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脑出血扩散加权磁共振表现

中国医学影像技术 2008年第10期24卷 1558-1560页

作者：郑奎宏马林史丽静郭勇黄敏华张燕群赵书臣海军总医院放射科北京100037 解放军总医院放射科北京100853

目的观察脑出血不同时期扩散加权(DWI)磁共振表现。方法根据患者发病时间与磁共振检查间隔时间,将22例脑出血患者分为5组,其中超急性期3例;急性期3例;亚急性早期5例;亚急性晚期7例;慢性期4例。回顾性分析各组患者的常规及扩散加权磁共... 详细信息

目的观察脑出血不同时期扩散加权(DWI)磁共振表现。方法根据患者发病时间与磁共振检查间隔时间,将22例脑出血患者分为5组,其中超急性期3例;急性期3例;亚急性早期5例;亚急性晚期7例;慢性期4例。回顾性分析各组患者的常规及扩散加权磁共振表现。结果DWI显示超急性期及亚急性晚期两组血肿呈高信号;急性期、亚急性早期及慢性期血肿呈低信号。超急性期血肿边缘可见低信号环;超急性期、急性期及亚急性早期血肿周边可见高信号环。结论脑血肿各时期DWI表现有其独特的特点。DWI是鉴别脑血肿和脑梗死的重要手段。

关键词：脑出血磁共振成像

Preparation of FeCoNi medium entropy alloy from Fe^(3+)-Co^(2+)-Ni^(2+)solution system

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International Journal of minerals,Metallurgy and Materials 2025年第1期32卷 92-101页

作者： Zongyou Cheng Qing Zhao Mengjie Tao Jijun Du Xingxi huang Chengjun Liu Key Laboratory for Ecological Metallurgy of Multimetallic mineral(ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China Engineering Research Center of Frontier Technologies for Low-carbon Steelmaking(ministry of Education) Shenyang 110819China

In recent years,medium entropy alloys have become a research hotspot due to their excellent physical and chemical *** controlling reasonable elemental composition and processing parameters,the medium entropy alloys can exhibit similar properties to high entropy alloys and have lower *** this paper,a FeCoNi medium entropy alloy precursor was prepared via sol-gel and coprecipitation methods,respectively,and FeCoNi medium entropy alloys were prepared by carbothermal and hydrogen *** phases and magnetic properties of FeCoNi medium entropy alloy were *** showed that FeCoNi medium entropy alloy was produced by carbothermal and hydrogen reduction at 1500℃.Some carbon was detected in the FeCoNi medium entropy alloy prepared by carbothermal *** alloy prepared by hydrogen reduction was uniform and showed a relatively high ***,the hydrogen reduction product exhibited better saturation magnetization and lower coercivity.

关键词： medium entropy alloy sol-gel co-precipitation carbothermal hydrogen reduction

Investigating the p-Ω interactions and correlation functions

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Science China(Physics,Mechanics & Astronomy) 2025年

作者： Ye Yan Qi huang Youchang Yang Hongxia huang Jialun Ping Department of Physics Nanjing Normal University School of Science Guizhou University of Engineering Science

Motivated by experimental measurements, we investigate the p-Ω correlation functions and interactions on the basis of a quark model. By solving the inverse scattering problem with channel coupling, we renormalize the coupling to other channels into an effective single-channel p-Ω potentials. The effects of Coulomb interaction and spin-averaging are also discussed. According to our results, the depletion of the p-Ω correlation functions, which is attributed to the JP= 2+bound state not observed in the ALICE Collaboration's measurements(Nature 588, 232（2020）), can be explained by the contribution of the attractive JP= 1+component in spin-averaging. So far, we have provided a consistent description of the p-Ω system from the perspective of the quark model, including the energy spectrum, scattering phase shifts, and correlation functions. The existence of the p-Ω bound state has been supported by all three aspects. Additionally, a sign of the p-Ω correlation function's subtle sub-unity part can be seen in experimental measurements, which warrants more precise verification in the future.

关键词：

壳核背外侧异常信号在鉴别P型多系统萎缩与帕金森病中的诊断价值

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中国临床医学影像杂志 2017年第5期28卷 305-308,314页

作者：郑奎宏戚晓昆刘建国郭勇黄敏华马林解放军总医院放射科北京100853 海军总医院北京100048

目的:评价壳核背外侧异常信号在鉴别P型多系统萎缩(MSA-p)与帕金森病(PD)中的诊断价值。方法:对10例临床确诊的MSA-p型患者(MSA-p组)、20例年龄性别相匹配PD患者(PD组)行头颅常规MRI扫描及弥散加权成像。对各组每例患者的壳核萎缩、壳... 详细信息

目的:评价壳核背外侧异常信号在鉴别P型多系统萎缩(MSA-p)与帕金森病(PD)中的诊断价值。方法:对10例临床确诊的MSA-p型患者(MSA-p组)、20例年龄性别相匹配PD患者(PD组)行头颅常规MRI扫描及弥散加权成像。对各组每例患者的壳核萎缩、壳核背外侧弥散加权低信号及壳核背外侧裂隙征进行评价。结果:所有志愿者均顺利完成了上述检查,壳核异常信号常常见于MSA-p型患者。壳核萎缩征见于60%(6/10)MSA-p型患者,只见于10%(2/20)PD患者。MSA-p组80%(8/10)可见到壳核背外侧裂隙样T_2加权高信号及弥散加权低信号征,明显高于PD组(0/20)。壳核背外侧异常信号在鉴别MSA-p与PD中的特异度达到100%,敏感度达80%。结论:壳核背外侧裂隙样T_2加权高信号及弥散加权低信号是鉴别MSA-p与PD的特异性征象,具有重要的临床诊断价值。

关键词：多系统萎缩帕金森病磁共振成像

活心方加载对冠心病心绞痛患者动脉粥样硬化的影响

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时珍国医国药 2017年第1期28卷 136-138页

作者：荀培军尹亚辉徐燕尹媛媛岑戎黄敏华上海中医药大学附属曙光医院上海200021 上海市宝山区中西医结合医院上海201900

目的以心踝血管指数(cardio-ankle vascular index,CAVI)、踝臂指数(ankle-brachial index,ABI)、颈动脉内中膜厚度(intima-media thickness,IMT)及脉压(pulse pressure,PP)为观测指标,研究活心方对冠心病心绞痛患者动脉粥样硬化的影响。方法入选58例符合中医气虚血瘀证的冠心病心绞痛患者随机分为中药加载组(30例)和常规治疗组(28例),所有入选患者均采用西药常规治疗,中药加载组患者在西药常规治疗的基础上加用活心方,疗程3个月。分别于治疗前、治疗后检测两组患者的CAVI、ABI、IMT及PP,并进行统计分析。结果经治疗后,中药加载组CAVI、IMT降低,与治疗前及与常规治疗组相比有统计学意义(P0.05);中药加载组ABI升高,但与治疗前及与常规治疗组相比无统计学意义(P>0.05)。结论活心方能有效改善动脉粥样硬化,但不能明确对ABI的影响。

关键词：活心方冠心病心绞痛动脉粥样硬化气虚血瘀证

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外侧天幕窦增强磁共振表现及其临床意义

中国医学影像技术 2006年第8期22卷 1180-1182页

作者：郑奎宏郭勇林伟黄敏华张燕群陶丽冰赵书臣梁英魁钱明珠花焱海军总医院放射科北京100037

目的描述外侧天幕窦增强磁共振成像表现,评估其显示外侧天幕窦的能力与价值。方法随机抽取45例成年患者行颅脑磁共振增强扫描,回顾性分析其外侧天幕窦增强磁共振表现。结果90侧脑叶中发现外侧天幕窦78侧;其中Ⅰ型(烛台型)23侧(29%),Ⅱ型... 详细信息

目的描述外侧天幕窦增强磁共振成像表现,评估其显示外侧天幕窦的能力与价值。方法随机抽取45例成年患者行颅脑磁共振增强扫描,回顾性分析其外侧天幕窦增强磁共振表现。结果90侧脑叶中发现外侧天幕窦78侧;其中Ⅰ型(烛台型)23侧(29%),Ⅱ型(多干型)25侧(32%),Ⅲ型(静脉湖型)20侧(26%),Ⅳ型(不确定型)10侧(13%);62侧(69%)可以显示Labbe静脉。结论增强MRI可以很好的显示外侧天幕窦和Labbe静脉,这对于外科颅底手术了解其结构,避免静脉性梗死非常关键。

关键词：天幕窦磁共振成像 Labbe静脉

Experimental Study on Diesel Spray and Flame Asymmetry Characteristics of Dual-Orifice Nozzles for a Medium-Speed Engine

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Journal of Thermal Science 2025年第1期34卷 303-322页

作者： JU Dehao LIU Rui ZHENG Liang DENG Jiahui ZHANG Wenzheng HUO Jinlu huang Li Shanghai Marine Diesel Engine Research Institute National Key Laboratory of Marine Engine Science and Technology Key Laboratory for Power Machinery and Engineering Ministry of EducationShanghai Jiao Tong University

The asymmetry of the multi-orifice spray will cause uneven heat load of the marine diesel engine,thereby affecting its working performance and service ***,an in-depth understanding of the spray and flame characteristics of multi-orifice nozzles will guide the optimization of the nozzle structure,needle design and diesel atomization and combustion *** this reason,four groups of dual-orifice nozzles with different hole diameters(0.1-0.55 mm) and mass flow rates covering the typical marine medium-speed diesel injections are designed and customized,and the constant volume chamber(CVC) with high temperature and pressure is used to simulate the actual in-cylinder working conditions of the diesel engine for the spray visualization *** study the asymmetry of the fuel sprays discharged from a diesel injector,the multi-orifice nozzle is simplified as a dual-orifice nozzle in this *** with X-ray Computed Tomography(CT) imaging technology,the influences of the nozzle internal structure on the spray and flame asymmetry are studied in the constructed supercritical *** is found that the asymmetry of the inlet angle and the equivalent length-diameter ratio is positively correlated with the inconsistency of the dual *** an increase in the injection pressure and nozzle diameter,the asymmetry of the dual spray becomes more pronounced,resulting in greater disparities in the ignition delay times and ignition positions of the two ***,the increase in nozzle diameter also leads to combustion instability,resulting in a flame with a serrated *** the increase of ambient temperature,the proportion of liquid phase in the jet decreases and the relative density of spray front decreases.

关键词： atomization dual-orifice nozzle nozzle structure spray flame asymmetry

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原版外文期刊资源充分利用之对策

赣南师范学院学报 2007年第2期28卷 146-148页

作者：黄敏华吴素芸邓庆环赣南师范学院外国语学院江西赣州341000

原版外文期刊资源是高校教学的优质资源。但这宝贵的优质资源没得到充分的利用,其实际利用率比较低。为改变这种状况,本文提出从信息资源管理与教学两方面结合进行改革,提高原版外文期刊的利用率,以充分发挥教学优质资源的作用。

关键词：原版外文期刊资源利用期刊管理教学

Enhanced post-combustion CO2 capture and direct air capture by plasma surface functionalization of graphene adsorbent

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Journal of Energy Chemistry 2025年第1期100卷 653-664页

作者： Rahul Navik Eryu Wang Xiao Ding huang Yunyi Yiyu Liu Jia Li Guangdong-Hong Kong Joint Laboratory for Carbon Neutrality Jiangmen Laboratory of Carbon and Science and Technology Guangzhou HKUST Fok Ying Tung Research Institute The Hong Kong University of Science and Technology (Guangzhou) Carbon Neutrality and Climate Change Thrust Society Hub The Hong Kong University of Science and Technology (Guangzhou) Stoddart Institute of Molecular Science Department of Chemistry Zhejiang University

Graphene has enormous potential to capture CO2due to its unique properties and ***,graphene-based adsorbents have drawbacks of lower CO2adsorption capacity and poor *** work demonstrates a one-step rapid and sustainable N2/H2plasma treatment process to prepare graphene-based sorbent material with enhanced CO2adsorption *** treatment directly enriches amine species,increases surface area,and improves textural *** CO2adsorption capacity increases from 1.6 to 3.3 mmol/g for capturing flue gas,and from 0.14 to 1.3 mmol/g for direct air capture （DAC）.Importantly,the electrothermal property of the plasma-modified aerogels has been significantly improved,resulting in faster heating rates and significantly reducing energy consumption compared to conventional external heating for regeneration of *** aerogels display improved selectivity of 42 and 87 after plasma modification for 5 and 10 min,*** plasma-treated aerogels display minimal loss between 17%and 19% in capacity after 40 adsorption/desorption cycles,rendering excellent *** N2/H2plasma treatment of adsorbent materials would lower energy expenses and prevent negative effects on the global economy caused by climate change.

关键词： Carbon neutrality CO 2 capture Climate change Plasma treatment Graphene aerogel