The well deployment in the Ordovician Yingshan Formation in the Gucheng area of the Tarim Basin mainly focuses on the inner gentle slope in the western part of the study area,which results in a low drilling success ra...The well deployment in the Ordovician Yingshan Formation in the Gucheng area of the Tarim Basin mainly focuses on the inner gentle slope in the western part of the study area,which results in a low drilling success rate.To address this issue,this study focused on reconstructing sedimentary models and the adjustment strategies for oil and gas exploration.The carbonate sedimentary model of the Yingshan Formation was re-evaluated using the data of seismic interpretation,core observations,thin-section analyses,carbon isotopic composition,well logging,detrital zircon U-Pb dating,and carbonate mineral U-Pb dating.Then,the favorable sedimentary facies belts were delineated,and updated prospective exploration targets were proposed.The results demonstrate that the sedimentary model of the Yingshan Formation in the Gucheng area is characterized as a rimmed platform system,exhibiting an orderly west-to-east sedimentary sequence transition from restricted/open platform environments through the platform margin and slope settings,ultimately grading into basinal deposits.The platform margin,distinguished by thick successions of grain shoals overlain by interlayered karst zones,is the most favorable distribution area for large-scale reservoirs.Guided by this revised sedimentary model,Well Gutan-1 was successfully drilled within the outer platform margin,encountering over 90%high-energy grain shoal facies with well-developed porous and fractured-vuggy reservoirs,and achieving industrial oil and gas flow.It is confirmed that the platform margin is the priority area for oil and gas exploration in the Ordovician System of the Gucheng area,thereby effectively ending the prolonged exploration stagnation in the Yingshan Formation of the Gucheng area.展开更多
In this paper,we propose a rate splitting multiple access(RSMA)based integrated sensing and communication system(ISAC),where the sensing and communication are realized simultaneously with the RSMA signal.Further,recon...In this paper,we propose a rate splitting multiple access(RSMA)based integrated sensing and communication system(ISAC),where the sensing and communication are realized simultaneously with the RSMA signal.Further,reconfigurable holographic surface(RHS)is utilized to replace the traditional antennas for beam generation,expecting to combine the advantages of RSMA and RHS.To maximize the weighted summation of system rate and probing power,an optimization problem is formulated to jointly design the digital beamformer,the holographic beamformer and the message splitting vectors.To solve the non-convex problem,we first decompose it into two subproblems,where one jointly designs the digital beamformer and message splitting vectors,and the other deals with the holographic beamformer.An iterative algorithm,which leverages successive convex approximation and semi-definite relaxation,is proposed to achieve the sub-optimal solution through solving these two subproblems alternatively.Simulations confirm the effectiveness and efficiency of the proposed algorithm.展开更多
To predict fracture height in hydraulic fracturing, we developed and solved a hydraulic fracture height mathematical model aiming at high stress and multi-layered complex formations based on studying the effect of pla...To predict fracture height in hydraulic fracturing, we developed and solved a hydraulic fracture height mathematical model aiming at high stress and multi-layered complex formations based on studying the effect of plastic region generated by stress concentration at fracture tip on the growth of fracture height. Moreover, we compared the results from this model with results from two other fracture height prediction models(MFEH, Frac Pro) to verify the accuracy of the model. Sensitivity analysis by case computation of the model shows that the hydraulic fracture growth in ladder pattern, and the larger the fracture height, the more obvious the ladder growth pattern is. Fracture height growth is mainly influenced by the in-situ stresses. Fracture toughness of rock can prohibit the growth of fracture height to some extent. Moreover, the increase of fracturing fluid density can facilitate the propagation of the lower fracture tip.展开更多
The hierarchical nanostructured N-doped TiO2 immobilized activated carbon fiber(N-TiO2/ACF)porous composites are fabricated to removal dynamic toluene gas.The results show that nitrogen ions doping and ACF modificatio...The hierarchical nanostructured N-doped TiO2 immobilized activated carbon fiber(N-TiO2/ACF)porous composites are fabricated to removal dynamic toluene gas.The results show that nitrogen ions doping and ACF modification can decrease the band gap of TiO2,leading to red shift toward visible light region.Interestingly,N-TiO2/ACF exhibits strongly synergistic effect owing to high surface area,good crystallinity,enhanced bandgap structure and light harvesting.The toluene removal rate of N-TiO2/ACF composites is 2.29 times higher than that of TiO2.The N-TiO2/ACF for toluene degradation followed the Langmuir-Hinshelwood kinetic model,and the rate constant is enhanced 8 times compared with TiO2.The possible photodegradation pathway and mechanisms are proposed.展开更多
Among cancers, lung cancer is the most common cause of death in China. For the prevention and control of lung cancer, it is necessary to investigate the spatial and temporal distribution of lung cancer mortality, as w...Among cancers, lung cancer is the most common cause of death in China. For the prevention and control of lung cancer, it is necessary to investigate the spatial and temporal distribution of lung cancer mortality, as well as the changes in the trend and the affecting mechanism. Based on statistics and auto-correlation analysis, this paper studied the spatial and temporal distribution of lung cancer mortality in Yuhui District, Bengbu, Huaihe River Basin, from 2017 to 2020. In addition, Spearman’s Rank Correlation Assessment Model and Geographic Detector Model were used to examine the relationship between environmental factors and lung cancer mortality to identify impact factors and their mechanisms. The findings indicated that: 1) from the characteristics of temporal distribution, the number of lung cancer deaths exhibited a linear growth tendency, with the highest mortality in winter;2) from the characteristics of spatial distribution, lung cancer mortality showed a strong spatial agglomeration form, concentrating on two clustering areas, located in the old city and the central city of Bengbu, near the Huaihe River;3) from the point of view of the whole research area, there were 15 impact factors with significant correlation in the built and natural environment factors. The significant impacting factors in the built environment included land use, road traffic, spatial form and blue-green space, which could indirectly affect lung cancer mortality, while air pollution and temperature constituted the significant impacting factors in the natural environment;4) the influence of screened environmental factors on lung cancer mortality was different. Spatial stratified heterogeneity assessment, the interaction among environmental factors demonstrated statistical significance, it was found that the interaction between environmental factors in pairs had a significant enhancement effect on lung cancer mortality. To some extent, urban planning and policies could reduce lung cancer mortality.展开更多
Objective: to explore the effect of Omaha system nursing for elderly patients with knee osteoarthritis. Methods: 118 elderly patients with knee osteoarthritis were selected into this study, all from January 2019 to Ja...Objective: to explore the effect of Omaha system nursing for elderly patients with knee osteoarthritis. Methods: 118 elderly patients with knee osteoarthritis were selected into this study, all from January 2019 to January 2020 in our hospital. They were divided into two groups on the basis of odd-even series method. The experimental group was given Omaha systematic nursing while the control group was given basic nursing. The difference in final effect was analyzed. Results: the knee joint function score of the experimental group was higher than that of the control group after 3 months and 6 months, and the pain score was lower than that of the control group, with significant difference (P < 0.05). Conclusion: after the implementation of Omaha systematic nursing, elderly patients with knee osteoarthritis can relieve pain and improve knee joint function, which is a method worthy of further reference.展开更多
基于异养硝化-好氧反硝化菌的生物脱氮技术可有效去除污水中的氮素,但随着废水盐度增加,生物脱氮效率急剧下降。为解决高盐废水生物脱氮难题,从我国新疆盐湖筛选出一株耐盐的异养硝化-好氧反硝化菌5505菌株,通过菌落特征观察、生理生化...基于异养硝化-好氧反硝化菌的生物脱氮技术可有效去除污水中的氮素,但随着废水盐度增加,生物脱氮效率急剧下降。为解决高盐废水生物脱氮难题,从我国新疆盐湖筛选出一株耐盐的异养硝化-好氧反硝化菌5505菌株,通过菌落特征观察、生理生化特征和细菌16S r RNA基因序列分析,并以NH_(4)^(+)-N、NO_(3)^(-)-N和NO_(2)^(-)-N为单一或混合氮源开展单因素实验,研究菌株的硝化、反硝化性能及氮代谢途径。结果表明,菌株5505为盐单胞菌(Halomonas sp.),在Na Cl浓度为1%–25%(质量体积分数)范围内可正常生长,在3%–8%范围内可高效发挥除氮功能,在最适浓度8%条件下,对NH_(4)^(+)-N、NO_(3)^(-)-N和NO_(2)^(-)-N去除率分别为100.0%、94.11%和74.43%。氮平衡分析发现,菌株5505的氮去除主要通过同化作用,最高可占去除量的62.68%,在多氮源共存时,优先利用氨氮,推测其脱氮路径为NH_(4)^(+)→NH_(2)OH→NO_(2)^(-)→NO_(3)^(-)→NO_(2)^(-)→NO/N_(2)O/N_(2)。本研究为高盐含氮废水的生物净化提供了高效的耐盐菌种资源,对丰富生物脱氮理论及提高污水处理厂脱氮性能具有重要意义。展开更多
基金Supported by the National Natural Science Foundation of China General Program(42272181)CNPC-Southwest Petroleum University Innovation Consortium Program(2020CX010301).
文摘The well deployment in the Ordovician Yingshan Formation in the Gucheng area of the Tarim Basin mainly focuses on the inner gentle slope in the western part of the study area,which results in a low drilling success rate.To address this issue,this study focused on reconstructing sedimentary models and the adjustment strategies for oil and gas exploration.The carbonate sedimentary model of the Yingshan Formation was re-evaluated using the data of seismic interpretation,core observations,thin-section analyses,carbon isotopic composition,well logging,detrital zircon U-Pb dating,and carbonate mineral U-Pb dating.Then,the favorable sedimentary facies belts were delineated,and updated prospective exploration targets were proposed.The results demonstrate that the sedimentary model of the Yingshan Formation in the Gucheng area is characterized as a rimmed platform system,exhibiting an orderly west-to-east sedimentary sequence transition from restricted/open platform environments through the platform margin and slope settings,ultimately grading into basinal deposits.The platform margin,distinguished by thick successions of grain shoals overlain by interlayered karst zones,is the most favorable distribution area for large-scale reservoirs.Guided by this revised sedimentary model,Well Gutan-1 was successfully drilled within the outer platform margin,encountering over 90%high-energy grain shoal facies with well-developed porous and fractured-vuggy reservoirs,and achieving industrial oil and gas flow.It is confirmed that the platform margin is the priority area for oil and gas exploration in the Ordovician System of the Gucheng area,thereby effectively ending the prolonged exploration stagnation in the Yingshan Formation of the Gucheng area.
基金supported by the Joint Funds of the National Natural Science Foundation of China(No.U23A20277)the Joint Funds of the National Natural Science Foundation of China(No.U22A2003).
文摘In this paper,we propose a rate splitting multiple access(RSMA)based integrated sensing and communication system(ISAC),where the sensing and communication are realized simultaneously with the RSMA signal.Further,reconfigurable holographic surface(RHS)is utilized to replace the traditional antennas for beam generation,expecting to combine the advantages of RSMA and RHS.To maximize the weighted summation of system rate and probing power,an optimization problem is formulated to jointly design the digital beamformer,the holographic beamformer and the message splitting vectors.To solve the non-convex problem,we first decompose it into two subproblems,where one jointly designs the digital beamformer and message splitting vectors,and the other deals with the holographic beamformer.An iterative algorithm,which leverages successive convex approximation and semi-definite relaxation,is proposed to achieve the sub-optimal solution through solving these two subproblems alternatively.Simulations confirm the effectiveness and efficiency of the proposed algorithm.
基金Supported by the Natural Science Foundation of Heilongjiang Province of China(YQ2019E007).
文摘To predict fracture height in hydraulic fracturing, we developed and solved a hydraulic fracture height mathematical model aiming at high stress and multi-layered complex formations based on studying the effect of plastic region generated by stress concentration at fracture tip on the growth of fracture height. Moreover, we compared the results from this model with results from two other fracture height prediction models(MFEH, Frac Pro) to verify the accuracy of the model. Sensitivity analysis by case computation of the model shows that the hydraulic fracture growth in ladder pattern, and the larger the fracture height, the more obvious the ladder growth pattern is. Fracture height growth is mainly influenced by the in-situ stresses. Fracture toughness of rock can prohibit the growth of fracture height to some extent. Moreover, the increase of fracturing fluid density can facilitate the propagation of the lower fracture tip.
基金This study was supported by the CNPC Research Institute of Safety and Environmental Protection Technology(No.PPCIP2017005).
文摘The hierarchical nanostructured N-doped TiO2 immobilized activated carbon fiber(N-TiO2/ACF)porous composites are fabricated to removal dynamic toluene gas.The results show that nitrogen ions doping and ACF modification can decrease the band gap of TiO2,leading to red shift toward visible light region.Interestingly,N-TiO2/ACF exhibits strongly synergistic effect owing to high surface area,good crystallinity,enhanced bandgap structure and light harvesting.The toluene removal rate of N-TiO2/ACF composites is 2.29 times higher than that of TiO2.The N-TiO2/ACF for toluene degradation followed the Langmuir-Hinshelwood kinetic model,and the rate constant is enhanced 8 times compared with TiO2.The possible photodegradation pathway and mechanisms are proposed.
基金Under the auspices of Natural Science Foundation of Anhui Province (No. 2008085ME160)Provincial Natural Science Research Projects in Anhui Province-Postgraduate Projects (No. YJS20210500)。
文摘Among cancers, lung cancer is the most common cause of death in China. For the prevention and control of lung cancer, it is necessary to investigate the spatial and temporal distribution of lung cancer mortality, as well as the changes in the trend and the affecting mechanism. Based on statistics and auto-correlation analysis, this paper studied the spatial and temporal distribution of lung cancer mortality in Yuhui District, Bengbu, Huaihe River Basin, from 2017 to 2020. In addition, Spearman’s Rank Correlation Assessment Model and Geographic Detector Model were used to examine the relationship between environmental factors and lung cancer mortality to identify impact factors and their mechanisms. The findings indicated that: 1) from the characteristics of temporal distribution, the number of lung cancer deaths exhibited a linear growth tendency, with the highest mortality in winter;2) from the characteristics of spatial distribution, lung cancer mortality showed a strong spatial agglomeration form, concentrating on two clustering areas, located in the old city and the central city of Bengbu, near the Huaihe River;3) from the point of view of the whole research area, there were 15 impact factors with significant correlation in the built and natural environment factors. The significant impacting factors in the built environment included land use, road traffic, spatial form and blue-green space, which could indirectly affect lung cancer mortality, while air pollution and temperature constituted the significant impacting factors in the natural environment;4) the influence of screened environmental factors on lung cancer mortality was different. Spatial stratified heterogeneity assessment, the interaction among environmental factors demonstrated statistical significance, it was found that the interaction between environmental factors in pairs had a significant enhancement effect on lung cancer mortality. To some extent, urban planning and policies could reduce lung cancer mortality.
文摘Objective: to explore the effect of Omaha system nursing for elderly patients with knee osteoarthritis. Methods: 118 elderly patients with knee osteoarthritis were selected into this study, all from January 2019 to January 2020 in our hospital. They were divided into two groups on the basis of odd-even series method. The experimental group was given Omaha systematic nursing while the control group was given basic nursing. The difference in final effect was analyzed. Results: the knee joint function score of the experimental group was higher than that of the control group after 3 months and 6 months, and the pain score was lower than that of the control group, with significant difference (P < 0.05). Conclusion: after the implementation of Omaha systematic nursing, elderly patients with knee osteoarthritis can relieve pain and improve knee joint function, which is a method worthy of further reference.
文摘基于异养硝化-好氧反硝化菌的生物脱氮技术可有效去除污水中的氮素,但随着废水盐度增加,生物脱氮效率急剧下降。为解决高盐废水生物脱氮难题,从我国新疆盐湖筛选出一株耐盐的异养硝化-好氧反硝化菌5505菌株,通过菌落特征观察、生理生化特征和细菌16S r RNA基因序列分析,并以NH_(4)^(+)-N、NO_(3)^(-)-N和NO_(2)^(-)-N为单一或混合氮源开展单因素实验,研究菌株的硝化、反硝化性能及氮代谢途径。结果表明,菌株5505为盐单胞菌(Halomonas sp.),在Na Cl浓度为1%–25%(质量体积分数)范围内可正常生长,在3%–8%范围内可高效发挥除氮功能,在最适浓度8%条件下,对NH_(4)^(+)-N、NO_(3)^(-)-N和NO_(2)^(-)-N去除率分别为100.0%、94.11%和74.43%。氮平衡分析发现,菌株5505的氮去除主要通过同化作用,最高可占去除量的62.68%,在多氮源共存时,优先利用氨氮,推测其脱氮路径为NH_(4)^(+)→NH_(2)OH→NO_(2)^(-)→NO_(3)^(-)→NO_(2)^(-)→NO/N_(2)O/N_(2)。本研究为高盐含氮废水的生物净化提供了高效的耐盐菌种资源,对丰富生物脱氮理论及提高污水处理厂脱氮性能具有重要意义。
