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高含水致密凝析气藏稳产技术应用——以四川盆地安岳气田须家河组气藏为例

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天然气勘探与开发 2024年第1期47卷 83-88页

作者：罗炫张文彪严鸿杨通水雷一文中国石油西南油气田公司蜀南气矿四川泸州646000 天府永兴实验室四川成都610213

四川盆地安岳气田上三叠统须家河组二段气藏为低孔、低渗、有水、中含凝析油、弹性气驱、高压岩性圈闭的砂岩气藏,气藏底水能量充足。针对气井生产过程中受地层水水侵和反凝析污染影响造成稳产难度较大的情况,结合储层及气井产液特征,... 详细信息

四川盆地安岳气田上三叠统须家河组二段气藏为低孔、低渗、有水、中含凝析油、弹性气驱、高压岩性圈闭的砂岩气藏,气藏底水能量充足。针对气井生产过程中受地层水水侵和反凝析污染影响造成稳产难度较大的情况,结合储层及气井产液特征,开展有水凝析气井稳产技术应用实践,分析并总结应用实践经验和成果,选取了应用效果较好的注气吞吐、电潜泵排水、车载压缩机气举、柱塞气举排液和自动化开关井5种稳产技术。结果表明:①针对储层反凝析液伤害,形成单井注气吞吐技术应用选井原则;②针对气藏水体赋存特征和水侵模式特征,调整气藏排水采气对策思路,采用电潜泵排水技术和车载压缩机气举技术;③针对地层压力低、举升能量不足,优化油、气、水三相流动条件下的柱塞气举排液技术;④针对低压间歇生产井采用自动化开关井技术,增加生产效率,降低人工成本。对5种主要稳产技术的应用情况进行了分析评价,认为一系列稳产技术的应用有助于安岳气田须二段气藏稳定生产,为类似高含水致密凝析气藏的稳产提供了借鉴和参考。

关键词：有水砂岩气藏反凝析污染柱塞气举排液注气吞吐须家河组气藏稳产技术

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森林健康经营对森林碳汇的作用及提高策略

林业科技情报 2024年第2期56卷 106-109页

作者：穆嘉琳杨梅罗璇翟悦宁陈明珠北京市昌平区园林绿化局北京102200 北京市昌平区园林绿化局园林绿化资源监测中心北京102299

在现阶段全球气候变暖的背景下,本文以昌平区第九次森林清查结果为基础阐述科学合理的森林健康经营措施对扩大森林面积、优化森林结构,促进森林发展,提高森林固碳能力的影响。结果显示昌平幼龄林与中龄树蓄积增长迅速,二者占碳汇总价达6... 详细信息

在现阶段全球气候变暖的背景下,本文以昌平区第九次森林清查结果为基础阐述科学合理的森林健康经营措施对扩大森林面积、优化森林结构,促进森林发展,提高森林固碳能力的影响。结果显示昌平幼龄林与中龄树蓄积增长迅速,二者占碳汇总价达68.9%,近熟林碳汇价值低,仅2377.33万元。昌平亟需合理经营措施促进森林正向演替,即通过加强碳活动样地建设,积极开展科学经营管理,重视碳汇树种的培育,加强天然林资源保护,积极开展宣传活动,积极利用政府政策的有效措施,从而对今后森林碳汇发展起到积极作用。

关键词：森林健康经营碳汇温室效应

Efficient charge transfer in WS2/WxMo1-xS2 heterostructure empowered by energy level hybridization

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Science China(Information Sciences) 2023年第2期66卷 219-226页

作者： Xuhong AN Yehui ZHANG Yuanfang YU Weiwei ZHAO Yutian YANG Xianghong NIU xuan luo Junpeng LU Jinlan WANG Zhenhua NI School of Physics and Key Laboratory of MESMS of the Ministry of Education Southeast University New Energy Technology Engineering Laboratory of Jiangsu Province and School of Science Nanjing University of Posts and Telecommunications Key Laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of Sciences

Photoinduced charge transfer(CT) is decisive to the efficiency and speed of photoelectric conversion in two-dimensional(2D) van der Waals(vd Ws) heterostructures. Generally, CT rate enhancement is realized by increasing the band offset(BO). In this study, we propose that a fast and efficient CT can be realized via strong hybridization of energy levels in 2D vd Ws heterostructures with minimal BO. Firstprinciples calculations reveal that the smallest energy difference between conduction-band edges and minimal BO in the WS2/WxMo1-xS2(x = 0.78) heterostructure yields the strong hybridization of energy levels and then results in ultrafast CT(2.7 ps). Experimental results agree with theoretical calculations. The photoluminescence of WS2is quenched in the WS2/WxMo1-xS2(x = 0.78) heterostructure, attributable to the strong hybridization-induced fast and efficient CT. This study provides insights into the mechanism of CT in heterostructures and offers new strategies to create superior optoelectronic devices with fast and efficient photoelectric conversion.

关键词： van der Waals heterostructure band offset hybridization strength charge transfer photoluminescence quenching

Preparation of （2E）-3-（4＇-Halophenyl）prop-2-enoyl Sulfachlorpyridazine Sodium Salts and Their Interaction with Bovine Serum Albumin by Fluorescence Spectroscopy

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Chemical Research in Chinese Universities 2013年第5期29卷 854-860页

作者： DU Chuan-rong luo xuan WEI Jin-rui HE Ting-ting ZHENG Xiao-yu LIN Cui-wu School of Chemistry and Chemical Engineering Guangxi University Nanning 530004 P. R. China

Three （2E）-3-（4＇-halophenyl）prop-2-enoyl sulfachlorpyridazine sodium salts（XPSCA） were synthesized. Their chemical structures were confirmed by IH NMR and 13C NMR, electrospray ionization mass spectrometry （ESI-MS）, and infrared（IR） spectroscopy. The interactions between XPSCA and bovine serum albumin（BSA） were investigated under imitated physiological condition by fluorescence quenching technique and UV-Vis absorption spectroscopy according to the Stern-Volmer equation. The results from the emission quenching at different tempera- tures indicate that the quenching mechanism of serum albumin by XPSCA was static quenching mechanism at low XPSCA concentrations or a combined quenching（static and dynamic） mechanism at higher XPSCA concentrations. At different temperatures, the binding constant and the binding sites of XPSCA with BSA were investigated, and the distances were evaluated according to F6rster non-radiative resonance energy transfer theory. The thermodynamic parameters were calculated according to van＇t Hoff equation, which implies that both van der Waals interaction and hydrogen bond played major roles in stabilizing the XPSCA-BSA complexes, whereas hydrophobic interactions were secondary. Moreover, the conformational changes in BSA were analyzed by synchronous fluorescence spectra.

关键词： Sulfachlorpyridazine sodium Bovine serum albumin Halo-cinnamic acid Fluorescence spectroscopy

The promoting effect of interstitial hydrogen on the oxygen reduction performance of PtPd alloy nanotubes for fuel cells

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Nano Research 2023年第2期16卷 2366-2372页

作者： Tingting Chao xuan luo Mengzhao Zhu Yanmin Hu Yida Zhang Yunteng Qu Hantao Peng Xiaoshuang Shen Xusheng Zheng Liang Zhang Xun Hong Center of Advanced Nanocatalysis(CAN) Department of Applied ChemistryUniversity of Science and Technology of ChinaHefei 230026China Country Center for Combustion Energy and School of Vehicle and Mobility Tsinghua UniversityBeijing 100084China National Synchrotron Radiation Laboratory(NSRL) University of Science and Technology of ChinaHefei 230029China Department of Chemical Physics University of Science and Technology of ChinaHefei 230026China School of Physical Science and Technology Yangzhou UniversityYangzhou 225002China

Highly efficient and stable oxygen reduction reaction(ORR)electrocatalysts are remarkably important but challenging for advancing the large-scale commercialization of practical proton exchange membrane fuel cells(PEMFCs).In this work,we report that the introduction of interstitial hydrogen atoms into PtPd nanotubes can significantly promote ORR performance without scarifying the *** enhanced mass activity was 8.8 times higher than that of commercial Pt/*** accelerated durability test showed negligible activity attenuation after 30,000 ***,H2/O2 fuel cell tests further verified the excellent activity of PtPd-H nanotubes with a maximum power density of 1.32 W·cm^(−2),superior to that of commercial Pt/C(1.16 W·cm^(−2)).Density functional theory calculations demonstrated the incorporation of hydrogen atoms gives rise to the broadening of Pt d-band and the downshift of d-band center,which consequently leads to the weaker intermediates binding and enhanced ORR activity.

关键词： hydrogen atoms incorporation alloy d-band structure regulation oxygen reduction reaction fuel cell

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名老中医医案小儿遗尿证候特点分析

光明中医 2024年第18期39卷 3603-3607页

作者：罗璇彭汇宜郝兴宇胡杨欧阳聪蒋屏湖南中医药大学第一附属医院儿童医学中心湖南长沙410007

目的探究小儿遗尿证型的中医证候特点,为临床辨证提供指导。方法采用线上数据库检索和线下图书馆人工检索相结合的方式,以“遗尿”or“遗溺”and“名老中医”or“名中医”and“医案”or“经验”为关键词,收集1949—2022年名老中医治疗... 详细信息

目的探究小儿遗尿证型的中医证候特点,为临床辨证提供指导。方法采用线上数据库检索和线下图书馆人工检索相结合的方式,以“遗尿”or“遗溺”and“名老中医”or“名中医”and“医案”or“经验”为关键词,收集1949—2022年名老中医治疗小儿遗尿医案,构建名老中医诊治小儿遗尿医案数据库。运用频数分析、主要成分因子分析与聚类分析,归纳常见证型的证候特征,研究医案中遗尿患儿的中医证候分布特点。结果共纳入350例医案,将频次≥15的四诊信息进行因子分析,得到12个公因子。将公因子进行聚类分析,结合中医专业知识,最终确定6种常见证候特点。结论小儿遗尿主要病位证素为肾、脾、肝,病性证素为阳虚、气虚、血虚、阴虚。从肝论治小儿遗尿以热证及郁证多见。因此临床治疗应以温补脾肾为主,配合泻肝清热利湿或疏肝之法。

关键词：小儿遗尿名老中医医案证候

On Singularity of Spline Space Over Morgan-Scott's Type Partition

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Journal of Mathematical Research and Exposition 2010年第1期30卷 1-16页

作者： Zhong xuan luo Feng Shah LIU Xi Quart SHI School of Mathematical Sciences Dalian University of Technology Liaoning 116024 P. R. China Applied Mathematics Research Center Delaware State University Dover 19901 U. S. A

Multivariate spline function is an important research object and tool in Computational Geometry. The singularity of multivariate spline spaces is a difficult problem that is ineritable in the research of the structure of multivariate spline spaces. The aim of this paper is to reveal the geometric significance of the singularity of bivariate spline space over Morgan-Scott type triangulation by using some new concepts proposed by the first author such as characteristic ratio, characteristic mapping of lines （or ponits）, and characteristic number of algebraic curve. With these concepts and the relevant results, a polished necessary and sufficient conditions for the singularity of spline space S u＋1^u （△MS^u） are geometrically given for any smoothness u by recursion. Moreover, the famous Pascal＇s theorem is generalized to algebraic plane curves of degree n≥3.

关键词： singularity of spline space Morgan-Scott's partition planar algebraic curve characteristic ratio characteristic mapping characteristic number.

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一种基于SDN的改进路由算法的研究

信息技术 2024年第2期48卷 89-93,98页

作者：赵晶晶孟文孟祥印罗玄胡佳荣西南交通大学机械工程学院成都610031

针对传统互联网调度无法满足工业业务QoS(Quality of Service)需求的问题,文中在基于SDN的新型网络架构上提出了一种改进的路由算法,并对其中使用的Floodlight控制器模块进行扩展与修改。根据信息收集单元模块提供的带宽信息与链路发现... 详细信息

针对传统互联网调度无法满足工业业务QoS(Quality of Service)需求的问题,文中在基于SDN的新型网络架构上提出了一种改进的路由算法,并对其中使用的Floodlight控制器模块进行扩展与修改。根据信息收集单元模块提供的带宽信息与链路发现模块提供的网络拓扑信息,路由计算模块对进入的数据流计算出更优化的最短路径。仿真实验结果表明,改进后的路由算法有效降低了数据的传输时延,增强了网络的稳定性。

关键词：软件定义网络路由算法 QoS

Foreignization and Domestication in Proverb Translation

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科技信息 2012年第14期 145-146页

作者： luo xuan School of Foreign Language Honghe University

Proverbs are culture-loaded linguistic *** E-C/C-E proverb translation involves not only the transfer of language but also the transmission of *** analyzing the necessity of employing foreigniztion instead of domestication in proverb translation,the author holds that foreignization should be mainly employed so as to achieve better conveyance of the cultural peculiarities of both English and Chinese proverbs and wherever necessary domestication should be employed in order to facilitate natural and fluent expression,but domestication should not distort the cultural flavor of the original.

关键词：谚语语言符号文化内涵英语