BNL/AGS和CERN/SPS能区的相对论性核—核碰撞物理

在本文中,我们讨论了目前 BNL/AGS 和 CERN/SPS 能区的相对论性核一核碰撞的物理。内容主要有:相对论性核一核碰撞的整体行为,领头重子的快度行为,重子与介子的横动量谱,奇异性产生,J/ψ压低,光子和氢子对的热力学发射,Bose-Einstein 关联,核阻止本领与核密度等。     

强度干涉学中的2π关联函数

摘要：计算了强度干涉学中的2π关联函数和Yano-Koonin的Gaussian源、Pratt膨胀源模型下的具体关联函数形式，并用蒙特卡罗方法模拟计算了两种模型下的2π关联函数和源的半径。结果表明，在高温、小膨胀速度时，两种关联函数公式之间的差别很小，在CERN和BNL能区可使用任一公式。     

2008国际Top物理会议

在欧洲核子中心（CERN）建造的大型强子对撞机于2008年正式开始运行，LHC上的实验将会在TeV能区揭示和探询超出标准模型的新物理现象，直接导致物理学新的突破，使粒子物理研究进入一个新的时代。在检验标准模型以及寻找新物理两方面，Top夸克物理都将起到非常重要的作用。     

LHC实验中双玻色子W±Z产生截面测量

欧洲核子中心(CERN)建造的大型强子对撞机(LHC)是槡s=14TeV的质子-质子对撞.在LHC上的ATLAS实验中,通过对衰变末态中的电子和缪子的分析,研究了标准模型理论中的双玻色子W±Z产生截面的灵敏性.同时,通过Monte Carlo模拟数据样本,也研究了双玻色子信号测量中本底的影响.研究表明,在最初的0.1fb-1积分亮度下,标准模型双玻色子W±Z信号的灵敏度可以好于5σ.     

VEPP-2000上类时中子和质子形状因子的测量（英文）

利用正负电子对撞机VEPP-2000上SND和CMD-3探测器从2011至2012年获取的对撞数据,给出了从产生阈值到2GeV能区e~+e~-nn和e~+e~-→pp的实验结果.同时,讨论了核子的电磁形状因子,并对结果的改进进行了展望.     

LHC上的重大进展——发现Higgs粒子

2012年7月,欧洲核子中心CERN的大型强子对撞机（LHC）上的CMS与ATLAS实验组相继宣布发现了质量在125GeV附近的新粒子．其后,基于更多的数据和更深入的分析,CERN于2013年3月14日发表声明：“新的结果表明CERN发现的粒子是Higgs玻色子”．在简要回顾标准模型Higgs的理论以及在LHC之前的寻找结果之后,我们将结合近年来参-9CMS实验及Higgs寻找的工作经历,详细介绍LHC上Higgs玻色子的发现历程,以及对Higgs质量、耦合、自旋、宇称等性质的测量现状．     

相对论重离子擦边对撞中相干光致产生过程（英文）

STAR、ALICE和ATLAS合作组最近在相对论重离子擦边对撞中观测到了J/ψ和双轻子的产额在极低横动量下存在显著的反常增强。考虑了冷核物质效应和热核物质效应的强子产生无法解释这种增强，而考虑了核重叠区域的相干光致产生的计算结果可以很好地描述实验数据。这些实验和理论结果表明在相对论重离子擦边对撞中存在相干光致产生过程，为我们探测夸克胶子等离子体提供了新的探针。本文回顾和总结了近些年来擦边重离子对撞中相干光致产生的实验和理论研究进展。     

基于RS与GIS技术的土地利用／覆盖调查——以佛山市禅城区为例

以佛山市禅城区为研究试验区，获取了研究区2005年的SPOT5卫星图像，并以此图像为基础，提取土地利用／覆盖现状信息．再利用GIS技术建立土地利用基础数据库。其结果表明，利用遥感和GIS技术能准确地反映了土地利用现状信息。并能快速更新土地利用现状数据库，是土地利用／覆盖调查的有效技术手段。     

视点

聚焦 大型强子对撞机撞开发现之门 9月10日，科学家在靠近法国和瑞士的地下室开启了大型强子对撞机，由此开始了高速粒子对撞系列实验。     

中国基础科学领域的大型实验

正北京正负电子对撞机北京正负电子对撞机是我国的第一台高能加速器,1984年开工建造,1988首次实现了正负电子对撞。1992年τ轻子质量测量的精确结果,纠正了过去τ轻子质量约7MeV实验偏差,并把精度提高了10倍。2004年1月,北京正负电子对撞机进行重大改造工程启动,采用国际先进的双环对撞技术,将对撞性能量大幅提高。可控核聚变实验装置2009年,世界上首个全超导非圆截面托卡马克核聚变实验装置首轮物理放电实验取得成功,标志着我国站在了世界核聚变研究的前端。全超导托卡马克核聚变实验装置装置,其运行     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.