摘要：In The Cherry orchard,there are mainly three kinds of time *** upper class in the play,such as Lyubov has a nostalgia time *** the second place,the character such as Firs,a nobody,a servant in the play,trapped in the ***,the rising class such as Lopakhin,Dunyasha and,Varya,keeping a watchful eye on the time *** sets various metaphors in the *** papers discuss either the upper class’s view on the time or the rising class’s while there is little attention on the *** nobody’s senselessness of the time flow leads to the unobserved living conditions and sad *** essay focuses on a nobody,Firs’s sense of time in The Cherry orchard,trying to show how a man would disappear in time with no name when he gives up his“self”.

摘要：The orchards usually have rough terrain,dense tree canopy and *** is hard to use GNSS for autonomous navigation in orchard due to signal occlusion,multipath effect,and radio frequency *** achieve autonomous navigation in orchard,a visual navigation method based on multiple images at different shooting angles is proposed in this paper.A dynamic image capturing device is designed for camera installation and multiple images can be shot at different ***,the obtained orchard images are classified into sky and soil detection *** image is transformed to HSV space and initially segmented into sky,canopy and soil regions by median filtering and morphological ***,the sky and soil regions are extracted by the maximum connected region algorithm,and the region edges are detected and filtered by the Canny ***,the navigation line in the current frame is extracted by fitting the region coordinate *** the dynamic weighted filtering algorithm is used to extract the navigation line for the soil and sky detection stage,respectively,and the navigation line for the sky detection stage is mirrored to the soil ***,the Kalman filter algorithm is used to fuse and extract the final navigation *** test results on 200 images show that the accuracy of visual navigation path fitting is 95.5%,and single frame image processing costs 60 ms,which meets the real-time and robustness requirements of *** visual navigation experiments in Camellia oleifera orchard show that when the driving speed is 0.6 m/s,the maximum tracking offset of visual navigation in weed-free and weedy environments is 0.14 m and 0.24 m,respectively,and the RMSE is 30 mm and 55 mm,respectively.

摘要：Taking the planning and designing of tourism orchard in Yanyang Farm of Taicang City as the study case,this paper aimed to shape this orchard into a natural,unique,cultural,participatory and sustainable modern tourism picking orchard,with the function of popularizing knowledge of flowers and fruits and displaying Hi-Tech *** on the introduction of superior new varieties of fruit trees,enhanced fruit production function,a sound basis for tourism picking orchard system will be *** designing plan divided the whole orchard into 4 parts,which are "Spring Garden","Summer Garden","Autumn Garden" and "Winter Garden".With landscape design of fruit trees as the key part,this paper made preliminary research on landscape design of this orchard.① "Spring Garden",which aimed to show early spring in the orchard of agricultural landscape,covering an area of 0.83 hm2,the main tree species were Malus spectabilis(Ait.) Borkh.,Cerasus pseudocerasus,Armeniaca vulgaris and Vatica mangachapoi.② "Autumn Garden",which aimed to show fruitful harvest scene,covering an area of 1.67 hm2,the main tree species were Punica granatum,Crataegus pinnatifida and Diospyros kaki Linn.f.③ "Summer Garden",which aimed to provide tourism attractions for students on summer vacation,covering an area of 1.73 hm2,the main tree species were peach,plum and Prunus simonii Carr..④"Winter Garden",which aimed to provide one activity area for tourists in winter orchard,covering an area of 0.96 hm2,the main tree species were Citrus reticulate Banco and Eriobotrya *** tourist orchard tried to achieve harmony unity of orchard fruit production,landscape tourism,recreational services and so on,thus providing useful references to the designing of tourist orchard in leisure agricultural farm.