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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 | SHRIMP U-Pb zircon age,geochemistry and Nd-Hf isotope of Neoproterozoic mafic dyke swarms in western Sichuan:Petrogenesis and tectonic significance显示文摘Neoproterozoic magmatic rocks are widespread in the western margin of the Yangtze block, and their origin and genesis have significant implications for understanding the evolution of the Rodinia super- continent. However, there are currently two opposing interpretations for their petrogenesis and tectonic setting: mantle plume-related and island arc origin. To further verify these two competing models, SHRIMP U-Pb zircon age determinations and geochemical and Nd-Hf isotopic analyses are conducted on the mafic dykes in the Kangdian Rift, western Sichuan. U-Pb dating suggests that these mafic dykes were emplaced at 780―760 Ma, spatially and temporally coeval with the Kangding granitoid complex. The parental magmas of these dykes were derived from a depleted asthenosphere mantle source likely triggered by an anomalously-hot mantle plume. Despite some arc-geochemical features caused by variable degrees of contamination of young island arc crust during magma ascending and emplace- ment, they show general geochemical and Nd-Hf isotopic features similar to those of the intraplate basalts. Our results support the reconstruction model of Rodinia in which the South China block was located between Australia and Laurentia. | LIN GuangChun LI XianHua LI WuXian | 2007 | Science China Earth Sciences2007，50，1： | 43 |
| 3 | Effects of Temperature,Soil Moisture,Soil Type and Their Interactions on Soil Carbon Mineralization in Zoigê Alpine Wetland,Qinghai-Tibet Plateau显示文摘Wetland stores substantial amount of carbon and may contribute greatly to global climate change debate. However, few researches have focused on the effects of global climate change on carbon mineralization in Zoigê al-pine wetland, Qinghai-Tibet Plateau, which is one of the most important peatlands in China. Through incubation ex-periment, this paper studied the effects of temperature, soil moisture, soil type (marsh soil and peat soil) and their in-teractions on CO2 and CH4 emission rates in Zoigê alpine wetland. Results show that when the temperature rises from 5℃ to 35℃, CO2 emission rates increase by 3.3-3.7 times and 2.4-2.6 times under non-inundation treatment, and by 2.2-2.3 times and 4.1-4.3 times under inundation treatment in marsh soil and peat soil, respectively. Compared with non-inundation treatment, CO2 emission rates decrease by 6%-44%, 20%-60% in marsh soil and peat soil, respec-tively, under inundation treatment. CO2 emission rate is significantly affected by the combined effects of the tempera-ture and soil type (p < 0.001), and soil moisture and soil type (p < 0.001), and CH4 emission rate was significantly af-fected by the interaction of the temperature and soil moisture (p < 0.001). Q10 values for CO2 emission rate are higher at the range of 5℃-25℃ than 25℃-35℃, indicating that carbon mineralization is more sensitive at low temperature in Zoigê alpine wetland. | GAO Junqin OUYANG Hua LEI Guangchun XU Xingliang ZHANG Mingxiang | 2011 | Chinese Geographical Science2011，21，1： | 23 |
| 4 | A Hybrid Forecasting Framework Based on Support Vector Regression with a Modified Genetic Algorithm and a Random Forest for Traffic Flow Prediction显示文摘The ability to perform short-term traffic flow forecasting is a crucial component of intelligent transportation systems. However, accurate and reliable traffic flow forecasting is still a significant issue due to the complexity and variability of real traffic systems. To improve the accuracy of short-term traffic flow forecasting, this paper presents a novel hybrid prediction framework based on Support Vector Regression(SVR) that uses a Random Forest(RF) to select the most informative feature subset and an enhanced Genetic Algorithm(GA) with chaotic characteristics to identify the optimal forecasting model parameters. The framework is evaluated with real-world traffic data collected from eight sensors located near the I-605 interstate highway in California. Results show that the proposed RFCGASVR model achieves better performance than other methods. | Lizong Zhang Nawaf R Alharbe Guangchun Luo Zhiyuan Yao Ying Li | 2018 | Tsinghua Science and Technology2018，23，4： | 19 |
| 5 | Chronology and Crust-Mantle Mixing of Ore-forming Porphyry of the Bangongco: Evidence from Zircon U-Pb Age and Hf Isotopes of the Naruo Porphyry Copper-Gold Deposit显示文摘The Naruo porphyry copper-gold deposit(hereinafter referred to as the Naruo deposit) in Tibet is a potentially ultra-large, typical gold-rich porphyry copper deposit, which was recently discovered in the Bangongco-Nujiang metallogenic belt. This study analyzed U-Pb chronology and Hf isotopes of the ore-bearing granodiorite porphyry in the Naruo deposit using the LA-ICPMS dating technique. The results show that the weighted average age is 124.03±0.94Ma(MSWD=1.7, n=20), and 206Pb/238 U isochron age is 126.2±2.7 Ma(MSWD=1.02, n=20), both of which are within the error. The weighted average age represents the crystallization age of the granodiorite porphyry, which indicates that the ore-bearing porphyry in the Naruo deposit area was formed in the Early Cretaceous and further implies that the Neo-tethys Ocean had not been closed before 124 Ma under a typical island-arc subduction environment. The εHf(t) of zircons from the granodiorite porphyry varies from 2.14 to 9.07, with an average of 5.18, and all zircons have εHf(t) values greater than 0; 176Hf/177 Hf ratio is relatively high(0.282725–0.282986). Combined with the zircon age―Hf isotope correlation diagram, the aforementioned data indicate that the source reservoir might be a region that is mixed with depleted mantle and ancient crust, which possibly contains more materials sourced from depleted mantle. Rock-forming ages and ore-forming ages of the Duolong ore concentrate area are 120–124 Ma and 118–119 Ma, respectively, which indicate 124–118 Ma represents the main rockforming and ore-forming stage within the area. The Naruo deposit is located in the north of the Bangongco-Nujiang suture, and it yielded a zircon LA-ICPMS age of 124.03 Ma. This indicates the Bangongco-Nujiang oceanic basin subducted towards the north at about 124 Ma, and the Neo-tethys Ocean had not been closed before the middle Early Cretaceous. It is possible that the crust-mantle mixing formed the series of large and giant porphyry copper-gold deposits in the Bangongco. | ZHOU Xiong FEI Guangchun ZHOU Yu WEN Chunqi ZHANG Yi YUE Xiangyuan | 2015 | Acta Geologica Sinica(English Edition)2015，89，1： | 12 |
| 6 | Sensitivity Analysis Based Multiple Objective Preform Die Shape Optimal Design in Metal Forging显示文摘多重客观预先形成设计优化被提出。finalforging 的形状和变丑一致性在多重目的被考虑。目的是优化形状和同时的最后的前进的变丑一致性以便更多高集成前进的期末考试的质量能被获得。全部的目的被形状和一致性目的用增加方法的重量装配。预先形成死形状被立方的 B 花键曲线介绍。B 花键曲线的控制点被用作设计变量。全部的客观功能,形状和一致性 sub-objectivefunction 的形式被给。关于设计变量的全部的客观功能和 sub-objectivefunctions 的敏感被开发。用这个方法,预先形成死一个塑造 H 的前进过程的形状最佳地被设计。优化结果是很令人满意的。 | Xinhai ZHAO Guoqun ZHAO Guangchun WANG Tonghai WANG | 2006 | Journal of Materials Science & Technology2006，22，2： | 10 |
| 7 | Contribution of citizen science towards cryptic species census: “many eyes” define wintering range of the Scaly-sided Merganser in China's Mainland显示文摘Background: Citizen science has tremendous potential in advancing scientific knowledge and improving natural resource management.To detect the wintering distribution of the endangered species Scaly-sided Merganser(Mergus squamatus), national wintering surveys were organized by China Birdwatching Association.Methods: The surveys of M.squamatus were conducted in three successive winters from 2014 to 2016.A total of 2019 people from 102 organizations participated in the surveys.With three groups of 13 environmental variables, species distribution model for its wintering distribution of each year was developed using random forest.Schoener's D index was used to compare the distribution of M.squamatus in 3 years.Results: Totally, 441, 634 and 1138 individuals of M.squamatus were recorded in 2014, 2015 and 2016 respectively.Two main sites in Dabie Mountain and East Qinling mountains were verified and the wintering range of M.squamatus was defined.The wintering range was found to be highly identical for the 3 years.Conclusions: The highly overlapped distribution range among years suggested that the wintering range of M.squamatus was relatively stable.Well organized and coordinated citizen science can be used to define distribution range and improve species conservation. | Qing Zeng Qian Wei Guangchun Lei | 2018 | Avian Research2018，9，1： | 7 |
| 8 | Hydrate agglomeration modeling and pipeline hydrate slurry flow behavior simulation显示文摘Dynamic modeling and numerical simulation of hydrate slurry flow behavior are of great importance to offshore hydrate management.For this purpose, a dynamic model of hydrate agglomeration was proposed in this paper.Based on population balance equation, the frame of the dynamic model was established first, which took both hydrate agglomeration and hydrate breakage into consideration.Then, the calculating methods of four key parameters involved in the dynamic model were given according to hydrate agglomeration dynamics.The four key parameters are collision frequency, agglomeration efficiency, breakage frequency and the size distribution of sub particles resulting from particle breakage.After the whole dynamic model was built, it was combined with several traditional solid–liquid flow models and then together solved by the CFD software FLUENT 14.5.Finally, using this method, the influences of flow rate and hydrate volume fraction on hydrate particle size distribution, hydrate volume concentration distribution and pipeline pressure drop were simulated and analyzed. | Guangchun Song Yuxing Li Wuchang Wang Kai Jiang Zhengzhuo Shi Shupeng Yao | 2019 | Chinese Journal of Chemical Engineering2019，27，1： | 6 |
| 9 | Location Prediction on Trajectory Data: A Review显示文摘Location prediction is the key technique in many location based services including route navigation, dining location recommendations, and traffic planning and control, to mention a few. This survey provides a comprehensive overview of location prediction, including basic definitions and concepts, algorithms, and applications. First, we introduce the types of trajectory data and related basic concepts. Then, we review existing location-prediction methods, ranging from temporal-pattern-based prediction to spatiotemporal-pattern-based prediction. We also discuss and analyze the advantages and disadvantages of these algorithms and briefly summarize current applications of location prediction in diverse fields. Finally, we identify the potential challenges and future research directions in location prediction. | Ruizhi Wu Guangchun Luo Junming Shao Ling Tian Chengzong Peng | 2018 | Big Data Mining and Analytics2018，1，2： | 5 |
| 10 | 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 |
| 11 | Noise Reduction for Images with Non-uniform Noise Using Adaptive Block Matching 3D Filtering显示文摘Noise reduction is a very important topic in image processing. We propose a new method to deal with the case where the noisy image has different noise levels in different regions. The main idea is to segment automatically the noisy image into several sub-images so that each sub-image has approximately the same noise level. We perform Block matching 3D filtering(BM3D) to these subimages in order to obtain denoised sub-images. We then merge sub-images together and enhance the discontinuous regions between the sub-images by performing BM3D again on small image patches. Our experimental results show the effectiveness of this proposed method in terms of Peak signal to noise ratio(PSNR) when compared with the bivariate wavelet shrinkage and the standard BM3D method. In addition to Gaussian white noise, our method performs better than the bivariate wavelet shrinkage and the standard BM3D method even for signal dependent noise. | CHEN Guangyi LUO Guangchun TIAN Ling CHEN Aiguo | 2017 | Chinese Journal of Electronics2017，26，6： | 4 |
| 12 | Aboveground biomass and its spatial distribution pattern of herbaceous marsh vegetation in China显示文摘Herbaceous marsh is the most widely distributed type of marsh wetland ecosystem,and has important ecological functions such as water conservation,climate regulation,carbon storage and fixation,and sheltering rare species.The carbon sequestration function of herbaceous marsh plays a key role in slowing climate warming and maintaining regional environmental stability.Vegetation biomass is an important index reflecting the carbon sequestration capacity of wetlands.Investigating the biomass of marsh vegetation can provide a scientific basis for estimating the carbon storage and carbon sequestration capacity of marshes.Based on field survey data of aboveground biomass of herbaceous marsh vegetation and the distribution data set of marsh in China,we analyzed the aboveground biomass and its spatial distribution pattern of herbaceous marsh on a national scale for the first time.The results showed that in China the total area of herbaceous marsh was 9.7×10^(4) km^(2),the average density of aboveground biomass of herbaceous marsh vegetation was 227.5±23.0 g C m-2(95%confidence interval,the same below),and the total aboveground biomass was 22.2±2.2 Tg C(1 Tg=1012 g).The aboveground biomass density of herbaceous marsh vegetation is generally low in Northeast China and the Tibetan Plateau,and high in central North China and coastal regions in China.In different marsh distribution regions of China,the average biomass density of herbaceous marsh vegetation from small to large was as follows:temperate humid and semi-humid marsh region(182.3±49.3 g C m^(-2)) | Xiangjin SHEN Ming JIANG Xianguo LU Xingtu LIU Bo LIU Jiaqi ZHANG Xianwei WANG Shouzheng TONG Guangchun LEI Shengzhong WANG Chuan TONG Hangqing FAN Kun TIAN Xiaolong WANG Yuanman HU Yonghong XIE Muyuan MA Shuwen ZHANG Chunxiang CAO Zhichen WANG | 2021 | Science China Earth Sciences2021，64，7： | 4 |
| 13 | Microstructure, cold rolling, heat treatment, and mechanical properties of Mg-Li alloys显示文摘The magnesium-lithium (Mg-Li) alloy exhibits two phase structures between 5.7wt% and 10.3wt% Li contents, consisting of the α (hcp) Mg-rich and the β (bcc) Li-rich phases, at room temperature. In the experiment, Mg-5Li-2Zn, Mg-9Li-2Zn, Mg-16Li-2Zn, Mg-22Li-2Zn, Mg-5Li-2Zn-2Ca, Mg-9Li-2Zn-2Ca, Mg-16Li-2Zn-2Ca, and Mg-22Li-2Zn-2Ca (wt%) were melted. During the melting process, the flux, which was composed of lithium chloride (LiCl) and lithium fluoride (LiF) in the proportion of 3:1 (mass ratio) and argon gas were used to protect the alloys from oxidation. The microstructure, mechanical properties, and cold-rolling workability of the wrought alloys were studied. The crystal grain of the alloys (adding Ga) is fine. The hardness of the studied alloys decreases with an increase in element Li. The density of the studied alloys is in the range of 1.187 to 1.617 g/cm3. The reduction of the Mg-16Li-2Zn and Mg-22Li-2Zn alloys can exceed 85% at room temperature. The Mg-9Li-2Zn-2Ca alloy was heat treated at 300°C for 8, 12, 16, and 24 h, respectively. The optimum heat treatment of the Mg-9Li-2Zn-2Ca alloy is 300°C×12h by metallographic observation and by studying the mechanical properties of the alloys. | Haibin Ji Guangchun Yao Hongbin Li | 2008 | Journal of University of Science and Technology Beijing2008，15，4： | 3 |
| 14 | Manifestation of Traditional Cultures in Classical Chinese and Korean Gardens显示文摘Classical garden as a kind of comprehensive art embodies a nation's culture and spirit, and culture has a direct impact on the style of classical gardens in the same period. Traditional Chinese and Korean gardens have intimate connection with each other and have their own unique systems. Also it is no exception in culture, that is, similar traditional cultures have different manifestations in their respective classical gardens. This study analyzes different manifestations of yin and yang and Five Elements Theory, thought of immortals and Confucianism in classical gardens of China and Korea. | REN Guangchun KIM Tae-kyung | 2013 | Journal of Landscape Research2013，5，Z1： | 3 |
| 15 | Compressive and energy absorption properties of closed-cell magnesium foams显示文摘The quasi-static compressive mechanical behavior and deformation mechanism of closed-cell magnesium foams were studied,and the effects of the density of magnesium foams on the compressive and energy absorption properties were also discussed.The results show that the compressive process of closed-cell magnesium foams is characterized by three deformation stages:linear elastic stage,collapsing stage and densification stage.At the linear elastic stage,the peak compressive strength(σ0) and Young's modulus(E0) increase as the density increases.Magnesium foams can absorb energy at the collapsing stage.In a certain strain range,the energy absorption capacity also increases as the density of magnesium foams increases. | JI Haibin,YAO Guangchun,LUO Hongjie,ZU Guoyin,and LIU Letian School of Material and Metallurgy,Northeastern University,Shenyang 110004,China | 2010 | Rare Metals2010，29，4： | 3 |
| 16 | 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 |
| 17 | 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 |
| 18 | Review of Learning-assisted Power System Optimization显示文摘With dramatic breakthroughs in recent years,machine learning is showing great potential to upgrade the toolbox for power system optimization.Understanding the strength and limitation of machine learning approaches is crucial to decide when and how to deploy them to boost the optimization performance.This paper pays special attention to the coordination between machine learning approaches and optimization models,and carefully evaluates how such data-driven analysis may improve the rule-based optimization.The typical references are selected and categorized into four groups:the boundary parameter improvement,the optimization option selection,the surrogate model,and the hybrid model.This taxonomy provides a novel perspective to elaborate the latest research progress and development.We further compare the design patterns of different categories,and discuss several key challenges and opportunities as well.Deep integration between machine learning approaches and optimization models is expected to become the most promising technical trend. | Guangchun Ruan Haiwang Zhong Guanglun Zhang Yiliu He Xuan Wang Tianjiao Pu | 2021 | CSEE Journal of Power and Energy Systems2021，7，2： | 2 |
| 19 | Water regulation: a Sword of Damocles for migratory waterbirds in China?显示文摘Dams and reservoirs,regulating water levels for irrigation,hydropower and flood control,are sometimes considered as artificial managed wetlands.Recent research has shown that increased water surface of reservoirs have become habitats for some species of migratory waterbird.However,hydraulic engineering can be a Sword of Damocles for birds.Regulating water levels may dramatically alter a wetland | Yifei Jia Guangchun Lei Xiubo Yu | 2017 | Science China(Life Sciences)2017，60，5： | 2 |
| 20 | A rapid design and manufacturing system for product development applications显示文摘 | WANG Guangchun | 2004 | Rapid Prototyping Journal2004，10，： | 1 |
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