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航空精密制造技术 2024年第4期60卷 46-48页

作者：赵丹丹李清晖石尚武中国航发沈阳发动机研究所沈阳110015

涡轮导向器排气面积测量精度对发动机性能参数的计算准确性有重要影响。本文开发了一套涡轮导向器排气面积检测技术,实现了涡轮导向器排气面积单组件和整盘状态的高精度在线测量,提升了发动机性能与可靠性。

关键词：涡轮导向器排气面积测量航空发动机

Controls of accommodation to sediment-supply ratio on sedimentary architecture of continental fluvial successions

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Petroleum Science 2023年第4期20卷 1961-1977页

作者： Wei li Da-li Yue Yu-Shan Du Jian li Chi Zhang Zhi-Qiang Gong Xue-Ting Zhang {3.-lin Shu Jian Gao National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China Shengli Oil Field Company SINOPECDongyingShandong257015China PetroChina Research Institute of Petroleum Exploration&Development Beijing100083China

The applicability of sequence stratigraphic models to continental fluvial successions has long been topic for debate. To improve our understanding of how fluvial architectures record responses to changes in the ratio between accommodation rate and sediment-supply rate (A/S), two case studies are analyzed, including a densely drilled subsurface fluvial reservoir imaged with a seismic cube, and an outcropping fluvial succession. The subsurface dataset provides a larger, three-dimensional perspective, whereas the outcrop dataset enables observation at higher resolution. On the basis of both datasets, channel-body density, channel-body stacking patterns and their formative river types are interpreted at different scales, and how these may reflect responses to A/S change (the rate of accommodation creation relative to the rate of sediment supply) are discussed. The results indicate that (i) channel-body stacking patterns undergo four evolutionary stages along with the A/S increase, i.e., multi-story, mixed multi- and two-story, two-story, and isolated patterns;(ii) channel-body density decreases along with the channel-body stacking patterns varying from multi-story to isolated;(iii) formative rivers types are interpreted as evolving from braided planforms to braided-meandering planforms and then to meandering ones, with the increase of A/S.

关键词： Channel body Sedimentary architecture Stacking pattern Formative river type Sequence stratigraphy A/S

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智能优化算法的模块化测试与仿真

计算机仿真 2024年第3期41卷 453-457页

作者：王苏彧瞿圆媛李庆玲中国矿业大学(北京)机电与信息工程学院北京100083

生活及工程应用中许多问题可归结为目标之间相互矛盾的多目标优化问题,其应用需求强烈、理论创新性强、模型建立难、求解方法复杂。提出了智能优化算法的模块化测试与仿真方法,以多目标粒子群算法为例,通过对算法本身参数配置,以及多测... 详细信息

生活及工程应用中许多问题可归结为目标之间相互矛盾的多目标优化问题,其应用需求强烈、理论创新性强、模型建立难、求解方法复杂。提出了智能优化算法的模块化测试与仿真方法,以多目标粒子群算法为例,通过对算法本身参数配置,以及多测试函数、多算法综合对比测试,可得出算法求解的帕累托前沿以及解集的收敛性与分布性指标,进而可评判该算法对于求解同类优化问题时的性能优劣。将上述方法应用到煤矿井下掘进截割路径规划中,得出了高效能、强安全的掘进截割最优路径。智能优化算法可用于“人工智能”相关课程课堂教学中,分析求解多目标优化问题,也可用于实验教学演示、创新实验项目,有助于提高学生的科研素养与实践能力。

关键词：多目标优化智能优化算法多目标粒子群路径规划

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山西棱柄马鞍菌的生境调查及形态学研究

安徽农业科学 2024年第3期52卷 43-46页

作者：李云霞李青韩鹏远张锁峰柴美清山西农业大学科研管理部山西太原030031

为了明确棱柄马鞍菌的发生与生态环境、土壤环境的关系,进而为棱柄马鞍菌的驯化栽培提供一定的参考依据,调查了山西岢岚地区马鞍菌发生处的生态环境和气候环境,测定了土壤养分含量,并进行了马鞍菌形态学分析。结果表明,在山西,棱柄马鞍... 详细信息

为了明确棱柄马鞍菌的发生与生态环境、土壤环境的关系,进而为棱柄马鞍菌的驯化栽培提供一定的参考依据,调查了山西岢岚地区马鞍菌发生处的生态环境和气候环境,测定了土壤养分含量,并进行了马鞍菌形态学分析。结果表明,在山西,棱柄马鞍菌发生在夏末秋初降雨过后的针叶林、次生林中,气温在10~27℃,土壤pH呈中性偏碱性,且根际土壤与非根际土壤pH无显著差异。同时,根际土壤中有机质、碱解氮、有效磷、速效钾含量明显高于非根际土壤。因此,在有机质、碱解氮、有效磷、速效钾含量高的中性偏碱性土壤中更容易发生马鞍菌。

关键词：棱柄马鞍菌生态环境土壤养分形态学分析

维普期刊数据库博看期刊

Cu/Cu2O nanostructures derived from copper oxalate as high performance electrocatalyst for glucose oxidation

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中国化学快报：英文版 2020年第7期31卷 1941-1945页

作者： Guoqiang Yuan Shangkui Yu Ji Jie Chen Wang qing li Huan Pang Guangling College Yangzhou UniversityYangzhou 225009China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225009China

Porous nanomaterials are classified as a kind of materials with great potential for development in the field of electrocatalysis,but there is still room for further improve ment as *** develop a threedimensional(3.)porous structure of Cu/Cu2O as an electrocatalyst for the glucose oxidation reaction(GOR)using the method of calcining the precursor CuC2O4·2H2O in *** obtained porous Cu/Cu2O nanostructure can provide more opportunities for effective reactions between particles,which can explain their efficient electrocatalytic ***,the as-synthesized Cu/Cu2O nanostructure exhibits outstanding electrocatalytic performance for the glucose,including good stability,excellent sensitivity and remarkable selectivity.

关键词： Copper oxalate Cu/Cu2O Electrocatalysis Glucose Porous

Small World Effects in a Harmonious Unifying Hybrid Preferential Model Networks

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Communications in Theoretical Physics 2007年第2X期48卷 377-383页

作者： FANG Jin-qing BI Qiao li Yong LU Xin-Biao liU Qiang China Institute of Atomic Energy P.O. Box 275-81 Beijing 102413 China

Small worm effects in the harmonious unifying hybrid preferential model （HUHPM） networks are studied both numerically and analytically. The idea and method of the HUHPM is applied to three typical examples of unweighted BA model, weighted BBV model, and the TDE rnodel, so-called HUHPM-BA, HUHPM-BBV and HUHPM- TDE networks. Comparing the HUHPM with current typical models above, it is found that the HUHPM networks has the smallest average path length and the biggest average clustering coefficient. The results demonstrate that the HUHPM is more suitable not only for the un-iveighted models but also for the weighted models.

关键词： harmonious unifying hybrid preferential model small world effect network science

Effect of groove rolling on the microstructure and properties of Cu–Nb microcomposite wires

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International Journal of Minerals,Metallurgy and Materials 2021年第2期28卷 279-284页

作者： Peng-fei Wang Ming liang Xiao-yan Xu Jian-qing Feng Cheng-shan li Ping-xiang Zhang Jin-shan li School of Materials Northwestern Polytechnical UniversityXi’an 710072China Northwest Institute for Nonferrous Metal Research Xi’an 710016China

Cu–Nb microcomposite wire was successfully prepared by a groove rolling *** effects of groove rolling on the diffraction peaks,microstructure,and properties of the Cu–Nb microcomposite were investigated and the microstructure evolutions and strengthening mechanism were *** tensile strength of the Cu–Nb microcomposite wire with a diameter of 2.02 mm was greater than 1 GPa,and its conductivity reached 68%of the International Annealed Copper Standard,demonstrating the Cu–Nb microcomposite wire with high tensile strength and high conductivity after groove *** results show that an appropriate groove rolling method can improve the performance of the Cu–Nb microcomposite wire.

关键词： groove rolling microstructure strengthening mechanism copper-niobium microcomposites

Monthly prediction of tropical cyclone activity over the South China Sea using the FGOALS-f2 ensemble prediction system

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Atmospheric and Oceanic Science Letters 2022年第2期15卷 26-32页

作者： Shentong li Jinxiao li Jing Yang qing Bao Yimin liu Zili Shen State Key Laboratory of Earth Surface Processes and Resource Ecology Faculty of Geographical ScienceBeijing Normal UniversityBeijingChina State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina Southern Marine Science and Engineering Guangdong Laboratory GuangzhouChina Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and TechnologyNanjingChina

The monthly prediction skill for tropical cyclone(TC)activity in the South China Sea(SCS)during the typhoon season(July to November)was evaluated using the FGOALS-f2 ensemble prediction ***,the prediction skill of the system at a 10-day lead time for monthly TC activity is given based on 3.-year(1981–2015)hindcasts with 24 ensemble *** results show that FGOALS-f2 can capture the climatology of TC track densities in each month,but there is a delay in the monthly southward movement in the area of high track densities of *** temporal correlation coefficient of TC frequency fluctuates across the different months,among which the highest appears in October(0.59)and the lowest in August(0.3.).The rank correlation coefficients of TC track densities are relatively higher(R>0.6)in July,September,and November,while those in August and October are relatively lower(R within 0.2 to 0.6).For real-time prediction of TCs in 2020(July to November),FGOALS-f2 demonstrates a skillful probabilistic prediction of TC genesis and ***,the system successfully forecasts the correct sign of monthly anomalies of TC frequency and accumulated cyclone energy for 2020(July to November)in the SCS.

关键词： Tropical cyclone South China Sea Monthly prediction Prediction system FGOALS-f2

A Study on the Mechanism of the Protective Effect of GuangeFang on Sepsis-Associated Acute Kidney Injury

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World Journal of Traditional Chinese Medicine 2021年第4期7卷 414-418页

作者： Shuo li qing-Quan liu Intensive Care Unit Beijing Hospital of Traditional Chinese MedicineCapital Medical UniversityBeijingChina

Objective:The objective of this study was to explore the mechanism of Guan Gefang(GGF);raw rhubarb 3. g,cassia arboreal 3. g,raw oyster 3. g,ground elm 60 g,and dandelion 3. *** *** and Methods:Thirty-six Sprague Dawley rats were randomly divided into a control group(Group N),a sepsis control group(Group S),and a sepsis+GGF group(Group G).For Group N,8 ml/kg 0.9%NaCl was used as an enema;for Group S,cecal ligation and puncture(CLP)method was used for modeling and 8 ml/kg 0.9%NaCl was used as an enema;and Group G,CLP was used for modeling and 8 ml/kg GGF was used as an *** of the enemas were applied once daily for 4 *** indices of serum creatinine(SCr),blood urea nitrogen(BUN),uric acid(UA),mammalian target of rapamycin(mTOR),Janus kinase 2(JAK2)were compared across each ***:Compared to Group S,Group G had lower levels of SCr,BUN,and UA(Pling pathways to protect the rats’kidneys,which had sepsis-associated acute kidney injury.

关键词： GuangeFang Janus kinase 2 mammalian target of rapamycin sepsis-associated acute kidney injury

Impacts of climate change on drought risk of winter wheat in the North China Plain

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Journal of Integrative Agriculture 2021年第10期20卷 2601-2612页

作者： ZHANG li CHU qing-quan JIANG Yu-lin CHEN Fu LEI Yong-deng College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100193P.R.China Key Laboratory of Farming System Ministry of Agriculture and Rural AffairsBeijing 100193P.R.China

Drought is a major natural disaster causing crop yield losses,while its occurrence mechanism and spatiotemporal variations in a changing climate are still not *** on a long-term climatic dataset(during 1958–2015)from weather stations in the North China Plain(NCP),the influencing mechanism of various climatic factors on drought risk of winter wheat was quantified by using sensitivity analysis,Mann-Kendall trend test and slope *** results indicated that climatic factors have changed considerably over the past six decades in the growth season of winter *** a result,winter wheat suffered from severe droughts(with 3.0 mm of water deficit during its growth season),particularly at the jointing–heading and heading–mature stages,which were critical to crop yield *** were large spatial and temporal variations in drought risk and climatic change factors at different growth stages of winter *** precipitation playing a vital role in determining the spatiotemporal patterns of drought risk,high temperature and low humidity along with other climatic factors at key growth stages of winter wheat aggravated drought ***,temperature at nearly 90%weather stations showed a notablely upward trend,which exacerbated water deficit and drought risk of winter *** the complexity and high uncertainty of climate change,these findings provide important information for adapting crop production to future climate change and accompanied droughts while ensuring food security and agricultural sustainability.

关键词： climate change winter wheat drought risk spatiotemporal variations food security