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土壤砷的吸持研究  [PDF]
农业环境科学学报 , 1996,
Abstract: 本文对土壤砷的吸附行为进行了综述,包括吸附反应、影响因素,且对砷的吸附研究进行了展显。
Continuously adjusting the reflectivity of fiber loop mirror using a polarization controller
利用偏振控制器连续调节光纤环镜的反射率

Feng Su-Juan,Shang Liang,Mao Qing-He,
冯素娟
,尚亮,毛庆和

物理学报 , 2007,
Abstract: Reflection characteristics of a novel fiber loop mirror (FLM), which is formed by inserting a fiber polarization controller (PC) into the loop, are investigated. Based on the equivalent optical-path analysis, a theoretical model for the FLM is presented. The reflection characteristics of the FLM are then simulated in detail with the model. Our simulation results show that, by varying the PC working conditions, i.e. the fast axis orientation or the intensity of the birefringence induced by the PC, the refrectivity of the FLM may be continuously tuned between 0 and 1. The spectral characteristic of reflectivity of the FLM is wide and flattened, limited only by the operating bandwidth of the optical fiber coupler used. Moreover, the reflection characteristics of the FLM are further investigated experimentally. The experimental results also show that by varying the working conditions of the PC, the reflectivity of the FLM may actually be continuously adjusted between its maximum and minimum values,which were measured to be 93% and 2%, respectively. The experimentally determined dependence of the fast axis orientation and intensity of the birefringence induced by the PC on the inclination angle of the three rigid discs with respect to the level of the PC verified the results of theoretical simulations.
??埃?邦之??原料  [PDF]
地质论评 , 1937,
Abstract: 原文??业杂?(TheMiningJournal)此文则?自??时报三十三卷第七期之转?,著者为俄人马克弗先生,为苏联科学研究员。此篇?文适发表於第十七次万国地???於莫斯科??之前。文中首述苏联近十年间地??查工作之?步,次列各?重要???量之新估计及?年?业发展之情形。其立?不免稍具宣传色彩,然苏联政府方面之?精图治及?事?业者之锐意经营,亦可概见一般矣。我国天赋?藏,?不若苏联之丰富,而亟待调查开发之处正多。反?我国近年之地?工作及???展情形,?亦呈蓬勃之象,然较之苏联则瞠乎其后矣。人为之不藏,读斯文而益信。特??要旨,以(?)?者。
国审小麦新品种郑麦101的选育  [PDF]
何盛莲,吴政卿,雷振生,杨会民,杨攀,晁岳恩,李巍,周正富,刘加平,徐福新
河南农业科学 , 2014,
Abstract: 郑麦101是以高产、稳产、多抗、广适材料郑麦9023为亲本,经过多年定向选择和鉴定培育而成的高产、稳产、抗病小麦新品种。区试2a平均产量6958.5kg/hm2,比对照品种偃展4110增产3.82%;生产试验平均产量6984kg/hm2,比对照品种偃展4110增产5.17%。2a区试品质分析结果表明,湿面筋含量分别为35.1%、34.0%,吸水率分别为56.6%、55.2%,稳定时间分别为8.0min、6.1min。品质指标接近优质强筋标准,综合抗病性较好,抗条锈病,对赤霉病有一定耐性。适宜于黄淮冬麦区南片的河南省大部、安徽省北部、江苏省北部、陕西省关中地区高中水肥地块中晚茬种植。
国审小麦新品种新麦21的选育  [PDF]
朱红彩,范永胜,赵娟,王士坤,马朝阳
河南农业科学 , 2011,
Abstract: 新麦21系新乡市农业科学院以偃展1号为母本,新麦9号为父本杂交,经后代系谱法连续选择培育而成的小麦新品种。新麦21属弱春偏冬性、高产、稳产、抗病、抗寒、中早熟品种。系谱分析表明,新麦21综合了双亲的优良性状,含有英国抗源和波兰、意大利小麦血缘,具有抗逆性强、综合性状优良及广泛的适应性等特点,适宜河南中北部、安徽省北部、江苏省北部、陕西关中、山东菏泽地区中高肥水、中晚茬地种植。2007-2008年国家黄淮南片春水组区试结果表明,该品种2a平均产量8319kg/hm2,比对照偃展4110增产4.4%。品质达优质中筋标准,蛋白质14.95%~15.04%,容重795~800g/L,湿面筋34.7%~35.7%,稳定时间2.3min。
1999-2000年度全[国区域地质调查总结  [PDF]
刘凤山,庄育勋
地质通报 , 2001,
Abstract: 1999―2000年度全国区域地质调查(以下简称区调)工作重点部署在青藏高原、西南地区、西北地区、长江、黄河流域及东南沿海地区。围绕青藏高原、东北地区中比例尺区调空白区、重大地质问题分布区、重要经济区和重要成矿区带安排近120个项目。1999年和2000年新立区调项目进展顺利,基本完成野外踏勘和年度填图任务,“九五”续作区调项目到2000年全部结束。1999―2000年度全国区域地质调查取得重要进展,主要为(1)青藏高原1∶25万区调新发现了大量古生物化石和古人类活动遗迹、蛇绿混杂岩带和榴辉岩带及储量可达大中型铜、锑、金矿线索,…
国审小麦新品种漯迈18的选育  [PDF]
张锋,薛国典,赵永涛,张中州,张运栋,张宏生
河南农业科学 , 2013,
Abstract: 漯麦18是漯河市农业科学院2003年以创新抗源4336为母本、周麦16为父本,通过有性杂交,采用系谱法选育的小麦新品种。2012年通过国家农作物新品种审定。该品种高产稳产、抗逆广适、综合农艺性状优良。参加国家黄淮南片区域(生产)试验,3年度47点次试验平均产量7825.5kg/hm2,较对照偃展4110增产4.66%,增产点率达89.4%,3个年度产量均居参试春性品种第1位。适宜在黄淮南片河南、安徽、江苏、陕西等省高、中水肥中晚茬麦区种植。
国鉴淀粉型优质甘薯新品种洛薯10号的选育  [PDF]
王自力,刘忠玲,秦家范,张正伟,王玲
河南农业科学 , 2013,
Abstract: 洛薯10号是洛阳市农林科学院、洛阳金谷王种业有限公司以豫薯10号为母本,洛89-4-6为父本杂交选育而成的淀粉型、优质、高产、多抗甘薯新品种,2011年3月通过国家甘薯品种鉴定委员会品种鉴定。该品种的突出特点是:(1)淀粉含量高。河南省区试、国家区试、国家生产试验汇总:该品种淀粉含量分别是22.7%、21.3%、20.9%,分别比对照徐薯18高3.5、3.5、4.3个百分点。(2)淀粉产量高。河南省区试、国家区试、国家生产试验汇总:该品种淀粉产量分别是5806.5、5772.0、6057.0kg/hm2,分别比对照增产17.4%(P≤5%)、10.3%(P≤1%)、27.7%(P≤1%)。(3)综合抗病性好。该品种高抗蔓割病,中抗根腐病、茎线虫病、黑斑病。(4)优质。淀粉含量高;薯干品质好。此外,单株结薯少,薯块整齐,薯皮光滑,更有利于机械收获和淀粉加工过程的清洗。
晋西黄土区退耕还林20年后典型林地的持水能力  [PDF]
王高敏,杨宗儒,查同刚,张志强,吕志远,张晓霞,王红艳,朱嘉磊
北京林业大学学报 , 2015, DOI: 10.13332/j.1000-1522.20140367
Abstract: 为探究晋西黄土区退耕20年后典型林地间持水能力的差异,选取山西省吉县蔡家川流域退耕20年的次生林和油松人工林、刺槐人工林、油松×刺槐人工混交林4种典型林分为研究对象,同时以耕地作为对照,通过外业调查和室内测定,比较分析了该地区退耕林分间林地(枯落物层和土壤层)的最大持水量和有效持水量。结果表明:1)次生林枯落物层的最大持水量和有效持水量为201.20和154.32t/hm2,分别是人工林的1.35~2.14倍和1.33~2.06倍,人工林之间表现为油松×刺槐人工混交林>刺槐人工林>油松人工林;2)退耕林地土壤层的最大和有效持水量分别介于5102~5563t/hm2和1007~1251t/m2之间,均显著高于耕地的4695和812t/hm2;典型退耕林地间土壤有效持水量表现为次生林>油松×刺槐人工混交林>油松人工林>刺槐人工林,最大持水量为次生林>油松×刺槐人工混交林>刺槐人工林>油松人工林;3)与退耕引起土壤非毛管孔隙度增加相一致,林地的最大持水量和有效持水量较耕地分别增加了10.7%~22.8%和32.9%~73.1%,表明退耕对林地持水能力的影响在有效持水量方面更突出;4)退耕林分间林地持水能力表现为次生林>油松×刺槐人工混交林>刺槐人工林>油松人工林。林地最大持水量和有效持水量显著高于耕地,这主要源于土壤性质改善引起的土壤层持水能力增强,同时枯落物层的持水功能也发挥了一定作用。总之,退耕20年后林地持水能力显著增强,不同林分间次生林持水能力较好,表明次生林宜作为该地区退耕后植被恢复的主要参考。
Adjusting Phenotypes by Noise Control  [PDF]
Kyung H. Kim ,Herbert M. Sauro
PLOS Computational Biology , 2012, DOI: 10.1371/journal.pcbi.1002344
Abstract: Genetically identical cells can show phenotypic variability. This is often caused by stochastic events that originate from randomness in biochemical processes involving in gene expression and other extrinsic cellular processes. From an engineering perspective, there have been efforts focused on theory and experiments to control noise levels by perturbing and replacing gene network components. However, systematic methods for noise control are lacking mainly due to the intractable mathematical structure of noise propagation through reaction networks. Here, we provide a numerical analysis method by quantifying the parametric sensitivity of noise characteristics at the level of the linear noise approximation. Our analysis is readily applicable to various types of noise control and to different types of system; for example, we can orthogonally control the mean and noise levels and can control system dynamics such as noisy oscillations. As an illustration we applied our method to HIV and yeast gene expression systems and metabolic networks. The oscillatory signal control was applied to p53 oscillations from DNA damage. Furthermore, we showed that the efficiency of orthogonal control can be enhanced by applying extrinsic noise and feedback. Our noise control analysis can be applied to any stochastic model belonging to continuous time Markovian systems such as biological and chemical reaction systems, and even computer and social networks. We anticipate the proposed analysis to be a useful tool for designing and controlling synthetic gene networks.
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