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International Journal of Coal Science & Technology 2023年第2期10卷 169-180页

作者： P.n.Kuznetsov O.Yu.Fetisova L.I.Kuznetsova B.Avid B.Purevsuren Institute of Petroleum and Gas Siberian Federal UniversityKrasnoyarskRussia Institute of Chemistry and Chemical Technology SB RAS Federal Research Center"Krasnoyarsk Science Center SB RAS"KrasnoyarskRussia Institute of Chemistry and Chemical Technology Mongolian Academy of SciencesUlaanbaatarMongolia

The chemical composition,structural and plastometric properties of different-ranked coals from Mongolia deposits were *** non-isothermal iso-conversion Ozawa-Flynn-Wall and Friedman model-free methods were used to assess kinetic parameters and to differentiate decomposition *** peculiarities of the pyrolysis kinetics of brown and bituminous coals were revealed and discussed in terms of the composition and plastometric *** coal was shown to undergo three decomposition steps with ever increasing activation energy as temperature increased because of the decomposition of thermally more and more stable molecular *** pyrolysis of bituminous coals occurred in four steps,the activation energy having extreme mode of temperature *** important new finding was that the temperature range of the second,major pyrolysis step well corresponded to that between the softening and re-solidification temperatures according to Gieseler *** yield and composition of the pyrolysis products obtained under isothermal conditions were also characterized depending on coal rank and temperature,and the ways for qualified utilizations were offered.

关键词： Coal Pyrolysis Thermogravimetry Plastometry Activation energy

A case of methicillin-resistant Staphylococcus aureus infection following bile duct stenting

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World Journal of Gastroenterology 2005年第9期11卷 1396-1398页

作者： Markus K Diener Alexis Ulrich Theresia Weber Moritz n Wente Markus W Büchler Helmut Friess Department of General Surgery

AIM: To present a case of methicillin-resistant Staphylococcus aureus (MRSA) infection following bile duct stenting in a patient with malignant biliary ***: A 78-year-old male patient was admitted to a community hospital with progredient painless jaundice lasting over two weeks, weight loss and sweating at *** a stent should be implanted pre-operatively in jaundiced patients or whether these patients should directly undergo surgical resection, was ***: ERC and a biopsy from the papilla of Vater revealed an adenocarcinoma. In addition, a 7-Ch plastic stent was placed into the common bile duct. Persistent abdominal pain, increasing jaundice, weakness and indigestion led to the transfer of the patient to our hospital.A pylorus-preserving pancreatoduodenectomy wasperformed. Intraoperatively, bile leaked out of the transected choledochus andthe stent was found to be dislocated in the duodenum. A smear of the bile revealed an infection with MRSA, leading to post-operative isolation of the ***:As biliary stents can cause severe infection of the bile, the need for pre-operative placement of biliary stents should be carefully evaluated in each individual case.

关键词： Methicillin-resistant Staphylococcus aureus Bile Infection Stent Biliary obstruction Malignancy Surgery

International validation of the Chinese University Prognostic Index for staging of hepatocellular carcinoma: a joint United Kingdom and Hong Kong study

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Chinese Journal of Cancer 2014年第10期33卷 481-491页

作者： stephen L.Chan Philip J.Johnson Frankie Mo Sarah Berhane Mabel Teng Anthony W.H.Chan Ming C.Poon Paul B.S.Lai Simon Yu Anthony T.C.Chan Winnie Yeo State Key Laboratory in Oncology in South China Sir YK Pao Center for CancerDepartment of Clinical OncologyHong Kong Cancer Institute and Prince of Wales HospitalThe Chinese University of Hong Kong School of Cancer Sciences University of Birmingham the Department of Molecular and Clinical Cancer Medicine Institute of Translational MedicineUniversity of Liverpool Department of Anatomical Cellular and PathologyThe Chinese University of Hong Kong Department of Surgery The Chinese University of Hong Kong Department of Radiology and Organ Imaging The Chinese University of Hong Kong

The outcome of hepatocellular carcinoma(HCC) patients significantly differs between western and eastern population centers. Our group previously developed and validated the Chinese University Prognostic Index(CUPI) for the prognostication of HCC among the Asian HCC patient population. In the current study, we aimed to validate the CUPI using an international cohort of patients with HCC and to compare the CUPI to two widely used staging systems, the Barcelona Clinic Liver Cancer(BCLC) classification and the Cancer of the Liver Italian Program(CLIP). To accomplish this goal, two cohorts of patients were enrolled in the United Kingdom(UK; n = 567; 2006-2011) and Hong Kong(HK; n = 517; 2007-2012). The baseline clinical data were recorded. The performances of the CUPI, BCLC, and CLIP were compared in terms of a concordance index(C-index) and were evaluated in subgroups of patients according to treatment intent. The results revealed that the median follow-up durations of the UK and HK cohorts were 27.9 and 29.8 months, respectively. The median overall survival of the UK and HK cohorts were 22.9 and 8.6 months, respectively. The CUPI stratified the patients in both cohorts into three risk subgroups corresponding to distinct outcomes. The median overall survival of the CUPI low-, intermediate-, and high-risk subgroups were 3.15, 1.24, and 0.29 years, respectively, in the UK cohort and were 2.07, 0.32, and 0.10 years, respectively, in the HK cohort. For the patients who underwent curative treatment, the prognostic performance did not differ between the three staging systems, and all were suboptimal. For those who underwent palliative treatment, the CUPI displayed the highest C-index, indicating that this staging system was the most informative for both cohorts. In conclusion, the CUPI is applicable to both western and eastern HCC patient populations. The performances of the three staging systems differed according to treatment intent, and the CUPI was demonstrated to be opti

关键词：香港英国预后肝癌验证国际大学中国

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超宽带多注速调管的模拟研究

电子与信息学报 2006年第1期28卷 180-184页

作者：沈斌丁耀根 Aleksandr n.Sandalov Vladimir E.Rodjakin Aleksandra n.Chashurina 中国科学院电子学研究所 Radiophysics Chair

本文介绍了多注速调管的发展历史和现状,以及速调管模拟软件的发展情况。用1．5维软件Klystron -MSU和2．5维软件Arsenal-MSU对超宽带多注速调管进行了设计计算,并对计算结果进行分析,得到了比较好的输出特性。计算结果表明可以实现该... 详细信息

本文介绍了多注速调管的发展历史和现状,以及速调管模拟软件的发展情况。用1．5维软件Klystron -MSU和2．5维软件Arsenal-MSU对超宽带多注速调管进行了设计计算,并对计算结果进行分析,得到了比较好的输出特性。计算结果表明可以实现该超宽带多注速调管,其带宽10-14％,增益40-50dB,效率40-50％。

关键词：多注速调管 Klystron-MSU Arsenal-MSU 电子注通过率输出特性

基于XeF(C-A)放大器的混合(固态/气态)超高功率飞秒激光系统(英文)

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光学精密工程 2011年第2期19卷 252-259页

作者： LOSEV V ALEKSEEV S IVAnOV n KOVALCHUK B MIKHEEVL MESYATS G PAnCHEnKO Yu PUCHIKIn A RATAKHIn n YASTREMSKY A Institute of High Current Electronics of Siberian Branch of Russian Academy of Sciences aveAkademichesky 2/3Tomsk 634055Russia Lebedev Physical Institute of Russian Academy of Sciences Leninsky Prospekt53119991 Russia

提出了基于前端发生器和终端放大器,使用光泵浦XeF（C-A）激活介质的太瓦级混合激光器（THL-100）系统。前端发生器由长532 nm的连续激光泵浦的钛宝石飞秒脉冲振荡器,脉冲展宽机构,532 nm的脉冲激光泵浦的再生多通道放大器,衍射光栅压... 详细信息

提出了基于前端发生器和终端放大器,使用光泵浦XeF（C-A）激活介质的太瓦级混合激光器（THL-100）系统。前端发生器由长532 nm的连续激光泵浦的钛宝石飞秒脉冲振荡器,脉冲展宽机构,532 nm的脉冲激光泵浦的再生多通道放大器,衍射光栅压缩器和二次谐波发生器（KDP）组成。其光束输出参数为：脉冲持续时间50 fs,二次谐波（475 nm）辐射能量5 mJ。前端发生器以10 Hz的单脉冲模式工作。XeF（C-A）放大器由双高压脉冲发生器（线性变压器）,爆炸式阴极发射真空二极管,电子束注入系统,充满Xe的气室转换器和激光单元组成。高压发生器包括12个变压器,每个变压器有8个电容（40 nF）和火花隙,电容可以充电至100 kV。真空二极管中的电子束参数为：总电流300 kA,峰值电压550kV,脉冲持续时间约150 ns。穿透金属箔片到达Xe转换器的6个100 cm×12 cm电子束的总能量为67 kJ。激光系统通过泵浦能量的级联处理导致Xe2＊的快速形成,并在（172±5）nm连续辐射。真空紫外辐射通过CaF2窗口辐射到含有XeF2蒸汽和氮气缓冲气体的激光单元中,使XeF2光解,形成XeF＊准分子。由真空紫外辐射泵浦的放大器激活介质长110 cm,直径为24 cm。文中通过数值模拟给出了输出参数和第一实验结果,根据XeF（C-A）放大器参数模型和增益测量结果,得到的输出能量高达23 J,这意味着50 fs脉冲的峰值功率高达4060 TW。

关键词：混合激光器 XeF(C—A)放大器飞秒脉冲宽度电子束紫外转换器

Beam breakup simulation study for a high energy ERL

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Chinese Physics C 2015年第1期39卷 98-102页

作者：陈思 M.Shimada n.nakamura 黄森林刘克新陈佳洱 School of Physics University of Chinese Academy of Sciences State Key Laboratory of nuclear Physics and Technology Institute of Heavy Ion PhysicsPeking University KEK Oho 1-1 TsukubaIbaraki 305-0801Japan

The maximum beam current that can be accelerated in an energy recovery linac （ERL） can be severely limited by the transverse multi-pass beam breakup instability （BBU）, especially in future ERL light sources with multi-GeV high energy beam energy and more than 100 mA average current. In this paper, the multi-pass BBU of such a high energy ERL is studied based on the simulation of a 3-GeV ERL light source that is proposed by KEK. This work is expected to provide a reference for future high energy ERL projects.

关键词： energy recovery linac beam breakup higher order mode

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哲学与现代派艺术

Low-temperature alteration of uranium–thorium bearing minerals and its significance in neoformation of radioactive minerals in stream sediments of Wadi El-Reddah, north Eastern Desert, Egypt

作者： (苏)n.C.库列科娃

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Acta Geochimica 2020年第1期39卷 96-115页

作者： O.A.Ebyan H.A.Khamis A.R.Baghdady M.G.El-Feky n.S.Abed Geology Department Faculty of ScienceAin Shams UniversityCairo 11566Egypt nuclear Materials Authority(nMA) P.O.Box 530El-MaadiCairoEgypt

The stream sediments of Wadi El Reddah(north Eastern Desert,Egypt)are geochemically and mineralogically *** content of radioactive and other heavy minerals is mainly represented by thorite,uranothorite,zircon,monazite,xenotime,columbite,fergusonite,and unknown rare earth elements(REEs)bearing minerals as well as *** emphasis on REE content of thorite,uranothorite,zircon and xenotime has been done to correlate them with the increase of uranium contents in these *** key evidence for the presence lowtemperature alteration processes includes the presence of some zircon crystals as remnants after complete dissolution of the overgrowth zircon in severe acidic environment,the sulphur content,biogenic minerals,occurrence of unusual minerals as cassiterite pore filling in zircon,variation in the REEs content from the surrounding granites to the stream sediments and the abundance of monazite in the surrounding *** minerals are partially and/or completely altered,which indicated by the pseudomorphism of zircon by xenotime,thorite,and uranothorite.

关键词： Zircon Thorite Xenotime Radioactive minerals Low-temperature alteration Wadi El-Reddah

Problems and Characteristics of Russian Platinum Metals Exporters

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贵金属 2012年第A1期33卷 284-286页

作者： AnDREEV A. M. KELCHEVSKAYA n. R. JSC "Ekaterinburg non-ferrous metals processing plant" The Urals Federal University by name of the first President of Russia Boris Yeltsin" Ekaterinburg Russia.

The paper revealed the place and role of Russia in the global market of platinum metals, highlighted features of pricing in the export of Russian platinum group metals, the main problems of pricing in the export contracts related to the instability of markets and imperfect currency and customs legislation of the Russian Federation, proposed innovative ways to solutions to existing problems in the preparation and conclusion of export contracts.

关键词： platinum metals Russia pricing export contracts customs duties customs fees customs value stock quotes discount

STUDY OF MIXED RARE EARTH METAL (REM) COnVERSIOnCOATInG On ALUMInUM ALLOY LY12

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Acta Metallurgica Sinica(English Letters) 2000年第5期13卷 1034-1038页

作者： Yu, X.W. Cao, C.n. Zhou, D.R. Yin, Z.D. Lab. for Corrosion and Protection Inst. of Corrosion and Protection Chinese Acad. of Sci. shenyang 110015 China Sch. of Mat. Sci. and Eng. Harbin Inst. of Technol. Harbin 150001 China

The process of mixed rare earth metal (REM) conversion coating on aluminum alloy LY12 (2024) was introduced. The corrosion resistance of mixed REM conversion coating was examined by using weight loss test and electrochemical method. The results show that the mixed REM conversion coating increases the corrosion resistance of the alloy surface. Examination result of scanning electron microscope (SEM) shows that the coating exhibits honeycomb-like feature. X-ray diffraction (XRD) analysis reveals that the coating is amorphous. The result of X-ray photoelectron spectroscopy (XPS) indicates that mixed REM conversion coating consists predominantly of Ce and O. The contents of other rare earth elements (La, Pr) are relatively low.

关键词： Aluminum alloys Composition Corrosion resistance Inorganic coatings Morphology