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Research on the Fe-silicon nitride material self-producing N_2 at high temperature

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Journal of University of Science and Technology Beijing 2006年第1期13卷 78-81页

作者： Junhong Chen Xueda Wang jialin Sun Huasheng Zhan Wen song Department of Inorganic and Nonmetallic Materials University of Science and Technology Beijing Beijing 100083 China School of Material Science and Technology Anshan University of Science and Technohology Anshan 114002 China

The Fe silicon nitride synthesized by flashing combustion process was studied to determine the reaction temperature between Fe and silicon nitride, the account of N2 given out in the course of the reaction, and the change of the microstructure during calcination. The results showed that at 1127.2℃ the Fe-silicon nitride self-reacts and releases N2 and under 101.3 kPa the volume of N2 given out in the course of the reaction is 20 times more than that of the starting material. N2 is produced quickly, and completes in several decade seconds. With the producing of N2, the structure of Silicon Nitride around Fe becomes loose and porous, or cracks are formed by the reaction between Fe and silicon nitride. So if it is made use of that Fe-silicon nitride self-producing N2 at the high temperature, the performance of the material on a base of Fe-silicon nitride could be greatly improved.

关键词： synthesis by flashing combustion process Fe-Silicon Nitride Nitrogen

Alterations in microbial community during the remediation of a black-odorous stream by acclimated composite microorganisms

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Journal of Environmental Sciences 2022年第8期34卷 181-193页

作者： Feng Shi Zongli Liu jialin Li Huiwang Gao song Qin Jingjing Guo Key Lab of Coastal Biology and Biological Resource Conservation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Qingdao HOOH Environmental Protection Technology Co.Ltd.Qingdao 266073 China

Microbial application is an efficient, economical, and ecofriendly method for remediating black-odorous rivers. In this study, the field treatment effect and microbial community changes were monitored during remediation by the acclimated complex microorganisms of a typical black-odorous stream. After the treatment, the total phosphorus and ammonia contents decreased by 74.0% and 76.3% and the concentrations of dissolved oxygen increased from 1.65 to 4.90 mg/L, indicating the effectiveness of the acclimated composite microorganisms. The proportion of Bacteroidetes decreased significantly by 48.1% and that of Firmicutes increased by 2.23% on average, and the microbial diversity index first increased and then tended to be uniform. Redundancy analysis demonstrated that the pH,dissolved oxygen, and oxidation-reduction potential together determined the composition of the microbial communities(p < 0.05). These findings showed that the acclimated composite microorganisms can effectively remediate the black odor.

关键词： Black-odorous water Composite microorganisms Microbial community Environmental impact factors In-siu bioremediation

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应变率显像对糖尿病患者左室收缩功能的评价

临床超声医学杂志 2007年第2期9卷 83-85页

作者：段炼黎春雷邓又斌刘娅妮宋家琳童春华中科技大学同济医学院附属同济医院超声影像科武汉430030

目的探讨应变率显像(SRI)技术评价糖尿病患者左室收缩功能的临床价值。方法获取33例糖尿病患者和26例正常人心尖左心长轴、二腔和四腔切面应变率曲线,测量左室各节段心肌收缩期峰值应变率和二尖瓣环峰值应变率(SR)。用Simpson法测量左... 详细信息

目的探讨应变率显像(SRI)技术评价糖尿病患者左室收缩功能的临床价值。方法获取33例糖尿病患者和26例正常人心尖左心长轴、二腔和四腔切面应变率曲线,测量左室各节段心肌收缩期峰值应变率和二尖瓣环峰值应变率(SR)。用Simpson法测量左室射血分数(LVEF)。结果与正常组相比,糖尿病组左室各节段心肌的纵向SR均明显降低(P<0.05),瓣环的SR与LVEF呈正相关(r=0.619,P<0.05)。结论SRI为定量评价糖尿病患者左室整体和局部收缩功能提供了无创的新方法。

关键词：糖尿病应变率显像心室功能,左

Effects of Temperature and Light on Growth Rate and Photosynthetic Characteristics of Sargassum horneri

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Journal of Ocean University of China 2021年第1期20卷 101-110页

作者： WANG Yong ZHONG Zhihai QIN song LI jialin LI Jingjing LIU Zhengyi Key Laboratory of Marine Hazards Forecasting Ministry of Natural ResourcesHohai UniversityNanjing 210098China Yantai Institute of Coastal Zone Research Chinese Academy of SciencesYantai 264003China

The changing environmental factors exerted great influences on coastal macroalgal *** study the responses of the brown seaweed Sargassum horneri to temperature and light,*** was cultured under three temperatures(20,25 and 30℃)and three light intensities(30,60,and 120μmol photons m-2 s-1)for seven *** growth rate,chlorophyll a(Chl a)and carotenoids(Car)contents,chlorophyll fluorescence,and photosynthetic oxygen evolution rate were *** results show that the highest relative growth rate(RGR),maximal electron transport rate(rETRmax);the net photosynthetic rate(Pn)were observed at the lowest temperature(20℃)and highest light intensity(120μmol photons m-2 s-1);and the RGR and Pn were significantly inhibited by the highest temperature(30℃),especially at the lowest light intensity(30μmol photons m-2 s-1)(P<0.05).Additionally,the highest light intensity enhanced the non-photochemical quenching(NPQ)even under the highest temperature(30℃),indicating that the higher light intensity could induce photo-protection reaction of *** results suggest that the higher temperature and lower light intensity exerted negative influences on ***.

关键词： chlorophyll fluorescence parameter ocean warming oxygen electrode photosynthetic activity Sargassum horneri transparency

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国产酒花香气成分及酿造特性的研究

中国酿造 2022年第10期41卷 49-54页

作者：徐恒远丁志成王啸尘刘津尚孙少康宋家麟王玉张浩军聂聪齐鲁工业大学生物工程学院山东济南250353 甘肃亚盛绿鑫啤酒原料集团有限责任公司甘肃酒泉735000

为探究国产酒花在啤酒酿造中的酿造价值,将7种中国本土种植和培育的啤酒花(卡斯卡特、D1号、拿盖特、柯密特、青岛大花、哥伦布、哈拉道)在模拟啤酒酿造过程中添加,并在关键酿造节点取样,使用气相色谱-质谱(GC-MS)技术分析酒花在啤酒酿... 详细信息

为探究国产酒花在啤酒酿造中的酿造价值,将7种中国本土种植和培育的啤酒花(卡斯卡特、D1号、拿盖特、柯密特、青岛大花、哥伦布、哈拉道)在模拟啤酒酿造过程中添加,并在关键酿造节点取样,使用气相色谱-质谱(GC-MS)技术分析酒花在啤酒酿造过程中不同时期香气成分,并通过感官品评综合评估其酿造价值。结果表明,7种国产酒花香气成分均能满足啤酒酿造要求,除哥伦布为高α-酸酒花,青岛大花为苦型酒花外,其余品种均为苦香兼优型酒花,该类酒花既可煮沸时添加也可用于后期酒花干投,其中,卡斯卡特酒花与D1号酒花干投样品中月桂烯含量分别为0.458μg/L、0.324μg/L,远高于一般酒花,非常适合印度淡色艾尔啤酒(IPA)酿造。

关键词：国产酒花香气成分感官品评酿造特性

Plasma-activated ethanol solution and it's decontamination effect

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High Voltage 2023年第4期8卷 833-840页

作者： YiQian Li jialin Liu Feng Zhao Ke song LanLan Nie DaWei Liu XinPei Lu State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhanHubeiChina Department of Thoracic Surgery Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Center of Stomatology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina

Ethanol solution as a disinfectant has been widely used in various ***,it has a significant bactericidal capability only when the volume fraction of ethanol is around 70%-75%.For such high concentration of ethanol solution,it has an irritating *** it is used for applications such as wound disinfection,it causes a stinging *** concentrations of ethanol solution are less irritating,but it is also less effective at killing *** this study,an idea for producing a green,efficient and less irritating disinfectant is *** is based on a plasma-activated low-concentration ethanol solution(PAES).It is found that the plasma-activated 10% volume fraction of ethanol solution can kill more than seven orders of magnitude of Escherichia coli,while the untreated 10% volume fraction of ethanol solution has no bactericidal ***,the PAES's activity remains unchanged after being stored at -20℃ for three *** investigation shows that new compositions including peracetic acid,peroxynitrite,hydrogen peroxide and acetic acid are detected in the PAES,which together are playing the main role of the excellent and prolonged bactericidal effect.

关键词： effect. ethanol unchanged

Distribution Patterns of Synechococcus Indicated Their Environmental Constraints and Related Geochemical Processes in the Yellow Sea

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Journal of Ocean University of China 2022年第2期21卷 499-508页

作者： ZHOU Yuting WANG Ting CHEN Xi QIN song ZHAO Zhenjun GUO Xinyi LI jialin Yantai Institute of Coastal Zone Research Chinese Academy of SciencesYantai 264000China College of Life Sciences Yantai UniversityYantai 264000China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China College of Marine Life Science Ocean University of ChinaQingdao 266005China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Synechococcus is a widely distributed photosynthetic pico-phytoplankton,which contributes mainly to carbon fixation and maintains the stability of the marine *** investigate its distribution patterns in the Yellow Sea,seawater samples were collected during September *** of flow cytometry analysis showed that the Synechococcus abundance ranged from 6.36×10^(2) to 4.51×10^(4) cells mL^(−1),which correlated with salinity(P<0.01)and temperature(P<0.05).At deeper off-shore sites,Synecho-coccus showed high abundance at the subsurface thermo-halocline,which was in accordance with chlorophyll a(Chl a)content along the vertical *** on the high-throughput sequencing data of rpoC1(partial gene encoding RNA polymerase),two Synechococcus subclusters,S5.1 and S5.2,were found to coexist in the studied *** clades of S5.1,including Clades I,II,and III,were the dominant components,accounting for 6.63%,26.11%,and 45.5%of the total genus,*** analysis(RDA)showed that nitrite was the main environmental factor that explained the genus composition among ***-thermore,co-occurrence network revealed that the main phyla that coexisted with Synechococcus were Proteobacteria,Bacteroidetes,Actinobacteria,Planctomycetes,and Verrucomicrobia,which were involved in the carbon(C),nitrogen(N),sulfur(S),and manga-nese(Mn)***,Synechococcus exhibited biogeographic distribution correlated with temperature-salinity and nitrite in the Yellow Sea,and their geochemical function showed diverse but should be further verified in the future.

关键词： Synechococcus distribution characteristics environmental constraints co-occurrence network analyses the Yellow Sea

基于改进插值HHT算法的输电线路行波故障测距

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国外电子测量技术 2019年第9期38卷 1-6页

作者：闫丽梅付春耕徐建军宋佳琳杨帆张琰骏东北石油大学电气信息工程学院

基于希尔伯特-黄变换(HHT)的输电线路故障测距是否精确取决于经验模态分解(EMD)的效果。而EMD采用三次样条插值方法在包络拟合时易出现过拟合与欠拟合现象,导致希尔伯特变换(HT)的效果和精度不高。三次三角埃尔米特插值结合了函数的导数... 详细信息

基于希尔伯特-黄变换(HHT)的输电线路故障测距是否精确取决于经验模态分解(EMD)的效果。而EMD采用三次样条插值方法在包络拟合时易出现过拟合与欠拟合现象,导致希尔伯特变换(HT)的效果和精度不高。三次三角埃尔米特插值结合了函数的导数值,使得插值的精度更高。因此,将三次样条插值改换为三次三角埃尔米特插值,从而可以有效地提高输电线路故障测距的精度。在PSCAD平台上搭建400kV仿真模型,获得故障电流信号,采取经验模态分解,将首个分量进行希尔伯特变换,处理后的暂态行波波头对应时刻即为暂态故障信号到达时刻,最后根据两端定位方法实现故障定位。仿真结果表明,该方法能够更可靠的检测出暂态波头到达时刻,定位精度明显提高。

关键词：希尔伯特-黄变换经验模态分解埃尔米特插值行波故障测距

交互式实践教学在军队任职教育学员介入超声培训中的应用

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临床超声医学杂志 2017年第2期19卷 135-136页

作者：盛建国章建全宋家琳刁宗平付静赵佳琦第二军医大学附属长征医院超声诊断学教研室上海市200003

目的探讨交互式实践教学对提高军队任职教育学员介入超声专业能力的作用。方法选取我校2015级31名军队任职教育培训学员为研究对象,随机分为交互式实践教学组16名和传统教学对照组15名,均进行4周共计80学时的集中培训后,考核评价两种教... 详细信息

目的探讨交互式实践教学对提高军队任职教育学员介入超声专业能力的作用。方法选取我校2015级31名军队任职教育培训学员为研究对象,随机分为交互式实践教学组16名和传统教学对照组15名,均进行4周共计80学时的集中培训后,考核评价两种教学方法的培训效果。结果与传统教学对照组比较,交互式实践教学组在介入超声理论知识掌握和操作技能考核方面得分均较高,差异均有统计学意义(均P<0.05)。结论交互式实践教学有效激发了具有一定工作基础的军队任职教育学员对于介入超声专业的学习兴趣,能够显著提高其专业实践能力。

关键词：介入超声交互式教学法任职教育