mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Responses of zonal wind at ~40°N to stratospheric sudden warming events in the stratosphere, mesosphere and lower thermosphere

Based on the data at ~40°N at different longitudes during different stratospheric sudden warming (SSW) events, the responses of zonal winds in the stratosphere, mesosphere and lower thermosphere to SSWs are studied in this paper. The variations of zonal wind over Langfang, China (39.4°N, 116.7°E) by MF radar and the modern era retrospective-analysis for research and applications (MERRA) wind data during 2010 and 2013 SSW and over Fort Collins, USA (41°N, 105°W) by lidar and MERRA wind data during 2009 SSW are compared. Results show that the zonal wind at ~40°N indeed respond to the SSWs while different specifics are found in different SSW events or at different locations. The zonal wind has significant anomalies during the SSWs. Over Langfang, before the onset of 2010 and 2013 SSW, the zonal wind reverses from eastward to westward below about 60–70 km and accelerates above this region, while westward wind prevails from 30 to 100 km after the onset of 2010 SSW, and westward wind prevails in 30–60 and 85–100 km and eastward wind prevails in 60–85 km after the onset of 2013 SSW. Over Fort Collins during 2009 SSW, eastward wind reverses to westward in 20–30 km before the onset while westward wind prevails in 20–30 and 60–97 km and eastward wind prevails in 30–60 and in 97–100 km after the onset. Moreover, simulations by the specified dynamics version of the whole atmosphere community climate model (SD-WACCM) are taken to explain different responding specifics of zonal wind to SSW events. It is found that the modulation of planetary wave (PW) plays the main role. Different phases of PWs would lead to the different zonal wind along with longitudes and the different amplitudes and phases in different SSW events can lead to the different zonal wind responses.
High-frequency vibration analysis of thin plate based on wavelet-based FEM using B-spline wavelet on interval

The wavelet finite element methods (WFEMs) own higher calculation accuracy and efficiency for structure analysis. Unfortunately, the existing WFEMs are still limited in low-frequency domain when capturing dynamic characteristics of thin plate. This paper proposes the wavelet multi-elements method based on C1 type B-spline Kirchhoff plate (C1BKP) element to break up this limitation. The validity, numerical stability and convergence respectively are investigated systematically in numerical study. The corresponding results show that the calculation accuracy and numerical stability are very excellent when predicting the high-order natural frequency. The maximum relative errors can be rapidly reduced to 0.4% within the first 1000 modes of thin plate under simply supported. Besides, the method is suitable for predicting the dynamic characteristics of thin plate under various boundary conditions.
Analyses of thermodynamic performance for the endoreversible Otto cycle with the concepts of entropy generation and entransy

In this paper, the endoreversible Otto cycle is analyzed with the entropy generation minimization and the entransy theory. The output power and the heat-work conversion efficiency are taken as the optimization objectives, and the relationships of the output power, the heat-work conversion efficiency, the entropy generation rate, the entropy generation numbers, the entransy loss rate, the entransy loss coefficient, the entransy dissipation rate and the entransy variation rate associated with work are discussed. The applicability of the entropy generation minimization and the entransy theory to the analyses is also analyzed. It is found that smaller entropy generation rate does not always lead to larger output power, while smaller entropy generation numbers do not always lead to larger heat-work conversion efficiency, either. In our calculations, both larger entransy loss rate and larger entransy variation rate associated with work correspond to larger output power, while larger entransy loss coefficient results in larger heat-work conversion efficiency. It is also found that the concept of entransy dissipation is not always suitable for the analyses because it was developed for heat transfer.
Thermal performances of non-equidistant helical-coil phase change accumulator for latent heat storage

Helical-coil is a common structure of heat exchanger unit in phase change heat accumulator and usually has the equal coil pitch between adjacent coils. Its thermal performances could be improved by improving the uniformity of the phase change material (PCM) temperature distribution. Thus, a novel non-equidistant helical-coil structure was proposed in this study. Its coil pitch decreased along the flow direction of heat transfer fluid, which made the heat exchange area in unit volume increase to match the decreasing temperature difference between the heat transfer fluid and PCM. The structure was optimized using numerical simulation. An experimental system was developed and the experiment results indicated that the proposed non-equidistant helical-coil heat accumulator was more effective than equidistant helical-coil for latent heat storage. The uniformity of the temperature distribution was also confirmed by simulation results.
Incubation experiment demonstrates effects of carbon and nitrogen on microbial phosphate-solubilizing function

Phosphorus (P) ultimately comes from rock weathering in natural ecosystems (Porder et al., 2007), and thus solubilization of rock phosphate plays a crucial ecological role in P supply for the ecosystems. Especially, microbial solubilization of rock phosphate is a vital process for the replenishment of available P in alpine ecosystems where the weathering degree of soil is low. The phosphate solubilizing microorganisms (PSM), major participants in the process, are directly affected by carbon (C) and nitrogen (N) sources. Given that the C/N stoichiometry affects the microbial community structure and biomass (Cleveland and Liptzin, 2007; Waring et al., 2013), we speculated that the levels and ratios of C and N regulate the phosphate-solubilizing function of PSM communities in alpine soils. In addition, global changes and anthropogenic activities have led to N deposition and elevated atmospheric CO_2. As a sensitive zone, soil C and N of alpine regions is likely to change, and then affect microbial phosphate-solubilizing function. Therefore, it is necessary to clarify the influences of soil C and N on the phosphate-solubilizing function of microbial communities in alpine soils to improve understanding of the effect of global changes on alpine P cycle.
Exploring the history of cultural exchange in prehistoric Eurasia from the perspectives of crop diffusion and consumption

The history of cultural exchange in prehistoric Eurasia(CEPE)has been widely investigated. Based on archaeological evidence, this process is thought to date back to at least the early Bronze Age, although details about timings and routes remain unclear. It is likely that CEPE promoted the spread and exchange of crops that originated in different parts of Eurasia; since these remains can be definitely identified and directly dated, they provide ideal research materials to explore the history of CEPE. In this paper, we review the available archaeobotanical evidence and direct radiocarbon dates for crop remains, alongside carbon isotopic data from human bones unearthed from prehistoric sites in Eurasia, in order to investigate the history of the spread of millet crops, and wheat and barley, that were first domesticated in the eastern and western parts of Eurasia during prehistoric times. In combination with other archaeological evidences, we discuss the history of CEPE. Our results suggest that wheat and barley were domesticated in western Asia around 10500 a BP, spread into Europe and western Central Asia before 8000 a BP, and reaching eastern Central Asia and northwestern China between 4500 and 4000 a BP. Data show that both broomcorn and foxtail millet were domesticated in eastern Asia before 7700 a BP, spread into eastern Central Asia between 4500 and 4000 a BP, and into western Asia and Europe prior to 3500 a BP. Wheat, barley, and millet crops were first utilized together in eastern Kazakhstan within Central Asia around 4400 a BP, the region where earliest CEPE is likely to have taken place. These crops were mixedly used mainly in eastern central Asia and northwest China between 4500 and 3500 a BP, and then across the Eurasia before 2200 a BP. The results of this study suggest that transcontinental CEPE might have been initiated during the fifth millennium, before intensifying during the Bronze Age to lay the foundations for the creation of the ancient Silk Road during the Han Dynasty(between 202BC and 220AD).
N-cap helix nucleation: methods and their applications

Recapitulation of well-defined α-helices could result in constrained peptide mimetics with preferable secondary structures and enhanced therapeutic properties for various purposes. Among the helix-stabilizing strategies, the nucleation strategies are able to maximize recognition specificity of the original sequence without compromising the molecular recognition surface. In this review, current methodologies of helix nucleation are introduced including their constructing strategies, structure features and proof of concept biological applications.
Electrochemiluminescence of metal-organic complex nanowires based on graphene-Nafion modified electrode for biosensing application

In this work, we chose tris(2,2′-bipyridyl)ruthenium(II)hexafluorophosphate(Ru(bpy)_3(PF6)_2), a metal-organic complex material, to prepare nanowires, which were subsequently applied for the construction of electrochemiluminescence(ECL)biosensor by immobilizing them onto a glassy carbon electrode(GCE)with graphene-Nafion composite films. The graphene therein, being a two-dimensional carbon nanomaterial with outstanding electronic properties, can obviously improve the conductivity of the Nafion film, as well as enhance the electrochemical signal and ECL intensity of the Ru(bpy)3(PF6)2 nanowires(RuNWs)at low graphene concentration. The developed biosensor exhibited excellent ECL stability with tripropylamine(TPrA)as co-reactant. The ECL biosensor exhibited high sensitive ECL response in a wide linear range and low detection limit for the detection of proline. It is considered that the oxidation products of proline would be responsible for the ECL enhancement. The large electro-active area of the nanowires and the enhancement effect of the graphene played critical roles in the high detection performance of the ECL biosensor. The results demonstrated herein may provide a useful enlightenment for the design of more sensitive ECL biosensors.
A novel coumarin-based water-soluble fluorescent probe for endogenously generated SO_2 in living cells

A novel coumarin-based “turn-on” fluorescent probe SS-1 was developed for selective detection of SO_2 derivatives in 100% water solution among reactive sulfur species(RSS). The detection limit of the method was 91.7 nM. Moreover, the probe exhibited low cytotoxicity and was successfully applied in the imaging of endogenously generated SO_2 in HeLa cells.
New procedure to generate multipliers in complex Neumann problem and effective Kohn algorithm

The purpose of this paper is threefold. (i) To explain the effective Kohn algorithm for multipliers in the complex Neumann problem and its difference with the full-real-radical Kohn algorithm, especially in the context of an example of Catlin-D'Angelo concerning the ineffectiveness of the latter. (ii) To extend the techniques of multiplier ideal sheaves for the complex Neumann problem to general systems of partial differential equations. (iii) To present a new procedure of generation of multipliers in the complex Neumann problem as a special case of the multiplier ideal sheaves techniques for general systems of partial differential equations.
冷龙岭断裂系活动性与2016年门源6.4级地震构造研究

2016年1月21日门源MS6.4级地震发生在祁连-海原断裂带冷龙岭断裂北侧. 此次地震邻近冷龙岭断裂发生, 震中距祁连山北缘断裂带民乐-大马营断裂和皇城-双塔断裂较远, 地震破裂面近北西向, 与两条断裂的走向呈一定角度相交. 震源机制解显示此次地震为逆冲型地震, 与冷龙岭断裂逆-走滑运动性质略有差异. 在野外地质填图的基础上, 采用构造地貌分析、探槽开挖和~(14)C定年技术等研究方法, 揭示冷龙岭断裂全新世活动明显, 可能表现为特征滑动行为, 地震震级为M_W7.3~7.5; 断裂倾角较陡, 倾向北北东, 构造样式上表现为花状构造; 最新一次地震事件的形成时间晚于1815~1065a BP. 冷龙岭北侧断裂是冷龙岭断裂西北端一条伴生断裂, 受到冷龙岭断裂左旋剪切在端部持续的构造推挤作用, 相应发生弯曲, 产生向外的构造旋转作用, 偏离优势破裂方位, 活动性相应减弱, 在地表表现为一条晚第四纪变形不明显的逆断裂, 与断裂整体呈北东向微突出的弧形形态和晚第四纪以来没有断错地表的地质地貌迹象相协调, 但此类断裂在深部仍可能发生破裂, 产生中强地震. 断裂几何学特征和运动性质与震源机制解揭示的断层节面2产状和运动性质以及余震和地震烈度的分布特征较为吻合. 冷龙岭北侧断裂作为门源M_S6.4级地震发震构造较为恰当. 冷龙岭北侧断裂此次的逆冲运动也为冷龙岭断裂下一次的运动腾出空间. 在冷龙岭北侧断裂历史演化过程中, 冷龙岭断裂和冷龙岭北侧断裂对局部地形地貌产生构造抬升作用.
准噶尔盆地南缘凝析油、蜡质油与稠油的形成机理

对于发育多套不同成熟度烃源岩、存在多种类型原油及天然气的复杂含油气区, 如何准确判断油气来源与成因一直是非常困难的事情. 准噶尔盆地南缘中部地区存在正常原油、轻质油、凝析油、蜡质油和稠油, 同时也发现了大量天然气, 长期以来对该地区凝析油的来源与成因一直存在很大争议, 而对于蜡质油与稠油的形成则几乎没有研究. 本文以该地区为研究实例, 探讨复杂油气区凝析油、蜡质油与稠油成因判识地质地球化学方法, 揭示该地区多种类型原油并存的原因与地球化学过程. 南缘中部地区40多个原油、轻质油、凝析油和稠油化学组成及其变化特征精细分析对比表明, 该区凝析油以低碳数正构烷烃为主, 含有丰富的环己烷、甲基环己烷等环烷烃和苯、甲苯、二甲苯等低碳数芳烃, 庚烷值在19~21%, 异庚烷值在1.9~2.1, 甲苯/正庚烷比值在1.5~2.0之间, 其烷烃的分布与高密度蜡质原油和稠油呈镜像关系. 结合该区原油、凝析油油源及天然气气源对比结果认为, 该区凝析油是白垩系湖相烃源岩生成的成熟原油油藏, 在后期遭受了侏罗系生成的高成熟天然气气侵改造的产物, 为蒸发分馏/相控运移分馏作用形成的凝析油. 蜡质油是蒸发分馏/相控运移分馏作用过程的中间产物或阶段产物, 稠油是蒸发/相控运移分馏作用的残留物. 蒸发/相控运移分馏作用是南缘凝析油、蜡质油、稠油形成的主要成因机理, 其导致油藏原油及凝析油的正庚烷、甲基环己烷、甲苯等轻烃化合物含量发生很大变化, 使凝析油的甲苯/正庚烷等比值具有很大的不确定性. 因此, 不能依据凝析油中甲苯/正庚烷与正庚烷/甲基环己烷比值简单地套用Thompson图版判识其成因, 而必须从研究区地质条件、烃源岩成烃演化与生烃历史、各种类型油气分子组成与分布特征、不同物理化学性质油气在纵向及区域上分布等方面综合分析判识凝析油的成因.
黔渝地区志留系龙马溪组黑色笔石页岩的阶段性渐进展布模式

龙马溪组黑色页岩在贵州、重庆等地广泛分布, 是志留系生物地层研究和页岩气勘探的重要对象. 本文针对黔渝地区从贵阳、遵义、桐梓、綦江至华蓥山这一由南向北的廊带, 以其中生物地层研究程度较高的典型剖面为基础, 总结出龙马溪组黑色笔石页岩的阶段性渐进展布模式. 在横向上利用笔石带对比框架, 将遵义至华蓥山划分为四个发育不同黑色页岩层段的廊带, 并研究它们随时间展布的规律; 同时, 也较为准确地获得了龙马溪组黑色页岩与其上混合相地层和碳酸盐岩地层之间互相消长的相变过程. 此外, 本文还利用笔石深度分带的通用模式, 论述了黔渝龙马溪组连续沉积的笔石页岩层段随时间其沉积水深不断加深的过程, 从而将其划分为从LM1到LM5的海侵渐进阶段和LM5之后的均衡扩展阶段, 在每一阶段龙马溪组黑色页岩的分布受控于不同的主导因素. 这一阶段性渐进展布模式, 对研究四川盆地南缘龙马溪组黑色页岩的时空分布具有重要的参考意义.
lncRInter: A database of experimentally validated long non-coding RNA interaction

Non-coding regions are the major component of human genomes and the long non-coding RNA (lncRNA) is a class of pervasive genes located in noncoding regions (Morris and Mattick, 2014). lncRNAs play a wide range of regulatory roles in gene transcription, translation, epigenetic modification and protein function by interacting with different types of molecules including DNA, RNA and protein (Mercer and Mattick, 2013; Vance and Ponting, 2014). The diverse interacting partners of lncRNAs pose a challenge to unveil their functional significance. Due to the different interacting molecule types and binding modes, the prediction of lncRNA interaction partner is still very difficult. Fortunately, mounting experimental studies have reported the function and interaction partners of different lncRNAs during recent decade (Batista and Chang, 2013). Thus, collecting and integrating these lncRNA interaction data is a primary step to decipher the code of lncRNA interaction.
超声诊断动脉导管未闭并肺动脉赘生物1例

讨论IE指由于心瓣膜、心内膜或血管内膜微生物感染而出现的、临床表现为全身性败血症的炎症性疾病。心内结构异常、高速血流冲击导致内膜受损是发生IE的病理基础。赘生物是IE的特异性表现,好发于高速血流直接冲击的心内膜或瓣膜。该例患者为动脉导管未闭合并IE,由于未闭的动脉导管内高速分流血流的长期冲击,损伤肺动脉内膜,使胶原暴露,形成主肺动脉内赘生物,临床较为少见。肺栓塞多因存在体内高凝状态、血流淤滞及血管内皮损伤,肺动脉及其分支出现栓子栓塞而引起的临床及病理生理综合征,赘生物脱落导致的动脉栓塞是IE的常见并发症。超声心动图发现赘生物可以确诊IE,并可明确赘生物的大小、附着部位及活动度,对制订治疗方案和预后随访等有重要作用。
Usingvery long-range terrestriallaser scanner to analyze the temporal consistency of the snowpack distribution in a high mountain environment

This study demonstrated the usefulness of very long-range terrestrial laser scanning (TLS) for analysis of the spatial distribution of a snowpack, to distances up to 3000 m, one of the longest measurement range reported to date. Snow depth data were collected using a terrestrial laser scanner during 11 periods of snow accumulation and melting, over three snow seasons on a Pyrenean hillslope characterized by a large elevational gradient, steep slopes, and avalanche occurrence. The maximum and mean absolute snow depth error found was 0.5-0.6 and 0.2-0.3 m respectively, which may result problematic for areas with a shallow snowpack, but it is sufficiently accurate to determine snow distribution patterns in areas characterized by a thick snowpack. The results indicated that in most cases there was temporal consistency in the spatial distribution of the snowpack, even in different years. The spatial patterns were particularly similar amongst the surveys conducted during the period dominated by snow accumulation (generally until end of April), or amongst those conducted during the period dominated by melting processes (generally after mid of April or early May). Simple linear correlation analyses for the 11 survey dates, and the application of Random Forests analysis to two days representative of snow accumulation and melting periods indicated the importance of topography to the snow distribution. The results also highlight that elevation and the Topographic Position index (TPI) were the main variables explaining the snow distribution, especially during periods dominated by melting. The intra- and inter-annual spatial consistency of the snowpack distribution suggests that the geomorphological processes linked to presence/absence of snow cover act in a similar way in the long term, and that these spatial patternscan be easily identifiedthrough several years of adequate monitoring.
腹腔镜手术治疗复杂胆囊的临床分析

复杂胆囊是指萎缩性胆囊炎、胆囊颈部或胆囊管结石嵌顿、胆囊积脓、胆囊胆管内瘘、Calot三角组织致密纤维化粘连、肠管与胆囊或Calot三角致密纤维化粘连、Calot三角大量脂肪堆积并粘连等,一直被认为是腹腔镜胆囊切除术(laparoscopic cholecystectomy,LC)的相对禁忌证。复杂性胆囊疾病因解剖变异或急慢性胆囊炎症致胆囊Calot三角粘连致密,解剖不清,增加了LC的难度,易致胆管损伤和术后出血、胆漏。我院2011年7月~ 2015年7月共施行LC 1100例,其中120例为复杂胆囊,术前检查均未发现特殊,均为术中发现复杂胆囊,均获得良好疗效,本文对其进行回顾性分析,报道如下。
生态瞬时评估法的研究策略及在护理领域的应用现状

生态瞬时评估法(ecological momentary assessment, EMA)是20世纪末新兴的心理学研究方法,由著名心理学家Stone首次提出。该方法强调对个体体验及行为资料的实时收集,早期主要被应用于应对及认知的相关研究中。较之传统结构式量表,EMA已被证实具有更高的生态学效度。目前,EMA也被广泛应用于社会与行为科学、经验现象学及临床医学等诸多方面。国外护理领域的EMA研究主要是与移动医疗技术结合,探讨疾病的症状体验及管理。鉴于EMA在国内刚刚起步,笔者对EMA研究技术及在护理学中的应用进行综述,以期为EMA在国内护理同行的推广及相应本土化测评模式的开发提供参考。
增生性肌炎MRI表现2例

增生性肌炎较罕见,是一种假肉瘤性病变,生长迅速,病因不清,手术切除即可治愈。病变常发生于胸壁、肩胛区、大腿深部、头颈面部,可有疼痛,病变界限不清,常被误诊为恶性肿瘤而给予不必要的根治性手术。本组2例患者均被误诊为恶性肿瘤。增生性肌炎是成纤维细胞的增生性病变,病变细胞穿插于横纹肌纤维之间形成网状结构,在横切面上呈"棋盘样",累及基质组织而不累及横纹肌本身。本组2例MRI的表现均与病理相符。本病需与结节性筋膜炎(nodular fasciitis, NF)、骨化性肌炎等相鉴别。NF表现为"筋膜尾征"和"反靶"征,边界清;骨化性肌炎早期可见水肿、MR增强扫描可见边缘环形强化,中期可见边缘可见蛋壳样钙化,结合外伤史,不难与本病鉴别。
曲线钢顶管同向弯曲管节应力特性试验研究

曲线钢顶管作为一种刚刚兴起的非开挖地下施工技术,由于其管节为两端接头加强的薄壁圆筒结构,与传统混凝土顶管存在显著差别,在管节曲线偏转顶进时应力分布更加复杂。为研究钢管节在曲线顶进过程中应力分布和变化规律,以拱北隧道曲线顶管管幕工程为研究对象,采用室内顶管试验系统对钢管节在不同偏角和轴向顶力作用下进行受力模拟试验。试验结果表明:各监测断面轴向和环向应力在管节偏转内侧和外侧出现应力集中,应力曲线基本关于水平线(90°和270°线)对称分布;后续管节弯曲内侧应力大于外侧,而机头后方的首节管却表现为弯曲外侧应力大于内侧;各测点轴向和环向应力随着轴向顶力和偏角的增大而增大,作用在后续管节上的轴向压应力在向前传递过程发生衰减。
高铁酸盐在线制备及其预氧化强化絮凝除藻的中试研究

从电极组合方式、碱液浓度、极间距、电流强度和电解质浓度等因素,探索了电化学法在线制备高铁酸盐的最佳条件。采用高铁酸盐预氧化,结合常规水处理工艺,研究对厦门某水厂原水中浊度、UV254、氨氮和叶绿素a的去除效果;对比了单独絮凝和高铁酸盐强化絮凝对微污染物的去除。结果表明:在最优电解条件下,电化学在线制备高铁酸盐的最大浓度可达2mmol/L;高铁酸盐作为预氧化剂能够强化絮凝沉淀过程,不但产生的絮体沉降性能好,而且可以显著减少絮凝剂的投加量,并且对原水浊度、UV_(254)、叶绿素a、氨氮都有较好的去除效果。
多级AO-MBR工艺用于污水处理厂提标扩建工程设计

班定营污水处理厂提标扩建工程总规模7万m~3/d,其中提标工程2万m~3/d,扩建工程5万m~3/d,提标扩建后出水水质达到《地表水环境质量标准》(GB3838-2002)类Ⅴ类水体标准。扩建工程采用多段多级AO生物池+MBR+臭氧消毒工艺。提标工程将现状TU氧化沟改造为多段多级AO生物池,并针对现状一级B出水新建1万m~3/dV型滤池。新建滤池出水与现状滤池出水及扩建部分的MBR膜池出水在臭氧消毒池前配水井进行勾兑,经过臭氧消毒后达标回用。介绍了提标扩建工程工艺流程、核心工艺选择、设计参数情况,并总结了设计特点。
Contrast sensitivity in 14 MeV fast neutron radiography

Fast neutron radiography(FNR)is an effective non-destructive testing technique. Due to the scattering effect and low detection efficiency, the detection limit of FNR under certain conditions cannot be determined. In order to obtain the minimum detectable thickness by FNR, we studied the contrast sensitivity of FNR lead samples, both theoretically and experimentally. We then clarified the relationship between pixel value and irradiation time, and sample materials and thickness. Our experiment, using a 4-cm-thick lead sample, verified our theoretical expression of FNR contrast sensitivity.
A New Mixed-metal Monophosphate: Ba_2Bi_2Co(PO_4)_4

A new member of mixed-metal Ba_2Bi_2M~(II)(PO_4)_4 monophosphate, namely Ba_2Bi_2Co(PO_4)_4, was synthesized by solid state method and characterized by X-ray single-crystal diffraction and powder diffraction for the first time. It crystallizes in the orthorhombic system with space group Pnma (No. 62) and features a 3D architecture built up of adjacent zig-zag linear structures of [CoP_4O_(16)]_∞ along [100], and further connected by [Bi_2O_(11)] dimers to form a 3D framework, where the Ba~(2+) are located in the free space. The stereochemical activity of the Bi~(3+) lone pair has also been discussed. The result of magnetic property measurement confirms the antiferromagnetic property of Ba_2Bi_2Co(PO_4)_4.
Statistically Extrapolated Nowcasting of Summertime Precipitation over the Eastern Alps

This paper presents a new multiple linear regression (MLR) approach to updating the hourly, extrapolated precipitation forecasts generated by the INCA (Integrated Nowcasting through Comprehensive Analysis) system for the Eastern Alps. The generalized form of the model approximates the updated precipitation forecast as a linear response to combinations of predictors selected through a backward elimination algorithm from a pool of predictors. The predictors comprise the raw output of the extrapolated precipitation forecast, the latest radar observations, the convective analysis, and the precipitation analysis. For every MLR model, bias and distribution correction procedures are designed to further correct the systematic regression errors. Applications of the MLR models to a verification dataset containing two months of qualified samples, and to one-month gridded data, are performed and evaluated. Generally, MLR yields slight, but definite, improvements in the intensity accuracy of forecasts during the late evening to morning period, and significantly improves the forecasts for large thresholds. The structure–amplitude–location scores, used to evaluate the performance of the MLR approach, based on its simulation of morphological features, indicate that MLR typically reduces the overestimation of amplitudes and generates similar horizontal structures in precipitation patterns and slightly degraded location forecasts, when compared with the extrapolated nowcasting.
A New Tetranuclear Silver Complex [Ag_4(MMPzA)_2(dmPz)_4(H_2DPC)_2](H_2O)_4 and Its Antibacterial Activity

A new tetranuclear silver(I) complex with the formula of [Ag_4(MMPzA)_2(dmPz)_4(H_2DPC)_2](H_2O)_4 (1, MMPzA = mono(3,5-bimethyl-pyrazolmethyl)amine), dmPz = 3,5-dimethylpyrazole, H_2DPC = pyridine-3,4-dicarboxylic acid) has been synthesized and characterized by single-crystal X-ray diffraction method. The title complex crystallizes in the triclinic system, space group P1 with a = 10.5532(13), b = 11.5071(18), c = 13.3951(17) A, α = 97.3190(10), β = 106.7360(10), γ = 108.0770(10)o, V = 1438.3(3) A~3, Z = 1, D_c = 1.691 g/cm~3, F(000) = 736, μ = 1.421 mm~(-1), the final R = 0.0400 and wR = 0.0942 for 5097 observed reflections (I > 2σ(I)). The intermolecular hydrogen bonding interaction extends the complex into a 1D chain structure. In addition, the complex was tested in vitro for its antibacterial activity and it exhibited significant activity, especially against penicillium.
Numerical simulation study on air quality in aircraft cabins

Air pollution is one of the main factors that affect the air quality in aircraft cabins, and the use of different air supply modes could influence the distribution of air pollutants in cabins. Based on the traditional ceiling air supplymode used on the B737NG, this study investigated another 3 different kinds of air supplymodes for comparison: luggage rack air supplymode, jointmode combining ceiling and luggage rack air supply, and joint mode combining ceiling and individual air supply. Under the above 4 air supply modes, the air velocity, temperature and distribution of air pollutants in a cabin full of passengers were studied using computational fluid dynamics (CFD), and carbon dioxide (CO_2) and formaldehyde were selected as 2 kinds of representative air pollutants. The simulation results show that the joint mode combining ceiling and individual air supply can create a more uniform distribution of air velocity and temperature, has a better effect on the removal of CO_2 and formaldehyde, and can provide better air quality in cabins than the other 3 modes.