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火电厂电气自动化系统改进研究

价值工程 2024年第19期43卷 91-94页

作者：杨东林贵州兴义电力发展有限公司兴义562422

本研究旨在探讨如何在能源与环境双重压力下提升火电厂电气自动化系统的运行效率及降低能源消耗。通过引入先进的控制算法如蚁群算法和混合算法,增强系统自学习能力;构建模块化、可扩展的设计框架;以及引入远程监控与诊断技术,本研究采... 详细信息

本研究旨在探讨如何在能源与环境双重压力下提升火电厂电气自动化系统的运行效率及降低能源消耗。通过引入先进的控制算法如蚁群算法和混合算法,增强系统自学习能力;构建模块化、可扩展的设计框架;以及引入远程监控与诊断技术,本研究采用了一系列创新方法以改进电气自动化系统。结果显示,这些策略不仅显著提升了系统的运行效率和稳定性,还大幅降低了维护成本,为系统的持续发展和技术进步提供了坚实基础。结论表明,通过这些技术的应用,火电厂电气自动化系统能够实现更高效、低碳的转型,对于促进电力系统的稳定和可靠运行具有重要意义。

关键词：火电厂电气自动化先进控制算法模块化设计远程监控与诊断

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An artificial intelligence based method for evaluating power grid node importance using network embedding and support vector regression

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Frontiers of Information Technology & Electronic Engineering 2019年第6期20卷 816-828页

作者： Hui-fang WANG Chen-yu ZHANG dong-yang lin Ben-teng HE Department of Electrical Engineering Zhejiang University Hangzhou 310027 China State Grid Jiangsu Electric Power Engineering Consulting Co. Ltd. Nanjing 210008 China

The identification of important nodes in a power grid has considerable benefits for safety. Power networks vary in many aspects, such as scale and structure. An index system can hardly cover all the information in various situations. Therefore, the efficiency of traditional methods using an index system is case-dependent and not universal. To solve this problem, an artificial intelligence based method is proposed for evaluating power grid node importance. First, using a network embedding approach, a feature extraction method is designed for power grid nodes, considering their structural and electrical information. Then, for a specific power network, steady-state and node fault transient simulations under various operation modes are performed to establish the sample set. The sample set can reflect the relationship between the node features and the corresponding importance. Finally, a support vector regression model is trained based on the optimized sample set for the later online use of importance evaluation. A case study demonstrates that the proposed method can effectively evaluate node importance for a power grid based on the information learned from the samples. Compared with traditional methods using an index system, the proposed method can avoid some possible bias. In addition, a particular sample set for each specific power network can be established under this artificial intelligence based framework, meeting the demand of universality.

关键词： Power grid Artificial intelligence Node importance Text-associated Deep Walk Network embedding Support vector regression

Pregnancy outcomes in women with heart disease

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Chinese Medical Journal 2010年第17期123卷 2324-2330页

作者： LIU Hua XU Ji-wen ZHAO Xu-dong YE Tai-yang lin Jian-hua lin Qi-de Department of Obstetrics and Gynecology Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai Obstetrical Cardiology Intensive Care Center Shanghai 200127 China

Background As the Shanghai Obstetrical Cardiology Intensive Care Center, our hospital has accumulated a large number of clinical data of pregnant women with heart disease. This paper is a retrospective analysis of 1142 pregnancies in women with heart disease so as to evaluate the maternal and fetal outcomes of these *** A retrospective analysis was carried out for pregnancies in 1142 women with heart disease who delivered in Shanghai Obstetrical Cardiology Intensive Care Center between 1993 and *** In this study, main heart diseases in pregnancy were arrhythmia （n=359, 31.4%）, congenital heart disease （CHD; n=291,25.5%）, and myocarditis and its sequelae （n=284, 24.9%）; based on the functional classification criteria of New York Heart Association （NYHA）, more than half （n=678, 59.4%） of patients were classified NYHA Class Ⅰ; pregnant women in NHYA Class Ⅰ-Ⅱ （n=951, 83.3%） commonly had arrhythmia, myocarditis and its sequelae, while those in NHYA Class Ⅲ-Ⅳ （n=191, 16.7%） mainly had CHD, rheumatic heart disease （RHD）, cardiopathy induced by hypertensive disorders complicating pregnancy, and peripartum cardiomyopathy （PPCM）. Cardiac failure occurred in 97 （8.5%）patients, and 8 （0.7%） maternal deaths and 12 （1.1%） perinatal deaths were reported in this study. Compared with those in NHYA Class Ⅰ-Ⅱ, women in NHYA Class Ⅲ-Ⅳ had a significantly lower gestational age at birth （P 〈0.05）, lower birth weight （P 〈0.01）, and higher incidence of preterm delivery, small for gestational age and perinatal death （P 〈0.01）. The incidence of cardiac failure in pregnant women with cardiopathy induced by hypertensive disorders complicating pregnancy and PPCM was relatively high, with a rate of 80% and 52.2%, respectively. After cardiac operation, 131（90.3%） women were in classified NHYA Class Ⅰ-Ⅱ and 14 （9.7%） in NHYA Class Ⅲ-Ⅳ.Conclusions Arrhythmia is the type of heart disease that has a highest incidence in patients with heart disease in pregnancy, while main types

关键词： heart disease cardiac function pregnancy outcome

Realizing the excellent oxidation resistance of an environmental barrier coating through aluminum surface modification

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Journal of Advanced Ceramics 2024年第7期13卷 976-986页

作者： lin dong Wen-Qi yang lin Chen Guan-Jun yang Chang-Jiu Li State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China Xi’an Aerospace Engine Company Limited in China Aerospace Science and Technology Corporation Xi’an 710065China

The lifetime of Si-based environmental barrier coatings(EBCs)is constrained by thermally grown SiO_(2)oxidelayer(SiO_(2)-TGO),which can cause premature cracking and *** address this issue,a new approach for surfacemodification using aluminum is *** oxidation performance was examined in a 50 vol%H_(2)O-50 vol%O_(2)environment at 1350℃for up to 300 *** results indicate that a dense ytterbium aluminum garnet(YbAG)layer wasformed after modification,decreasing the porosity by 80%.Due to the elimination of fast diffusion channels and the lowoxygen permeability of YbAG,aluminum modification significantly reduced the growth rate of SiO_(2)-TGO by nearly twoorders of ***,its thickness decreased by more than 70%after 300 h of exposure.A diffusioncontrolled oxidation mechanism indicates that the modified dense surface is equivalent to an initial SiO_(2)layer with a specificthickness,causing a shift in the oxidation time and increasing the oxidation *** research provides valuableinsights for designing Si-based EBC with improved lifetimes.

关键词： environmental barrier coating(EBC) oxidation modification diffusion cracking

柠檬精油活性成分柠檬醛抑制头颈癌细胞增殖的机制研究

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中国中药杂志 2024年第9期49卷 2364-2375页

作者：陈利张亚军秦洪文胡武静刘俨娇肖国生杜慧慧杨东林重庆三峡学院生物与食品工程学院重庆404120 重庆文理学院药学院(创新靶向药物国际研究院) 重庆402160

探索柠檬精油中发挥抗肿瘤作用的活性物质以及抑制头颈癌细胞SCC15和CAL33增殖的分子机制,该研究利用噻唑蓝[3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay,MTT]鉴定出抑制头颈癌细胞增殖的活性物质为柠檬醛,并... 详细信息

探索柠檬精油中发挥抗肿瘤作用的活性物质以及抑制头颈癌细胞SCC15和CAL33增殖的分子机制,该研究利用噻唑蓝[3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay,MTT]鉴定出抑制头颈癌细胞增殖的活性物质为柠檬醛,并测定了柠檬醛抑制头颈癌细胞和正常细胞的IC50;同时,利用5-ethynyl-2′-deoxyuridine(EdU)实验检测柠檬醛对头颈癌细胞增殖率的影响,通过克隆形成实验检测柠檬醛对头颈癌细胞体外肿瘤球形成的影响。通过流式细胞术检测柠檬醛对头颈癌细胞周期阻滞和凋亡诱导情况;采用蛋白印迹检测柠檬醛对头颈癌细胞周期和凋亡相关蛋白表达水平的影响。结果表明柠檬醛可有效抑制头颈癌细胞的生长增殖,具有抗肿瘤活性,其抑制CAL33和SCC15的半数抑制浓度分别为54.78、25.23μg·mL^(-1)。进一步分析发现细胞周期相关蛋白S期激酶关联蛋白2(SKP2)、原癌基因(C-MYC)、细胞周期依赖性激酶1(CDK1)、周期蛋白B(cyclin B)均呈下调趋势,细胞周期阻滞于G2/M期。此外,柠檬醛能够促使细胞凋亡相关蛋白半胱天冬蛋白酶-3(caspase-3)、半胱天冬蛋白酶-9(caspase-9)和多聚腺苷二磷酸核糖聚合酶(PARP)剪切形式呈现上调趋势,而且使自噬相关蛋白微管相关蛋白1轻链3B(LC3B)、泛素结合蛋白(P62)、自噬效应蛋白Beclin1(Beclin1)和溶酶体相关膜蛋白1(LAMP1)表达呈上调趋势,暗示柠檬醛诱导头颈癌细胞发生凋亡和激活自噬。利用双标质粒系统mCherry-GFP-LC3分析发现柠檬醛阻碍自噬体和溶酶体融合,使自噬流进程受阻。因此,柠檬精油中发挥抗头颈癌细胞增殖的主要活性成分是柠檬醛,该成分对头颈癌细胞具有显著的抑制作用,其分子机制可能是柠檬醛通过阻滞细胞周期,诱导细胞发生凋亡和自噬,最终抑制肿瘤细胞增殖。

关键词：柠檬醛头颈癌抗肿瘤凋亡自噬

Deep decalcification of factory-provided freezing acidolysis solution to achieveα-high-strength gypsum

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Chinese Journal of Chemical Engineering 2024年第5期69卷 143-151页

作者： Wencai Ye Yulu Li Yonggang dong lin yang Yun Yi Jianxin Cao School of Chemistry and Chemical Engineering Guizhou UniversityGuiyang 550025China Engineering Research Center of Efficient Utilization for Industrial Waste Guizhou UniversityGuiyang 550025China Key Laboratory of Guizhou Province for Green Chemical Industry and Clean Energy Technology Guizhou UniversityGuiyang 550025China

The freezing acidolysis solution of the nitric acid-phosphate fertilizer process has a high calcium content,which makes it difficult to produce fine phosphate and high water-soluble phosphate fertilizer ***,based on the potential crystallization principle of calcium sulfate in NH_(4)NO_(3)-H_(3)PO_(4)-H_(2)O,the deep decalcification(*** removal)technology to achieveα-high-strength gypsum originated from freezing acidolysis-solutions has been firstly proposed and ***,calcium can be removed from the factory-provided freezing acidolysis-solution by neutralizing it with ammonia,followed by the addition of ammonium sulfate *** a result,the formation of calcium sulfate in the reaction system undergoes the nucleation and growth of CaSO_(4)·2H_(2)O(DH),as well as its dissolution and crystallization into short columnarα-CaSO_(4)·0.5H_(2)O(α-HH).Remarkably,with the molar ratio of SO_(4)^(2-)/Ca^(2+)at 1.8,the degree of neutralization(NH_(3)/HNO_(3) molar ratio)at 1.7,the reaction temperature of 94℃,and the reaction time of 300 min,the decalcification rate can reach 86.89%,of which the high-strengthα-CaSO_(4)·0.5H_(2)O(α-HH)will be ***,the deep decalcification product meets the standards for the production of fine phosphates and highly water-soluble phosphate ***,the 2 h flexural strength ofα-HH is 5.3 MPa and the dry compressive strength is 36.8 MPa,which is up to the standard of commercialα-HH.

关键词： Nitrophosphate Ammonia neutralization Deep decalcification High-strengthα-hemihydrate gypsum Controlled crystallization at atmospheric pressure

Multifunctional MOF@COF Nanoparticles Mediated Perovskite Films Management Toward Sustainable Perovskite Solar Cells

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Nano-Micro Letters 2024年第9期16卷 195-208页

作者： Yayu dong Jian Zhang Hongyu Zhang Wei Wang Boyuan Hu Debin Xia Kaifeng lin lin Geng Yulin yang MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangPeople’s Republic of China School of Materials Science and Engineering East China Jiaotong UniversityNanchang 330013JiangxiPeople’s Republic of China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangPeople’s Republic of China

Although covalent organic frameworks(COFs)with highπ-conjugation have recently exhibited great prospects in perovskite solar cells(PSCs),their further application in PSCs is still hindered by face-to-face stacking and aggregation ***,metal-organic framework(MOF-808)is selected as an ideal platform for the in situ homogeneous growth of a COF to construct a core-shell MOF@COF nanoparticle,which could effectively inhibit COF stacking and *** synergistic intrinsic mechanisms induced by the MOF@COF nanoparticles for reinforcing intrinsic stability and mitigating lead leakage in PSCs have been *** complementary utilization ofπ-conjugated skeletons and nanopores could optimize the crystallization of large-grained perovskite films and eliminate *** resulting PSCs achieve an impressive power conversion efficiency of 23.61%with superior open circuit voltage(1.20 V)and maintained approximately 90%of the original power conversion efficiency after 2000 h(30-50%RH and 25-30℃).Benefiting from the synergistic effects of the in situ chemical fixation and adsorption abilities of the MOF@COF nanoparticles,the amount of lead leakage from unpackaged PSCs soaked in water(<5 ppm)satisfies the laboratory assessment required for the Resource Conservation and Recovery Act Regulation.

关键词： Perovskite solar cells Covalent organic frameworks Metal-organic frameworks Lead leakage Stability

A reweighted damped singular spectrum analysis method for robust seismic noise suppression

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Petroleum Science 2024年第3期21卷 1671-1682页

作者： Wei-lin Huang Yan-Xin Zhou yang Zhou Wei-Jie Liu Ji-dong Li State Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing2249China SINOPEC Petroleum Exploration and Production Research Institute Beijing102206China SINOPEC Geophysical Research Institute Nanjing211103jiangsuChina

(Multichannel)Singular spectrum analysis is considered as one of the most effective methods for seismic incoherent noise *** utilizes the low-rank feature of seismic signal and regards the noise suppression as a low-rank reconstruction ***,in some cases the seismic geophones receive some erratic disturbances and the amplitudes are dramatically larger than other *** presence of this kind of noise,called erratic noise,makes singular spectrum analysis(SSA)reconstruction unstable and has undesirable effects on the final *** robustify the low-rank reconstruction of seismic data by a reweighted damped SSA(RD-SSA)*** incorporates the damped SSA,an improved version of SSA,into a reweighted *** damping operator is used to weaken the artificial disturbance introduced by the low-rank projection of both erratic and random *** central idea of the RD-SSA method is to iteratively approximate the observed data with the quadratic norm for the first iteration and the Tukeys bisquare norm for the rest *** RD-SSA method can suppress seismic incoherent noise and keep the reconstruction process robust to the erratic *** feasibility of RD-SSA is validated via both synthetic and field data examples.

关键词： Singular spectrum analysis Damping operator Seismic erratic noise Seismic signal processing Robust low-rank reconstruction

Hybrid 2D/3D Graphitic Carbon Nitride-Based High-Temperature Position-Sensitive Detector

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Energy & Environmental Materials 2024年第1期7卷 279-287页

作者： Xuexia Chen dongwen yang Xun yang Qing Lou Zhiyu Liu Yancheng Chen Chaofan Lv lin dong Chongxin Shan Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Material Physics Ministry of Education School of Physics and Microelectronics Zhengzhou University

Ultraviolet position-sensitive detectors(PSDs) are expected to undergo harsh environments,such as high temperatures,for a wide variety of applications in military,civilian,and ***,no report on relevant PSDs operating ... 详细信息

关键词： graphitic carbon nitride high-temperature stability lateral photovoltaic effect position-sensitive detectors two-dimensional materials