Numerical simulation of mylonitization and structural controls on fluid flow and mineralization of the Hetai gold deposit,west Guangdong,China

The Hetai gold deposit (HGD) is a typical altered mylonite type gold mine in a ductile shear zone in western Guangdong, China. Geomechanical simulations of the HGD were carried out in this paper to examine the importance of the dilation‐driven fluid circulation in gold mineralization. The results show that three evenly‐spaced NNE shear zones of enhanced dilation are produced in the study area. The calculated principal compressive stress in the X direction in these zones ranges between ?420 and ?650 MPa, in line with estimates of ore‐forming pressure (fluid pressure). Ore forming fluid is focused into these features, as observed in the field. The calculated differential stress decreases from 275~350 to 148~225 MPa during the formation of mylonite zones. These, together with geological structural analysis and fluid pressure measurements, indicate that the mylonitization zone can provide a place of fluid focusing and a favorable environment for gold mineralization.     

论新疆民间特色工艺的现代化发展

新疆的民间工艺不仅种类繁多,而且极具地域特色。为了更好地传承民间艺术、发扬民族文化,应该多途径地将现代设计理念与民间工艺精华有效结合,从而促进其发展。     

阅微草堂收藏诸老尺牍

<阅微草堂收藏诸老尺牍>二十一通,皆清大学士梁国治、朱珪、刘墉、翁方纲、钱大昕、彭元瑞、王杰、戴震、吴省兰,及清宗室固山贝子弘旰写与纪昀的信函,其后有纪树馨收藏跋."阅微草堂"为纪昀的书斋名.纪昀(1724-1805),字晓岚,一字春帆,号石云,又号观弈道人、孤石老人.世称茶星、纪河间.清雍正二年六月出生于直隶献县(今属河北省沧县).乾隆十九年(1754)中进士,选为翰林院庶吉士.     

读明清俗语辞书札记

本是笔阅读明清俗语辞书的札记,共八条。其中五条主要是以明清俗语辞书为线索加以考证并据以纠补《汉语大词典》的有关阙失,另有三条主要是词语的语源辨正。     

试论滚兔岭文化

滚兔岭文化是三江平原地区具有代表性的一种早期铁器时代文化遗存,年代约当两汉时期.1984年,黑龙江省文物考古研究所发掘双鸭山市滚兔岭遗址并提出"滚兔岭文化"的命名.本文在已有成果的基础上,结合近年来新发表的一些相关材料,对该文化的基本内涵、特征及分期、谱系等重新进行了梳理、分析,进一步深化了对该文化的认识.     

Cause analysis of meager salaries of Sichuan primary school teachers in the 1930s

This paper aims to investigate the phenomenon wherein primary school teachers in Sichuan received low salaries in the 1930s. Compared with other professions among either physical or nonphysical jobs, primary school teachers had lower salaries, which were often paid in arrears and deducted. The main causes were instability, mismanagement, and an unbalanced distribution of education funds. __________ Translated from the Journal of Sichuan Normal University (Social Science Edition), 2004: 2     

The Pickup Problem: Consumers' Locational Preferences in Flow Interception

This article addresses the pickup problem , wherein patrons briefly interrupt their predetermined journeys to obtain a simple good, such as fast food or a video, and then resume their journeys. This is a problem from the class known as the flow-interception location problems. Traditional flow-interception location models (FILMs) are used to select service locations such that the intercepted flows are maximized. In these traditional models, only flow quantities are considered; these models do not consider where a pickup is made in a journey. However, in the real world, consumers often wish to obtain a product or service at or near a specific location along their trips. The pickup model (PUP) proposed here considers consumers' locational preferences, providing a much broader, more realistic approach than FILM (a special case of PUP) to problems in the private and public sectors. By considering which patrons are served where, PUP transforms the FILM into a flow-interception location-allocation model, providing a fruitful garden for further research. Geographic information systems and optimization engines are integrated to investigate the PUP model in real-world transportation systems. Reported findings demonstrate that the optimal locations identified by traditional models arise solely from network flow structure, whereas the optimal locations identified by PUP result from trade-offs between network flow structure and the importance of proximity to preferred locations. One important discovery is that PUP solutions are superior to those of traditional FILMs if consumers have locational preferences. Up-to-date, real-world transportation networks provide a realistic test-bed for this and other models of the flow-interception type.     

60年来新中国军事战略方针的创新发展

军事战略方针是全面计划、部署、指导平时与战时军事力量建设和运用的基本依据。建国初期,我国制定了"积极防御,决不先发制人"的战略方针;20世纪60年代初,提出了准备"早打、大打、打核战争"的军事战略方针;1985年中央军委扩大会议决定军队和国防建设指导思想实行战略性转变,重点应付可能发生的局部战争和武装冲突;在1993年的中央军委扩大会议上,江泽民主持制定了新时期的军事战略方针,即把军事斗争准备的基点放在打赢现代技术特别是高技术条件下的局部战争上。2004年6月,中央军委进一步充实和完善了新时期的军事战略方针。2007年,中共十七大报告提出了加快中国特色军事变革,做好军事斗争准备,提高军队应对多种安全威胁、完成多样化军事任务的能力的要求。     

Stability of Spatial Equilibrium*

Abstract. Asymptotic stability of equilibrium is often difficult to know when the number of variables exceeds four, since all eigenvalues of the Jacobian matrix are not analytically solvable. However, we obtain stability conditions for a general class of migration dynamics without computing eigenvalues. We show that a spatial equilibrium is stable in the presence of strong congestion diseconomies, but unstable in the presence of strong agglomeration economies. We also show existence of a stable equilibrium in the case of negligible interregional externalities, which is applicable to club goods, local public goods, and new economic geography.     

泽惠史林之作--评《中国科学技术史·度量衡卷》

《中国科学技术史·度量衡卷》是迄今为止最权威的中国度量衡史著作。该书以历代单位量值的演变作为主线 ,旁及中国度量衡的产生、发展、管理制度、相关的科学技术成就等 ,对中国度量衡史做了系统、全面的研究。该书修正了传统研究的不足 ,补充了以往的空缺 ,对相关历史现象的研究也提出了新的见解。该书的出版 ,为史学研究提供了可资借鉴的权威度量衡史著作。