Feature extraction is the key link in the process of image description, classification and analysis. Based on cognitive theory and perceptual experience, given a texture image, no matter how the texture image is transformed, rotated, scaled, affine, or even distorted, the image obtained should be the same texture from the perspective of human observation. Correspondingly, the extracted texture features should also be unchanged. Therefore, invariant texture feature extraction is an indispensable part in practical application and theoretical analysis. From the perspective of texture feature extraction, this paper studies the feature extraction and application of texture image by using the characteristics of PCNN. The icmnn model is improved by adding the connection intensity factor to couple the image structure information and weaken the gray information, so as to extract the image structure information and make the scrambling evaluation result consistent with the visual evaluation. Because the improved algorithm extracts the structure information of the image indirectly, in order to further extract the structure information directly, the image is processed by bit decomposition method, and the direct structure information is extracted by icmnn.
Lupus nephritis is an autoimmune disease with multiple system injuries of unknown etiology.Due to its characteristic of multiple system damage,there are significant individual differences in clinical manifestations and pathological types.Western medicine may cause certain side effects while treating this disease.Traditional Chinese medicine has unique advan-tages such as significant therapeutic effect,high safety,and low recurrence rate,among which traditional Chinese medicine preparations play an important role in clinical practice due to their simple and cost-effective characteristics.In recent years,clinical and experimental studies on lupus nephritis in traditional Chinese medicine have been increasing,In this paper,by consult-ing the latest literature at home and abroad,the progress in the treatment of lupus nephritis with traditional Chinese medicine are introduced,which will provide a reference for future research work.
In this paper,taking agritainment in Qingdao city as the research object,based on the data of 414 agritainment in Qingdao city captured by POI,the spatial distribution character-istics and influencing factors of agritainment in Qingdao city were analyzed by using the nearest neighbor index,coefficient of variation,kernel density analysis,cold and hot spot analysis and buffer analysis.The results indicate that as followings.(1)Agritainment in Qingdao city pres-ents a spatial agglomeration distribution trend,forming a high-density area and two sub high-density areas.The degree of agglomeration in the southern and northern regions is greater than that in the central region.(2)Landform,economic level,tourism resources,transportation,and market are the main factors that affect the spatial distribution of agritainment in Qingdao city.The research conclusion can provide a certain reference for the development of agritainment and tourism in Qingdao city.
The flower organs of Lilium'Eyeliner'were used as explants for tissue culture,and the hormone concentration ratio was determined by orthogonal design.The regenerated plants were obtained through tissue culture.The results showed that the induction of different parts of the flower organs of Lilium'Eyeliner'was different.The ovary was the most easily induced,fol-lowed by the filament,and the anther was the most difficult to induce.The optimal culture me-dium for different stages varies.During the process of inducing callus,the suitable culture me-dium for filaments is MS+2,4-D 0.5 mg/L+NAA 0.1 mg/L+6-BA 1.0 mg/L,and the suitable culture medium for ovaries is MS+NAA 0.1 mg/L+6-BA 1.0 mg/L.In bud induction,the opti-mal medium for both explants is MS+NAA 0.1 mg/L+6-BA 1.0 mg/L.Cultivating strong seed-lings in MS medium without adding hormones can not only induce rooting but also achieve the goal of strong seedlings.The ratio of transplanting medium of test tube seedlings of Lilium'Eyeliner'is peat∶sand∶vermiculite∶Perlite=10∶2∶1∶1,and the survival rate is as high as 98％.
Ecological space plays the role of maintaining regional Balance of nature,and its scope identification and assessment is the key to achieve regional sustainable development.Tak-ing Qingdao city as an example,a system of ecosystem service functions and ecological sensitiv-ity rating indicators was constructed.GIS and RS technologies were used to quantitatively iden-tify the ecological space in Qingdao city,and the identification results were combined with land use conditions for analysis.The conclusion is as followings.(1)The ecological space area of Qingdao city is 10 989.22 km2,accounting for 97.31％of the total land area of Qingdao city.The core,auxiliary,and transitional ecological space areas are 735.17 km2,3 069.44 km2,and 7 184.61 km2,respectively,accounting for 6.51％,27.18％,and 63.62％of the research area.(2)According to statistics on the types of ecological land use,about 90％of construction land is within the scope of ecological space.This study can provide reference for regional land planning and ecological space optimization layout,and provide experience for relevant research.
