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The history of crustal uplift and metamorphic evolution of Panzhihua-Xichang micro-palaeoland, SW China:Constraints on Sm-Nd, ^(40)Ar/^(39)Ar and FT ages of granulites

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Science China Earth Sciences 2004年第8期47卷 689-703页

作者： XU Shijin1, LIU Wenzhong1, WANG Rucheng1, YU Hangbo1, LI Daming2. WAN Jinglin2.& FANG Zhong1 1. Department of Earth Sciences and State Key Laboratory for Mineral Deposits Research, Nanjing University, Nanjing 2.0093, China 2. Institute of Geology, China Seismological Bureau, Beijing 10002., China 1. Department of Earth Sciences and State Key Laboratory for Mineral Deposits Research Nanjing University 210093 Nanjing China 2. Institute of Geology China Seismological Bureau 100029 Beijing China

Panzhihua-Xichang (Panxi) micro-palaeoland is the oldest terrane on the western margin of the Yangtze Block. Some intermediate-basic granulites are considered to be the crys-talline basement of lower crust in the terrane. Granulite-facies metamorphism of the granulites was developed in the period from 1186 Ma to 112. Ma. The origin of granulites was related to the collision orogenic process occurring when the micro-palaeolands merged to form the Rodinia Supercontinent. Amphibolite-facies retrogressive metamorphism of granulites took place in the period from 877 Ma to 82. Ma. This period was consistent with the breakup time of the Rodinia Supercontinent. 40Ar/39Ar ages and fission track (FT) ages of granulites in the Panxi mi-cro-palaeoland show that the vertical movement history of crustal rocks was a slow uplift process of the rigid terrane in the time from Neoproterozoic to Mesozoic. The subduction of India Plate towards Euroasia Plate resulted in the rapid uplift of the Qinghai-Tibetan Block in Cenozoic. Meanwhile, the Qinghai-Tibetan Block moved towards east. Consequently the Panxi terrane was uplifted rapidly. As a result of the collision orogeny between the Qinghai-Tibetan Block and the Panxi terrane, the granulite-facies crystalline basement in this region was exhumed and exposed to the surface.

关键词： granulite,isotope geochronology,crustal uplift movement,Panzhihua-Xichang region,western margin of Yangtze Block.

Cinobufotalin prevents bone loss induced by ovariectomy in mice through the BMPs/SMAD and Wnt/β-catenin signaling pathways

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Animal Models and Experimental Medicine 2024年第3期7卷 208-221页

作者： Da-zhuang Lu Li-jun Zeng Yang Li Ran-li Gu Meng-long Hu Ping Zhang peng Yu Xiao Zhang Zheng-wei Xie Hao Liu Yong-sheng Zhou Department of Prosthodontics Peking University School and Hospital of StomatologyBeijingChina National Center of Stomatology BeijingChina National Clinical Research Center for Oral Diseases BeijingChina Beijing Key Laboratory of Digital Stomatology BeijingChina Department of Cariology and Endodontology Peking University School and Hospital of StomatologyBeijingChina Peking University International Cancer Institute Peking University Health Science CenterPeking UniversityBeijingChina Central Laboratory Peking University School and Hospital of StomatologyBeijingChina National Engineering Research Center of Oral Biomaterials and Digital Medical Devices BeijingChina

Background:Osteoporosis is a chronic bone disease characterized by bone loss and decreased bone ***,current anti-resorptive drugs carry a risk of various *** deep learning-based efficacy prediction system(DLEPS)is a forecasting tool that can effectively compete in drug screening and prediction based on gene expression *** study aimed to explore the protective effect and potential mechanisms of cinobufotalin(CB),a traditional Chinese medicine(TCM),on bone ***:DLEPS was employed for screening anti-osteoporotic agents according to gene profile changes in primary ***-CT,histological and morphological analysis were applied for the bone protective detection of CB,and the osteogenic differentiation/function in human bone marrow mesenchymal stem cells(hBMMSCs)were also *** underlying mechanism was verified using qRT-PCR,Western blot(WB),immunofluorescence(IF),***:A safe concentration(0.2.mg/kg in vivo,0.05μM in vitro)of CB could effectively preserve bone mass in estrogen deficiency-induced bone loss and promote osteogenic differentiation/function of *** BMPs/SMAD and Wnt/β-catenin signaling pathways participated in CB-induced osteogenic differentiation,further regulating the expression of osteogenesis-associated factors,and ultimately promoting ***:Our study demonstrated that CB could significantly reverse estrogen deficiency-induced bone loss,further promoting osteogenic differentiation/function of hBMMSCs,with BMPs/SMAD and Wnt/β-catenin signaling pathways involved.

关键词： BMPs/SMAD bone loss cinobufotalin hBMMSCs osteogenesis osteoporosis Wnt/β-catenin signaling pathways

Modeling of ion cyclotron resonance frequency heating of proton-boron plasmas in EHL-2.spherical tokamak

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Plasma Science and Technology 2024年第10期26卷 39-48页

作者： Xianshu WU Jingchun LI Jiaqi DONG Yuejiang SHI Guoqing LIU Yong LIU zhiqiang LONG Buqing ZHANG Baoshan YUAN Y.K.Martin peng Minsheng LIU Shenzhen Key Laboratory of Nuclear and Radiation Safety Institute for Advanced Study in Nuclear Energy&SafetyCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 510640People’s Republic of China Department of Earth and Space Sciences Southern University of Science and TechnologyShenzhen 518055People’s Republic of China ENN Science and Technology Development Co. Ltd.and Hebei Key Laboratory of Compact FusionLangfang 065001People’s Republic of China Siemens Shenzhen Magnetic Resonance Ltd. Shenzhen 518057People’s Republic of China

Ion cyclotron resonance heating(ICRH)stands out as a widely utilized and cost-effective auxiliary method for plasma heating,bearing significant importance in achieving high-performance discharges in p-^(11)B *** light of the specific context of p-^(11)B plasma in the EHL-2.device,we conducted a comprehensive scan of the fundamental physical parameters of the antenna using the full-wave simulation program *** preliminary result indicated that for p-^(11)B plasma,optimal ion heating parameters include a frequency of 40 MHz,with a high toroidal mode number like N_(?)=2. to heat the majority H *** addition,we discussed the impact of concentration of minority ion species on ion cyclotron resonance heating when^(11)B serves as the heavy minority *** significant difference in charge-to-mass ratio between boron and hydrogen ions results in a considerable distance between the hybrid resonance layer and the tow inverted cyclotron resonance layer,necessitating a quite low boron ion concentration to achieve effective minority *** also considered another method of direct heating of hydrogen ions in the presence of boron ion *** is found that at appropriate boron ion concentrations(X(^(11)B)~17%),the position of the hybrid resonance layer approaches that of the hydrogen ion cyclotron resonance layer,thereby altering the polarization at this position and significantly enhancing hydrogen ion fundamental absorption.

关键词： ICRF hydrogen-boron fusion mode conversion fundamental absorption

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手性稀土纳米材料的圆偏振发光研究进展

中国科学：化学 2024年第8期54卷 1178-1193页

作者：陈玉婷董胜贺王鹏鹏金属材料强度国家重点实验室陕西省软物质国际联合研究中心西安交通大学材料科学与工程学院西安710049

圆偏振发光(CPL)是手性材料受到激发后发射出具有差异的左旋或右旋圆偏振光的独特光学现象,可以应用于量子计算、信息加密和三维显示等领域.随着纳米科学和技术的发展,具有CPL性能的手性稀土纳米材料因其出色的光学稳定性等特点而备受关... 详细信息

圆偏振发光(CPL)是手性材料受到激发后发射出具有差异的左旋或右旋圆偏振光的独特光学现象,可以应用于量子计算、信息加密和三维显示等领域.随着纳米科学和技术的发展,具有CPL性能的手性稀土纳米材料因其出色的光学稳定性等特点而备受关注,并具有大的应用潜力.本文综述了手性稀土纳米材料的最新研究进展,首先介绍了稀土元素的光谱特性及早期手性稀土配合物的研究,详述了如何构筑具有CPL的手性稀土纳米材料,强调了合成过程中手性结构对发光性能的调控特点,并通过主-客体策略讨论了如何通过稀土发光客体与手性主体的选择来优化CPL性能.最后,探讨了CPL稀土纳米材料领域面临的挑战,如发光性能和手性控制等问题,并对手性稀土纳米材料在未来的应用前景进行了展望.

关键词：手性圆偏振发光手性稀土纳米材料主-客体策略

CAT: A Simple yet Effective Cross-Attention Transformer for One-Shot Object Detection

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Journal of Computer Science & Technology 2024年第2期39卷 460-471页

作者：林蔚东邓玉岩高扬王宁刘凌峤张磊王鹏 School of Computer Science Northwestern Polytechnical UniversityXi’an710000China National Engineering Laboratory for Integrated Aero-Space-Ground-Ocean Big Data Application Technology Northwestern Polytechnical UniversityXi'an710000China School of Computer Science The University of AdelaideAdelaideSA 0115Australia

Given a query patch from a novel class,one-shot object detection aims to detect all instances of this class in a target image through the semantic similarity ***,due to the extremely limited guidance in the novel class as well as the unseen appearance difference between the query and target instances,it is difficult to appropriately exploit their semantic similarity and generalize *** mitigate this problem,we present a universal Cross-Attention Transformer(CAT)module for accurate and efficient semantic similarity comparison in one-shot object *** proposed CAT utilizes the transformer mechanism to comprehensively capture bi-directional correspondence between any paired pixels from the query and the target image,which empowers us to sufficiently exploit their semantic characteristics for accurate similarity *** addition,the proposed CAT enables feature dimensionality compression for inference speedup without performance *** experiments on three object detection datasets MS-COCO,PASCAL VOC and FSOD under the one-shot setting demonstrate the effectiveness and efficiency of our model,e.g.,it surpasses CoAE,a major baseline in this task,by 1.0%in average precision(AP)on MS-COCO and runs nearly 2.5 times faster.

关键词： one-shot object detection Transformer attention mechanism

英国早产儿视网膜病变的筛查和治疗指南2.2.更新版解读

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中国当代儿科杂志 2024年第5期26卷 437-443页

作者：董晓燕李嘉知罗可人唐军母得志四川大学华西第二医院儿科/出生缺陷与相关妇儿疾病教育部重点实验室四川成都610041 四川大学华西第二医院眼科四川成都610041

英国早产儿视网膜病变的筛查和治疗指南2.2.更新版由英国皇家儿科与儿童健康学院和皇家眼科学院的多学科指南制订小组按照英国国家卫生与临床优化研究所标准制订,于2.2.年3月发表在英国皇家儿科与儿童健康学院网站和皇家眼科学院网站,2...

英国早产儿视网膜病变的筛查和治疗指南2.2.更新版由英国皇家儿科与儿童健康学院和皇家眼科学院的多学科指南制订小组按照英国国家卫生与临床优化研究所标准制订,于2.2.年3月发表在英国皇家儿科与儿童健康学院网站和皇家眼科学院网站,2.2.年3月在Early Human Development杂志正式发表。该指南对早产儿视网膜病变的筛查及治疗进行了循证推荐和建议。与更新前的指南相比,2.2.更新版最重要的变化是将胎龄筛查标准降至31周以下;治疗部分涵盖了早产儿视网膜病变的治疗适应证、时间、方法及随诊。该文对该指南进行解读并与国内早产儿视网膜病变指南/共识进行比较,为国内同行提供参考和借鉴。

关键词：视网膜病变筛查治疗指南早产儿

Study on the Size Distribution and Similarity Law of Bubble Nuclei in Water

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China Ocean Engineering 2021年第3期35卷 432-442页

作者： YAO Xiong-liang LI zhi-peng SUN Long-quan CHEN Wei-chu College of Shipbuilding Engineering Harbin Engineering UniversityHarbin 150001China

To study the distribution characteristics and similarity laws of nuclei under different pressures,based on the selfdesigned decompression chamber and the acoustic measuring system,the size distributions of nuclei in the degassed tap water under negative ambient pressures were measured.A number density distribution function of nuclei based on the modified Weibull distribution function was proposed and verified by the experimental measurement results and some published data of nuclei size *** on this nuclei number density distribution function,the similarity law of the nuclei size distribution was analyzed:in the scale experiment,the value of exponential in the similarity law of the nuclei number density should be determined by the nuclei size distribution of the water in the prototype experiment and the actual nuclei size distribution of the water in the model *** a precondition is that the nuclei size distributions are similar.

关键词： nuclei number density distribution function microbubble ambient pressure similarity law

Weighted composition operators between μ-Bloch spaces on the unit ball

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Science China Mathematics 2005年第10期48卷 1349-1368页

作者： ZHANG Xuejun~1 & XIAO Jianbin~2.1. College of Mathematics and Computer Science,Hunan Normal University,Changsha 410006,China(email:xuejunttt@2.3. net) 2. The School of Science,Hangzhou Dianzi University,Hangzhou 310037,China 1. College of Mathematics and Computer Science Hunan Normal University 410006 Changsha China 2. The School of Science Hangzhou Dianzi University 310037 Hangzhou China

In this paper,necessary and sufficient conditions are given for the weighted composition operator T_(ψ,ψ) to be bounded or compact from the space β_μ to β_ν (or β_(μ,0) to β_(ν,0) ) on the unit ball of C^***... 详细信息

关键词： μ-Bloch space, weighted composition operator, boundedness, compactness.

Development of simple sequence repeats (SSR) markers of ramie and comparison of SSR and inter-SSR marker systems

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Progress in Natural Science:Materials International 2005年第02期15卷 42-47页

作者： ZHOU Jianlin1*, JIE Yucheng2., JIANG Yanbo2. ZHONG Yingli1, LIU Yunhai1 and ZHANG Jian1**(1. Department of Biochemistry and Molecular Biology, College of Life Science, Hunan Normal University, Changsha 410081, China 2. Institute of Bast Fiber Crops, Chinese Academy of Agricultural Science, Changsha 410006, China) Department of Biochemistry and Molecular Biology College of Life Science Hunan Normal University Changsha 410081 China. Institute of Bast Fiber Crops Chinese Academy of Agricultural Science Changsha 410006 China

Ramie (Boehmeria nivea L.) is an important bast fiber crop. To study genetic background of this species, we isolated and characterized microsatellite markers of ramie. A genomic library containing inserts of rapid amplification of polymorphic DNA (RAPD) fragments was constructed, and screened by PCR amplification using anchored simple sequence repeats as primers. A total of 2. clones were identified as positives, and 13 microsatellite loci were found after sequencing. The polymorphism of these 13 microsatellite loci was examined and the utility of simple sequence repeats (SSR) and inter-SSR (ISSR) marker systems for genetic characterization compared using 19 selected ramie cultivars. Both approaches successfully discriminated the 19 cultivars which differed in the amount of polymorphism detected. The level of polymorphism detected by SSR was 95.0%, higher than that by ISSR (72.3%), but the average polymorphism information content (PIC) of ISSR (0.651) was higher than that of SSR (0.441). The higher PIC value of ISSR suggests that ISSR is more efficient for fingerprinting ramie cultivars than SSR markers. However, because the SSR loci are codominant, they are more suitable for determining the homozygosity levels of ramie, constructing linkage map, quantitative trait loci study of complex traits and marker-assisted selection.

关键词： ramie (Boehmeria nivea L.Gaud) simple sequence repeats inter-simple sequence repeats