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王广宇 《绿色中国(A版)》2006,(23):51-53
河流、羊群,僧人尼玛磕着等身长头逆流而上;河流的源头,就是神居住的地方。雪山、晚霞,藏族阿妈指着太阳落下的方向;往西行,就能回家。2005年10月,太阳牵着我的手,找到了河流的源头,我的家…… 相似文献
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启文河是广西田林县县城工业、农业生产及居民生活用水主要水源,河流源头森林资源保护的好坏程度,将对全县社会、经济的发展起着举足轻重的作用。田林县2002年以来实施了启文河源头林业生态建设,为进一步了解河流源头森林资源的保护情况,笔者对区域内的农户进行了调研,现提出几点粗浅看法,以供探讨。 相似文献
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人类生活和生产第一需要,包括水源。这水必须是清洁的,没有污染。我在著名的瓯江发源地——浙江的庆元和龙泉两个县,看到了浙江四大河流之一的瓯江,她清澈之极的水流,令我欣喜异常。在我看来,浙江最美的河流,可能要数富春江了。她那纯净丰沛的蓝蓝的江水,让我每一次从她身旁经过的时候,都感到无限的陶醉。而当我来到瓯江边上,看到她那同样美好的一江碧水,那感觉几乎与富春江一模一样。我没有来得及探访富春江的源头,却在庆元和龙泉看到了瓯江的发源地, 相似文献
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渭源县是黄河的最大支流渭河的发源地,生态地位十分重要。为此,国务院办公厅《关于进一步支持甘肃经济社会发展的若干意见》明确提出:要“实施渭河、泾河、洮河等中小河流综合治理”,“积极建设黄河中上游生态修复以及渭河、泾河流域水土保持综合治理等重点生态项目”,“加强渭河源头生态保护与建设”。抓住这一难得的政策机遇,切实加快渭源县林业建设步伐,是防治水土流失、促进生态修复的重要手段,是推动当地经济社会可持续发展的基础工程。 相似文献
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青山迤迄树当被,座座城镇绿中生。这是记者5月10日至14日随“三湘环保世纪行”到邵阳采访时见到的情景。然而,令人遗憾的是,满目青山下,呈现在记者眼前的江河却是浊水横流。为何青山换不来绿水? 邵阳市地处湘西南边陲,境内群山起伏,溪河密布,是洞庭湖四大水系中源头分布面积最大的地区。据统计,全市有5公里以上的大小河流633条,汇经资、沉、湘各水输入洞庭湖的水量,占洞庭湖源头总径流量的18石%。因此,有专家指出:邵阳生态环境的好坏,输水量的多少,水质的优劣和泥沙含量,影响着邵阳及其下游地区国土安全及人民… 相似文献
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1伊犁河谷次生林概况
1.1地理分布
伊犁河谷次生林伴生于伊犁河流域内,分布在蜿蜒广布的河道中及山间支流两岸。伊犁河是新疆境内最大的一条内陆河流,也是一条重要的国际河流,支流特克斯河是伊犁河的主源。从其源头至出境处,伊犁河全长601公里,共有120多条产水河流,河道及河岸均密布植被。 相似文献
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大数据与中国家居制造业的融合,加速了家居智能制造转型升级的步伐。大数据技术已经渗透到家居制造的各个环节,显著提升了生产效率,引领了企业的核心竞争力,提高了市场预测和分析能力。文中简述家居大数据、大数据分析方法、大数据挖掘技术的基本内涵,对大数据分析方法及大数据技术在家居行业中的研究和应用情况进行了总结,包括大数据与家居智能制造的对接模式、大数据挖掘算法的应用情况;分析了大数据技术引领企业核心竞争力的转变、助力家居产品设计研发、驱动家居产品柔性制造过程、提升家居企业运营过程、促生家居企业的信息化管控平台等方面对家居智能制造的提升和改变情况;结合目前大数据技术在家居智能制造应用研究中存在的问题,从数据存储方式、数据处理方法、数据可视化展示、数字化网络平台搭建等方面进行展望,以期为在家居行业智能制造转型升级过程中拓展大数据技术的发展路径、更加合理和高效地利用大数据提供借鉴与参考。 相似文献
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当前,我国已进入老龄化社会,居家养老模式产生了庞大的老年家居需求。本文在讨论我国人口老龄化趋势和居家养老需求的基础上,论述了绿色家居和智能家居的基本概念,提出了老年家居进行绿色化与智能化设计的要点和原则,以期为家居产业和养老产业快速融合发展提供参考。 相似文献
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定制家具已经成为追求个性化和私密家居环境者的一个方向,但其多变性较强,在工业化生产过程中很难实现“无缝式”衔接,从而导致部分家装业定制家具的设计方案与家具产品之间产生差异。介绍了家装业定制家具的主要特征,论述了计算机集成制造家具的基本模式,具体分析了家装业定制家具设计与计算机集成制造系统中的衔接问题,有针对性地提出优化家具设计与计算机制造系统衔接的三项措施。 相似文献
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The evaluation of species and structural diversity of home gardens strongly depends on the methods used. We distinguish the biosocial and the bionumerical method. The first is widely used and takes data of the whole population of trees of home gardens to calculate diversity. The bionumerical method calculates diversity from data of a fixed number of randomly selected trees. We apply both methods to analyze if structural and species diversity varies with home garden size, a theme of considerable conservation interest, and compare results. We inventoried the tree component of a sample of 61 home gardens from rural areas in Tabasco, Mexico, which we assigned to three size categories: small (≤1,000 m2), medium sized (>1,000 and ≤2,000 m2), and large home gardens (>2,000 m2). Average species richness and Shannon diversity indices determined by the biosocial method were significantly different among home garden size classes. Average species richness determined by the bionumerical method did not differ among size classes. Both methods showed highest total observed and estimated species richness in the large home gardens, which contain many unique species. Both methods showed similar overall species composition among size classes and highest structural diversity in large home gardens. We conclude that it is important for conservation to maintain large home gardens in local mosaics, and that the biosocial and bionumerical methods are complementary. The bionumerical method allows straight comparison of population diversity within and among systems, but lacks attention for rare and unique species. The biosocial method evaluates how much diversity families custody. 相似文献
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P. A. Wojtkowski 《Agroforestry Systems》1993,24(2):215-222
Tropical home gardens are an agroforestry practice found worldwide. From an analytical perspective little is known about this practice. The universality of their complex structure would indicate the existence of common objectives. The objectives and resulting implementation strategies will dictate the form, layout, species composition and management style of each home garden. Understanding the interrelationships between these various elements is one step toward utilising the advantages of home gardens in a range of agroforestry practices. 相似文献
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Kerry M. Borkin Stuart Parsons 《Forest Ecology and Management》2011,262(5):845-852
Individuals’ home ranges are constrained by resource distribution and density, population size, and energetic requirements. Consequently, home ranges and habitat selection may vary between individuals of different sex and reproductive conditions. Whilst home ranges of bats are well-studied in native habitats, they are often not well understood in modified landscapes, particularly exotic plantation forests. Although Chalinolobus tuberculatus (Vespertilionidae, Chiroptera) are present in plantation forests throughout New Zealand their home ranges have only been studied in native forest and forest-agricultural mosaic and no studies of habitat selection that included males had occurred in any habitat type. Therefore, we investigated C. tuberculatus home range and habitat selection within exotic plantation forest. Home range sizes did not differ between bats of different reproductive states. Bats selected home ranges with higher proportions of relatively old forest than was available. Males selected edges with open unplanted areas within their home ranges, which females avoided. We suggest males use these edges, highly profitable foraging areas with early evening peaks in invertebrate abundance, to maintain relatively low energetic demands. Females require longer periods of invertebrate activity to fulfil their needs so select older stands for foraging, where invertebrate activity is higher. These results highlight additional understanding gained when data are not pooled across sexes. Mitigation for harvest operations could include ensuring that areas suitable for foraging and roosting are located within a radius equal to the home range of this bat species. 相似文献
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介绍了智能家居发展史和国内外现状,对智能家居系统构成和电力载波技术进行了分析探讨。对智能家居产品做了简要介绍,并选择已有智能家居系统中操作相对简单、用户较易理解的智能家居系统进行设计,将智能家居产品与原有家居环境融为一体,体现出以人为本的家居环境。 相似文献