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PBL-RISE教学模式在妇产科护理课程思政中的应用研究
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作者 闵敏 刘莉 张红玲 《中国继续医学教育》 2024年第10期71-75,共5页
目的 探讨基于问题的教学法(problem-based learning,PBL)联合以文献为导向的自我学习(reference induced self-education,RISE)(简称PBL-RISE教学模式)在妇产科护理课程思政教育中的应用效果。方法 采用便利抽样法选取2021年10月—2022... 目的 探讨基于问题的教学法(problem-based learning,PBL)联合以文献为导向的自我学习(reference induced self-education,RISE)(简称PBL-RISE教学模式)在妇产科护理课程思政教育中的应用效果。方法 采用便利抽样法选取2021年10月—2022年1月于华中科技大学同济医学院附属同济医院妇产科实习的78名护生作为教学对象,将2021年10—11月的39名护生设为对照组,将2021年12月—2022年1月的39名护生设为试验组。对照组采用传统教学模式,试验组采用PBLRISE教学模式。实习结束后,通过理论、操作考核及填写护士人文执业能力量表对2组的教学效果进行评价。结果 试验组理论考试成绩为(85.53±5.05)分,高于对照组的(79.11±6.93)分,差异有统计学意义(P <0.05);试验组操作技能成绩为(91.71±2.44)分,与对照组的(91.31±2.39)分比较,差异无统计学意义(P> 0.05)。试验组人文执业能力总分[(95.71±5.54)分]及人文关怀实践[(37.28±4.05)分]、人际沟通[(22.18±2.85)分]、自我管理[(10.64±1.65)分]、伦理与法律实践[(11.54±1.07)分]、心理调试[(14.08±1.75)分]得分均高于对照组[(84.58±5.11)分、(33.21±3.73)分、(19.82±2.25)分、(9.87±1.59)分、(10.05±1.19)分、(11.64±1.27)分],差异有统计学意义(P <0.05)。试验组总满意度(97.4%)与对照组(89.7%)比较,差异无统计学意义(P> 0.05)。结论 PBL-RISE教学模式应用于妇产科护理教学中有助于培养护生的人文执业能力,提升教学效果。 展开更多
关键词 PBL RISE 教学模式 妇产科护理 课程思政 人文执业能力 教学效果
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Regional Climate Damage Quantification and Its Impacts on Future Emission Pathways Using the RICE Model
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作者 Shili YANG Wenjie DONG +2 位作者 Jieming CHOU Yong ZHANG Weixing ZHAO 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2024年第9期1843-1852,共10页
This study quantified the regional damages resulting from temperature and sea level changes using the Regional Integrated of Climate and Economy(RICE)model,as well as the effects of enabling and disabling the climate ... This study quantified the regional damages resulting from temperature and sea level changes using the Regional Integrated of Climate and Economy(RICE)model,as well as the effects of enabling and disabling the climate impact module on future emission pathways.Results highlight varied damages depending on regional economic development and locations.Specifically,China and Africa could suffer the most serious comprehensive damages caused by temperature change and sea level rise,followed by India,other developing Asian countries(OthAsia),and other high-income countries(OHI).The comprehensive damage fractions for China and Africa are projected to be 15.1%and 12.5%of gross domestic product(GDP)in 2195,with corresponding cumulative damages of 124.0 trillion and 87.3 trillion United States dollars(USD)from 2005 to 2195,respectively.Meanwhile,the comprehensive damage fractions in Japan,Eurasia,and Russia are smaller and projected to be lower than 5.6%of GDP in 2195,with cumulative damages of 6.8 trillion,4.2 trillion,and 3.3 trillion USD,respectively.Additionally,coastal regions like Africa,the European Union(EU),and OHI show comparable damages for sea level rise and temperature change.In China,however,sea level-induced damages are projected to exceed those from temperature changes.Moreover,this study indicates that switching the damage modules on or off affects the regional and global emission trajectories,but the magnitude is relatively small.By 2195,global emissions under the experiments with all of the damage modules switched off,only the sea level damage module switched on,and only the temperature damage module switched on,were 3.5%,2.3%and 1.2%higher than those with all of the damage modules switched on,respectively. 展开更多
关键词 climate damage integrated assessment model carbon emissions sea level rise temperature change
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Recent progress on impact induced reaction mechanism of reactive alloys
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作者 Yansong Yang Chuanting Wang +5 位作者 Yuanpei Meng Yue Ma Lei Guo Yuan He Zhichao Sun Yong He 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第7期69-95,共27页
In recent years,in order to improve the destructive effectiveness of munitions,the use of new types of destructive elements is an important way to improve destructive effectiveness.As a new type of reactive material,r... In recent years,in order to improve the destructive effectiveness of munitions,the use of new types of destructive elements is an important way to improve destructive effectiveness.As a new type of reactive material,reactive alloy contains a large portion of reactive metal elements(Al,Mg,Ti,Zr,etc.),which breaks up under high-velocity impact conditions,generating a large number of high-temperature combustible fragments,which undergo a violent combustion reaction with air.Compared with traditional metal polymers(Al-PTFE)and other reactive composites,it has higher density and strength,excellent mechanical properties and broader application prospects.Currently,researchers have mainly investigated the impact energy release mechanism of reactive alloys through impact tests,and found that there are several important stages in the process of the material from fragmentation to reaction,i.e.,impact fragmentation of the material,rapid heating and combustion reaction.This paper focuses on three problems that need to be solved in the impact-induced energy release process of reactive alloys,namely:the fragmentation mechanism and size distribution law of the fragments produced by the impact of the material on the target,the relationship between the transient temperatures and the size of the fragments,and the reaction temperatures and size thresholds of the fragments to undergo the chemical reaction.The current status of the research of the above problems is reviewed,some potential directions to reveal the impact induced reaction mechanism of reactive alloy is discussed. 展开更多
关键词 Reactive alloys IMPACT FRAGMENTATION Mass and size distribution Shock temperature rise Adiabatic shear COMBUSTION
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Comprehensive Risk Assessment of Sea Level Rise and Tropical Cyclones in Dongzhaigang Mangroves,China
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作者 DING Ruyi CAI Rongshuo +3 位作者 YAN Xiuhua LI Cuihua WANG Cui NIE Xinyu 《Chinese Geographical Science》 SCIE CSCD 2024年第4期631-646,共16页
Mangroves play a pivotal role in tropical and subtropical coastal ecosystem,yet they are highly vulnerable to the effects of climate change,particularly the accelerated global sea level rise(SLR)and stronger tropical ... Mangroves play a pivotal role in tropical and subtropical coastal ecosystem,yet they are highly vulnerable to the effects of climate change,particularly the accelerated global sea level rise(SLR)and stronger tropical cyclones(TCs).However,there is a lack of research addressing future simultaneous combined impacts of the slow-onset of SLR and rapid-onset of TCs on China's mangroves.In order to develop a comprehensive risk assessment method considering the superimposed effects of these two factors and analyze risk for mangroves in Dongzhaigang,Hainan Island,China,we used observational and climate model data to assess the risks to mangroves under low,intermediate,and very high greenhouse gas(GHG)emission scenarios(such as SSP1-2.6,SSP2-4.5,and SSP5-8.5)in 2030,2050,and 2100,and compiled a risk assessment scheme for mangroves in Dongzhaigang,China.The results showed that the combined risks from SLR and TCs will continue to rise;however,SLRs will increase in intensity,and TCs will decrease.The comprehensive risk of the Dongzhaigang mangroves posed by climate change will remain low under SSP1-2.6 and SSP2-4.5 scenarios by 2030,but it will increase substantially by 2100.While under SSP5-8.5 scenario,the risks to mangroves in Dongzhaigang are projected to increase considerably by 2050,and approximately 68.8%of mangroves will be at very high risk by 2100.The risk to the Dongzhaigang mangroves is not only influenced by the hazards but also closely linked to their exposure and vulnerability.We therefore propose climate resilience developmental responses for mangroves to address the effects of climate change.This study for the combined impact of TCs and SLR on mangroves in Dongzhaigang,China can enrich the method system of mangrove risk assessment and provide references for scientific management. 展开更多
关键词 MANGROVE climate change risk assessment combined hazards sea level rise(SLR) tropical cyclones(TCs) resilience development Dongzhaigang China
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Intraocular pressure and gonioscopic findings in primary angle-closure disease in India—a big data study
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作者 Srikantaiah Ramyashri Anthony Vipin Das Sirisha Senthil 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2024年第8期1495-1500,共6页
AIM:To describe the gonioscopic profile and intraocular pressure(IOP)in primary angle-closure(PAC)disease in patients presenting to a tertiary eye care network in India.METHODS:A cross-sectional hospital-based study t... AIM:To describe the gonioscopic profile and intraocular pressure(IOP)in primary angle-closure(PAC)disease in patients presenting to a tertiary eye care network in India.METHODS:A cross-sectional hospital-based study that included 31484 new patients presenting between 2011 and 2021.Patients with a clinical diagnosis of PAC/suspect/glaucoma were included.The data was collected from an electronic medical record system.RESULTS:PAC glaucoma(PACG)(47.55%)was the most common diagnosis followed by PAC(39.49%)and PAC suspect(PACS;12.96%).Female preponderance(54.6%)was noted with higher mean age at presentation among males(P<0.0001).PACS and PAC showed the highest prevalence in 6th decade but PACG was higher at 7th decade.The probability of angle opening was 95.93%,90.32%and 63.36%in PACS,PAC and PACG eyes respectively post peripheral iridotomy(PI).Plateau iris syndrome(PIS)was noted in 252 eyes and all showed post dilated rise of IOP.A post dilated IOP rise was also noted with 8.86%,33.95%and 57.19%eyes with PACS,PAC and PACG respectively with IOP rise between 6-8 mm Hg across the disease spectrum.CONCLUSION:The superior quadrant is the narrowest angle and difficult to open with indentation and post PI.The probability of angle opening is less in PIS especially the complete variety along with post dilated IOP rise.The post dilated IOP rise in angle closure eyes warrants a careful dilatation,especially with PIS. 展开更多
关键词 angle closure disease peripheral iridectomy GONIOSCOPY post dilated intraocular pressure rise plateau iris syndrome
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Contributors to tidal duration asymmetry with varied coastline configurations on western shelf of Yellow Sea
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作者 Xi Feng Zheng Li +3 位作者 Hui Feng Jia-yan Yang Shou-peng Xie Wei-bing Feng 《Water Science and Engineering》 EI CAS CSCD 2024年第1期1-12,共12页
Coastal management in China is confronted with an urgent choice between natural restoration and maintenance of existing seawalls and reclaimed land for economic development.A key criterion for making this decision is ... Coastal management in China is confronted with an urgent choice between natural restoration and maintenance of existing seawalls and reclaimed land for economic development.A key criterion for making this decision is the resilience to coastal flooding,which depends on the ability to predict tidal level.Tidal duration asymmetry(TDA)is a key parameter in determination of the arrival and duration of flood tides.This study selected the western inner shelf of the Yellow Sea(WYS)as the study area and investigated the responses of TDA to different shoreline configurations and relative sea level rise.The responses of TDA to shoreline reconstruction yielded spatial variability locally and remotely.In the nearshore area,the responses of TDA to the complex ocean environment mainly originated from the combined functions of reflection,bottom friction,and advection,which controlled the energy transfer from M2 or S2 constituents to their overtides or compound tides.The sensitivity of TDA to coastline typologies was not limited to coastal waters but could stretch over the entire inner shelf.The vulnerability of tidal responses was due to the displacement of the M2 amphidrome of the Kelvin wave on the WYS,which in turn changed tidal energy fluxes over the regime.The relative sea level rise could intensify the feedback of TDA to seawalls and land reclamation. 展开更多
关键词 Tidal duration asymmetry Western inner shelf of Yellow Sea Natural restoration Relative sea level rise Tidal amphidrome
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国家能源集团RISE品牌战略的建构研究
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作者 李永生 《中国煤炭》 北大核心 2024年第1期21-28,共8页
在创建世界一流示范企业的进程中,国家能源集团的品牌价值得以迅速提升、品牌影响力迅速扩增,重要原因之一是推出实施了RISE品牌战略并取得显著成效。基于国家能源集团品牌战略的顶层设计和底层逻辑,对RISE品牌战略的丰富内涵和建构实... 在创建世界一流示范企业的进程中,国家能源集团的品牌价值得以迅速提升、品牌影响力迅速扩增,重要原因之一是推出实施了RISE品牌战略并取得显著成效。基于国家能源集团品牌战略的顶层设计和底层逻辑,对RISE品牌战略的丰富内涵和建构实践进行了阐述,总结了集团品牌战略研制路线图、品牌战略研究逻辑和品牌战略核心内容构建,以期对煤炭企业品牌战略研制和成就卓著品牌提供参考借鉴。 展开更多
关键词 国家能源集团 RISE品牌战略 品牌建构 品牌价值 世界一流企业
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2023年各国谋安全促发展纵横
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作者 Lu Zhongwei 《Contemporary International Relations》 2024年第2期4-17,共14页
2023 will be remembered as a critical juncture in the third decade of the 21st century.Significant changes have been witnessed in the international landscape,underpinned by the law of history that great powers rise an... 2023 will be remembered as a critical juncture in the third decade of the 21st century.Significant changes have been witnessed in the international landscape,underpinned by the law of history that great powers rise and inevitably fall.It could be deemed a year of coup d'état for Africa,a year of conflict for Eastern Europe,a year of crisis for the Middle East,and a year of diplomacy for major powers.Countries around the globe are concerned about how the world and times will evolve as they pursue their security and development.As a responsible major country,China has proposed its solutions for enhancing security,development,and civilizations worldwide.It applies an approach that removes barriers and increases connectivity,turns shocks into driving forces,accumulates experience from setbacks,and arouses confidence in today's unsettled world.While promoting world peace and development,China also needs to pay close heed to the changes that are taking place.Only by identifying the crux of its problems and stopping the spread of risks can China ensure a dynamic equilibrium between security and development. 展开更多
关键词 international landscape rise and fall of great powers security and development 2023
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Analysis for Effects of Temperature Rise of PV Modules upon Driving Distance of Vehicle Integrated Photovoltaic Electric Vehicles
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作者 Masafumi Yamaguchi Yasuyuki Ota +18 位作者 Taizo Masuda Christian Thiel Anastasios Tsakalidis Arnulf Jaeger-Waldau Kenji Araki Kensuke Nishioka Tatsuya Takamoto Takashi Nakado Kazumi Yamada Tsutomu Tanimoto Yosuke Tomita Yusuke Zushi Kenichi Okumura Takashi Mabuchi Akinori Satou Kyotaro Nakamura Ryo Ozaki Nobuaki Kojima Yoshio Ohshita 《Energy and Power Engineering》 2024年第4期131-150,共20页
The development of vehicle integrated photovoltaics-powered electric vehicles (VIPV-EV) significantly reduces CO<sub>2</sub> emissions from the transport sector to realize a decarbonized society. Although ... The development of vehicle integrated photovoltaics-powered electric vehicles (VIPV-EV) significantly reduces CO<sub>2</sub> emissions from the transport sector to realize a decarbonized society. Although long-distance driving of VIPV-EV without electricity charging is expected in sunny regions, driving distance of VIPV-EV is affected by climate conditions such as solar irradiation and temperature rise of PV modules. In this paper, detailed analytical results for effects of climate conditions such as solar irradiation and temperature rise of PV modules upon driving distance of the VIPV-EV were presented by using test data for Toyota Prius and Nissan Van demonstration cars installed with high-efficiency InGaP/GaAs/InGaAs 3-junction solar cell modules with a module efficiency of more than 30%. The temperature rise of some PV modules studied in this study was shown to be expressed by some coefficients related to solar irradiation, wind speed and radiative cooling. The potential of VIPV-EV to be deployed in 10 major cities was also analyzed. Although sunshine cities such as Phoenix show the high reduction ratio of driving range with 17% due to temperature rise of VIPV modules, populous cities such as Tokyo show low reduction ratio of 9%. It was also shown in this paper that the difference between the driving distance of VIPV-EV driving in the morning and the afternoon is due to PV modules’ radiative cooling. In addition, the importance of heat dissipation of PV modules and the development of high-efficiency PV modules with better temperature coefficients was suggested in order to expand driving range of VIPV-EV. The effects of air-conditioner usage and partial shading in addition to the effects of temperature rise of VIPV modules were suggested as the other power losses of VIPV-EV. 展开更多
关键词 Vehicle Integrated Photovoltaics (VIPV) VIPV-Powered Electric Vehicles Driving Distance PV Modules Solar Irradiation Temperature Rise Radiative Cooling
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The Impact of Sea Level Rise on Roadway Design and Evacuation Routes in Delaware
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作者 Jack Palevich Ardeshir Faghri Ahmet Karakurt 《American Journal of Climate Change》 2024年第1期69-82,共14页
As the global temperature continues to increase, the sea level continues to rise at a rapid rate that has never been seen before. This becomes an issue for many facets of life but one of the most impacted is the trans... As the global temperature continues to increase, the sea level continues to rise at a rapid rate that has never been seen before. This becomes an issue for many facets of life but one of the most impacted is the transportation infrastructure. Many people living in low elevation coastal areas can become trapped by flooding with no way in or out. With Delaware being a coastal state, this would affect a large portion of the population and will have detrimental effects over time if nothing is done to combat sea level rise. The issue with sea level rise in transportation is that once the roads become flooded, they become virtually unusable and detour routes would be needed. If all the roads in a coastal area were to be affected by sea level rise, the options for detours would become limited. This article looks at direct solutions to combat sea level rise and indirect solutions that would specifically help transportation infrastructure and evacuation routes in Delaware. There is not one solution that can fix every problem, so many solutions are laid out to see what is applicable to each affected area. Some solutions include defense structures that would be put close to the coast, raising the elevation of vulnerable roads throughout the state and including pumping stations to drain the water on the surface of the road. With an understanding of all these solutions around the world, the ultimate conclusion came in the form of a six-step plan that Delaware should take in order to best design against sea level rise in these coastal areas. 展开更多
关键词 Sea Level Rise Roadway Design Evacuation Routes
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境外合规管理三个“深刻理解”
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作者 刘学海 高琦 《企业管理》 2024年第2期19-21,共3页
本文系统回答了境外合规的三个基本设问。一是“为什么要合规”,从政治高度统一思想,明确境外合规不仅是防范企业风险的经济责任,更是保障国有资产安全的政治责任。二是“合什么规”,从方法角度提供参考,澄清惯性思维和认知偏差,提高分... 本文系统回答了境外合规的三个基本设问。一是“为什么要合规”,从政治高度统一思想,明确境外合规不仅是防范企业风险的经济责任,更是保障国有资产安全的政治责任。二是“合什么规”,从方法角度提供参考,澄清惯性思维和认知偏差,提高分析和解决问题的能力,看清国企合规与民企、外企合规,境外合规与境内、涉外合规等管理模式的异同。三是“如何合规”,从路径角度给出建议样本,方便不同规模. 展开更多
关键词 境外合规管理 国有企业 RISE365境外合规管理模型 以人为本
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Analysis of deformation and internal flow patterns for rising single bubbles in different liquids 被引量:4
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作者 Xin Li Pan Zhang +2 位作者 Jianlong Li Weiwen Wang Guanghui Chen 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2019年第4期745-758,共14页
Gas–liquid multiphase flow is a significant phenomenon in chemical processes. The rising behaviors of single bubbles in the quiescent liquids have been investigated but the internal flow patterns and deformation rule... Gas–liquid multiphase flow is a significant phenomenon in chemical processes. The rising behaviors of single bubbles in the quiescent liquids have been investigated but the internal flow patterns and deformation rules of bubbles, which influence the mass transfer efficiency to a large extent, have received much less attention. In this paper, the volume of fluid method was used to calculate the bubble shapes, pressure, velocity distributions,and the flow patterns inside the bubbles. The rising behavior of the bubbles with four different initial diameters,i.e., 3 mm, 5 mm, 7 mm and 9 mm was investigated in four various liquids including water, 61.23% glycerol,86.73% glycerol and 100% glycerol. The results show that the liquid properties and bubble initial diameters have great impacts on bubble shapes. Moreover, flow patterns inside the bubbles with different initial diameters were analyzed and classified into three types under the condition of different bubble shapes. Three correlations for predicting the maximum internal circulation inside the bubbles in 86.73% glycerol were presented and the R-square values were all bigger than 0.98. Through analyzing the pressure and velocity distributions around the bubbles, four rules of bubble deformation were also obtained to explain and predict the shapes. 展开更多
关键词 MULTIPHASE FLOW Bubble Interface DEFORMATION ANALYSIS INTERNAL FLOW pattern rising behavior
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Effect of rapidly depressurizing and rising temperature on methane hydrate dissociation 被引量:11
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作者 Qingbai Wu Yingmei Wang Jing Zhan 《Journal of Natural Gas Chemistry》 EI CAS CSCD 2012年第1期91-97,共7页
关键词 dissociation of CH4 hydrate method of rapid depressurization method of rising temperature
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A Rising Force for the World-Wide Development of Laser-Induced Breakdown Spectroscopy 被引量:6
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作者 王哲 董凤忠 周卫东 《Plasma Science and Technology》 SCIE EI CAS CSCD 2015年第8期617-620,共4页
Laser-induced breakdown spectroscopy (LIBS) has attracted many academic and industrial interests world-wide due to its unique advantages, such as little or no sample preparation requirement, in-situ/online and multi... Laser-induced breakdown spectroscopy (LIBS) has attracted many academic and industrial interests world-wide due to its unique advantages, such as little or no sample preparation requirement, in-situ/online and multi-elemental analysis, and remote sensing etc., and it has been regarded as a "future super star" for chemical analysis for many years . In China, 展开更多
关键词 LIBS A rising Force for the World-Wide Development of Laser-Induced Breakdown Spectroscopy
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Comparative Study of Magmatism in East Pacific Rise Versus Nearby Seamounts:Constraints on Magma Supply and Thermal Structure Beneath Mid-ocean Ridge 被引量:3
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作者 ZHANG Guoliang 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2011年第6期1286-1298,共13页
Major elements of 2202 basalts from the East Pacific Rise (EPR) and 888 basalts from near- EPR seamounts are used to investigate their differences in magma crystallization pressures and mantle melting conditions. Cr... Major elements of 2202 basalts from the East Pacific Rise (EPR) and 888 basalts from near- EPR seamounts are used to investigate their differences in magma crystallization pressures and mantle melting conditions. Crystallization pressure calculation from basalts with 5.0wt%〈MgO〈8.0wt % shows that magma crystallization pressures beneath near-EPR seamounts are positively and negatively correlated with Nas and Fes, respectively. However, these correlations are indistinct in axial lavas, which can be explained by chemical homogenization induced by extensive mixing processes. In each segment divided by major transforms and over-lapping spreading centers (OSCs), near-EPR seamount lavas have higher magma crystallization pressures, higher Fes and lower Nas than the EPR lavas, which indicate cooler lithosphere, lower degrees and shallower melting depths beneath near-EPR seamounts than the EPR. The correlations between magma crystallization pressures and melting conditions beneath near-EPR seamounts imply that the source thermal state controls the melting degree and melt flux, and then melting process controls the shallow lithosphere temperature and magma crystallization depth (pressure). The cooler mantle sources beneath near-EPR seamounts produce a lower degree of melting and a less robust magma supply, which results in a deep thermal equilibrium level and high magma crystallization pressure. The magma crystallization pressure decreases significantly as spreading rate of the EPR increases from ~80 mm/year in the north (16~N) to ~160 mm/year in the south (19~S), while this trend is unobvious in near-EPR seamounts. This suggests that the magma supply controlled by spreading rate dominates the ridge crust temperature and magma crystallization depth, while the near-EPR seamount magma supply is not dominated by the axial spreading rate. Because most seamounts form and gain most of their volume within a narrow zone of 5-15 km from ridge axis, they provide good constraint on magma supply and thermal structure beneath the EPR. High magma crystallization pressures in seamounts indicate dramatic temperature decrease from the EPR. The crystallization pressures of seamount lavas are well correlated with mantle melting parameters but in a blurry relationship with axial spreading rate. Despite the adjacency of the EPR and nearby seamounts, the thermal structure beneath the near-EPR seamounts are controlled by their own magma supply and conductive cooling, chemically and thermally unaffected by magmatism beneath the ridge axis. 展开更多
关键词 crystallization pressure magma supply thermal structure SEamount East Pacific Rise
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Interaction of two in-line bubbles of equal size rising in viscous liquid 被引量:1
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作者 Zhen Tian Xi Li +1 位作者 Youwei Cheng Lijun Wang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2020年第1期54-62,共9页
The interaction of bubbles is the key to understand gas–liquid bubbling flow. Two-dimensional axis-symmetry computational fluid dynamics simulations on the interactive bubbles were performed with VOF method,which was... The interaction of bubbles is the key to understand gas–liquid bubbling flow. Two-dimensional axis-symmetry computational fluid dynamics simulations on the interactive bubbles were performed with VOF method,which was validated by experimental work. It is testified that several different bubble interactive behaviors could be acquired under different conditions. Firstly, for large bubbles(d: 4, 6, 8, 10 mm), the trailing bubble rising velocity and aspect ratio have negative correlations with liquid viscosity and surface tension. The influences of viscosity and surface tension on leading bubble are negligible. Secondly, for smaller bubbles(d: 1, 2 mm), the results are complicated. The two bubbles tend to move together due to the attractive force by the wake and the potential repulsive force. Especially for high viscous or high surface tension liquid, the bubble pairs undergo several times acceleration and deceleration. In addition, bubble deformation plays an important role during bubble interaction which cannot be neglected. 展开更多
关键词 BUBBLE column reactor Computational fluid dynamics BUBBLE INTERACTION BUBBLE rise velocity VOLUME-OF-FLUID method BUBBLE ASPECT ratio
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Auto-Test on Motor Temperature Rising in Electric Vehicles with Mutual MRAS 被引量:1
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作者 王志福 张承宁 《Journal of Beijing Institute of Technology》 EI CAS 2008年第4期395-399,共5页
A new method to calculate the motor temperature rising in electric vehicle (EV) is proposed based on the stator resistance identification. The measure theory of the motor temperature rising with the stator resistanc... A new method to calculate the motor temperature rising in electric vehicle (EV) is proposed based on the stator resistance identification. The measure theory of the motor temperature rising with the stator resistance is discussed at first. An enhanced magnetism motor dynamic math model is built which is the research object. Then the resistance identification system model is built on the mutual model reference adaptive,system (MRAS) theory. The simulation diagram of the mutual MRAS model is constructed and the resistance identification performance is studied in different motor states. Simulation results indicate that the stator resistance identification model with the mutual MRAS is effective. At the same time, the identification of motor temperature rising is possible with the identification of the stator resistance. 展开更多
关键词 electric vehicle (EV) motor's temperature rising model reference adaptive system (MARS) resistance identification
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Effect of pulse voltage rising time on discharge characteristics of a helium-air plasma at atmospheric pressure 被引量:1
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作者 钱沐杨 李桂 +4 位作者 刘三秋 张羽 李杉 林泽斌 王德真 《Plasma Science and Technology》 SCIE EI CAS CSCD 2017年第6期102-107,共6页
In this paper,the influence of voltage rising time on a pulsed-dc helium-air plasma at atmospheric pressure is numerically simulated.Simulation results show that as the voltage rising time increases from 10 ns to 30 n... In this paper,the influence of voltage rising time on a pulsed-dc helium-air plasma at atmospheric pressure is numerically simulated.Simulation results show that as the voltage rising time increases from 10 ns to 30 ns,there is a decrease in the discharge current,namely 0.052 A when the voltage rising time is 10 ns and 0.038 A when the voltage rising time is 30 ns.Additionally,a shorter voltage rising time results in a faster breakdown,a more rapidly rising current waveform,and a higher breakdown voltage.Furthermore,the basic parameters of the streamer discharge also increase with voltage rise rate,which is ascribed to the fact that more energetic electrons are produced in a shorter voltage rising time.Therefore,a pulsed-dc voltage with a short rising time is desirable for efficient production of nonequilibrium atmospheric pressure plasma discharge. 展开更多
关键词 atmospheric pressure plasma discharge voltage rising time numerical simulation
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Can the early bird catch the worm? Effects of early rising on leukocyte subsets via modification of autonomic nervous system and the effect on glucose levels 被引量:1
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作者 Mayumi Watanabe Yiwei Ling +5 位作者 Chikako Tomiyama Kiyoshi Adachi Hidetoshi Mori Kazushi Nishijo Toru Abo Kohei Akazawa 《Natural Science》 2013年第11期1133-1138,共6页
The importance of sleep has been described in proverbs such as “the early bird catches the worm”. However, there are few scientific reports on the effects of early rising. Therefore, early risers (Group E) and late ... The importance of sleep has been described in proverbs such as “the early bird catches the worm”. However, there are few scientific reports on the effects of early rising. Therefore, early risers (Group E) and late risers (Group L) were compared and the number and ratio of leukocytes, body temperature, glucose and its associated hormones were studied. Furthermore, each group was divided into two groups by the duration of sleep and the following four groups were compared: early risers with short sleep (Group E-S);early risers with long sleep (Group E-L);late risers with short sleep (Group L-S);and late risers with long sleep (Group L-L). Then, compared with Group L, Group E showed lower numbers and ratio of granulocytes and a higher ratio of lymphocytes showing parasympathetic nerve dominance. Group E showed higher levels of glucose and its related hormones than Group L, indicating sympathetic nerve dominance. Compared with Groups E-S and L-S, Groups E-L and L-L showed lower glucose and cortisol levels, respectively. These results indicated that early rising might affect leukocyte subsets, and adequate duration of sleep could decrease levels of glucose via modification of the autonomic nervous system. 展开更多
关键词 EARLY rising LEUKOCYTE AUTONOMIC Nervous System (ANS)
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Rising Foreign Investment in China, Despite Trade Tensions 被引量:1
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《China's Foreign Trade》 2018年第6期4-5,共2页
There has been no decline but rather a rise in foreign investment in China since the China-US trade dispute started earlier this year.In the first10months of this year,49,545new foreign-invested enterprises were set u... There has been no decline but rather a rise in foreign investment in China since the China-US trade dispute started earlier this year.In the first10months of this year,49,545new foreign-invested enterprises were set up nationwide,up89.3%over the same period last year,data from the Ministry of Commerce(MOC)showed. 展开更多
关键词 Despite Trade Tensions rising Foreign Investment in China
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