mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Screening and characterization of a novel ruminal cellulase gene (Umcel-1) from a metagenomic library of gayal (Bos frontalis)

Gayal is a rare semi-wild bovine species found in the Indo-China. They can graze grasses, including bamboo leaves, as well as reeds and other plant species, and grow to higher mature live weights than Yunnan Yellow cattle maintained in similar harsh environments. The aim of this study was to identify specific cellulase in the gayal rumen. A metagenomic fosmid library was constructed using genomic DNA isolated from the ruminal contents of four adult gayals. This library contained 38400 clones with an average insert size of 35.5 kb. The Umcel-1 gene was isolated from this library. Investigation of the cellulase activity of 24 random clones led to the identification of the Umcel-1 gene, which exhibited the most potent cellulase activity. Sequencing the Umcel-1 gene revealed that it contained an open reading frame of 942 base pairs that encoded a product of 313 amino acids. The putative gene Umcel-1 product belonged to the glycosyl hydrolase family 5 and showed the highest homology to the cellulase (GenBank accession no. YP_004310852.1) from Clostridium lentocellum DSM 5427, with 44% identity and 62% similarity. The Umcel-1 gene was heterologously expressed in Escherichia coli BL21, and recombinant Umcel-1 was purified. The activity of purified recombinant Umcel-1 was assessed, and the results revealed that it hydrolyzed carboxymethyl cellulose with optimal activity at pH 5.5 and 45°C. To our knowledge, this study provides the first evidence for a cellulase produced by bacteria in gayal rumen.
Western blot detection of PMI protein in transgenic rice

Phosphomannose isomerase (PMI) encoding gene manA is a desirable selective marker in transgenic research. Understanding of its expression patterns in transgenic plant and establishing highly sensitive detection method based on immunoassay have great impacts on the application of PMI. In this study, PMI-specific monoclonal antibodies were generated using recombinant protein as immunogen, and could be used in Western blot to detect as little as 0.5 ng His-tagged PMI protein or rice expressed PMI protein in sample accounted for 0.4% of single rice grain (about 0.08 mg). PMI protein driven by CaMV-35S promoter was detected in dozens of tested tissues, including root, stem, leaf, panicle, and seed at all developmental stages during rice growing, and PMI protein accounted for about 0.036% of total protein in the leaves at seedling stage. The established method potentially can be used to monitor PMI protein in rice grains.
Mapping of three QTLs for seed setting and analysis on the candidate gene for qSS-1 in rice (Oryza sativa L.)

The lower seed setting is one of the major hindrances which face grain yield in rice. One of the main reasons to cause low spikelet fertility (seed setting) is male sterility or pollen abortion. Notably, pollen abortion has been frequently observed in advanced progenies of rice. In the present study, 149 BC_2F_6 individuals with significant segregation in spikelet fertility were generated from the cross between N040212 (indica) and Nipponbare (japonica) and used for primary gene mapping. Three QTLs, qSS-1, qSS-7 and qSS-9 at chromosomes 1, 7 and 9, respectively, were found to be associated with seed setting. The recombinant analysis and the physical mapping information from publicly available resources exhibited that the qSS-1, qSS-7 and qSS-9 loci were mapped to an interval of 188, 701 and 3 741 kb, respectively. The seed setting responsible for QTL qSS-1 was further fine mapped to 93.5 kb by using BC2F7 population of 1 849 individuals. There are 16 possible putative genes in this 93.5 kb region. Pollen vitality tests and artificial pollination indicated that the male gamete has abnormal pollen while the female gamete was normal. These data showed that low seed setting rate relative to qSS-1 may be caused by abnormal pollen grains. These results will be useful for cloning, functional analysis of the target gene governing spikelet fertility (seed setting) and understanding the genetic bases of pollen sterility.
A novel constitutive promoter and its downstream 5′ UTR derived from cotton (Gossypium spp.) drive high-level gene expression in stem and leaf tissues

The development of genetically modified crops requires new promoters and regulatory regions to achieve high gene expression and/or tissue-specific expression patterns in plants. To obtain promoter sequences of plants with new properties, we analyzed the expression traits of the cotton (Gossypium hirsutum) translation elongation factor 1A gene family. The results showed that the GhEF1A8 gene is highly expressed in different organs of cotton plants, and showed much higher transcript levels in stems and leaves. Its promoter (GhEF1A1.7) and the 5′ untranslated region (5′ UTR), comprising a regulatory region named PGhEF1A8, were isolated from cotton and studied in stably transformed tobacco plants. The regulatory region sequences were fused to the β-glucuronidase (GUS) reporter gene to characterize its expression pattern in tobacco. Histochemical and fluorometric GUS activity assays demonstrated that PGhEF1A8 could direct GUS gene expression in all tissues and organs in transgenic tobacco, including leaves, stems, flowers, and roots. The level of GUS activity in the leaves and stems was s ignificantly higher than in cauliflower mosaic virus (CaMV) 35S promoter::GUS plants, but as same as CaMV 35S promoter::GUS plants in flower and root tissues. GUS expression levels decreased 2–10-fold when the 5′ UTR was absent from PGhEF1A8. Deletion analysis of the PGhEF1A8 sequence showed that the region -647 to -323 might possess negative elements that repress transgene expression in tobacco plants. The results suggested that the GhEF1A8 regulation region may represent a practical choice to direct high-level constitutive expression of transgenes and could be a valuable new tool in plant genetic engineering.
食管癌合并糖尿病老年术后患者早期肠内营养与血糖监测的护理

目的探讨老年食管癌合并糖尿病术后早期肠内营养与血糖监测的护理。方法回顾性分析2012年1月至2015年1月上海市第六人民医院金山分院老年食管癌合并糖尿病术后接受肠内营养和血糖监测的37例患者的临床资料,总结其护理方法。结果37例患者术前经胰岛素治疗,血糖均得到有效控制,在全身麻醉下行食管癌根治术,其中经鼻十二指肠管肠内营养者11例、经空肠营养管肠内营养者26例。37例患者均康复出院。结论加强老年患者术后早期肠内营养与血糖监测的护理,有利于改善患者术后营养状况和有效控制围术期的血糖水平,能为患者早日康复提供有力保障。
扩散加权成像在肝细胞癌中的应用

扩散加权成像(DWI)是采用MRI无创检测活体组织功能状态的一种技术[1],目前已成熟应用于中枢神经系统影像诊断、鉴别诊断和定量评估中。在平面回波成像快速序列的应用下,DWI越来越多地应用于腹部影像检查中,尤其是在肝脏影像方面[2]。肝细胞癌(hepatocellular carcinoma,HCC)是最常见、最主要的肝脏恶性肿瘤,发病率和死亡率均很高[3]。本文就DWI在HCC中的临床应用和进展进行综述。
生前烧死出现支气管上皮极化现象1例

本例依据支气管上皮极化现象鉴定为生前烧死,按照生前烧死线索展开进一步的侦查工作,获得了死者生前曾有过多次绝食、体质衰弱、自闭厌世等行为,调取死者生前生活轨迹监控视频,该男生前曾购买塑料桶,并有购买汽油的证据资料,最后本例定性为死者系自焚死亡。
星点设计-效应面法优化雄黄乳膏剂的处方组成

目的优化雄黄乳膏剂的处方组成,并对优化结果进行验证。方法将凡士林的质量、乳化剂的用量、亲水亲油平衡(HLB)值和透皮吸收促进剂月桂氮卓酮(A-zone)的质量作为考察因素,以雄黄对小鼠离体皮肤12 h累计体外透皮吸收量为优化指标,采用星点设计-效应面法对结果进行分析,并建立二次多元回归模型,用于预测处方中各组分的最优配比。结果最佳处方为凡士林质量7.01 g、乳化剂用量6.03 g、HLB值10.05、透皮吸收促进剂Azone质量4.5 g。该处方下,制备的雄黄乳膏剂12 h体外累计透皮吸收量为(16.01 ±3.63) μg。结论该方法可准确地优化雄黄乳膏剂的处方组成,并且建立的二次多元回归模型有较好的预测能力。
案例教学、合作学习法在大专临床康复学课程中的应用

临床康复学是康复医学的核心专业课程,是康复评定与康复治疗技术的集中体现,也就是集过去所学的各种知识和技能应用于患者,具有很强的实践性和应用性。该课程融合了大量前期专业课程的内容,信息量较大,课时任务重,抽象的概念和临床知识易使学生感到枯燥无味[1],授课难度较大。纵观现有的针对本课程教学方法的研究,主要围绕案例教学、体验式教学及情景式教学等教学方法上。由于康复医学的特点是提供全面性、综合性的康复服务,其工作方式是多学科、多专业人员共同合作,组成康复团队——康复治疗组,而以上教学方法无法体现其团队合作的特点。为了提高临床康复学课程的教学效果和学生的综合能力,我们将案例教学与合作学习两种教学方式结合起来,运用于本课程的教学过程中,现将结果报告如下。
中国石油“十二·五”物探技术重大进展及“十三·五”展望

“十二·五”期间,中国石油持续加强物探技术攻关和应用研究,核心装备与软件、适用配套技术呈跨越式发展,5项技术成为中国石油工程技术利器,5项技术入选中国石油十大科技进展,使中国石油物探技术水平整体跨入国际先进行列,形成了业务链完整的物探技术产学研和应用能力,为复杂前陆构造、非均质碳酸盐岩、复杂岩性、火山岩等领域勘探及老油区深化挖潜提供了技术支撑,为柴西南英雄岭、川中龙王庙、新疆环玛湖、塔北等一批优质规模储量的落实奠定了基础,为“储量增长高峰期工程”和中国石油国际化战略做出了突出贡献。“十三·五”期间,国际油气行业发展环境急剧变化,在低油价背景下和勘探转型期,物探业务面临结构调整、优化发展的机遇与挑战,为了支撑中国石油稳健发展和“十三·五”业务发展,物探技术发展将从创新驱动向创新驱动与价值驱动并重转移,“十三·五”期间将持续开展装备、软件和新技术新方法攻关,集成配套经济适用技术,为保障中国石油效益勘探、寻找优质规模储量提供技术支撑。本文阐述了“十二·五”期间的物探科技重大成果,分析了“十三·五”面临的挑战,展望了“十三·五”物探科技发展方向。
降低弹性波全波形反演强烈非线性的分步反演策略

弹性波全波形反演是一种高精度估计地下弹性参数的有效工具,然而其面临的非线性问题比声波更加突出。本文提出一种降低非线性程度的分步反演策略,用于纵、横波速度的高精度重建。首先利用基于包络的弹性波波形反演方法重建纵横波速度的背景模型;然后应用基于时间域正演的频率域弹性波全波形反演方法,利用多尺度策略进一步降低弹性波全波形反演的非线性程度,恢复模型的中、高波数成分。数值实验结果表明,当地震数据中缺少低频和大炮检距成分时,这种分步反演策略对于重建高精度纵、横波速度模型非常有效,对于提高横波速度的反演精度效果尤其明显。
碳酸盐岩孔洞储层地震物理模型研究

根据塔里木H工区碳酸盐岩孔洞储层的地质地震综合解释成果,通过改进地震物理模型制作工艺,构建了一个与该区实际地层参数相近的三维碳酸盐岩孔洞储层精细物理模型。严格按照实际地震资料的采集参数和处理流程对物理模型进行了地震数据采集和处理,获得了与实际地震数据相匹配的物理模型地震数据体。最后,对孔洞储层的纵向分辨率、横向分辨率以及孔洞储层体积校正等问题进行了讨论:认为阻抗反演可有效提高孔洞储集体纵向识别能力;从物理模型研究的角度得到横向识别多洞的最小距离;利用物理模型数据建立了孔洞储集体校正量板,有助于实际孔洞储集体体积的估算。
地震道集优化方法及应用

文中提出了一种与剩余时差无关的绝对值互相关道集拉平方法。将地震道与参考道进行绝对值互相关,得到初步时移量,利用相关系数、时移量的门槛值进行控制和优化,得到最终时移量,进而拉平道集,能适应道集不平的各种异常情况;采用谱均衡技术消除波形畸变,引入简化的子波压缩因子,计算不同角度子波振幅谱,并与参考道子波振幅谱进行对比,得到拉伸因子,可以解决动校拉伸引起的远道频率降低问题。在多个地区的应用结果表明,该方法能较好地校平叠前地震道集和去除远道波形畸变,改善道集的品质。
Comments on three comparative analyses of stem taper models published in Journal of Mountain Science in 2014-2016

Recently the Journal of Mountain Science published three papers (Lumbres et al. 2014; Jung et al. 2015; Lumbres et al. 2016) that compared selected taper models for bias and precision when estimating upper stem diameters for various tree species. The purpose of this commentary is to point out the consequences of the choice of the variable to be predicted when fitting taper equations and the importance of consistency in the definition of the dependent variable when making comparisons among alternative models.
The characteristics of rill development and their effects on runoff and sediment yield under different slope gradients

Rill formation is the predominant erosion process in slope land in the Loess Plateau, China. This study was conducted to investigate rill erosion characteristics and their effects on runoff and sediment yielding processes under different slope gradients at a rate of 10°, 15°, 20° and 25° with rainfall intensity of 1.5 mm min-1 in a laboratory setting. Results revealed that mean rill depth and rill density has a positive interrelation to the slope gradient. To the contrary, width-depth ratio and distance of the longest rill to the top of the slope negatively related to slope gradient. All these suggested that increasing slope steepness could enhance rill headward erosion, vertical erosion and the fragmentation of the slope surface. Furthermore, total erosion tended to approach a stable maximum value with increasing slope, which implied that there is probably a threshold slope gradient where soil erosion begins to weaken. At the same time, the correlation analysis showed that there was a close connection between slope gradient and the various indices of soil erosion: the correlation coefficients of slope gradient with maximal rill depth, number of rills and the distance of the longest rill from the top of the slope were 0.98, 0.97 and -0.98, respectively, indicating that slope gradient is the major factor of affecting the development of rills. Furthermore, runoff was not sensitive to slope gradient and rill formation in this study. Sediment concentration, however, is positively related to slope gradient and rill formation, the sediment concentrations increased rapidly after rill initiation, especially. These results may be essential for soil loss prediction.
Risk assessment of maize drought disaster in southwest China using the Environmental Policy Integrated Climate model

The East Asian monsoon has a tremendous impact on agricultural production in China. An assessment of the risk of drought disaster in maize-producing regions is therefore important in ensuring a reduction in such disasters and an increase in food security. A risk assessment model, EPIC (Environmental Policy Integrated Climate) model, for maize drought disasters based on the Erosion Productivity Impact Calculator crop model is proposed for areas with the topographic characteristics of the mountainous karst region in southwest China. This region has one of the highest levels of environmental degradation in China. The results showed that the hazard risk level for the maize zone of southwest China is generally high. Most hazard index values were between 0.4 and 0.5, accounting for 47.32% of total study area. However, the risk level for drought loss was low. Most of the loss rate was <0.1, accounting for 96.24% of the total study area. The three high-risk areas were mainly distributed in the parallel ridge-valley areas in the east of Sichuan Province, the West Mountain area of Guizhou Province, and the south of Yunnan Province. These results provide a scientific basis and support for the reduction of agricultural drought disasters and an increase in food security in the southwest China maize zone.
伴有性腺功能减退的性功能障碍患者的疗效分析

ED是指阴茎持续不能达到或维持足够的勃起以完成满意的性交,是成年男性最常见的性功能障碍疾病之一,而且其发病率呈现逐年增加的趋势。ED的病因非常复杂,涉及生理性及心理性等多方面因素,因此治疗方面多采用以药物治疗为主,以心理行为治疗为辅的综合疗法,而其中针对原发疾病的药物治疗一直占据着非常重要的位置。在临床工作中,性腺功能减退是ED的常见病因之一,其患者年龄分布范围广,既有中老年男性,亦有年轻男性特发性性腺功能减退者。本研究应用十一酸睾酮胶囊与复方玄驹胶囊分别单独及联合应用治疗伴有性腺功能减退的ED患者,取得了良好的临床效果,现报告如下。
AQP1基因沉默对前列腺癌PC-3细胞的影响

目的探讨水通道蛋白1(AQP1)基因沉默对在前列腺癌PC-3细胞的作用。方法培养PC-3细胞至对数生长期,随机分为质粒转染组和质粒空白组。针对AQP1基因设计合成小片段RNA,并构建高效表达载体。利用转染试剂Lipofectamine~(TM)2000用脂质体介导的基因转染技术将质粒转染入PC-3细胞。RT-PCR检测PC-3细胞AQP1 mRNA的表达情况及激光共聚焦观察室观察、拍照AQP1表达的情况,转染后72 h。将鼠龄为6 w的60只BALB/c(nu-/nu-)雄裸鼠随机分成两组,其中对照组30只,转染组30只。转染组把转染后的前列腺癌PC-3细胞注射裸鼠腋窝处皮下(对照组把未经转染的前列腺癌PC-3细胞注射到裸鼠腋窝处皮下)。每日观察肿瘤生长及体重情况,裸鼠饲养6 w处死,完整取出移植瘤瘤体测量体积和重量。结果与质粒空白组相比,转染组应用RNA干扰技术后AQP-1在前列腺癌PC-3细胞系中mRNA的水平降低,与对照组相比,转染组裸鼠移植瘤体积为(573.39±175.24)mm~3明显小于对照组(1 482.50±327.86)mm~3(P=0.03)。转染组肿瘤重量为(0.55±0.11)g明显小于对照组[(1.31±0.29)g,P= 0.027]。结论AQP-1广泛的表达在正常前列腺组织和前列腺癌组织中,对内环境稳态起着重要的作用。更多的AQP-1促进了前列腺癌细胞的增长,抑制AQP-1的表达可以使前列腺癌移植瘤生长减慢,体积减小。
Fatigue Assessment Method for Composite Wind Turbine Blade

Fatigue strength assessment of a horizontal axis wind turbine (HAWT) composite blade is considered. Fatigue load cases are identified, and loads are calculated by the GH Bladed software which is specified at the IEC61400 international specification and GL (Germanisher Lloyd) regulations for the wind energy conversion system. Stress analysis is performed with a 3-D finite element method (FEM). Considering Saint-Venant's principle,a uniform cross section FEM model is built at each critical zone. Stress transformation matrixes (STM) are set up by applied six unit load components on the FEM model separately. STM can be used to convert the external load into stresses in the linear elastic range. The main material of composite wind turbine blade is fiber reinforced plastics (FRP).In order to evaluate the degree of fatigue damage of FRP, the stresses of fiber direction are extracted and the well-known strength criterion-Puck theory is used. The total fatigue  damage of each laminate on the critical point is counted by the rain-flow counting method and Miner's damage law based on general S-N curves. Several sections of a 45.3 m blade of a 2 MW wind turbine are studied using the fatigue evaluation method. The performance of this method is compared with far more costly business software FOCUS. The results show that the fatigue damage of multi-axis FRP can be assessed conveniently by the FEM-STM method. And the proposed method gives a reliable and efficient method to analyze the fatigue damage of slender composite structure with variable cross-sections.
Wake Numerical Simulation of Wind Field Based on Two  Modified Wind Engineering Models

With the assumption of the Park model that the wake region is in  linear expansion and the cross-wind is in multinomial and Gaussian distribution in wake region, one develops the Park-polynomial model and the Park-Gaussian model to numerically simulate the wake flow field for a single wind turbine. Compared with the measured data of wind farm and the wind tunnel test, it shows that the prediction precision of wake field has been improved obviously under the modified initial wake radius. Moreover, both of the newly modified two models could well simulate the wind velocity in wake region, because the predicted results is approximately consistent with the test result, and the cross-wind distribution conforms to that of the real flow field. The two models have still inherited many advantages of engineering models, such as simple form, easy-to-code, and high computational efficiency. Particularly, the Park-Gaussian model is the best in overall performance among them.
Coupled Aerodynamic and Hydrodynamic Analysis of Floating Offshore  Wind Turbine Using CFD Method

To simulate floating offshore wind turbine (FOWT) in coupled wind-wave domain via CFD method, the NREL 5 MW wind turbine supported by the OC3-Hywind Spar platform is modeled in the STAR-CCM+ software. Based on the Reynolds-averaged Navier-Stokes (RANS) equations and re-normalisation group (RNG) k-ε turbulence model, the rotor aerodynamic simulation for wind turbine is conducted. Numerical results agree well with the NREL data. Taking advantage with the volume of fluid (VOF) method and dynamic fluid body interaction (DFBI) technology, the dynamic responses of the floating system with mooring lines are simulated under the coupled wind-wave sea condition. The free-decay tests for rigid-body degrees of freedom (DOFs) in still water and hydrodynamic tests in a regular wave are performed to validate the numerical model by comparing its result with the results simulated by FAST. Finally, the simulations of the overall FOWT system in the coupled wind-wave flow field are carried out. The relationship between the power output and dynamic motion responses of the platform is investigated. The numerical results show that the dynamic response of wind turbine performance and platform motions all vary in the same frequency as the  inlet wave. During platform motion, the power output of wind turbine is more sensitive than the thrust force. This study may provide some reference for further research in the coupled aero-hydro simulation of FOWT.
乳腺硬化性腺病的超声诊断价值

超声检查在乳腺疾病的诊断和鉴别诊断中已得到广泛的应用,特别对乳腺肿块良恶性的鉴别有很高的价值,为临床诊断和治疗提供了重要的信息。乳腺腺病是一种常见的乳腺良性增生性疾病,而乳腺硬化性腺病(sclerosing adenosis,SA)是其中较为少见的一种类型,部分病例在病理学和声像图上与乳腺恶性病变有相似之处。因此,正确认识乳腺SA的声像图表现,有助于减少误诊,避免过度外科手术治疗。本研究回顾分析经外科手术治疗,并经病理证实的乳腺SA的术前超声检查资料,旨在探讨乳腺SA的声像图特征。
白内障超声乳化术致大面积角膜后弹力层脱离二例

大面积角膜后弹力层脱离是白内障手术严重的并发症之一,其治疗难度很大,角膜内皮细胞失代偿风险大,所以预防其发生也就显得尤为重要。我们认为应注意:(1)尽可能使用新的刀具;(2)手术切口尽可能避开角膜老年环;(3)术中密切观察,一旦发现有小范围角膜后弹力层脱离,应立即暂停手术,小心处置,勿使脱离范围增大;(4)术前仔细评估角膜质量,特别要注意有沙眼、角膜斑(云)翳等情况,有些患者虽然角膜内皮细胞计数及形态正常,但按压角膜时裂隙灯显微镜下可见后弹力层似有波浪状反光,提示基质层与后弹力层间存在间隙或潜在间隙。
激光祛除睑缘文刺术后角膜擦伤——附2例报告

激光祛除睑缘文刺存在着皮肤肿胀、淤血、过敏、感染、角膜损伤和睫毛毛囊损伤等不良反应。其中,激光术后角膜擦伤的发生率很低,但应及时发现和治疗,以免继续加重。为此,笔者回顾分析了2013 -2015年,采用激光祛除睑缘文刺患者132例的临床资料,其中2例发生角膜擦伤,现报告如下。
臂远端外侧穿支逆行岛状皮瓣修复肘部中小面积软组织缺损

临床上可供修复肘部皮肤缺损的皮瓣种类较多,邻位带蒂皮瓣因优点较多而作为首选。传统的臂外侧逆行岛状皮瓣是利用桡侧副动脉为蒂,术中需要游离桡侧副动脉,“无效”折叠的筋膜蒂部太长。穿支皮瓣其轴心血管为穿支,切取方便。笔者于2010年3月-2013年8月利用臂远端外侧穿支逆行岛状皮瓣修复肘部中小面积软组织缺损,获得满意效果。现报告如下。
乌克兰事件的启示:防范针对电网的虚假数据注入攻击

电力系统由物理系统与信息系统共同构成。这样,电力系统的安全问题自然就包括物理安全和信息安全两个层面。长期以来,电力系统物理安全强调系统在遇到扰动时能维持正常运行,而信息安全则针对保护与通信网络及计算机系统。信息物理融合是电力系统的长期发展趋势,目的是通过信息化提高电力系统的安全性、可靠性和运行效率。随着电力系统信息化程度的快速提高,电力系统内物理层与信息层的交互作用不断深化,两者的界限越来越模糊。在物理系统与信息系统深度融合后,信息系统故障与网络攻击不仅会破坏信息系统的功能,还可能进一步传导至物理系统,威胁物理系统的安全运行。这类新的安全问题被称为电力系统信息物理安全(cyber physical security)问题。近年来,随着针对工业系统特别是电力系统的网络攻击事件越来越多,信息物理安全问题已经引发电力公司和学术界的高度关注。
乌克兰停电事件引起的网络攻击与电网信息安全防范思考

近两年来,中国提出了能源互联网的发展战略,已开展了许多相关基础性研究。能源互联网可认为是由传统电力系统(一次系统与二次系统)、分布式能源、通信网络等混合组成的具有互动性的电网物理信息系统,其中信息安全是保证能源互联网健康发展的重要基石。
Synthesis and Crystal Structure of a Novel Bis(chlorido)-bridged One-dimensional Chain-like Copper(II) Polymer

A copper(II) complex [LCu_2Cl_4]_n was synthesized by a new bis-Schiff base ligand containing quinoline unit, 1,4-bis[2-(4-fluorophenyl)iminomethyl-8-quinolinoxy]butane (L). X-ray crystal structure shows that it is a binuclear complex, and the crystal belongs to the triclinic system, space group Pi, with a = 9.387(2),b = 9.968(2), c = 10.291(2) A,α = 87.532(3),β = 63.762(2),y = 86.628(3)°,V= 862.1(3) A~3,Z= 1, D_c= 1.640 Mg/m~3,F(000) = 428,R = 0.0416 and wR = 0.1141. Each Cu(Il) metal ion coordinates with a quinoline N atom, an imine N atom, an ether oxygen atom and three chlorides, forming a distorted six-coordinated octahedronal structure. Each copper(II) complexation unit links with one of the adjacent ligand copper complexation units through the chlorido bridging groups, thus generating an infinite one-dimensional chain structure. Such ID chains further construct a 2D network structure by π-π stacking interactions.
Syntheses, Structures, Fluorescence and Heterogeneous Catalysis of Coordination Polymers with 4-Benzoimidazol-1-yl-methyl Benzoic Acid and 2,2'-Dipyridine

Two coordination polymers called [Ni(L)_2]_n (1) and [Ni(2,2'-bpy)_22(H_2O)]_n (2) (HL = 4-benzoimidazol-1-yl-methyl benzoic acid, 2,2'-bpy = 2,2'-dipyridine) were synthesized by solvothermal reaction simultaneously and characterized by elemental analyses, thermogravimetric analysis, X-ray powder diffraction, IR spectroscopy and single-crystal X-ray diffraction analysis. Complex 1 crystallizes in monoclinic system, space group P2_1/c with a = 14.673(3), b = 10.773(2), c =16.566(3) A, V= 2559.2(8)A~3,Z = 4 and F(000) = 1160.2 also crystallizes in monoclinic system,space group C2/c with a = 15.404(3),b = 12.652(3), c = 6.5362(13) A, V= 1246.2(5) A~3, Z = 4 and F(000) = 712. The bridging L ligand connects the Ni~(II) cations into a 2D network in complex 1,while 2 shows a 1D structure formed through the two O atoms of SO_4~(2-) ions connecting the molecule. The catalytic properties indicate that complex 1 shows good catalytic activities for the cyanosilylation of 4-chlorobenzaldehyde. In addition, fluorescence property of complex 1 which quenches the excitation intensity in solid state was investigated at room temperature.
I期低危型子宫内膜癌是否需要切除淋巴结?

子宫内膜癌是常见的女性生殖系统恶性肿瘤,在美国及我国的北京、上海等地区,其发病率已经位于妇科恶性肿瘤首位。由于大多数子宫内膜癌患者早期即出现阴道异常流血等典型症状,在临床早期得以诊断,国际妇产科联盟(FIGO)2009年手术病理分期为I期患者的比例很高,国内外数据显示,占73.1%~73.7%。对于I期子宫内膜癌的治疗方法,美国国立综合癌症网络(NCCN)指南建议行子宫全切除和双侧附件切除+盆腔淋巴结切除术,若存在高危因素者,加行腹主动脉旁淋巴结切除。但是,I期低危型子宫内膜癌患者是否需要切除淋巴结存在较大争议,不同国家、不同临床中心、不同医师在治疗上存在较大差异。本文就I期低危型子宫内膜癌是否需要切除淋巴结进行阐述。
基于MP-NBFE法的磁控电弧焊缝跟踪的信号提取

针对磁控电弧焊缝跟踪信号非线性不平稳等特点,提出了一种基于匹配追踪和非参数基函数相结合的磁控电弧焊缝跟踪特征信号提取方法(MP_NBFE);在匹配追踪的每一次迭代中,首先自适应调整模板信号,使其逼近原始跟踪信号中的某一特征成分,然后用非参数基函数特征波形提取方法计算出与该模板信号最匹配的信号特征成分的最优估计;其次,依照匹配追踪的原理,用最优估计值去更新信号余量,在新的信号余量中继续寻找计算其他特征成分的最好估计.重复执行该过程,直到信号余量的能量小于预先设定的阈值.通过自行研制的磁控电弧传感器焊缝跟踪平台上的特征信号提取试验验证,结果表明,该方法提取的V形坡口扫描信号与V形坡口扫描的仿真信号变化趋势相同,可准确反映焊缝偏差信息.
中国低活化马氏体钢TIG焊焊接接头的高温蠕变性能分析

文中在钨极氩弧焊条件下,在温度823 K和180 ~260 MPa应力水平下对CLAM钢焊接接头的蠕变性能进行了研究,作出蠕变曲线,建立数学模型分析预测蠕变变形机制.结果表明,CLAM钢TIG焊焊接接头表现出典型的三阶段蠕变过程;在温度一定的情况下随着应力水平的提高,稳态蠕变速率增加,断裂时间变短.通过蠕变方程得到的稳态阶段焊接接头的应力因子n大于合金典型值3 ~7,其激活能Q约为436 kJ/(mol·K),并且大于铁的自扩散激活能(300 kJ/(mol·K)),显示为位错主要控制蠕变变形.
热一物理与力学参量对混合钢U肋加劲板残余应力分布影响

建立三维热弹塑性有限元模型,使用随温度变化的材料热-物理与热-力学参量,对混合钢U肋加劲板的焊接温度场和应力场进行了模拟.应用经试验验证的焊接残余应力数值模拟方法,研究了热导率、比热容、密度、弹性模量、泊松比、线膨胀系数共6个热-物理与力学参量对混合钢U肋加劲板焊接残余应力的影响.结果表明,热导率和泊松比对混合钢U肋加劲板焊接残余应力分布影响很小;弹性模量和热膨胀系数对母板残余拉应力和残余压应力以及U肋腹板残余压应力大小影响最大,次之为比热容、密度.因此,对于残余压应力比较敏感的受压混合钢U肋加劲板,在焊接残余应力数值模拟中弹性模量和热膨胀系数的取值正确与否将对计算结果产生较大影响.
The effect of nitrogen annealing on lithium ion intercalation in nickel-doped lithium trivanadate

The communication reports an exploratory experimental study on the effects of nitrogen annealing on lithium ion intercalation in nickel-doped lithium trivanadate cathodic electrodes for lithium ion batteries. It shows good rate performance with discharge capacities of 348.6, 252.6, 191.9 and 96.7 mAh g~(-1) at 0.2, 0.5, 1 and 5 C, respectively. Nitrogen annealing resulted in the formation of parasitic secondary-phase LiV_2O_5 and appreciably increased tetravalent vanadium ions compensated with oxygen vacancies, which would enhance the electronic conductivity and lithium ion diffusivity and promote the interface interaction and deintercalation process, and thus lead to the enhanced lithium ion intercalation properties. The possible impacts of the parasitic secondary-phase LiV_2O_5 on the lithium ion intercalation performance have also been discussed.