamline adopted an in-vacuum undulator with a total length of 1.6 m as the photon *** in-house cryogenic-cooled double multilayer monochromator was installed to deliver a photon flux of approximately 10^(13) photons/s at a photon energy of 10 *** three-year successful operation of this beamline demonstrated that the monochromator operated smoothly,as ***10U1 has three end stations in succession:USAXS end station,μSAXS end station,and end station for industrial *** minimum scattering vector q~0.0042 nm^(-1) at 10 keV can be achieved at the USAXS end station equipped with a 28 m-long and 1.8 m-diameter vacuum flight *** theμSAXS end station,a beam spot of less than 10×8μm was achieved for micro-SAXS *** contrast,in situ experimental instruments up to 5 m high and 8 m wide can be mounted at the industrial application end station,which offers industrial scientists the opportunity to use their large industrial ***10U1 opens up a new capability to investigate phenomena such as non-equilibrium and dynamic processes of materials with a wide length scale from angstroms to micrometers with millisecond time *** this paper,we also report beamline design considerations and commissioning results.

关键词： Synchrotron radiation Ultra-small-angle X-ray scattering Micro small-angle X-ray scattering USAXS Time resolved μSAXS

Arsenic and fluoride co-enrichment of groundwater in the loess areas and associated human health risks:A case study of Dali County in the Guanzhong Basin

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China Geology 2024年第3期7卷 445-459页

作者： Rui-ping Liu Fei Liu hua-qing Chen Yu-ting Yang hua Zhu You-ning Xu Jian-gang jiao Refaey M El-Wardany Xi'an Center China Geological SurveyMinistry of Natural ResourcesXi'an 710054China Observation and Research Station of Environmental Geology of Typical Mines in Shaanxi Province MNRXi'an 710054China Key Laboratory for Geo-hazards in Loess Area MNRXi'an 710054China Dalian Ocean and Fishery Comprehensive Administration Supervision Lochus Dalian 116000China Pingliang City Development and Reform Commission Pingliang 744000China School of Earth Science and Resources Chang’an UniversityXi'an 710054China Faculty of Science Al-Azhar UniversityAssiut 71524Egypt

This study aims to reveal the occurrence and origin of typical groundwater with high arsenic and fluoride concentrations in the loess area of the Guanzhong Basin—a Neogene faulted *** findings are as follows:(1)Groundwater samples with high arsenic and fluoride concentrations collected from the loess area and the terraces of the Weihe River accounted for 26%and 30%,respectively,of the total samples,with primary hydrochemical type identified as HCO_(3)-*** karst and sand areas exhibit relatively high groundwater quality,serving as preferred sources for water *** is recommended that local governments fully harness groundwater in these areas;(2)groundwater with high arsenic and fluoride concentrations in the loess area and the alluvial plain of rivers in Dali County is primarily distributed within the Guanzhong Basin,which represents the drainage zone of groundwater;(3)arsenic and fluoride in groundwater originate principally from natural and anthropogenic sources;(4)the human health risk assessments reveal that long-term intake of groundwater with high arsenic and fluoride concentrations pose cancer or non-cancer risks,which are more serious to kids compared to *** study provides a theoretical basis for the prevention and treatment of groundwater with high arsenic and fluoride concentrations in loess areas.

关键词： Arsenic Fluoride Groundwater Cancer risk Kid and adult Human health risk assessment Hydrogeological survey engineering Environmental geological survey engineering Loess areas

Nuclear charge radius predictions by kernel ridge regression with odd-even effects

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Nuclear Science and Techniques 2024年第2期35卷 94-102页

作者： Lu Tang Zhen-hua Zhang Mathematics and Physics Department North China Electric Power UniversityBeijing 102206China Hebei Key Laboratory of Physics and Energy Technology North China Electric Power UniversityBaoding 071000China

The extended kernel ridge regression(EKRR)method with odd-even effects was adopted to improve the description of the nuclear charge radius using five commonly used nuclear *** are:(i)the isospin-dependent A^(1∕3) formula,(ii)relativistic continuum Hartree-Bogoliubov(RCHB)theory,(iii)Hartree-Fock-Bogoliubov(HFB)model HFB25,(iv)the Weizsacker-Skyrme(WS)model WS*,and(v)HFB25**** the last two models,the charge radii were calculated using a five-parameter formula with the nuclear shell corrections and deformations obtained from the WS and HFB25 models,*** each model,the resultant root-mean-square deviation for the 1014 nuclei with proton number Z≥8 can be significantly reduced to 0.009-0.013 fm after considering the modification with the EKRR *** best among them was the RCHB model,with a root-mean-square deviation of 0.0092 *** extrapolation abilities of the KRR and EKRR methods for the neutron-rich region were examined,and it was found that after considering the odd-even effects,the extrapolation power was improved compared with that of the original KRR *** strong odd-even staggering of nuclear charge radii of Ca and Cu isotopes and the abrupt kinks across the neutron N=126 and 82 shell closures were also calculated and could be reproduced quite well by calculations using the EKRR method.

关键词： Nuclear charge radius Machine learning Kernel ridge regression method

Polysaccharide of Alocasia cucullata Exerts Antitumor Effect by Regulating Bcl-2, Caspase-3 and ERK1/2 Expressions during Long-Time Administration

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Chinese Journal of Integrative Medicine 2024年第1期30卷 52-61页

作者： ZHOU Qi-chun XIAO Shi-lin LIN Ru-kun LI Chan CHEN Zhi-jie CHEN Yi-fei LUO Chao-hua MO Zhi-xian LIN Ying-bo School of Traditional Chinese Medicine Southern Medical UniversityGuangzhou(510515)China Clinical and Basic Research Team of TCM Prevention and Treatment of Non-Small Cell Lung Cancer the Second Clinical College of Guangzhou University of Chinese MedicineGuangzhou(510120)China Department of Chinese Medicine Zhujiang Hospital Affiliated to Southern Medical UniversityGuangzhou(510282)China Department of Pharmacy Jiangmen Central HospitalJiangmen(529000)China

Objective: To study the in vitro and in vivo antitumor effects of the polysaccharide of Alocasia cucullata(PAC) and the underlying mechanism. Methods: B16F10 and 4T1 cells were cultured with PAC of 40 μg/m L, and PAC was withdrawn after 40 days of administration. The cell viability was detected by cell counting kit-8. The expression of Bcl-2 and Caspase-3 proteins were detected by Western blot and the expressions of ERK1/2 mRNA were detected by quantitative real-time polymerase chain reaction(qRT-PCR). A mouse melanoma model was established to study the effect of PAC during long-time administration. Mice were divided into 3 treatment groups: control group treated with normal saline, positive control group(LNT group) treated with lentinan at 100 mg/(kg·d), and PAC group treated with PAC at 120 mg/(kg·d). The pathological changes of tumor tissues were observed by hematoxylin-eosin staining. The cell apoptosis of tumor tissues was detected by TUNEL staining. Bcl-2 and Caspase-3 protein expressions were detected by immunohistochemistry, and the expressions of ERK1/2, JNK1 and p38 mRNA were detected by qRT-PCR. Results: In vitro, no strong inhibitory effects of PAC were found in various tumor cells after 48 or 72 h of administration. Interestingly however, after 40 days of cultivation under PAC, an inhibitory effect on B16F10 cells was found. Correspondingly, the long-time administration of PAC led to downregulation of Bcl-2 protein(P <0.05), up-regulation of Caspase-3 protein(P<0.05) and ERK1 mRNA(P<0.05) in B16F10 cells. The above results were verified by in vivo experiments. In addition, viability of B16F10 cells under long-time administration culture in vitro decreased after drug withdrawal, and similar results were also observed in 4T1 cells. Conclusions: Long-time administration of PAC can significantly inhibit viability and promote apoptosis of tumor cells, and had obvious antitumor effect in tumor-bearing mice.

关键词： polysaccharide of Alocasia cucullata tumor cells Bcl-2 Caspase-3 ERK1/2 Chinese medicine