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A study on vector mediator top-philic dark matter

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Communications in Theoretical Physics 2024年第8期76卷 67-78页

作者： yanyan hu Yandong Liu Yuanyuan Liu College of Nuclear Science and Technology Beijing Normal UniversityJoint Laboratory of Jinping Ultra-low Radiation Background Measurement of Ministry of Ecology and EnvironmentJinping Deep Underground Frontier Science and Dark Matter Key Laboratory of Sichuan ProvinceKey Laboratory of Beam Technology of Ministry of EducationBeijing 100875China Beijing Radiation Center Beijing 100875China

We conducted a study on a simplified dark matter model that introduces a vector-like intermediate particle,facilitating exclusive interactions between dark matter and the top quark in the Standard *** analysis focused on the relic density of Dirac-type fermion dark matter and highlighted the complementary role of direct detection in constraining the dark matter ***,in instances when dark matter mass is small,the tree-level two-body annihilation process experiences *** such scenarios,the contributions of the threebody process(χχ→tbW-)and the one-loop process(χχ→gg)dominate the relic *** regard to direct detection,calculations were performed for the two-loop contribution to the dark-matter-gluon interaction,yielding the corresponding spin-independent scattering cross section.

关键词： dark matter new physics effective field theory

Probing dipole operators and four-fermion operators at low-energy lepton colliders

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Chinese Physics C 2024年第9期48卷 60-67页

作者： yanyan hu Xinheng Guo Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Beijing Radiation Center Beijing 100875China

In this study,we explore the potentials of dipole operators and four-fermion operators at low-energy lepton colliders such as Belle Ⅱ and the Super Tau Charm Facility(STCF).We utilize high-dimension operators to characterize such anomalous interactions,focusing on those that do not interfere with the Standard Model(SM) *** polarized beams,the four-fermion operators and dipole moment operators can be tested with high precision.

关键词： new physics effective field theory collider

Storage and Density of Soil Organic Carbon in Urban Topsoil of Hilly Cities:A Case Study of Chongqing Municipality of China

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Chinese Geographical Science 2013年第1期23卷 26-34页

作者： LIU Yong WANG Cheng YUE Wenze hu yanyan College of Resources and Environment Southwest University Institute of Land Science and Property Management Zhejiang University Chongqing Institute of Landscape Gardening

Rapid urbanization results in the conversion of natural soil to urban soil,and consequently,the storage and density of the soil carbon pools *** Chongqing Municipality of China as a study case,this investigation attempts to better understand soil carbon pools in hilly ***,the vegetated areas in the study area were derived from QuickBird ***,topsoil data from 220 soil samples(0-20 cm) in the vegetated areas were collected and their soil organic carbon(SOC) densities were *** the Kriging interpolation method,the spatial pattern of SOC was *** results show that the SOC density exhibited high spatial variability in the urban topsoil of ***,the SOC density in topsoil decreased according to slope in the order 2°-6° < 25°-90° < 0°-2° < 6°-15° < 15°-25°.Second,the newly developed areas during 2001-2010 had a lower SOC density than the areas built before ***,urban parks and gardens had a higher SOC density in topsoil,residential green land followed,and scattered street green land ranked *** hilly cities,the variability of terrain affects the distribution of *** Kriging results indicate that Kriging method combining slope with SOC density produced a high level of *** Kriging results show that the SOC density to the north of the Jialing River was higher than the *** vegetated areas were estimated to amount to 73.5 km2 across the study area with an SOC storage of 0.192 Tg and an average density of 2.61 kg/m2.

关键词： soil organic carbon (SOC) topsoil hilly city Kriging interpolation

Effect of CSH Crystal Nucleus on Steam-Free Cured Fly Ash Precast Concrete Components

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Journal of Renewable Materials 2023年第9期11卷 3485-3500页

作者： Ruyi Luo yanyan hu Tingshu He Xiaodong Ma Yongdong Xu College of Materials Science and Engineering Xi’an University of Architecture&TechnologyXi’an710055China

The measures of steam curing and early-strengthening agents to promote the precast components to reach the target strength quickly can bring different degrees of damage to the *** on this,the new nanomaterial CSH-the hydration product of cement effectively solves these measures’disadvantages,such as excessive energy consumption,thermal stress damage,and the introduction of external *** this paper,the effect of CSH on the early strength of precast fly ash concrete components was investigated in terms of setting time,workability,and mechanical properties and analyzed at the microscopic level using hydration temperature,XRD,and *** results showed that under the same workability,CSH could significantly reduce the amount of admixture,shorten the final setting time,almost not affect the initial setting time,and accelerate the hydration of *** the optimum dose of 5%,the mechanical properties of the specimens were improved by more than 98%within 12 h of hydration,resulting in an earlier release time of 12 h and no risk of strength inversion *** results of this paper give theoretical support to the behavior of precast components under steam-free curing.

关键词： Fly ash concrete prefabricated components steam-free curing CSH crystal nucleus tobermorite

Photosynthetic biomaterials: applications of photosynthesis in algae as oxygenerator in biomedical therapies

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Bio-Design and Manufacturing 2021年第3期4卷 596-611页

作者： Yong Wang Yanan Xue Tao Zhang Qingqing Fang Mingyuan Jin Xiaofeng Wang Zhengcai Wang yanyan hu Wanyi Zhao Dong Lou Wei-Qiang Tan Department of Plastic Surgery Sir Run Run Shaw HospitalZhejiang University School of Medicine3 East Qingchun RoadHangzhou 310016China Department of Plastic Surgery The Fourth Affiliated HospitalZhejiang University School of MedicineN1 Shangcheng RoadYiwu 322000China

For most organisms,molecular oxygen is indispensable for normal physiological metabolism;in humans,prolonged hypoxia in tissues can induce many diseases,exemplified by cardiovascular disease,chronic wounds,and tissue ***,the oxygen in our environment is vital for *** a main source of oxygen in the natural world that transforms light energy into chemical energy and oxygen,photosynthesis has been widely studied in scientific research and used in production of food,fuel,and *** recent years,photosynthesis has become more closely involved in biomedicine and has been widely used in photodynamic therapy,tissue regeneration,transplantation,and in treatment of specific *** review summarizes innovative applications of photosynthesis in biomedical research and highlights the theory and implications of clinical treatment for specific diseases.

关键词： Biomaterials Photosynthesis Hypoxia Myocardial infarction Photodynamic therapy Tissue engineering

从东方奇幻到赛博朋克:对两种“物化”的思想考察

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电影艺术 2023年第3期 75-80页

作者：胡彦彦南京大学哲学系

《新神榜:杨戬》等影片中东方奇幻与西式赛博朋克美学的混搭,成为幻想电影的新潮流。东方奇幻故事在现代包装下迎来某种新生,魔法与科技的嫁接创造出一种时空叠加的新颖景观。幻想电影中妖物与机械物可被视为文明两端,即“前人类—文明... 详细信息

《新神榜:杨戬》等影片中东方奇幻与西式赛博朋克美学的混搭,成为幻想电影的新潮流。东方奇幻故事在现代包装下迎来某种新生,魔法与科技的嫁接创造出一种时空叠加的新颖景观。幻想电影中妖物与机械物可被视为文明两端,即“前人类—文明—后人类”大历史视角下两种为人所“恋畏”的物之存在,隐射了现实中被物化的人的隐痛与斗争。揭示两种“物”所蕴含的能动性,将为我们走出人类中心主义、走向人类解放提供一种探索性思考。

关键词：奇幻赛博格前文明后人类

Effects of Three Kinds of Sewage Sludge on Physiological Characteristics of Flower Plants

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Agricultural Biotechnology 2019年第2期8卷 201-204页

作者： yanyan hu Xiang CHEN Fuyin XU Bing BAO Chongqing Landscape and Gardening Research Institute Chongqing Urban Landscape Engineering Technology Research Center College of Life Sciences Chongqing Normal University

Effects of dried sludge, digested sludge and composted sludge(obtained from the raw sludge of a large sewage treatment plant in Chongqing City) on the physiological characteristics of Salvia splendens, Tagetes patula and Petunia hybrida were studied. The results showed that the application of sludge could significantly promote the growth of three kinds of flowers and improve their quality. The effects of sludge application rate on the biological characteristics of three kinds of flowers were significant. The optimal application rate of the sludge for the growth of three kinds of flowers was 50%(mass percentage) for S. splendens and 37.5% for P. hybrida and T. patula. The effect of sludge type on the biological characteristics was not significant. However, among the three types of sludge, composted sludge had the highest organic matter content and cation exchange capacity and the lowest salt content, so the improvement of garden soil by composted sludge was relatively significant and safe.

关键词： Sewage sludge Heavy metals Flower Physiological characteristics

Analysis of Bottlenecks and Countermeasures for Utilization of Sludge in Gardens

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Meteorological and Environmental Research 2018年第6期9卷 30-33页

作者： hu yanyan Chen Xiang Xu Fuyin Bao Bing Chongqing Landscape and Gardening Research Institute Chongqing Urban Landscape Engineering Technology Research Center College of Life Sciences Chongqing Normal University

Starting with the problem of poor outlet of sludge used in gardens,the basic situation and existing bottlenecks of sludge utilization in gardens were be analyzed from the aspects of products,market and talent,and then corresponding countermeasures were proposed,such as treating and controlling heavy metals and other pollutants in sludge based on the premise of sludge stabilization and harmless treatment,aiming to reprocess the treated product and develop diversified products,using technological innovation and talent cultivation as the key,and combining sludge treatment and product processing to take the road of product utilization. The research aims to provide reference for the treatment and disposal of sludge.

关键词： Sludge Garden utilization Product Substrate Fertilizer

Oridonin inhibits SARS-CoV-2 replication by targeting viral proteinase and polymerase

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Virologica Sinica 2023年第3期38卷 470-479页

作者： Zherui Zhang Hongqing Zhang Yanan Zhang Qiuyan Zhang Qiaojie Liu yanyan hu Xiaoling Chen Jing Wang Yujia Shi Chenglin Deng Peng Gong Bo Zhang Xiaodan Li Bing Zhu Hanqing Ye Virus Laboratory Institute of PediatricsGuangzhou Women and Children's Medical CenterGuangzhou Medical UniversityGuangzhou510623China Key Laboratory of Special Pathogens and Biosafety Wuhan Institute of VirologyCenter for Biosafety Mega-ScienceChinese Academy of SciencesWuhan430071China University of Chinese Academy of Sciences Beijing100049China hunan Normal University School of MedicineChangsha410081China

COVID-19 has become a global public health crisis since its outbreak in China in December *** there are few clinically effective drugs to combat SARS-CoV-2 *** main protein(M^(pro)),papain-like protease(PL^(pro))and RNA-dependent RNA polymerase(RdRp)of SARS-CoV-2 are involved in the viral replication,and might be prospective targets for anti-coronavirus drug ***,we investigated the antiviral activity of oridonin,a natural small-molecule compound,against SARS-CoV-2 infection in *** time-of-addition analysis showed that oridonin efficiently inhibited SARS-CoV-2 infection by interfering with the genome replication at the post-entry ***,the inhibition of viral replication by oridonin depends on the oxidation activity ofα,β-unsaturated *** experiments showed that oridonin not only effectively inhibited SARS-CoV-2 Mpro activity,but also had some inhibitory effects on PLpro-mediated deubiquitinating and viral polymerase-catalyzed RNA elongation activities at high *** particular,oridonin could inhibit the bat SARS-like CoV and the newly emerged SARS-CoV-2 omicron variants(BA.1 and BA.2),which highlights its potential as a pan-coronavirus antiviral ***,our data provide strong evidence that oridonin is an efficient antiviral agent against SARS-CoV-2 infection.

关键词： SARS-CoV-2 Oridonin Antiviral Protease inhibitor