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含遮蔽抛射沉积模型的有限尺寸效应

物理学报 2011年第3期60卷 760-766页

作者：郝大鹏唐刚夏辉韩奎寻之朋中国矿业大学物理系徐州221116

含遮蔽抛射沉积模型是在抛射沉积(BD)模型的基础上考虑了粒子以一定的角度分布倾斜入射的情况.本文应用外推方法确定了大尺寸极限下含遮蔽抛射沉积模型的各标度指数,讨论了该模型的有限尺寸效应及其标度性质.从模拟结果可以看出含遮蔽B... 详细信息

含遮蔽抛射沉积模型是在抛射沉积(BD)模型的基础上考虑了粒子以一定的角度分布倾斜入射的情况.本文应用外推方法确定了大尺寸极限下含遮蔽抛射沉积模型的各标度指数,讨论了该模型的有限尺寸效应及其标度性质.从模拟结果可以看出含遮蔽BD模型的有限尺寸效应与BD模型有所不同,遮蔽这种非局域作用可以显著地改变BD模型的标度性质.

关键词：遮蔽效应抛射沉积模型有限尺寸效应动力学标度

Heterostructural NiFeW disulfide and hydroxide dual‐trimetallic core‐shell nanosheets for synergistically effective water oxidatio

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Carbon Energy 2024年第8期6卷 192-204页

作者： peng‐Fei Guo Yang Yang Bing Zhu Qian‐Nan Yang Yan Jia Wei‐Tao Wang Zhao‐Tie Liu Shi‐Qiang Zhao xun Cui Key Laboratory of Chemical Additives for China National Light Industry College of Chemistry and Chemical EngineeringShaanxi University of Science and TechnologyXi'anChina School of Chemistry and Chemical Engineering Shaanxi Normal UniversityXi'anChina Key Laboratory of Carbon Materials of Zhejiang Province Wenzhou Key Lab of Advanced Energy Storage and ConversionZhejiang Province Key Lab of Leather EngineeringCollege of Chemistry and Materials EngineeringWenzhou UniversityWenzhouChina State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhanChina

A stable and highly active core‐shell heterostructure electrocatalyst is essential for catalyzing oxygen evolution reaction(OER).Here,a dual‐trimetallic core‐shell heterostructure OER electrocatalyst that consists of a NiFeWS_(2)inner core and an amorphous NiFeW(OH)_(z)outer shell is designed and synthesized using in situ electrochemical *** electrochemical measurements of different as‐synthesized catalysts with a similar mass loading suggest that the core‐shell Ni_(0.66)Fe_(0.17)W_(0.17)S_(2)@amorphous NiFeW(OH)_(z)nanosheets exhibit the highest overall performance compared with that of other bimetallic reference catalysts for the ***,the nanosheet arrays were in situ grown on hydrophilic‐treated carbon paper to fabricate an integrated three‐dimensional electrode that affords a current density of 10 mA cm^(−2)at a small overpotential of 182 mV and a low Tafel slope of 35 mV decade^(−1)in basic *** Faradaic efficiency of core‐shell Ni_(0.66)Fe_(0.17)W_(0.17)S_(2)@amorphous NiFeW(OH)_(z)is as high as 99.5%for *** scanning electron microscope,transmission electron microscope,and X‐ray photoelectron spectroscopy analyses confirm that this electrode has excellent stability in morphology and elementary composition after long‐term electrochemical ***,density functional theory calculations further indicate that the core‐shell heterojunction increased the conductivity of the catalyst,optimized the adsorption energy of the OER intermediates,and improved the OER *** study provides a universal strategy for designing more active core‐shell structure electrocatalysts based on the rule of coordinated regulation between electronic transport and active sites.

关键词： amorphous NiFeW hydroxide core‐shell heterojunction in situ electrochemical tuning NiFeW disulfide oxygen evolution reaction

A股关联公司的股票动量溢出效应研究——基于分析师共同覆盖的视角

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系统工程理论与实践 2023年第7期43卷 1891-1909页

作者：蒋丹凌彭珣朱宏泉纽约州立大学石溪分校商学院纽约11794 西南交通大学经济管理学院成都610031 服务科学与创新四川省重点实验室成都610031

本文基于有限注意力假说,用分析师共同覆盖构建公司相关性,检验了A股市场关联公司之间股票的动量溢出效应.研究发现,以共同覆盖分析师数量作为权重构建的关联公司股票加权平均收益率,能正向预测焦点公司未来1~12月的收益率,基于关联公... 详细信息

本文基于有限注意力假说,用分析师共同覆盖构建公司相关性,检验了A股市场关联公司之间股票的动量溢出效应.研究发现,以共同覆盖分析师数量作为权重构建的关联公司股票加权平均收益率,能正向预测焦点公司未来1~12月的收益率,基于关联公司收益率构建的多空组合可获得10%~12%的年化超额收益;在截面回归中,关联公司动量溢出效应较同行业或同地区公司的动量溢出效应更强.异质性分析表明,在拥有更多分析师共同覆盖、非明星或低学历分析师共同覆盖,以及焦点公司股票被更多压力抵抗型机构投资者持有时,关联公司动量溢出效应更强,说明该效应的成因与分析师和投资者的有限注意带来的行动迟缓和反应滞后相关.本文的工作对A股市场跨资产动量效应给出了全新证据,对市场监管与投资者决策具有参考价值.

关键词：分析师共同覆盖动量溢出效应有限注意力机构投资者

Volumetric modulation arc radiotherapy with flattening filter-free beams compared with conventional beams for nasopharyngeal carcinoma:a feasibility study

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Chinese Journal of Cancer 2013年第7期32卷 397-402页

作者： Mingzan Zhuang Tuodan Zhang Zhijian Chen Zhixiong Lin Derui Li xun peng Qingchun Qiu Renhua Wu Department of Radiation Oncology Tumor Hospital of Shantou University Medical College Department of Medical Physics and Computer Application Shantou University Medical College Department of Radiation The Second Affiliated Hospital of Shantou University Medical College

There is increasing interest in the clinical use of flattening filter-free(FFF) *** this study,we aimed to investigate the dosimetric characteristics of volumetric modulated arc radiotherapy(VMAT) with FFF beams for nasopharyngeal carcinoma(NPC).Ten NPC patients were randomly selected to undergo a RapidArc plan with either FFF beams(RA-FFF) or conventional beams(RA-C).The doses to the planning target volumes(PTVs),organs at risk(OARs),and normal tissues were *** technical delivery parameters for RapidArc plans were also assessed to compare the characteristics of FFF and conventional *** techniques delivered adequate doses to *** PTVs,RA-C delivered lower maximum and mean doses and improved conformity and homogeneity compared with *** techniques provided similar maximum doses to the optic nerves and *** the brain stem,spinal cord,larynx,parotid glands,oral cavity,and skin,RA-FFF showed significant dose increases compared to *** dose to normal tissue was lower in *** monitor units(MUs) were(536 ± 46) MU for RA-FFF and(501± 25) MU for *** treatment duration did not significantly differbetween *** both treatment plans could meet clinical needs,RA-C is dosimetrically superior to RA-FFF for NPC radiotherapy.

关键词：无滤波器鼻咽癌无梁放疗剂量学特性传统平坦调制

New perspectives on the genetic structure of dotted gizzard shad(Konosirus punctatus)based on RAD-seq

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Marine Life Science & Technology 2024年第1期6卷 50-67页

作者： Ying peng Yifan Liu Jiasheng Li Kun Zhang xun Jin Sixu Zheng Yunpeng Wang Zhenming Lu Liqin Liu Li Gong Bingjian Liu National Engineering Laboratory of Marine Germplasm Resources Exploration and Utilization Zhejiang Ocean UniversityZhoushan 316022China National Engineering Research Center for Facilitated Marine Aquaculture Marine Science and Technology CollegeZhejiang Ocean UniversityZhoushan 316022China

To maintain,develop and rationally utilize marine organisms,understanding their genetic structure and habitat adaptation pattern is *** punctatus,which is a commercial fish species inhabiting the Indo-west Pacific Ocean,has shown an obvious annual global capture and aquaculture production decline due to climate changes and human *** the present study,restriction-site associated DNA sequencing(RAD-seq)was used to describe its genome-wide single nucleotide polymorphisms panel(SNPs).Among 146 individuals collected at nine locations scattered in China,Korea and Japan,a set of 632,090 SNPs were *** genetic analysis showed that *** individuals were divided into two significant genetic ***,potential genetic differentiation between northern and southern population of *** was *** results indicated that gene flow existed among sampling locations of ***,especially from southern Japan to ***,candidate genes associated with habitat adaptations of *** were identified,which are involved in diverse physiological processes of *** including growth and development(e.g.,KIDINS220,PAN3),substance metabolism(e.g.,PGM5)and immune response(e.g.,VAV3,CCT7,HSPA12B).Our findings may aid in understanding the possible mechanisms for the population genetic structure and local adaptation of ***,which is beneficial to establish the management and conservation units of ***,guiding the rational use of resources,with reference significance for a profound understanding of the adaptative mechanisms of other marine organisms to the environment.

关键词： Population structure Konosirus punctatus SNP RAD-seq Local adaptation

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书写水利血防新篇章

人民长江 2009年第1期40卷 1-2页

作者：彭汛长江水利委员会血吸虫病防治领导小组办公室

血吸虫病是严重危害人民身体健康和生命安全、阻碍疫区经济发展和社会进步的严重传染病.近年来,由于各种因素的影响,我国血吸虫病疫情明显回升,尚有云南、四川、湖北、湖南、江西、安徽、江苏7省110个县(市、区)血吸虫病流行状况未得到... 详细信息

血吸虫病是严重危害人民身体健康和生命安全、阻碍疫区经济发展和社会进步的严重传染病.近年来,由于各种因素的影响,我国血吸虫病疫情明显回升,尚有云南、四川、湖北、湖南、江西、安徽、江苏7省110个县(市、区)血吸虫病流行状况未得到根本控制.血吸虫病防治工作直接关系到疫区农村广大群众的根本利益.

关键词：血吸虫病血防水利书写生命安全身体健康社会进步经济发展

Robot assisted transperitoneal laparoscopic pyeloplasty

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Chinese Medical Journal 2008年第4期121卷 380-382页

作者： JIN xun-bo LI peng JIANG Shao-bo WANG Mu-wen XIA Qing-hua ZHAO Yong XIONG Hui SUN peng CHEN Xiu-de Minimally Invasive Urology Center Shandong Provincial Hospital Shandong University Jinan Shandong 250021 China

Nowadays, with laparoscope techniques increasingly developed its indications are covering more complicated medical fields. Moreover, as a camera holder, the robotic system of an automated endoscopic system for optimal positioning （AESOP） can be controlled directly by the surgeon＇s voice. It can be more effectively manipulated and more accurately control the video endoscope, which enables the unification of the operator＇s thoughts and visual field and decreases the inadvertent movements from a human assistant. It also improves the learning curve for complicated minimally invasive *** April 2003 anti December 2005, 25 patients with ureteropelvic junction （UPJ） stricture underwent robot assisted transperitoneal laparoscopic pyeloplasty.

关键词： robotics ureteropelvic junction stricture laparoscopic surgery

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氮化铜薄膜的制备及其物理性能

人工晶体学报 2005年第1期34卷 149-154页

作者：岳光辉闫鹏勋兰州大学等离子体与金属材料研究所兰州730000

氮化铜薄膜的光学性能及其突出的低温热分解特性,使得它在信息存储方面有广阔的应用前景。本文概述了国际上制备多晶态氮化铜薄膜的研究进展及其物理性能,并对其应用前景进行展望。

关键词：制备物理性能热分解特性多晶氮化应用前景晶态铜薄膜光学性能信息存储

基于周围型肺癌高剂量率无均整滤过器模式下的2种动态适形弧计划比较

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中南大学学报（医学版） 2021年第6期46卷 615-619页

作者：张基永彭逊汕头大学医学院附属肿瘤医院放疗科广东汕头515000

目的:对高剂量率无均整滤过器模式下的2种动态适形弧计划进行比较,评价其剂量学上的差异。方法:选取20例早期周围型非小细胞肺癌患者,在Eclipse 10.0计划系统中分别设计基于肿瘤中心的动态适形弧(base tumor-center dynamic conformal a... 详细信息

目的:对高剂量率无均整滤过器模式下的2种动态适形弧计划进行比较,评价其剂量学上的差异。方法:选取20例早期周围型非小细胞肺癌患者,在Eclipse 10.0计划系统中分别设计基于肿瘤中心的动态适形弧(base tumor-center dynamic conformal arc,T-DCA)和基于等中心的动态适形弧(base iso-center dynamic conformal arc,Iso-DCA)计划。选择Truebeam加速器无均整滤过器6 MV X射线,剂量率为1 400机器跳数(monitor unit,MU)/min,处方剂量为4 800 cGy,1 200 cGy/次,分4次治疗。靶区覆盖和危及器官限量均按美国放射治疗肿瘤学组(Radiation Therapy Oncology Group,RTOG)标准进行设计,并对2种计划进行比较。结果:T-DCA和Iso-DCA计划的靶区剂量覆盖差异无统计学意义(P>0.05),均能满足RTOG对靶区的剂量要求。2种计划的适形指数(conformity index,CI)和均匀指数(homogeneity index,HI)差异均无统计学意义(均P>0.05),但是距离计划靶区2 cm处任意方向的最大剂量的百分数(D2 cm)和50%处方剂量的等剂量线所包绕的体积与计划靶区体积的比值(R50%)的差异均有统计学意义(均P0.05)。结论:Iso-DCA计划靶区外的剂量跌落优于T-DCA计划,但是T-DCA计划能更好地保护脊髓和食管,同时T-DCA计划的MU更少。

关键词：高剂量率无均整滤过器模式周围型肺癌动态适形体部立体定向放射治疗