Based on the sample surveys of public space characteristics and residents of Shanghai Li-Long,the interrelationships are analyzed between the space forms of Li-Long and residents＇ communication network.The multi-activity regions and the gray spaces of inside buildings and streets can provide for communication physical infrastructures of residents,and the outdoor activities can be promoted expediently.The findings may be used as reference for rebuilding of Li-Long and public space design of new housing cluster.

Large angle fish eye lens are applied in more and more fields.To correct the large-angle fish eye images better,we improve the method that confirms the center and radial of the fisheye images by scanning row by row and column by column,which avoids producing errors when there are many black pixels on the edge of the fish eye images and make the determination of the image center and radial more accurate by threshold judgement which can remove the unreliable edge pixels.Then,we use the algorithm of spherical perspective projection constraint that maps the distorted planar points to the spherical points.After getting the spherical points, these spherical points are mapped to the faces of the cube which circumscribes the sphere.By amplifying the pixels coordinate values of the cube faces properly and using bilinear interpolation on the cube faces,the corrected images are finally achieved.

Root architecture and anatomical structure of maize cultivars determine the efficiency of nitrogen utilization. It is important to study the differences of root architecture and anatomical structure of different low-N tolerant maize cultivars. 'Xianyu 335' (‘XY335’) and 'Huanong 138' (‘HN138’) were used as experimental materials in this research, and the relationship of root distribution, root activity, root anatomical structure and nitrogen uptake in maize were studied under three nitrogen rates. The results showed that the grain yield, biomass and 1000-grain weight of ‘XY335’ were significantly higher than those of ‘HN138’ under three nitrogen rates. ‘XY335’ had higher root biomass after flowering, and the root-to-shoot ratio was signifcantly higher than that of ‘HN138’ under three nitrogen
treatments. The individual total root length, population root length density, root vigor persistence, nitrogen harvest index and nitrogen use effciency of ‘XY135’ were all signifcantly higher than that of ‘HN138’. Under low nitrogen rates （N180 and N0）, the root activity and the ratio of aeration tissue in root cortex to cross-sectional area of ‘XY335’ increased signifcantly, and the root micro-structure was more reasonable, ensured the higher nitrogen absorption, and
then attained higher grain yield than that of ‘HN138’. Those characters of ‘XY135’ can ensure the nitrogen uptake of plant, and obtain higher nitrogen harvest index and nitrogen use effciency. The results could provide theoretical basis for breeding new maize varieties with high yield, low-N tolerance and high nitrogen use effciency.

 An Arabidopsis T-DNA insertion mutant SALK_037453 from the Salk library showed short petioles and defective leaf development. The genetic analysis and PCR detection showed that the phenotype of the Salk_037453 mutant was not linked to the insertion site provided by the website and should be caused by another T-DNA at an unknown insertion site. In order to find this site and identify the genes that cause the rosette leaf aggregation phenotype, TAIL-PCR was used to identify the sites and it was found that the T-DNA located between the two genes, At4G39400 (AtBRI1) and At4G39403 (AtPLS). Furthermore, real-time PCR results showed that transcription level of the both genes had changed due to the inserted T-DNA. This study provides new candidate genes for exploring the process of leaf development and provides new materials for further elucidating the biological functions of AtBRI1 and AtPLS.

The restricting of the agricultural expert system to popularize and apply is easy to carry and simple operation.Aiming at the portable agriculture expert system development,this paper proposed collecting the digital image of crops,varieties,diseases,pests in real-time as the input information for the expert system.In order to reduce the user's text input so as to achieve the purpose of simplify the operation.This paper is based on ARM6410 development board and USB camera.In the Linux operating system,we customize the kernel,achieve the software design process of gathering image data,especially we put forward the effective methods on the single frame image acquisition.Finally,we successfully got the image data and display the image on the target board.

NF-Y-type transcription factors play an important role in regulating plant growth and development and mediating plant resistance to abiotic stress. This study investigated the molecular characteristics, expression pattern in response to drought stress, and biological function in mediating plant drought tolerance of a transcription factor gene TaNF-YA1 belonging to the wheat NF-YA family. TaNF-YA1sequence was highly similar to TmNF-YA9 of Triticum monococcumin. Under drought treatment, the expression of TaNF-YA1 in roots and leaves increased continuously and peaked at 24 h after treatment, which remained stable until 48 h after treatment. In addition, the gene transcripts in roots and leaves decreased gradually when plants were recovered to normal condition after 48 h of drought treatment.Compared with the wild-type(WT) control, the growth vigor of the tobacco lines overexpressing sense TaNFYA1(Sen 1 and Sen 2) was enhanced under drought treatment, showing increasedplant size, fresh and dry weight of root. Moreover, these transgenic lines displayed enhancedability of photosynthetic carbon assimilationactivity of cellular antioxidant enzymes, and increased stomatal closure rate andwater holding capacity in the isolated leaves after drought stress. The expression levels of the antioxidant enzyme genes(NtSOD1.1, NtCAT2.2 and NtPOD4.1)and root development-associated genes(NtPIN1 and NtPIN4) were significantly increased in Sen 1 under drought treatment in comparison with the WT plants. Consistently, the tobacco lines expressing antisense TaNF-YA1(Anti 1 and Anti 2) showed decrease in plant growth, dry matter accumulation, physiological parameters(photosynthetic physiological parameters, cell protective enzyme activity, stomatal closure rate, water holding capacity of leaf) and drought related gene expressions. This study suggested that TaNF-YA1 promotes root development, photosynthetic assimilate production and homeostasis of cellular reactive oxygen species(ROS), and responds to drought stress to regulate the physiological and biochemical processes related to plant drought resistance, contributing to enhancement of the plant drought resistance.