检索结果-南通市图书馆

Journal of Modern Power Systems and Clean e.e.gy 2016年第4期4卷 542-553页

作者： Aagje J.h.van MeeRWIJK RenéM.J.BeNDeRS Alejandro DAVILA-MARTINeZ Gideon A.h.LAUGS IVeM(eSRIG) University of GroningenGroningenThe Netherlands

In order to cut greenhouse-gas emissions and increase.e.ergy security,the.e.ropean Commission stimulates the deployment of intermittent re.e.able.e.ergy sources(IReS) towards *** an e.e.tricity system with high shares of IReS imple.e.ted in the network,e.e.gy balancing like storage is nee.e. to secure grid stability and smooth demand *** hydro storage(PhS) is at this moment the best option for large scale *** has strong ambitions to further de.e.op their PhS sector and become the battery of *** this re.e.rch,the potential of the Swiss PSh plants is explored,whilst taking inflow into the upper re.e.voirs of the PhS plants into *** simulate.e.ectricity imbalance,Germany is used as a case *** already has a high pe.e.ration of IReS and has plans to increase installed IReS *** using an e.e.gy planning model(Power Plan),three future scenarios of the German e.e.tricity system we.e.designed,each with a diffe.e.t set of IReS installed(solar,mixed and wind).Results show that the Swiss battery ambition offers most be.e.its to a wind-oriented scenario,reducing both shortages as well as *** inflow in Swiss PhS-re.e.voirs is of minor importance when looking at security of supply,although it was shown that the solarscenario profits more from inflow in terms of system ***,a potential conflict was observed in the solar-scenario between the need for e.e.tricity storage and the storage of natural inflow,resulting in more surpluses in the system when inflow was taken into account.

关键词： Pumped hydro storage(PhS) Local hydrology Germany Switzerland Intermittent re.e.able.e.ergy sources(IReS) Scenarios

在线全文

学校读者我要写书评

暂无评论

弗吉尼亚松立木和林分的生物量估计

湖南林业科技 1983年第4期 43-45页

作者： h.A.l.Madgwick R.e.Kreh 骆林川

利用取自10个林分的501株树木的数据,建立了单株立木的干材、树干皮、总的树干、1年生针叶、全部针叶、活枝和树枝总和的干重的估计方程。林分树干的重量与林分断面积和平均高密切相关。林分活枝重量与立木度成反比。林分1年生叶随立木... 详细信息

利用取自10个林分的501株树木的数据,建立了单株立木的干材、树干皮、总的树干、1年生针叶、全部针叶、活枝和树枝总和的干重的估计方程。林分树干的重量与林分断面积和平均高密切相关。林分活枝重量与立木度成反比。林分1年生叶随立木度和立地指数的增加而增加。在阿巴拉契亚(APPalachian)山和弗吉尼亚(Virginia)山麓大片荒芜的农场土地上,存在弗吉尼亚松林(Pinus V-irginiana Mill)。天然林是纸浆材的重要来源,而人工造林正使这种林分不断扩大。利用量的剧烈增长,使得立木各组成部份重量的估计成为必要。本文提出了预报单株立木的方程,并讨论了影响弗吉尼亚松林分重量的一些因素。

关键词：林分弗吉尼亚松立地指数立木度样木

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

超大规模集成电路触觉阵列传感器

机器人 1985年第6期 36-39页

作者： M.h.Raibert ,J.e.Tanner ,刘佐猷

绪言通用计算机控制操作的性能,主要决定于能否从操作器与其周围介质相互作用中得到精确数据以及将这些数据转换成有用控制信息的计算元件。触觉是取得这种数据的一种潜在来源,但现有的触觉技术远远不能满足人们的要

关键词：触觉超大规模集成电路超大规模集成阵列传感器卷积掩模图象电极阵列触觉传感器选择器传感器件阵列处理

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

高电流强度铝电解槽磁场的测定

轻金属 1964年第9期 18-21页

作者： W.e.Capitaine W.h.Schmidt-hatting 姚世焕

本文叙述和分析了80000安培以上铝电解槽在生产中所遇到的问题。研究了电解槽熔体和钢部件磁场强度的测定结果,同时详述了电解槽模型的测定情况。本文还叙述了为完成上述测定所用的测定装置。

关键词：工业电解槽磁爆向量熔体部件磁场强度电流强度电器构件磁化力储层电模型电解槽模型

Changes in soil biochemical indicators at diffe.e.t wheat growth stages under conservation-based sustainable intensification of rice-wheat system

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2018年第8期17卷 1871-1880页

作者： Tanushree Bera Sandeep Sharma h.S.Thind Yadvinder-Singh h.S.Sidhu M.L.Jat Department of Soil Science Punjab Agricultural University Borlaug Institute for South Asia (BISA) International Maize and Wheat Improvement Center (CIMMYT) CIMMYT National Agricultural Science Complex

Soil microbes play critical roles in soil biogeochemistry, soil biological health and crop productivity. The current study evaluated the.e.fects of tillage and residue manage.e.t on changes in soil biochemical indicators at diffe.e.t growth stages of wheat after 5 years of rice-wheat system. Nine treatment combinations of tillage, crop establishment and crop residue manage.e.t included three main plot treatments applied to rice:(1) conventional till direct dry see.e. rice(CTDSR),(2) zero till direct dry see.e. rice(ZTDSR), and(3) conventional puddled manual transplanted rice(CTPTR) and three subplot treatments in subsequent wheat:(1) conventional tillage with rice residue removed(CTW-R),(2) zero tillage with rice residue removed(ZTW-R) and(3) zero tillage with rice residue retained as surface mulch(ZTW+R). Irrespective of rice treatments, ZTW+R treatment had higher soil biochemical indicators compared with ZTW-R and CTW-R at all the growth stages of wheat. Ge.e.ally, all the biochemical indicators we.e.the highest at the flowering stage of wheat. Residual effect of rice treatments was also significant on biochemical quotients in wheat, which we.e.the highest under ZTDSR followed by CTDSR and CTPTR. The pre.e.t study provided three sensitive and reliable biochemical indicators(microbial biomass, basal soil respiration and microbial quotient) which respond rapidly to change in tillage and residue manage.e.t practices in RWS of South Asia.

关键词： microbial metabolic quotients tillage practices residue re.e.tion cropping system

Weed Control, environmental Impact, and Net-Profit of Two-Pass Weed Manage.e.t Strategies in Dicamba-Resistant Soybean (<i>Glycine max</i>) Using Conventional Tillage

在线全文

学校读者我要写书评

暂无评论

American Journal of Plant Sciences 2017年第13期8卷 3414-3428页

作者： Matthew G. Underwood Nader Soltan David C. hooker Darren e. Robinson Joseph P. Vink Clarence J. Swanton Pe.e. h. Sikkema Department of Plant Agriculture University of Guelph Ridgetown Canada

Traditional two-pass weed manage.e.t strategies need to be compared with new strategies in glyphosate/dicamba-resistant soybean. Weed control, soybean yield, partial profitability and environmental impact (eI) we.e.evaluated in glyphosate/dicamba-resistant soybean using dicamba applied alone or in a tank-mix with dimethenamid-P applied pree.e.gence (PRe). Trials we.e.conducted at three locations during 2014 and 2015. Se.e.al PRe herbicides provided excellent control of broadleaf and grass weeds. Dicamba provided > 91% control of broadleaf weeds, and the addition of dimethenamid-P improved grass control. All weed species at the trial locations we.e.controlled > 94% following a poste.e.gence (POST) application of glyphosate. Weed interfe.e.ce reduced soybean seed yield 33% whe.e.no herbicide was applied. A single POST application of glyphosate had the lowest eI. Se.e.al treatments improved early-season weed control and reduced early-season weed density and biomass compared to glyphosate and had similar eI values. In this study, the.e.was no be.e.it to yield or partial profit by including a PRe herbicide for weed manage.e.t;howe.e., the inclusion of multiple modes-of-action in a herbicide program may reduce the se.e.tion for herbicide-resistant weeds.

关键词： Density environmental Impact Injury Profit Analysis Tillage Yield Weed Control

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

制作1000mb面预报图的直接法

南京大学学报(自然科学版) 1959年第1期 103-109页

作者：徐尔灏

(一) 現时制作1000mb面預报图的方法(指图解法数值預报,下同)都是間接法,卽必須先計算其他变量的变化,而后方能計算1000mb面的变高。大多数方法是先計算500mb面的变高,如estoque(1956,1957a,1957b),Reed(1957,1958),以及作者提出的“第... 详细信息

(一) 現时制作1000mb面預报图的方法(指图解法数值預报,下同)都是間接法,卽必須先計算其他变量的变化,而后方能計算1000mb面的变高。大多数方法是先計算500mb面的变高,如estoque(1956,1957a,1957b),Reed(1957,1958),以及作者提出的“第二法”(1958b);亦有先計算500/1000mb厚度变化者,如作者所提出的“第一法”(1958a)。这种間接法的缺点有二:(1)制作1000mb預报图的手續及时間均因此大为增加。(2)制作预报图的误差是累积的,在間接法里制作其他变量預报图的誤差,最后必然使制作1000mb面预报图的誤差有不必要的增加,有时可能很大。如Reed(1957)

关键词：预报图直接法附图数值预报模式正压模式

STUDY ON GReY FOReCASTING MODeL OF COPPeR eXTRACTION RATe WITh BIOLeAChING OF PRIMARY SULFIDe ORe

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(english Letters) 2007年第2期20卷 117-128页

作者： A.X. Wu Y. Xi B.h. Yang X.S. Chen h.C. Jiang Civil ＆ engineering School University of Science and Technology Beijing Beijing 100083 China China Nonferrous engineering and Re.e.rch Institute Beijing 100038 China School of Resources ＆ Safety Central South University Changsha 410083 China

A model GM （grey model）（1,1） for forecasting the rate of copper extraction during the bioleaching of primary sulphide ore was established on the basis of the mathematical theory and the modeling process of grey system theory. It was used for forecasting the rate of copper extraction from the primary sulfide ore during a laboratory microbial column leaching experiment. The precision of the forecasted results we.e.examined and modified via ＂posterior variance.e.amination＂. The results show that the forecasted values coincide with the.e.perimental values. GM （1,1） model has high forecast accuracy; and it is suitable for simulation control and prediction analysis of the original data series of the processes that have grey characteristics, such as mining, metallurgical and mineral processing, etc. The leaching rate of such copper sulphide ore is low. The grey forecasting result indicates that the rate of copper extraction is approximately 20% e.e. after leaching for six months.

关键词： primary copper sulfide ore bioleaching extraction rate grey theory forecasting model

在线全文

学校读者我要写书评

暂无评论

使用浮选柱生产高品位铁矿石精矿

国外选矿快报 1998年第20期 15-18页

作者： h.e.怀斯劳齐尔钱鞠梅加拿大柯明科工程服务有限公司选矿技术部

高品位矿石储量的衰竭和市场要求提高产品质量的压力的不断增加,迫使生产厂家重新审查其工艺流程和评价可替代现有的或补充性的选矿方法,要求更高质量的球团矿则意味着SiO_2含量需从2.0%降至1.0%以下。反浮选柱(硅从铁精矿中浮选出去)... 详细信息

高品位矿石储量的衰竭和市场要求提高产品质量的压力的不断增加,迫使生产厂家重新审查其工艺流程和评价可替代现有的或补充性的选矿方法,要求更高质量的球团矿则意味着SiO_2含量需从2.0%降至1.0%以下。反浮选柱(硅从铁精矿中浮选出去)已被证明是降低精矿中硅含量的一种经济有效的方法。实验室和工业研究均证明使用浮选柱带来了可观的冶金和经济效益。卓越的选矿指标和低投资以及低运转费用使柱浮选机在选矿厂被广泛应用,在进行铁矿石选矿时,其冲洗泡沫的能力被证明可以获得低含硅量,同时可以把铁的损失减小到最低程度。新近的成本比较显示。

关键词：铁矿石精矿品位浮选样铁矿浮游选矿

控制土壤发育过程的科学原理——(全苏土壤微生物学问题会议总结)

在线全文

学校读者我要写书评

暂无评论

土壤学报 1953年第3期 191-194页

作者： e.h.米苏斯金陈廷伟

微生物在土壤形成中起着巨大的作用。微生物在土壤过程中的意义经常在В.В.杜库查耶夫,П.А.考斯托契夫及B.P.威廉姆斯的土壤学经典著作中着重指出。B.P.威廉姆斯特别深堪地发展了关于生物在土壤中的作用的概念、土壤形成过程的趋向... 详细信息

微生物在土壤形成中起着巨大的作用。微生物在土壤过程中的意义经常在В.В.杜库查耶夫,П.А.考斯托契夫及B.P.威廉姆斯的土壤学经典著作中着重指出。B.P.威廉姆斯特别深堪地发展了关于生物在土壤中的作用的概念、土壤形成过程的趋向是与居住在一定的植物社会中的某种微生物类群的活动相联系的。草田轮栽的理论即为 B.P.威廉姆斯广泛地考虑到微生物学因素的作用而制订成的。Т.Д.李森科院士对 B.P.威廉姆斯的观点加以很高的评价。他指出,为腐朽

关键词：土壤微生物土壤形成植物根部雕子米丘林草田共生性威廉姆斯