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Hot-electron Recirculation in Ultraintense Laser Pulse Interactions With Thin Foils

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Hot-electron Recirculation in Ultraintense Laser Pulse Inter...

Two new ent-kaurane diterpenoids from Isodon henryi

作者： huANG yong-sheng

Proton acceleration mechanisms in ultraintense laser pulse interactions with thin solid targets attract more and more interest *** proton acceleration mechanisms requite complex and nonlinear. The main factors which affect the ion acceleration at the rear side of the target heated by the femtosecond laser pulses are:laser pulse absorption efficiency,opening angle of the hot-electrons,hot-electron

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Chinese Chemical Letters 2008年第9期19卷 1096-1098页

作者： yong Zhao Li Bin Yang sheng Xiong huang Wei Lie Xiao Jian Xin Pu Li Mei Li Quan Bin Han Han Dong Sun State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany Chinese Academy of Sciences Kunming 650204 China College of Chemistry and Engineering Yunnan Normal University Kunming 650092 China Graduate University of Chinese Academy of Sciences Beijing 100039 China

Two new ent-kaurane diterpenoids, minheryins H （1） and I （2）, were isolated from the leaves of Isodon henryi. Their structures were elucidated by means of spectroscopic analysis, including 2D NMR spectra.

关键词： lsodon henryi Labiatae ent-Kaurane diterpenoid

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催化材料调控室温钠硫电池性能的进展与挑战

铜业工程 2024年第2期 106-118页

作者：金牛黄倩倩王黎丽邓崇海梁升胡磊刘伶俐梁鑫合肥大学能源材料与化工学院安徽合肥230031

室温钠硫电池因理论能量密度高(1274 Wh/kg,基于硫的质量)、资源丰富、价格低廉等优势,在大规模储能、动力电池领域备受青睐。然而,要实现Na-S电池中良好的可逆性、可循环性、活性物质高利用率,最终实现钠硫电池的商业化仍然极具挑战性... 详细信息

室温钠硫电池因理论能量密度高(1274 Wh/kg,基于硫的质量)、资源丰富、价格低廉等优势,在大规模储能、动力电池领域备受青睐。然而,要实现Na-S电池中良好的可逆性、可循环性、活性物质高利用率,最终实现钠硫电池的商业化仍然极具挑战性。不仅需要解决多硫化物溶解和循环过程中的多硫化物“穿梭效应”问题,还要解决因S_(8)和Na_(2)S的低电导率和固体Na_(2)S_(2)/Na_(2)S沉积带来的高极化所导致的循环性能差和存在的安全隐患等问题。因此合理引入催化材料促进多硫化物的快速转化,加快反应动力学至关重要,也是实现室温钠硫电池商业化应用的关键所在。本文详细综述了室温钠硫电池的基本原理、存在的主要问题,并阐述了催化作用在室温钠硫电池中的重要意义;归纳了室温钠硫电池中常用的催化材料种类;总结了各种催化材料与多硫化物之间的相互作用机理。最后,对室温钠硫电池中催化材料相关研究可能面临的挑战和未来发展方向进行了预测。

关键词：高能量密度室温钠硫电池催化材料多硫化物

Direct electron acceleration by chirped laser pulse in a cylindrical plasma channel

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Chinese Physics B 2020年第8期29卷 255-263页

作者： yong-Nan hu Li-Hong Cheng Zheng-Wei Yao Xiao-Bo Zhang Ai-Xia Zhang Ju-Kui Xue College of Physics and Electronics Engineering Northwest Normal UniversityLanzhou 730070China School of Science Guizhou University of Engineering ScienceBijie 551700China

We study the dynamics of single electron in an inhomogeneous cylindrical plasma channel during the direct acceleration by linearly polarized chirped laser *** adjusting the parameters of the chirped laser pulse and the plasma channel,we obtain the energy gain,trajectory,dephasing rate and unstable threshold of electron oscillation in the *** influences of the chirped factor and inhomogeneous plasma density distribution on the electron dynamics are discussed in *** find that the nonlinearly chirped laser pulse and the inhomogeneous plasma channel have strong coupled influence on the electron *** electron energy gain can be enhanced,the instability threshold of the electron oscillation can be lowered,and the acceleration length can be shortened by chirped laser,while the inhomogeneity of the plasma channel can reduce the amplitude of the chirped laser.

关键词： chirped laser pulse plasma channel laser-plasma interaction electron acceleration

“清肺调气汤”通过调节肠道菌群结构减少肺癌患者免疫检查点抑制剂治疗相关不良反应

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现代肿瘤医学 2024年第5期32卷 890-895页

作者：王潇陈华春洪伟玲杨雨顺王胜王超越胡小勤吴晓虞金华高等研究院浙江金华321000 浙江师范大学行知学院浙江金华321000 浙江金华广福肿瘤医院浙江金华321000 南京大学江苏南京210023

目的:探讨清肺调气汤(QFTQT)对接受免疫检查点抑制剂(immune checkpoint inhibitors,ICIs)治疗的晚期非小细胞肺癌(non-small cell lung cancer,NSCLC)相关不良反应及肠道菌群结构的影响。方法:将59例计划接受ICIs治疗的晚期NSCLC患者(... 详细信息

目的:探讨清肺调气汤(QFTQT)对接受免疫检查点抑制剂(immune checkpoint inhibitors,ICIs)治疗的晚期非小细胞肺癌(non-small cell lung cancer,NSCLC)相关不良反应及肠道菌群结构的影响。方法:将59例计划接受ICIs治疗的晚期NSCLC患者(男性53例,女性6例,年龄18~75岁)随机、双盲分为两组:干预组(中药组,n=29)每个免疫治疗周期提供清肺调气汤200 mL/bid,持续7 d;对照组(非中药组,n=30)不提供中药。评价分析两组患者ICIs治疗前后的不良反应及中医临床证候评分(clinical syndrome score of traditional Chinese medicine,SLEFI)。此外,两组各随机选取10例患者收集粪便样本,并使用Illumina(San Diego,CA) MiSeq(PE2×300 bp)平台对16S rRNA的V3-V4区域进行肠道菌群测序。结果:接受清肺调气汤治疗的晚期NSCLC患者免疫检查点抑制剂相关不良反应(immune checkpoint inhibitor-related adverse events,irAEs)显著低于对照组,并与肠道菌群有关。结论:清肺调气汤可通过调节肠道菌群结构,有效调节NSCLC患者irAEs。

关键词：中药免疫治疗不良反应肠道菌群

Non-Neutral-plasma Isothermal Expansion into a Vacuum

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Non-Neutral-plasma Isothermal Expansion into a Vacuum

作者： huANG yong-sheng

The ion acceleration by ultraintense,ultrashort laser pulses has been a major subject of great interest for many *** target normal sheath acceleration(TNSA) model is the most commonly accepted model for ion acceleration,which has been validated by many experiments and particle in cell simulations. However,the theoretical foundation for the TNSA model is as follows:the self-similar expansion of a plasma into a vacuum is not rational in the ultrashort,ultraintense laser-solid *** fact,the

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支持向量机及在电力系统中的应用

高电压技术 2007年第4期33卷 101-105页

作者：胡国胜安庆师范学院计算机与信息学院

支持向量机是20世纪60年代开始研究,在90年代得到快速发展的机器学习技术。为了系统地归纳统计学习理论与支持向量机的基本思想和算法,总结目前该领域的最新研究成果。通过对7种多分类支持向量机训练算法进行深入分析,得出其各算法的优... 详细信息

支持向量机是20世纪60年代开始研究,在90年代得到快速发展的机器学习技术。为了系统地归纳统计学习理论与支持向量机的基本思想和算法,总结目前该领域的最新研究成果。通过对7种多分类支持向量机训练算法进行深入分析,得出其各算法的优、缺点,还归纳了支持向量机在故障预测和识别、电力系统等方面的应用,特别在电力系统暂态稳定评估与分析、电机故障诊断、高压输电线路故障诊断和定位、双凸极永磁发电机非线性模型、火焰监测以及电力系统负荷预测等方面的成功应用。研究表明,支持向量机克服了传统神经网络算法的局部最优、收敛难以控制、结构设计困难等优点。

关键词：统计学习理论支持向量机多分类算法电力系统故障诊断负荷预测

Mechanisms of organized atrial tachycardia during catheter ablation of chronic atrial fibrillation by stepwise approach

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Chinese Medical Journal 2010年第7期123卷 852-856页

作者： NING Man DONG Jian-zeng LIU Xing-peng YU Rong-hui LONG De-yong TANG Ri-bo SANG Cai-hua MA Chang-sheng Department of Cardiology Beijing Anzhen Hospital Capital Medical University Beijing 100029 China

Background Extensive atrial fibrillation （AF） ablation is associated with an increased success rate of catheter ablation in chronic AF patients and an increased rate of atrial tachycardia （AT） during the procedure. The mechanism of these Ats varies in previous studies. Our study aimed to report the mechanism of organized AT occurring during the stepwise ablation procedure of chronic *** A prospective cohort of 86 consecutive patients who underwent an ablation procedure for chronic atrial fibrillation （CAF） was investigated. The stepwise procedure was performed in the following order： circumferential pulmonary vein ablation, complex fractionated atrial electrograms ablation, mapping and ablation of AT. The endpoint was noninducibility of AF/AT after sinus rhythm （SR） was restored or the procedure time was beyond 6 *** Sixty-nine （80%） of patients converted to SR via AT. A total of 179 sustained ATs were observed in 69 patients during the procedure. There were 81% （n=145） macroreentrant ATs which included 65 perimitral circuits, 48 peritricuspid tachycardia and 32 roof dependent circuits, 12% （n=21） localized reentrant and 7% （n=13） focal ATs. Thirty （15%） patients experienced significant left atrium （LA） and LA appendage （LAA） conduction delay or dissociation in the procedure or during the follow-up *** Most CAF patients converted to SR via ablation of organized AT occurring during the stepwise procedure. The mechanism of most of these ATs was macro-reentry.

关键词： organized atrial tachycardia chronic atrial fibrillation catheter ablation stepwise approach

Image Storage Based on Photoinduced Alignment in Azobenzene Liquid-Crystalline Films

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Chinese Physics Letters 1999年第8期16卷 565-567页

作者： WANG Chang-shun CHEN Guo-jian CHEN yong-mei WEI Zhen-qian YANG Yan-qiang FEI Hao-sheng Department of Physics Jilin UniversityChangchun 130023 Department of Physics Henan UniversityKaifeng 475001 Department of Applied Chemistry Beijing University of Chemical TechnologyBeijing 100029

Image storage based on photoinduced alignment in azobenzene liquid-crystalline films is *** reveal that the liquid-crystalline film possesses large photoinduced birefringence(Δ_(n)~10^(-2))and permanent optical storage *** photoinduced alignment process is used for storing *** is clearly demonstrated that the alignment of the azo chromophores as well as the stored image can be controlled by choosing the appropriate polarization of the irradiating light.

关键词： alignment crystalline benzene