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Advanced oxidation via the synergy of C-defective/C-O band modified ultrathin porous g-C3N4 and PMS for efficient photothermal degradation of bisphenol pollutants and lignin derivatives

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Green Energy & Environment 2024年第7期9卷 1159-1170页

作者： Liquan Jing Meng Xie Yuanguo Xu chun tong Xia Du Heng Zhao Na Zhong Huaming Li Jinguang Hu School of Chemistry and Chemical Engineering Jiangsu University Department of Chemical and Petroleum Engineering University of Calgary School of Pharmacy Jiangsu University School of Material Science & Chemical Engineering Harbin University of Science and Technology Institute for Energy Research Jiangsu University

This work uses thermal polymerization of urea nitrate, oxyacetic acid and urea as the raw material to prepare ultra-thin porous carbon nitride with carbon defects and C-O band（OA-UN-CN）. Density functional theory（DFT） calculations showed OA-UN-CN had narrower band gap,faster electron transport and a new internal construction electric field. Additionally, the prepared OA-UN-CN significantly enhanced photocatalytic activation of peroxymonosulfate（PMS） due to enhanced light absorption performance and faster electron overflow. As the result, the OA-UN-CN/PMS could entirely degrade bisphenol A（BPA） within 30 min, where the photodegradation rate was 81.8 and 7.9 times higher than that of g-C3N4and OA-UN-CN, respectively. Beyond, the OA-UN-CN/PMS could likewise degrade other bisphenol pollutants and sodium lignosulfonate efficiently. We suggested possible photocatalytic degradation pathways accordingly and explored the toxicity of its degradation products. This work provides a new idea on the development of advanced photocatalytic oxidation processes for the treatment of bisphenol pollutants and lignin derivatives, via a metal-free photothermal-catalyst.

关键词： Photothermal-catalytic G-C 3 N 4 Peroxymonosulfate Bisphenol Sodium lignosulfonate

Genomics-driven derivatization of the bioactive fungal sesterterpenoid variecolin:Creation of an unnatural analogue with improved anticancer properties

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Acta Pharmaceutica Sinica B 2024年第1期14卷 421-432页

作者： Dexiu Yan Jemma Arakelyan Teng Wan Ritvik Raina Tsz Ki Chan Dohyun Ahn Vladimir Kushnarev Tsz Kiu Cheung Ho Ching Chan Inseo Choi Pui Yi Ho Feijun Hu Yujeong Kim Hill Lam Lau Ying Lo Law Chi Seng Leung chun Yin tong Kai Kap Wong Wing Lam Yim Nikolay S.Karnaukhov Richard Y.C.Kong Maria V.Babak Yudai Matsuda Department of Chemistry City University of Hong KongHong Kong SARChina iGEM Team“VarieCure” City University of Hong KongHong Kong SARChina Department of Biomedical Engineering City University of Hong KongHong Kong SARChina Moscow Clinical Research Center Named After A.S.Loginov Moscow 111123Russian Federation

A biosynthetic gene cluster for the bioactive fungal sesterterpenoids variecolin(1)and variecolactone(2)was identified in Aspergillus aculeatus ATCC *** production of 1 and 2 was achieved in Aspergillus oryzae by expressing the sesterterpene synthase VrcA and the cytochrome P450 ***,the replacement of VrcB with homologous P450s from other fungal terpenoid pathways yielded three new variecolin analogues(5-7).Analysis of the compounds’anticancer activity in vitro and in vivo revealed that although 5 and 1 had comparable activities,5 was associated with significantly reduced toxic side effects in cancer-bearing mice,indicating its potentially broader therapeutic *** study describes the first tests of variecolin and its analogues in animals and demonstrates the utility of synthetic biology for creating molecules with improved biological activities.

关键词： Animal studies Anticancer properties Biosynthesis Natural products Sesterterpenoids Synthetic biology Terpene synthases Variecolin

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降雨条件下层状土坡三维边坡稳定性分析

地基处理 2024年第3期6卷 223-234页

作者：韩同春吴俊扬浙江大学建筑工程学院浙江杭州310058 浙江大学滨海和城市岩土工程研究中心浙江杭州310058

降雨是诱发滑坡的重要因素之一,在降雨型滑坡的研究中,关于土壤水分剖面形状动态变化对三维边坡稳定性的影响有待进一步考虑。鉴于此,在前人工作的基础上,本文采用含修正形状系数的形状曲线描述土壤水分剖面的变化,结合非饱和土的水力特... 详细信息

降雨是诱发滑坡的重要因素之一,在降雨型滑坡的研究中,关于土壤水分剖面形状动态变化对三维边坡稳定性的影响有待进一步考虑。鉴于此,在前人工作的基础上,本文采用含修正形状系数的形状曲线描述土壤水分剖面的变化,结合非饱和土的水力特性,计算等效渗透系数,推导出改进入渗模型并拓展至双层土体入渗。利用GRASS GIS建立三维边坡模型,选取椭球面作为三维滑动面,通过蒙特卡洛法模拟椭球面参数,确定试算滑动面,采用Hovland三维极限平衡法计算考虑雨水入渗影响的三维边坡安全系数。根据湿润锋面、土层间界面和潜在滑动面三者的相对位置关系,将栅格单元柱分为5种情况考虑。通过算例分析验证所提出的降雨条件下三维边坡稳定性分析方法的可行性,结果表明:蒙特卡洛模拟试算样本数的最佳取值可定为2500次;最小三维边坡安全系数随着降雨历时的增加而减小,减小幅度为0.055~0.126。

关键词：降雨入渗土壤水分剖面边坡稳定性分析地理信息系统极限平衡法潜在滑动面

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东乡族《米拉尕黑》史诗的吟诵民俗探析

内蒙古社会科学（蒙文版） 2024年第4期44卷 144-151页

作者：佟春香孟开西北民族大学中国语言文学学部兰州730030 中国《江格尔》研究会兰州730030

《米粒尕黑》作为东乡民族本土文化的杰出代表,是一部饱含神秘色彩的英雄史诗。在历史的长河中,这部史诗经由无数代富有创造力的民间艺人深情吟诵,不仅承载并传递了东乡族人民的集体记忆与智慧,还以其独特的艺术魅力征服了无数听众的心... 详细信息

《米粒尕黑》作为东乡民族本土文化的杰出代表,是一部饱含神秘色彩的英雄史诗。在历史的长河中,这部史诗经由无数代富有创造力的民间艺人深情吟诵,不仅承载并传递了东乡族人民的集体记忆与智慧,还以其独特的艺术魅力征服了无数听众的心。在漫长的历史文化传承之旅中,史诗的吟诵成为展现民族智慧与艺术才华的舞台。吟诵《米粒尕黑》不仅仅是一项庄严神圣的民俗活动,更是东乡族人民信仰与情感的深刻表达。它伴随着特定的仪式氛围、严格的规则以及深远的文化寓意,成为传统与现代的纽带。这一传统中蕴含着丰富的规矩与禁忌,如避免在公众场合随意吟诵以维护史诗的神圣性,以及反对割裂吟诵内容以保持史诗的完整性与连贯性。这些规矩体现了东乡族人民对民族历史文化的尊重与珍视,同时也强调了对英雄人物的颂扬、礼节的恪守、圣人的崇拜、教化的传承以及民族团结和谐的追求。在音律曲调方面,《米粒尕黑》以其情感伤与悲情交织的自发性旋律,深刻展现了吟唱者内心世界的真挚与丰富。这些民俗特色的精妙融合,不仅塑造了东乡族独特的历史文化与生活习俗,还为《米粒尕黑》这部史诗赋予了高度的艺术价值,它使得《米粒尕黑》不仅成为一部具有深厚文化底蕴的文学作品,更为非物质文化遗产的传承与发展注入了不竭的生命力与创造力。

关键词：东乡族《米拉尕黑》吟诵民俗

Relationship of Uncertainty Between Polygon Segment and Line Segment for Spatial Data in GIS

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Geo-Spatial Information Science 2005年第3期8卷 183-188页

作者： LIU chun tong Xiaohua Department of Surveying and Geo-Informatics Tongji University 1239 Siping Road Shanghai 200092 China

The mathematic theory for uncertainty model of line segment are summed up to achieve a general conception, and the line error hand model of εσ is a basic uncertainty model that can depict the line accuracy and quality efficiently while the model of εm and error entropy can be regarded as the supplement of it. The error band model will reflect and describe the influence of line uncertainty on polygon uncertainty. Therefore, the statistical characteristic of the line error is studied deeply by analyzing the probability that the line error falls into a certain range. Moreover, the theory accordance is achieved in the selecting the error buffer for line feature and the error indicator. The relationship of the accuracy of area for a polygon with the error loop for a polygon boundary is deduced and computed.

关键词： spatial datas error bands polygon segments uncertainty

Twin pregnancy with sudden heart failure and pulmonary hypertension after atrial septal defect repair: A case report

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World Journal of Clinical Cases 2023年第35期11卷 8350-8356页

作者： chun-Xiao tong Tao Meng Department of Obstetrical First Affiliated Hospital of China Medical UniversityShenyang 110000Liaoning ProvinceChina

BACKGROUND Pulmonary arterial hypertension(PAH)in pregnancy is one of the major obstetric complications and is considered a contraindication to pregnancy as it is classified as a class IV risk in the revised risk classification of pregnancy by the World Health ***,with its adaptive and expectant mechanical and hormonal changes,negatively affects the cardiopulmonary circulation in pregnant *** patients with repaired simple congenital heart disease(CHD)develop other pulmonary and cardiac complications during pregnancy?Can pregnant women with sudden pulmonary hypertension be treated and managed in time?In this paper,we present a case of a 39-year-old woman who underwent cesarean section at 33 wk'gestation and developed PAH secondary to repaired simple *** research began by a PubMed search for"pulmonary hypertension"and"pregnancy"and"CHD"case *** cases were selected to review PAH in pregnancy after correction of CHD *** studies were reviewed,coupled with our own clinical *** SUMMARY Herein,a case involving a woman who underwent atrial septal defect repair at the age of 34,became pregnant five years later,and had a sudden onset of PAH and right heart failure secondary to symptoms of acute peripheral edema in the third trimester of her *** a result,the patient underwent a cesarean section and gave birth to healthy *** three days after cesarean delivery,her cardiac function deteriorated as the pulmonary artery pressure ***-tive postpartum management,including diuresis,significant oxygen uptake,vasodilators,capacity and anticoagulants management,led to improvements in cardiac function and *** patient was discharged from hospital with a stable recovery and transferred to local hospitals for further PAH *** This case served as a reminder to obstetricians of the importance of pregnancy after repair of *** is crucial for patients with CHD to receive early co

关键词： Congenital heart defects Pulmonary hypertension Right heart failure Twin pregnancy Perioperative management Case report

Fabrication of Superhydrophobic Aluminum Plate by Surface Etching and Fluorosilane Modification

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Chemical Research in Chinese Universities 2012年第5期28卷 903-906页

作者： YIN Shi-heng ZHU Bin LIU Yun-chun YANG Ji KUANG tong-chun Analytical&Testing Center South China University of TechnologyGuangzhou 510640P.R.China College of Materials Science and Engineering South China University of TechnologyGuangzhou 510640P.R.China

Superhydrophobic aluminum surfaces with a high water contact angle and low sliding angle on aluminum plate substrate were fabricated by means of surface etching with sodium hydroxide under ultrasonic bathing and then modification with fluorosilane. Scanning electron microscopy（SEM） showed a honeycomb-like structure on aluminum substrate surface after etching under ultrasonic bathing. And the surface was rendered from superhydrophilicity to superhydrophobicity after further modification with fluorosilane.

关键词： Superhydrophobicity Aluminum Surface etching Fluorosilane

Tensile reliability analysis for gravity dam foundation surface based on FEM and response surface method

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Water Science and Engineering 2010年第2期3卷 233-240页

作者： tong-chun LI Dan-dan LI Zhi-qiang WANG College of Water Conservancy and Hydropower Engineering Hohai University Nanjing 210098 P. R. China

In this study, the limit state equation for tensile reliability analysis of the foundation surface of a gravity dam was established. The possible crack length was set as the action effect and allowable crack length was set as the resistance in the limit state. The nonlinear FEM was used to obtain the crack length of the foundation surface of the gravity dam, and the linear response surface method based on the orthogonal test design method was used to calculate the reliability, providing a reasonable and simple method for calculating the reliability of the serviceability limit state. The Longtan RCC gravity dam was chosen as an example. An orthogonal test, including eleven factors and two levels, was conducted, and the tensile reliability was calculated. The analysis shows that this method is reasonable.

关键词： tensile reliability foundation surface of gravity dam nonlinear FEM," response surface method," Longtan RCC gravity dam

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交流励磁混合励磁电机的调磁稳压控制策略

电力设备管理 2024年第13期 276-278页

作者：卡功名仝春沈齐赵志成国电南瑞科技股份有限公司鞍山钢铁股份有限公司

交流励磁混合励磁电机是一种特殊类型电机,其结合了交流励磁和混合励磁两种励磁技术,以实现更好的性能和控制灵活性。本文首先构建电机数学模型,其次推导基于励磁绕组磁场定向控制时输出电压与励磁绕组电流之间的关系,最后总结稳压原理... 详细信息

交流励磁混合励磁电机是一种特殊类型电机,其结合了交流励磁和混合励磁两种励磁技术,以实现更好的性能和控制灵活性。本文首先构建电机数学模型,其次推导基于励磁绕组磁场定向控制时输出电压与励磁绕组电流之间的关系,最后总结稳压原理,从而提出更为科学的控制策略。并通过试验验证提出策略的有效性和实用性,结果证明,提出的稳压策略和构建的数学模型具备应用价值,可以有效提高电机性能,降低能耗。

关键词：混合励磁电机交流励磁磁场定向控制调磁稳压控制策略