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引进“雅发”祖代褐壳蛋鸡生长阶段的效果
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作者 吴宪章 王积海 《养鸡机械与技术》 北大核心 1993年第4期17-19,共3页
关键词 鸡蛋 褐壳蛋 生长 雅发
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雅发蛋种鸡在我市饲养适应性研究
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作者 葛建东 杨凌 +2 位作者 王林 陈志凌 周兵 《上海畜牧兽医通讯》 北大核心 1998年第4期16-17,共2页
关键词 雅发蛋种鸡 引种 饲养适应性 江苏 盐城市
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晚清兴安城总管衙门兴废简析
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作者 苏静 《哈尔滨学院学报》 2017年第8期114-117,共4页
19世纪五十年代末叶,俄国强行侵占黑龙江以北中国领土后,失去江北大片猎场的雅发罕鄂伦春人生活愈加拮据、苦不堪言。清政府在光绪八年(1882)对其收编管束,建立兴安城总管衙门,光绪二十年(1894)便谕令裁撤,虽没有达到清政府预期的效果,... 19世纪五十年代末叶,俄国强行侵占黑龙江以北中国领土后,失去江北大片猎场的雅发罕鄂伦春人生活愈加拮据、苦不堪言。清政府在光绪八年(1882)对其收编管束,建立兴安城总管衙门,光绪二十年(1894)便谕令裁撤,虽没有达到清政府预期的效果,但在雅发罕鄂伦春人的历史上留下了浓墨重彩的一笔。 展开更多
关键词 兴安城 雅发罕鄂伦春人 贡貂
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精品叠出三十载,倾情奉献爱乐者
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作者 一言 《现代音响技术》 2003年第6期79-81,共3页
关键词 皇冠公司 音响 雅发系列 亚米加系列 系列 世纪系列 展历程
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Changes in Agricultural Biodiversity: Implications for Sustainable Livelihood in the Himalaya 被引量:7
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作者 K.G.Saxena R.K.Maikhuri K.S.Rao 《Journal of Mountain Science》 SCIE CSCD 2005年第1期23-31,共9页
Himalayan mountain system is distinguished globally for a rich biodiversity and for its role in regulating the climate of the South Asia. Traditional crop-livestock mixed farming in the Himalaya is highly dependent on... Himalayan mountain system is distinguished globally for a rich biodiversity and for its role in regulating the climate of the South Asia. Traditional crop-livestock mixed farming in the Himalaya is highly dependent on forests for fodder and manure prepared from forest leaf litter and livestock excreta. Apart from sustaining farm production, forests provide a variety of other tangible and intangible benefits, which are critical for sustainable livelihood of not only 115 million mountain people, but also many more people living in the adjoining plains. Extension of agricultural land- use coupled with replacement of traditional staple food crops by cash crops and of multipurpose agroforestry trees by fruit trees are widespread changes. Cultivation of Fagopyrum esculentum, Fagopyrum tataricum, Panicum miliaceum, Setaria italica and Pisum arvense has been almost abandoned. Increasing stress on cash crops is driven by a socio-cultural change from subsistence to market economy facilitated by improvement in accessibility andsupplyofstaplefoodgrainsatsubsidizedpriceby the government. Farmers have gained substantial economic benefits from cash crops. However, loss of agrobiodiversity implies more risks to local livelihood in the events of downfall in market price/demand of cashcrops,terminationofsupplyofstaplefoodgrains at subsidized price, pest outbreaks in a cash crop dominated homogeneous landscape and abnormal climate years. Indigenous innovations enabling improvement in farm economy by conserving and/enhancing agrobiodiversity do exist, but are highly localized. The changes in agrobiodiversity are such that soil loss and run-off from the croplands have dramatically increased together with increase in local pressure on forests. As farm productivity is maintained with forest-based inputs, continued depletion of forest resources will result in poor economic returns from agriculture to local people, apart from loss of global benefits from Himalayan forests. Interventions including improvement in traditionalmanureandmanagementofon-farm trees, participatorydevelopmentofagroforestryindegraded forestlandsandpoliciesfavoringeconomicbenefitsto local people from non-timber forest products could reduce the risks of decline in agricultural biodiversity and associated threats to livelihoods and Himalayan ecosystems. 展开更多
关键词 Land use/cover change food security cash crops traditional agricultural practices forest management
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Systems of Agriculture Farming in the Uttranchal Himalaya, India 被引量:1
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作者 Vishwambhar Prasad Sati 《Journal of Mountain Science》 SCIE CSCD 2005年第1期76-85,共10页
Agricultural practices are the main stay of the people of Uttranchal. Out of the total population, more than 75% people are engaged either with the main occupation of agriculture or its allied practices, dominated by ... Agricultural practices are the main stay of the people of Uttranchal. Out of the total population, more than 75% people are engaged either with the main occupation of agriculture or its allied practices, dominated by traditional subsistence cereal farming. Among them, the main crops are rice, wheat, millet, barley, all types of pulses, all types of oilseeds and almost all types of fruits. The crops, vegetables and fruits of all varieties are grown in the different climatic zones such as tropical, temperate, and cold because, the region is characterized by the different altitudinal zones elevated from 200 m to more than 8000m. As a result, different climates are found from hot tropical to sub temperate and chilly cold. Pulses varieties are grown extensively. Among vegetables, potato, onion, carrot, all types of green leaf vegetables, brinzal, pumpkin, ladyfinger, pea, gram, radish, ginger, garlic, etc, are grown widely. All fruit varieties are grown in the different altitudinal zones. The main fruits are orange, malta (a big size of orange), elephant citrus, lemon and all other types of citrus, apple, stone fruits including peach and pears, many kinds of nuts, and the fruits which are grown in the low lying areas. In spite of feasible climatic conditions, agricultural dominant society, and availability of all types of crops, the production and productivity of these crops are very low, even they are unable to meet the grain-need of the people in Uttaranchal. Agricultural crops are grown almost in all the altitudinal zones — from the low-lying areas, which are called ‘Gangarh’, to the highly elevated region, where the legendary term is given as ‘Danda’. The growing seasons vary according to the heights. The present paper aims to discuss the agricultural practices including cropping season, cropping pattern, land use, production of crops and ecological aspect of agricultural system in this Himalayan state and suggest some measures for developing farming system, which could lead the sustainability, in terms of meeting the food grain needs of the people on the one hand and restoring the ecological balance on the other. 展开更多
关键词 Mountain farming subsistence cereal farming watershed Alpine meadow valley region highly elevated region sustainability ecological region
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Regolith thickness modeling using a GIS approach for landslide distribution analysis, NW Himalayas 被引量:4
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作者 Muhammad BASHARAT Masood QASIM +3 位作者 Muhammad SHAFIQUE Nasir HAMEED Muhammad Tayyib RIAZ Muhammad Rustam KHAN 《Journal of Mountain Science》 SCIE CSCD 2018年第11期2466-2479,共14页
Regolith thickness is considered as a contributing factor for the occurrence of landslides.Although, mostly it is ignored because of complex nature and as it requires more time and resources for investigation. This st... Regolith thickness is considered as a contributing factor for the occurrence of landslides.Although, mostly it is ignored because of complex nature and as it requires more time and resources for investigation. This study aimed to appraise the role of regolith thickness on landslide distribution in the Muzaffarabad and surrounding areas, NW Himalayas.For this purpose regolith thickness samples were evenly collected from all the lithological units at representative sites within different slope and elevation classes in the field. Topographic attributes(slope, aspect, drainage, Topographic Wetness Index,elevation and curvature) were derived from the Digital Elevation Model(DEM)(12.5 m resolution).Arc GIS Model Builder was used to develop the regolith thickness model. Stepwise regression technique was used to explore the spatial variation of regolith thickness using topographic attributes and lithological units. The derived model explains about 88% regolith thickness variation. The model was validated and shows good agreement(70%) between observed and predicted values. Subsequently, the derived regolith model was used to understand the relationship between regolith thickness and landslide distribution. The analysis shows that most of the landslides were located within 1-5 m regolith thickness. However, landslide concentration is highest within 5-10 m regolith thickness, which shows that regolith thickness played a significant role for the occurrence of landslide in the studied area. 展开更多
关键词 REGOLITH GIS Regression LANDSLIDES HIMALAYAS
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Evaluation of Reanalysis Products with in situ GPS Sounding Observations in the Eastern Himalayas 被引量:2
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作者 ZHU Jin-Huan MA Shu-Po +2 位作者 ZOU Han ZHOU Li-Bo LI Peng 《Atmospheric and Oceanic Science Letters》 CSCD 2014年第1期17-22,共6页
Previous studies have shown that reanalysis products contain large uncertainties in the Tibetan Plateau(TP),and the biases are location dependent.Therefore,these products must be evaluated with in situ observations pr... Previous studies have shown that reanalysis products contain large uncertainties in the Tibetan Plateau(TP),and the biases are location dependent.Therefore,these products must be evaluated with in situ observations prior to their applications.In this study,the authors compare the results of several reanalysis projects with independent sounding observations recorded in the Yarlung Tsangpo River valley in the Eastern Himalayas in June 2010.These reanalysis projects include Climate Forecast System Reanalysis(CFSR),Interim European Centre for Medium Range Weather Forecasts Reanalysis(ERA- Interim),Japanese 25-year Reanalysis(JRA-25),Modern Era Retrospective Analysis for Research and Applications(MERRA),National Center for Environmental Prediction and the Department of Energy Reanalysis 2(NCEP-R2),and NCEP Final Analysis(FNL).Statistical quantities such as average,mean bias(MB),root-mean-square difference(RMSD),and correlation coefficient(R) of temperature,specific humidity,u-wind,and v-wind between 100 hPa and 650 hPa were calculated.The authors determined that the performance of each product differed with variables at different levels.The average profiles of the variables were captured by the reanalysis products,with large biases appearing at lower levels.ERA-Interim and NCEP-R2 showed the best and worst performances,respectively,for all variables.This study suggests that users should select appropriate reanalysis products according to their specific purposes for TP research. 展开更多
关键词 reanalysis products GPS sounding Eastern Himalayas
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Sustainability Assessment and Ranking of Run of the River(RoR) Hydropower Projects Using Analytical Hierarchy Process(AHP):A Study from Western Himalayan Region of India 被引量:2
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作者 Deepak KUMAR Surjit Singh KATOCH 《Journal of Mountain Science》 SCIE CSCD 2015年第5期1315-1333,共19页
In the present scenario,tapping the unutilised hydropower potential is one of the highest priorities in developing countries of the world.Special emphasis is being imparted to run of the river(RoR)mode of power genera... In the present scenario,tapping the unutilised hydropower potential is one of the highest priorities in developing countries of the world.Special emphasis is being imparted to run of the river(RoR)mode of power generation.However,the governments are now facing the dilemma whether to promote small hydropower projects(SHPs) or encourage large hydropower projects(LHPs).RoR large hydropower projects result into large scale cutting of mountains for constructing tunnels and access roads,generation of huge quantity of muck and large scale impact on flora and fauna due to diversion of rivers/streams.On the other hand,though SHPs are claimed to be greener and more sustainable by a section of researchers and energy planners but,they will be required to be set up in large number to generate equivalent amount of electricity.The aim of this study is to rank the most sustainable installed capacity range of RoR hydropower projects.To achieve this aim,the study proposes the use of quite popular multi-criteria decision making(MCDM)method of Operation Research named Analytical Hierarchy Process.A case study has been presented from Himachal Pradesh,a hydro rich state located in the western Himalayan region.As per sustainability assessment carried out in this study,hydropower projects in the capacity range 1 to 5 MW have been ranked to be the most sustainable. 展开更多
关键词 Sustainability Run of the river Hydropower project Analytical Hierarchy Process HIMALAYA
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Internal Variable Formulations of Static and Dynamic Elastic-Plastic Problems Using Liapunov Functions: Algorithmic Aspects
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作者 Modify Andrew Elton Kaunda 《Journal of Mechanics Engineering and Automation》 2011年第2期147-162,共16页
The fundamental problem of an elastic-plastic body subjected to incremental loading is reviewed using a compact internal variable approach based on work carried out at the University of Cape Town in which a quadratic ... The fundamental problem of an elastic-plastic body subjected to incremental loading is reviewed using a compact internal variable approach based on work carried out at the University of Cape Town in which a quadratic functional was developed for the free energy using Taylor series. Now the departure from that approach is the focus on developing the Liapunov function for the nonlinear differential equations of motion. Static and dynamic equations of motion are derived and shown to meet the requirements of the Liapunov function. As a consequence, time integration parameters that are used in the discrete formulations are easily obtained based on the same requirements. The resulting generalized Newton-Raphson scheme is stable in the sense of Liapunov's direct method. 展开更多
关键词 Elastic-plastic problems intemal variables forward-backward difference scheme Liapunov function generalizedNewton-Raphson scheme.
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Effect of Lead Toxicity on Germination and Enzymatic Activity of Durum Wheat Triticum durum Desf.
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作者 Immene Nedjah Mokhtar Boudelaa +2 位作者 Mounia Benkaddour Soraya Slimani Ali Ladjama 《Journal of Agricultural Science and Technology(A)》 2013年第6期436-442,共7页
The aim of this work is to identify the effect of lead on germinal parameters and the antioxidant enzyme activities (lipase, peroxidase and catalase) in durum wheat Triticum durum Desf. cv (waha, vitron and gta) e... The aim of this work is to identify the effect of lead on germinal parameters and the antioxidant enzyme activities (lipase, peroxidase and catalase) in durum wheat Triticum durum Desf. cv (waha, vitron and gta) exposed to the concentrations of 0, 0.15, 0.25 and 0.3 g/L of Pb (NO3)2 during germination process. The obtained results showed that lead reduced the germination, root and aerial biomass. The concentration of 0.3 g/L inhibited completely the germination of the three varieties. It also slowed lipase activity, the degradation of lipids of the seed's reserves and disrupted the metabolism of peroxidase and catalase. Concerning the behavior of the three varieties studied, it appears that the Vitron is the best predisposed variety to stand against lead stress by its strong antioxidant defense system. 展开更多
关键词 GERMINATION durum wheat PEROXIDASE CATALASE lipase.
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Constraining the timing of the India-Asia continental collision by the sedimentary record 被引量:37
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作者 HU XiuMian WANG JianGang +2 位作者 AN Wei Eduardo GARZANTI LI Juan 《Science China Earth Sciences》 SCIE EI CAS CSCD 2017年第4期603-625,共23页
Placing precise constraints on the timing of the India-Asia continental collision is essential to understand the successive geological and geomorphological evolution of the orogenic belt as well as the uplift mechanis... Placing precise constraints on the timing of the India-Asia continental collision is essential to understand the successive geological and geomorphological evolution of the orogenic belt as well as the uplift mechanism of the Tibetan Plateau and their effects on climate,environment and life.Based on the extensive study of the sedimentary record on both sides of the Yarlung-Zangbo suture zone in Tibet,we review here the present state of knowledge on the timing of collision onset,discuss its possible diachroneity along strike,and reconstruct the early structural and topographic evolution of the Himalayan collided range.We define continent-continent collision as the moment when the oceanic crust is completely consumed at one point where the two continental margins come into contact.We use two methods to constrain the timing of collision onset:(1) dating the provenance change from Indian to Asian recorded by deep-water turbidites near the suture zone,and(2) dating the age of unconformities on both sides of the suture zone.The first method allowed us to constrain precisely collision onset as middle Palaeocene(59±l Ma).Marine sedimentation persisted in the collisional zone for another 20-25 Ma locally in southern Tibet,and molassic-type deposition in the Indian foreland basin did not begin until another 10-15 Ma later.Available sedimentary evidence failed to firmly document any significant diachroneity of collision onset from the central Himalaya to the western Himalaya and Pakistan so far.Based on the Cenozoic stratigraphic record of the Tibetan Himalaya,four distinct stages can be identified in the early evolution of the Himalayan orogen:(1) middle Palaeocene-early Eocene earliest Eohimalayan stage(from 59 to 52 Ma):collision onset and filling of the deep-water trough along the suture zone while carbonate platform sedimentation persisted on the inner Indian margin;(2) early-middle Eocene early Eohimalayan stage(from 52 to 41 or 35 Ma):filling of intervening seaways and cessation of marine sedimentation;(3) late Eocene-Oligocene late Eohimalayan stage(from 41 to 25 Ma):huge gap in the sedimentary record both in the collision zone and in the Indian foreland;and(4) late Oligocene-early Miocene early Neohimalayan stage(from 26 to 17 Ma):rapid Himalayan growth and onset of molasse-type sedimentation in the Indian foreland basin. 展开更多
关键词 India-Asia continental collision Timing of collision onset Himalayan orogeny Tibet Himalaya Sedimentary record
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Frequency-dependent rupture process,stress change,and seismogenic mechanism of the 25 April 2015 Nepal Gorkha M_w 7.8 earthquake 被引量:8
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作者 YIN JiuXun YAO HuaJian +3 位作者 YANG HongFeng LIU Jing QIN WeiZe ZHANG HaiJiang 《Science China Earth Sciences》 SCIE EI CAS CSCD 2017年第4期796-808,共13页
On 25 April 2015,an M_w 7.8 earthquake occurred on the Main Himalaya Thrust fault with a dip angle of^7° about77 km northwest of Kathmandu,Nepal.This Nepal Gorkha event is the largest one on the Himalayan thrust ... On 25 April 2015,an M_w 7.8 earthquake occurred on the Main Himalaya Thrust fault with a dip angle of^7° about77 km northwest of Kathmandu,Nepal.This Nepal Gorkha event is the largest one on the Himalayan thrust belt since 1950.Here we use the compressive sensing method in the frequency domain to track the seismic radiation and rupture process of this event using teleseismic P waves recorded by array stations in North America.We also compute the distribution of static shear stress changes on the fault plane from a coseismic slip model.Our results indicate a dominant east-southeastward unilateral rupture process from the epicenter with an average rupture speed of ~3 km s^(-1).Coseismic radiation of this earthquake shows clear frequency-dependent features.The lower frequency(0.05-0.3 Hz) radiation mainly originates from large coseismic slip regions with negative coseismic shear stress changes.In comparison,higher frequency(0.3-0.6 Hz) radiation appears to be from the down-dip part around the margin of large slip areas,which has been loaded and presents positive coseismic shear stress changes.We propose an asperity model to interpret this Nepal earthquake sequence and compare the frequency-dependent coseismic radiation with that in subduction zones.Such frequency-dependent radiation indicates the depth-varying frictional properties on the plate interface of the Nepal section in the main Himalaya thrust system,similar to previous findings in oceanic subduction zones.Our findings provide further evidence of the spatial correlation between changes of static stress status on the fault plane and the observed frequency-dependent coseismic radiation during large earthquakes.Our results show that the frequency-dependent coseismic radiation is not only found for megathrust earthquakes in the oceanic subduction environment,but also holds true for thrust events in the continental collision zone. 展开更多
关键词 Pg wave Tomography Crust Velocity Anisotropy Volcano
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