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Interaction phenomena between lump and solitary wave of a generalized (3+1)-dimensional variable-coefficient nonlinear-wave equation in liquid with gas bubbles

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Communications in Theoretical Physics 2020年第8期72卷 18-26页

作者： jian-Guo Liu Wen-Hui Zhu yan He Ya-Kui wu College of Computer Jiangxi University of Traditional Chinese MedicineJiangxi 330004China Institute of artificial intelligence Nanchang Institute of Science and TechnologyJiangxi 330108China School of science Jiujiang UniversityJiangxi 332005China

In this paper, a generalized (3+1)-dimensional variable-coefficient nonlinear-wave equation is studied in liquid with gas bubbles. Based on the Hirota’s bilinear form and symbolic computation, lump and interaction solutions between lump and solitary wave are obtained,which include a periodic-shape lump solution, a parabolic-shape lump solution, a cubic-shape lump solution, interaction solutions between lump and one solitary wave, and between lump and two solitary waves. The spatial structures called the bright lump wave and the bright-dark lump wave are discussed. Interaction behaviors of two bright-dark lump waves and a periodic-shape bright lump wave are also presented. Their interactions are shown in some 3D plots.

关键词： solitary wave lump wave variable-coefficient nonlinear-wave equation interaction behaviors

Environmental Effects on Differential Organic Matter Enrichment of the Lower Cambrian Shale,Tarim Basin,NW China

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Acta Geologica Sinica(English Edition) 2023年第5期97卷 1523-1537页

作者： ZHAO Yawen wu Guanghui YI yan CHEN Yongquan wu Yonghong JING Bing WANG jian School of Geoscience and Technology Southwest Petroleum UniversityChengdu 610500China PetroChina Tarim Oilfield Company KorlaXinjiang 841000China Qiangtang Basin Research Institute Southwest Petroleum UniversityChengdu 610500China Southwest Petroleum University PetroChina Key Laboratory of Carbonate ReservoirCNPCChengdu 610500China PetroChina Southwest Oil&Gasfield Company Chengdu 610051China

Early Cambrian shale is an important petroleum source rock around the *** of little drilling data and poor seismic data,until recently,organic matter enrichment of the Lower Cambrian Yuertusi and Xishanbulake formations shale is still an enigma in the Tarim Basin,northwestern *** organic carbon(TOC),major and trace element data of Cambrian shale samples from five boreholes have been analyzed to decipher the mechanism of the organic matter *** results show that the shales deposited in the western restricted intraplatform have much higher TOC contents(3.2%-19.8%,on average 11.0%)than those from the eastern basin(2.2%-10.2%,on average 4.5%).The paleoproductivity proxies(Ba,Ba/Al,P/Al)in the western restricted platform are much higher than those in the eastern *** trace element indicators such as V/Cr,Ni/Co,Mo-TOC and Mo_(EF)-U_(EF)suggest an anoxic environment across the basin,but a more restricted environment in the western *** paleoproductivity rather than anoxic condition and hydrothermal activity are concluded to have resulted in the differentiation of the organic matter enrichment from the western intraplatform to eastern basin in the early Cambrian shales;the restricted environment was favorable for paleoproductivity and preservation of organic matter.

关键词： shale organic matter enrichment paleoproductivity restricted environment Cambrian Tarim Basin

人脐带间充质干细胞抑制脓毒症小鼠肺组织细胞的焦亡

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中国组织工程研究 2025年第31期29卷 6642-6648页

作者：何长良王炎罗玲刘坚中山市古镇人民医院呼吸与危重症医学科广东省中山市528400 湘潭市中心医院/湖南大学附属医院综合ICU 湖南省湘潭市411100

背景:急性肺损伤是脓毒症患者的常见严重并发症,其发病机制复杂,目前尚无有效的药物治疗方案。人脐带间充质干细胞通过抑制细胞过度焦亡从而改善脓毒症急性肺损伤的作用机制愈发受到重视。目的:探索人脐带间充质干细胞对脓毒症所致急性... 详细信息

背景:急性肺损伤是脓毒症患者的常见严重并发症,其发病机制复杂,目前尚无有效的药物治疗方案。人脐带间充质干细胞通过抑制细胞过度焦亡从而改善脓毒症急性肺损伤的作用机制愈发受到重视。目的:探索人脐带间充质干细胞对脓毒症所致急性肺损伤小鼠肺组织细胞焦亡的影响及机制。方法:48只Balb/c雄性小鼠按随机数字法分为假手术组、模型组、治疗组(n=16)。模型组、治疗组行盲肠结扎穿孔建立脓毒症所致急性肺损伤模型,假手术组仅开腹后缝合。治疗组术后6 h尾静脉注射200μL人脐带间充质干细胞悬液(5×105个细胞),模型组及假手术组术后6 h尾静脉注射200μL生理盐水。术后28 h,各组随机取5只小鼠予以尾静脉注射伊文思蓝检测肺血管通透性;收集各组剩余小鼠肺泡灌洗液和肺组织,ELISA检测肺泡灌洗液中白细胞介素1β、白细胞介素18水平,计数肺泡灌洗液中细胞总数及巨噬细胞数;苏木精-伊红染色观察肺组织病理学形态,TUNEL染色观察肺组织细胞焦亡情况,RT-PCR、Western blot检测肺组织中Toll样受体4、GSDMD及Caspase-11的mRNA和蛋白表达。结果与结论:与模型组相比,治疗组术后28 h肺血管通透性显著下降(P<0.05),肺泡灌洗液中白细胞介素1β、白细胞介素18水平降低(P<0.05),细胞总数及巨噬细胞数降低(P<0.05),肺损伤程度减轻,肺组织细胞焦亡指数降低(P<0.05),肺组织Toll样受体4、GSDMD、GSDMD-N及Caspase-11 mRNA及蛋白表达水平均显著下降(P<0.05)。结果表明,人脐带间充质干细胞可能通过抑制Toll样受体4/Caspase-11/GSDMD信号通路活化,改善肺组织细胞焦亡,从而在一定程度上改善脓毒症小鼠肺损伤的严重程度。

关键词：人脐带间充质干细胞 Toll样受体4 Caspase-11 GSDMD 急性肺损伤急性呼吸窘迫综合征细胞焦亡脓毒症工程化干细胞

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Application of tellurium in free-cutting steels

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Journal of Iron and Steel Research International 2018年第8期25卷 787-795页

作者： Ping Shen Qian-kun yang Dong Zhang yan-xin wu jian-xun Fu State Key Laboratory of Advanced Special Steel Shanghai Key Laboratory of Advanced Ferrous Metallurgy School of Materials Science and Engineering Shanghai UniversityShanghai 200444 China Institute of Material Science and Engineering National Taiwan University Taipei 10617 Taiwan China

Te is widely used in iron and steel industry. After adding a certain amount of Te in the steel, many physical and chemical properties can be improved. As a free-cutting element, a small amount of Te can significantly improve the machinability of steel. The existing form of Te in the steel, the modification law of MnS inclusion by Te and the influence rule and mechanism of Te on the machinability of steel are summarized and expounded in detail, providing a reference for further study and development of Te-containing free-cutting steels.

关键词： Tellurium - Inclusion Sulfide modification Free-cutting steel

ANALYSIS OF MESOSCALE CONVECTIVE SYSTEMS OVER TIBETAN PLATEAU IN SUMMER

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Chinese Geographical Science 2006年第2期16卷 116-121页

作者： GUO Zhong-yang DAI Xiao-yan wu jian-ping LIN Hui Key Laboratory of Geographic Information Science of Ministry of Education East China Normal University Shanghai 200062 P. R. China Department of Geography and Resource Management ＆ Joint Laboratory for Geolnformation Science the Chinese University of Hong Kong Hong Kong P. R. China

In this paper, Geostationary Meteorological Satellite (GMS) infrared black-body temperature (Tbb) data from June to August 1998 are used to automatically track the activity of Mesoscale Convective System (MCS) over the Tibetan Plateau in China. Consequently, the features of MCS, such as area, intensity, life cycle, activity region and shape, are obtained. High Resolution Limited Area Analysis and Forecasting System (HLAFS) values provided by China National Meteorological Center are used to study the relationships between the MCS trajectories and their environmental physical field values, based on the distribution and trajectories of MCSs over the Tibetan Plateau. Favorable environmental physical field charts of influencing MCS movement out of the Tibetan Plateau in different UTC (Universal Time Coordinate) are developed by using spatial data mining techniques at levels of 400hPa and 500hPa, respectively.

关键词： Tibetan Plateau Mesoscale Convective Systems black-body temperature automatically tracking

Analysis on composition and inclusions of ballpoint pen tip steel

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International Journal of Minerals,Metallurgy and Materials 2018年第4期25卷 420-428页

作者： Qian-kun yang Ping Shen Dong Zhang yan-xin wu jian-xun Fu State Key Laboratory of Advanced Special Steel Shanghai Key Laboratory of Advanced Ferrometallurgy School of Materials Science and Engineering Shanghai University

Ballpoint pen tip steel, a super free-cutting stainless steel, exhibits excellent corrosion resistance and good machining properties. In this study, inductively coupled plasma spectroscopy, metallographic microscopy, and scanning electron microscopy were used to determine the elemental contents in five ballpoint pen tips and their components, morphologies, and inclusion distributions. The results showed that the steels were all S–Pb–Te super free-cutting ferritic stainless steel. The free-cutting phases in the steels were mainly Mn S, Pb, and small amounts of Pb Te. Mn S inclusions were in the form of chain distributions, and the aspect ratio of each size inclusion in the chain was small. The stress concentration effect could substantially reduce the cutting force when the material was machined. Some of the Pb was distributed evenly in the steel matrix as fine particles（1–2 μm）, and the rest of the Pb was distributed at the middle or at both ends of the Mn S inclusions. The Pb plays a role in lubrication and melting embrittlement, which substantially increases the cutting performance. Pb Te was also usually distributed in the middle and at both ends of the Mn S inclusions, and Te could convert the sulfides into spindles, thereby improving the cutting performance of the steel.

关键词： ballpoint pen tip free-cutting stainless steel inclusions lead tellurium

In situ preparation of Ag@AgCl/Bio-veins composites and their photocatalytic activity and recyclability

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Frontiers of Chemical Science and Engineering 2023年第7期17卷 906-917页

作者： Min Zou Chao Tan Zhengqiu Yuan Ming wu jian jian Lei Zhang yan Zhang Zhou Ma Hu Zhou School of Resource&Environment and Safety Engineering Hunan University of Science and TechnologyXiangtan 411201China Key Laboratory of Theoretical Organic Chemistry and Functional Molecules Ministry of EducationFunctional Film Materials Engineering Research Center of Hunan ProvinceHunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and ConversionSchool of Chemistry and Chemical EngineeringHunan University of Science and TechnologyXiangtan 411201China School of Information and Electrical Engineering Hunan University of Science and TechnologyXiangtan 411201China

The industrial application of nano-photocatalysts in wastewater treatment has been severely restricted for a long time due to their difficult separation,poor reusability,and low *** this work,a facile strategy was proposed to enhance the photocatalytic activity and recovery performance of Ag@AgCl *** veins(Bio-veins)with a unique 3D porous construction were used as carriers for the in-situ growth of Ag@AgCl *** electron microscopy results showed that the Ag@AgCl nanoparticles were uniformly loaded on the surface and interior of the Bio-veins,and the size of the Ag@AgCl nanoparticles immobilized on the Bio-veins(50–300 nm)was significantly smaller than Ag@AgCl obtained by the co-precipitation method(1–3μm).The Bio-veins played a vital role in the photocatalysis reaction *** degradation efficiency of the Ag@AgCl/Bio-veins(CI4)was up to 3.50 times as high as pure Ag@***,the composites also exhibited excellent recyclability and stability under both visible and solar *** work provided a suitable strategy for nano-photocatalysts for practical application and may also offer new possibilities for the high-value utilization of biomass materials.

关键词： Ag@AgCl biological veins photocatalytic activity recyclability

Influence of on-line tempering parameters on microstructure of medium-carbon steel

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Journal of Iron and Steel Research International 2017年第1期24卷 59-66页

作者： Hua Zhang yan-xin wu jian-xun Fu Jie Xu Qi-jie Zhai State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200072China

A new process involving ultra-fast cooling（UFC）and on-line tempering（OLT）was proposed to displace austempering process,which usually implements in a salt/lead bath and brings out serious pollution in the industrial *** optimization of the new process,involving the evolution of the microstructure of medium-carbon steel during various cooling paths,was *** results show that the cooling path affected the final microstructure in terms of the fraction of pearlite,grain size and distribution of cementite in *** the cooling rate or decreasing the OLT temperature contributes to restraining the transformation from austenite to ferrite,and simultaneously retains more austenite for the transformation of *** is also noted that bainite was observed in the microstructure at the cooling rate of 45℃/s and the OLT temperature of 500℃.Through either increasing the cooling rate or decreasing the OLT temperature,the distribution of cementite in pearlite is more dispersed and grain is *** the possibility of industrial applications into account,the optimal process of cooling at 45℃/s followed by OLT at 600℃ after hot rolling was determined,which achieves a microstructure containing nearly full pearlite with an average grain size of approximately 7μm and a homogeneously dispersed distribution of cementite in pearlite.

关键词： Medium-carbon steel Ultra-fast cooling On-line tempering Phase transformation kinetics

Variations of bacterial and fungal communities along a primary successional chronosequence in the Hailuogou glacier retreat area(Gongga Mountain, SW China)

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Journal of Mountain Science 2016年第9期13卷 1621-1631页

作者： SUN Hong-yang wu yan-hong ZHOU Jun BING Hai-jian Key Laboratory of Mountain Surface Processes and Ecological Regulation Institute of Mountain Hazards and Environment Chinese Academy of Sciences

New terrestrial habitats have emerged and a primary succession has developed in the retreat area （29°34＇N, 102°oo＇E, 2951-2886 m） after the retreat of the Hailuogou glacier. To investigate soil microbial changes along the primary successional chronosequence, mixed soil samples were collected at six sites at different ages （2 young sites, 2 mid-aged sites, and 2 old sites）. The RNA was extracted and amplified. Bacterial 16S rRNA and fungal 18S rRNA were analyzed using high-throughput 454 pyrosequencing analysis. Overall, pyrosequeneing showed that Proteobacteria, Acidobacteria, Baeteroidetes and Actinobacteria were the main bacterial phyla, and the fungal communities were strongly dominated by the phyla Ascomyeota and Basidiomyeota in the retreat area. The Shannon diversity index （Hshannon） of bacteria was 6.5 - 7.9, and that of fungi was 2.2 - 4.1 in these sites. For the bacterial communities, diversity and evenness values were highest on the mid-age sites and were relatively low on the young trend was observed for the and old sites. A similar fungal communities. In contrast, soil properties showed significant linear distributional trends （increase or decrease） with the age of the site. Combining the linear change patterns of soil properties, the highest values of bacterial and fungal evenness and diversity in the mid-aged sites indicated that there was less environmental stress and more niches for microbial communities in the middle successional stage compare with other stages. In addition, our analysis showed that microbial communities were the main drivers that build a soil organic matter pool to expedite pedogenesis for ecosystem succession. This primary succession in the Hailuogou glacier retreat area is developing rapidly compared with that in other glacier retreats.

关键词： Primary successional chronosequence Microbial community Soil properties 454sequencing Rapid succession