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18篇 您的检索式:作者名="Changgui Liu"
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1Reappraisement and refinement of zircon U-Pb isotope and trace element analyses by LA-ICP-MS显示文摘A protocol was established for simultaneous measurements of zircon U-Pb ages and trace elements by LA-ICP-MS at spot sizes of 16 32 μm.This was accomplished by introducing N 2 into ICP to increase the sensitivity.The obtained U-Pb ages for zircon standards GJ-1,TEMORA and SK10-2 are consistent with the preferred values within about 1% uncertainty (2σ) by simple external calibration against zircon standard 91500.Different data reduction softwares could yield different uncertainties for calculation of U-Pb ages.The commercially available program GLITTER4.4 could apply an improper uncertainty calculation strategy,but it may yield artificial high precisions for single analyses.Our trace element analyses indicate that Si is not an ideal internal standard for zircon when calibrated against the NIST glasses.Calibration against the NIST glasses using Si as an internal standard,a systematic deviation of 10% 30% was found for most trace elements including Zr.However,the trace element compositions of zircon can be accurately measured by calibration against multiple reference materials with natural compositions (e.g.,BCR-2G,BHVO-2G and BIR-1G),or calibration against NIST SRM 610 and using Zr as an internal standard.Analyses of two pieces of GJ-1 demonstrate that it is relatively homogenous for most trace elements (except for Ti).LIU YongSheng HU ZhaoChu ZONG KeQing GAO ChangGui GAO Shan XU Juan CHEN HaiHong 2010Chinese Science Bulletin2010,55,15:1011
2Evaluation of asthma control: a questionnaire-based survey in China显示文摘Su Nan Lin Jiangtao Chen Ping Li Jing Wu Changgui Yin Kaisheng Liu Chuntao Chen Yiqiang Zhou Xin Yuan Yadong Huang Xingang 2014Chinese Medical Journal2014,,11:5
3In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard显示文摘Yongsheng Liu Zhaochu Hu Shan Gao Detlef Günther Juan Xu Changgui Gao Haihong Chen 2008Chemical Geology2008,,1:3
4Clinical and functional comparison of dynamic hip screws and intramedullary nails for treating proximal femur metastases in older individuals显示文摘Objective:To compare the outcomes of dynamic hip screws(DHS)and intramedullary nailing(IMN)in the treatment of extra-capsular metastatic carcinoma of the proximal femur.Methods:A retrospective case analysis method was used to examine data of patients with proximal metastatic cancer of the femur who were treated with internal fixation in Department of Orthopaedics,Beijing Friendship Hospital,from January 2007 to December 2018.Blood loss,postoperative pain,functional score,length of stay,and survival rates were compared,and postoperative complications were assessed.Results:Complete follow-up data were available for 33 patients.The mean follow-up period was 12.2±3.6(range:9-32)months and the average age was 72.3±4.7(range:59-83)years old.There were 20 females and 13 males.Twenty-three patients had undergone IMN and 10 DHS,according to bone defects and the patient’s overall condition.The median survival time was 10 months in the IMN group and 11 months in the DHS group.Duration of surgery(t=-7.366,P<0.001)and length of hospital stay(t=-3.509,P<0.001)differed significantly between the two groups.There was one case of breakage of internal fixation in the IMN group.Conclusions:There was no significant difference between DHS and IMN in terms of surgical efficacy.IMN and DHS were different in terms of surgical time and hospital stay.However,due to the limited number of cases in this study,multi-factor analysis has not been performed and needs to be further verified in future analysis.When developing a surgical plan,it is recommended to consider the patient’s condition and the surgeon’s experience.Hua Gao Xiaodong Bai Wentao Chen Yadong Li Liang Zhao Changgui Liu Zhenyu Liu Baojun Wang 2020Chinese Journal of Cancer Research2020,32,3:2
5In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard显示文摘Liu Yongsheng Hu Zhaochu Gao Shan Ganther D Xu Juan Gao Changgui Chen Haibong 0,,:1
6In situ U -Pb dating and trace element analysis of zircons in thin sections of eclo- gite:refining constraints on the ultra high-pressure metamorphism of the Sulu terrane, China 显示文摘Zong Keqing Liu Yongsheng Gao Changgui 2010Chemical Geology2010,269,34:1
7In situ analysis of major andtrace elements of anhydrous minerals by LA-ICP-MS withoutapplying an internal standard 显示文摘Liu Yongsheng Hu Zhaochu Gao Shan Günther D Xu Juan Gao Changgui Chen Haihong 2008Chem Geol2008,257,12:1
8Continental and oceanic crustrecycling-induced melt-peridotite interactions in theTrans-North China Orogen: U-Pb dating, Hf isotopes andtrace elements in zircons of mantle xenoliths 显示文摘Liu Yongsheng Gao Shan Hu Zhaochu Gao Changgui ZongKeqing Wang Dongbing 2010J Petrol2010,51,53:1
9In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard 显示文摘Liu Yongsheng Hu Zhaochu Gao Shan Gfintherc D Xu Juan Gao Changgui Chen Haihong 2008Chem Geol2008,257,12:1
10In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard 显示文摘Liu Yongsheng Hu Zhaochu Gac Shan Gtinther D Xu Juan Gan Changgui Chen Haihong 2008Chem Geol2008,257,12:1
11In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard显示文摘Yongsheng Liu Zhaochu Hu Shan Gao Detlef Günther Juan Xu Changgui Gao Haihong Chen 2008Chemical Geology2008,,1:1
12ln-situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard 显示文摘Liu Yongsheng Hu Zhaochu Gao Shah Gtinther D Xu Juan Gao Changgui Chen Haihong 2008Chemical Geology2008,257,12:1
13Formation conditions and accumulation characteristics of Bozhong 19-6 large condensate gas field in offshore Bohai Bay Basin显示文摘Based on the study of natural gas resource, low buried hill trap formation mechanism, high quality reservoir control factors and natural gas preservation conditions, the formation conditions and reservoir accumulation characteristics of Bozhong 19-6 large condensate gas field were summarized. Large gas generation potential of multiple sets of thick humic-sapropelic source rocks in high maturity stage in Bozhong depression was the basis of large gas field formation. The multi-stage tectonic evolution since Indosinian period formed large-scale buried hill traps. The Tanlu fault activity formed multi-type reservoirs, and buried hill metamorphic rock of Archean and sand-conglomerate of Kongdian Formation were high-quality reservoirs. Thick overpressure lacustrine mudstone and weak neotectonic movement provided good preservation conditions. Bozhong 19-6 gas reservoir was a condensate gas reservoir with very high condensate oil content, and the gas origin was humic-sapropelic and kerogen-cracking gas, and the gas field had large gas thickness, high gas column characteristics and the accumulation process was first oil and then gas. The buried hill reservoir was a massive reservoir and the Kongdian reservoir was a stratified reservoir. The gas field had multi-channel hydrocarbon intense charge from overpressure source rocks, atmospheric-weak overpressure reservoir favorable for accumulation, thick overpressure mudstone caprock favorable for preservation, and natural gas ultra-late rapid accumulation model.XU Changgui YU Haibo WANG Jun LIU Xiaojian 2019Petroleum Exploration and Development2019,46,1:1
14Melting-induced fluid flow during exhumation of gneisses of the Sulu ultrahigh-pressure terrane显示文摘Keqing Zong Yongsheng Liu Zhaochu Hu Timothy Kusky Dongbin Wang Changgui Gao Shan Gao Jianqi Wang 2010LITHOS2010,,3:1
15Superimposed characteristics and genetic mechanism of strike-slip faults in the Bohai Sea, China显示文摘Based on the 3 D seismic structure interpretation of Bohai Sea, combined with physical modeling of structure, structural style analysis and apatite fission track simulation, the structural characteristics and genetic mechanism of the Cenozoic strike-slip faults in Bohai Sea were investigated. The results show that Tanlu strike-slip fault experienced three stages of strike-slip activities in the Cenozoic,and the transition from left-lateral strike to right-lateral strike-slip was completed at the end of the fourth member of the Shahejie Formation. The strike-slip faults in the Bohai Sea have the characteristics of multi-stage and multi-strength stress superposition. According to the superimposed forms of different strengths, different properties and different ratios, they can be divided into three major genetic types,extension and strike-slip superimposition, extension and extrusion superimposition, extrusion and strike-slip superimposition, and fifteen typical structure patterns. Affected by multiple changes in the direction and rate of subduction of the Cenozoic Pacific plate, the difference between the Cenozoic extension and the strike-slip in the Bohai Sea area leads to the diversity of the fault system and the zoning of the depression structure. According to superimposition features of faults, the Bohai Sea area can be divided into the Liaoxi S-type weak strike-slip zone, Liaodong braided strong strike-slip zone, Boxi conjugated medium strike-slip zone, Bodong brush structure medium strike-slip zone and Bonan parallel strong strike-slip zone. These zones differ in oil and gas accumulation features.HU Zhiwei XU Changgui WANG Deying REN Jian LIU Yubo XIAO Shuguang ZHOU Xin 2019Petroleum Exploration and Development2019,46,2:1
16An improved window opening behavior model involving the division of the dummy variable’s interval level:Case study of an office building in Xi’an during summer显示文摘Window opening behavior significantly impacts indoor air quality,thermal comfort,and energy consumption.A field measurement was carried out in three typical rooms(a standard office,a meeting room and a smoking office)within an office building.The window state and the physical environment were continuously recorded during the measured periods.Three typical window opening behaviors were found in the measured samples,namely,active,moderate,and passive.The common logistic regression coefficient indicated that solar radiation exhibited the greatest effect on window opening behavior in the smoking office and standard office.Typically,window opening behavior in the meeting room was the most strongly correlated with time of the day,mainly because of the meeting schedule for occupants in the meeting room.This study discussed the dividing principles involved in setting the dummy variable interval level(discretizing continuous variables and dividing them into different intervals),and proposed a method to determine the optimal interval level of each variable.The improved model led to the increase in the prediction accuracy rate of the window being opened by 2.0%and 3.3%according to the comparison with the original model based on dummy variables and the common model based on continuous variables,respectively.This study can provide a reference value for simulating energy consumption in office buildings in the future.Yaxiu Gu Tingting Wang Qingqing Dong Zhuangzhuang Ma Tong Cui Changgui Hu Kun Liu Song Pan Qian Qi Minyan Xie 2023Building Simulation2023,16,11:0
17Glass-compatible and self-powered temperature alarm system by temperature-responsive organic manganese halides via backward energy transfer process显示文摘A pioneering glass-compatible transparent temperature alarm system self-powered by luminescent solar concentrators(LSCs) is reported.Single green-emitted organic manganese halides(OMHs) of PEA_(2)MnBr_(2)I_(2),which has a unique temperature-dependent backward energy transfer process from selftrapped state to^(4)T_(1)energy level of Mn,is used for triggering the temperature alarm.The LSC with redemitted CsPbI_(3)perovskite-polymer composite films on the glass substrate is used for power supply.The spectrally separated nature between the green-emitted OMHs for temperature alarm and red-emitted CsPbI3in LSC for power supply allows for probing the signal light of temperature-responsive OMHs without the interference of LSCs,making it possible to calibrate the temperature visually just by a self-powered brightness detection circuit with LED indicators.Taking advantage of LSC without hot spot effects plaguing the solar cells,as-prepared temperature alarm system can operate well on both sunny and cloudy day.Pengfei Xia Fan Liu Yuru Duan Xuefang Hu Changgui Lu Shuhong Xu Chunlei Wang 2023Journal of Energy Chemistry2023,,3:0
18Discovery and inspiration of large-and medium-sized glutenite-rich oil and gas fields in the eastern South China Sea:An example from Paleogene Enping Formation in Huizhou 26 subsag,Pearl River Mouth Basin显示文摘Based on the practice of oil and gas exploration in the Huizhou Sag of the Pearl River Mouth Basin,the geochemical indexes of source rocks were measured,the reservoir development morphology was restored,the rocks and minerals were characterized microscopically,the measured trap sealing indexes were compared,the biomarker compounds of crude oil were extracted,the genesis of condensate gas was identified,and the reservoir-forming conditions were examined.On this basis,the Paleogene Enping Formation in the Huizhou 26 subsag was systematically analyzed for the potential of oil and gas resources,the development characteristics of large-scale high-quality conglomerate reservoirs,the trapping effectiveness of faults,the hydrocarbon migration and accumulation model,and the formation conditions and exploration targets of large-and medium-sized glutenite-rich oil and gas fields.The research results were obtained in four aspects.First,the Paleogene Wenchang Formation in the Huizhou 26 subsag develops extensive and thick high-quality source rocks of semi-deep to deep lacustrine subfacies,which have typical hydrocarbon expulsion characteristics of'great oil generation in the early stage and huge gas expulsion in the late stage',providing a sufficient material basis for hydrocarbon accumulation in the Enping Formation.Second,under the joint control of the steep slope zone and transition zone of the fault within the sag,the large-scale near-source glutenite reservoirs are highly heterogeneous,with the development scale dominated hierarchically by three factors(favorable facies zone,particle component,and microfracture).The(subaqueous)distributary channels near the fault system,with equal grains,a low mud content(<5%),and a high content of feldspar composition,are conducive to the development of sweet spot reservoirs.Third,the strike-slip pressurization trap covered by stable lake flooding mudstone is a necessary condition for oil and gas preservation,and the NE and nearly EW faults obliquely to the principal stress have the best control on traps.Fourth,the spatiotemporal configuration of high-quality source rocks,fault transport/sealing,and glutenite reservoirs controls the degree of hydrocarbon enrichment.From top to bottom,three hydrocarbon accumulation units,i.e.low-fill zone,transition zone,and high-fill zone,are recognized.The main area of the channel in the nearly pressurized source-connecting fault zone is favorable for large-scale hydrocarbon enrichment.The research results suggest a new direction for the exploration of large-scale glutenite-rich reservoirs in the Enping Formation of the Pearl River Mouth Basin,and present a major breakthrough in oil and gas exploration.XU Changgui GAO Yangdong LIU Jun PENG Guangrong LIU Pei XIONG Wanlin SONG Penglin 2024Petroleum Exploration and Development2024,51,1:0
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