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大中型水库移民生产生活水平指标体系与实证评价研究

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中国农村水利水电 2024年第1期 268-274页

作者：董鹤亭许桂生苑鹏飞冯湘萍华北电力大学水利与水电工程学院北京102206 广东粤海珠三角供水有限公司广东广州511457 广西水利电力勘测设计研究院广西南宁530023

以GX自治区WZ市2021年度大中型水库移民后期扶持政策实施情况监测评估项目为案例,基于10个移民村200户移民家庭的原始调查数据,采用灰色聚类-复相关-信息灵敏度法,构建了包括人均可支配收入等指标的评价指标体系;利用熵值法和环比评分... 详细信息

以GX自治区WZ市2021年度大中型水库移民后期扶持政策实施情况监测评估项目为案例,基于10个移民村200户移民家庭的原始调查数据,采用灰色聚类-复相关-信息灵敏度法,构建了包括人均可支配收入等指标的评价指标体系;利用熵值法和环比评分法分别计算指标权重后,应用基于博弈论的组合赋权法确定了评价指标的主客观组合权重;结合调查数据及官方统计数据确定指标分级标准,利用综合评分法计算移民的生产生活水平指数,并运用该指数对样本村水库移民生产生活水平进行了实证评价。结果表明,采用本文方法构建的指标体系和评价模型相对合理、有效,评价结果符合实际,可为水库移民后期扶持效果评价及其他相关评价工作提供参考。

关键词：水库移民后期扶持指标体系组合赋权实证评价

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New Periodic Solutions for a Class of Singular Hamiltonian Systems

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Acta Mathematica Sinica,English Series 2013年第6期29卷 1205-1218页

作者： peng fei yuan Shi Qing ZHANG Department of Mathematics Sichuan University

In this paper, we apply a variant of the famous Mountain Pass Lemmas of Ambrosetti-Rabinowitz and Ambrosetti-Coti Zelati with （PSC）c type condition of Palais-Smale-Cerami to study the existence of new periodic solutions with a prescribed energy for symmetrical singular second order Hamiltonian conservative systems with weak force type potentials.

关键词： Singular Hamiltonian systems periodic solutions Mountain Pass Lemma Palais–Smale–Cerami condition

火针联合滋肾清肝汤治疗肝经郁热证带状疱疹的临床观察

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广州中医药大学学报 2024年第7期41卷 1812-1819页

作者：闫智会王玉袁鹏飞李苗承德市中医院针灸科河北承德067000

【目的】观察火针联合滋肾清肝汤治疗肝经郁热证带状疱疹的临床疗效。【方法】将60例肝经郁热证带状疱疹患者随机分为观察组和对照组,每组各30例,对照组给予火针刺入疱疹处治疗,观察组在对照组治疗的基础上,给予滋肾清肝汤联合治疗。2... 详细信息

【目的】观察火针联合滋肾清肝汤治疗肝经郁热证带状疱疹的临床疗效。【方法】将60例肝经郁热证带状疱疹患者随机分为观察组和对照组,每组各30例,对照组给予火针刺入疱疹处治疗,观察组在对照组治疗的基础上,给予滋肾清肝汤联合治疗。2组均治疗4周。治疗1个月后,评价2组临床疗效,观察2组患者治疗后临床症状消退时间,包括疱疹停止出现(无新水疱出现的时间)、疱疹完全消退(疱疹出现至完全消退的时间)、疼痛消失(疼痛发作至开始减轻的时间)、结痂(疱疹治疗后至结痂的时间)、脱痂(结痂至脱痂的时间)。比较2组患者治疗前后疼痛视觉模拟量表(VAS)评分以及P物质(SP)、前列腺素E2(PGE2)和β-内啡肽(β-EP)的变化情况,以及免疫球蛋白A(IgA)、免疫球蛋白G(IgG)、免疫球蛋白M(IgM)的情况。并评价2组的安全性及不良反应的发生情况。【结果】(1)观察组总有效率为96.67%(29/30),对照组为80.00%(24/30)。观察组疗效优于对照组,差异有统计学意义(P0.05)。【结论】火针联合滋肾清肝汤治疗肝经郁热证带状疱疹,能明显缩短患者临床症状的消退时间,减轻患者的疼痛症状,疗效显著,且安全性高。

关键词：火针针刺滋肾清肝汤体液免疫疼痛介质带状疱疹临床观察

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高变比LLC型矩阵式谐振变换器的效率优化

电力电子技术 2024年第7期58卷 43-46,59页

作者：艾胜袁鹏飞陈宏伟赵彦卿海军工程大学电磁能技术全国重点实验室湖北武汉430033

在高压输入、低压大电流输出的应用场合,LLC谐振变换器在变压器和整流管上产生巨大损耗,不能有效凸显LLC谐振变换器高效率的特点。针对此问题,这里通过采用矩阵式平面变压器、同步整流控制策略等措施极大降低了LLC谐振变换器的损耗,变... 详细信息

在高压输入、低压大电流输出的应用场合,LLC谐振变换器在变压器和整流管上产生巨大损耗,不能有效凸显LLC谐振变换器高效率的特点。针对此问题,这里通过采用矩阵式平面变压器、同步整流控制策略等措施极大降低了LLC谐振变换器的损耗,变换器的效率得到了显著提升。同时进行了同步整流效率和暂态稳定性的实验验证。

关键词：谐振变换器矩阵式平面变压器同步整流暂态稳定性

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有机固废资源化智能装备应用的社会价值

价值工程 2024年第18期43卷 166-168页

作者：冯书妙石磊郄同军周悦苑鹏飞河北九知科技有限公司石家庄050011 河北交通职业技术学院石家庄050000 财达证券股份有限公司石家庄050000

超高温生物发酵技术是提高有机固废无害化、减量化、资源化生产效率的重要手段,不受气候影响,可全天候生产,日清日洁,避免堆放所产生的二次污染,利用快速升温技术使微生物的能量代谢、碳水化合物的代谢迅速达到峰值,又利用其代谢产热的... 详细信息

超高温生物发酵技术是提高有机固废无害化、减量化、资源化生产效率的重要手段,不受气候影响,可全天候生产,日清日洁,避免堆放所产生的二次污染,利用快速升温技术使微生物的能量代谢、碳水化合物的代谢迅速达到峰值,又利用其代谢产热的特征,保持代谢温度持续,大幅度缩减代谢周期,实现资源化过程的节能降耗。嗜高温菌群对氧化亚氮的超强抑制作用,最大限度地减少温室气体排放,实现减污降碳。

关键词：超高温生物发酵装备有机固废资源化节能降耗减污降碳

A modified stochastic model for LS+AR hybrid method and its application in polar motion short-term prediction

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Geodesy and Geodynamics 2024年第1期15卷 100-105页

作者： fei Ye Yunbin yuan State Key Laboratory of Geodesy and Earth's Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430077China BeiDou High-precision Satellite Navigation and Location Service Hunan Engineering Research Center Hunan Institute of Geomatics Sciences and TechnologyChangsha 410007China Hunan Continuously Operating Reference Stations(HNCORS)Data Center Hunan Institute of Geomatics Sciences and TechnologyChangsha 410007China

Short-term(up to 30 days)predictions of Earth Rotation Parameters(ERPs)such as Polar Motion(PM:PMX and PMY)play an essential role in real-time applications related to high-precision reference frame ***,least squares(LS)+auto-regressive(AR)hybrid method is one of the main techniques of PM ***,the weighted LS+AR hybrid method performs well for PM short-term ***,the corresponding covariance information of LS fitting residuals deserves further exploration in the AR *** this study,we have derived a modified stochastic model for the LS+AR hybrid method,namely the weighted LS+weighted AR hybrid *** using the PM data products of IERS EOP 14 C04,the numerical results indicate that for PM short-term forecasting,the proposed weighted LS+weighted AR hybrid method shows an advantage over both the LS+AR hybrid method and the weighted LS+AR hybrid *** to the mean absolute errors(MAEs)of PMX/PMY sho rt-term prediction of the LS+AR hybrid method and the weighted LS+AR hybrid method,the weighted LS+weighted AR hybrid method shows average improvements of 6.61%/12.08%and 0.24%/11.65%,***,for the slopes of the linear regression lines fitted to the errors of each method,the growth of the prediction error of the proposed method is slower than that of the other two methods.

关键词： Stochastic model LS+AR Short-term prediction The earth rotation parameter(ERP) Observation model

Improved LS+MAR hybrid method to UT1-UTC ultra-short-term prediction by using first-order-difference UT1-UTC

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Geodesy and Geodynamics 2024年第4期15卷 379-385页

作者： fei Ye Yunbin yuan BeiDou High-precision Satellite Navigation and Location Service Hunan Engineering Research Center Hunan Institute of Geomatics Sciences and TechnologyChangsha410007China State Key Laboratory of Geodesy and Earth's Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan430077China HNCORS Data Center Hunan Institute of Geomatics Sciences and TechnologyChangsha 410007China

Accurate ultra-short-term prediction of the Earth rotation parameters(ERP)holds paramount impor-tance for real-time applications,particularly in reference frame *** them,diurnal rota-tion(UT1-UTC)which cannot be directly estimated through Global Navigation Satellite System(GNSS)techniques,significantly affects the rapid and ultra-rapid orbit determination of GNsS ***-ently,the traditional LS(least squares)+AR(autoregressive)and LS+MAR(multivariate autoregressive)hybrid methods stand as primary approaches for UT1-UTC ultra-short-term predictions(1-10 days).The LS+MAR hybrid method relies on the UT1-UTC and LOD(length of day)***,the correlation between LOD and first-order-difference UT1-UTC is stronger than that between LOD and *** light of this,and with the aid of the first-order-difference UT1-UTC,we propose an enhanced LS+MAR hybrid method to UT1-UTC ultra-short-term *** using the UT1-UTC and LOD data series of the IERS(International Earth Rotation and Reference Systems Service)EOP 14 C04 product,we conducted a thorough analysis and evaluation of the improved method's prediction performance compared to the traditional LS+AR and LS+MAR hybrid *** to the numerical results over more than 210 days,they demonstrate that,when considering the correlation information between the LoD and the first-order-difference UT1-UTC,the mean absolute errors(MAEs)of the improved LS+MAR hybrid method range from 21 to 934μs in 1-10 days *** comparison to the traditional LS+AR hybrid method,the MAEs show a reduction of 7-53μs in 1-10 days predictions,with corresponding improvement percentages ranging from 1 to 28%.Similarly,when compared to the traditional LS+MAR hybrid method,the MAEs have a reduction of 5-42μs in 1-10 days predictions,with corresponding improvement percentages ranging from 4-20%.Additionally,when aided by GNSS-derived LOD data series,the MAEs of improved LS+MAR hybrid method experience further

关键词： UT1-UTCultra-short-termprediction Rapidandultra-rapidproducts LS+AR and LS+MAR Correlation First-order-differenceUT1-UTC

MOF-Derived Iron-Cobalt Phosphide Nanoframe as Bifunctional Electrocatalysts for Overall Water Splitting

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Energy & Environmental Materials 2024年第6期7卷 312-320页

作者： Yanqi yuan Kun Wang Boan Zhong Dongkun Yu fei Ye Jing Liu Joydeep Dutta peng Zhang School of Materials Science and Engineering Shanghai Jiao Tong University800 Dongchuan RoadShanghai 200240China Functional NanoMaterials Group Department of Applied PhysicsSchool of Engineering SciencesKTH Royal Institute of TechnologyHannes Alfv´ens v¨ag 1211419StockholmSweden Shanghai Key Laboratory of Hydrogen Science Shanghai 200240China

Transition metal phosphides(TMPs)have emerged as an alternative to precious metals as efficient and low-cost catalysts for water *** doping and morphology control are effective approaches to further improve the performance of ***,Fe-doped CoP nanoframes(Fe-CoP NFs)with specific open cage configuration were designed and *** unique nano-framework structured Fe-CoP material shows overpotentials of only 255 and 122 mV at 10 mA cm^(−2)for oxygen evolution reaction(OER)and hydrogen evolution reaction(HER),respectively,overwhelming most transition metal *** overall water splitting,the cell voltage is 1.65 V for Fe-CoP NFs at a current density of 10 mA cm^(−2),much superior to what is observed for the classical nanocubic ***-CoP NFs show no activity degradation up to 100 h which contrasts sharply with the rapidly decaying performance of noble metal catalyst *** superior electrocatalytic performance of Fe-CoP NFs due to abundant accessible active sites,reduced kinetic energy barrier,and preferable*O-containing intermediate adsorption is demonstrated through experimental observations and theoretical *** findings could provide a potential method for the preparation of multifunctional material with hollow structures and offer more hopeful prospects for obtaining efficient earth-abundant catalysts for water splitting.

关键词： electrocatalysis hollow structure iron-doped cobalt phosphide MOF overall water splitting

Coupling of RANS and BEM Solvers for Simulation of Propeller Behind the Hull in Full Appended Model

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China Ocean Engineering 2024年第3期38卷 424-438页

作者： Saeed NAJAFI Mehdi POURMOSTAFA LIU peng-fei Iranian National Institute for Oceanography and Atmospheric Science(INIOAS) Tehran 14155-4781Iran Department of Maritime Engineering Amir Kabir University of TechnologyTehran 15875-4413Iran Marine Offshore and Subsea TechnologySchool of EngineeringNewcastle UniversityNewcastle upon TyneNE17RUUK

To design a propeller for ship power plant,the interaction between ship hull and propeller must be taken into *** main concern is to apply the wake effect of ship stern on the propeller *** this paper,a coupled BEM(Boundary Element Method)/RANS(Renolds-Averaged Navier−Stokes)solver is used to simulate propeller behind the hull in the self-propulsion *** motivation of this work is to develop a practical tool to design marine propulsion system without suffering long computational *** unsteady boundary element method which is also known as panel method is chosen to estimate the propeller *** wakes are treated using a time marching wake alignment ***,a RANS code coupled with VoF equation is developed to consider the ship motions and wake field effects in the problem.A coupling algorithm is developed to interchange ship wake field to the potential flow solver and propeller thrust to the RANS *** on the difference between hull resistance and the propeller thrust,a PI controller is developed to compute the propeller RPM in every time *** of the solver is carried out using the towing tank test report of a 50 m oceanography research *** factor and trust deduction coefficient are estimated ***,the wake rollup pattern of the propeller in open water is compared with the propeller in real wake field.

关键词： RANS BEM coupled method ship propeller self-propulsion wake sheet pattern