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Security Constrained Unit Commitment with Extreme Wind Scenarios

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Journal of Modern Power Systems and Clean Energy 2020年第3期8卷 464-472页

作者： Xin Zhu Zongchao yu xuan Liu College of Electrical and Information Engineering Hunan UniversityChangsha 410082China

The rapid development of economy and society stimulates the increase of power demand. Wind power has received great attention as a typical renewable energy, and the share of wind power is continually increasing in recent ***, the high integration of wind power brings challenges to the secure and reliable operation of power grid due to the intermittent characteristic of wind power. In order to solve the operation risk caused by wind power uncertainty, this paper proposes to solve the problem of stochastic security-constrained unit commitment(SCUC) by considering the extreme scenarios of wind power output. Firstly, assuming that the probability density distribution of wind power approximately follows a normal distribution, a great number of scenarios are generated by Monte Carlo(MC) simulation method to capture the stochastic nature of wind power output. Then, the clustering by fast search and find of density peaks(CSFDP) is utilized to separate the generated scenarios into three types: extreme, normal and typical scenarios. The extreme scenarios are identified to determine the on/off statuses of generators, while the typical scenarios are used to solve the day-ahead security-constrained economic dispatch(SCED) problem. The advantage of the proposed method is to ensure the robustness of SCUC solution while reducing the conservativeness of the solution as much as *** effectiveness of the proposed method is verified by IEEE test systems.

关键词： Monte Carlo(MC)simulation security-constrained unit commitment(SCUC) security-constrained economic dispatch(SCED) wind power

Integrated Chinese and Western medicine in the treatment of a patient with podocyte infolding glomerulopathy:A case report

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World Journal of Clinical Cases 2023年第19期11卷 4684-4691页

作者： Mei-Ying Chang yu Zhang Ming-Xu Li fang xuan Department of Nephrology Xiyuan HospitalChina Academy of Chinese Medical SciencesBeijing 100091China Department of Nephrology First Medical Center of Chinese PLA General HospitalNephrology Institute of the Chinese People’s Liberation ArmyState Key Laboratory of Kidney DiseasesNational Clinical Research Center for Kidney DiseasesBeijing Key Laboratory of Kidney Disease ResearchBeijing 100853China

BACKGROUND Podocyte infolding glomerulopathy(PIG)is a newly described and rare glomerular *** date,only approximately 40 cases have been reported *** SUMMARY A 26-year-old female patient presented to our hospital with a complaint of intermittent edema of both lower limbs over the past 2 *** patient was diagnosed with *** was prescribed corticosteroid therapy in other hospitals during the initial stage,to which she had responded poorly and had developed femoral head ***,we administered immunosuppressants,reninangiotensin system inhibitors,combined with traditional Chinese *** patient was followed for 1 year,during which her clinical condition *** Integrated Chinese and Western medicine may be effective for PIG treatment,which requires active intervention to improve prognosis.

关键词： Corticosteroid therapy Immunosuppressive agents Podocyte-infolding glomerulopathy Renin-angiotensin system Traditional Chinese medicine Case report

Dealumination and desilication for Al-rich HZSM-5 zeolite via steam-alkaline treatment and its application in methanol aromatization

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Frontiers of Chemical Science and Engineering 2019年第3期13卷 543-553页

作者： yuehua fang Fan Yang xuan He Xuedong Zhu State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China

The hierarchical HZSM-5 was prepared via dealumination and desilication of commercial Al-rich HZSM-5, and characterized by X-ray diffraction, 27Al magic-angle spinning nuclear magnetic resonance, inductively coupled plasma mass spectrometry, scanning electron microscope, transmission electron microscope, N2 adsorption-desorption, NH3 temperature-programmed desorption, performed thermogravimetric and Raman spectrum. The results showed that partial framework of HZSM-5 was removed after steam treatment at 0.15 MPa, 500℃ for 3 h. HZSM-5 with high specific surface area and much mesoporosity was obtained by the subsequent alkaline treatment. The regulation of acid quantity was achieved by altering the concentration of alkaline. Dealumination and desilication of Al-rich HZSM-5 zeolites became more effective using a combination of steam and alkaline treatments than using alkaline treatment alone. Methanol aromatization reaction was employed to evaluate the catalytic performance of treated HZSM-5 at 0.15 MPa, 450℃ and MHSV of 1.5 h^-1. The results indicated that after steam treatment, HZSM-5 further treated with 0.2 mol/L NaOH exhibits the best catalytic performance: the selectivity of aromatics reached 42.1% and the lifetime of catalyst attained 212 h, which are much better than untreated HZSM-5.

关键词： steam treatment alkaline treatment,hierarchical ZSM-5 methanol aromatization

Mendelian Randomization Analysis to Analyze the Effect of Emergency Caesarean Section on Different Allergic Diseases and Related Blood Markers

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Biomedical and Environmental Sciences 2023年第11期36卷 1084-1089页

作者： LI yu Jian KAN xuan Department of Pediatrics General Hospital of Tianjin Medical UniversityTianjin 300052China

Caesarean section is a well-established surgical procedure that allows for maximum fetal rescue under special circumstances,such as intrauterine distress and intrauterine hypoxia,and minimizes injuries to pregnant women who cannot tolerate vaginal *** caesarean section is a special type of caesarean section that plays an important role in protecting the lives of pregnant mothers and fetuses[1].

关键词： Blood injuries Emergency

MC-ICP-MS 测定岩石标准物质的钒同位素组成

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岩矿测试 2025年第1期44卷 63-74页

作者：徐丽怡于慧敏丁昕黄方中国科学技术大学地球和空间科学学院岩石圈演化与环境演变全国重点实验室安徽合肥230026 中国科学院比较行星学卓越创新中心中国科学技术大学安徽合肥230026

随着分析方法的发展和分析精度的提升,钒同位素已经越来越多地被用于各种地质过程研究。为了确保钒同位素分析测试过程中,可以有效地监控数据的准确度和精度,方便国际各实验室之间的数据对比,同时考虑到早期国际上常用美国地质调查局(US... 详细信息

随着分析方法的发展和分析精度的提升,钒同位素已经越来越多地被用于各种地质过程研究。为了确保钒同位素分析测试过程中,可以有效地监控数据的准确度和精度,方便国际各实验室之间的数据对比,同时考虑到早期国际上常用美国地质调查局(USGS)的标准物质面临着库存不足等问题,本文采用多接收电感耦合等离子体质谱仪(MC-ICP-MS)测定了一系列国际地质标准物质和国家地质标准物质的钒同位素组成,δ51V值的测试精度优于0.08‰。本文选取的标准物质主要来自日本地质调查局(GSJ)和中国地质科学院地球物理地球化学勘查研究所(IGGE),包括一个安山岩(JA-1),三个玄武岩(JB-3、JB-1b和GBW07105),一个辉长岩(JGb-1),一个辉绿岩(GBW07123)以及一个土壤(GBW07454),钒含量范围为77~635μg/g,涵盖了目前大部分火成岩和部分土壤等天然样品含量的范围。这些标准物质除了土壤GBW07454,其他标准物质的钒同位素组成未曾被报道。经测量表明,辉长岩标准物质JGb-1具有最高δ51V值,为−1.05‰±0.08‰,安山岩标准物质JA-1具有最低δ51V值,为−0.34‰±0.06‰,其余标准物质的δ51V值变化范围为−0.72‰~−0.81‰,均落在MORB范围内。本文对这些标准物质钒同位素组成的报道,丰富了钒同位素研究的标准物质数据库,有助于未来在更多领域开展钒同位素研究。

关键词：钒同位素火成岩 MC-ICP-MS 标准物质高精度分析方法

Synthesis and characterization of HPMA copolymer-5-FU conjugates

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Chinese Chemical Letters 2008年第2期19卷 137-140页

作者： fang yuan Fu Chen Qing yu Xiang xuan Qin Zhi Rong Zhang yuan Huang Key Laboratory of Drug Targeting of Ministry of Education West China School of Pharmacy Sichuan University Chengdu 610041 China

N-（2-Hydroxypropyl） methacrylamide copolymer-5-fluorouracil （PHPMA-FU） conjugates were synthesized by a novel and simplified synthetic route, and characterized by UV, FTIR and HPLC analyses. The conjugated content of 5-fluorouracil （5-FU） was 3.41 ± 0.07 wt%. The stabilities of PHPMA-FU conjugates under different conditions were studied. The results showed that HPMA copolymer was a potential carrier for tumor-targeting delivery of 5-FU.

关键词： HPMA copolymer 5-Fluorouracil Conjugates Characterization Stability

An improved LuGre model for calculating static steering torque of rubber tracked chassis

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Defence Technology（防务技术） 2022年第5期18卷 797-810页

作者： Kang Liang Qun-zhang Tu Xin-min Shen Zhong-hang fang xuan Yang Yong Zhang Hui-yu Xiang College of Field Engineering Army Engineering University of PLANanjing210007China State Key Laboratory of Intelligent Manufacturing of Advanced Construction Machinery Xuzhou Construction Machinery GroupXuzhou221004China

Tire and rubber track interchangeable chassis combines the advantages of tire and rubber track,which can greatly improve the maneuverability of military construction ***,there is almost no effective calculation model for the real-time static steering *** the relative sliding speed is greater than 0.01 m/s,the influence of friction heating can not be *** improved LuGre model is established to calculate the static real-time steering torque of tire and rubber track interchangeable ***,the friction heating model between rubber and ground is *** with the influence of temperature on the dynamic performance of rubber material,the influence of friction heating on the stiffness and friction coefficient of rubber track is analyzed,and the improved LuGre friction model is *** steering torque of tire and rubber track interchangeable chassis is affected by rubber material properties,steering speed,pavement type,and ambient *** with the original Lu Gre model,the improved LuGre model captures the change in friction torque during multiple in-situ turns due to frictional *** error with the experimental data is small,which verifies the effectiveness of the improved LuGre model.

关键词： Rubber track Static steering torque Friction model Chassis Maneuverability Vehicle

Identifying candidate genes involved in trichome formation on carrot stems by transcriptome profiling and resequencing

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Journal of Integrative Agriculture 2022年第12期21卷 3589-3599页

作者： WU Zhe YANG xuan ZHAO yu-xuan JIA Li College of Horticulture Shanxi Agricultural UniversityTaigu 030801P.R.China Key Laboratory of Genetic Improvement and Ecophysiology of Horticultural Crop of Anhui Province Institute of HorticultureAnhui Academy of Agricultural SciencesHefei 230001P.R.China

Trichomes are specialized structures developed from epidermal cells and can protect plants against biotic and abiotic *** cover carrots during the generative ***,the morphology of the carrot trichomes and candidate genes controlling the formation of trichomes are still *** study found that carrot trichomes were nonglandular and unbranched hairs distributed on the stem,leaf,petiole,pedicel,and seed of *** analysis of a trichome mutant with sparse and short trichomes(sst)and a wild type(wt)with long and dense trichomes on carrot stems was conducted.A total of 15396 genes containing nonsynonymous mutations in sst were obtained,including 42 trichomerelated *** also analyzed the transcriptome of the trichomes on secondary branches when these secondary branches were 10 cm long between wt and sst and obtained 6576 differentially expressed genes(DEGs),including 24 trichome-related ***-PCR validation exhibited three significantly up-regulated DEGs,20 significantly downregulated,and one with no *** considered both the resequencing and transcriptome sequencing analyses and found that 12 trichome-related genes that were grouped into five transcription factor families containing nonsynonymous mutations and significantly down-regulated in ***,these genes are potentially promising candidate genes whose nonsynonymous mutations and down-regulation may result in scarce and short trichomes mutation on carrot stems in sst.

关键词： carrot trichome resequencing transcriptome candidate genes

Adaptive segmentation of digital mammograms through reinforcement learning

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光学精密工程 2005年第5期13卷 575-583页

作者： LIU Xin-yue fang Xiao-xuan HUANG Lian-qing Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of SciencesChangchun 130033 China China-Japan Union Hosptial of Jilin University Changchun 130033China

An approach based on reinfocement learning for the automated segmentation is presented. The approach consists of two modules:segmentation module and learning module. The segmentation module uses the region-growing algorithm combined with the smooth filtering and the morphological filtering to segment mammograms. The learning module uses the segmentation output as the feedback to learn to select the optimal parameter settings of the segmentation algorithm according to the image properties using reinforcement learning techniques. The approach can adapt itself to various kinds of mammograms through training and therefore obviates the tedious and error-prone tuning of parameter settings manually. Quantitative test results show that the approach is accurate for several kinds of mammograms. Compared to previously proposed approaches,the approach is more adaptable to different mammograms.

关键词：适应性分割平滑性计算机控制系统程序设计