mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
抗逆高羊茅新品种黔草1号的特征特性

介绍了抗逆高羊茅新品种黔草1号（Festuca arundinacea Schreb.cv.Qiancao No.1）的育种过程及其优良特性。在贵州省及四川、广西、新疆等地种植的种子平均产量比对照品种凌志和原始群体高出20%以上。返青期比引进品种凌志提前7天,枯黄期晚3天;是目前我国育成的自主知识产权优良抗逆草坪型新品种,是运动场草坪、环境绿化、生态治理和改良天然草场的理想草种之一。适宜我国长江中下游低山、丘陵等地区种植。
不同激素浓度对思茅松扦插苗生根性状的影响

用吲哚-3-乙酸和ABT1号生根粉的不同浓度处理1年生穗条,在大田中扦插。经过统计,用吲哚-3-乙酸处理的穗条理论成活率最大值为48.52%（实际56.1%）,平均不定根生根数量理论上可达9.8条/株,平均不定根长度理论上可达10cm;用ABT1号生根粉处理的穗条理论成活率最大值为45.35%（50.6%）,平均不定根生根数量理论上可达10条/株;平均不定根长度理论上可达7.9cm。
贵州省林木种苗产业现状及发展思路

在分析贵州省林木种苗产业现状和存在问题的基础上,提出了今后的发展思路和发展对策,即建立和完善林木种苗生产供应体系、行政执法和质量监督检验体系、科技创新和新技术推广应用体系以及社会化服务体系。
论贵州林木良种生产与推广使用对策

现代林业的全面推进,逐步显示了贵州省林木良种在林业生产和推广应用中的滞后性。新形势下要求加大林木良种生产和推广使用力度。就目前贵州省林木良种生产及使用情况,分析阐述了贵州省林木良种推广使用的主要问题,对如何加大贵州省林木良种生产和推广使用力度提出意见和对策。
黑绛丹治疗放射性皮炎30例

黑绛丹来源于刘禹锡“鸡子乱发膏”，由蛋黄油、血余炭两味药物组成。我们曾应用黑绛丹治疗放射性皮肤溃疡，患者创面愈合时间较对照组明显缩短。为进一步证明黑绛丹治疗放射性皮肤损伤的确切疗效。2005年以来我们应用黑绛丹治疗放射性皮炎，观察其疗效。现报告如下。
肠球菌耐药性研究及治疗对策

目的研究肠球菌的分布及耐药特点，探讨治疗对策，指导临床合理用药。方法对本院临床标本中分离的217株肠球菌，利用传统生化反应鉴定到种，必要时采用API或VITEK2全自动微生物鉴定及药敏系统，药敏分析以纸片扩散法（KB法）进行抗生素敏感试验，对高浓度庆大霉素、万古霉素、替考拉宁中介或耐药者以琼脂稀释试验证实，试验数据利用“WHONET5．3”软件分析处理。结果粪肠球菌和屎肠球菌占总体的97．24％；居前3位的标本依次为尿液（60．37％）、生殖系统分泌物（27．65％）、胆汁（5．07％）；氨基糖苷类高水平耐药的肠球菌（HLAR）分离率为67．28％；氨苄西林耐药的肠球菌（ARE）分离率为36．41％；万古霉素耐药的肠球菌（VRE）分离率为0；屎肠球菌对常用抗生素的耐药率明显高于粪肠球菌，但对四环素的耐药率低于粪肠球菌。结论肠球菌多重耐药严重，治疗肠球菌感染应针对菌种及耐药特性选择抗生素。
网络安全与防火墙技术

网络安全技术是一门涉及计算机科学、网络技术、通信技术、密码技术、信息安全技术、应用数学、数论、信息论等多学科的综合性学科。随着Internet的迅速发展，网络安全问题日益严重，网络安全技术也被人们重视起来。解决网络安全问题的重要手段就是防火墙技术。文中首先对计算机网络安全中的防火墙技术进行了概述，然后论述了网络防火墙安全技术的分类及其主要技术特征，最后对防火墙的未来发展趋势进行了简单的介绍。
子宫肌瘤专题讨论——子宫肌瘤的鉴别诊断

大多数无症状的子宫肌瘤患者，仅仅在常规体检或产前检查时，通过B型超声检查而发现，或者在进行其他妇产科手术时发现，还有一部分无症状的患者可能终生都没有被诊断。有症状子宫肌瘤的诊断与其他疾病一样，诊断仍然依靠病史、体检及辅助检查三方面来综合判断。对子宫肌瘤而言，诊断并不困难。然而有时因与其他疾病有相似的症状和体征，并且可能与其他疾病合并存在，此时则需要进行鉴别诊断。
子宫肌瘤恶变的诊断与治疗

国外文献报道子宫肌瘤恶变（malignant degeneration）率为0．13％-2．02％，国内报道为0．4％。0．8％。子宫肌瘤恶变多发生在40岁以后的妇女，尤其是绝经后女性。平滑肌肉瘤为最常见的恶变类型，恶性间叶瘤为罕见的恶变类型。尽管子宫平滑肌肉瘤是一种恶性程度极高的肿瘤，预后很差；但肌瘤肉瘤变患者，预后相对较好，尤其是有包膜者。本文主要讨论子宫肌瘤恶变为平滑肌肉瘤的诊断与治疗。
三七各部位单体皂苷成分研究进展与活性利用探讨

本文对三七中各部位单体皂苷（达玛烷型四环三萜）类的研究进展进行了综述。迄今已从三七的不同部位分离得到70余种单体皂苷成分，其中根部位41种，茎叶部位23种，果梗部位12种，果实及种子部位9种，花蕾部位13种，根茎（剪口）部位33种。本文还对三七单体皂苷的活性利用进行了探讨。
鱼腥草注射液中癸酰醋酸的高效液相色谱定性分析

目的：探讨鱼腥草注射液中是否存在癸酰醋酸。方法：采用高效液相色谱进行定性分析。结果：建立了癸酰醋酸HPLC定性分析方法。结论：鱼腥草素能转化为癸酰醋酸，而鱼腥草注射液样品中未检测出癸酰醋酸，排除癸酰醋酸为鱼腥草注射液中引起不良反应的成分。
生理盐水中盐酸吗啡注射液的稳定性考察

目的：考察生理盐水中盐酸吗啡注射液的稳定性，并比较其放置于常规和避光注射器内稳定性的差异。方法：盐酸吗啡注射液溶于生理盐水中配制成0.100g·L~(-1)的溶液，分别置于50mL常规或避光注射器内，日光灯下，经0，2，4，6，8，12，24h观察溶液外观变化，并测定溶液pH值，采用HPLC法测定盐酸吗啡的浓度，并比较常规和避光注射器内溶液pH值、浓度的改变。结果：盐酸吗啡溶液置于常规或避光注射器中24h内外观及’pH值均无明显变化，在常规注射器中浓度经4h下降至0h的88.51％；在避光注射器中浓度经4h下降至0h的91.60％，6h下降至86.97％。结论：盐酸吗啡注射液用生理盐水稀释后，在常规注射器内其稳定性较差，在避光注射器中应6h内使用完毕。
银杏磷脂胶囊治疗冠心病心绞痛的临床疗效观察

目的：观察银杏磷脂胶囊治疗冠心病心绞痛的临床疗效。方法：将63例静息心电图均有不同程度心肌缺血改变的冠心病心绞痛患者随机分为治疗组和对照组。2组在常规治疗的基础上分别口服银杏磷脂胶囊和银杏叶胶囊。治疗前后行心电图、血液流变学、血脂、纤维蛋白原和肝肾功能指标检测及静息状态下的血压和心率测量，记录·心绞痛发作的频率、持续时间和硝酸甘油用量，评价·心绞痛疗效。结果：①2组治疗后临床症状、心电图均有改善；②2组治疗后·心绞痛发作频率、持续时间和硝酸甘油用量均显著低于治疗前；③2组治疗后相关血液流变学指标均较治疗前显著降低；④2组治疗后总胆固醇、三酰甘油、低密度脂蛋白胆固醇和纤维蛋白原均较治疗前显著降低，且治疗组均优于对照组。结论：在常规治疗的基础上，联合使用银杏磷脂胶囊可以显著提高冠·心病心绞痛患者的临床疗效。
110kV国桥线电缆接头故障分析及处理

为了查找110 kV国桥线电缆接头故障原因,从故障电缆接头安装工艺、交叉互联系统的连接和工程验收、运行管理等方面进行了深入分析。确定了故障原因由电缆金属护层连接错误和接头铜套与电缆铝套电气连接不良两个因素组成。对金属护层的连接错误进行了整改,强调了选择合理的接头安装工艺、加强施工质量管理及加强金属护层感应电压和环流监测的重要性。
500kVSF_6气体绝缘TA损坏及防范措施

2006年山东电力系统内共发生了3起500 kV SF_6气体绝缘电流互感器（TA）损坏事件,为对3起事件的发生经过、检查情况进行介绍、总结,结合SF6气体绝缘TA结构特点,对损坏原因进行了分析：两起是因运输不当造成内部部件移位或绝缘件受伤;一起因制造质量不良紧固螺丝松动引起。其后果使TA内部电场发生畸变,绝缘性能下降,在运行一段时间后主绝缘发生击穿或直接击穿。并根据原因分析结果提出了除按照有关反措要求加强运输质量的控制外,还应加强验收管理,并积极开展简单有效的气体绝缘TA内部绝缘状况检测方法的研究。
利用CDEGS软件比较分析铜和钢接地网的性能

为了研究铜材接地网和钢材接地网的各方面性能,使用CDEGS软件详细计算、分析和比较铜材接地网和钢材接地网在最严重故障条件下的性能。结果表明,在相同的接地网结构和土壤条件下,铜材接地网的接地阻抗、网内电位差、故障点附近的地电位升、最大接触电势和跨步电势等参数均比钢材接地网要小得多,但铜材造价较高,且需要安装阴极保护,故是否大规模使用铜材接地网仍有待讨论。
Effect of Barrier Materials on Discharge Properties in Air at Low Pressure

Dielectric barrier discharge（DBD） is widely investigated in order to obtain uniform low-temperature plasma.Many studies have proved that some barrier materials,especially electrets,can improve the uniformity of discharge.It is regarded as an available way to get atmospheric pressure glow discharge（APGD）.In this paper,discharge forms with 4 different barrier materials（alumina,quartz,PTFE and PET） are investigated,and the transition of discharge form depending on the air pressure are recorded to estimate the influence of barrier materials on discharge.By using electrets as barrier materials,homogeneous discharges can be obtained in a more wide pressure range.Under the same experimental conditions,discharges with electrets are more uniform or have larger uniform areas due to the storage and desorption of charges on the surface of electrets.The electrons deposited in the surface layer can be released on next half cycle when the polarity of the applied voltage changes,and provide a number of seed electrons,which makes the discharge more homogeneous.The capacitance and the permittivity of barrier materials have no effect on the discharge form directly.
ERCC1与顺铂耐药的研究进展

顺铂广泛应用于恶性肿瘤的化疗,但耐药性的产生严重影响其疗效。顺铂耐药的机制尚不十分清楚,目前普遍认为核苷酸切除修复（nucleotide excision repair,NER）是顺铂耐药的重要机制之一。NER途径是一个复杂的过程,其中DNA损伤的识别/切除为其限速步骤。ERCC1是一种高度保守的DNA核酸内切酶,是NER途径的限速酶。ERCC1基因的表达产物与DNA修复酶缺乏互补基因F（XPF）形成紧密的异二聚体（ERCC1-XPF）,该二聚体具有识别损伤和5′端切除的双重作用,在NER中起到限速或调节的重要作用。对卵巢癌、宫颈癌、睾丸癌、膀胱癌及非小细胞肺癌等的研究表明ERCC1的表达与顺铂耐受性相关。抑制ERCC1的表达可克服顺铂耐药性,提高治疗效果。
~(125)Ⅰ放射性粒子治疗胰腺癌术后并发症分析

我们采取开腹手术方式,在彩色多普勒引导下行^125Ⅰ放射性粒子肿瘤内永久植入加胆肠Roux-en-Y吻合手术治疗不能手术切除的胰腺癌10例,8例出现术后并发症,现分析报告如下。
延边地区朝鲜族和汉族脑卒中后抑郁症的临床对比研究

延边地区位于吉林省东部，人口220刀，其中朝鲜族占40％、汉族占48％，其余为满族、回族等民族。我们于2002年3月～2005年10月对我院神经内科入院的患脑卒中朝、汉民族患者进行抑郁、焦虑量表检测，以便分析两个民族的脑卒中后抑郁症（Post—stroke depression，PSD）的原因，为临床治疗提供科学的依据。
依法科学做好职业病诊断鉴定，促进首都经济持续健康发展

《中华人民共和国职业病防治法》于2002年5月1日开始正式实施。在卫生部指导和北京市卫生局的领导下，北京职业病诊断鉴定委员会办公室，依靠科技和法律，认真做好职业病诊断鉴定管理工作，初步建立了适应首都经济社会发展的职业病诊断鉴定体制、工作模式和运行机制，现将工作进行大致分析。
中国的化学品环境管理

随着我国化学品产量、用量的不断加大，化学品安全问题日益成为关注焦点。从国际化学品管理发展来看，化学品管理包涵3个方面：健康安全（Health）、环境安全（Environment）和生产安全（Safety）。现介绍了化学品环境安全管理的概念、原则和特点，分析了我国化学品环境管理的现状和存在问题，并提出了实施良好管理（Good govemance）的对策建议。
测定植物体内氯离子含量的滴定法和分光光度法比较

以耐盐性较强的大麦（Triticum aestivum）品种‘鉴4’幼苗为材料，比较硝酸银滴定法与分光光度法（分别以明胶-乙醇水溶液和丙酮作为胶体保护剂）测定植物体内氯离子含量的结果表明，无论是实验数据的准确性和重现性，还是实验操作的简便性，分光光度法（特别是以明胶-乙醇水溶液作为胶体保护剂）都优于滴定法。
缩节胺在脱毒马铃薯组培快繁中的应用

马铃薯（Solanum tuberosum L．）组培快繁中脱毒苗的长期继代会造成试管苗徒长细弱，根系不发达，繁殖系数低，移栽成活率低和试管薯产量小。1，1-二甲基哌啶嗡氯化物（1，1-Dimethyl piperidylium chloride，DPC），商品名为缩节胺，是一种低毒内吸性植物生长延缓剂，施用后，植株节间缩短，茎秆粗壮，叶色浓绿，叶片加厚，根系生长发达。本文探讨DPC在马铃薯试管苗壮苗、增殖、移栽、保存中的作用，以期能为马铃薯试管苗的工厂化生产和保存提供参考。
甲泼尼龙冲击联合血液净化治疗蜂毒所致溶血的效果

目的观察甲泼尼龙冲击联合血液净化治疗蜂毒所致溶血性贫血的疗效。方法18例胡蜂蜇伤溶血的患者入院后进行持续性血液滤过和血浆置换，同时使用甲泼尼龙1g／d加入5％葡萄糖250ml中静脉滴注，溶血终止一两天后甲泼尼龙逐渐减量至停用，此后透析方式改为单纯血液透析。结果治疗两三天后患者的溶血均得到控制，1例并发腹膜炎者腹痛消失，2例并发消化道出血者出血停止。16例治愈，2例死于中枢性呼吸衰竭。结论甲泼尼龙冲击联合血液净化能有效治疗蜂毒所致的溶血，对其并发症消化道出血及腹膜炎也是有效和安全的。
Effect of Asymmetry in a Bistable System Subject to Multiplicative Colored Noise

By the method of the stochastic energetics, we investigate the stochastic resonance (SR) phenomenon of an overdamped Brown particle in an asymmetric bistable potential, driven by external periodical signal and multiplicative noise. The expressions have been obtained for the quasi-steady-state probability distribution function. It is found that the input energy (IE) pumped into the system by the external driving shows an SR-like behavior as a function of the noise strength, whereas the IE turns to be a monotonic function of the correlation time of the noise. The effect of potential asymmetry is also studied on SR and IE.
早产的免疫学机制及诊治

关于早产的定义及对早产的认识经历过不同的阶段,目前我国的早产定义是自末次月经第1天开始计算,妊娠28周至37足周间终止者.早产是发展中国家新生儿死亡和发生并发症的主要原因之一.由于对早产病因学研究的重视,在该领域已取得较大进展,但仍有部分病因不明,因此其发病机制尚未完全阐明,对早产的发生尚难以预防.
水稻芽种偏心顶杆式精量播种机设计

水稻芽种脆性大、含水率高、强度低,现有的水稻播种机大都不能满足直播要求.播种机的排种器采用偏心机构,由种轮带动推种杆、连杆等运动,偏心轴固定不动,推种杆在种轮中伸缩,推种杆与种轮形成的型孔深度随推种杆的运动而变化,从而实现播种机的精量排种.室外试验表明,播种破胸芽种时每穴1～3粒种子合格率达95%以上,破碎率低,能满足水稻芽种的精量播种要求.
婴儿心脏移植术围术期的麻醉处理1例

患儿,男性,8个月,体重8.3 kg,身高69 cm,体表面积0.38 m2,心功能Ⅲ级.诊断为先天性心脏病(紫绀型)、右心室双出口(SDD型)、肺动脉狭窄合并单心房、完全性房室隔缺损和完全性肺静脉异位引流(心下型).
Compositional design and microstructure analysis of Zr-based bulk metallic glasses

The systematical studies of Zr-based BMGs were summarized in terms of their compositional design and their structural characterization. In particular, several key issues of BMG materials were focused, including initial alloy design and subsequent composition optimization, solidification microstructure characterization and crystallization process specification. The results show that a compositional designing approach is successfully developed and, through extensive microstructure characterization using transmission electron microscopy, several new crystalline phases are discovered in these newly developed Zr-based BMG alloys. Crystallization behavior of Zr-based BMG is also determined based on the microstructure analysis.
Simulation of polycrystalline aluminum tensile test with crystal plasticity finite element method

The crystal plasticity was implemented in the finite element method(FEM) software ABAQUS through the user subroutine UMAT. By means of discretizing the space at the grain level with the Voronoi diagram method, a polycrystal model was built and used in the FEM analysis. The initial orientation of each grain was generated based on the orientation distribution function(ODF).The developed model was successfully applied in simulation of polycrystalline aluminium samples deformed by the tensile tests. The theoretical strain--stress relation was in good agreement with the experimental result. The simulation results show that the grain size has significant effect on the deformation behavior. The initial plastic deformation usually occurs at grain boundaries, and multiple slip often results in an enhanced local hardening at grain boundaries.
Fabrication of CTP/HAp novel gradient composite bioceramics

Calcium-titanium-phosphate(CaTi_4(PO_4)_6, CTP)/hydroxyapatite(HAp) is a kind of novel gradient composite bioceramics, which has excellent biocompatibility and bioactivity. CTP ceramic film was synthesized one-step on the surface of titanium using micro-arc oxidation(MAO). The CTP/HAp composite bioceramics were prepared by soaking CTP film in HAp inducing solution for several days. XRD, SEM and EDX were used to characterize the bio-ceramic films phase and composition, morphology and component. The influence of electrolyte molar ratio of Ca to P and the current density to the synthesis of film was studied, and the optimized value of parameters above were 1/6 and 15A/dm~2. The parameters of HAp inducing solution, such as component and pH value were also studied and the best pH value which is adjusted by NaOH is 6.4.
Influence of Ga and Hg on microstructure and electrochemical corrosion behavior of Mg alloy anode materials

The effects of Hg and Ga on the electrochemical corrosion behavior of Mg-5%Hg (molar fraction) alloys were investigated by the measurement of polarization curves and galvanostatic test. The microstructure of the alloys and the corroded surface of the specimens were investigated by scanning electron microscopy, X-ray diffractometry and emission spectrum analysis. It can be concluded that the addition of 1%Ga (molar fraction) reduces corrosion current density from 26.98 mA/cm~2 to 2.34 mA/cm~2; while the addition of 1%Hg (molar fraction) increases corrosion current density. The addition of Ga and Hg both promotes the electrochemical activity of the alloys and the influence of Ga is more effective than Hg. Mg-5%Hg-1%Ga alloy has the best electrochemical activity, showing mean potential of -1.992 V. The activation mechanism of the magnesium alloy produced by Hg and Ga was put forward. Magnesium atoms are dissolved in liquid Hg and Ga to form amalgam and undergo severe oxidation at the amalgam/electrolyte interface.
Abrasive wear property of laser melting/deposited Ti_2Ni/TiNi intermetallic alloy

A wear resistant intermetallic alloy consisting of TiNi primary dendrites and Ti_2Ni matrix was fabricated by the laser melting deposition manufacturing process. Wear resistance of Ti2Ni/TiNi alloy was evaluated on an abrasive wear tester at room temperature under the different loads. The results show that the intermetallic alloy suffers more abrasive wear attack under low wear test load of 7, 13 and 25 N than high-chromium cast-iron. However, the intermetallic alloy exhibits better wear resistance under wear test load of 49 N. Abrasive wear of the laser melting deposition Ti_2Ni/TiNi alloy is governed by micro-cutting and plowing. Pseudoelasticity of TiNi plays an active role in contributing to abrasive wear resistance.
Preparation of novel core-shell nanoparticles by electrochemical synthesis

Nanostructural gold/polyaniline core/shell composite particles on conducting electrode ITO were successfully prepared via electrochemical polymerization of aniline based on 4-aminothiophenol (4-ATP) capped Au nanoparticles. The new approach to the fabrication included three steps: preparation of gold nanoparticles as core by pulse electrodeposition; formation of ATP monolayer on the gold particle surface, which served as a binder and an initiator; polymerization of aniline monomer initiated by ATP molecules under controlled voltage lower than the voltammetric threshold of aniline polymerization, which assured the formation of polyaniline shell film occurred on gold particles selectively. Topographic images were also studied by AFM, which indicated the diameter of gold nanoparticles were around 250 nm. Coulometry characterization confirmed the shell thickness of polyaniline film was about 30 nm. A possible formation mechanism of the Au/polyaniline core-shell nanocomposites was also proposed. The novel as-prepared core-shell nanoparticles have potential application in constructing biosensor when bioactive enzymes are absorbed or embedded in polyaniline shell film.
Insertion/removal kinetics of lithium ion in spinel LiCu_xMn_(2-x)O_4

The insertion/removal processes of lithium ion in spinel lithium manganese oxide(LiMn_2O_4) and copper doped spinel lithium manganese oxide (LiCuxMn_(2-x)O_4) on a powder microelectrode were studied by electrochemical impedance spectroscopy(EIS), cyclic voltammetry(CV) and X-ray diffractometry(XRD). The insertion/removal process of lithium ion in the spinel oxides consists of three steps: charge transfer of lithium ion on the surface of the spinel oxides, diffusion and occupation of lithium ion in the lattice of the spinel oxide. Similar to chromium, the doping of copper in spinel lithium manganese oxide results in the increase of the charge transfer resistance and the double layer capacitance for lithium insertion or removal, and the decrease of the diffusion coefficient of lithium ion in the lattice of spinel oxide. However, the insertion capacitance, a parameter reflecting the occupation of lithium ion in the lattice of the spinel oxide, is hardly influenced by the doping of copper. The influence of the doped copper on the kinetic process of lithium insertion/removal in spinel lithium manganese oxide is related to the contraction of spinel lattice.
Effect of activated carbon and electrolyte on properties of supercapacitor

Effect of activated carbon and electrolyte on electrochemical properties of organic supercapacitor was investigated. The results show that specific surface area and mesoporosity of activated carbon influence specific capacitance. If specific surface area is larger and mesoporosity is higher, the specific capacitance will become bigger. Specific surface area influences resistance of carbon electrode and consequently influences power property and pore size distribution. If specific surface area is smaller and mesoporosity is higher, the power property will become better. Ash influences leakage current and electrochemical cycling stability. If ash content is lower, the performance will become better. The properties of supercapacitor highly depend on the electrolyte. The compatibility of electrolyte and activated carbon is a determining factor of supercapacitor’s working voltage. LiPF_6/(EC+EMC+DMC) is inappropriate for double layer capacitor. MeEt_3NPF_4/PC has higher specific capacitance than Et_4NPF_4/PC because methyl’s electronegativity value is lower than ethyl and MeEt_3N+ has more positive charges and stronger polarizability than Et4N~+ when an ethyl is substituted by methyl.
Influence of Sc on high temperature strengthening behavior of Ti-6Al-4V alloy

Vacuum arc melting technique was used to prepare Ti-6Al-4V alloy containing Sc (0.3% and 0.5%, mass fraction). The ingots were melted twice by vacuum self-consumable electrode arc furnace. Forging of ingots was started in β-phase region and finished in high (α+β)-phase region. Annealing after forging was performed in low (α+β)-phase region for 30 min. Isothermal high temperature compression tests were conducted using thermal simulation machine under Ar atmosphere at 850 ℃ and 1 000 ℃, and the strain rate were 0.001, 0.01, 0.1 and 1.0 s~(-1). Optical microscope(OM), scanning electron microscopy(SEM), energy dispersive spectrum(EDS) and transmission electron microscope(TEM) were used to study the microstructure evolution during high temperature deformation. The results show that, the peak stress value of alloys increases with increasing Sc content after deformation at 850 ℃, however, there is no obvious strengthening of Sc when the alloys are deformed at 1 000 ℃. Sc exists as Sc_2O_3 forms by internal oxidation during forging procedure, only minor Sc solutes in matrix. At 850 ℃, the interaction between dislocation and participated particles and twinning mechanism controls the deformation procedure accompanied recrystallization. At 1 000 ℃, the deformation of alloys containing Sc is mainly controlled by twinning, while the deformation of alloy without Sc is not only controlled by twinning, but also the interaction between dislocation and precipitated particles inside the twinning lamellar.
High temperature deformation behavior and mechanism of spray deposited Al-Fe-V-Si alloy

Al-8.5Fe-1.3V-1.7Si alloy was prepared by spray deposition and hot extrusion. The high temperature plastic deformation behavior of the spray deposited Al-8.5Fe-1.3V-1.7Si alloy was investigated in the strain rate range of 2.77×10~(-4)-2.77×10(-2) s~(-1) and temperature range of 350-550 ℃ by Gleebe-1500 thermomechanical simulator. The mechanism of the high temperature plastic deformation of the alloys was studied by TEM associated with the analysis of Rosler-Artz physical constitutive relationship based on the model of dislocation detaching from dispersion particles. The results show that Al-Fe-V-Si alloy has low strain hardening coefficient, and even exhibits work softening. Stress exponent n and activation energy Q were calculated based on Zener-Hollomon relation and Rosler-Artz physical model respectively. The Rosler-Artz physical model can give a good prediction for the abnormal behavior of high temperature deformation of spray deposited Al-Fe-V-Si alloy, that is, n larger than 8 and Q higher than 142 kJ/mol. However, because of the highly refined microstructure, the high temperature deformation behavior of spray deposited Al-Fe-V-Si alloy deviates more or less from the law predicted by using Rosler-Artz physical model.
用于舟骨骨折的桡骨瓣及其血管

手术治疗舟骨骨折不愈合,常常需要植骨,方式有二,游离骨移植和血管蒂骨瓣移位.后者,类型多样,如血管蒂掌骨瓣移位、血管蒂桡骨瓣移位、旋前方肌蒂桡骨瓣移位、拇短展肌蒂舟骨结节瓣移位等,其中以血管蒂桡骨瓣移位最为流行.
HLA-Ⅰ、Ⅱ类基因与HBV感染预后相关性研究

近年来HLA等位基因与HBV相关性研究,相继有所报道[1],但因被研究人群种族、检测方法、实验设计方面的差异,研究结论也有所不同,因而HLA与乙型肝炎的相关性,目前尚无定论.我们随机选取HBV感染后不同临床类型患者,采用序列特异性引物-多聚酶链式反应(SSP-PCR)方法,进行了HLA-Ⅰ,Ⅱ类基因与HBV感染预后相关性研究,现将结果报道如下.
Saturation effects on Ba 6pnl (l = 0,2) and 6pnk (|M| = 0,1) autoionization spectra

Using a three-step laser saturation excitation technique, the saturation effects on the Ba 6pns (J = 1) and 6pnd (J = 1, 3) autoionization spectra are observed systemically in zero field. These saturation spectra are introduced to determine the high n members of 6pnl (l = 0, 2) autoionizing series and are used to analyse the channel interactions among the autoionizing series in zero field. Furthermore, the saturation excitation technique is applied to the electric field case, in which the saturation spectra of Ba 6pnk (|M| = 0, 1) autoionizing Stark states are measured. Most of these saturation spectra are observed for the first time so far as we know, which indicate the mixing of the autoionizing states in the electric fields.
First-principles study on the electronic structure and optical properties of Tl_2Cd_2(SO_4)_3 and Rb_2Cd_2(SO_4)_3

With the help of ab initio full-potential linearized augmented plane wave (FPLAPW) method, calculating the electronic structure and linear optical properties is carried out for XCd_2(SO_4)_3 (X =Tl, Rb). The results show that Tl_2Cd_2(SO_4)_3 (TlCdS) has a larger band gap than Rb_2Cd_2(SO_4)_3 (RbCdS) and the energy bands for RbCdS are more dispersive than those of TlCdS. From their partial densities of states (PDOS), we have observed that the hybridization between S ionic 2p and O atomic 2p orbitals forms SO4 ionic groups. The remarkable difference between RbCdS and TlCdS is, however, the degree of hybridization between cation (Tl and Rb) and its surrounding oxygen atoms. In the view of quantum chemistry, the strong p-d hybridization indicates the existence of their cation ionic bonds (Cd-O, Rb-O, and Tl-O). The calculations of TlCdS and RbCdS show their optical properties to be less anisotropic. Their anisotropies in the optical properties mainly occur in a low photon energy region of 5-16 eV.
Cluster-assisted generation of multicharged ions in nanosecond laser ionization of carbon bisulfide clusters at 1064 nm

The photoionization of seeded carbon bisulfide molecular beam by a 1064nm nanosecond Nd-YAG laser with intensities varying from 0.8 × 10~(11) to 5.6 × 10~(11) W/cm~2 have been studied by time-of-flight mass spectrometry. Multiply charged ions of S~(q+) (q = 2-6) and C~(q+) (q = 2-4) with kinetic energy of hundreds of electron volts have been observed, and there are strong experimental evidences indicating that those multicharged ions originate from the ionization of CS_2 neat clusters in the beam. An electron recolliding ionization model is proposed to explain the appearance of those multiply charged atomic ions under such low laser intensities.
Template Synthesis and Magnetic Behavior of FeNi Alloy Nanotube Arrays

FeNi nanotubes were successfully prepared in pores of anodic aluminium oxide templates by the wetting template method. By varying the deposition conditions and the parameters of the templates, the lengths and the outer as well as the inner diameters of the tubes can be tailored. The FeNi nanotubes and their arrays were characterized by transmission and scanning electron microscopy. Macroscopic magnetic measurements show the FeNi nanotube arrays to have obvious anisotropy, and the easy axis is parallel to the nanotube axis. The magnetic moment distributions in the tube walls and the magnetization reversal mechanism are discussed. Magnetic moments of the FeNi nanotube preferentially lie in the nanotube wall, but the distribution is spatially isotropic. These magnetic behaviours are due to the unique shape of the nanotube.
Preparation and Absorption Properties in Near Infrared Wavelength of Carbon Nanotubes/Acrylate Coatings

Carbon nanotubes can be used as absorbent materials at the near infared range. In this study, carbon nanotube was treated with surfactant to prevent aggregation, and the acrylate coating of the carbon nanotube was prepared with the carbon nanotube solution and the near infrared reflection properties of the coating were studied. A series of factors influencing the reflectivity of carbon nanotubes/acrylate coatings at 930 nm, such as PVC concentration, the kinds and concentration of the surfactant and size range of the carbon nanotube, were studied. Based on these, the coating procedure was optimized and the carbon nanotubes/acrylate coating was prepared with good absorption properties. The reflectivity is under 0.1% of the coatings and its transmission is below 1.0% at near infrared wavelength of 840–980 nm.