吴简中所见孙权时期户等制度的探讨

所谓户等制度,是指官府按居民家庭财产多少而划分户口等级的制度。关于秦汉时期如何征收家庭财产税、确定户等、评估家财等一系列作法,由于史料不足,还处于若隐若现之间。但是从西晋到南北朝,户分九品之制已经定型化。如果我们能找到从西汉的户分三等到南北朝的户分九品之间的过渡环节,则中国古代户等制度的发展变化过程就将更加明朗化。吴简的出土恰恰证明在孙权时期的长沙郡与临湘侯国境内,已经确立了三等九级的户等划分制度。但由于吴简的残缺,孙权时期户等制度还存在着许多难于通释的问题。     

Real‐time quadrupole mass spectrometer analysis of gas in borehole fluid samples acquired using the U‐tube sampling methodology

Sampling of fluids in deep boreholes is challenging because of the necessity of minimizing external contamination and maintaining sample integrity during recovery. The U‐tube sampling methodology was developed to collect large volume, multiphase samples at in situ pressures. As a permanent or semi‐permanent installation, the U‐tube can be used for rapidly acquiring multiple samples or it may be installed for long‐term monitoring applications. The U‐tube was first deployed in Liberty County, TX to monitor crosswell CO₂ injection as part of the Frio CO₂ sequestration experiment. Analysis of gases (dissolved or separate phase) was performed in the field using a quadrupole mass spectrometer, which served as the basis for determining the arrival of the CO₂ plume. The presence of oxygen and argon in elevated concentrations, along with reduced methane concentration, indicates sample alteration caused by the introduction of surface fluids during borehole completion. Despite producing the well to eliminate non‐native fluids, measurements demonstrate that contamination persists until the immiscible CO₂ injection swept formation fluid into the observation wellbore.     

Chemical and isotopic signatures of Na/HCO3/CO2‐rich geofluids,North Portugal

Geochemical and isotopic studies have been undertaken to assess the origin of CO₂‐rich waters issuing in the northern part of Portugal. These solutions are hot (76°C) to cold (17°C) Na–HCO₃ mineral waters. The δ²H and δ¹⁸O signatures of the mineral waters reflect the influence of altitude on meteoric recharge. The lack of an ¹⁸O‐shift indicates there has been no high temperature water–rock interaction at depth, corroborating the results of several chemical geothermometers (reservoir temperature of about 120°C). The low ¹⁴C activity (up to 9.9 pmC) measured in some of the cold CO₂‐rich mineral waters (total dissolved inorganic carbon) is incompatible with the presence of ³H (from 1.7 to 4.1 TU) in those waters, which indicates relatively short subsurface circulation times. The δ¹³C values of CO₂ gas and dissolved inorganic carbon range between ?6‰ and ?1‰ versus Vienna‐Peedee Belemnite, indicating that the total carbon in the recharge waters is being diluted by larger quantities of CO₂ (¹⁴C‐free) introduced from deep‐seated (upper mantle) sources, masking the ¹⁴C‐dating values. The differences in the ⁸⁷Sr/⁸⁶Sr ratios of the studied thermal and mineral waters seem to be caused by water–rock interaction with different granitic rocks. Chlorine isotope signatures (?0.4‰ < δ³⁷Cl < +0.4‰ versus standard mean ocean chloride) indicate that Cl in these waters could be derived from mixing of a small amount of igneous Cl from leaching of granitic rocks.     

The Impact of Global Financial Crisis on the Mechanism of Economic Growth in Russia

A noted specialist on the Russian economy presents an assessment of the impact of the global financial crisis on the mechanism of the country's economic growth. Focusing on the demand side of the economic ledger, the author explores the question of whether Russia will be able to re-attain the high economic growth rates of the period from 2000 to 2007 after recovering from the crisis. The paper analyzes the sharp drop in production in 2008 and the first quarter of 2009, attributing most of the damage to liquidity problems and declines in the price of oil. Empirical evidence is based primarily on data collected by the author from the Central Bank of Russia and the country's federal bureau of statistics (Rosstat). Journal of Economic Literature, Classification Numbers: E010, E200, E660, F210, G010. 11 figures, 3 tables, 29 references.     

“二里头五期”遗存分析及其相关问题

所谓“二里头五期”遗存,实质上是包含了不同年代、不同时期遗存的混合体,化性质与二里头化—至四期不同,属早商化。二里头二号宫殿的废弃、偃师商城小城之始建以及郑州商城开始进入最繁盛期的时间大体同步,均是在二里头四期(或先商第一段第Ⅱ组)与早商第二段第Ⅲ组之际,表明夏商分界当在此时。     

说花园庄东地甲骨卜辞的“丁”——附:释“速”

最近公布的殷墟花园庄东地甲骨卜辞中,多次出现一位当时还活着的、称为“丁”的人物,从卜辞内容可以看出其地位甚高。本文主要通过指出这批卜辞中与历组一类占卜同事的一组卜辞,肯定了“丁”就是当时的商王武丁。以“丁”称呼时王武丁,究竟应该如何解释尚待进一步研究。同时,也可以进一步推定这批卜辞的时代,当为武丁晚期而非整理者认为的“武丁前期”。此外,这批卜辞中多次出现的一个整理者隶定作“”的字,应释为“速”,意为“召”、“召请”。旧有殷墟卜辞中一个或释读为“眚”、“软”、“喘”等的字,应释为“” ,读为咳嗽之“嗽”。     

UNOFFICIAL COINAGE IN THE THIRD CENTURY ad IN THE GALLO‐ROMAN WORLD: CHEMICAL AND PHYSICAL ANALYSES FOR DETERMINING THE LOCALIZATION OF THE WORKSHOP*

The third century ad was a complex period of crisis in the Roman world. In this paper, official and unofficial antoniniani, and double sestercii and sestercii, were analysed by fast neutron activation analysis (FNAA) to determine the alloys used by the craftsmen for producing forgeries. Moreover, at Châteaubleau, archaeologists discovered antoniniani and bronze forgeries from Postumus. Similar materials have been found in other hoards. They are believed to have been produced by a workshop called ‘atelier II’ by numismatists. The question was whether it is possible to differentiate the Châteaubleau production from the atelier II production.     

山东危山西汉墓出土陶器彩绘颜料研究

为研究山东危山西汉墓出土彩绘陶器颜料成分,采用偏光显微镜、显微拉曼光谱仪和扫描电子显微镜-能谱仪进行了分析。研究结果显示,危山汉墓陶器彩绘颜料有朱砂、铅丹、中国紫(汉紫BaCuSi2O6)、铁红、铁黑、白土等。中国紫颜料首次在山东省的发现,扩大了该颜料的使用区域,具有重要的考古学意义。另外,还在紫色颜料中分析出了BaCu2Si2O7蓝色晶体,这是继中国蓝中国紫之后的又一重大发现。     

南京堂子街太平天国山水画考辨

南京堂子街太平天国壁画中有四幅重要的山水画已经相关专家考释并命名。但根据壁画内容及对画中地点的考证,现有命名方式的合理性遭到质疑。对金陵图咏进行脉络梳理之后可发现这四幅山水画的原形应为清乾隆至同治间《金陵四十八景》中的四幅。太平天国壁画历来有为政治、军事服务的传统,故军事因素应是对金陵四十八景中四景的选取原则。     

The role of the stress regime on microseismicity induced by overpressure and cooling in geologic carbon storage

Fluid injection in deep geological formations usually induces microseismicity. In particular, industrial‐scale injection of CO₂ may induce a large number of microseismic events. Since CO₂ is likely to reach the storage formation at a lower temperature than that corresponding to the geothermal gradient, both overpressure and cooling decrease the effective stresses and may induce microseismicity. Here, we investigate the effect of the stress regime on the effective stress evolution and fracture stability when injecting cold CO₂ through a horizontal well in a deep saline formation. Simulation results show that when only overpressure occurs, the vertical total stress remains practically constant, but the horizontal total stresses increase proportionally to overpressure. These hydro‐mechanical stress changes result in a slight improvement in fracture stability in normal faulting stress regimes because the decrease in deviatoric stress offsets the decrease in effective stresses produced by overpressure. However, fracture stability significantly decreases in reverse faulting stress regimes because the size of the Mohr circle increases in addition to being displaced towards failure conditions. Fracture stability also decreases in strike slip stress regimes because the Mohr circle maintains its size and is shifted towards the yield surface a magnitude equal to overpressure minus the increase in the horizontal total stresses. Additionally, cooling induces a thermal stress reduction in all directions, but larger in the out‐of‐plane direction. This stress anisotropy causes, apart from a displacement of the Mohr circle towards the yield surface, an increase in the size of the Mohr circle. These two effects decrease fracture stability, resulting in the strike slip being the least stable stress regime when cooling occurs, followed by the reverse faulting and the normal faulting stress regimes. Thus, characterizing the stress state is crucial to determine the maximum sustainable injection pressure and maximum temperature drop to safely inject CO₂.