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New cross section measurements on tungsten isotopes around 14 MeV neutrons and their excitation functions

Chinese Physics C 2022年第5期46卷 95-107页

作者： Yong Li Fengqun Zhou Yajuan Hao Xiaoqiang Ma pengfei ji Xiaopeng Zhang Shuqing Yuan School of Electrical and Mechanical Engineering Pingdingshan UniversityPingdingshan 467000China School of Information Engineering Pingdingshan UniversityPingdingshan 467000China

New cross sections of the^(183)W(n,α)^(180m)Hf,^(186)W(n,d*)^(185)Ta,^(182)W(n,p)^(182)Ta,^(184)W(n,p)^(184)Ta,^(182)W(n,2n)^(181)W,^(184)W(n,α)^(181)Hf,and^(186)W(n,α)^(183)Hf reactions were measured in the neutron energy range of 13.5-14.8 MeV via the activation technique to improve the database and resolve *** neutrons in this energy range were produced via the T(d,n)^(4)He reaction on a solid Ti-T *** activities of the irradiated monitor foils and samples were measured using a well-calibrated high-resolution HPGe *** calculations of the excitation functions of the seven nuclear reactions mentioned above in the neutron energies from the threshold to 20 MeV were performed using the nuclear theoretical model program TALYS-1.9 to aid new evaluations of cross sections on tungsten *** experimental data obtained were analyzed and compared with that of previous experiments conducted by other researchers,and with the evaluated data available in the five major evaluated nuclear data libraries of IAEA(namely ENDF/B-VIII.0 or ENDF/B-VII.0,JEFF-3.3,JENDL-4.0u+,CENDL-3.2,and BROND-3.1 or ROSFOND-2010),and the theoretical values acquired using TALYS-1.9 nuclear-reaction modeling *** new cross section measurements agree with those of some recent experiments and theoretical excitation curves at the corresponding *** consistency of the theoretical excitation curves based on TALYS-1.9 with these experimental data is better than that of the evaluated curves available in the five major nuclear data libraries of IAEA.

关键词： cross sections tungsten activation technique off-line gamma-ray spectrometry theoretical calculations TALYS-1.9

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Cross section measurements for(n,2n),(n,α),and(n,p)reactions on rhenium isotopes around 14 MeV neutrons and their theoretical calculations of excitation functions

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Chinese Physics C 2021年第7期45卷 195-204页

作者： Fengqun Zhou Yueli Song Xinyi Chang Yong Li Shuqing Yuan pengfei ji Mingli Tian School of Electrical and Mechanical Engineering Pingdingshan UniversityPingdingshan 467000China Henan Key Laboratory of Research for Central Plains Ancient Ceramics Pingdingshan UniversityPingdingshan 467000China

Cross-section data of the^(185)Re(n,2n)^(184)mRe,^(185)Re(n,2n)^(184)gRe,^(185)Re(n,α)182m1+m2+gTa,^(187)Re(n,2n)^(186)g,(m)Re,^(187)Re(n,α)^(184)Ta,and^(187)Re(n,p)^(187)W reactions were measured at four neutron energies,namely 13.5,14.1,14.4,and 14.8 MeV,by means of the activation technique,relative to the reference cross-section values of the 93Nb(n,2n)92mNb *** neutrons were generated from the T(d,n)4He reaction at the K-400 Neutron Generator at China Academy of Engineering *** inducedγactivities were measured using a high-resolutionγ-ray spectrometer equipped with a coaxial high-purity germanium *** excitation functions of the six above-mentioned nuclear reactions at neutron energies from the threshold to 20 MeV were calculated by adopting the nuclear theoretical model program system Talys-1.9 with the relevant parameters properly *** measured cross sections were analyzed and compared with previous experiments conducted by other researchers,and with the evaluated data of BROND-3.1,ENDF/B-VIII.0,JEFF-3.3,and the theoretical values based on *** new measured results agree with those of previous experiments and the theoretical excitation curve at the corresponding *** theoretical excitation curves based on Talys-1.9 generally match most of experimental data well.

关键词： cross sections of(n,2n) (n,a)and(n,p)reactions rhenium isotopes activation technique off-line y-ray spectrometry theoretical calculations

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Analysis on Extreme Gale of Capital Airport

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Meteorological and Environmental Research 2017年第4期8卷 12-14,19页

作者： Huang jixiong ji pengfei Meteorological Center Air Traffic Management Bureau of North ChinaCAACBeijing 100621China

Observation data of extreme gale in Capital Airport during 1976-2013 were analyzed,and climate characteristics of extreme gale in Capital Airport were summarized. Moreover,three extreme gale weather processes with larger influences on December 10,2010,November 22,2011 and March 9,2013 were contrasted and analyzed,and results showed that extreme gale in Capital Airport mainly appeared during March-April or December-January. Occurrence frequency of extreme gale was the most from late afternoon to evening,and the minimum was from night to morning,while peak appeared during 14:00-15:00. Extreme gale of Capital Airport was dominated by northwest gale at the rear of cold front,and the peak occurred at the wind direction of 330°. The common effect of strong cold high pressure going south at the rear of ground cold front and highaltitude transverse trough turning vertical was main cause of extreme gale in Capital Airport,and momentum transmission below 500 hP a also had an important effect in the generation of extreme gale.

关键词： Extreme gale Cold front Northeast low pressure Momentum transmission Transverse trough turning vertical

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稀土熔炼用钼坩埚失效原因分析

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中国钼业 2024年第1期48卷 40-44页

作者：季鹏飞刘石明刘聪之张显武赵晓锦白义甲安泰天龙钨钼科技有限公司北京100081

为查明某规格稀土熔炼用钼坩埚穿孔原因,对失效钼坩埚样品进行了宏观形貌分析、化学成分分析、腐蚀分析。结果表明:引起该坩埚穿孔的主要原因是氟化锂熔盐中的锂对钼造成严重腐蚀,证明了穿孔所在的这一近似水平截面处的坩埚壁腐蚀严重,... 详细信息

为查明某规格稀土熔炼用钼坩埚穿孔原因,对失效钼坩埚样品进行了宏观形貌分析、化学成分分析、腐蚀分析。结果表明:引起该坩埚穿孔的主要原因是氟化锂熔盐中的锂对钼造成严重腐蚀,证明了穿孔所在的这一近似水平截面处的坩埚壁腐蚀严重,穿孔所在位置并非特殊的缺陷处。穿孔所在的这一近似水平截面处最薄,腐蚀最严重。

关键词：稀土钼坩埚穿孔腐蚀锂熔盐

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可重复使用运载器再入段喷气选择逻辑重构研究

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西北工业大学学报 2007年第6期25卷 794-799页

作者：及鹏飞周军呼卫军西北工业大学精确制导与控制研究所陕西西安710072

针对反作用控制系统(RCS)推力器开机失效后的喷气选择逻辑(JSL)重构问题进行了研究,提出了2种实现JSL重构的方法:①基于组合逻辑检索的方法;②基于冲量矩控制的线性规划方法。RCS是可重复使用运载器(RLV)再入过程中控制姿态的主要执行机... 详细信息

针对反作用控制系统(RCS)推力器开机失效后的喷气选择逻辑(JSL)重构问题进行了研究,提出了2种实现JSL重构的方法:①基于组合逻辑检索的方法;②基于冲量矩控制的线性规划方法。RCS是可重复使用运载器(RLV)再入过程中控制姿态的主要执行机构,所以RCS能否正常工作关系到RLV能否成功再入返回。为了提高RCS的可靠性,必须考虑RCS推力器开机失效后的喷气选择逻辑(JSL)重构问题。基于美国X-34技术验证机后部RCS配置方案的仿真试验证明了在出现推力器开机失效时,应用这两种JSL重构方法后,虽然控制效果有所降低,偏航、滚转角与角速度出现了振荡,但仍能满足系统性能要求。

关键词：可重复使用运载器反作用控制系统喷气选择逻辑重构

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GRK2-YAP signaling is implicated in pulmonary arterial hypertension development

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Chinese Medical Journal 2024年第7期137卷 846-858页

作者： Peng Ye Yunfei Deng Yue Gu pengfei Liu jie Luo jiangqin Pu jingyu Chen Yu Huang Nanping Wang Yong ji Shaoliang Chen Division of Cardiovascular Molecular Laboratory Third Clinical CollegeNanjing Medical UniversityNanjingJiangsu 210006China Division of Cardiovascular Laboratory Nanjing First HospitalNanjing Medical UniversityNanjingJiangsu 210006China Division of Cardiology Shanghai General HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200080China Division of Pulmonary Surgery Wuxi People’s HospitalNanjing Medical UniversityWuxiJiangsu 300247China Institute of Vascular Medicine The Chinese University of Hong KongHongkong 999077China Health Science Center East China Normal UniversityShanghai 200241China School of Pharmacy Nanjing Medical UniversityNanjingJiangsu 210004China Division of Cardiology Nanjing First HospitalNanjing Medical UniversityNanjingJiangsu 210006China

Background:Pulmonary arterial hypertension(PAH)is characterized by excessive proliferation of small pulmonary arterial vascular smooth muscle cells(PASMCs),endothelial dysfunction,and extracellular matrix remodeling.G protein-coupled receptor kinase 2(GRK2)plays an important role in the maintenance of vascular tone and blood ***,the role of GRK2 in the pathogenesis of PAH is ***:GRK2 levels were detected in lung tissues from healthy people and PAH patients.C57BL/6 mice,vascular smooth muscle cell-specific Grk2-knockout mice(Grk2^(∆SM22)),and littermate controls(Grk2^(flox/flox))were grouped into control and hypoxia mice(n=8).Pulmonary hypertension(PH)was induced by exposure to chronic hypoxia(10%)combined with injection of the SU5416(cHx/SU).The expression levels of GRK2 and Yes-associated protein(YAP)in pulmonary arteries and PASMCs were detected by Western blotting and immunofluorescence *** mRNA expression levels of Grk2 and Yes-associated protein(YAP)in PASMCs were quantified with real-time polymerase chain reaction(RT-PCR).Wound-healing assay,3-(4,5)-dimethylthiahiazo(-z-y1)-3,5-di-phenytetrazoliumromide(MTT)assay,and 5-Ethynyl-2′-deoxyuridine(EdU)staining were performed to evaluate the proliferation and migration of ***,the interaction among proteins was detected by immunoprecipitation ***:The expression levels of GRK2 were upregulated in the pulmonary arteries of patients with PAH and the lungs of PH ***,cHx/SU-induced PH was attenuated in Grk2^(∆SM22) mice compared with littermate *** amelioration of PH in Grk2^(∆SM22) mice was accompanied by reduced pulmonary vascular *** vitro study further confirmed that GRK2 knock-down significantly altered hypoxia-induced PASMCs proliferation and migration,whereas this effect was severely intensified by overexpression of *** also identified that GRK2 promoted YAP expression and nuclear translocation in PASMCs,resulting in excessive PA

关键词： Pulmonary arterial hypertension GRK2 YAP Pulmonary artery smooth muscle cell Hypoxia

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Design of an Automatic Testing System for Camera UI Test

Design of an Automatic Testing System for Camera UI Test

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第三十九届中国控制会议

作者： pengfei ji Yiwen Qi Chi Zhang Ning Xing School of Automation Shenyang Aerospace University

In view of the current tedious camera inspection process,limited test cycle and complex test content,in order to reduce the work intensity of testers,the automatic test is designed for functional test with high repeatability and easy *** paper uses video image processing technology and proposes an automatic test application for camera User Interface（UI）.The experimental results show that this system can meet the test requirements for UI in camera function test,which can effectively save the time cost of UI test and improve test efficiency.

关键词： Camera Detection Technology Automatic Test Hash Algorithm Video Image Processing

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The Designation of Quality and Price based on Vertical Product Differentiation

The Designation of Quality and Price based on Vertical Produ...

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2011 International Conference on Advanced Materials and Computer Science(ICAMCS 2011)

作者： Su Yingsheng Li jianfu Wu jiang ji pengfei Statistics School Southwestern University of Finance and Economics

Different consumer demands different quality, which determines that existence of different quality of the same product is reasonable. The article uses two-stage game of fully non-perfect information. Through two-stage game analysis, the article concludes that whether new entrants should enter the market is not only related with the fixed cost of entry, the number of consumers and the highest taste of consumers, but also related to the quality choices of incumbents;after entrants enter the market, the choices of quality are decided by the quality choices of incumbents.

关键词： Vertical differences Quality Product Market share Game theory

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旋翼机用Mg-Gd合金组织和力学性能的研究

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中国稀土学报 2018年第2期36卷 208-214页

作者：冀敏冀朋飞何新林西京学院机电技术系陕西西安710123

借助OM,XRD,SEM和电子拉力试验机,对Mg-(4%~16%)Gd二元合金的显微组织及力学性能分析,并采用"边-边匹配"模型研究了其强化机制,结果表明:随着Gd含量的增加,对Mg-Gd合金铸态组织有强烈的细化作用,并生成高熔点的Mg_5Gd相。经过固溶时效... 详细信息

借助OM,XRD,SEM和电子拉力试验机,对Mg-(4%~16%)Gd二元合金的显微组织及力学性能分析,并采用"边-边匹配"模型研究了其强化机制,结果表明:随着Gd含量的增加,对Mg-Gd合金铸态组织有强烈的细化作用,并生成高熔点的Mg_5Gd相。经过固溶时效处理后的合金,有新相Mg_3Gd生成。合金的屈服强度及高温抗拉强度显著提高。同时,随着温度的升高,合金的抗拉强度具有反常的温度效应。

关键词：镁合金 Gd 显微组织力学性能

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掘进装备运输机构液压驱动的改进研究

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煤矿机械 2019年第2期40卷 101-103页

作者：冀鹏飞中国煤炭科工集团太原研究院有限公司太原030006 山西天地煤机装备有限公司太原030006

掘进机一运和星轮由阀控液压马达驱动,泵控马达较阀控马达的能量利用率高。基于现有的轴向柱塞泵,实现泵控一运和星轮马达就需要多台泵才能实现。提出了新的泵控马达解决方案,重新设计液压泵的配流机构,通过仿真分析和试验,改造后轴向... 详细信息

掘进机一运和星轮由阀控液压马达驱动,泵控马达较阀控马达的能量利用率高。基于现有的轴向柱塞泵,实现泵控一运和星轮马达就需要多台泵才能实现。提出了新的泵控马达解决方案,重新设计液压泵的配流机构,通过仿真分析和试验,改造后轴向柱塞泵不同压油口的压力、流量特性互不影响,结果表明改造方案是可行的,实现了1台泵当作2个独立的动力源使用。

关键词：轴向柱塞泵配流盘流量脉动压力脉动

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