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Design,fabrication,and testing of an X-band 9-MeV standing-wave electron linear accelerator

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Nuclear Science and Techniques 2023年第7期34卷 219-230页

作者： Jian Gao Hao Zha Jia-Ru Shi Qiang Gao Xian-Cai Lin fang-jun hu Qing-Zhu Li huai-Bi Chen Department of Engineering Physics Tsinghua UniversityBeijing 100084China Key Laboratory of Particle and Radiation Imaging(Tsinghua University) Ministry of EducationBeijing 100084China

In this study,an X-band standing-wave biperiodic linear accelerator was developed for medical radiotherapy that can accel-erate electrons to 9 MeV using a 2.4-MW *** structure works atπ/2 mode and adopts magnetic coupling between cavities,generating the appropriate adjacent mode separation of 10 *** accelerator is less than 600-mm long and constitutes four bunching cells and 29 normal *** optimizations,full-scale radiofrequency(RF)simulations,and beam dynamics calculations were *** accelerator was fabricated and examined using a low-power RF *** cold test results showed a good agreement with the simulation and actual measurement *** the high-power RF test,the output beam current,energy spectrum,capture ratio,and spot size at the accelerator exit were *** the input power of 2.4 MW,the pulse current was 100 mA,and the output spot root-mean-square radius was approximately 0.5 *** output kinetic energy was 9.04 MeV with the spectral FWHM of 3.5%,demonstrating the good performance of this accelerator.

关键词： Standing-wave accelerating structure RF analysis Thermal DC gun Low-power RF test High-power experiment

Effects of Hydroxyethyl Starch 130/0.4 Pretreatment on Endotoxin-InducedAcute Lung Injury in Rats

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麻醉与监护论坛 2010年第3期17卷 174-179页

作者： Wei Zhang Cai fang jun Ma Yan-hu Xie Juan Li Department of Anesthesiology Affiliated Anhui Provincial Hospital of Anhui Medical University Hefei 230001 China

维普期刊数据库评论

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泌尿系肿瘤人端粒酶催化基团mRNA的表达

复旦学报（医学版） 2002年第4期29卷 284-286页

作者：王晓徐可丁强姚孟树方祖军赵笏张元芳复旦大学附属华山医院泌尿外科上海200040

目的　探讨泌尿系肿瘤中端粒酶催化基因 (hTRT)mRNA的表达与肿瘤分期和分级的关系。方法　应用原位杂交技术对膀胱癌、肾癌标本和膀胱、肾脏正常组织进行hTRTmRNA表达检测。结果　 48例膀胱癌标本中 42例hTRTmRNA阳性表达 ,hTRTmRNA阳... 详细信息

目的　探讨泌尿系肿瘤中端粒酶催化基因 (hTRT)mRNA的表达与肿瘤分期和分级的关系。方法　应用原位杂交技术对膀胱癌、肾癌标本和膀胱、肾脏正常组织进行hTRTmRNA表达检测。结果　 48例膀胱癌标本中 42例hTRTmRNA阳性表达 ,hTRTmRNA阳性率为 88% ,对照组 30例中 2例正常膀胱组织黏膜阳性表达 ,两者存在明显差异 (P <0 .0 1) ,肿瘤分级与肿瘤组织hTRTmRNA表达情况无相关性。 2 9例肾癌组织hTRTmRNA阳性 2 5例 ,阳性率为 86 % ,对照组 30例中 2例肾脏正常组织hTRTmRNA阳性表达 ,两者存在明显差异 (P <0 .0 1) ,肿瘤分期与肿瘤组织hTRTmRNA表达情况无相关性。结论　hTRTmRNA在肾癌和膀胱癌中有异常阳性表达。

关键词：泌尿系肿瘤端粒酶原位杂交 mRNA 肿瘤分期基因表达

Nanobubbles on the Solid-Liquid Interface

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Nanobubbles on the Solid-Liquid Interface

第三届散裂中子源多学科应用研讨会

作者： Li-juan Zhang, Yi Zhang, Chun-hai Fan, Hai-ping fang, and jun hu The Shanghai Institute of Applied Physics, CAS, 201800, Bio-X Research Center, Shanghai JiaoTong University, 200030, China

＜正＞Water is ubiquitous. But we don’t know the half of it. The existence of nanobubbles at the interface makes the behavior of water more elusive. And the accumulation of gas at the nanometer scale at the water/solid interface has evoked an upwelling of re-considerations on the traditional understanding of many classical processes such as fast folding of proteins,

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来源： cnki会议评论

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cnki会议

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建设项目招标不平衡报价识别机制研究

建筑经济 2017年第2期38卷 63-67页

作者：方俊龚越胡光和武汉理工大学土木工程与建筑学院湖北武汉430070 珠海十字门中央商务区建设控股有限公司广东珠海519031

在对不平衡报价形成机理、形式及其合法性分析的基础上,通过选取合适的评价基点,引入模糊综合评价模型和熵权法进行不平衡报价偏离程度的量化识别,并结合实例分析进行验证计算,为建设项目招标审计过程中判定投标报价的有效性、合理性提... 详细信息

在对不平衡报价形成机理、形式及其合法性分析的基础上,通过选取合适的评价基点,引入模糊综合评价模型和熵权法进行不平衡报价偏离程度的量化识别,并结合实例分析进行验证计算,为建设项目招标审计过程中判定投标报价的有效性、合理性提供了一种分析思路。

关键词：建设项目工程量清单不平衡报价熵权法

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纵折后牙的保存方法与疗效分析

上海口腔医学 2004年第5期13卷 452-454页

作者：孙敦方王益骏胡闻奇上海市黄浦区牙病防治所上海200002

目的:探索纵折后牙保存治疗的理想方法。方法:回顾保存治疗的纵折后牙临床资料297例,对牙位、病因、牙髓情况、保存方法、就诊时间及失败原因进行分析。结果:258例成功,39例失败拔除。16例1周以上就诊全部失败。保存病例随访2～10a,成... 详细信息

目的:探索纵折后牙保存治疗的理想方法。方法:回顾保存治疗的纵折后牙临床资料297例,对牙位、病因、牙髓情况、保存方法、就诊时间及失败原因进行分析。结果:258例成功,39例失败拔除。16例1周以上就诊全部失败。保存病例随访2～10a,成功率为86.87%。结论:纵折后牙经早期固定,完善治疗可以有效保存,并发挥咀嚼功能。

关键词：后牙纵折保存疗效

甲醇常压气相羰化合成醋酸的Ni/AC催化剂的制备及活化

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天然气化工—C1化学与化工 2002年第5期27卷 4-7页

作者：马正飞石磊方峻姚虎卿南京工业大学化工学院南京210009

在常压气固床催化评价装置上 ,对Ni/AC催化剂制备中的浸渍、干燥、活化等步骤进行了详细考察 ,给出了较理想的制备条件 :热处理温度 (40 0℃ )和还原温度 (70 0℃ )。与已有的报道相比 ,这样制得的催化剂 ,用于常压气相甲醇羰化合成醋... 详细信息

在常压气固床催化评价装置上 ,对Ni/AC催化剂制备中的浸渍、干燥、活化等步骤进行了详细考察 ,给出了较理想的制备条件 :热处理温度 (40 0℃ )和还原温度 (70 0℃ )。与已有的报道相比 ,这样制得的催化剂 ,用于常压气相甲醇羰化合成醋酸反应 ,甲醇转化率提高了 7 2 4 % ,醋酸收率提高了 4 6 7%。

关键词：甲醇气相羰化合成 Ni/AC催化剂制备醋酸活化常压条件活性碳负载镍催化剂

Improved patch antenna performance by using a metamaterial cover

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第2期8卷 192-196页

作者： Zhu fang-ming hu jun Department of Electrical Engineering Hangzhou Teachers College Hangzhou 310036 China Center for Optical and Electromagnettc Research Zhejiang University Hangzhou 310027 China

A new patch antenna system with a metamaterial cover is presented in this paper. The impedance, radiation pattem, and directivity of such an antenna are studied. A performance comparison between the conventional patch antenna and the new metamaterial patch antenna is given. The results show that the directivity of the metamaterial patch antenna is significantly improved. The effect of the metamaterial cover＇s layer numbers on the radiation pattern of the patch antenna is also studied.

关键词： Directivity Metamaterial Patch antenna

Molecular dynamics simulation studies on some topics of water molecules on hydrophobic surfaces

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Nuclear Science and Techniques 2006年第2期17卷 71-77页

作者： fang Hai-Ping hu jun Shanghai Institute of Applied Physics the Chinese Academy of Sciences Shanghai 201800 China Bio-X Life Sciences Research Center College of Life Science and Technology Shanghai Jiaotong University Shanghai 200030 China

Molecular dynamics simulations have been used to study two topics of water molecules on hydrophobic surfaces. Some properties of the nanobubbles with different ingredients and behavior of single water chains in sin- gle-walled carbon nanochannels are exploited. Molecular simulations show that the density of the N2 and H2 are quite high, which is critical for the stability of the nanobubbles and may have potential applications, such as hydrogen storage, incorporated with recent experimental method to controllably produce hydrogen nanobubbles. The water molecules inside the nanochannel show an unexpected directed motion with long time period, which is indispensable in the future study of the dynamics of biological channels.

关键词：分子动力学模拟纳米通道水分子防水薄膜