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| 1 | The timing of tectonic transition from compression to extension in Dabieshan: Evidence from Mesozoic granites显示文摘With the methods of single grain zircon U-Pb and hornblende-biotite Ar-Ar dating, a U-Pb zircon age (135.4(2.7) Ma of Liujiawa high Sr/Y granite and 40Ar-39Ar plateau ages (139.0(1.0) Ma and (125.3(0.2) Ma of hornblende and biotite respectively of Fenliupu high Sr/Y granite in the Dabieshan high- and ultrahigh-pressure metamorphic belt are yielded. Following the emplacement of the high Sr/Y granites, extension-related mafic intrusions and late granitoids with negative Sr and Eu anomalies and isotopic ages of 105-130 Ma were emplaced. Geochemical comparison between the two types of granitoids shows that, from early to late, the alkalinities, the K2O contents and the Sr/Y ratios as well as FeO/(FeO+MgO) ratios of the rocks increase, while the abundance of Sr reduces, suggesting that as time goes on the depth of crustal melting decreases. Rheological stratification of the crust due to early Cretaceous partial melting of crustal rocks resulted in crustal extension and deep-buried rock exhumation. Therefore, the high Sr/Y granite that appeared at ~135 Ma is the product of the tectonic transition from early shortening to late overall extension. | MA Changqian YANG Kunguang MING Houli LIN Guangchun | 2004 | Science China Earth Sciences2004，47，5： | 51 |
| 2 | New Zircon U-Pb Age of the Super-Large Lijiagou Spodumene Deposit in Songpan Garze Fold Belt, Eastern Tibet: Implications for Early Jurassic Rare-Metal Polymetallic Event显示文摘The Songpan-Garze Fold Belt (SGFB), located in theeastern part of the Tibet Plateau and west of the SichuanBasin, is an important pegmatite province in China. Somefamous pegmatite type deposits occur in the SGFB,including the Xuebaoding, Jiajika, Keeryin rare metaldeposits and Danba muscovite deposit (Li Jiankang et al.,2015). | FEI Guangchun TIAN Jingjing YANG Jiyi GAO Jianguo TANG Wenchun LI Jian GU Chenghui | 2018 | Acta Geologica Sinica(English Edition)2018，92，3： | 5 |
| 3 | Progastrin Stimulates Colonic Cell Proliferation via CCKBR- and β-Arrestin–Dependent Suppression of BMP2显示文摘 | Guangchun Jin C. Benedikt Westphalen Yoku Hayakawa Daniel L. Worthley Samuel Asfaha Xiangdong Yang Xiaowei Chen Yiling Si Hongshan Wang Yagnesh Tailor Richard A. Friedman Timothy C. Wang | 2013 | Gastroenterology2013，，： | 2 |
| 4 | Comparison of diagnostic accuracy between ^(18)F-FDG PET and PET/CT for pulmonary neoplasm显示文摘Aimed at comparing diagnostic accuracy of 18F-FDG PET with PET/CT for pulmonary neoplasm, a study based on multi-center clinical trial of the diagnoses, in randomized and semi-blind ways, was executed from January 2006 to June 2007. It included 55 patients, i.e. 16 with histopathologically proved lung tumors, 16 with tuberculosis and 23 with benign lesions (inflammation, pseudotumor, granuloma, fibrosis and others). The histopathologic and clinic results were served as reference standard. Statistical significances in pulmonary nodule diagnosis between 18F-FDG PET and PET/CT were determined with 95% confidence interval obtained by ROC analysis. The 18F-FDG PET detected lung neoplasm with a sensitivity of 87.5% (14/16), a specificity of 59.0% (23/39), an accuracy of 67.3% (37/55) and a positive-likelihood ratio of 2.13. The 18F-FDG PET/CT detected lung neoplasm with a sensitivity of 93.8% (15/16), a specificity of 61.5% (24/39), an accuracy of 70.9% (39/55) and a positive-likelihood ratio of 2.43. The area under curves (AUC) of 18F-FDG PET and PET/CT were 0.803±0.068 and 0.799±0.063, respectively. It can be concluded that the diagnostic accuracy for malignant pulmonary nodules between 18F-FDG PET and PET/CT was not statistically different. | CHEN Yangchun CHEN Ping TIAN Jiahe CAI Xin YE Guangchun DENG Huaifu YANG Xiaofeng | 2009 | Nuclear Science and Techniques2009，20，1： | 2 |
| 5 | Effect of consumption amount of lithium salt on the properties of LiFePO4/C cathode materials显示文摘 | Yang Limei Liang Guangchun Wang Li | 2010 | J Alloys Compd2010，496，12： | 1 |
| 6 | Global population estimate and conservation gap analysis for the Nordmann's Greenshank(Tringa guttifer)显示文摘Nordmann's Greenshank(Tringa guttifer)is a globally endangered species that has received little research attention.It is threatened by rapid habitat loss,an incomplete network of protected sites,and lack of long-term data on population dynamics.Citizen science data can be combined with survey data to support population estimation and conservation gap analysis.From 2020 to 2021,Nordmann's Greenshank was surveyed in Tiaozini,Xiaoyangkou,and Dongling on the southern coast of Jiangsu Province,China,and the global population of the species was re-evaluated using the data obtained.We integrated citizen science data from eBird and the China Bird Report from 2000 to 2020 with the survey results to identify important habitats harboring over 1%of its total population,and compared this data with existing protected areas to identify gaps in its global conservation.Our survey found that Tiaozini supported at least 1194 individuals.Consequently,its global population was reestimated to be 1500-2000.Moreover,45 important habitats were identified based on citizen data and survey results.Although 44.4%and 50.0%of the priority sites in the world and China,respectively,are located outside protected areas,the Conservation Effectiveness Index(C)is 68.4%and 71.1%,respectively,showing that the current coverage of protected areas for this part of its range is reasonable.This study presents the most complete and recent population data to date.Tiaozini is the most important migration stopover site for Nordmann's Greenshanks.The species is under threat in terms of breeding,wintering,and stopover sites.Therefore,we suggest improving monitoring,establishing new protected sites to complete the habitat protection network,and improving the effectiveness of existing habitat protection strategies,including further developing high tide roosting sites. | Ranxing Cao Waner Liang Jia Guo Hongyan Yang Lili Sun Qing Chen Tao Yu Sicheng Ren Cai Lu Guangchun Lei Yifei Jia | 2023 | Avian Research2023，14，2： | 0 |
| 7 | A Stable Isotope Approach to Determine Herbivorous Diets of Wintering Geese at Dongting Lake,China显示文摘The East Dongting Lake National Nature Reserve in China is listed as a Ramsar Wetlands due to its global significance for migratory waterbird conservation, especially for the geese. For example, more than 90% of East Asian population of the vulnerable Lesser White-fronted Goose(Anser erythropus), and large numbers of Bean Goose(Anser fabilis) and Greater White-fronted Goose(Anser albifrons) over winter here every year from October to the next March. However, the habitats and food quality of the wintering geese have been threatened by hydrological alternation due to the operation of the Three Gorges Dam. Understanding the diets of these geese is fundamental for their conservation. We used the stable isotopic ratios of the body tissues of three predominant goose species(i.e. Ans?er erythropus, Anser fabilis and Anser albifrons) and their potential diet items(6 grass species), and applied smooth transition autoregressive(SIAR) mixing models to quantify the contribution of different food items to their diets. The results showed that the δ13C values of the blood samples were significantly different from those of feather, and the difference was consistent for the three kinds of geese. These results indicated that clear dietary shifts from their breeding place at the Arctic to the wintering place at Dongting Lake. The δ13C values of the blood samples of the geese showed there were no significant difference(ANOVA, p=0.265) suggesting that they share the same food sources at Dongting Lake. Moreover, the multiple-source mixing models(i.e. SIAR model) indicated that no single plant had a contribution greater than 35% to the diet of geese at 0.95 confident levels(0.50 and 0.95 credibility intervals of the posterior distributions range from 0.24-0.25 and 0.32-0.34, respectively). The results indicated that the geese had no preference for a particular plant. The findings suggested that the features at patch level(e.g. vegetation greenness and development stage) but not plant species might be the decisive factor in the habitat selection of the geese. Therefore,the management actions aiming to maintain habitat quality were critical for the waterbird conservation in Dongting Lake. | GUAN Lei MAZUMDER Debashish YANG Xiaoxue WEN Li WANG Yuyu LEI Jialin LEI Guangchun | 2016 | 湿地科学2016，14，3： | 0 |
| 8 | Contact Stress Reliability Analysis Model for Cylindrical Gear with Circular Arc Tooth Trace Based on an Improved Metamodel显示文摘Although there is currently no unified standard theoretical formula for calculating the contact stress of cylindrical gears with a circular arc tooth trace(referred to as CATT gear),a mathematical model for determining the contact stress of CATT gear is essential for studying how parameters affect its contact stress and building the contact stress limit state equation for contact stress reliability analysis.In this study,a mathematical relationship between design parameters and contact stress is formulated using the KrigingMetamodel.To enhance the model’s accuracy,we propose a new hybrid algorithm that merges the genetic algorithm with the Quantum Particle Swarm optimization algorithm,leveraging the strengths of each.Additionally,the“parental inheritance+self-learning”optimization model is used to fine-tune the KrigingMetamodel’s parameters.Following this,amathematicalmodel for calculating the contact stress of Variable Hyperbolic Circular-Arc-Tooth-Trace(VH-CATT)gears using the optimized Kriging model was developed.We then examined how different gear parameters affect the VH-CATT gears’contact stress.Our simulation results show:(1)Improvements in R2,RMSE,and RMAE.R2 rose from0.9852 to 0.9974(a 1.22%increase),nearing 1,suggesting the optimized Kriging Metamodel’s global error is minimized.Meanwhile,RMSE dropped from3.9210 to 1.6492,a decline of 57.94%.The global error of the GA-IQPSO-Kriging algorithm was also reduced,with RMAE decreasing by 58.69%from 0.1823 to 0.0753,showing the algorithm’s enhanced precision.In a comparison of ten experimental groups selected randomly,the GA-IQPSO-Kriging and FEM-based contact analysis methods were used to measure contact stress.Results revealed a maximum error of 12.11667 MPA,which represents 2.85%of the real value.(2)Several factors,including the pressure angle,tooth width,modulus,and tooth line radius,are inversely related to contact stress.The descending order of their impact on the contact stress is:tooth line radius>modulus>pressure angle>tooth width.(3)Complex interactions are noted among various parameters.Specifically,when the tooth line radius interacts with parameters such as pressure angle,tooth width,and modulus,the resulting stress contour is nonlinear,showcasing amultifaceted contour plane.However,when tooth width,modulus,and pressure angle interact,the stress contour is nearly linear,and the contour plane is simpler,indicating a weaker coupling among these factors. | Qi Zhang Zhixin Chen Yang Wu Guoqi Xiang Guang Wen Xuegang Zhang Yongchun Xie Guangchun Yang | 2024 | Computer Modeling in Engineering & Sciences2024，140，7： | 0 |
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