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Effects of heterogeneous reaction with NO_(2) on ice nucleation activities of feldspar and Arizona Test Dust

Journal of Environmental Sciences 2023年第5期127卷 210-221页

作者： Lanxiadi Chen chao peng Jingchuan Chen Jie Chen Wenjun Gu Xiaohong Jia Zhijun Wu Qiyuan Wang Mingjin Tang State Key Laboratory of Organic Geochemistry Guangdong Key Laboratory of Environmental Protection and Resources UtilizationGuangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and ControlGuangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China CAS Center for Excellence in Deep Earth Science Guangzhou 510640China University of Chinese Academy of Sciences Beijing 100049China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Key Laboratory of Aerosol Chemistry and Physics State Key Laboratory of Loess and Quaternary GeologyInstitute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China

Mineral dust is an important type of ice nucleating particles in the troposphere;however,the effects of heterogeneous reactions on ice nucleation(IN)activities of mineral dust remain to be elucidated.A droplet-freezing apparatus(Guangzhou Institute of Geochemistry Ice Nucleation Apparatus,GIGINA)was developed in thiswork to measure IN activities of atmospheric particles in the immersion freezingmode,and its performancewas validated by a series of experimental *** apparatus was then employed to measure IN activities of feldspar and Arizona Test Dust(ATD)particles before and after heterogeneous reaction with NO_(2)(10±0.5 ppmv)at 40%relative *** surface coverage of nitrate,θ(NO_(3)^(−)),increased to 3.1±0.2 for feldspar after reaction with NO_(2) for 6 hr,and meanwhile the active site density per unit surface area(ns)at-20℃ was reduced from 92±5 to<1.0 cm^(−2) by about two orders of magnitude;however,no changes in nitrate content or IN activities were observed for further increase in reaction time(up to 24 hr).Both nitrate content and IN activities changed continuously with reaction time(up to 24 hr)for ATD particles;after reaction with NO_(2) for 24 hr,θ(NO_(3)^(−))increased to 1.4±0.1 and ns at-20℃ was reduced from 20±4 to 9.7±1.9 cm^(−2) by a factor of∼*** work suggests that heterogeneous reaction with NO_(2),an abundant reactive nitrogen species in the troposphere,may significantly reduce IN activities of mineral dust in the immersion freezing mode.

关键词： Ice nucleation Mineral dust Heterogeneous reaction Nitrogen oxides Aerosol-cloud interaction

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Influence of zinc on electrochemical discharge activity of Mg-6%Al-5%Pb anode

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Journal of Central South University 2012年第1期19卷 9-16页

作者： WANG Nai-guang WANG Ri-chu peng chao-qun FENG Yan Science and Engineering Central South UniversityChangsha 410083China

Mg-6%Al-5%Pb(mass fraction) anodes with different contents of zinc were prepared by melting and *** electrochemical discharge behavior of these anodes in 3.5% NaCl solutions was investigated by galvanostatic test and electrochemical impedance spectroscopy(EIS).The microstructures and the corroded surfaces of these anodes were studied by scanning electron microscopy(SEM) and emission spectrum analysis(ESA).The phase structures and the corrosion products of the anodes were analyzed by X-ray diffraction(XRD).The results show that zinc promotes the grain refinement of Mg-6%Al-5%Pb anode and makes the average discharge potential of Mg-6%Al-5%Pb anode more negative during galvanostatic ***-6%Al-5%Pb anode with the addition of 1%(mass fraction) zinc has the best electrochemical *** activation mechanism of zinc to Mg-6%Al-5%Pb anode is as follows:The hydrolyzation of dissolved Zn2+ ions reduces the pH value of the solution near the surface of the anode and accelerates the dissolution of Mg(OH)2 film;The precipitated Zn(OH)2 with similar structure as Mg(OH)2 combines with Mg(OH)2 film easily and makes it break down.

关键词： magnesium anode alloying electrochemistry electrochemical discharge activity

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The therapeutic effect of pelvic floor muscle exercise on urinary incontinence after radical prostatectomy:a meta-analysis

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Asian Journal of Andrology 2019年第2期21卷 170-176页

作者： Mei-Li-Yang Wu Cheng-Shuang Wang Qi Xiao chao-Hua peng Tie-Ying Zeng Department of Nursing Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China School of Nursing Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Pelvic floor muscle exercise(PFME)is the most common con servative manageme nt for urinary incon tine nee(Ul)after radical prostatectomy(RP).However,whether the PFME guided by a therapist(G-PFME)can contribute to the recovery of urinary continenee for patients after RP is still *** performed this meta-analysis to investigate the effectiveness of G-PFME on Ul after RP and to explore whether the additional preoperative G-PFME is superior to postoperative G-PFME *** search was con ducted on Cochra ne Library,Embase,Web of Scie nee,and PubMed,to obtai n all re leva nt randomized controlled trials published before March 1,*** data were pooled and an a lyzed with Review Man ager 5.3 to compare the conti nence rates of G-PFME with control and to compare additional preoperative G-PFME with postoperative ***-two articles with 2647 patients were *** conti nence rates of G?PFME were all superior to con trol at d iff ere nt follow-up time points,with the odds ratio(OR)(95%confidence interval[Cl])of 2.79(1.53-5.07),2.80(1.87-4.19),2.93(1.19-7.22),4.11(2.24-7.55),and 2.41(1.33-4.36)at 1 mon th,3 months,4 months,6 months,and 12 months after surgery,***,there was no difference between additional preoperative G-PFME and postoperative G-PFME,with the OR(95%Cl)of 1.70(0.56-5.11)and 1.35(0.41-4.40)at 1 month and 3 months after RP,respectively.G-PFME could improve the recovery of urinary continence at both early and Iong-term *** the PFME preoperatively might not produce extra benefits for patients at early stage,compared with postoperative PFME.

关键词： continence rate pelvic floor muscle exercise radical prostatectomy urinary incontinence

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Synthesis and characterization of asymmetric substituted dicarbamates

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Chinese Chemical Letters 2011年第10期22卷 1167-1170页

作者： chao Zhao peng Fei Yang Shun Ping Wang Jun Ying Li Tian Duo Li Shandong Provincial Key Laboratory of Fine Chemicals Shandong Polytechnic University Jinan 250353 China

Several new asymmetric substituted dicarbamates were synthesized with a convenient ***,tolylene-2,4-diisocyanate dimmer was obtained from monomer with tributylphosphine as ***,the dimmer reacted with alcohol（R^1OH） to prepare carbamate substituted ***,uretidione ring was opened and the released isocyanate reacted with another alcohol （R^2OH,R^1≠R^2）.

关键词： Asymmetric substituted dicarbamates Tolylene-2 4-diisocyanate Uretidione

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ERβ-activated LINC01018 promotes endometriosis development by regulating the CDC25C/CDK1/CyclinB1 pathway

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Journal of Genetics and Genomics 2024年第6期51卷 617-629页

作者： Ruihui Lu Jingwen Zhu Xin Li Cheng Zeng Yan Huang chao peng Yingfang Zhou Qing Xue Department of Obstetrics and Gynecology Peking University First HospitalBeijing 100034China

Endometriosis refers to as an estrogen-dependent *** receptorβ(ERB),the main estrogen receptor subtype which is encoded by the estrogen receptor 2(ESR2)gene,can mediate the action of estrogen in *** selective estrogen receptor modulators can target the ERβ,they are not specific due to the wide distribution of ERβ.Recently,long noncoding RNAs have been implicated in ***,we aim to explore and validate the downstream regulatory mechanism of ERβ,and to investigate the potential role of long intergenic noncoding RNA 1018(LINC01018)as a nonhormonal treatment for *** study demonstrates that the expression levels of ESR2 and LINCo1018 are increased in ectopic endometrial tissues and reveals a significant positive correlation between the ESR2 and LINCo1018 ***,ERβdirectly binds to an estrogen response element located in the LINCO1018 promoter region and activates LINC01018 ***,ERβcan regulate the CDC25C/CDK1/CyclinB1 pathway and promote ectopic endometrial stromal cell proliferation via LINC01018 in *** with these findings,the knockdown of LINC01018 inhibits endometriotic lesion proliferation in *** summary,our study demonstrates that the ERβ/LINC01018/CDC25C/CDK1/CyclinB1 signaling axis regulates endometriosis progression.

关键词： Estrogen receptorβ Long intergenic noncoding RNA 1018 (LINC01018) Endometriosis Cell cycle Proliferation

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多台LNG高压泵联动运行的优化与改进

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天然气工业 2019年第9期39卷 110-116页

作者：彭超中石油京唐液化天然气有限公司

随着我国LNG进口量的不断增加,国内部分大型LNG接收站已开始进行扩建以提高气化外输能力,如何保证新增设备尤其是高压泵的可靠运行以达到预期的效率和产能,便成为LNG接收站重要的研究课题。为此,基于中石油唐山LNG接收站二期工程投产成... 详细信息

随着我国LNG进口量的不断增加,国内部分大型LNG接收站已开始进行扩建以提高气化外输能力,如何保证新增设备尤其是高压泵的可靠运行以达到预期的效率和产能,便成为LNG接收站重要的研究课题。为此,基于中石油唐山LNG接收站二期工程投产成功运行4年的数据资料,梳理了多台高压泵并联运行出现的相关问题,并根据设计数据、管道布置和联锁保护逻辑,分析了上述问题产生的原因,明确了影响多台高压泵之间流量分配的主要因素,提出了相关操作方式和工艺流程的优化改进措施。研究结果表明:①入出口总管π形弯是导致部分高压泵出现抽液、排液困难的原因;②出口阀开度是影响流量分配骤然变化的重要因素;③高压输出总管LNG倒流是高压泵出口流量被抢占的直接原因;④高压泵泵井与再冷凝器气相空间连通是导致高压泵泵井液位波动的主要原因;⑤提出了优先启动高压输出总管远端高压泵、将高压泵出口阀开度控制在较高水平、投用泵井放空至储罐工艺流程以规避BOG堆积泵井风险、定期检查高压泵出口止回阀的工作状态等4点运行优化措施建议。结论认为,所提出的优化方法可行有效,保证了唐山LNG接收站4 200×10^4 m^3/d的最大气化能力,为LNG接收站扩建工程及新增接收站提供了借鉴。

关键词： LNG接收站唐山高压泵流量分配并联运行止回阀运转风险优化措施

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Design,fabrication,and cold test of an S-band high-gradient accelerating structure for compact proton therapy facility

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Nuclear Science and Techniques 2021年第4期32卷 38-48页

作者： Yu Zhang Wen-Cheng Fang Xiao-Xia Huang Jian-Hao Tan Cheng Wang chao-peng Wang Zhen-Tang Zhao Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China ShanghaiTech University Shanghai 201210China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201204China

An S-band high-gradient accelerating structure is designed for a proton therapy linear accelerator(linac)to accommodate the new development of compact,singleroom facilities and ultra-high dose rate(FLASH)*** optimize the design,an efficient optimization scheme is applied to improve the simulation *** S-band accelerating structure with 2856 MHz is designed with a low beta of 0.38,which is a difficult structure to achieve for a linac accelerating proton particles from 70 to 250 MeV,as a high gradient up to 50 MV/m is required.A special design involving a dual-feed coupler eliminates the dipole field *** paper presents all the details pertaining to the design,fabrication,and cold test results of the S-band high-gradient accelerating structure.

关键词： S-band High gradient Accelerating structure Compact Single-room facility Dual-feed coupler Cold test

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风力发电机组传动链调谐惯量阻尼器研究

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太阳能学报 2018年第7期39卷 2036-2043页

作者：彭超国电联合动力技术有限公司风电设备及控制技术国家重点实验室

借鉴调谐质量阻尼器的力学原理,提出风力发电机组传动链调谐惯量阻尼器（tuned inertia damper,TID）。通过结构、气动、控制多学科联合仿真,研究TID对传动链扭转方向的减振、降载效果。结果表明,TID可有效降低传动链扭转方向的疲劳载... 详细信息

借鉴调谐质量阻尼器的力学原理,提出风力发电机组传动链调谐惯量阻尼器（tuned inertia damper,TID）。通过结构、气动、控制多学科联合仿真,研究TID对传动链扭转方向的减振、降载效果。结果表明,TID可有效降低传动链扭转方向的疲劳载荷和极限载荷,且传动链低速轴侧比高速轴侧的降载幅度更大;同时有效抑制传动链扭转方向振动,改善发电机超速状况。TID在修复因疲劳、振动导致的传动链故障和老旧机组的寿命延长方面有一定的应用价值。

关键词：风力发电机组传动链阻尼器调谐惯量

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风力发电机组地震动力响应分析

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太阳能学报 2016年第12期37卷 3189-3194页

作者：彭超国电联合动力技术有限公司北京100039

建立风力发电机组机械-气动-控制多学科联合仿真模型,通过仿真研究地震作用下机组的动力响应。计算结果表明,停机动作对地震动力响应有显著影响。经对比分析,采用振型分解反应谱法和不考虑停机动作的多体动力学方法计算的地震载荷均偏... 详细信息

建立风力发电机组机械-气动-控制多学科联合仿真模型,通过仿真研究地震作用下机组的动力响应。计算结果表明,停机动作对地震动力响应有显著影响。经对比分析,采用振型分解反应谱法和不考虑停机动作的多体动力学方法计算的地震载荷均偏保守。

关键词：风力发电机组地震动力响应多体动力学联合仿真

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Colloidal Alumina-bonded TiB_2 Coating on Cathode Carbon Blocks in Aluminum Cells

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Rare Metals 2001年第2期20卷 101-106页

作者： Huimin Lu, Lanlan Yu, chao Wang, peng Sun (Department of Nonferrous Metallurgy, University of Science and Teclmology Beijing, Beijing 100083, China) Univ Sci & Technol Beijing Dept Nonferrous Met Beijing 100083 Peoples R China

Self-propagating high-temperature synthesis (SHS) with reduction process was used to fabricate TiB2 powder from TiO2-B2O3-Mg system. The colloidal alumina-bonded TiB2 paste was prepared and coated on the cathode carbon blocks. Various properties of the baked paste such as the corrosive resistance, thermal expansion and wettability were tested. Experimental results showed that the colloidal alumina-bonded TiB2 coating could be well wetted by liquid aluminum; and the thermal expansion coefficient of the coated material was 5.8x10(-6) degreesC(-1) at 20-1000 degreesC, which was close to that of the traditional anthracite block cathode (4x10(-6) degreesC(-1)); the electrical resistivity was 8 mu Omega (.)m at 900 degreesC when the content of alumina in the coated material was about 9% in mass fraction. In addition, some other good results such as sodium resistance were also reported.

关键词： self-propagating high-temperature synthesis reduction process colloidal alumina-bonded TiB2 coating carbon cathode aluminum reduction cell

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