Shearer self-adaptive memory cutting     

XU Zhi-peng  WANG Zhong-bin  MI Jin-peng 《保鲜与加工》2011,(4):134-140

Considering the previous technology of memory cutting cannot adapt to the complicated geological condition in China, the technology of shearer self-adaptive memory cutting based on fuzzy control theory, the shearer positioning system and fuzzy control system of self-adaptive cutting are designed. These systems can get the message of shearer’s position and attitude at any point, trace the memorial cutting path automatically, judge whether the shearer cuts rocks based on fuzzy control theory and find the optimal scheme when it works. The authors make the experiment of path tracing in laboratory and the experiment of self-adaptive adjust in Xi'an Coal Mining Machinery Co., Ltd. All the experimental results show that this technology not only can realize the shearer memory cutting but also can discriminate the abnormal state of shearer cutting rocks, then adjust the drawing speed and drum height self-adaptively. This technology can satisfy the control requirements under the complicated geological condition.  相似文献   

小型秸秆切碎机的设计   总被引：1，自引：1，他引：0  

邓春岩  陈芳  邓晨  崔丽娜  栾莹  吴建华  吴亮亮 《农机化研究》2011,33(7)

随着畜牧业的发展,实行农牧结合,秸秆养畜,形成节粮型的畜牧业结构是符合我国国情的畜牧业发展的有效途径。我国农村具有丰富的秸秆资源,秸秆切割的加工机械也得到广泛的应用。这些机械能扩大饲料来源,改善秸秆品质,避免粗饲料茎秆部分不被采食而浪费。但现有的秸秆切碎机械,尚缺乏结构简单、使用方便、价格低廉、适合于广大农民个体使用的机型。针对这一现实,设计了小型的秸秆切碎机,完成了总体结构及其主要部件的设计。  相似文献   

Can stumps tell what people want: Pattern and preference of informal wood extraction in an urban forest of Nairobi, Kenya     

Takuya Furukawa  Kazue Fujiwara  Samuel K. Kiboi  Patrick B. Chalo Mutiso 《Biological conservation》2011,144(12):3047-3054

Detailed patterns and preferences of informal wood extraction were investigated in an urban forest used by slum inhabitants of Nairobi, Kenya, as such information determines the sustainability of resource use. Instead of asking the people what they had secretly cut, a survey was conducted of the stumps and trees left in the forest to (i) evaluate how accessibility and patrolling affected spatial patterns of resource use, and to (ii) estimate a broad spectrum of species and species-specific size preferences. Both probability and size of cutting increased with better accessibility (represented by distance from the slum), and stump size exceeded that of living stem size around 1.7 km from the slum, which suggested magnified impact of tree cutting near the slum. Patrolling (represented by distance from ranger stations) had little effect in reducing the probability of cutting but was effective in reducing cut size. With the use of random effect models, a broad species preference spectrum (including less abundant and non-preferred species) was estimated, which indicated trends in vegetation change. Smaller stems were preferred for most species presumably used for domestic fuelwood, but major exploitation of large Brachylaena huillensis stems traded in the woodcarving industry was also revealed. Such detailed information on informal wood use can help forest managers to understand threats to the forests as well as the needs of local communities. This is a first step to redefining ‘acceptable’ resource use by the local community for their increased role and responsibility in sustainable forest management, especially when conventional controls of informal activities (i.e. exclusion and penalty) are not functioning well.  相似文献   

梨矮化砧木云南榅桲硬枝扦插繁殖试验     

徐凌飞  刘亚杰  李慧  贾东峰 《北方园艺》2011,(17):54-55

以云南榅桲为材料,研究了不同浓度ABT①号生根粉(0、20、40、60、80、100、120mg/L)、吲哚丁酸(0、0.25、0.5、1.0 mg/L)、覆膜和不同部位插条处理对云南榅桲插条成活率的影响.结果表明:ABT①号生根粉(20～120 mg/L)、吲哚丁酸(0.25～1.0 mg/L)和覆盖地膜处理提高了云南榅桲插条成活率,云南榅桲上部插条扦插成活率高于下部插条;在覆膜条件下,100mg/L的ABT①号生根粉和0.5 mg/L的吲哚丁酸处理插条成活率分别为95.5％和100％.  相似文献   

不同沙土比例对温室番茄侧枝扦插的影响     

于翠玲 《北方园艺》2011,(21):54-55

以温室中生长的“赛欧”番茄侧枝为试材,研究了沙土不同混合比例对侧枝扦插生长的影响,探讨促进番茄侧枝扦插的最佳沙土比例.结果表明:50％沙的处理效果较好,叶片数、株高、根系数、茎粗、根冠比和成活率等各项指标都好于其它处理.  相似文献   

植物生长调节剂对番茄扦插繁殖的影响     

阮先乐  张杰  陈龙 《北方园艺》2011,(24):43-44

以“粉达”番茄的侧枝为试材,研究0、20、40、60、80、100、120 mg/L的吲哚乙酸、吲哚丁酸、萘乙酸和生根粉对番茄扦插繁殖的影响.结果表明:吲哚乙酸、吲哚丁酸、萘乙酸和生根粉的浓度分别为100、60、80、60 mg/L时,有利于番茄侧枝不定根的形成及成活率的提高.  相似文献   

Production and growth analysis of plants from leaf cuttings,and from tissue cultures of disks from mature leaves and young axenic leaves of African Violet (Saintpaulia ionantha Wendl.)     

A.C. Cassells  A. Plunkett 《Scientia Horticulturae》1984,23(4):361-369

Details of common media and procedures are given for the regeneration of plants from disks of mature leaves and young axenic leaves of African Violet.Growth analysis of the progeny plant populations show differences in plant diameter, leaf number, leaf area and petiole length between tissue culture progenies and those derived from leaf cuttings. Both the tissue culture progeny poulations had similar character means. Intra-population variation was high for all three progeny populations. Leaf shape, number of flowering plants, number of peduncles and number of flowers and flower buds per plant did not vary among the three progeny populations, but intrapopulation variation was high in the latter characteristic.  相似文献   

湖桑硬枝电热线温床扦插研究   总被引：1，自引：0，他引：1  

沈增学  王承欣 《蚕业科学》1992,18(4):220-226

试验表明,采用电热线温床扦插,在2月下旬剪取插穗,穗长18厘米,直径1.1厘米以上。插前穗基用150ppmNHM激素浸渍20—24小时。扦插密度每平方米2000株,插床温度27℃,气温12℃,每天喷水一次,(1.75公斤/米~2)。本地区扦插适期为3月上旬,插穗发根率达95％左右,插后1个月移栽,成活率60—70％。每扦插一株所花材料和电费为0.013元。  相似文献   

切花月季的温室生产     

杨云亭  郑冰 《山西林业科技》2003,(4):30-32

选用2年生切花月季红色系品种萨蔓莎作试材，探讨其温室栽培中所留主枝多少与切花产量、质量的关系。试验结果表明：选留4条主枝的植株比选留6条、8条主枝的植株，切花产量高、质量好。选留主枝数量与各生长阶段所需时间长短无关。  相似文献   

兰花繁殖技术   总被引：1，自引：0，他引：1  

刘武  章玉平 《安徽农学通报》2008,14(11):127-129

本文介绍了中国兰的分株繁殖、石斛兰假鳞茎培养法、兰花种子无菌播种繁殖和蝴蝶兰与中国兰组织培养技术。  相似文献