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Carbon Energy 2024年第9期6卷 29-38页

作者： Qianyan Wang Minsheng Wu Yunkai Xu Chuyue Li Yuanjia Rong Yaling Liao menglin gao Xiaoping Zhang Weirong Chen Jun Lu School of Electrical Engineering Southwest Jiaotong UniversityChengduChina College of Chemical and Biological Engineering Zhejiang UniversityHangzhouChina

Lithium metal shows a great advantage as the most promising anode for its unparalleled theoretical specific capacity and extremely low electrochemical ***,uncontrolled lithium dendrite growth and severe side reactions of the reactive intermediates and organic electrolytes still limit the broad application of lithium metal ***,we propose 4-nitrobenzenesulfonyl fluoride(NBSF)as an electrolyte additive for forming a stable organic-inorganic hybrid solid electrolyte interphase(SEI)layer on the lithium *** abundance of lithium fluoride and lithium nitride can guarantee the SEI layer's toughness and high ionic conductivity,achieving dendrite-free lithium ***,the phenyl group of NBSF significantly contributes to both the chemical stability of the SEI layer and the good adaptation to volume changes of the lithium *** lithium-oxygen batteries with NBSF exhibit prolonged cycle lives and excellent cycling *** simple approach is hoped to improve the development of the organic-inorganic SEI layer to stabilize the lithium anodes for lithium-oxygen batteries.

关键词： lithium anode lithium-oxygen batteries reactive oxygen species solid electrolyte interphase

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原位表征技术在锂氧气电池中的研究进展

储能科学与技术 2024年第4期13卷 1225-1238页

作者：张晓平容远嘉王潜雁高梦林廖亚玲吴民生庄鑫鑫黄中昱万美君陈维荣西南交通大学四川成都611756

锂氧气电池以其极高的能量密度受到了科研工作者们的广泛关注。然而,锂氧气电池存在金属锂负极稳定性差、充电过电位高等关键难题,使得电池循环寿命短、能量利用效率低,距离大规模应用还有很长一段距离。为了推动锂氧气电池的发展,越来... 详细信息

锂氧气电池以其极高的能量密度受到了科研工作者们的广泛关注。然而,锂氧气电池存在金属锂负极稳定性差、充电过电位高等关键难题,使得电池循环寿命短、能量利用效率低,距离大规模应用还有很长一段距离。为了推动锂氧气电池的发展,越来越多的先进原位表征手段用于研究锂氧气电池的机理和优化电池结构。先进的原位表征技术不仅可以用于获取电池的静态信息,同时能准确获取电池在循环过程中的动态电化学行为以及结构演变过程,对于推动锂氧气电池的发展有着重要意义。本文综述了近年来应用于锂氧气电池原位表征手段的相关研究进展,包括原位显微表征技术、原位X射线表征技术、原位质谱表征技术等。通过具体的研究案例,分析了各种原位表征技术的功能,总结了其在锂氧气电池领域里的具体应用场景,揭示了锂氧气电池更深层次的反应机理,并探讨和展望了未来锂氧气电池研究中需要的先进原位表征技术。

关键词：锂氧气电池原位表征反应机理

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油气长输管道应急抢险工程计价方式研究

建筑经济 2020年第9期41卷 60-63页

作者：高孟林中国石化天然气分公司河南濮阳457001

通过分析油气长输管道应急抢险非常态施工与常态施工的区别,以及现行计价依据和方式在应急抢险工程结算和审计过程中出现的纠纷和问题,针对性地提出定额修正计价和成本加超额累进比例费用计价两种解决方案。结论显示,在油气长输管道应... 详细信息

通过分析油气长输管道应急抢险非常态施工与常态施工的区别,以及现行计价依据和方式在应急抢险工程结算和审计过程中出现的纠纷和问题,针对性地提出定额修正计价和成本加超额累进比例费用计价两种解决方案。结论显示,在油气长输管道应急抢险施工中综合运用两种方案,能够有效适用其非常态施工具体情况,平衡建设单位和施工单位的期望和诉求,避免矛盾产生和长时间扯皮纠缠。

关键词：油气管道应急抢险计价方式定额合同

油气管网设施公平开放的内涵、现状、问题及路径探析

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天然气工业 2022年第10期42卷 123-130页

作者：高孟林黄丹杨启明国家管网集团工程技术创新有限公司

随着2019年国家石油天然气管网集团有限公司的成立,我国油气市场“X+1+X”的体系逐渐成型。为了建立公平、公正、竞争、有序的市场秩序,处于自然垄断地位的管网设施运营企业需要规范有效地实施油气管网设施的公平开放。为此,以油气管网... 详细信息

随着2019年国家石油天然气管网集团有限公司的成立,我国油气市场“X+1+X”的体系逐渐成型。为了建立公平、公正、竞争、有序的市场秩序,处于自然垄断地位的管网设施运营企业需要规范有效地实施油气管网设施的公平开放。为此,以油气管网设施公平开放问题为研究对象,深入分析了其内涵、现状及存在的问题,提出了油气管网设施公平开放的路径构想。研究结果表明:(1)总结了油气管网设施公平开放的时机条件、制度技术和政府监管等内涵要素,梳理了油气管网设施公平开放的政策演进历程,分析了公平接入、第三方准入和能力分配交易等执行现状。(2)指出了当前油气管网设施公平开放存在的5个方面的问题:法律制度配套建设尚不到位、业务分离尚不彻底、托运商准入管理仍需加强、运价体系适用性仍需提升、信息公开执行稍显混乱。(3)提出了进一步完善油气管网设施公平开放的6条建议,加快天然气领域制度完善;国家监管机构统一开展托运商准入管理;进一步丰富能力分配交易方式;建立适度集中统一的能力交易平台;探索独立监管体制,增强政府监管力量,提升政府监管力度;制定实施更能体现价值属性的差异化运价体系,与能力分配交易体系更相适应。结论认为,推进油气管网设施公平开放,对促进我国油气安全供应稳定,维护设施运营企业和用户的合法权益具有重要意义。

关键词：国家管网油气管网设施公平开放内涵交易监管政策路径

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基于GWO-KRG近似模型的乘员约束系统可靠性优化设计

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汽车工程 2021年第6期43卷 870-876,884页

作者：谷先广高梦琳王笑乐黄岳竹合肥工业大学汽车与交通工程学院合肥230009 合肥工业大学智能制造技术研究院合肥230009 太航常青汽车安全系统(苏州)股份有限公司苏州215100

为提升乘员约束系统安全性能,本文中将近似模型参数优化技术应用于约束系统可靠性优化设计中。首先建立某车型驾驶员侧约束系统仿真模型,并基于实车碰撞试验结果对仿真模型进行验证,然后采用灰狼优化(GWO)算法优化克里金(KRG)模型的相... 详细信息

为提升乘员约束系统安全性能,本文中将近似模型参数优化技术应用于约束系统可靠性优化设计中。首先建立某车型驾驶员侧约束系统仿真模型,并基于实车碰撞试验结果对仿真模型进行验证,然后采用灰狼优化(GWO)算法优化克里金(KRG)模型的相关参数,得到高精度的GWO-KRG近似模型。最后,基于GWO-KRG近似模型和可靠性优化方法对约束系统进行优化设计。结果表明:GWO-KRG近似模型能提供更准确的预测响应值;经可靠性优化后的约束系统安全性能得到提高的同时可靠性也得到保证。

关键词：乘员约束系统灰狼优化克里金近似模型可靠性优化设计

Record-high efficiency perovskite LEDs achieved by accelerating radiative recombination

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Science China Materials 2024年第9期67卷 3039-3040页

作者： Feng gao Department of Physics Chemistry and BiologyLinköping UniversityLinköping58183Sweden

Light-emitting diodes(LEDs)have revolutionized the lighting and displays due to their superior energy *** increasing demand for more efficient and brighter thin-film LEDs in flat-panel displays and solid-state lighting applications has driven extensive research into perovskite materials,which show great promise for high brightness and efficiency.

关键词： lighting radiative high

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光动力学疗法治疗皮肤癌及癌前病变

中华皮肤科杂志 1989年第2期22卷 110-112页

作者：王家璧高孟林等中国医学科学院协和医院皮肤科激光组

我们从1981年开始用血叶琳衍生物(H-pD)激光即光动力学疗法(PDT)治疗皮肤恶性肿瘤23例,现报道如下.

关键词：皮肤癌癌前病变光动力学疗法治疗

Stress tensor determination by modified hydraulic tests on pre-existing fractures:Method and stress constraints

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第5期16卷 1637-1648页

作者： Guiyun gao Chenghu Wang Ke gao National Institute of Natural Hazards Ministry of Emergency Management of ChinaBeijing100085China Beijing Engineering Research Center of Earthquake Observation Beijing100085China Key Laboratory of Compound and Chained Natural Hazards Dynamics Ministry of Emergency Management of ChinaBeijing100085China Department of Earth and Space Sciences Southern University of Science and TechnologyShenzhen518055China

The hydraulic testing of pre-existing fractures(HTPF)is one of the most promising in situ stress measurement methods,particularly for three-dimensional stress tensor ***,the stress tensor determination based on the HTPF method requires at least six tests or a minimum of 14-15 tests(under different conditions)for reliable *** this study,we modified the HTPF method by considering the shear stress on each pre-existing fracture,which increased the number of equations for the stress tensor determination and decreased the number of tests *** shear stresses were attributed to different fractures by random sampling;therefore,the stress tensors were obtained by searching for the optimal solution using the least squares criterion based on the Monte Carlo ***,we constrained the stress tensor based on the tensile strength criterion,compressive strength criterion,and vertical stress *** inverted stress tensors were presented and analyzed based on the tensorial nature of the stress using the Euclidean mean stress *** stress-measurement campaigns in Weifang(Shandong Province,China)and Mercantour road tunnel(France)were implemented to highlight the validity and efficiency of the modified HTPF(M-HTPF)*** results showed that the M-HTPF method can be applied for stress tensor inversion using only three to four tests on pre-existing fractures,neglecting the stress *** inversion results were confined to relatively small distribution dispersions and were significantly reliable and stable due to the shear stresses on the fractures and the stress constraints *** M-HTPF method is highly feasible and efficient for complete stress tensor determination in a single borehole.

关键词： Stress tensor Hydraulic tests on pre-existing fractures Mean stress Stress constraint Hydraulic fracturing

Thermal and mechanical behavior of casting copper alloy wheel during wheel and belt continuous casting process

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China Foundry 2024年第1期21卷 82-90页

作者： Kun gao Yan Peng School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004HebeiChina

To investigate the thermal and mechanical behavior of casting wheel,a two-dimensional thermoelastic-plastic finite element model was used to predict the temperature,stress and distortion distribution of the casting wheel during the wheel and belt continuous casting *** effects of grinding thickness and casting speed on the thermal and mechanical behaviors of the center of the hot face of the casting wheel were discussed in *** each rotation,the casting wheel passes through four different spray *** results show that the temperature distribution of the casting wheel in different spray zones is similar,the temperature of the hot face is the highest and the temperature reaches the peak in the spray zoneⅢ.The stress and distortion depend on the temperature distribution,and the maximum stress and distortion of the hot face are 358.2 MPa and 1.82 mm,*** temperature at the center of the hot face decreases with increasing grinding thickness and increases with increasing casting speed.

关键词： casting wheel finite element model grinding thickness casting speed hot face spray zones

Numerical simulation of fluid flow and free surface fluctuations during wheel and belt casting process

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Journal of Iron and Steel Research International 2024年第5期31卷 1117-1126页

作者： Kun gao Yan Peng National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan UniversityQinhuangdao066004HebeiChina

The unstable fluid flow and severe free surface fluctuations in the wheel and belt caster can affect the quality of the cast *** lower level height tends to entrap inclusions in the molten *** the other hand,the higher level height makes the production process more dangerous due to the overflow of high temperature fluid from the mold.A computational model of the molten metal pouring process was *** transient fluid flow and free surface fluctuations behavior were calculated using the three-dimensional large eddy simulation model and the volume of fluid *** results show that the flow velocity of the main jet gradually decreases under the influence of the low kinetic energy fluid in the *** is an obvious oscillation in the tail of the jet,while the flow field is asymmetric in *** jet is closer to the inside radius side due to the Coanda effect,and there is a recirculation zone on the inside radius and the outside radius respectively,according to the 10 s time-averaged *** with the industrial observation and simulation results,the shape of the free surface is a wave that varies with *** addition,the free surface height is lowest and the flow velocity is highest in the region near the jet.

关键词： Fluid flow Free surface Wheel and belt caster Large eddy simulation Volume of fluid method