Optimization Model to Enhance Sustainable Utilization of Resources

1　 IntroductionSustainable development is newly accepted as a objective or model of economic and socialdevelopmentin recentyears,which derived from ecological and environmental crisis duringhuman′s development.Its role of guidance for human′s socioeconomic development hasbeen increasingly expanded to various aspects of human society and nature. Sustainableutilization of resources is a critical factor for fully realizing socioeconomic sustainabledevelopmenton the basis of the equilibrium of …     

A Positive Comparative Study of Regional Human Resources Quality

1　IntroductionItiswellknownthathumanresourcesareessentialforeconomicoutput.Theinvestmentofhumanresourcescanbemeasuredintworespects,i.e.thequantityofhumanresourcesandthequalityofhumanresources.Theformerreferstotheamountofinvestedmanpow-erandthelatterreferstoefficiencywithwhichtheinvestedhumanresourcesbringeco-nomicoutput.Atpresent,socialeconomistsareoftheopinionthattheeconomicdevelop-mentlevelofaregionispositivelyinfluencedbythehumanresourcesquality.Withthede-velopmentofscienceandtechnology,t…     

Bimodal PE prepared with combined iron (II) and nickel (II) olefin polymerization catalysts

Iron (II) and nickel (II) complexes based on bis (imine) ligands are typical late-transition olefin poly- merization catalysts. As usual, nickel (II) catalysts can produce branched polyethylene (PE) even super branched PE of narrow molecular weight distri…     

Electron microprobe monazite Th-Pb dating and its constraints on multi-stage metamorphism of low-pressure pelitic granulite from the Jingshan Group in the Jiaobei terrane

U-Th-Pb chemical dating of monazite with the electron microprobe is a new method developed in the last dec-ade[1,2]. It is attracting more and more attention for its ad-vantages of quickness, cheapness and relative high reli-ability[3]. Although its precision (±10?30 Ma)[4,5] is not as high as the ion-probe (SHRIMP), it has very high spatial resolution (1?2 μm), more superior than other in-situ techniques for analyzing compositions of zoned monazite crystals of less than 50 μm in size. …     

构建个人MIDI音乐制作系统

ＭＩＤＩ是 ＭｕｓｉｃａｌＩｎｓｔｒｕｍｅｎｔ Ｄｉｇｉｔａｌ Ｉｎｔｅｒｆａｃｅ的英文缩写，中文意思为“乐器数字化接口”，是电子乐器与主控体（如键盘乐器和计算机）交互连接时能取得同步时的标准化协议。它的出现可以说是电子音乐的一场革命。谈到ＭＩＤＩ音乐制作，人们很容易想到合成器、编曲机、ＭＩＤＩ键盘、采样器等大量复杂昂贵的专业设备，而作为业余爱好者很难接触到这些设备，那么制作ＭＩＤＩ音乐也只能是一个梦想。然而随着电脑多媒体技术的发展，使得原来很多需要专业设备才能实现的功能现在可以通过计算机软件来模…     

Discovery of Late Paleozoic retrograded eclogites from the middle part of the northern margin of North China Craton

The northern margin of the North China Craton (NCC), located between the Paleo-Asian Ocean tectonic region on the north and the NCC on the south, is a key region for studying the tectonic evolution of NCC. A Pre-cambrian retrograded eclogite (2500 Ma or 1800 Ma) was reported in Baimashi near Hengshan Mountain in the NCC, which is characterized by the vermicular symplec-tite of diopside and plagioclase with absence of ompha-cite[1,2]. In Hongqiyingzi Group from the middle part of the …     

Expression and inhibitory activity analysis of a 25-kD Bowman-Birk protease inhibitor in rice

Bowman-Birk protease inhibitors (BBI), belonging to serine protease inhibitors, are well-studied storage and defense proteins widely existing in both dicoty- ledonous and monocotyledonous plants[1―3]. In dicoty- ledonous plants, the BBIs are about 8-kD p…     

THE FIBER MORPHOLOGY VARIATION OF TRIPLOID CLONE OF POPULUS TOMENTOSA CARR.AND ITS SUPPOSED HARVESTING AGE FOR THE PAPER INDUSTRY

According to the strategy for the development of China paper industry, wood as a pulping material resource will play more and more important roles in the coming years[1,2]. Due to the deficiency in forest resources, the wood harvesting of natural forest has been strictly constraint in China. So the intergradation of aforestation and manufacture of paper products has become an important way to ensure a reliable material resource for China paper industry[1,2,5]. Many fast growing wood projects …     

短时间电场,磁场刺激对鲫鱼胚胎生长发育影响的研究

较强电场及磁场对鲫鱼胚胎的辐照,能显著加快鲫鱼胚胎的发育和后期的生长速度。根据质子核磁驰豫提供的物质内部相互作用的信息,适时施予短时间的电场或磁场作用,有可能对细胞内的蛋白酶和生长激素的形成以及膜的通透性产生较强的影响。