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Investigation of ion-atom collision dynamics through imaging techniques

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Science China(Physics,Mechanics & Astronomy) 2008年第7期51卷 755-764页

作者： MA XinWen ZHU XiaoLong LIU HuiPing LI Bin zhang shaofeng CAO ShiPing FENG WenTian XU ShenYue Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Graduate University of Chinese Academy of Sciences Beijing 100049China

The principle and technique details of recoil ion momentum imaging are discussed and summarized. The recoil ion momentum spectroscopy built at the Institute of Modern Physics (Lanzhou) is presented. The first results obtained at the setup are analyzed. For 30 keV He2+ on He collision, it is found that the capture of single electron occurs dominantly into the first excited states, and the related scattering angle results show that the ground state capture occurs at large impact parameters, while the capture into excited states occurs at small impact parameters. The results manifest the collision dynamics for the sub-femto-second process can be studied through the techniques uniquely. Finally, the future possibilities of applications of the recoil ion momentum spectroscopy in other fields are outlined.

关键词： imaging of recoil ion momentum collision dynamics state-selective cross section angular differential cross section

生物菌肥FBR1不同施用方式对花生生长发育及产量的影响

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中国农业科技导报 2024年第6期26卷 200-205页

作者：彭守华许铭铭尉继强梁丽君叶全迟晓元张少峰董向丽威海市农业科学院山东威海264200 山东省花生研究所山东青岛266100 威海市水文中心山东威海264209 威海市农业农村事务服务中心山东威海264200

为探究生物菌肥FBR1(枯草芽孢杆菌)不同施用方式对花生生长发育及产量的影响,以‘花育9113’为供试材料,以不拌种衣剂不施菌肥为对照1(CK1)、种衣剂1250 mL·hm^(-2)拌种不施菌肥为对照2(CK2),设置地表撒施15 kg·hm^(-2)菌粉后起垄播... 详细信息

为探究生物菌肥FBR1(枯草芽孢杆菌)不同施用方式对花生生长发育及产量的影响,以‘花育9113’为供试材料,以不拌种衣剂不施菌肥为对照1(CK1)、种衣剂1250 mL·hm^(-2)拌种不施菌肥为对照2(CK2),设置地表撒施15 kg·hm^(-2)菌粉后起垄播种不拌种衣剂种子(T1)、不拌种衣剂种子播种后穴施菌粉15 kg·hm^(-2)(T2)、菌液7.5 L·hm^(-2)拌种(T3)和种衣剂1250 mL·hm^(-2)拌种后用菌粉15 kg·hm^(-2)包衣(T4)4种不同处理,对各处理的花生植株发育、干物质分配及产量进行分析。结果表明,T1处理可促进花生生长,对单株荚果重和生物总干重有一定的增加作用;T3处理降低了出苗率,T4处理不仅降低了主茎高,而且降低了实收穴数;T1、T3处理的荚果和籽仁分别比CK1增产84.93、34.97和32.48、5.00 kg·hm^(-2),T2处理的荚果和籽仁比CK1分别减产84.93和82.43 kg·hm^(-2),T4处理的荚果和籽仁比CK2分别减产92.42和32.47 kg·hm^(-2),但增减幅度均不显著。综上,考虑威海土壤条件多样性,推荐地表撒施15 kg·hm^(-2)菌粉后起垄播种不拌种衣剂种子的施肥方式,并在做好示范试验的前提下,因地制宜施用FBR1生物菌肥。以上研究结果为生物菌肥在花生生产上的利用提供参考依据。

关键词： FBR1菌株生物菌肥花生生长发育产量

Industrial-scale investigations on effects of tertiary-air declination angle on combustion and steam temperature characteristics in a 350-MW supercritical down-fired boiler

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Frontiers in Energy 2021年第1期15卷 132-142页

作者： Xiaoguang LI Lingyan ZENG Hongye LIU Yao LI Yifu LI Yunlong ZHAO Bo JIAO Minhang SONG shaofeng zhang Zhichao CHEN Zhengqi LI School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China Guizhou Wanfeng Electric Power Co. Ltd.Xingyi 562400China Guizhou Xingyi Project Department Huadian United(Beijing)Power Engineering Co.Ltd.Xingyi 562400China

Industrial-scale experiments were conducted to study the effects of tertiary air declination angle(TDA)on the coal combustion and steam temperature characteristics in the first 350-MW supercritical down-fired boiler in China with the multiple-injection and multiple-staging combustion(MIMSC)technology at medium and high *** experimental results indicated that as the TDA increased from 0°to 15°,the overall gas temperature in the lower furnace rose and the symmetry of temperature field was *** ignition distance of the fuel-rich coal/air flow *** near-burner region,the concentration of O2 decreased while the concentrations of CO and NO *** concentration of NO decreased in near-tertiary-air *** carbon in fly ash decreased significantly from 8.40%to 6.45%at a load of 260 *** a TDA of 15°,the ignition distances were the shortest(2.07 m and 1.73 m)at a load of 210 MW and 260 MW,*** main and reheat steam temperatures were the highest(557.2℃ and 559.4℃ at a load of 210 MW,558.4℃ and 560.3℃ at a load of 260 MW).The carbon in fly ash was the lowest(4.83%)at a load of 210 *** changing the TDA from 15°to 25°,the flame kernel was found to move downward and the main and reheat steam temperatures dropped *** change of TDA has little effect on NO_(x) emissions(660–681 mg/m^(3) at 6%O_(2)).In comprehensive consideration of the pulverized coal combustion characteristics and the unit economic performance,an optimal TDA of 15°is recommended.

关键词： supercritical down-fired boiler industrialscale experiment tertiary air declination angle coal combustion steamtemperature

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传染病医院转型发展实践路径与思考

新发传染病电子杂志 2024年第1期9卷 55-59页

作者：戴菲菲胡亮陈蕾张绍峰易永祥南京中医药大学附属南京医院(南京市第二医院)医保办公室江苏南京210003 南京中医药大学附属南京医院(南京市第二医院)院长办公室江苏南京210003 南京中医药大学附属南京医院(南京市第二医院)运营绩效办公室江苏南京210003 南京中医药大学附属南京医院(南京市第二医院)医务处江苏南京210003

长期以来,我国传染病医院的发展面临着病源少、人才缺、学科弱、运营难、竞争多的压力与挑战,伴随着历次重大公共卫生事件的发生和应对,传染病医院迎来了转型发展的机遇和调整。本文以南京市第二医院为例,从明确转型发展战略规划、全面... 详细信息

长期以来,我国传染病医院的发展面临着病源少、人才缺、学科弱、运营难、竞争多的压力与挑战,伴随着历次重大公共卫生事件的发生和应对,传染病医院迎来了转型发展的机遇和调整。本文以南京市第二医院为例,从明确转型发展战略规划、全面启动学科平台建设、重点推进人才梯队培养、持续提升医疗服务水平、补齐追平科教发展洼地、逐步探索医院精细管理6个方面,详细阐述了传染病医院综合化转型发展实践路径。经过多年的实践发展,医院实现了规模体量的层级增长,医疗服务能力显著增强,学科品类建设齐全,亚专科发展特色鲜明,新技术新项目开展迅速,运营效率不断优化,患者满意度稳步提升。近5年门急诊量、出院患者人次、出院患者手术台数等均有显著增加,平均住院日和门诊均次费用则有明显下降,有效检验了转型发展路径的可行性。同时,在公立医院高质量发展的新时代背景下,对传染病医院综合化转型后新阶段的内涵发展也提出了思考。

关键词：传染病医院转型发展综合化实践路径

食管癌术后重症肺炎患者血清肺表面活性物质相关蛋白质-D、高迁移率族蛋白B1和中性粒细胞与淋巴细胞比值水平变化及检测意义

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陕西医学杂志 2024年第8期53卷 1114-1117,1123页

作者：张少锋李丹青杜凡魏志强王海军邢台市人民医院胸外科河北邢台054001

目的:探讨中性粒细胞与淋巴细胞比值(NLR)、肺表面活性物质相关蛋白质-D(SP-D)及高迁移率族蛋白B1(HMGB1)在食管癌术后重症肺炎(SP)患者中的水平变化及检测意义。方法:选取接受手术治疗的食管癌患者257例,根据手术治疗后是否发生SP将患... 详细信息

目的:探讨中性粒细胞与淋巴细胞比值(NLR)、肺表面活性物质相关蛋白质-D(SP-D)及高迁移率族蛋白B1(HMGB1)在食管癌术后重症肺炎(SP)患者中的水平变化及检测意义。方法:选取接受手术治疗的食管癌患者257例,根据手术治疗后是否发生SP将患者分为SP组(124例)和对照组(133例)。比较两组血清SP-D、HMGB1和NLR水平。记录SP组患者28 d内预后情况,根据28 d内生存情况将SP组患者分为生存组(104例)和病死组(20例)。比较两组一般资料及实验室指标,采用Logistic回归分析食管癌术后SP患者预后影响因素。绘制受试者工作特征(ROC)曲线分析NLR、SP-D及HMGB1对食管癌术后SP患者28 d内病死风险的预测价值。结果:SP组血清SP-D及HMGB1和NLR水平高于对照组(均P<0.05)。病死组NLR、SP-D及HMGB1水平高于生存组(均P<0.05)。NLR、SP-D及HMGB1是食管癌术后SP患者病死的影响因素(均P<0.05)。NLR、SP-D及HMGB1预测食管癌术后SP患者28 d内病死风险的AUC分别为0.744、0.763、0.715,而三者联合检测的AUC更高(均P<0.05)。结论:食管癌术后SP患者NLR、SP-D及HMGB1水平升高,且与患者预后有关,三者联合检测有助于提升对患者病死风险的预测价值。

关键词：食管癌重症肺炎中性粒细胞与淋巴细胞比值肺表面活性物质相关蛋白质-D 高迁移率族蛋白B1 预后

Patterns and Cellular Mechanisms of Arm Regeneration in Adult Starfish Asterias rollestoni Bell

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Journal of Ocean University of China 2011年第3期10卷 255-262页

作者： FAN Tingjun FAN Xianyuan DU Yutang SUN Wenjie zhang shaofeng LI Jiaxin Department of Marine Biology College of Marine Life Sciences Ocean University of China Qingdao 266003 P. R. China

To understand the mechanisms of starfish regeneration, the arms of adult starfish Asterias rollestoni Bell were amputated and their regeneration patterns and cellular mechanisms were *** was found that cells in the outer epidermis and inner parietal peritoneum near the end of the stump began to dedifferentiate 4 d after amputation. The dedifferentiated cells in the outer epidermis proliferated,migrated to the wound site and formed a thickened pre-epidermis which would then re-differentiate gradually into ma-ture *** new parietal peritoneum formed on the coelomic side of wound might be from the curvely elongated parietal peritoneum, resulting from the dedifferentiated and proliferated cells by extension. Afterwards, the proliferated cells made the outer epidermis and inner parietal peritoneum invaginate into the interior dermis and formed blastema-like structures together with induced dedifferentiated dermal cells. Most interestingly, the arm regeneration in A. rollestoni was achieved synchronously by de novo arm-bud formation and growth, and arm-stump elongation. The crucial aspects of arm-bud formation included cell dedifferentiation, proliferation and migration, while those of arm-stump elongation included cell dedifferentiation, proliferation, invagination, and arm-wall-across blastema-like structure formation. The unique pattern and cellular mechanisms of amputated arm regeneration make it easier to understand the rapid regeneration process of adult starfish. This study may lay solid foundations for the research into mo-lecular mechanisms of echinoderm regeneration.

关键词： arm regeneration blastema-like structure adult starfish Asterias rollestoni Bell

基于数据驱动的数据中心平面布局三维数字化设计

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南方能源建设 2024年第S1期11卷 47-55页

作者：何娇娇李舒涛张少峰吴劲松赵德宁廖霄中国能源建设集团广东省电力设计研究院有限公司广东广州510663 华南理工大学广东广州510641 中国电力工程顾问集团有限公司北京100000

[目的]数据中心的平面布局是其设计方案的重要设计输入,其变化将导致设计成果的巨大变化。而数据中心又是一个极其复杂的基础设施,各专业之间的关联性较强,每个专业的变化又会同时影响一个或多个专业,从而影响整个平面布局。对于目前传... 详细信息

[目的]数据中心的平面布局是其设计方案的重要设计输入,其变化将导致设计成果的巨大变化。而数据中心又是一个极其复杂的基础设施,各专业之间的关联性较强,每个专业的变化又会同时影响一个或多个专业,从而影响整个平面布局。对于目前传统的各专业各司其职的并行工作模式,往往平面布局的确认需要经过多专业多次的计算分析、互提资料及协调沟通,不仅消耗了大量的时间,频繁的调整也难以确保质量。[方法]为提高平面布局的设计效率和质量,文章提出了一种基于数据驱动的模块化、参数化、可视化平面布局设计模型及方法,通过三维数字化设计工具Revit、可视化编程工具Dynamo,实现平面布局随着输入参数自动完成设计。[结果]通过这种方法,设计人员只需要输入一些关键的需求和指标参数,即可以完成平面布局的自动设计。[结论]基于数据驱动在数据中心平面布局三维数字化设计,一方面大大提升了设计效率,节省了人力物力,一方面通过将标准规范等硬性约束内置在设计模型中,不仅可以大大提升设计质量,还为项目设计各阶段节省大量时间。

关键词：参数化平面布局自动设计三维数字化

PVA纤维体积率对PVA-ECC力学性能的影响

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材料导报 2018年第18期32卷 3266-3270,3275页

作者：祝和意张少峰陕西铁路工程职业技术学院陕西省高性能混凝土工程实验室渭南714099

使用国产基体材料并利用铁尾矿砂细骨料替代天然砂,掺入长度为12mm的PVA纤维,制备铁尾矿砂细骨料PVA纤维水泥基复合材料(PVA-ECC),并通过实验研究了PVA纤维体积率对PVA-ECC性能的影响。实验结果表明:PVA-ECC的工作性能和基本力学性能稳... 详细信息

使用国产基体材料并利用铁尾矿砂细骨料替代天然砂,掺入长度为12mm的PVA纤维,制备铁尾矿砂细骨料PVA纤维水泥基复合材料(PVA-ECC),并通过实验研究了PVA纤维体积率对PVA-ECC性能的影响。实验结果表明:PVA-ECC的工作性能和基本力学性能稳定,制备工艺满足要求。PVA纤维体积率对提高PVA-ECC抗压强度的作用不明显,体积率在1.6%~2%时,PVA-ECC破坏后的整体性较好,体积率为2%时最佳,但过量的PVA纤维掺入会降低其抗压强度。PVA纤维体积率对PVA-ECC韧性的影响显著,体积率在1.6%~2%时,韧性明显增加,体积率为2%时的效果最佳,其极限荷载和抗弯强度达到峰值,弯曲韧性指标显著增大,试件破坏前出现多缝开裂现象,呈现韧性破坏特征;通过韧性指数法判定PVA-ECC为韧性材料。

关键词： PVA纤维水泥基复合材料体积率力学性能

Typical basin-fill sequences and basin migration in Yanshan, North China ——Response to Mesozoic tectonic transition

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Science China Earth Sciences 2004年第2期47卷 181-192页

作者： LI Zhong, LIU shaofeng, zhang Jinfang & WANG Qingchen1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 2. China University of Geosciences, Beijing 100083, ChinaCorrespondence should be addressed to Li Zhong (email: lizhongd@***) Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China China University of Geosciences Beijing China

Basin-fill sequences of Mesozoic typical basins in the Yanshan area, North China may be divided into four phases, reflecting lithosphere tectonic evolution from flexure (T3), flexure with weak rifting (J1+2), tectonic transition (J3), and rifting (K). Except the first phase, the other three phases all start with lava and volcaniclastic rocks, and end with thick coarse clastic rocks and/or conglomerates, showing cyclic basin development rather than simple cyclic rift mechanism and disciplinary basin-stress change from extension to compression in each phase. Prototype basin analysis, based on basin-fill sequences, paleocurrent distribution and depositional systems, shows that single basin-strike and structural-line direction controlling basin development had evidently changed from east-west to northeast in Late Jurassic in the Yanshan area, although basin group still occurred in east-west zonal distribution. Till Early Cretaceous, main structural-line strike controlling basins just turned to northeast by north in the studied area.

关键词： Yanshan, Mesozoic, basin-fill, paleocurrent, tectonic transition.