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| 1 | 旅游地文化空间及其演化机理显示文摘旅游活动的文化属性决定了旅游地本质上是为旅游者提供一个文化空间。从旅游地文化的空间研究转向空间的文化研究,并厘清旅游地文化空间的内涵及其演化机理,寻求旅游地的文化发展规律,有助于解决旅游规划与开发中'造文化、造景观'的困境。基于空间生产和景观生态学原理,以及旅游地文化空间的活态性,旅游地文化空间的时间和功能演化是由原居民的生产与生活空间演变为服务于旅游发展的生产与生活空间的过程。旅游地文化空间在形态上,则表现为文化节点、文化轴线、文化场、文化域面等基本空间形态的形成与演化。文化场作为最为重要的空间形态,它是旅游地进行生产、生活与服务的真实场景,体现了人与旅游景观的社会文化关系。 | 李星明 朱媛媛 胡娟 时朋飞 LIU Juanita C. | 2015 | 经济地理2015，35，5： | 42 |
| 2 | A community-derived classification for extant lycophytes and ferns显示文摘发展史长通知了蕨类植物分类。当我们推断进化的树的能力改善了,针对认出生来的组的分类变得逐渐地预兆、稳定。这里,我们为 lycophytes 和蕨纲植物提供一个现代、全面分类,在下面,利用一条基于社区的途径类水平。我们 monophyly 用作主要标准让 taxa,而且目的识别保存两个广泛地被接受的存在 taxa 和界限并且与我们蕨类植物发展史的理解一致。总共,这个分类对待一在 337 个类, 51 个家庭, 14 目,和二个班估计了 11 916 种类。这个分类没在 lycophyte 和蕨纲植物上作为最后的词被打算分类,而是当前的假设的概括陈述,源于最好的可得到的数据并且在问题由熟悉植物的那些大多数塑造了。我们希望它将在蕨类植物上为最近的文学的那些想要的参考用作一个资源发展史和分类,为指导未来调查的一个框架,和推进讲话的刺激。 | Eric Schuettpelz Harald Schneider Alan R. Smith Peter Hovenkamp Jefferson Prado Germinal Rouhan Alexandre Salino Michael Sundue Thafs Elias Almeida Barbara Parris Emily B. Sessa Ashley R. Field Andre Luis de Gasper Carl J. Rothfels Michael D. Windham Marcus Lehnert Benjamin Dauphin Atsushi Ebihara Samuli Lehtonen Pedro Bond Schwartsburd Jordan Metzgar Li-Bing Zhang Li-Yaung Kuo Patrick J. Brownsey Masahiro Kato Marcelo Daniel Arana Francine C. Assis Michael S. Barker David S. Barrington Ho-Ming Chang Yi-Han Chang Yi-Shan Chao Cheng-Wei Chen De-Kui Chen Wen-Liang Chiou Vinicius Antonio de Oliveira Dittrich Yi-Fan Duan Jean-Yves Dubuisson Donald R. Farrar Susan Fawcett Jose Maria Gabriel y Galan Luiz Armando de Araujo Goes-Neto Jason R. Grant Amanda L. Grusz Christopher Haufler Warren Hauk Hai He Sabine Hennequin Regina Yoshie Hirai Layne Huiet Michael Kessler Petra Korall Paulo H. Labiak Anders Larsson Blanca Leen Chun-Xiang Li Fay-Wei Li Melanie Link-Perez Hong-Mei Liu Ngan Thi Lu Esteban I. Meza-Torres Xin-Yuan Miao Robbin Moran Claudine Massi Mynssens Nathalie Nagalingum Benjamin Ollgaard Alison M. Paul Jovani B. de S. Pereira Leon R. Perrie Monica Ponce Tom A. Ranker Christian Schulz Wataru Shinohara Alexander Shmakov Erin M. Sigel Filipe Soares de Souza Lana da Silva Sylvestre Weston Testo Luz Amparo Triana-Moreno Chie Tsutsumi Hanna Tuomisto IvAn A. Valdespino Alejandra Vasco Raquel Stauffer Viveros Alan Weakley Ran Wei Stina Weststrand Paul G. Wolf George Yatskievych Xiao-Gang Xu Yue-Hong Yan Liang Zhang Xian-Chun Zhang Xin-Mao Zhou | 2016 | Journal of Systematics and Evolution2016，54，6： | 44 |
| 3 | Rapid quantification of semen hepatitis B virus DNA by real-time polymerase chain reaction显示文摘AIM: To examine the sensitivity and accuracy of real-time polymerase chain reaction (PCR) for the quantification of hepatitis B virus (HBV) DNA in semen.METHODS: Hepatitis B viral DNA was isolated from HBV carriers' semen and sera using phenol extraction method and QTAamp DNA blood mini kit (Qiagen, Germany). HBV DNA was detected by conventional PCR and quantified by TaqMan technology-based real-time PCR (quantitative polymerase chain reaction (qPCR)). The detection threshold was 200 copies of HBV DNA for conventional PCR and 10 copies of HBV DNA for real time PCR per reaction.RESULTS: Both methods of phenol extraction and QIAamp DNA blood mini kit were suitable for isolating HBV DNA from semen. The value of the detection thresholds was 500 copies of HBV DNA per mL in the semen. The viral loads were 7.5×107 and 1.67×107 copies of HBV DNA per mL in two HBV infected patients' sera, while 2.L4×105 and 3.02×105 copies of HBV DNA per mL in the semen.CONCLUSION: Real-time PCR is a more sensitive and accurate method to detect and quantify HBV DNA in the semen. | Wei-Ping Qian Yue-Qiu Tan Ying Chen Ying Peng Zhi Li Guang-Xiu Lu Made C. Liu Hsiang-Fu Kung Ming-Ling He Li-Ka Shing | 2005 | World Journal of Gastroenterology2005，11，34： | 25 |
| 4 | Chemical vapor deposition growth of monolayer MoSe2 nanosheets显示文摘 | Jonathan C. Shaw Hailong Zhou Yu Chen Nathan O. Weiss Yuan Liu Yu Huang Xiangfeng Duan | 2014 | Nano Research2014，7，4： | 26 |
| 5 | 急性胰腺炎中胃裸区和左肾上腺受累的腹部CT特点及预后价值显示文摘显示急性胰腺炎(AP)中胃裸区受累(GBAI)和左肾上腺受累(LAGI)的cT表现,并评价其预后价值。回顾性分析了2003年1月至2006年12月间的116例AP病人的cT表现。34例GBAI病人(29.3%)显示胃裸区模糊、条带状高密度或积液,18例LAGI病人(15.5%)显示左肾上腺变形和密度减低。伴有GBAI和LAGI的AP病人的平均住院期长于不伴GBAI与LAGI的病人(P〈0.001)。GBAI预测并发症的敏感度和特异度分别为43.3%和89.8%,预测死亡率的敏感度和特异度分别为83.3%和73.6%。 | Z. Liu Z. Yan P. Min C. Liang Y. Wang 高莉(译) 唐光健(校) | 2008 | 国际医学放射学杂志2008，31，5： | 24 |
| 6 | The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis显示文摘 | Huang Norden E. Shen Zheng Long Steven R. Wu Manli C. Shih Hsing H. Zheng Quanan Yen Nai-Chyuan Tung Chi Chao Liu Henry H | 1998 | Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences . 1998 (1971)1998，，1971： | 22 |
| 7 | 旅游规划的文化生态理论研究显示文摘为了克服物质性旅游规划的弊端,规划中越来越多的考虑了'历史传统、伦理道德、价值观、社会公正'等文化因素,这些零散的'旅游与文化'融合研究还没有形成系统的旅游规划理论。本文根据新文化地理学的文化生态思想和工具理性与价值理性相统一的原理,以人类精神文化需要和旅游规划实践为现实需求,结合旅游规划的主要内容,应用系统分析的方法,将文化生态系统与旅游规划系统进行耦合,实现旅游规划中'工具要素之形'与'文化生态要素之神'的统一,构建旅游规划的文化生态理论。 | 李星明 曾菊新 LIU Juanita C. | 2014 | 人文地理2014，29，1： | 20 |
| 8 | 腹腔镜袖状胃切除治疗病态性肥胖及2型糖尿病的意义及国际专家共识显示文摘腹腔镜袖状胃切除术(laparoscopic sleeve gastrectomy,LSG)是近年开展的减重手术,由于其操作简单,并发症少,减重及治疗代谢性疾病效果理想,可行性强,受到越来越多专科医师、病人及医疗服务机构的重视并得到了广泛临床应用。针对亚洲病态性肥胖及胃肠疾病特点可能其更具有应用意义。明确手术适应证、禁忌证,规范操作技术标准和流程是提高手术疗效和减少手术并发症的重要保证。国际上最新的专家共识解读有利于国内临床工作的顺利开展。 | 汤朝晖 Mustafa Hussain Vivek N. Prachand John C. Mverdy Donald Liu 刘颖斌 全志伟 | 2013 | 中国实用外科杂志2013，33，1： | 19 |
| 9 | The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis显示文摘 | Huang Norden E. Shen Zheng Long Steven R. Wu Manli C. Shih Hsing H. Zheng Quanan Yen Nai-Chyuan Tung Chi Chao Liu Henry H | 1998 | 1998 (1971)1998，，1971： | 18 |
| 10 | THE INFLUENCE OF CAVITY DAMAGE ON MECHANICAL PROPERTIES OF SUPERPLASTICALLY-DEFORMED MATERIALS AND ITS PREDICTION显示文摘Aluminium alloy LY12CZ sheet without any pre-treatment has been used to study the influence of cavity damage on the mechanical properties of the superplastically-deformed materials room temper- ature. The experimental results show that: (1) the lower the rate of cavitation as the superplastic strain increases, the higher the superplasticity is; (2) the mechanical properties of superplastically- deformed materials at room temperature decrease as the superplastically-deformed strain increases, especially, a noteworthy decrease in elasticity modulus, yield strenth and ultimate strength at room temperature begins to appear as the level of cavitation by area comes up to about 4%, while at the same level the reduction in area drops down a very large quantity. Then, a three-layer back- propagation neural network has been developed to predict the machanichl properties of the superplasti- cally-deformed material.The results acquired from the neural network are very | M. B. Liu, Z. C. Zhao,H. Gao,M. Q. Li and S. C. Wu College of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，2： | 18 |
| 11 | Land cover changes based on plant successions: Deforestation, rehabilitation and degeneration of forest in the upper Dadu River watershed显示文摘To link regional land use/cover changes with environmental effects, land cover changes are required to reflect vegetation successions, whereas the land cover classification systems commonly used nowadays cannot serve this purpose. In this paper, a new land cover classification system is established in which land covers are classified by the vegetation succes-sions, taking Zamtang County, Barkam County and Jinchuan County in the upper Dadu River watershed as a study area. Using multi-temporal remote sensing images, the land cover data of 1967, 1986 and 2000 are obtained by means of integration of unsupervised classification and visual interpretation methods. The database facilitates the study of land use/cover changes, en-vironmental effects and ecological construction. Land cover changes reflect the main ecological processes in the upper Dadu River watershed. The landscape composed mainly of grasslands, wildwoods and alpine scrubs in 1967 was changed to that of grasslands, secondary forests, al-pine scrubs, fragmentary wildwoods, artificial forests, secondary scrubs in 2000, meanwhile, the landscape got more fragmentized. The total area of the forests decreased by 9.43%. Study results have shown the process of restoration of logged areas in forest centers. From 1967 to 2000, only 6.86 percents of logged areas were converted to shrubs, meadows or crop-lands, and the rest were converted into artificial forests or secondary forests. So the ecological shelter functions will be restored, stage by stage. Firewood collection, charcoal production and overgrazing are the three major triggers for the extensive degradation of alpine oak forests, Sa-bina tibetica forests and meadows. The arid valley grasslands expanded too. The degradation of vegetation in the southern slopes impairs ecological shelter functions and affects livelihood of local residents, so it is essential to find effective measures for ecological restoration and recon-struction. Field investigations have found that the current measures have not concerned with how to keep the livelihood of local farmers and herders. The most important measure for ecological protection and restoration is to help the farmers and herders to raise the living standard, which means that they will never need to rely only on the colonizing of croplands, the logging of forests and the grazing of livestock to make a living. | YAN Jianzhong1,2,3, ZHANG Yili1, BAI Wanqi1, LIU Yanhua4, BAO Weikai5, LIU Linshan1, 2 & ZHENG Du1 1. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China 3. College of Resources and Environment, Southwest Agricultural University, Chongqing 400716, China 4. The Ministry of Science and Technology, P. C. China, Beijing 100862, China 5. Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China | 2005 | Science China Earth Sciences2005，48，12： | 15 |
| 12 | The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis显示文摘 | Huang Norden E. Shen Zheng Long Steven R. Wu Manli C. Shih Hsing H. Zheng Quanan Yen Nai-Chyuan Tung Chi Chao Liu Henry H | 1998 | Proceedings of the Royal Society A: Mathematical Physical and Engineering Sciences1998，，1971： | 15 |
| 13 | Single-cell RNA-seq reveals the diversity of trophoblast subtypes and patterns of differentiation in the human placenta显示文摘胎盘为成功的怀孕和胎儿和怀孕女人的健康是关键的。然而,人的 trophoblast 系怎么被调整,包括胎盘的房间的分类,子类型糟糕被理解。这里,我们在排序的胎盘的房间上执行了定序的单个房间的 RNA (RNA-seq ) 从第一三个月并且秒三个月人胎盘。已知的 cytotrophoblast 房间(CTB ) 的房间的新子类型, extravillous trophoblast 房间(EVT ) , Hofbauer 房间,和间充质的 stromal 房间被识别, cell-type-specific 基因签名被定义。机能上地,这研究揭示了人的胎盘的许多以前未知的功能。尤其是, 102 多肽荷尔蒙基因被发现被胎盘的房间的各种各样的子类型表示,它在调整母亲的生理学的胎儿的生长和改编到怀孕建议建筑群和这些荷尔蒙的重要角色。这些结果在单个房间的分辨率记录人的胎盘的 trophoblast 区别并且因此在怀孕的早阶段期间推进我们人的胎座式的理解。 | Yawei Liu Xiaoying Fan Rui Wang Xiaoyin Lu Yan-Li Dang Huiying Wang Hai-Yan Lin Cheng Zhu Hao Ge James C. Cross Hongmei Wang | 2018 | Cell Research2018，28，8： | 15 |
| 14 | Two Divergent Members of 4-Coumarate: Coenzyme A Ligase from Salvia miltiorrhiza Bunge: cDNA Cloning and Functional Study显示文摘4-Coumarate:辅酶 A ligase (4CL ) 是在导致 phenolics 的系列的 phenylpropanoid 新陈代谢的关键酶之一,包括水溶性的酉分的酸,它是决定 Danshen (鼠尾草植物 miltiorrhiza Bunge ) 的药用的质量的重要混合物,繁体中文药用的植物。在 Danshen 在水溶性的酉分的酸的生合成调查 4CL 的功能,我们克隆由使用嵌套的反向的抄写聚合酶链反应( RT-PCR ),退化教材由 cDNA 的快速的扩大结束的 5/3 (种族)列在后面编码分叉的 4CL 成员的二 cDNAs ( Sm4CL1 和 Sm4CL2 )(笔记,这些顺序数据在就职数字 AY237163 和 AY237164 下面被提交了到 GenBank 数据库)。编码,区域被插入到 pRSET 向量,运动试金与净化的 recombinant 蛋白质被执行。Sm4CL1 的底层利用侧面从 Sm4CL2 的是不同的。到 4-coumaric 酸的 Sm4CL1 和 Sm4CL2 的 Km 价值是(72.20 獥敳 ? 楷桴吗? | Shu-Juan Zhao Zhi-Bi Hu DI Liu Frederick C. C. Leungt | 2006 | Journal of Integrative Plant Biology2006，48，11： | 13 |
| 15 | Primary identifications and palynological observations of Perilla in China显示文摘Unresolved controversies concerning the classification of the monotypic genus Perilla L.have hindered the complete understanding and subsequent sustainable use of these vital food,oil,and medicinal plants to their full potential.In the present study,we used scanning electron microscopy to obtain palynological evidence from 21 samples of Perilla plants from seven provinces in China as a potential further attribute for classification.The findings showed that pollen grains from plants of 11 samples were oblate,whereas those of the other 10 were suboblate;there were no prolate pollen grains observed.Pollen grains from all samples had diverse exine ornamentations.Based on whether they had continuous tecta on the ornamentations,the pollen grains from the 21 samples were classified into two categories:(i) 14 with irregular reticulates;and (ii) seven with continuous tecta with no perforations.None of the samples was bireticulate.The ornamentation pattern and size of pollen grains jointly provided evidence that it is appropriate for use in classifying the genus Perilla into five varieties of one species.Furthermore,by comparison,it is concluded that the shapes and exine ornamentations of Perilla are unique among those of the seven genera already investigated in the subfamily Lamioideae.Using these pollen features,Perilla can be easily distinguished from the two other subtribes (Menthinae Briq.and Thyminae Briq.) in the same tribe,supporting the view that Perilla and the other four related genera can be classified into one subtribe (Perillinae). | Yan HU Li-Wei SUN Mokgolodi Neo C. Yan-Xia ZHANG Chun-Xiu WEN Xiao-Liang XIE Yu-Jun LIU | 2010 | Journal of Systematics and Evolution2010，48，2： | 13 |
| 16 | LASER CLADDED TiCN COATINGS ON THE SURFACE OF TITANIUM显示文摘Laser cladded coatings of TiCN were produced on the surface of titanium. To obtain the optimal techniques, several conditions were tested by varying the laser scanning rate. The choice of shielding gas was also studied. The cladded coatings were then evaluated from the surface mechanics point of view based on their microhardness. The microstructure of some interesting samples was investigated by optical micrographs (OM). The results showed that under the condition of fixed pulse frequency and pulse width, the laser scanning rate and the shielding gas are the main factors influencing the components of coatings. TiCN coatings were decompounded and oxidized during the cladding process in the condition of no shielding gas of N2. X-ray diffraction results indicated that the composite coatings composed of TiCN, TiC, Ti2N, and TiO2 were produced using appropriate techniques. The results indicated that the best condition in terms of the surface microhardness is obtained when the scanning rate is 1.5mm / s, the pulse frequency is 15Hz, the pulse width is 3.0ms, and N2 is chosen as the shielding gas. The microhardness of the composite coatings is about 1331kg · mm - 2, which is about 4 times that of the substrate. The optical micrographs indicated that the cladding zone is made up of TiCN, TiO2, and some interdendritic Ti, but the diffusion zone mainly consists of the dendrites phase, and the cladded depth is about 80m, which is more than 2 times that of the laser nitrided sample. There were no microcracks or air bubbles in the cladded sample, which was cladded using the above optimal techniques. | Y.L. Yang D. Zhang H.S. Kou C. S. Liu | 2007 | Acta Metallurgica Sinica(English Letters)2007，20，3： | 13 |
| 17 | The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis显示文摘 | Huang Norden E. Shen Zheng Long Steven R. Wu Manli C. Shih Hsing H. Zheng Quanan Yen Nai-Chyuan Tung Chi Chao Liu Henry H | 1998 | Proceedings of the Royal Society A: Mathematical Physical and Engineering Sciences1998，，1971： | 10 |
| 18 | Signaling pathways for germ cell death in adult cynomolgus monkeys(Macaca fascicularis) induced by mild testicular hyperthermia and exol enous testosterone treatment显示文摘 | Jia, Y. Hikim, A.P.S. Lue,Y.H. Swerdloff, R.S. Vera,Y. Zhang,X. S. Hu, Z. Y. Li, Y. C. Liu, Y. X. Wang, C | 2007 | 南京医科大学学报(自然科学版)2007，27，10： | 10 |
| 19 | LAMOST Experiment for Galactic Understanding and Exploration (LEGUE)——The survey's science plan显示文摘We describe the current plans for a spectroscopic survey of millions of stars in the Milky Way galaxy using the Guo Shou Jing Telescope (GSJT, formerly called the Large sky Area Multi-Object fiber Spectroscopic Telescope - LAMOST). The survey will obtain spectra for 2.5 million stars brighter than r < 19 during dark/grey time, and 5 million stars brighter than r < 17 or J < 16 on nights that are moonlit or have low transparency. The survey will begin in the fall of 2012, and will run for at least four years. The telescope's design constrains the optimal declination range for observations to 10 < δ < 50 , and site conditions lead to an emphasis on stars in the direction of the Galactic anticenter. The survey is divided into three parts with different target selection strategies: disk, anticenter, and spheroid. The resulting dataset will be used to study the merger history of the Milky Way, the substructure and evolution of the disks, the nature of the first generation of stars through identification of the lowest metallicity stars, and star formation through study of open clusters and OB associations. Detailed design of the LAMOST Experiment for Galactic Understanding and Exploration (LEGUE) survey will be completed in summer 2012, after a review of the results of the pilot survey. | Li-Cai Deng Heidi Jo Newberg Chao Liu Jeffrey L. Carlin Timothy C. Beers Li Chen Hsu-Tai Lee Carl J. Grillmair Puragra Guhathakurta] Zhan-Wen Han Jin-Liang Hou Sebastien Lepine Jing Li Xiao-Wei Liu Kai-Ke Pan J. A. Sellwood Bo Wang Hong-Chi Wang Fan Yang Brian Yanny Hao-Tong Zhang Yue-Yang Zhang Zheng Zheng Zi Zhu | 2012 | Research in Astronomy and Astrophysics2012，12，7： | 10 |
| 20 | MICROSTRUCTURE AND MECHANICAL PROPERTIES OF Mg-Li ALLOY WITH Ca ADDITION显示文摘Mg-9wt%Li-2wt%Zn alloy was prepared and studied in this article. The addition of Ca to the alloy from 0.1wt% to 1wt% can refine the α-Mg and the best effect of refinement occurs when Ca content is 0.4wt%-0.5wt%. The billets can be rolled to thin sheets at room temperature, from which it is obvious that the addition of Ca improves alloys’ formality, while it decreases with the excess addition of Ca. The results also show that the ultimate tensile strength (UTS) and yield strength (YS) of the alloy with 1wt% Ca may rise by 28% and 25%, respectively, however, the elongation decreases. It is clarified that the adsorption of proper Ca on the grain boundaries refines α-Mg and improves the tensile properties, but the presence of excess Ca and stable Ca2Mg6Zn3 phase worsens the elongation. | H.B. Li G. C. Yao Z.Q. Guo Y.H. Liu H.J. Yu H.B. Ji | 2006 | Acta Metallurgica Sinica(English Letters)2006，19，5： | 9 |
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