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Effect of calcium ions on CO_2 corrosion of 3Cr low-alloy steel

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Acta Metallurgica Sinica(English Letters) 2011年第5期24卷 373-380页

作者： Zhijun JIA Cuiwei DU Zhiyong liU jin gao Xiaogang li Corrosion and Protection Center University of Science and Technology Beijing Beijing 100083 China

The effect of calcium ions on the corrosion behavior of 3Cr low-alloy steel in CO2- containing sodium chloride solution was investigated by immersion test and electrochemical measurements. It is found that with the addition of Ca2＋ to CO2-containing solution, the crazing level of the corrosion scale on the specimen is much slighter than that of the specimen immersed in solution without Ca2＋. The pitting on the surface of the specimens immersed in the solution with Ca2＋ is relatively small and distributes uniformly all over the surface. The significant change in the anodic polarization curve is attributed to the deposition of the CaCO3. CaCO3 deposits on the specimen surface and gives a protection to the metal substrate. And with the anodic proceeding, the concentration of H＋ in the solution increases. The CaCO3 deposition dissolves in the low pH solution and the protection effect disappears.

关键词： Steel Corrosion Corrosion scale Polarization EIS SEM

HPLC法测定香苏正胃丸中柚皮苷、橙皮苷和新橙皮苷的含量

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广州化工 2024年第11期52卷 56-58页

作者：高立金张琳卢彩会廊坊市药品检验所河北廊坊065000

建立HPLC法测定香苏正胃丸中柚皮苷、橙皮苷和新橙皮苷三种化学成分的含量。采用70%甲醇溶液提取制备供试品溶液,采用HPLC法,以Eclipse Plus C18色谱柱,规格250 mm×4.6 mm,5μm,以乙腈-水(22∶78)为流动相,流速1.0 mL/min,柱温35℃,检... 详细信息

建立HPLC法测定香苏正胃丸中柚皮苷、橙皮苷和新橙皮苷三种化学成分的含量。采用70%甲醇溶液提取制备供试品溶液,采用HPLC法,以Eclipse Plus C18色谱柱,规格250 mm×4.6 mm,5μm,以乙腈-水(22∶78)为流动相,流速1.0 mL/min,柱温35℃,检测波长283 nm。该系统能使三种化学成分达到基线分离,在各自范围内线性关系良好(r≥0.9999),三成分的平均回收率为98.3%~99.8%,RSD为0.60%~1.40%。该方法准确、重复性好、操作简单,可用于香苏正胃丸的质量控制。

关键词：香苏正胃丸柚皮苷橙皮苷新橙皮苷 HPLC

基于皮肤屏障功能、氧化应激指标评估疏肝消斑汤联合YAG激光治疗黄褐斑的临床效果

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中国医疗美容 2024年第1期14卷 47-50页

作者：张作军周树明高金丽信阳职业技术学院附属医院皮肤性病科河南信阳464000 河南中医药大学第一附属医院泌尿外科河南郑州450000 信阳市中心医院整形外科河南信阳464000

目的分析基于皮肤屏障功能、氧化应激指标评估疏肝消斑汤联合YAG激光治疗黄褐斑的可行性。方法选取108例信阳职业技术学院附属医院收治的黄褐斑患者,选例时间:2021年8月至2023年3月,分为对照组(54例)和研究组(54例),分为对照组和研究组... 详细信息

目的分析基于皮肤屏障功能、氧化应激指标评估疏肝消斑汤联合YAG激光治疗黄褐斑的可行性。方法选取108例信阳职业技术学院附属医院收治的黄褐斑患者,选例时间:2021年8月至2023年3月,分为对照组(54例)和研究组(54例),分为对照组和研究组,对照组接受YAG激光治疗,研究组接受疏肝消斑汤联合YAG激光治疗,两组均连续治疗20周。比较两组治疗后临床疗效,治疗前后皮损情况及皮肤屏障功能、血清超氧化物歧化酶(SOD)、丙二醛(MDA)、脂质过氧化物(LPO)水平、皮肤病生存质量指数(DLQI)、抑郁自评量表(SDS)、焦虑自评量表(SAS)和肝郁气滞证评分情况。结果研究组临床总有效率较高(两组治疗后相比);两组皮损面积、皮损颜色积分、皮损区经表皮水分流失值、黑色素含量、DLQI、SDS、SAS、肝郁气滞证评分、血清MDA、LPO水平均降低(治疗后相较于治疗前),且研究组处于较低水平(组间进行对比);两组角质层含水量、血清SOD水平均升高(治疗后相较于治疗前),且研究组处于较高水平(组间进行对比),P<0.05。结论黄褐斑患者应用疏肝消斑汤联合YAG激光治疗,可有助于改善皮肤屏障功能、心理状态,缓解临床症状,抑制氧化应激反应,提升生活质量,且临床疗效显著。

关键词：黄褐斑疏肝消斑汤激光皮肤屏障功能氧化应激

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ICP-MS法测定香苏正胃丸中朱砂的含量

中南药学 2024年第7期22卷 1883-1885页

作者：高立金李杰张琳卢彩会仇晓晴廊坊市药品检验所河北廊坊065000

目的建立香苏正胃丸中毒性成分朱砂的含量测定方法。方法香苏正胃丸样品用盐酸-硝酸(3∶1)5 mL超声,使朱砂反应生成可溶性汞盐,用水和2%硝酸稀释,加入金储备液,使含汞和金比例为1∶200,用ICP-MS法对朱砂中的汞进行含量测定。结果汞的质... 详细信息

目的建立香苏正胃丸中毒性成分朱砂的含量测定方法。方法香苏正胃丸样品用盐酸-硝酸(3∶1)5 mL超声,使朱砂反应生成可溶性汞盐,用水和2%硝酸稀释,加入金储备液,使含汞和金比例为1∶200,用ICP-MS法对朱砂中的汞进行含量测定。结果汞的质量浓度在0~15 ng·mL^(-1)内与信号强度呈良好的线性关系,回归方程Y=2614X+317,相关系数(r)0.9999,平均回收率为97.6%,RSD为1.7%,3批次样品每丸含朱砂(以硫化汞计)在5.76~5.85 mg内。结论建立的方法简便可靠、准确性高、专属性强,可用于香苏正胃丸质量控制。

关键词： ICP-MS法香苏正胃丸毒性成分朱砂

Unveiling the size effect of nitrogen-doped carbon-supported copper-based catalysts on nitrate-to-ammonia electroreduction

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Nano Research 2024年第4期17卷 2438-2443页

作者： Ran li Taotao gao Wenxi Qiu Minghao Xie Zhaoyu jin Panpan li College of Materials Science and Engineering Sichuan UniversityChengdu 610065China Institute for Advanced Study Chengdu UniversityChengdu 610106China Materials Science and Engineering Program and Walker Department of Mechanical Engineering The University of Texas at AustinAustinTexas 78712USA Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China

The electrocatalytic nitrate reduction reaction(NitRR)represents a promising approach toward achieving economically and environmentally sustainable ***,it remains a challenge to regulate the size effect of electrocatalysts to optimize the catalytic activity and ammonia ***,the Cu-based catalysts were tailored at the atomic level to exhibit a size gradient ranging from single-atom catalysts(SACs,0.15–0.35 nm)to single-cluster catalysts(SCCs,1.0–2.8 nm)and nanoparticles(NPs,20–30 nm),with the aim of studying the size effect for the NO_(3)^(-)-to-NH_(3) reduction ***,the Cu SCCs exhibit enhanced metal–substrate and metal–metal interactions by taking advantageous features of Cu SACs and Cu ***,Cu SCCs achieve exceptional electrocatalytic performance for the NitRR with a maximum Faradaic efficiency of ca.96%NH_(3)and the largest yield rate of ca.1.99 mg·h^(-1)·cm^(-2) at-0.5 V *** hydrogen electrode(RHE).The theoretical calculation further reveals the size effect and coordination environment on the high catalytic activity and selectivity for the *** work provides a promising various size-controlled design strategy for aerogel-based catalysts effectively applied in various electrocatalytic reactions.

关键词： nitrate electroreduction ammonia electrosynthesis size effect single-cluster catalyst

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UPLC法测定香苏正胃丸中6种成分的含量

广州化工 2024年第15期52卷 80-82页

作者：高立金卢彩会张琳陈佳佩廊坊市药品检验所河北廊坊065000 廊坊卫生职业学院药学系河北廊坊065000

建立UPLC法测定香苏正胃丸中柚皮苷、橙皮苷、新橙皮苷、迷迭香酸、和厚朴酚与厚朴酚6个成分的含量。以SHIMADZU Shim-pack GISI C_(18)为色谱柱,规格100 mm×2.1 mm,粒径2μm,以乙腈为流动相A,0.1%磷酸溶液为流动相B,以线性方式调节流... 详细信息

建立UPLC法测定香苏正胃丸中柚皮苷、橙皮苷、新橙皮苷、迷迭香酸、和厚朴酚与厚朴酚6个成分的含量。以SHIMADZU Shim-pack GISI C_(18)为色谱柱,规格100 mm×2.1 mm,粒径2μm,以乙腈为流动相A,0.1%磷酸溶液为流动相B,以线性方式调节流动相比例进行梯度洗脱,流速0.3 mL/min,柱温30℃,检测波长294 nm。该系统能使柚皮苷、橙皮苷、新橙皮苷、迷迭香酸、和厚朴酚与厚朴酚在各自的测定范围内线性关系良好,相关系数(r)均大于0.999,平均加样回收率在97.61%~99.82%,RSD在1.13%~2.56%。所建立的测定方法简便、准确、灵敏、重复性较好,可用于香苏正胃丸的质量控制。

关键词：香苏正胃丸 UPLC 化学成分

Enhanced photocatalytic hydrogen production from Co-MOF/CN by nitrogen and sulfur co-doped coal-based carbon quantum dots

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Journal of Rare Earths 2024年第5期42卷 838-850,I0002页

作者： Shiyong Xu Mei li Yijun Wang Caiyun gao Rongsheng Xu Zhiliang jin School of Chemistry and Chemical Engineering North Minzu UniversityYinchuan750021China Ningxia Key Laboratory of Solar Chemical Conversion Technology.North Minzu University.Yinchuan 750021China State Key Laboratory of National Ethnic Affairs Commission Chemical Technology.North Minzu University Yinchuan750021China

A novel composite photocatalyst for photocatalytic decomposition of water for hydrogen evolution was successfully synthesized by in-situ growth of nitrogen and sulfur co-doped coal-based carbon quantum dots(NSCQDs)nanoparticles on the surface of sheet cobalt-based metal-organic framework(Co-MOF)and graphitic carbon nitride(g-C_(3)N_(4),CN).The structure and properties of the obtained catalysts were systematically *** effectively broaden the absorption of Co-MOF and CN in the visible *** new composite photocatalyst has high hydrogen production activity and the hydrogen production rate reaches 6254μmol/(g·h)at pH=*** the same time,NSCQDs synergy Co-MOF/CN composites have good *** four cycles of hydrogen production,the performance remains relatively *** tran sient photocurrent response and Nyquist plot experimental results further demonstrate the improvement of carrier separation efficiency in composite *** semiconductor type(n-type semico nductor)of the single-phase catalyst was determined by the Mott-Schottky test,and the band structure was *** conductive and valence bands of CN are-0.99 and 1.72 eV,respectively,and the conduction and valence bands of Co-MOF are-1.85 and 1.33 eV,*** e mechanism of the photocatalytic reaction can be inferred,that is,Z-type heterojunction is formed between CN an d Co-MOF,and NSCQDs was used as cocatalyst.

关键词： Nitrogen and sulfur co-doped Coal-based carbon quantum dots Co-MOF CN Photocatalytic hydrogen evolution Rare earths

Car-following strategy of intelligent connected vehicle using extended disturbance observer adjusted by reinforcement learning

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CAAI Transactions on Intelligence Technology 2024年第2期9卷 365-373页

作者： Ruidong Yan Penghui li Hongbo gao jin Huang Chengbo Wang School of Traffic and Transportation The Beijing Jiaotong UniversityBeijingChina Department of Automation School of Information Science and TechnologyUniversity of Science and Technology of ChinaHefeiChina School of Vehicle and Mobility The Tsinghua UniversityBeijingChina liverpool Logistics Offshore and Marine Research Institute(LOOM)Liverpool John Moores UniversityLiverpoolUK

Disturbance observer-based control method has achieved good results in the carfollowing scenario of intelligent and connected vehicle(ICV).However,the gain of conventional extended disturbance observer(EDO)-based control method is usually set manually rather than adjusted adaptively according to real time traffic conditions,thus declining the car-following *** solve this problem,a car-following strategy of ICV using EDO adjusted by reinforcement learning is *** from the conventional method,the gain of proposed strategy can be adjusted by reinforcement learning to improve its estimation *** the“equivalent disturbance”can be compensated by EDO to a great extent,the disturbance rejection ability of the carfollowing method will be improved *** Lyapunov approach and numerical simulations are carried out to verify the effectiveness of the proposed method.

关键词： adaptive system autonomous vehicle intelligent control

A survey on dynamic graph processing on GPUs: concepts, terminologies and systems

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Frontiers of Computer Science 2024年第4期18卷 1-23页

作者： Hongru gao Xiaofei liAO Zhiyuan SHAO Kexin li Jiajie CHEN Hai jin National Engineering Research Center for Big Data Technology and System/Services Computing Technology and System Lab/Cluster and Grid Computing Lab School of Computer Science and TechnologyHuazhong University of Science and TechnologyWuhan 430074China Zhejiang Lab Hangzhou 311121China

Graphs that are used to model real-world entities with vertices and relationships among entities with edges,have proven to be a powerful tool for describing real-world problems in *** most real-world scenarios,entities and their relationships are subject to constant *** that record such changes are called dynamic *** recent years,the widespread application scenarios of dynamic graphs have stimulated extensive research on dynamic graph processing systems that continuously ingest graph updates and produce up-to-date graph analytics *** the scale of dynamic graphs becomes larger,higher performance requirements are demanded to dynamic graph processing *** the massive parallel processing power and high memory bandwidth,GPUs become mainstream vehicles to accelerate dynamic graph processing ***-based dynamic graph processing systems mainly address two challenges:maintaining the graph data when updates occur(i.e.,graph updating)and producing analytics results in time(i.e.,graph computing).In this paper,we survey GPU-based dynamic graph processing systems and review their methods on addressing both graph updating and graph *** comprehensively discuss existing dynamic graph processing systems on GPUs,we first introduce the terminologies of dynamic graph processing and then develop a taxonomy to describe the methods employed for graph updating and graph *** addition,we discuss the challenges and future research directions of dynamic graph processing on GPUs.

关键词： dynamic graphs graph processing graph algorithms GPUs