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Effect of different metal element substitution on microstructural and comprehensive hydrogen storage performance of Ti0.9Zr0.1Mn0.95Cr0.7V0.2M0.15（M=Fe,Co,Ni,Cu,Mo） alloy

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Progress in Natural Science:Materials International 2024年第2期34卷 304-313页

作者： Baojia Ni jianhui Zhu Guo Yang Linhua Xu Haiyan Leng Wei Liu Taijun Pan Xingbo Han Lijun lv School of Materials Science and Engineering Changzhou University Shanghai Institute of Applied Physics Chinese Academy of Sciences School of Materials Science and Engineering Shanghai University

Hydrogen is now being used as a renewable clean energy carrier.One of the main issues with the application of hydrogen energy is a shortage of security and efficient hydrogen storage technology.TiMn-based alloys are considered promising hydrogen storage materials,but their comprehensive hydrogen storage properties and cyclic stable performance limit their further practical application.The hydrogen storage properties of alloys can be enhanced by substituting transition metal elements.Therefore,the comprehensive hydrogen storage performance of the Ti0.9Zr0.1Mn0.95Cr0.7V0.2M0.15（M=Fe,Co,Ni,Cu,Mo） alloys was systematically investigated according to the Mn element on the B side is partially replaced by variety of transition metal elements.The M=Ni alloy,which showed the highest hydrogen storage capacity among the group of alloys,was used to explore cycle stability.The plateau pressures of the series alloys decreased in order,Fe>Co>Ni>Cu>Mo.Aspects of hydrogen absorption kinetics,all of the alloys can reach full hydrogen absorption saturation within 400 s at 303 K.The Ti0.9Zr0.1Mn0.95Cr0.7V0.2Mo0.15alloy possessed the fastest hydrogen absorption kinetic rate(t0.9=65 s) and the smallest hysteresis factor.This suggests that the substitution of Mo elements is effective in improving the hysteresis of the Laves phase alloys.Among the series of alloys,the M=Ni alloy exhibited the best overall hydrogen storage performance,which hydrogen storage capacity can reach 1.81 wt% and 97% of its capacity is kept after 100 cycles.

关键词： Cyclic stable performance Element substitution Hydrogen storage properties Laves phase TiMn-Based hydrogen storage alloy

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Guest editorial: AI and edge computing driven technologies and applications

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Digital Communications and Networks 2023年第2期9卷 448-449页

作者： jianhui lv Yuhui Shi Hui Cheng Zhiwei Lin Lianbo Ma Peng Cheng Laboratory China Southern University of Science and Technology China University of Hertfordshire UK Queen's University Belfast UK Northeastern University China

1.Introduction Emerging networking paradigms,including Information-Centric Networking(ICN)[1],Software-Defined Networking(SDN)[2],Mobile Satellite Communication Networks(MSCN)[3],and Internet of Vehicles(IoV)[4],have faced some severe challenges.For example,the dynamic network environment makes it very hard to optimize resource allocation.In addition,these networking paradigms usually have heterogeneous features,making it difficult to schedule traffic among different kinds of networks.These challenges can be addressed by the adaptive learning of Artificial Intelligence(AI)[5,6]and the edge caching of edge computing.AI can also help establish a relatively optimal routing strategy and perform congestion control by learning the dynamic network state.Just like AI,edge computing[7–10]can help provide fast response to users,and deploy edge servers with strong computing and storage capabilities can greatly improve the performance of 4K/8K and VR/AR.However,despite their ability to improve network performance,there are still many challenges.For example,the integrated architectures and frameworks need to be clearly identified,and the related protocols need to be better defined.

关键词： network computing edge

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MRI评估髋关节大转子疼痛综合征治疗效果作用分析

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潍坊医学院学报 2024年第2期46卷 136-138页

作者：尹青梅郭行吕建辉烟台市莱阳中心医院疼痛科山东烟台265200 烟台市莱阳中心医院放射科烟台市莱阳中心医院放疗科

目的探讨MRI扫描对髋关节大转子疼痛综合征患者疗效的评估作用。方法回顾性分析2022年1月~2023年3月在我院就诊的45例大转子疼痛综合征患者治疗前后的临床与影像资料。临床资料包括:患者的疼痛时间、疼痛位置、治疗后疼痛有无缓解、... 详细信息

目的探讨MRI扫描对髋关节大转子疼痛综合征患者疗效的评估作用。方法回顾性分析2022年1月~2023年3月在我院就诊的45例大转子疼痛综合征患者治疗前后的临床与影像资料。临床资料包括:患者的疼痛时间、疼痛位置、治疗后疼痛有无缓解、治疗前后患者的髋关节Harris评分;影像资料包括治疗前后患者髋关节大转子周围水肿范围。统计并分析上述临床信息与影像资料的相关性与差异性,其中采用Spearman相关进行疼痛时间、治疗前大转子周围水肿范围、Harris评分的相关性分析,采用配对样本t检验进行治疗前后水肿范围及Harris评分的差异性分析。结果患者的疼痛时间与治疗前大转子周围水肿范围及治疗前患者Harris评分无相关性(P>0.05);治疗前大转子周围水肿范围与治疗前髋关节Harris评分无相关性(P>0.05)。治疗前后水肿范围大小及治疗前后患者Harris评分比较,差异有统计学意义(P<0.05),t值分别为6.827、-15.952。结论 MRI扫描通过测量、对比GTPS患者治疗前后大转子周围水肿的范围,可以作为一种有效的评估方式,为临床GTPS患者疗效的评价提供有价值的参考。

关键词： MR 大转子疼痛综合征 Harris评分大转子滑囊炎

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A new estimation method and an anisotropy index for the deformation modulus of jointed rock masses

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第1期14卷 153-168页

作者： Bohu Zhang Junyan Mu Jun Zheng Qing lv jianhui Deng State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China School of Geoscience and Technology Southwest Petroleum UniversityChengdu610500China Department of Civil Engineering Zhejiang UniversityHangzhou310058China Center for Balance Architecture Zhejiang UniversityHangzhou310007China State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065China

The deformation modulus of a rock mass is an important parameter to describe its mechanical behavior.In this study,an analytical method is developed to determine the deformation modulus of jointed rock masses,which considers the mechanical properties of intact rocks and joints based on the superposition principle.Due to incorporating the variations in the orientations and sizes of joint sets,the proposed method is applicable to the rock mass with persistent and parallel joints as well as that with nonpersistent and nonparallel joints.In addition,an anisotropy index AIdmfor the deformation modulus is defined to quantitatively describe the anisotropy of rock masses.The range of AIdmis from 0 to 1,and the more anisotropic the rock mass is,the larger the value of AIdmwill be.To evaluate the proposed method,20 groups of numerical experiments are conducted with the universal distinct element code(UDEC).For each experimental group,the deformation modulus in 24 directions are obtained by UDEC(numerical value)and the proposed method(predicted value),and then the mean error rates are calculated.Note that the mean error rate is the mean value of the error rates of the deformation modulus in 24 directions,where for each direction,the error rate is equal to the ratio of numerical value minus predicted value to the numerical value.The results show that(i)for different experimental groups,the mean error rates vary between 5.06%and 22.03%;(ii)the error rates for the discrete fracture networks(DFNs)with two sets of joints are at the same level as those with one set of joints;and(iii)therefore,the proposed method for estimating the deformation modulus of jointed rock masses is valid.

关键词： Deformation modulus Analytical method Anisotropy index Jointed rock masses Mechanical behavior Discrete fracture network(DFN)

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A universal elliptical disc(UED)model to represent natural rock fractures

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International Journal of Mining Science and Technology 2022年第2期32卷 261-270页

作者： Jun Zheng Jichao Guo Jiongchao Wang Honglei Sun jianhui Deng Qing lv Department of Civil Engineering Zhejiang UniversityHangzhou 310058China Center for Balance Architecture Zhejiang UniversityHangzhou 310007China College of Civil Engineering Zhejiang University of TechnologyHangzhou 310023China State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource&HydropowerSichuan UniversityChengdu 610065China

Since natural fractures are often non-equidimensional,the circular disc model still has great limitations.By contrast,the elliptical disc model is more applicable to representing natural fractures,especially for slender ones.This paper developed a universal elliptical disc(UED)model by incorporating the center point,size,and azimuth of fractures as variables.Specifically,with respect to the azimuth of elliptical fractures in three-dimensional(3D)space,we proposed a paradigm to construct its probability density function(PDF)by coupling the orientation and rotation angle of long axis based on three coordinate transformations.To illustrate the construction process of the PDF of the fracture azimuth,we took the orientation following the Fisher distribution and the rotation angle following Von Mises distribution as an example.A rock slope is used to show the use of the developed UED model,and the 3D DFNs for the slope rock mass are generated by Monte Carlo simulation.In addition,the DFNs for the rock mass are also generated based on the existing circular disc model and non-universal elliptical disc model.The comparison results from the three models clearly illustrate the superiority of the UED model over the existing circular and non-universal elliptical disc models.

关键词： Discrete fracture networks Rock mass Discontinuity Elliptical disc model Fisher distribution Monte Carlo simulation

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An Algorithm of 0-1 Knapsack Problem Based on Economic Model

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Journal of Applied Mathematics and Physics 2013年第4期1卷 31-35页

作者： Yingying Tian jianhui lv Liang Zheng College of Information Science and Engineering Northeastern University Shenyang 110819 China School of Information Science and Technology Sun Yat-sen University Guangzhou 510006 China

In order to optimize the knapsack problem further, this paper proposes an innovative model based on dynamic expectation efficiency, and establishes a new optimization algorithm of 0-1 knapsack problem after analysis and research. Through analyzing the study of 30 groups of 0-1 knapsack problem from discrete coefficient of the data, we can find that dynamic expectation model can solve the following two types of knapsack problem. Compared to artificial glowworm swam algorithm, the convergence speed of this algorithm is ten times as fast as that of artificial glowworm swam algorithm, and the storage space of this algorithm is one quarter that of artificial glowworm swam algorithm. To sum up, it can be widely used in practical problems.

关键词： 0-1 Knapsack Economic Model Optimization Algorithm Storage Space

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Effect of SiO_(2) nano film deposited on copper and aluminium electrodes on the power frequency breakdown voltage of SF_(6) gas

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High Voltage 2023年第4期8卷 791-798页

作者： Yu Zheng Shengle Gong Lei Liu Zhihui Xiang Yichen lv jianhui Yu Wenjun Zhou School of Electrical Engineering and Automation Wuhan UniversityWuhanChina State Key Laboratory of HVDC Transmissions Technology China Southern Power GridGuangzhouChina

In order to reveal the effect of insulating nano film on the insulation strength of SF_(6) gas gap,SiO_(2) nano film was deposited on the electrode surface by the plasma-enhanced chemical vapour deposition technique.The power frequency breakdown characteristics of SF_(6) gas under Cu and Al electrodes were obtained before and after coating.The results showed that when the Cu electrode was coated,the breakdown voltage was up to at most 11.5% higher than that of an uncoated Cu electrode in the pressure range of 0.2-0.5 MPa.When the Al electrode was coated,the breakdown voltage of SF_(6) gas was lower than that of an uncoated one in the pressure range of 0.2-0.5 MPa.The breakdown voltage of SF_(6) gas under the Cu electrode was slightly lower than that under the Al electrode,but the breakdown voltages under the coated Cu electrode were significantly higher than that under the coated Al electrode.Through SEM tests,it was found that the surface roughness of the electrode decreases after coating,but particles were formed on the surface of the Al electrode.The content of metal fluoride formed on the coated Al electrode under multiple breakdowns was significantly higher than that on the coated Cu electrode.The research results could provide references for improving insulation performance of GIS equipment.

关键词： coating electrode film

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热轧高强钢带卷板形质量控制

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河北冶金 2024年第2期 68-73页

作者：李军明卢岳师可新吕晓虎栗建辉河钢集团唐钢公司河北唐山063000 河钢材料技术研究院河北石家庄050023

河钢集团唐钢公司所产热卷板形缺陷多以带卷双侧浪及板形翘曲为主,严重影响了下游用户开平质量、激光落料等质量控制的稳定及生产效率的提升。本文从带钢肋部(距带钢边部100 mm位置)与边部温差控制、热轧工艺参数设定及层冷工艺选用、... 详细信息

河钢集团唐钢公司所产热卷板形缺陷多以带卷双侧浪及板形翘曲为主,严重影响了下游用户开平质量、激光落料等质量控制的稳定及生产效率的提升。本文从带钢肋部(距带钢边部100 mm位置)与边部温差控制、热轧工艺参数设定及层冷工艺选用、带钢两侧侧喷开启等方面分析了热轧高强钢板卷DS侧边浪产生的原因,并给出了减小热轧带钢内应力的措施。发现,带钢边部温度较带钢肋部温度低约50~90℃不等,此区域带钢处于热传递最大区域,带钢向外传递出去的热量最多,故该区域温度呈急剧下降趋势,温度变化大,是带钢最终板形产生边浪的主因;热轧带钢肋部与边部温差与定宽机减宽量及终轧温度有关,200~250 mm的定宽量较50~100 mm的定宽量带钢边部温降可减少约20℃,终轧温度由895℃降到885℃,带钢的肋部与边部的温差可减小约10~20℃;而层冷工艺的选择应根据精轧出口带钢横断面温差,结合各钢种、规格在冷却过程中带中与带边组织及晶粒均匀性实施综合考虑,以更好地控制热轧带卷板形质量。

关键词：热带板形横断面温差内应力层冷工艺定宽量终轧温度

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油气管道高速总线网络设备模型研究与实现

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中国仪器仪表 2024年第5期 27-32页

作者：黄忠胜黄易吕峰丁建辉张晓玲国家管网集团西部管道有限责任公司新疆乌鲁木齐830013 北京东土科技股份有限公司北京100144 沈阳工业大学辽宁沈阳110870

针对目前油气管道现场层网络通信带宽低、时延差及组网复杂的现状,以及油气管道智能化管理的需求,在油气管道现场层网络中引入IEC 61158 Type 28宽带现场总线国际标准技术,以提高数据通信的带宽和实时性,并实现多业务数据融合通信。根... 详细信息

针对目前油气管道现场层网络通信带宽低、时延差及组网复杂的现状,以及油气管道智能化管理的需求,在油气管道现场层网络中引入IEC 61158 Type 28宽带现场总线国际标准技术,以提高数据通信的带宽和实时性,并实现多业务数据融合通信。根据油气管道网络工程的实际应用,基于该宽带现场总线提出了一种新型的油气管道高速总线(PHB)标准技术,用于指导用户进行新型油气管道网络工程实施和业务部署。本文对PHB网络中的3种设备模型:主站、从站和代理,以及基于该设备模型的单环形和双环形总线网络模型等内容进行研究,并通过撬装平台验证了设备模型方案的可行性与可靠性。

关键词：宽带总线 PHB 设备模型代理

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Efficient Small-Molecule Organic Solar Cells by Modulating Fluorine Substitution Position of Donor Material

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Chinese Journal of Chemistry 2023年第7期41卷 755-762页

作者： Tao Zhang Qianglong lv Zhongxiang Peng Cunbin An Pengqing Bi Ye Xu Ni Yang Jingwen Wang Kaihu Xian Long Ye Shaoqing Zhang jianhui Hou State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190 China University of Chinese Academy of Sciences Beijing100049 China School of Materials Science&Engineering Tianjin Key Laboratory of Molecular Optoelectronic SciencesTianjin Universityand Collaborative Innovation Center of Chemical Science and EngineeringTianjin300350 China Beijing Key Laboratory for Optical Materials and Photonic Devices Department of ChemistryCapital Normal UniversityBeijing100048 China

Comprehensive Summary The fluorine substitution position in organic semiconductors is critical in improving device performance for organic solar cells(OSCs).Herein,two similar small-molecule donors,B3T-PoF and B3T-PmF,are designed and synthesized,which only differ on the fluorine substitution position on the pendent benzene unit.Although both small-molecule donors exhibit similar absorption profiles and molecular energy levels,B3T-PmF has stronger crystallinity and lower energetic disorder than B3T-PoF.After blending with the non-fullerene acceptor of BO-4Cl,B3T-PmF shows better phase separation and more ordered molecular packing in blend film.As a result,the B3T-PoF:BO-4Cl-based OSC shows a power conversion efficiency(PCE)of 12.3%.In contrast,the B3T-PmF:BO-4Cl-based cell demonstrates obviously increased JSC and FF values,thus yielding an excellent PCE of 14.7%.This study indicates that reasonable selection of fluorine atom substitution position in conjugated side chains is one of the promising strategies for achieving high-performance SM-DSCs.

关键词： Organic solar cell Small-molecule donor Fluorine substitution Morphology Miscibility

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