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Statefinder diagnostic and constraints on the Palatini f(R) gravity theories

Research in Astronomy and Astrophysics 2018年第3期18卷 11-26页

作者： Shu-Lei Cao Song Li hao-ran yu Tong-Jie Zhang Department of Astronomy Beijing Normal University Department of Physics Capital Normal University Tsung-Dao Lee Institute Shanghai Jiao Tong University School of Information Management School of Physics and Electric InformationShandong Provincial Key Laboratory of BiophysicsDezhou University

We focus on a series of f(R) gravity theories in Palatini formalism to investigate the probabilities of producing late-time acceleration for the flat Friedmann-Robertson-Walker(FRW) *** apply a statefinder diagnostic to these cosmological models for chosen series of parameters to see if they can be distinguished from one another. The diagnostic involves the statefinder pair{r,s},where r is derived from the scale factor a and its higher derivatives with respect to the cosmic time t,and s is expressed by r and the deceleration parameter q. In conclusion,we find that although two types of f(R) theories:(i) f(R) = R + αR~m-βR-nand(ii) f(R) = R + α lnR-β can lead to late-time acceleration,their evolutionary trajectories in the r-s and r-q planes reveal different evolutionary properties,which certainly justify the merits of the statefinder diagnostic. Additionally,we utilize the observational Hubble parameter data(OHD) to constrain these models of f(R) gravity. As a result,except for m = n = 1/2 in case(i),α = 0 in case(i) and case(ii) allow the ΛCDM model to exist in the 1σ confidence region. After applying the statefinder diagnostic to the best-fit models,we find that all the best-fit models are capable of going through the deceleration/acceleration transition stage with a late-time acceleration epoch,and all these models turn to the de Sitter point({r,s}={1,0}) in the future. Also,the evolutionary differences between these models are distinct,especially in the r-s plane,which makes the statefinder diagnostic more reliable in discriminating cosmological models.

关键词： dark energy cosmology:miscellaneous methods:data analysis

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Blind search for 21-cm absorption systems using a new generation of Chinese radio telescopes

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Research in Astronomy and Astrophysics 2017年第6期17卷 1-4页

作者： hao-ran yu Ue-Li Pen Tong-Jie Zhang Di Li Xuelei Chen Kavli Institute for Astronomy & Astrophysics Peking University Beijing 100871 China Canadian Institute for Theoretical Astrophysics University of Toronto Toronto M5S 3H8 ON Canada Dunlap Institute for Astronomy and Astrophysics University of Toronto Toronto M5S 3H4 ON Canada Canadian Institute for Advanced Research Program in Cosmology and Gravitation Toronto ON M5G 1Z8 Canada Perimeter Institute for Theoretical Physics Waterloo ON N2L 2Y5 Canada Department of Astronomy Beijing Normal University Beijing 100875 China National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China Key Laboratory of Radio Astronomy Chinese Academy of Sciences Nanjing 210008 China Key Laboratory for Computational Astrophysics National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China

Neutral hydrogen clouds are known to exist in the Universe, however their spatial distributions and physical properties are poorly understood. Such missing information can be studied by the new generation of Chinese radio telescopes through a blind search of 21-cm absorption systems. We forecast the capabilities of surveys of 21-cm absorption systems by two representative radio telescopes in China - the Five-hundred-meter Aperture Spherical radio Telescope （FAST） and Tianlai 21-cm cosmology experiment （Tianlai）. Facilitated by either the high sensitivity （FAST） or wide field of view （Tianlai） of these telescopes, more than a thousand 21-cm absorption systems can be discovered in a few years, representing orders of magnitude improvement over the cumulative discoveries in the past half a century.

关键词： telescopes - surveys - cosmology observations

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Cosmological neutrino simulations at extreme scale

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Research in Astronomy and Astrophysics 2017年第8期17卷 89-100页

作者： J.D.Emberson hao-ran yu Derek Inman Tong-Jie Zhang Ue-Li Pen Joachim Harnois-Deraps Shuo yuan Huan-yu Teng Hong-Ming Zhu Xuelei Chen Zhi-Zhong Xing Canadian Institute for Theoretical Astrophysics University of TorontoM5S 3H8ONCanada Department of Astronomy&Astrophysics University of TorontoTorontoON M5S 3H4Canada ALCF Division Argonne National LaboratoryLemontIL 60439USA Kavli Institute for Astronomy&Astrophysics Peking UniversityBeijing 100871China Department of Astronomy Beijing Normal UniversityBeijing 100875China Department of Physics University of TorontoTorontoONtario M5S IA7Canada School of Physics and Electric Information Shandong Provincial Key Laboratory of BiophysicsDezhou UniversityDezhou 253023China Dunlap Institute for Astronomy and Astrophysics University of TorontoTorontoON M5S 3H4Canada Canadian Institute for Advanced Research Program in cosmology and Gravitation Perimeter Institute for Theoretical Physics WaterlooONN2L 2Y5Canada Department of Physics&Astronomy University of British ColumbiaVancouverBC V6T 1Z1Canada Scottish University Physics Alliance Institute for AstronomyUniversity of EdinburghEH93HJScotlandUK Department of Astronomy Peking UniversityBeijing 100871China Key Laboratory for Computational Astrophysics National Astronomical ObservatoriesChinese Academy ofSciencesBeijing 100012China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

Constraining neutrino mass remains an elusive challenge in modern *** measurements are expected from several upcoming cosmological probes of large-scale *** this goal relies on an equal level of precision from theoretical predictions of neutrino *** simulations of the non-linear evolution of cold dark matter and neutrinos play a pivotal role in this *** incorporate neutrinos into the cosmological N-body code CUBEP3M and discuss the challenges associated with pushing to the extreme scales demanded by the neutrino *** highlight code optimizations made to exploit modern high performance computing architectures and present a novel method of data compression that reduces the phase-space particle footprint from 24 bytes in single precision to roughly 9 *** scale the neutrino problem to the Tianhe-2 supercomputer and provide details of our production run,named Tian Nu,which uses 86%of the machine(13 824 compute nodes).With a total of 2.97 trillion particles,Tian Nu is currently the world’s largest cosmological N-body simulation and improves upon previous neutrino simulations by two orders of magnitude in *** finish with a discussion of the unanticipated computational challenges that were encountered during the Tian Nu runtime.

关键词： cosmology theory—large-scale structure of universe—methods numerical

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A 0.35μm CMOS Mixer for 2.45-GHz RFID Application

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射频世界 2007年第1期 88-90页

作者： hao-ran yu Jia-Long Lan School of Electronic Engineering,UESTC

A RF mixer with both low noise and high linearity is designed,operating at 2.45-GHz ISM band for RFID *** designed mixer uses an optimal input matching network and the carefully chosen sizes of transistors,also with the appropriate bias point,to improve the noise figure(NF).Also,with a resonant LC loop as the current source and a parallel PMOS-resistor as the load,the mixer has a high *** post simulation results show that the single side- band noise figure of 8.57 dB,conversion gain of 10.02 dB,input 1-dB compression point(P-1dB)of-8.33 dBm,and input third-order intercept point(IIP3)of 5.35 dBm.

关键词： RFID ISM CMOS mixers linearity noise

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Gradient‑Layered MXene/Hollow Lignin Nanospheres Architecture Design for Flexible and Stretchable Supercapacitors

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Nano-Micro Letters 2025年第2期17卷 447-462页

作者： haonan Zhang Cheng hao Tongtong Fu Dian yu Jane Howe Kaiwen Chen Ning Yan hao Ren Huamin Zhai Jiangsu Provincial Key Lab of Sustainable Pulp and Paper Technology and Biomass Materials NanJing Forestry UniversityNanjing 210037People’s Republic of China Department of Chemical Engineering and Applied Chemistry University of Toronto200 College StreetTorontoON M5S 3E5Canada Department of Materials Science and Engineering University of Toronto184 College StreetTorontoON M5S 3E4Canada College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037People’s Republic of China

With the rapid development of flexible wearable electronics,the demand for stretchable energy storage devices has *** this work,a novel gradient-layered architecture was design based on single-pore hollow lignin nanospheres(HLNPs)-intercalated two-dimensional transition metal carbide(Ti_(3)C_(2)T_(x) MXene)for fabricating highly stretchable and durable *** depositing and inserting HLNPs in the MXene layers with a bottom-up decreasing gradient,a multilayered porous MXene structure with smooth ion channels was constructed by reducing the overstacking of MXene ***,the micro-chamber architecture of thin-walled lignin nanospheres effectively extended the contact area between lignin and MXene to improve ion and electron accessibility,thus better utilizing the pseudocapacitive property of *** these strategies effectively enhanced the capacitive performance of the *** addition,HLNPs,which acted as a protective phase for MXene layer,enhanced mechanical properties of the wrinkled stretchable electrodes by releasing stress through slip and deformation during the stretch-release cycling and greatly improved the structural integrity and capacitive stability of the *** electrodes and symmetric flexible all-solid-state supercapacitors capable of enduring 600%uniaxial tensile strain were developed with high specific capacitances of 1273 mF cm^(−2)(241 F g^(−1))and 514 mF cm^(−2)(95 F g^(−1)),***,their capacitances were well preserved after 1000 times of 600%stretch-release *** study showcased new possibilities of incorporating biobased lignin nanospheres in energy storage devices to fabricate stretchable devices leveraging synergies among various two-dimensional nanomaterials.

关键词： Hollow lignin nanospheres MXene Gradient-layered architecture Wrinkled electrodes Stretchable supercapacitors

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Constraints on smoothness parameter and dark energy using observational H(z) data

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Research in Astronomy and Astrophysics 2011年第2期11卷 125-136页

作者： hao-ran yu1,Tian Lan1,hao-Yi Wan2,Tong-Jie Zhang1,3 and Bao-Quan Wang4 1 Department of Astronomy,Beijing Normal University,Beijing 100875,China 2 Business Office,Beijing Planetarium,Beijing 100044,China 3 Center for High Energy Physics,Peking University,Beijing 100871,China 4 Department of Physics,Dezhou University,Dezhou 253023,China Department of Astronomy Beijing Normal University Beijing 100875 China Business Office Beijing Planetarium Beijing 100044 China Center for High Energy Physics Peking University Beijing 100871 China Department of Physics Dezhou University Dezhou 253023 China

With large-scale homogeneity,the universe is locally inhomogeneous,clustering into stars,galaxies and larger *** property is described by the smoothness parameter α which is defined as the proportion of matter in the form of intergalactic *** we consider the inhomogeneities over a small scale,there should be modifications of the cosmological distances compared to a homogenous *** and Roeder developed a second-order ordinary differential equation（D-R equation） that describes the angular diameter distance-redshift relation for inhomogeneous cosmological ***,we may obtain the D-R equation for observational H（z） data（OHD）.The density-parameter ΩM,the state of dark energy ω,and the smoothness-parameter α are constrained by a set of OHD in a spatially flat XCDM universe as well as a spatially flat XCDM *** using a χ2 minimization method,we get α = 0.81＋0.19-0.20 and ΩM = 0.32＋0.12-0.06 at the 1σ confidence *** we assume a Gaussian prior of ΩM = 0.26 ± 0.1,we get α = 0.93＋0.07-0.19 and ΩM = 0.31＋*** the XCDM model,α is constrained to α≥ 0.80 but ω is weakly constrained around-1,where ω describes the equation of state of the dark energy（pX = ωρX）.We conclude that OHD constrains the smoothness parameter more effectively than the data of SNe Ia and compact radio sources.

关键词： cosmology -- dark energy -- cosmological parameters

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海水模式种青鳉鱼(Oryzias melastigma)的胚胎发育观察

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海洋与湖沼 2016年第1期47卷 71-82页

作者：陈漪王晓杰冉皓宇林昱上海海洋大学省部共建水产种质资源发掘与利用教育部重点实验室上海201306 上海海洋大学国际海洋研究中心上海201306 上海海洋大学海洋生物系统与神经科学研究所上海201306

海水青鳉鱼(Oryzias melastigma)作为一种新兴的海洋模式生物,可应用于海洋生态毒理学的研究。鱼类发育的早期阶段对污染物最为敏感,海水青鳉鱼胚胎毒性分析已成为毒理学研究的重要方法,但是目前尚未见有关海水青鳉胚胎发育的有关报道,... 详细信息

海水青鳉鱼(Oryzias melastigma)作为一种新兴的海洋模式生物,可应用于海洋生态毒理学的研究。鱼类发育的早期阶段对污染物最为敏感,海水青鳉鱼胚胎毒性分析已成为毒理学研究的重要方法,但是目前尚未见有关海水青鳉胚胎发育的有关报道,因此本研究对海水青鳉鱼的繁殖习性和胚胎发育过程进行了详细观察。利用体视显微镜对海水青鳉的早期胚胎发育过程的形态特征进行了连续的实验观察,并描述了各个发育时期的特征。在水温(26±0.5)°C的条件下,海水青鳉鱼受精卵历时220h 30min孵化出膜。胚胎发育过程分为受精卵激活阶段、受精卵胚盘形成阶段、卵裂阶段、囊胚阶段、原肠胚阶段、神经胚阶段、器官形成阶段、孵化出膜阶段8个阶段,共分为33个时期。

关键词：海水青鳉鱼受精卵胚胎发育

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低温驯化对斑马鱼胚胎发育和mtDNA拷贝数的影响

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生物学杂志 2019年第5期36卷 16-20页

作者：冉皓宇陈良标海洋生物科学国际联合研究中心(上海海洋大学)中国科学技术部上海201306 水产种质资源发掘与利用教育部重点实验室(上海海洋大学) 上海201306 水产科学国家级实验教学示范中心(上海海洋大学) 上海201306

旨在探索低温驯化对斑马鱼胚胎线粒体DNA(mtDNA)拷贝数及胚胎低温发育能力的影响。27℃发育至性成熟的斑马鱼,在22℃驯化6个月,构建低温驯化模型。驯化组与未驯化组分别交配产卵后,收集0hpf胚胎,在22℃和20℃下发育并观察胚胎的低温发... 详细信息

旨在探索低温驯化对斑马鱼胚胎线粒体DNA(mtDNA)拷贝数及胚胎低温发育能力的影响。27℃发育至性成熟的斑马鱼,在22℃驯化6个月,构建低温驯化模型。驯化组与未驯化组分别交配产卵后,收集0hpf胚胎,在22℃和20℃下发育并观察胚胎的低温发育能力。提取0hpf以及8hpf、12hpf、24hpf4个时期的胚胎DNA,通过绝对荧光定量PCR比较分析胚胎中mtDNA拷贝数的变化情况。结果显示,低温驯化后斑马鱼0hpf胚胎mtDNA拷贝数显著低于未驯化组胚胎mtDNA拷贝数,且mtDNA拷贝数在胚胎发育后期的3个不同时期仍低于未驯化组胚胎,但差异逐渐缩小。同时,相比于未驯化胚胎,低温驯化后的斑马鱼胚胎在22℃低温具有更高的成活率,且可以在20℃低温胁迫下成活。研究表明,低温驯化致使斑马鱼胚胎mtDNA拷贝数降低,同时提高了斑马鱼胚胎的低温发育能力。

关键词：低温驯化斑马鱼 mtDNA 胚胎发育

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Molecular mechanism and research progress of traditional Chinese medicine in the treatment of prostate cancer

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Traditional Medicine Research 2025年第1期10卷 62-72页

作者： Hai-Luo Wang Ruo-ran Zhang hao Wang Peng Xu Jing-Kai Wang Bo Chen hao Xu Deng Pan yu-Yang Ma Kun Pang Department of Urology Xuzhou Central HospitalXuzhou Clinical School of Xuzhou Medical CollegeXuzhou 221009China Graduate School Jiangsu UniversityZhenjiang 212013China Graduate School Bengbu Medical UniversityBengbu 233040China Department of Urology The Peixian People’s HospitalXuzhou 221699China.

Prostate cancer(PCa)is one of the most common malignant tumors in the male genitourinary system,ranking second in incidence *** Chinese medicine(TCM),as an important component of complementary and alternative medicine,shows unique advantages in cancer *** herbal medicine is usually composed of multiple ingredients and involves multiple signaling pathways,which showed function of inducing apoptosis of cancer cells,arresting the cell cycle,inhibiting invasion and metastasis,reducing drug resistance,and regulating immune *** therapy is also an important treatment of ***,Physical therapy such as acupuncture or Tai Chi and Qigong are gaining increased recognition in the management of PCa,particularly in addressing issues like urinary incontinence and bone metastasis-related *** article reviews the TCM treatment and therapy of PCa,in order to provide new research avenues and treatment options for the treatment of PCa with TCM and improve the quality of life of patients.

关键词： traditional Chinese medicine prostate cancer Chinese herbal medicine physical therapy

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Low‑Temperature Fabrication of Stable Black‑Phase CsPbI_(3)Perovskite Flexible Photodetectors Toward Wearable Health Monitoring

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Nano-Micro Letters 2025年第3期17卷 232-245页

作者： Yingjie Zhao Yicheng Sun Chaoxin Pei Xing Yin Xinyi Li Yi hao Mengru Zhang Meng yuan Jinglin Zhou yu Chen Yanlin Song College of Chemistry and Pingyuan Laboratory Zhengzhou UniversityZhengzhou 450001People’s Republic of China Key Laboratory of Green Printing Institute of ChemistryChinese Academy of SciencesBeijing 100190People’s Republic of China Key Laboratory of Bio‑Inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190People’s Republic of China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049People’s Republic of China

Flexible wearable optoelectronic devices fabricated fromorganic–inorganic hybrid perovskites significantly accelerate the developmentof portable energy,biomedicine,and sensing fields,but their poor thermal stabilityhinders further ***,all-inorganic perovskites possessexcellent thermal stability,but black-phase all-inorganic perovskite filmusually requires high-temperature annealing steps,which increases energy consumptionand is not conducive to the fabrication of flexible wearable *** this work,an unprecedented low-temperature fabrication of stable blackphaseCsPbI3perovskite films is demonstrated by the in situ hydrolysis reactionof diphenylphosphinic chloride *** released diphenyl phosphateand chloride ions during the hydrolysis reaction significantly lower the phasetransition temperature and effectively passivate the defects in the perovskitefilms,yielding high-performance photodetectors with a responsivity of 42.1 AW−1 and a detectivity of 1.3×10^(14)***,high-fidelity imageand photoplethysmography sensors are demonstrated based on the fabricated flexible wearable *** work provides a newperspective for the low-temperature fabrication of large-area all-inorganic perovskite flexible optoelectronic devices.

关键词： In situ hydrolyzation Low-temperature processing All-inorganic perovskite Flexible photodetectors Health monitoring

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