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1.
醋酸酯淀粉     
《技术与市场》2007,(6):19-19
本项目主要是应用化学方法,将精制马铃薯淀粉进行改性,从而生产出抗凝性、透明度及其它使用性能均好于原淀粉的醋酸酯淀粉。本生产工艺设计包括以下几方面内容:产品的小试研究,产品的化工设备设计,车间平面布置设计,管路布置设计,给排水设计,辅助设施设计,化验室设计,工程概算。  相似文献   

2.
《北京园林》2005,21(4):F0003-F0003
北京市园林古建设计研究院是经建设部批准的“风景园林”甲级设计单位,并具有建筑工程乙级资质,初创于1953年,进入八十年代后,业务范围不断扩大,承担了首都各主要干道,广场,立交桥,大型居住区的绿化设计和公园及风景的规划,园林建筑设计,宾馆饭店的庭院设计,还承担了一些大型公建,高档住宅,别墅,培训中心的建筑和环境设计,具有园林,建筑的综合设计和理论研究能力,近年还在国外设计了多项中国古典式园林,受到了广泛的好评。  相似文献   

3.
《林业建设》2010,(4):F0002-F0002,F0003
各省、自治区、直辖市林业厅(局),内蒙古、吉林、龙江、大兴安岭森工(林业)集团公司,新疆生产建设兵团林业局,国家林业局直属勘察设计、规划院:为贯彻落实科学发展观,进一步促进全国林业工程勘察设计技术创新,鼓励林业勘察设计单位设计人员创作出高水平、高质量的勘察设计项目,经专家评审,我局决定授予“中国广西珠江流域治理再造林项目设计”等8个项目局级优秀勘察设计一等奖,授予“世界银行贷款河南省林业持续发展项目造林总体设计”等16个项目局级优秀勘察设计二等奖,  相似文献   

4.
基于PDA的造林作业设计系统   总被引:3,自引:0,他引:3  
PDA具有便携性、移动性及实时通讯等特点,特别是移动GIS技术逐步成熟,近几年PDA在森林资源调查中得到了广泛应用,但在造林作业设计方面应用尚不系统和深入。为此,本文在分析PDA的特点和造林作业设计业务流程基础上,设计实现了基于PDA的造林作业设计系统,以便提高造林作业设计过程中外业数据采集的精度和效率,增强调查人员的野外设计与决策能力,为内业统计分析提供可靠的数据源,并最终形成造林作业设计成果。  相似文献   

5.
从中小型住宅小区的绿化设计入手,探讨了小区绿化主景与周边环境的关系、区域环境功能分区的设计和绿化设计风格,提出了中小型住宅小区绿化设计要以观赏性和实用性并列为导向,绿化设计要融入人们的情感,使小区绿化设计更具有人性化。  相似文献   

6.
《北京园林》2006,22(2):I0004-I0004
北京市园林古建设计研究院是经建设部批准的“风景园林”甲级设计单位,并具有建筑工程乙级资质,初创于1953年,进入八十年代后,业务范围不断扩大,承担了首都各主要干道,广场、立交桥、大型居住区的绿化设计和公园及风景区的规划、园林建筑设计、宾馆饭店的庭院设计、还承担了一些大型公建、高档住宅、别墅、培训中心的建筑和环境设计、具有园林、建筑的综合设计和理论研究能力,近年还在国外设计了多项中国古典式园林,受到了广泛的好评。  相似文献   

7.
园林景观生态设计   总被引:16,自引:0,他引:16  
在城市环境日益恶化的今天,园林景观生态设计问题越来越受到人们的重视。在分析了当前存在的概念不清、缺乏理论基础及设计原则等问题的基础上,从常规设计方法出发,比较生态设计与常规设计的不同,对目前条件下生态设计的实质、可行性和设计方法做出了归纳总结,并对今后的发展方向做出展望。  相似文献   

8.
干旱荒山造林勘察设计中的几个测算问题罗世华(甘肃省林业勘察设计研究院730020)近几年来,我们在干旱造林和灌溉造林设计中,从树种选择、密度设计、到抚育管理设计,注意到把立地水分平衡问题作为突出问题考虑,并在水肥充实的地方,注意考虑林冠下的碳平衡值,...  相似文献   

9.
铧式犁犁体曲面设计的现状与研究   总被引:5,自引:0,他引:5  
通过对犁体曲面设计现状的分析,根据铧式犁特定的作业要求,结合现代设计方法的特点,研究并提出了一种用于犁体曲面设计的方法——Pro/E设计方法。该方法以部分解析法得出的参数为基础,利用Pro/E自身设计的强大功能,可以较好地表现犁体曲面的三维结构图,大大缩短了产品的开发周期,降低了产品的设计成本。  相似文献   

10.
《技术与市场》2007,(6):38-38
唯美作品,必为精品。精品的创建,在乎设计理念的先进性,设计细节的完美性,设计手法的艺术性。  相似文献   

11.
本文记述了中国松叶蜂昆虫两新种,马尾松吉松叶蜂和油松吉松叶蜂。文中附有形态特征图4幅。  相似文献   

12.
调查研究江西省中北部6个毛竹林(Ⅲ度竹)的胸径、全株杆鲜重、全株枝叶鲜重、杆长、全杆节数、枝下节数、枝盘数、枝下高、叶长和叶宽、叶片长宽比、胸径处竹壁厚度、竹腔径、壁腔比、竹材含水率等表型特征。运用SAS8.1软件进行多元线性回归分析和偏相关分析,研究表明:全株杆鲜重、全株枝叶鲜重和胸径处竹壁厚呈现随经度变化的地理模式,其它表型特征随经度的变化不明显;所调查的表型特征均没有表现随纬度和海拔的变化而变化的地理变异模式。  相似文献   

13.
Chemical study and medical application of saponins as anti-cancer agents   总被引:1,自引:0,他引:1  
Saponins are a group of naturally occurring plant glycosides, characterized by their strong foam-forming properties in aqueous solution. The presence of saponins has been reported in more than 100 families of plants out of which at least 150 kinds of natural saponins have been found to possess significant anti-cancer properties. There are more than 11 distinguished classes of saponins including dammaranes, tirucallanes, lupanes, hopanes, oleananes, taraxasteranes, ursanes, cycloartanes, lanostanes, cucurbitanes and steroids. Due to the great variability of their structures, saponins always display anti-tumorigenic effects through varieties of antitumor pathways. In addition, there are a large amount of saponins that still either remain to be trapped or studied in details by the medicinal chemists. This article reviews many such structures and their related chemistry along with the recent advances in understanding mechanism of action and structure–function relationships of saponins at the molecular and cellular levels. These aglycones have been described and their classification and distribution have been listed in the review. Some special saponins with strong antitumor effects have also been exhibited. Ginsenosides, belonging to dammaranes, have been found beneficial targeted on inhibition of tumor angiogenesis by suppressing its inducer in the endothelial cells of blood vessels, and then on prevention of adhering, invasion, and metastasis of tumor cells. Dioscin, one of the steroidal saponins, and its aglycone diosgenin also have been extensively studied on its antitumor effect by cell cycle arrest and apoptosis. Other important molecules discussed include oleanane saponins such as avicins, platycodons, saikosaponins, and soysaponins along with tubeimosides.  相似文献   

14.
一个世纪来黑龙江省森林景观动态研究   总被引:1,自引:0,他引:1  
With the help of GIS tool of ARC/INFO,ARCVIEW and FRAGSTATS,the map of forest resource distribution of Heilongjiang Province was analyzed in 1896,1949 and 1981.Using total area,mean patch size,patch density,coefficient of patch size variation,mean patch fractal dimension and mean shape index,we studied the change of forest landscape pattem and the change of each patch types in this region.As a result,the total area of forest landscape and mean patch size decreased sharply,the quantity and density of patches increased,the juxtaposition of patches weakened,the shape of patch tended to become regular,and the border of patch simplified.All these showed that the forest landscape of this area tended to fragment gradually,and the fragment of Korean pine forest is the severest.the diversity of whole forest landscape and the eveness of landscape types distribution reduced gradually.Human impact,instead of climate change and forest community succession,is the most important reason for such dramatic chages.  相似文献   

15.
根据秃杉有关的研究文献,对秃杉物种的确立,天然林的生物多样性、空间分布、动态和更新演替等种群特征,原生地保护与迁地保护,引种地气候和立地的适应性,速生性,抗寒、耐高温干旱、耐萌、抗风和抗病虫害能力等抗逆性,种源的遗传多样性,种源地理变异和生态适应性,种子、苗期及林木生长的变异,不同年龄林木生长性状的相关性,优良种源选择和种源区划等的研究进行了综合评述。  相似文献   

16.
论人本主义管理理念   总被引:2,自引:0,他引:2  
组织最重要的资源是人,要实现组织目标就要有合理的管理,人本主义管理理念就是在管理过程中以人为本,以尊重人格,突出柔性管理,关心员工发展的双赢策略,确立员工的主人翁地位和注重员工培训为人本主义管理的思想内容。  相似文献   

17.
陆兆华  吴钢等 《林业研究》2002,13(4):319-322
本文通过对中国林业的现状及存在的一系列生态、环境、经济和社会问题的分析讨论,重点强调了森林及整个林业在我国社会和经济发展中的重要作用。同时,作者提出可持续发展,特别是林业的可持续发展是解决我国当前生态环境和经济社会问题的关键和必由之路。并从生态学、经济学和社会学的角度,论证和阐述了林业可持续发展的目标、准则,以及我国林业的可持续发展战略。参11。  相似文献   

18.
本文通过对哈尔滨工程大学绿化现状的分析,在规划中,提出了"一园、二区、三空间、四廊道、六组团"整体绿化景观,使设计更科学、布局更完整、结构更清晰。在新校区规划为体现学校从"发现—研究—收获"的这一发展历程。提出"新校区、新建筑、新景观"的思想,设计出简洁、现代、生态且充满创造精神的新景观。结合不同的区域特点分别提出了详细设计方案,展现出知识不断求索创新、积累升华的过程。  相似文献   

19.
Decomposition of Scots pine needle litter originating from five stands treated with different amounts of nitrogen fertilizer was measured over a 4‐year period in a mature Scots pine forest. The litter types, which differed in initial concentrations of nitrogen, phosphorus, potassium, and sulfur, but not in gross organic composition, were studied with respect to mass loss, ingrowth of total fungal mycelium, and net release of nutrients. During the first year of decomposition, rates of mass loss and ingrowth of fungal mycelium were highest in the nutrient‐rich litter. Phosphorus concentration was found to be the main factor affecting mass‐loss rate, and the rate of fungal ingrowth was positively correlated with initial nitrogen concentration. After this initial period, decomposition rates decreased, and after 4 years, accumulated mass loss and amounts of fungal mycelium were similar in all five litter types. These findings may be due, in part, to a lower rate of lignin decomposition in nitrogen‐enriched litter. Of the elements, potassium and magnesium were most rapidly lost from the litter, and their release was most pronounced during the first year. Calcium release was proportional to the loss in organic matter. Initially, the release of nitrogen and phosphorus was positively related to their concentrations in litter, however, during later stages of decomposition the differences among litter types levelled out. There was a tendency for concentrations of all elements, except nitrogen, in the different litters to approach similar levels as decomposition proceeded. Thus, after 4 years the nutrient composition of the various litter types was very similar, except for higher nitrogen concentrations in the originally most nutrient‐rich litters. The importance of the results in terms of substrate quality in fertilized as well as in non‐fertilized forests is discussed.  相似文献   

20.
竹业引领人类生活更美好   总被引:4,自引:4,他引:0  
文章介绍了竹材在建筑、家具、交通、日用品等领域的应用现状,分析了竹材在性能、成本、资源量及环保等方面具有的多种优势,以及木材、塑料、钢材、陶瓷应用局限性和劣势,提出了竹木并举、以竹代塑、竹钢协同、竹瓷互补潜在的创新应用方向。在当前化石能源日益枯竭、环境压力越来越大的情况下,发展竹产业、应用竹产品是一项改变人类生活、促进绿色发展的重要举措,是健康生活、生态人居、绿色发展的正确方向。  相似文献   

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