共查询到20条相似文献，搜索用时 156 毫秒
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论如何培养大学生的信息意识和信息能力 总被引：2，自引：0，他引：2
本文论述了信息意识和信息能力的内涵和主要特征,阐述了信息意识和信息能力的重要性,分析了我国大学生信息意识和信息能力的现状及产生原因,提出了培养大学生信息意识和信息能力的途径和措施. 相似文献
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肖玉 《实验室研究与探索》2014,(7):157-160
阐述了示范中心在创新实验教学体系和实验管理体系等方面一些方法的探索和实践,探讨了培养学生的创新能力、工程实践能力和综合素质方法和措施,示范中心建立的实验教学体系和现代化的管理体系,提高了中心运行效率和设备的利用率,创新了实验中心的管理模式,推动了实验教学水平的提高,有效促进了学生高效合理的学习方式,提高了学生的创新能力、工程实践能力和综合素质,为培养创新型人才奠定坚实的基础。 相似文献
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科技奖励网上评审无论是从管理者角度,还是项目完成人的角度和评审专家的角度都取得了令人满意的效果,提高了评审的准确性和透明度。评审结果公示后减少了对项目实质性异议的来信,充分利用和调节了评审专家的评审时间,受到了本市和国内评审专家的好评,提高了管理效率。 相似文献
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任玉娥 《山西财经大学学报(高等教育版)》2007,10(Z1):40
互联网的出现,有力地影响了我们的思维方式和生活方式,也带来了一场金融革命,在这场革命中,电子商务和网络银行成为最活跃和最重要的组成部分,它们对原有的经营理念和服务理念提出了挑战,通过更合理更有效的客户服务和管理,提高了金融服务的质量,使得金融业获得了快速成长的驱动力。电子银行的发展给传统银行业提出了挑战,同时了给银行业发展带来了新的机遇。它改变了银行的业务模式与经营模式,并促使经营理念和服务理念不断创新,使得银行业正在逐步向智能化和网络化发展。 相似文献
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石兴泽 《聊城师范学院学报》2011,(1):1-9
傅斯年和陈垣是二十世纪著名的史学家,为中国现代史学研究和学科发展作出了很大贡献。共同的事业和学术追求打破了年龄和学历的障碍,促进了他们的交往,深化了其间的友谊。在推动中国现代史学发展的同时,他们用深情厚谊和高尚品格书写了很多动人的学术佳话,为中国现代知识分子的生活和心理历程留下了闪光的背影。 相似文献
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面对严峻的形势,青啤董事会和管理团队带领全体员工克服了各种困难,取得了销售、收入、利润持续增长的佳绩。公司实施了成功的营销策略和品牌策略,建立和完善了省一级的营销分支机构,强化了对市场的运营和掌控能力。 相似文献
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FANG Jun-hua 《重庆大学学报(英文版)》2006,5(2):107-110
Substituted plan in EIA mainly means a the treatment technology and the substituted site of wastewater plant, and it also includes the many kinds of environment protection measures. In principal, the substituted plan should reach the same aim and achieve … 相似文献
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INTRODUCTIONThecombustionoffossilfuelsgeneratesSO2andNOxpollutantscausingairpollutionandacidrain.Existingfluegasdesulfurization(FGD)scru-bbersareefficientforcontrollingSO2emission,butareincapableofremovingwater-insolublenitricoxide.WeandotherresearcheshadreportedtheuseofmetalchelateadditivesinFGDsystemsforcom-binedremovalofNOxandSO2(Shietal.,1996a;1996b;1996c;1997;LittlejohnandChang,1990;Tsaietal.,1989;Harriottetal.,1993).FeII(EDTA,ethylenediaminetetraacetate)isoneofthemostprom… 相似文献
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Ferrospheres in fly ashes from a coal-fired power plant were extracted by a magnetic separation technique and their microstructure was studied by scanning electron microscopy （SEM）, energy dispersive X-ray analysis （EDX） and environmental scanning electron microscopy （ESEM）. Ferrospheres in fly ashes show significant iron enrichment compared to their respective fly ashes. Iron oxides in ferrospheres mainly occur as minerals magnetite （Fe3O4） and hematite （α-Fe2O3）, which are derived mainly from the decomposition and oxidation of iron-bearing minerals in coal during combustion. EDX data indicate that ferrospheres also contain Si, S, Al and Ca resulting from quartz, mullite, anhydrite and amorphous materials. A large percentage of ferrospheres are commonly 5-50 μm in size. The microstructure of ferrospheres includes smooth, polygonal, dendritic, granular and molten drop characteristics. SEM coupled with EDX provided fast and accurate results of the microstructure and chemical composition of ferrospheres, and helped us to assess environmental issues related to the disposal and utilization of fly ashes. 相似文献
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环境风险评价中的不确定性问题和预警原则的应用 总被引：1，自引：1，他引：1
环境风险评价中经常遭遇不确定性问题,不确定性正是风险产生的重要原因之一。不确定性主要是由于我们的认知局限、信息欠缺和技术困难等原因造成的。这就需要我们在环境风险评价和决策中引入预警原则,并切实实施好这个原则。文章着重阐述了不确定性产生的原因、种类和分析方法,讨论了预警原则的由来、定义和引入的必要性,最后通过具体案例探究了实施预警原则的途径和方法。 相似文献
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An improved automatic voltage coordination control strategy(AVCCS) based on automatic voltage control(AVC) and battery energy storage control(BESC) is proposed for photovoltaic grid-connected system(PVGS) to mitigate the voltage fluctuations caused by environmental disturbances.Only AVC is used when small environmental disturbances happen,while BESC is incorporated with AVC to restrain the voltage fluctuations when large disturbances happen.An adjustable parameter determining the allowed amplitudes of voltage fluctuations is introduced to realize the above switching process.A benchmark low voltage distribution system including PVGS is established by using the commercial software DIg SILENT.Simulation results show that the voltage under AVCCS satisfies the IEEE Standard 1547,and the installed battery capacity is also reduced.Meanwhile,the battery’s service life is extended by avoiding frequent charges/discharges in the control process. 相似文献
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Low phosphorus (P) availability is one of the most important factors limiting plant growth in red soils across southeastern China. Many non-symbiotic microorganisms in rhizosphere can enhance P solubility, but little is known about the magnitude of their phosphorus-solubilizing ability (PSA) and the difference in phosphorus-solubilizing microorganisms (PSM) among plant species. The number of phosphorus-solubilizing microorganisms and their PSA in rhizosphere soils of 19 weed species in a citrus orchard on red soil at Changshan, Zhejiang, China, were investigated. Inorganic P (powdered phosphate rock, PR) and organic P (lecithin, OP) were respectively used as the sole P-source to examine the PSA of isolated microbes. The PS actinomycetes community varied greatly among the different weed rhizospheres while the PS fungus community showed to be most stable to the weed rhizosphere. The highest number of PR-PS and OP-PS bacteria was found in rhizosphere soil of Mollugo pentaphyll, and the highest number of PR-PS and OP-PS actinomycetes was found in rhizosphere soil of Polygonum lapathifolium. The highest number of PR-PS fungi was found in Erigeron annuus and Mollugo pentaphyll rhizosphere soil, and the highest number of OP-PS fungi was found in rhizosphere soil of Mazus stachydifolius. Mazus stachydifolius showed the strongest PR-PS ability (6340.75μg) while Eragrostis pilosa showed the strongest OP-PS ability (1301.84μg). The PR-PS ability and OP-PS ability of Mollugo pentaphyll was 4432.87μg and 1122.05μg respectively. A significant correlation between the number of PR-PSM and OP-PSM was found. Significant correlation was only found between the PR-PS fungi number and its PSA(r=0.75, P<0.05) and between the number of OP-PS fungi and its PSA(r=0.87, P<0.01}). It indicated that plant species had significant influence on components of the non-symbiotic PSM community and their activity in its rhizosphere soil. Fungi play a leading role in phosphorus solubilization in weed rhizopshere. It suggested that weed conservation could benefit soil microbe development in agroecosystems, especially in the initial stage of agroecosystem development because there is less organic carbon in bare soil. The results suggested that weed conservation could increase PSA of PSM. 相似文献
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本文通过对重庆四面山常绿阔叶林群落的ＮＭＤＳ排序，研究了该区植物群落分布与环境之间的相互关系，并应用植物群落的排序值与环境因子的多元回归分析给出了植物群落类型与生态梯度的定量环境解释。结果表明：ＮＭＤＳ排序较好地反映了植物群落与环境的变异。四面山常绿阔叶林群落类型及分布主要取决于海拔高度和土壤含水量，并可通过与环境参数的回归模型定量地确定。 相似文献
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小粒稻和大粒稻的生理研究,无疑对水稻育种和水稻栽培十分重要。本文采用小粒稻和大粒稻共6个品种:南泰8号、七桂早25,三黄占(小粒)、美果选、特青2号、双桂36(大粒)作为试验材料,于玻璃网室内盆栽,每盆4株,肥、水及其管理一致,播种后定期测量植株分蘖数、顶上4片的叶片、叶鞘、茎穗干物重,收割时进行常规考种。试验结果表明,~(32)P、~(14)C在小粒稻和大粒稻分蘖的分布(％)不同,大粒稻“美果选”比“特青 2号”和“双桂36”~(32)P在分蘖分布多,~(14)C在分蘖少,分蘖数也少,小粒稻“南泰8号”~(32)在分蘖分布(％)比“七桂早25”和“三黄占”多,分蘖数也多。小粒稻“南泰8号”和大粒稻“美果选”,生育后期植株干物质保留在叶片、叶鞘和茎秆节间比其余品种多,其余小粒稻和大粒稻叶片、叶鞘和茎秆干物重贡献给稻穗增重较多,“美果选”的分蘖干物重和植株地上部干物重,比其余大粒稻品种减轻。大粒稻,“美果选”和小粒稻“南泰8号”的充实粒数少,谷粒产量低。实验结果证实王永锐(1986)提出的高产水稻品种生育后期,确实存在有“两段式阶梯灌浆形式”,如大粒稻“特青2号”,“双桂36”,小粒稻“七桂早25”,“三黄占”,并认为这可作为水稻选育种和高产栽培的生理指标,以及作为水稻生理育种的指标。 相似文献
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Yoshifumi Nakagawa 《The Journal of environmental education》2018,49(2):164-176
ABSTRACTEnvironmental education as a theory and practice of ecopedagogical simulation positively acknowledges various accidental happenings in the learner's experience. By working with and on the accidents, the learner is encouraged to imagine the real object that escapes his/her experience and thus cannot be and should not be reduced into human subjectivities. For less anthropocentric environmental education and its research, this article empirically and conceptually develops the ecopedagogy as/in escapeScape—or (e)Scape—via three case studies derived from various experientially educative settings related to tourism. 相似文献
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Design of general multivariable process controllers is an attractive and practical alternative to optimizing design by evolutionary algorithms （EAs） since it can be formulated as an optimization problem. A closed-loop particle swarm optimization （CLPSO） algorithm is proposed by mapping PSO elements into the closed-loop system based on control theories. At each time step, a proportional integral （PI） controller is used to calculate an updated inertia weight for each particle in swarms from its last fitness. With this modification, limitations caused by a uniform inertia weight for the whole population are avoided, and the particles have enough diversity. After the effectiveness, efficiency and robustness are tested by benchmark functions, CLPSO is applied to design a multivariable proportional-integral-derivative （PID） controller for a solvent dehydration tower in a chemical plant and has improved its performances. 相似文献