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To explore the quality evaluation indicators of walnut and pecan varieties cultured in Yunnan, the contents of 12 nutritional indicators which included in mineral elements, protein, crude fat, and vitamin C of 27 walnut varieties were determined. 12 indicators were comprehensively explored by correlation analysis, principal component analysis and cluster analysis to reveal variation and comprehensive quality of walnut resources in Yunnan Province. Results showed that the variation of the content of 12 indicators was relatively rich, the variation coefficient ranged from 5% to 83%, among which the variation coefficient of vitamin C was the largest and the variation coefficient of crude fat was the smallest. The order of the average contents of 9 mineral elements was K>P>Mg>Ca>Mn>Na>Fe>Zn>Cu. The average contents of protein, fat and vitamin C were 15.62%, 68.63% and 4.66 mg/100 g, respectively. As demonstrated by the results of correlation analysis on 12 indicators, there was a significant positive correlation between protein and P, Fe, Mg, Ca, and Cu. The principal component analysis was used to comprehensively evaluate, showed that the comprehensive quality of walnut varieties 'Xiangcha' 'Yongping' 'Wanshu' and 'Xiaoyuanguo' were the best and the pecan variety 'Kaduo' was the better. The clustering analysis results showed that it can be divided into two major categories, namely the group rich in mineral elements and the group with high fat content. Subsequently, by combining with cluster analysis, K, Fe, Mg, Ca, Cu, protein and fat were determined as the critical indicators to evaluate the quality of walnut and pecan varieties cultured in Yunnan. Pecan varieties were suitable for extracting oil, and 22 main walnut varieties were suitable for direct consumption or the development of functional beverages rich in mineral elements and protein. The study clarified the critical indicators for evaluating the quality of Yunnan walnut and explored its quality characteristics, providing a scientific classification method, and laying a theoretical basis for the construction of the Yunnan walnut quality evaluation system.

Based on the seismic, logging, drilling and other data, the distribution, structural types and mound-shoal hydrocarbon accumulation characteristics of platform margins of the Sinian Dengying Formation in the Deyang—Anyue Rift and its periphery were analyzed. Four types of platform margins are developed in the Dengying Formation, i.e., single-stage fault-controlled platform margin, multi-stage fault-controlled platform margin, gentle slope platform margin, and overlapping platform margin. In the Gaoshiti West—Weiyuan East area, single-stage fault controlled platform margins are developed in the Deng 2 Member, which trend in nearly NEE direction and are shielded by faults and mudstones, forming fault-controlled—lithologic traps. In the Lezhi—Penglai area, independent and multi-stage fault controlled platform margins are developed in the Deng 2 Member, which trend in NE direction and are controlled by synsedimentary faults; the mound-shoal complexes are aggraded and built on the hanging walls of the faults, and they are shielded by tight intertidal belts and the Lower Cambrian source rocks in multiple directions, forming fault-controlled—lithologic and other composite traps. In the Weiyuan—Ziyang area, gentle slope platform margins are developed in the Deng 2 Member, which trend in NW direction; the mound-shoal complexes are mostly thin interbeds as continuous bands and shielded by tight intertidal belts in the updip direction, forming lithologic traps. In the Gaoshiti—Moxi—Yanting area, overlapping platform margins are developed in the Deng 2 and Deng 4 members; the mound-shoal complexes are aggraded and overlaid to create platform margin buildup with a huge thickness and sealed by tight intertidal belts and the Lower Cambrian mudstones in the updip direction, forming large-scale lithologic traps on the north slope of the Central Sichuan Paleouplift. To summarize, the mound-shoal complexes on the platform margins in the Dengying Formation in the Penglai—Zhongjiang area, Moxi North—Yanting area and Weiyuan—Ziyang area are large in scale, with estimated resources of 1.58×1012 m3, and they will be the key targets for the future exploration of the Dengying Formation in the Sichuan Basin.

Objective To understand the current situation of blood components distribution in domestic prefecture-level blood stations through analyzing the components distribution data of 24 prefecture-level blood stations in China. Methods The data of components distribution of 24 blood stations from 2017 to 2020 as well as the data of blood deployment of 24 blood stations from 2019 to 2020 were collected and analyzed. Results From 2017 to 2020, positive annual growth in red blood cells, plasma and cryoprecipitate was observed in 22, 19 and 15 out of the 24 blood stations, and the annual growth median rate of above three components was 5.24%, 3.80% and 3.25%, respectively. Among the 24 prefecture-level blood stations, 23 carried out the preparation of cryoprecipitate. Conclusion The distribution of red blood cells, cryoprecipitate and plasma in prefecture-level blood stations is increasing year by year. However, there is a overstock of plasma, and most blood stations need blood employment.

Most of the clinical non-surgical methods for the correction of mild kyphosis are to wear kyphosis orthosis, to apply a forward force perpendicular to the spine to the kyphosis, which is generated by the shoulder belt of the orthosis acting on the shoulder. The research on the relationship between orthopedic force and orthopedic angle has not been reported yet, and the relationship between them is of great significance for the design and optimization of orthopedics. In this paper, the method of photography was used to record the kinematic data of the mark points of the cervical vertebra and the thoracic vertebrae in the process of kyphosis orthopedic; the orthopedic pull force perpendicular to the spine along the sagittal direction was provided and recorded by Instron 5544; J image processing software was used to conduct non-linear fitting analysis on the collected image sequence and quantify the corresponding relationship between the effective orthopedic force and the orthopedic angle of kyphosis, and finally a general formula was established for calculating the orthopedic angle and corresponding orthopedic force by taking into account the factors of gender, height, body mass index, upper body length/height, outer shoulder width, sitting height, and sitting shoulder height/sitting height. The results show that the relationship between the orthopedic force and orthopedic angle can be expressed as a cubic function, and the regression coefficient R2 is greater than 0.99; the P value of the fitting regression equation, which takes into account the data of individual factors such as height and weight, is less than 0.05, and the significance of the fitting equation is good; and the general formula of the fitting orthopedic can be applied to the initial calculation of required shape correction force according to height, weight, and other dimensions combined with the orthopedic degree.

Total knee arthroplasty is an effective method for treating knee diseases, but there is no unified view on the advantages and disadvantages of fixed-axis and mobile-axis knee prostheses. In the past, there have been comparative verifications of the two prostheses, but most of which are static simulations. In this paper, a finite element model of a healthy knee joint was built; then a knee joint containing the above two prostheses was established; finally, by dynamically simulating the knee flexion motion, the contact stress and contact area of the tibia-femoral joint were calculated. The results show that for the fixed and mobile axis artificial knee joints, in the range of 0° to 90° knee flexion angle, the contact area shifts from the front of the tibial liner to the rear, and the contact stress of the tibiofemoral joint continues to increase, reaching maximum at 90°. With respect to the fixed shafts, the contact pressure of the tibiofemoral joint between the moving shafts is smaller, and the contact area is larger. As the knee bending angle deepens, the contact stress on the polyethylene pads of the two prostheses gradually increases, and the contact area gradually decreases. No significant difference exists between the two prostheses in the contact stress, but there is a significant difference in the contact area of the two prostheses. The results suggest that under the same contact stress, the larger the contact area is, the less stress concentration is likely to happen, that is, the prosthesis is not prone to wear. This can extend the service life of the knee joint. Therefore, the mobile axis knee prosthesis is better than the fixed axis knee joint prosthesis. This study may provide a valuable reference for the selection of prosthesis transplantation types in clinic.

The old Sinian carbonate reservoir in the Leshan-Longnüsi paleohigh was taken as a research object to study the process of gas accumulation in the Sinian reservoir through analysis of gas reservoir characteristics, gas composition, gas reservoir types, accumulation condition and evolution. The results show that the reservoir lithology and type are almost the same in the six gas pools discovered in the Leshan-Longnüsi paleohigh. All the gas reservoirs are characterized by high temperature, ordinary pressure, and intense heterogeneity. The gas reservoir type in different layers and the gas compositions and carbon isotopes in different locations vary obviously. The gas of Sinian Dengying Formation, originated from oil cracking, is mixed gas mainly from source rocks of Sinian Dengying Formation as well as Cambrian Qiongzhusi Formation. The source and reservoir condition, their combination and fluid transporting conditions are favorable, which can determine the gas accumulation and preservation in Dengying Formation. The Sinian gas reservoirs are believed to have been accumulated by the following processes: paleo-oil accumulation, paleo-oil cracking, and gas reservoir adjustment and finalization. There are three processes of gas accumulation in the reservoir, which are influenced by the formation of paleohigh and differential structural evolution in different positions. Key words: Sichuan Basin, Leshan-Longnüsi paleohigh, Sinian System, Dengying Formation, natural gas, accumulation condition, accumulation process

DOI：10.3969/j.issn.1672-6731.2011.02.003