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Application of Muskingum routing method with variable parameters in ungauged basin

Water Science and Engineering 2011年第1期4卷 1-12页

作者： xiao-meng song Fan-zhe KONG Zhao-xia ZHU School of Resource and Earth Science China University of Mining and Technology Xuzhou 221116 P. R. China Graduate School China University of Mining and Technology Xuzhou 221008 P. R. China Department of Resources and Survey Engineering Chongqing Vocational Institute of Engineering Chongqing 400037 B R. China

This paper describes a flood routing method applied in an ungauged basin, utilizing the Muskingum model with variable parameters of wave travel time K and weight coefficient of discharge x based on the physical characteristics of the river reach and flood, including the reach slope, length, width, and flood discharge. Three formulas for estimating parameters of wide rectangular, triangular, and parabolic cross sections are proposed. The influence of the flood on channel flow routing parameters is taken into account. The HEC-HMS hydrological model and the geospatial hydrologic analysis module HEC-GeoHMS were used to extract channel or watershed characteristics and to divide sub-basins. In addition, the initial and constant-rate method, user synthetic unit hydrograph method, and exponential recession method were used to estimate runoff volumes, the direct runoff hydrograph, and the baseflow hydrograph, respectively. The Muskingum model with variable parameters was then applied in the Louzigou Basin in Henan Province of China, and of the results, the percentages of flood events with a relative error of peak discharge less than 20% and runoff volume less than 10% are both 100%. They also show that the percentages of flood events with coefficients of determination greater than 0.8 are 83.33%, 91.67%, and 87.5%, respectively, for rectangular, triangular, and parabolic cross sections in 24 flood events. Therefore, this method is applicable to ungauged basins.

关键词： Muskingum model," flood routing." variable parameters ungauged basin HEC-HMS

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Parameter identification and global sensitivity analysis of Xin'anjiang model using meta-modeling approach

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Water Science and Engineering 2013年第1期6卷 1-17页

作者： xiao-meng song Fan-zhe KONG Che-sheng ZHAN Ji-wei HAN Xin-hua ZHANG Hydrology and Water Resources Department Nanjing Hydraulic Research Institute School of Resource and Earth Science China University of Mining and Technology Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University

Parameter identification, model calibration, and uncertainty quantification are important steps in the model-building process, and are necessary for obtaining credible results and valuable information. Sensitivity analysis of hydrological model is a key step in model uncertainty quantification, which can identify the dominant parameters, reduce the model calibration uncertainty, and enhance the model optimization efficiency. There are, however, some shortcomings in classical approaches, including the long duration of time and high computation cost required to quantitatively assess the sensitivity of a multiple-parameter hydrological model. For this reason, a two-step statistical evaluation framework using global techniques is presented. It is based on （1） a screening method （Morris） for qualitative ranking of parameters, and （2） a variance-based method integrated with a meta-model for quantitative sensitivity analysis, i.e., the Sobol method integrated with the response surface model （RSMSobol）. First, the Morris screening method was used to qualitatively identify the parameters＇ sensitivity, and then ten parameters were selected to quantify the sensitivity indices. Subsequently, the RSMSobol method was used to quantify the sensitivity, i.e., the first-order and total sensitivity indices based on the response surface model （RSM） were calculated. The RSMSobol method can not only quantify the sensitivity, but also reduce the computational cost, with good accuracy compared to the classical approaches. This approach will be effective and reliable in the global sensitivity analysis of a complex large-scale distributed hydrological model.

关键词： Xin'anjiang model," global sensitivity analysis parameter identification meta-modeling approach," response surface model

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Semi-mature MyD88-silenced bone marrow dendritic cells prolong the allograft survival in a rat model of intestinal transplantation

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Chinese Medical Journal 2011年第2期124卷 268-272页

作者： YANG xiao-jun meng song Zhu Chun-fu JIANG Hong WU Wen-xi Department of General Surgery First Affiliated Hospital of Nanjing Medical University Nanjing Jiangsu 210029 China

Background Semi-mature dendritic cells （DCs） may induce tolerance rather than ***,little is known about the regulatory mechanism by which these DCs induce transplant *** differentiation factor 88 （MyD88） is a key adaptor of Toil-like receptor signaling,which plays a critical role in DC *** of MyD88-silenced immature DCs results in the generation of semi-mature *** explored the possibility of using these DCs to induce intestinal transplant tolerance in *** MyD88 expression was silenced in bone marrow DCs （F344 rats） using small interfering RNAs for 24 hours,at which point,lipopolysaccharide （LPS） was added to the culture for another 48 *** cells were analyzed for their in vitro and in vivo tolerizing *** Semi-mature DCs expressing moderate levels of MHC class Ⅱ and low levels of co-stimulatory molecules were found to produce interleukin （IL）-10,while IL-12 production was *** vitro co-culture with completely allogeneic T cells from Wistar rats led to a significant decrease in alloreactive T-cell *** vivo,the transfer of semi-mature DCs （1×106 ceils） followed by the transplantation of fully mismatched intestinal grafts （F344 rats） led to significantly prolonged survival compared to rats receiving immature and mature *** from semi-mature DC-treated rats contained lower concentrations of the pro-inflammatory cytokines IL-2 and interferon-Y 5 days after *** Semi-mature DCs may promote inducible allograft tolerance and this study suggests a new strategy by which to facilitate the induction of transplant tolerance.

关键词： dendritic cell immune tolerance intestinal transplantation

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Electrochemical conversion of methane to bridge the gap in the artificial carbon cycle

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Journal of Energy Chemistry 2025年第1期100卷 286-308页

作者： Yuhao Peng Yuefeng song Ihar Razanau Juanxiu xiao Wei xiao Di Hu Guoxiong Wang College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power Sources Wuhan University State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Dalian Institute of Chemical Physics Chinese Academy of Sciences Laboratory of Physical-Chemical Technologies SSPA Scientific and Practical Materials Research Centre of NAS of Belarus State Key Laboratory of Marine Resources Utilization in South China Sea Collaborative Innovation Center of Marine Science and Technology School of Marine Science and Engineering Hainan University Department of Chemical and Environmental Engineering University of Nottingham Ningbo China

Methane, an abundant one-carbon（C1） resource, is extensively used in the industrial production of vital fuels and value-added chemicals. However, current industrial methane conversion technologies are energy-and carbon-intensive, mainly due to the high activation energy required to break the inert C–H bond, low selectivity, and problematic side reactions, including CO2emissions and coke deposition. Electrochemical conversion of methane（ECM） using intermittent renewable energy offers an attractive solution, due to its modular reactor design and operational flexibility across a broad spectrum of temperatures and pressures. This review emphasizes conversion pathways of methane in various reaction systems, highlighting the significance and advantages of ECM in facilitating a sustainable artificial carbon cycle. This work provides a comprehensive overview of conventional methane activation mechanisms and delineates the complete pathways of methane conversion in electrolysis contexts. Based on surface/interface chemistry, this work systematically analyzes proposed reaction pathways and corresponding strategies to enhance ECM efficiency towards various target products, including syngas, hydrocarbons, oxygenates, and advanced carbon materials. The discussion also encompasses opportunities and challenges for the ECM process, including insights into ECM pathways, rational electrocatalyst design, establishment of benchmarking protocols, electrolyte engineering, enhancement of CH4conversion rates, and minimization of CO2emission.

关键词： Methane Electrochemical conversion Reaction mechanism Catalyst design Electrode Electrocatalysis

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Synergistically enhanced ORR and HER performance on Co-N-C coupled in-situ generated PtCo intermetallic

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Journal of Energy Chemistry 2025年第1期100卷 721-729页

作者： Guanyu Luo Min song Lulu An xiao Huang Qian Zhang Chenhao Zhang Tao Shen Shuang Wang Deli Wang Key Laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology) Ministry of Education School of Chemistry and Chemical Engineering Huazhong University of Science and Technology

Integrating multi-scale sites in a composite catalyst is vital to realize efficient ***,a synergistic composite catalyst consisting of Co atomic sites and in-situ generated PtCo intermetallic compounds （IMCs）(o-PtCo@CoNC) is proposed through Co pre-anchoring and subsequent impregnation-reduction *** loading of Co atoms provides a chance for in-situ generating PtCo ordered intermetallic *** remaining Co single atoms and PtCo IMCs construct synergistic electrocatalytic *** from the ordered structure,synergistic effect of Pt Co IMCs and Co single atoms,o-PtCo@CoNC exhibits excellent electrocatalytic performance for oxygen reduction reaction （ORR） and hydrogen evolution reaction （HER） with mass activity of 1.21 A mgPt-1（at 0.9 V） and5.70 A mgPt-1（at an overpotential of 100 mV）,***,o-PtCo@CoNC delivers negligible loss of half-wave potential and overpotential during long-term stability test in acid solutions,with 13 mV decay after 50,000 potential cycles for ORR and a 2.7 mV decay after 20,000 potential cycles for *** integration strategy of single-atomic sites coupled IMCs paves the way for enhancing the activity and durability of Pt-based electrocatalysts.

关键词： Electrolytic reduction

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铜钼矿冶炼过程铼的行为研究与工业应用实践

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有色金属（冶炼部分） 2017年第6期 45-52页

作者：党晓娥孟裕松王璐宋永辉西安建筑科技大学陕西省黄金与资源重点实验室西安710055

在分析冶炼过程辉钼矿铜矿中伴生铼在物相变化以及分布的基础上,详细介绍了含铼料液、料渣中铼回收的方法及其原理与工艺,并对各回收方法做了简要评述,提出今后铼回收研究的主要方向。

关键词：铜钼矿铼行为方法原理与工艺

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Passive activity enhances residual control ability in patients with complete spinal cord injury

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Neural Regeneration Research 2025年第8期20卷 2337-2347页

作者： Yanqing xiao Mingming Gao Zejia He Jia Zheng Hongming Bai Jia-Sheng Rao Guiyun song Wei song xiaoguang Li Beijing Key Laboratory for Biomaterials and Neural Regeneration Beijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijingChina Department of Rehabilitation Evaluation China Rehabilitation Research CenterBeijingChina Cardiac Center Beijing Children’s HospitalCapital Medical UniversityBeijingChina The State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijingChina Department of Rehabilitation Engineering China Rehabilitation Science InstituteBeijingChina

Patients with complete spinal cord injury retain the potential for volitional muscle activity in muscles located below the spinal injury ***,because of prolonged inactivity,initial attempts to activate these muscles may not effectively engage any of the remaining neurons in the descending pathway.A previous study unexpectedly found that a brief clinical round of passive activity significantly increased volitional muscle activation,as measured by surface *** this study,we further explored the effect of passive activity on surface electromyographic signals during volitional control tasks among individuals with complete spinal cord *** patients with chronic complete thoracic spinal cord injury were *** electromyography data from eight major leg muscles were acquired and compared before and after the passive activity *** results indicated that the passive activity led to an increased number of activated volitional muscles and an increased frequency of *** the cumulative root mean square of surface electromyography amplitude for volitional control of movement showed a slight increase after passive activity,the difference was not statistically *** findings suggest that brief passive activity may enhance the ability to initiate volitional muscle activity during surface electromyography tasks and underscore the potential of passive activity for improving residual motor control among patients with motor complete spinal cord injury.

关键词： complete spinal cord injury cycle training epidural electrical stimulation motor training passive activity physiological state spinal cord circuit surface electromyography volitional control task

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改进的遗传算法在矿井阵列天线中的应用

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煤矿机械 2013年第3期34卷 218-220页

作者：孟小嵩刘卫东张净中国矿业大学信息与电气工程学院江苏徐州221008 兖州煤业股份有限公司兴隆庄煤矿山东兖州272102

由于矿井下无线电波存在大量的反射、折射、散射波,导致严重的多径。如此之多的干扰信号容易导致近亲繁殖等现象,更重要的是几乎不可能使天线方向图的干扰方向都形成零陷。针对这些问题,提出GA-I算法使遗传算法能运用于矿井下的阵列天线... 详细信息

由于矿井下无线电波存在大量的反射、折射、散射波,导致严重的多径。如此之多的干扰信号容易导致近亲繁殖等现象,更重要的是几乎不可能使天线方向图的干扰方向都形成零陷。针对这些问题,提出GA-I算法使遗传算法能运用于矿井下的阵列天线,主要通过在交叉过程中判断个体相似度来改进近亲繁殖现象和通过改进适应度函数来解决了因为信号干扰数大于天线阵列数的情况而使干扰方向形成了零陷。MATLAB仿真表明了此算法的有效性,形成的波束图获得了很好的结果。

关键词：煤矿井下阵列天线遗传算法 GA—I

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基于因子分析的财务预警模型构建

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杭州电子科技大学学报（社会科学版） 2017年第3期13卷 9-15页

作者：孟晓俊宋楠杭州电子科技大学会计学院浙江杭州310018 杭州电子科技大学卓越学院浙江杭州310018

笔者提出了基于因子分析的财务预警建模方法,该种方法不仅实现指标的降维,而且能对公共因子的经济意义进行解释。通过对制造业企业的实证研究,本文构建了财务预警模型,并能够从六个维度对企业财务危机的产生原因进行分析,进而利于企业... 详细信息

笔者提出了基于因子分析的财务预警建模方法,该种方法不仅实现指标的降维,而且能对公共因子的经济意义进行解释。通过对制造业企业的实证研究,本文构建了财务预警模型,并能够从六个维度对企业财务危机的产生原因进行分析,进而利于企业制定应对措施。此外,对于不同的主体,误拒与误受两类误判的代价差异较大,但大部分研究都忽略了这一点。因此笔者在模型中引入了误判代价,并对误判代价进行稳健性分析,也为进一步的财务预警研究提供新思路。

关键词：财务预警因子分析指标降维误判代价

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基于WSNs矿山设备振动监测的时间同步算法研究

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传感器与微系统 2013年第2期32卷 30-32,35页

作者：张净孟小嵩王刚胡兵朱中波中国矿业大学物联网研究中心信息与电气工程学院江苏徐州221008

以无线传感器网络(WSNs)在矿山机械设备健康感知中的特殊应用为背景,研究了煤矿生产环境下需要的特殊感知网络结构,并构建WSNs的树形采集网络模型。在构建的模型下研究参考广播同步(RBS)算法。针对现有算法在建立时间同步时能耗较大和... 详细信息

以无线传感器网络(WSNs)在矿山机械设备健康感知中的特殊应用为背景,研究了煤矿生产环境下需要的特殊感知网络结构,并构建WSNs的树形采集网络模型。在构建的模型下研究参考广播同步(RBS)算法。针对现有算法在建立时间同步时能耗较大和同步收敛时间长的问题,提出了改进的RBS(IRBS)算法。仿真分析发现改进算法能明显减少同步过程中的能量消耗和同步收敛时间。

关键词：无线传感器网络时间同步算法参考广播同步设备感知数据采集

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