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| 1 | Carbon Dioxide, Methane, and Nitrous Oxide Emissions from a Rice-Wheat Rotation as Affected by Crop Residue Incorporation and Temperature显示文摘Field measurements were made from June 2001 to May 2002 to evaluate the e?ect of crop residue application and temperature on CO2, CH4, and N2O emissions within an entire rice-wheat rotation season. Rapeseed cake and wheat straw were incorporated into the soil at a rate of 2.25 t hm?2 when the rice crop was transplanted in June 2001. Compared with the control, the incorporation of rapeseed cake enhanced the emissions of CO2, CH4, and N2O in the rice-growing season by 12.3%, 252.3%, and 17.5%, respectively, while no further e?ect was held on the emissions of CO2 and N2O in the following wheat- growing season. The incorporation of wheat straw enhanced the emissions of CO2 and CH4 by 7.1% and 249.6%, respectively, but reduced the N2O emission by 18.8% in the rice-growing season. Signi?cant reductions of 17.8% for the CO2 and of 12.9% for the N2O emission were observed in the following wheat- growing season. A positive correlation existed between the emissions of N2O and CO2 (R2 = 0.445,n = 73,p < 0.001) from the rice-growing season when N2O was emitted. A trade-o? relationship between the emissions of CH4 and N2O was found in the rice-growing season. The CH4 emission was signi?cantly correlated with the CO2 emission for the period from rice transplantation to ?eld drainage, but not for the entire rice-growing season. In addition, air temperature was found to regulate the CO2 emissions from the non-waterlogged period over the entire rice-wheat rotation season and the N2O emissions from the non- waterlogged period of the rice-growing season, which can be quantitatively described by an exponential function. The temperature coe?cient (Q10) was then evaluated to be 2.3±0.2 for the CO2 emission and 3.9±0.4 for the N2O emission, respectively. | ZOU Jianwen(邹建文) HUANG Yao(黄耀) ZONG Lianggang(宗良纲) ZHENG Xunhua(郑循华) WANG Yuesi(王跃思) | 2004 | Advances in Atmospheric Sciences2004,21,5: | 29 |
| 2 | Characteristics of Meso-Cenozoic Igneous Complexes in the South Yellow Sea Basin,Lower Yangtze Craton of Eastern China and the Tectonic Setting显示文摘The South Yellow Sea Basin is partially surrounded by the East Asian continental MesoCenozoic widespread igneous rocks belt.Magnetic anomaly and multi-channel seismic data both reveal the prevalent occurrence of igneous rocks.We preliminarily defined the coupling relation between magnetic anomalies and igneous rock bodies.Some igneous complexes were also recognized by using multi-channel seismic and drilling data.We identified various intrusive and extrusive igneous rock bodies,such as stocks,sills,dikes,laccoliths and volcanic edifice relics through seismic facies analysis.We also forecasted the distribution characteristics of igneous complexes.More than fifty hypabyssal intrusions and volcanic relics were delineated based on the interpretation of magnetic anomaly and dense intersecting multi-channel seismic data.It is an important supplement to regional geology and basin evolution research.Spatial matching relations between igneous rock belts and fractures document that extensional N-E and N-NE-trending deep fractures may be effective pathways for magma intrusion.These fractures formed under the influence of regional extension during the MesoCenozoic after the Indosinian movement.Isotopic ages and crosscutting relations between igneous rock bodies and the surrounding bedded sedimentary strata both indicate that igneous activities might have initiated during the Late Jurassic,peaked in the Early Cretaceous,gradually weakened in the Late Cretaceous,and continued until the Miocene.Combined with previous studies,it is considered that the Meso-Cenozoic igneous activities,especially the intensive igneous activity of the Early Cretaceous,are closely associated with the subduction of the Paleo-Pacific Plate. | PANG Yumao ZHANG Xunhua XIAO Guolin GUO Xingwei WEN Zhenhe WU Zhiqiang ZHU Xiaoqing | 2017 | Acta Geologica Sinica(English Edition)2017,91,3: | 15 |
| 3 | Basin modeling in the initial stage of exploration: a case study from the North Subbasin of the South Yellow Sea Basin显示文摘Basin modeling has become an important tool for analyzing sedimentary basins. The North Subbasin of the South Yellow Sea Basin is filled with thick Meso-Cenozoic terrigenous deposits during the rift evolution stage. The accumulation of data and achievements of geological investigations in recent years have provided the preconditions for basin modeling. The necessary parameters and geological elements for simulations are collated and summarized. Modeling of tectono-thermal evolution is performed and the related trend in heat flow is reconstructed and calibrated. The heat flow value commences from an average level of 61 m W/m^2 during MiddleLate Jurassic, rises to about 80 m W/m^2 from circa 145 Ma to circa 74 Ma, and then undergoes a gradual decline to65 m W/m^2 until the end of Oligocene.Three evolutionary phases, namely, the initial rifting phase, syn-rifting phase, and post-rifting phase, have been identified. The modeling results show that the North Subbasin generally enters into a stage of strong rifting during Cretaceous and undergoes rapid subsidence until the Late Cretaceous,then follows by a stage of moderate rifting during the Paleogene. The input and general workflow involved in 3-D modeling are introduced. Reconstruction of the petroleum system in the North Subbasin reveals that the threshold depth of hydrocarbon generation is located near the top of the Paleogene Funing formation, and the underlying Jurassic and Cretaceous source rocks have reached or exceeded peak oil generation and have almost completed the generation and expulsion of hydrocarbons. The main generation and expulsion in the Jurassic source rocks take place during the syn-rifting and post-rifting phases, whereas the peak generation and expulsion in the Cretaceous and Paleogene source rocks take place during the post-rifting phase. Although the study area is still a relatively less explored sedimentary basin, the results of modeling can provide valuable information for exploration. A preliminary discussion of the main uncertainty factors is also presented. | PANG Yumao ZHANG Xunhua GUO Xingwei XIAO Guolin HAN Zuozhen | 2017 | Acta Oceanologica Sinica2017,36,9: | 10 |
| 4 | Modeling and simulation of bow wave effect in probe and drogue aerial refueling显示文摘In a probe and drogue aerial refueling system, the bow wave of the receiver aircraft will produce a strong aerodynamic effect on the drogue once the receiver follows the drogue at a close distance. It is a major difficulty of docking control in the probe and drogue refueling. This paper analyses the bow wave effect and presents a simple method to model it. Firstly, the inviscid flow around the receiver is modeled based on the stream function defined by basic stream singularities.Secondly, a correction function is developed to eliminate the error caused by the absence of air viscosity. Then, the aerodynamic coefficients are used to calculate the induced aerodynamic force on the drogue. The obtained model is in an analytical form that can be easily applied to the controller design and the real-time simulations. In the verification part, computational fluid dynamics(CFD)simulation tests are conducted to validate the obtained flow fields and aerodynamic forces. Finally,the modeling method is applied to an F-16 receiver aircraft in a previously developed autonomous aerial refueling simulation system. The simulations results are analyzed and compared with the NASA flight-test data, which demonstrates the effectiveness of the proposed method. | Dai Xunhua Wei Zibo Quan Quan | 2016 | Chinese Journal of Aeronautics2016,29,2: | 9 |
| 5 | Users Intention for Continuous Usage of Mobile News Apps:the Roles of Quality,Switching Costs,and Personalization显示文摘Mobile news apps have emerged as a significant means for learning about latest news and trends. However, in light of numerous news apps and information overload, motivating users to adopt one app is a major concern for both the industry and academia. Therefore, considering the attributes of mobile news and the debate on switching costs in the Internet context, based on the expectation-confirmation model (ECM), this study suggests that switching costs still exist and have a significant moderating effect on user satisfaction and continuous usage of mobile news apps. Furthermore, the different influences of information quality, system quality and service quality on continuance intention, user satisfaction and switching costs are discussed, showing that quality of information has a significant impact on users’ continuous usage of mobile news apps through increasing perceived usefulness, whereas personalized service quality have stronger effects through increasing user satisfaction and switching costs. | Qiongwei Ye Yumei Luo Guoqing Chen Xunhua Guo Qiang Wei Shuyan Tan | 2019 | Journal of Systems Science and Systems Engineering2019,28,1: | 3 |
| 6 | New insights into marine hydrocarbon geological conditions in the South Yellow Sea Basin:evidence from borehole CSDP-2显示文摘The South Yellow Sea Basin(SYSB) has multiple sets of proven source rocks and good hydrocarbon prospects,but no industrial oil and gas has been explored at present.To solve this puzzle for petroleum geologists,we systematically investigated the marine hydrocarbon geological conditions based on cores and testing data from borehole CSDP-2,the first exploration well with continuous coring in SYSB.The qualities of source rocks are evaluated in detail according to organic matter abundance,type,and maturity.The reservoir characterization mainly includes porosity,permeability,and reservoir space.Displacement pressure test and stratum thickness are the main foundations for defining the caprocks.Then,the oil-source rock correlation in the Permian and stratum model are analyzed to determine the favorable source-reservoir-caprock assemblages.The results show that three sets of effective source rocks(the Lower Triassic,Upper Permian,and Lower Permian),two sets of tight sandstone re servoirs(the Upper Permian and Lower Silurian-Upper Devonian),and two sets of caprocks(the Lower Triassic and Carboniferous) combine to constitute the hydrocarbon reservoir-forming as se mblages of 'lower-ge neration and upper-accumlation' and 'self-generation and self-accumlation',thus laying a solid foundation for promising petroleum prospects.The three sets of marine source rocks are characterized by successive generation and expulsion stages,which guarantees multistage hydrocarbon accumulation.Another three sets of continental source rocks distributed across the Middle Jurassic,Upper Cretaceous,and Paleogene depression areas,especially in the Northern Depression,may supplement some hydrocarbons for the Central Uplift through faults and the Indosinian unconformity.The favorable Permian exploration strata have been identified in the Central Uplift of SYSB.First,the Lower Permian and Upper Permian source rocks with high organic matter abundance and high thermal maturity supply sufficient hydrocarbons.Secondly,the interbedding relationship between the source rocks and sandstones in the Upper Permian strata ensures that hydrocarbons have been migrated into the nearby Upper Permian sandstones,reflecting near-source hydrocarbon accumulation.Finally,the good sealing property of the Lower Triassic Qinglong Formation caprocks plays an indispensable role in hydrocarbon preservation of the Permian reservoirs.This conclusion is supported by direct oil shows,gas logging anomalous layers,and hydrocarbon-bearing fluid inclusions. | CAI Laixing XIAO Guolin ZENG Zhigang ZHANG Xunhua GUO Xingwei WANG Shuping | 2020 | Journal of Oceanology and Limnology2020,38,4: | 3 |
| 7 | Essentials of the Construction of an Ecological Civilization显示文摘建设生态文明,必须要在社会生产力发展中顺应自然,注重人的文明发展,保护自然生态系统,遵循生态经济规律要求进行社会再生产,把传统的机器大工业下高碳、线性的生产方式逐步转变为低碳、循环的生产方式,通过科学发展,满足人工生态系统良性循环要求。 | Zhang Xunhua Wang Yan | 2013 | Social Sciences in China2013,34,4: | 2 |
| 8 | Provenance and Tectonic Implications of Paleozoic Strata in the South Yellow Sea Basin, China-Revealed from the Borehole CSDP-2显示文摘Well CSDP-2 is a fully coring deep drilling hole, penetrating the thick Paleozoic marine strata in the South Yellow Sea Basin(SYSB) in the lower Yangtze Block(LYB). Based on the petrological and geochemical analysis of 40 sandstone samples from the core CSDP-2, the provenance and tectonic features of Paleozoic detrital rocks from SYSB are analyzed and systematically delineated in this article. The results show that the Silurian – Carboniferous sandstones are mature sublitharenite, while the Permian sandstones are unstable feldspathic litharenite. The average CIA(chemical index of alteration) is 74.61, which reflects these sediments were derived from source rocks with moderate chemical weathering. The REE(rare earth element) patterns are characterized by LREE enrichment, flat HREE and obviously negative Eu anomaly, which are similar to that of the upper continental crust. Dickinson QFL discrimination results indicate the recycled orogeny provenance. Various diagrams for the discrimination of sedimentary provenance based on major and trace element data show all the sediments were derived predominantly from quartz sedimentary rocks, of which the Permian strata contain more felsic sedimentary rocks. Geochemical data for these detrital rocks suggest they occur at the passive continental margin and island arc settings, and the Permian sandstone presents active continental margin setting. | GAO Xiaohui ZHANG Xunhua GUO Xingwei CAI Laixing HOU Fanghui ZHU Xiaoqing | 2020 | Journal of Ocean University of China2020,19,3: | 2 |
| 9 | Discussion about the Prognoses of Wilson's Disease with Severe Cortex Structure Impairment--A Case Report of Wilson's Disease (WD) Treated by the Traditional Chinese Medicine and Western Medicine显示文摘 | Songlin Chen Yingyin Liang Xiangxue Zhou Xunhua Li | 2010 | Journal of US-China Medical Science2010,7,4: | 2 |
| 10 | On the Tectonic Problems of the Southern East China Sea and Adjacent Regions:Evidence from Gravity and Magnetic Data显示文摘In this paper,two sets of gravity and magnetic data were used to study the tectonics of the southern East China Sea and Ryukyu trench-arc system:one data set was from the ‘Geological-geophysical map series of China Seas and adjacent areas' database and the other was newly collected by R/V Kexue III in 2011.Magnetic and gravity data were reorganized and processed using the software MMDP,MGDP and RGIS.In addition to the description of the anomaly patterns in different areas,deep and shallow structure studies were performed by using several kinds of calculation,including a spectrum analysis,upward-continuation of the Bouguer anomaly and horizontal derivatives of the total-field magnetic anomaly.The depth of the Moho and magnetic basement were calculated.Based on the above work,several controversial tectonic problems were discussed.Compared to the shelf area and Ryukyu Arc,the Okinawa Trough has an obviously thinned crust,with the thinnest area having thickness less than 14 km in the southern part.The Taiwan-Sinzi belt,which terminates to the south by the NW-SE trending Miyako fault belt,contains the relic volcanic arc formed by the splitting of the paleo Ryukyu volcanic arc as a result of the opening of the Okinawa Trough.As an important tectonic boundary,the strike-slip type Miyako fault belt extends northwestward into the shelf area and consists of several discontinuous segments.A forearc terrace composed of an exotic terrane collided with the Ryukyu Arc following the subduction of the Philippine Sea Plate.Mesozoic strata of varying thicknesses exist beneath the Cenozoic strata in the shelf basin and significantly influence the magnetic pattern of this area.The gravity and magnetic data support the existence of a Great East China Sea,which suggests that the entire southern East China Sea shelf area was a basin in the Mesozoic without alternatively arranged uplifts and depressions,and might have extended southwestward and connected with the northern South China Sea shelf basin. | SHANG Luning ZHANG Xunhua HAN Bo DU Runlin | 2016 | Journal of Ocean University of China2016,15,1: | 2 |
| 11 | Nitrous oxide and nitric oxide emissions from an irrigated cotton field in Northern China显示文摘 | Chunyan Liu Xunhua Zheng Zaixing Zhou Shenghui Han Yinghong Wang Kai Wang Wangguo Liang Ming Li Deli Chen Zhiping Yang | 2010 | 2010 (1-2)2010,,1: | 2 |
| 12 | Nitric oxide emissions from conventional vegetable fields in southeastern China显示文摘 | Baoling Mei Xunhua Zheng Baohua Xie Haibo Dong Zaixing Zhou Rui Wang Jia Deng Feng Cui Huajun Tong Jianguo Zhu | 2009 | Atmospheric Environment2009,,17: | 2 |
| 13 | Nitrous oxide emissions as influenced by amendment of plant residues with different C:N ratios显示文摘 | Yao Huang Jianwen Zou Xunhua Zheng Yuesi Wang Xingkai Xu | 2004 | Soil Biology and Biochemistry2004,,6: | 2 |
| 14 | Genetic and structural analyses suggest that a novel SPG3A mutation causes severe phenotypes of hereditary spastic paraplegia显示文摘Hereditary spastic paraplegia (HSP) is a group of neurodegenerative diseases. The genotypes and phenotypes of HSP are extremely heterogenous. SPG3A is one of the identified genes underlying HSP, and codes for a GTPase, atlastin. Mutations in SPG3A are currently believed to be associated with early onset and mild phenotypes. And most structura predictions could not detect gross changes in the mutant protein. However, in a severely affected HSP family we have identified a novel SPG3A mutation, c.1228G>A (p.G410R), in a Tibetan kindred. The mutation occurred at the highly conserved nucleotide and co-segregated with the disease, and was absent in the control subjects. Structural predictions showed that the Tibetan mutation occurred at the linking part between the guanylate-binding protein domain (GB, the ball region) and the transmembrane helices (TM, the rod region) at the start point of an α-helix, which may disrupt the helix, and cause changes in the overall structure of the transmembrane region of the molecule. Our results indicate that severe pheno- types can also arise from SPG3A mutations and the linking part of the guanylate-binding protein domainand the transmembrane helices might be crucial in determining the severity of the disease. This paper not only presents the first SPG3A mutational report from the Chinese population, but also provides po- tential evidence for a possible correlation between the severity of the phenotypes of HSP with the ex- tension of the changes in the protein structures of atlastin. | CHEN Suqin ZHOU Yan LI Xunhua Labu HUANG Shuang HUANG Weijun ZHOU Chunlong MAXWELL Patrick H WANG Yiming | 2006 | Chinese Science Bulletin2006,51,16: | 2 |
| 15 | Methane emission from a simulated rice field ecosystem as influenced by hydroquinone and dicyandiamide显示文摘 | XU Xingkai WANG Yuesi ZHENG Xunhua | 2000 | The Science of the Total Environment2000,263,: | 1 |
| 16 | impacts of soil moisture on nitrous oxide emission from croplands: a case study on the rice based agroecosystem in Southeast China 显示文摘 | ZHENG XUNHUA WANG MINGXING WANG YUESI | 2000 | Chemosphere Global Change Science2000,2,: | 1 |
| 17 | Internet diffusion in Chinese companies显示文摘 | Guo Xunhua Chen Guoqing | 2005 | Communication of the ACM2005,48,4: | 1 |
| 18 | Effects of environmental factors on N2O emission from and CH4 uptake by the typical grasslands in the Inner Mongolia显示文摘 | Wang Yuesi Xue Min Zheng Xunhua | 2005 | Chemosphere2005,58,: | 1 |
| 19 | Nitric oxide emissions from conventional vegetable fields in southeastern China显示文摘 | Baoling Mei Xunhua Zheng Baohua Xie Haibo Dong Zaixing Zhou Rui Wang Jia Deng Feng Cui Huajun Tong Jianguo Zhu | 2009 | Atmospheric Environment2009,,17: | 1 |
| 20 | Vapor phase dehydrogenation of methanol to methyl formate in the catalytic membrane reactor with Cu/SiO2/ceramic composite membrane显示文摘 | Guo Yanglong Lu Guanzhong Mo Xunhua | | 0,,1: | 1 |