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公路工程发包人供应骨料滞后导致的补偿分析

云南水力发电 2024年第S1期40卷 102-104页

作者：阙清华李良峰汤荣平曾海军华能澜沧江水电股份有限公司云南昆明650224

公路工程行业发包人推迟供应材料的现象较普遍,但供应材料滞后导致的费用补偿具体方法较少。从法律、法规角度分析发包人供应材料滞后补偿的法律依据,从招投标文件等角度分析发包人供应材料滞后补偿的合同依据,进而分析发包人供应材料... 详细信息

公路工程行业发包人推迟供应材料的现象较普遍,但供应材料滞后导致的费用补偿具体方法较少。从法律、法规角度分析发包人供应材料滞后补偿的法律依据,从招投标文件等角度分析发包人供应材料滞后补偿的合同依据,进而分析发包人供应材料滞后的原理,即补偿成立的基础;分析几种类型的补偿处理原则、费用计算方法以及优缺点,提出建议。

关键词：公路工程发包人供应骨料滞后

NUMERICAL SIMULATION OF WET STEAM CONDENSING FLOW WITH AN EULERIAN/EULERIAN MODEL

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Chinese Journal of Mechanical Engineering 2003年第2期16卷 156-159页

作者： li liangfeng Zhenpingli GuojunState Key Laboratory of Multiphase Flowin Power Engineering,Xi’ an Jiaotong University,XI’ an 710049, China Xi' an Jiaotong University State Key Laboratory of Multiphase Flow in Power Engineering Xi'an 710049

Wet steam condensing flow in low-pressure steam turbine leads to efficiencylosses and blade erosions. In order to investigate this problem by numerical approach, anEulerian/Eulerian model has been developed, in which the wet steam is regarded as mixture comprisingtwo coupled systems: the vapor phase and the liquid phase. These two systems are both described byconservation equations. High resolution TVD scheme is employed to capture condensing phenomena inwet steam flow. This model has been validated by numerical simulations of condensing flows in 1D and2D nozzles. Compared with experimental data, a good agreement is observed. This Eulerian/Eulerianmodel can be extended to 3D calculation of condensing flow.

关键词： wet steam condensing flow numerical simulation eulerian/eulerian model

Effects of rare earth La on the microstructure and melting property of(Ag-Cu_(28))-30Sn alloys prepared by mechanical alloying

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Rare Metals 2011年第1期30卷 49-52页

作者： li liangfeng QIU Tai YANG Jian FENG Yongbao State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials Southwest University of Science and Technology Mianyang 621010 China College of Materials Science and Engineering Nanjing University of Technology Nanjing 210009 China

To obtain novel intermediate temperature alloy solders with a melting temperature of 400-600°C,nominal（Ag-Cu28）-30Sn alloys without or with a trace addition（0.5 or 1.0 wt.%） of rare earth（RE） element La were prepared by mechanical *** aim of this research is to investigate the effects of the addition of La on the microstructures,alloying process and melting properties of（Ag-Cu28）-30Sn *** results show that the addition of La produces no new phase.A trace amount of La addition can effectively refine the grain size,but the excessive addition of 1.0 wt.% La inhibits the alloying *** influence of La on the melting temperatures of solder alloys is ***,the trace addition of 0.5 wt.% La can distinctly reduce the fusion zone and improve the melting property of（Ag-Cu28）-30Sn alloys.

关键词： solders rare earths mechanical alloying microstructure melting

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外包钢加固石梁试验研究和理论分析

建筑结构 2017年第21期47卷 100-104页

作者：李梁峰福建省建筑科学研究院福州350025 福建省绿色建筑技术重点实验室福州350025

对采用外包钢加固的石梁进行了正截面受弯承载力试验,分析了其受弯性能及其破坏特点。试验结果表明:外包钢加固法能提高石梁的抗弯承载力,改善其受弯性能;角钢锚固是石梁加固过程中的关键因素,对加固梁的承载力和延性性能有很大的影响... 详细信息

对采用外包钢加固的石梁进行了正截面受弯承载力试验,分析了其受弯性能及其破坏特点。试验结果表明:外包钢加固法能提高石梁的抗弯承载力,改善其受弯性能;角钢锚固是石梁加固过程中的关键因素,对加固梁的承载力和延性性能有很大的影响。对加固梁的受弯承载力进行了理论分析,并提出了实用计算公式。

关键词：石结构石梁外包钢加固弯曲试验

稀土La对(Ag-Cu_(28))-25Sn-xLa合金微观结构及凝固机制的影响

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稀有金属 2012年第3期36卷 385-389页

作者：李良锋马雪丘泰西南科技大学材料科学与工程学院四川绵阳621010 南京工业大学材料科学与工程学院江苏南京210009

研究了稀土La对(Ag-Cu28)-25Sn-xLa合金微观结构的影响,并探讨了稀土La含量的变化在其凝固过程中的作用。采用高频感应加热熔炼,经水淬制得(Ag-Cu28)-25Sn-xLa合金。通过XRD,SEM,EDS等分析手段,研究了合金的物相组成、凝固组织及元素分... 详细信息

研究了稀土La对(Ag-Cu28)-25Sn-xLa合金微观结构的影响,并探讨了稀土La含量的变化在其凝固过程中的作用。采用高频感应加热熔炼,经水淬制得(Ag-Cu28)-25Sn-xLa合金。通过XRD,SEM,EDS等分析手段,研究了合金的物相组成、凝固组织及元素分布情况。研究结果表明:微量的稀土La足以改变(Ag-Cu28)-25Sn合金的凝固过程;La含量不大于0.5%时,合金的物相组成为Ag3Sn,Cu3Sn和Cu6Sn5相;当La含量不小于1.0%(质量分数)时,合金的物相组成为Ag3Sn和Cu3Sn;同时,随La含量的增加合金的凝固组织不断细化,且有利于Ag(Sn)固溶体初生相的析出。

关键词： (Ag-Cu28)-25Sn合金稀土La 凝固组织

纳米Ag-Cu-In-Sn合金粉末的制备及其热分析

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稀有金属材料与工程 2008年第2期37卷 330-333页

作者：颜秀文丘泰李良峰张振忠中国电子科技集团公司第四十八研究所湖南长沙410111 南京工业大学江苏南京210009

利用直流电弧等离子体法成功制备了分散性较好的纳米链状Ag-Cu-In-Sn合金粉末。用X射线衍射(XRD)、透射电镜(TEM)和差示扫描量热分析(DSC)等手段对粉末的结构、粒度和热性能进行了表征。研究结果表明:通过优化工艺可制备粒度分布均匀,... 详细信息

利用直流电弧等离子体法成功制备了分散性较好的纳米链状Ag-Cu-In-Sn合金粉末。用X射线衍射(XRD)、透射电镜(TEM)和差示扫描量热分析(DSC)等手段对粉末的结构、粒度和热性能进行了表征。研究结果表明:通过优化工艺可制备粒度分布均匀,产率较高,平均粒度在45.03nm的Ag-Cu-In-Sn合金粉末。该粉末具有独特的热性能,与微米合金粉末的熔点相比,其熔点下降了近160℃。

关键词： Ag-Cu-In-Sn 热分析直流电弧等离子体

Shenqi Fuzheng injection alleviates chemotherapy-induced cachexia by restoring glucocorticoid signaling in hypothalamus

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Journal of Pharmaceutical Analysis 2024年第3期14卷 431-434页

作者： Entezar Berik Zijia Zhang Wei li Yawen liu Sihan Chen Wenyong Wu Zhaojun Wang Xinqin Kong Wenqiang Pei Huiqing Dong Huali Long Min Lei Jennifer Yiyang Wang liangfeng liu Jinjun Hou Jing Feng Zhaoxia li Wanying Wu De-an Guo Beijing Key Lab of TCM Collateral Disease Theory Research School of Traditional Chinese MedicineCapital Medical UniversityBeijing100069China National Engineering Research Center of TCM Standardization Technology Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai201203China University of Chinese Academy of Sciences Beijing100049China School of Chinese Materia Medica Nanjing University of Chinese MedicineNanjing210029China limin Pharmaceutical Factory Livzon Group LimitedShaoguanGuangdong512028China Guangdong Corporate Key Laboratory of High-End liquid Medicine R&D IndustrilizationShaoguanGuangdong512028China Center for Neurological and Psychiatric Research and Drug Discovery Shanghai Institute of Materia MedicaChinese Academy of ScienceShanghai201203China

Chemotherapy-induced cachexia(CIC)is a debilitating condition characterized by weight loss,muscle atrophy,and anorexia[1].While peripheral mechanisms of cachexia have been extensively studied,the involvement of the central nervous system(CNS)in CIC is often *** drugs cause stress responses and inflammation,which may impact the hypothalamus and disrupt systemic energy and neuroendocrine *** hypothalamic roles in regulating these processes can provide insights into CIC's mechanisms and aid in developing novel therapies.

关键词： injection drugs glucocorticoid chemotherapy

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大民屯凹陷构造裂缝的综合定量预测

新疆石油地质 2014年第5期35卷 566-569页

作者：李春林王蕾李良峰辽宁工程技术大学力学与工程学院辽宁阜新123000 中国石油大港油田分公司滩海开发公司天津300280

为定量预测大民屯凹陷储集层的裂缝分布规律,在分析区域构造应力场特征的基础上,用有限元法理论,建立了该研究区的地质、力学模型。通过三维构造应力场的模拟分析,给出了古潜山太古界储集层的第一主应力、第二主应力、第三主应力和最大... 详细信息

为定量预测大民屯凹陷储集层的裂缝分布规律,在分析区域构造应力场特征的基础上,用有限元法理论,建立了该研究区的地质、力学模型。通过三维构造应力场的模拟分析,给出了古潜山太古界储集层的第一主应力、第二主应力、第三主应力和最大剪应力分布图。根据破裂值和能量值2个评价指标得出了裂缝发育指数,用裂缝发育指数预测的裂缝发育密度与已钻井岩心裂缝统计密度有较好的吻合性,与单一的评价指标相比,提高了裂缝预测的准确度。

关键词：辽河油田大民屯凹陷储集层裂缝三维构造应力场裂缝预测裂缝密度

Additives strategies to improving cycling stability of li metal batteries by modifying electrode electrolyte interphases

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Progress in Natural Science:Materials International 2024年第2期34卷 338-344页

作者： Yuan li Pengfei Huang Chunyu Cui Xiaoyuan Ma li Chen Zekun li linhai li Yuhong Tian School of Biological and Chemical Engineering Guangxi University of Science and Technology School of College of Chemistry and Chemical Engineering Hunan University Isky Future Energy Institute

li metal batteries（LMBs） have attracted much attention due to the ultra-high theoretical capacity of the li metal anode（LMA）.However,the uncontrollable dendrites growth and low coulombic efficiency hinder their practical ***,we explore 3,5-difluoropyridine（2F-BD） as a novel electrolyte additive to enable highperformance *** 2F-BD additive participates in and modifies the solvation structure of li ions by reducing the coordinated number of PF6-at the electrode surface,leading to the formation of a liF and li3N-rich solid electrolyte interphase（SEI）.The liF component increases the robustness of SEI and suppresses the formation of li dendrites,while the li3N component facilitates the transportation and reaction kinetics of li *** a result,the li‖li symmetric cell presents a stable cycling performance of up to 500 h at a current density of 1 mA *** coupling with liFePO4cathode,the obtained full cell achieves high specific capacities of 106.06 mA h g-1and 84.98 mA h g-1at 2.55 mA cm-2and 5.10 mA cm-2,respectively,and maintains a high capacity retention of84.0% after 1000 cycles at 0.13 mA cm-2,with an average cycling CE of 99.58%.

关键词： li metal batteries li dendrites Electrolyte additive