潜水含水层水压力传递的时效性

传统的渗流模型研究中，忽略了渗流场中水压力传递的时效性。本文针对潜水含水层井流问题，分析了井流场的特征。在前人研究的基础上，作者详尽地推导了上部入渗补给为常量情况下的降落漏斗半径和水压力传递速度与时间的关系式，并对某电厂水源地进行了计算。     

脉冲星γ射线辐射光度的分析

本文作者在脉冲星γ射线辐射的极冠模型的基础上，考虑光子在磁层中的级联过程，提出了级联过程中能量转化效率的概念并得出了转化效率公式，分析表明，能量转化效率只和磁场强度有关，与周期无关，考虑能量转化效率，我们计算了极冠模型的γ射线辐射光度，得出了可以和观测值比较的结果，本文结果倾向于支持脉冲星γ射线辐射的极冠模型。     

THE URBAN FUNCTION OF SUZHOU ON BASIS OF THE SHANGHAI-SUZHOU RELATIONSHIP

１ＩＮＴＲＯＤＵＣＴＩＯＮＷｉｔｈｔｈｅａｃｃｅｌｅｒａｔｉｏｎｏｆｔｈｅｅｃｏｎｏｍｉｃｇｌｏｂａｌｉｚａ-ｔｉｏｎｔｈｅｇｒａｄｕａｌｓｈａｐｉｎｇｏｆｔｈｅｎｅｗｉｎｔｅｒｎａｔｉｏｎａｌｄｉｖｉ-ｓｉｏｎｏｆｌａｂｏｒａｎｄｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆｔｈｅｔｒａｎｓｎａｔｉｏｎａｌｃｏｒｐｏｒａｔｉｏｎｓｔｈｅｗｏｒｌｄｕｒｂａｎｓｙｓｔｅｍｓｈａｖｅｂｅｇｕｎａｎｅｗｒｏｕｎｄｏｆｉｎｔｅｇｒａｔｉｏｎ．Ｏｎｏｎｅｈａｎｄｔｈｅｃｉｔｉｅｓａｌｌｏｖｅｒｔｈｅｇｌｏｂｅａｒｅ…     

空间无碰撞激波的数值研究

无碰撞激波是空间等离子体和宇宙等离子体中的重要物理现象。文中评述了数值研究空间无碰撞激波的两种方法－粒子模拟和混合模拟，给出了准垂直和准平行无碰撞激波的数值研究结果。还指出了一些尚未解决的研究问题。     

大坂山含“铬矿物”石英闪长岩岩石特征

大坂山“铬矿物”产出于灰绿色中细粒石英闪长岩中,笔者从区域地质特征、岩石学、岩石化学、地球化学、同位素等方面对石英闪长岩进行了较全面的研究后认为,该套岩石成因为壳幔混合型,构造环境为北祁连加里东洋盆收缩阶段板块俯冲作用下形成的火山弧,岩石成岩时代为早奥陶世,铬矿物形成深度约30km,受区域性岩石圈断裂带控制。     

配饵中不同大豆浓缩蛋白含量对中华绒螯蟹消化酶活力的影响(英文)

研究了大豆浓缩蛋白作为饵料蛋白源对中华绒螯蟹幼蟹消化酶活力的影响,初步探讨了中华绒螯蟹对饵料蛋白源的内在适应机理。根据中华绒螯蟹的营养需求,用大豆浓缩蛋白替代鱼粉作为蛋白源配制成6种近似等蛋白等能的饵料,其中大豆浓缩蛋白在饵料中的含量分别为0、11%、22%、33%、44%和56%(分别替代鱼蛋白质量的0、18.64%、37.93%、56.90%、77.19%和100%),对照饵料全部以鱼粉作为蛋白源。用上述6种饵料喂养中华绒螯蟹50 d后,测定蟹肝胰腺各种消化酶活力。结果表明:随着饵料中大豆浓缩蛋白含量的升高,胃蛋白酶和胰蛋白酶活力均呈降低之势。当大豆浓缩蛋白含量达到44%时,与全鱼粉对照组相比,胃蛋白酶和胰蛋白酶活力显著性降低(P<0.05);同时,淀粉酶稍呈升高之势,而纤维素酶则稍呈降低的趋势;A/T比例呈显著上升的趋势,当大豆浓缩蛋白含量达44%时,与对照组有显著性差异,说明河蟹对植物蛋白有很强的适应性。     

East Asian summer monsoon intensity inferred from iron oxide mineralogy in the Xiashu Loess in southern China

The Xiashu Loess, in comparison to the well-studied loess sequences in the Chinese Loess Plateau (CLP), provides a good opportunity for studying East Asian monsoon variations from a southern China perspective. Here we present a study of the iron oxide mineralogy of the Xiashu Loess using integrated geochemical and diffuse reflectance spectroscopy (DRS) measurements as well as magnetic data. Our results show that the free iron oxide (Fe_d) to total iron (Fe_t) ratio (Fe_d/Fe_t), hematite (Hm) to goethite (Gt) ratio (Hm/Gt) and saturation isothermal remanent magnetization (SIRM) to magnetic susceptibility (χ) ratio (SIRM/χ) all indicate particularly strong summer monsoons during the formation of paleosols PS5 and PS4 (equivalent to Marine Isotope Stage 13 and 11, respectively). However, magnetic susceptibility and Fe_d/Fe_t are not consistently reliable indicators of summer monsoon intensity for the whole section. Our results indicate that a multi-proxy approach can give a more reliable summer monsoon intensity reconstruction. The summer monsoon shows a cooling trend and a declining of precipitation from 0.5 to ～0.3 Ma, after which it becomes warmer and wetter towards the top of paleosol PS1 (equivalent to MIS 5). However, PS1 was formed under a relatively cooler temperature and wetter soil conditions in comparison to PS5 and PS4. Such supra-orbital variations in the East Asian summer monsoon superimposed on the effects of glacial–interglacial cycles in southern China are also reflected in the 0.4–0.5 Ma cycle of marine carbon isotopes in the global ocean, possibly indicating a strong link between terrestrial weathering and the global carbon cycle.     

G359.95-0.04: an energetic pulsar candidate near Sgr A*

We report the discovery of a prominent non-thermal X-ray feature located near the Galactic centre that we identify as an energetic pulsar wind nebula. This feature, G359.95-0.04, lies 1-lyr north of Sgr A* (in projection), is comet like in shape, and has a power-law spectrum that steepens with increasing distance from the putative pulsar. The distinct spectral and spatial X-ray characteristics of the feature are similar to those belonging to the rare class of ram-pressure confined pulsar wind nebulae. The luminosity of the nebula at the distance of Sgr A*, consistent with the inferred X-ray absorptions, is   L_x ∼ 1 × 10³⁴ erg s⁻¹  in the 2–10 keV energy band. The cometary tail extends back to a region centred at the massive stellar complex IRS 13 and surrounded by an enhanced diffuse X-ray emission, which may represent an associated supernova remnant. Furthermore, the inverse Compton scattering of the strong ambient radiation by the nebula consistently explains the observed TeV emission from the Galactic centre. We also briefly discuss plausible connections of G359.95-0.04 to other high-energy sources in the region, such as the young stellar complexes IRS 13 and SNR Sgr A East.     

Determination of Early Paleozoic metamorphic event in the Longshan Complex and its geological implicationSCIEI北大核心CSCD

长期以来,陇山杂岩的归属问题一直存在争议。本文对出露于秦岭-祁连山结合部位的陇山杂岩中石榴黑云斜长片麻岩和石榴斜长角闪岩进行了详细的岩石学、P-T温压计算、独居石和榍石U-Pb年代学研究。通过详细的岩相学观察,石榴黑云斜长片麻岩的变质峰期矿物组合为石榴子石+黑云母+斜长石+石英;石榴斜长角闪岩中则识别出了以石榴子石+单斜辉石+角闪石+斜长石+石英为峰期的变质矿物组合。通过传统温压计计算,石榴黑云斜长片麻岩(样品21LS40)和石榴斜长角闪岩样品(样品21LS42-1)的峰期变质P-T条件分别为700℃、0.72GPa和710℃、0.74GPa。激光剥蚀电感耦合等离子体质谱(LA-ICP-MS) U-Pb数据表明,石榴黑云斜长片麻岩中独居石的206Pb/238U的加权平均年龄为407~435Ma。石榴斜长角闪岩中榍石的下交点年龄分别为410±7Ma、409±5Ma和426±10Ma,榍石中Zr含量温度计的计算结果分别为750℃、751℃和748℃(假定压力为0.7GPa)。本文从变质作用的角度出发,将陇山杂岩与秦岭杂岩进行温压条件和变质时代对比研究,认为陇山杂岩与东秦岭杂岩高压-超高压岩石的最后一期退变质作用和西秦岭天水地区的秦岭杂岩麻粒岩相变质作用类似,可能为北秦岭造山带的西延。