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The effects of different levels of seven granatum powder (SGP) on slaughter performance, meat quality and blood calcium, magnesium and phosphorus ions of broilers were studied. A total of 288 1-day-old healthy AA broilers were randomly divided into four groups: CON group fed with basic diet and experimental group fed with SGP diet with 0.2%, 0.4% and 0.6% levels, with 6 replicates in each group and 12 broilers in each replicate. The experimental period was 42 days. The results showed that: ① compared with CON group, adding 0.4% and 0.6% SGP in the diet can significantly increase the breast muscle rate of AA broilers (P< 0.05), but it has no significant effect on the slaughter rate, semi-clean bore rate, full clean bore rate, leg muscle rate and abdominal fat rate (P>0.05); ② compared with CON group, SGP group can significantly reduce the L* value of breast muscle color index and the b* value of leg muscle color index (P<0.01), and significantly or extremely significantly reduce the b* value of breast muscle color index (P<0.05 or P<0.01). 0.4% and 0.6% SGP can significantly reduce the L* value of leg muscle color index; compared with CON group, different levels of SGP had no significant effect on the a* value of meat color index (P> 0.05). Compared with CON group, the shear force of chest muscle in 0.6% SGP group increased significantly (P<0.05), and the cooking loss of chest muscle in 0.4% SGP group increased significantly (P< 0.05), but the pH45 min, shear force and cooking loss of leg muscle in SGP group did not change significantly (P>0.05); ③ compared with CON group, adding different levels of SGP in the diet had no significant effect on the contents of calcium, magnesium and phosphorus in broiler serum (P>0.05). The results show that dietary 0.4% SGP can effectively increase breast muscle rate and meat color, but has no significant effect on serum calcium, magnesium and phosphorus contents of AA broilers. [ABSTRACT FROM AUTHOR]

顺应国家卫生事业发展新形势,贴近大型综合医院临床康复护理发展新实践,在康复专科护理管理及教育中,搭 建康复专业团队人员构架,建立相应职责体系,确立日常工作定位及任务分工,并以此为基础展开运作,能够使日常康复管理及康 复教育顺利进行。近年来,该院康复科年住院患者600余人次,平均住院时间43 d,日康复患者治疗3 000余人次,患者康复满意 率在90%以上,位居同等科室前列。因此,按照各级卫生部门要求,确立医院医生、护士、康复治疗师执业资质,建立各自专业资 质标准,同时,结合单位实际,加强康复救护团队执业能力、专业素质培养,确立层级教育培训内容,能够保障综合医院康复科工作 高效推进。 [ABSTRACT FROM AUTHOR]

BACKGROUND: How to efficiently and uniformly disperse carbon nanotubes (CNTs) into a tissue-engineered scaffold is crucial to construct an ideal CNTs-Polymer composite scaffold and it is also a hotspot of research in the tissue engineering. OBJECTIVE: To review the advances in the methodology progress of constructing a scaffold for cardiac tissue engineering, which contains uniformly and stably dispersed CNTs. METHODS: The Web of Science Core Collection and PubMed were searched by the first author for related papers about CNTs dispersion in the cardiac tissue engineering published from October 2004 to January 2017. The key words were “carbon nanotubes, dispersion, cardiac tissue engineering” in English. Original research papers were searched, which were screened through titles, abstracts and contents, and then reviewed. RESULTS AND CONCLUSION: CNTs are easy to aggregate because of high surface area, high aspect ratio and rough surface. Thus, it is one of the key points to construct an ideal CNTs-Polymer composite scaffold that whether CNTs could be uniformly and stably dispersed in polymer scaffolds. In the cardiac tissue engineering, covalent or non-covalent surface modification of CNTs significantly enhances the uniformity and stability of CNTs in the polymer scaffolds, which is conducive to construct the uniformly and stably CNTs-dispersed scaffold for cardiac tissue engineering, leading to notable improvement in mechanical and electrical properties of engineered cardiac tissues. [ABSTRACT FROM AUTHOR]

In the aftermath of natural disasters, there are often a large number of casualties that need to be treated, so choosing a suitable location to set up a temporary hospital and planning for the transfer of casualties with different levels of injury to improve their chances of survival is the key to post-disaster emergency response. This paper aims at the problem of casualty transport and emergency medical materials distribution after disasters, a dual objective model of casualty transport and emergency medical materials distribution is constructed to maximize the overall survival probability of the injured and maximize road safety for vehicle driving, taking into account the limited number of casualty transfer vehicles, the impact of the arrival time of emergency medical materials to temporary hospitals on the survival probability of casualties, road conditions in the disaster areas and the capacity limitation of temporary hospitals. A multi-objective particle swarm optimization algorithm is designed to solve the model. Finally, through case analysis and sensitivity analysis of key parameters, the effectiveness of the model is verified, and the relevant conclusions can provide reference for post-disaster emergency management decisions. The results show that when emergency medical materials can not arrive before the casualty is transferred to a temporary hospital, a combination of casualty transfer and emergency medical material distribution increases the probability of survival. [ABSTRACT FROM AUTHOR]

The precise object localization system is a fundamental infrastructure for the safe and effective production in coal mines. Authors analyzed the key problems faced by the localization of mobile objects in coal mines, such as roadway characteristics, excavation equipment, multipath features, multi-site interferences and error accumulations. The mainstream methods of range measurement, including RSSI, TOA/TDOA and AOA/DOA, were summarized. The authors also discussed the common position computation methods and specialized position computation methods based on the particular surroundings of roadway, respectively. The representatives of the former are least square, maximum likelihood, cost function and fingerprint methods, and the distance-constraint method and the joint distance measuring method based on electromagnetic wave and ultrasonic wave are two typical examples of the latter. Then analyzed the optimization methods of localization results, including the identification and suppression of NLOS in coal roadway, the realtime computation of path loss exponent and the optimization techniques assisted by space information. Besides, the authors proposed the development trend of localization framework based on internet of coal things. With the idea that everything is connected with each other, one can work out better distance measuring technologies, position estimating methods and result optimizing algorithms. The paper strived to clarify the technology levels and development venation of the localization of mobile objects in coal mines and analyze the influential factors of localization precision in detailed. [ABSTRACT FROM AUTHOR]

【Objective】 The current paper was conducted to study the relationships between different altitudes and the economic traits of walnut fruit, the degree of variation of main fatty acids, and the degree of variation of main fatty acids in Yunnan’s main walnut variety, Juglans sigillata cv. Yanbipao, so as to reveal the variation characteristics of its fruit shape and nutritional components, determine the best suitable cultivation area for a specific variety and to provide a theoretical basis for further developing applications.【Method】 Taking Yangbipao walnut as the test material, from the altitude of 1500 meters, the fruit was sampled every time the altitude rising by 100 meters, and the economic traits and fatty acid quality indicators of the fruit were measured and analyzed. The economic forest research method was used to determine the economic properties of nuts, main fatty acid content. Correlation analysis, stepwise regression analysis and determination degree analysis were carried out to reveal the relationship between each index and altitude change. 【Result】 At an altitude of 1500 meters, the thickest shell was 1.105 mm; At an altitude of 1700 meters, the smallest seed weight, kernel weight, and three-diameter mean were 9.298 g, 4.961 g, and 32.240 mm respectively; At an altitude of 1900 meters, the lowest rate of kernel release was 50.6%; At an altitude of 2300 meters, the highest values were found for seed weight, kernel weight, kernel release rate, and three-diameter mean, while the thinnest shell was 1.015 mm. The altitude had a negative correlation with shell thickness, a significant positive correlation with kernel release rate, longitudinal diameter, and transverse diameter, a positive correlation with seed weight, kernel weight, horizontal diameter, and three-diameter mean, and a positive correlation with oleic acid, peanut acid, and peanut oleic acid, as well as a negative correlation with stearic acid, linoleic acid, and linolenic acid. The altitude had the greatest direct effect on peanut oleic acid, and the indirect effect on linoleic acid was greater than the direct effect. The altitude mainly affected the variation in the properties of linoleic acid, peanut acid, and peanut oleic acid. 【Conclusion】 In the study area, altitude has a comprehensive impact on the economic traits and main fatty acid content of Yangbipao walnut kernel fruits, within the range of 1500-2300 meters, these traits perform well. Through comprehensive analysis, the walnut quality is the best at an altitude of 1700-2100 meters. [ABSTRACT FROM AUTHOR]

Objectives: According to the spatial attitude characteristics of the indoor walls, a point cloud vector tracking algorithm for automatically drawing the indoor plan was proposed.Methods: Firstly, the in⁃ door wall point cloud with a certain thickness was intercepted and projected onto the horizontal plane, and square grids were established on the projection plane. The plane points after projection were segmented and managed, and the point cloud in every grid was clustered by the eight neighborhood algorithm. Then the grid center of gravity method was used to generate sparse points, which were tracked and sorted according to the distance between points in the neighborhood and the angle of connection vector. The vector sequence of tracking direction was established, and the point cloud segmentation of different walls was completed combined with mutation of angle between adjacent values in the vector sequence. Finally, the least squares algorithm was used to fit the line of the same wall point cloud, and the intersection point of the adjacent wall line was obtained.Results: The plane projection line segment of the house wall and its spatial connection relationship were established. The wall projection line segment was output in sequence. The drawing of the house plan was completed and the DXF format data exchange file was exported.Conclusions: The proposed algorithm was verified by the analysis of indoor scanning data of a residential building. The results show that the proposed algorithm can accurately and quickly analyzed and processed the indoor laser scanning point cloud, and completed the drawing of interior plan. [ABSTRACT FROM AUTHOR]

Ｏｂｊｅｃｔｉｖｅ Ｔｏ ｉｎｖｅｓｔｉｇａｔｅ ｔｈｅ ｐｒｅｄｉｃｔｉｖｅ ｆａｃｔｏｒｓ ｆｏｒ ｔｈｉｒｄ － ｇｅｎｅｒａｔｉｏｎ ｃｅｐｈａｌｏｓｐｏｒｉｎ － ｒｅｓｉｓｔａｎｔ ｓｐｏｎｔａｎｅｏｕｓ ｂａｃｔｅｒｉａｌ ｐｅｒｉｔｏｎｉｔｉｓ （ＳＢＰ）． Ｍｅｔｈｏｄｓ Ａ ｒｅｔｒｏｓｐｅｃｔｉｖｅ ａｎａｌｙｓｉｓ ｗａｓ ｐｅｒｆｏｒｍｅｄ ｆｏｒ ｔｈｅ ｃｌｉｎｉｃａｌ ｄａｔａ ｏｆ ２０６ ｐａｔｉｅｎｔｓ ｗｉｔｈ ｌｉｖｅｒ ｃｉｒｒｈｏｓｉｓ ｗｈｏ ｗｅｒｅ ｈｏｓｐｉｔａｌｉｚｅｄ ｉｎ ｔｈｅ Ｎｉｎｔｈ Ｈｏｓｐｉｔａｌ ｏｆ Ｎａｎｃｈａｎｇ ｆｒｏｍ Ｊａｎｕａｒｙ ２０１０ ｔｏ Ｄｅｃｅｍｂｅｒ ２０１８，ａｎｄ ａｌｌ ｐａｔｉｅｎｔｓ ｈａｄ ＳＢＰ ｗｉｔｈ ｐｏｓｉｔｉｖｅ ｂａｃｔｅｒｉａ ｂａｓｅｄ ｏｎ ａｓｃｉｔｅｓ ｃｕｌ ｔｕｒｅ． Ａｃｃｏｒｄｉｎｇ ｔｏ ｄｒｕｇ ｓｕｓｃｅｐｔｉｂｉｌｉｔｙ ｒｅｓｕｌｔｓ，ｔｈｅ ｐａｔｉｅｎｔｓ ｗｅｒｅ ｄｉｖｉｄｅｄ ｉｎｔｏ ｔｈｉｒｄ － ｇｅｎｅｒａｔｉｏｎ ｃｅｐｈａｌｏｓｐｏｒｉｎ － ｒｅｓｉｓｔａｎｔ ＳＢＰ ｇｒｏｕｐ （１０１ ｐａ ｔｉｅｎｔｓ ｗｉｔｈ ｔｈｉｒｄ － ｇｅｎｅｒａｔｉｏｎ ｃｅｐｈａｌｏｓｐｏｒｉｎ － ｒｅｓｉｓｔａｎｔ ｐａｔｈｏｇｅｎｉｃ ｂａｃｔｅｒｉａ ｉｎ ａｓｃｉｔｅｓ）ａｎｄ ｃｏｎｔｒｏｌ ｇｒｏｕｐ （１０５ ｐａｔｉｅｎｔｓ ｗｉｔｈ ｐａｔｈｏｇｅｎｉｃ ｂａｃｔｅ ｒｉａ ｓｅｎｓｉｔｉｖｅ ｔｏ ｔｈｉｒｄ － ｇｅｎｅｒａｔｉｏｎ ｃｅｐｈａｌｏｓｐｏｒｉｎ）． Ｅｌｅｃｔｒｏｎｉｃ ｍｅｄｉｃａｌ ｒｅｃｏｒｄｓ ｗｅｒｅ ｒｅｖｉｅｗｅｄ ｔｏ ｃｏｌｌｅｃｔ ｒｅｌａｔｅｄ ｉｎｆｏｒｍａｔｉｏｎ． Ｔｈｅ ｔ － ｔｅｓｔ ｗａｓ ｕｓｅｄ ｆｏｒ ｃｏｍｐａｒｉｓｏｎ ｏｆ ｎｏｒｍａｌｌｙ ｄｉｓｔｒｉｂｕｔｅｄ ｃｏｎｔｉｎｕｏｕｓ ｄａｔａ ｂｅｔｗｅｅｎ ｇｒｏｕｐｓ，ａｎｄ ｔｈｅ Ｍａｎｎ － Ｗｈｉｔｎｅｙ Ｕ ｔｅｓｔ ｗａｓ ｕｓｅｄ ｆｏｒ ｃｏｍｐａｒｉｓｏｎ ｏｆ ｄａｔａ ｗｉｔｈ ｓｋｅｗｅｄ ｄｉｓｔｒｉｂｕｔｉｏｎ ｂｅｔｗｅｅｎ ｇｒｏｕｐｓ． Ｔｈｅ ｃｈｉ － ｓｑｕａｒｅ ｔｅｓｔ ｏｒ ｔｈｅ Ｆｉｓｈｅｒ’ｓ ｅｘａｃｔ ｔｅｓｔ ｗａｓ ｕｓｅｄ ｆｏｒ ｃｏｍｐａｒｉｓｏｎ ｏｆ ｃａｔｅｇｏｒｉｃａｌ ｄａｔａ ｂｅｔｗｅｅｎ ｇｒｏｕｐｓ． Ａ ｄｉｃｈｏｔｏｍｏｕｓ ｌｏｇｉｓｔｉｃ ｒｅｇｒｅｓｓｉｏｎ ａｎａｌｙｓｉｓ ｗａｓ ｕｓｅｄ ｆｏｒ ｍｕｌｔｉｖａｒｉａｔｅ ａｎａｌｙｓｉｓ，ａｎｄ ｔｈｅ Ｆｏｒｗａｒｄ：ＬＲ ｍｅｔｈｏｄ ｗａｓ ｕｓｅｄ ｆｏｒ ｔｈｅ ｓｃｒｅｅｎｉｎｇ ｏｆ ｉｎｄｅｐｅｎｄｅｎｔ ｖａｒｉａｂｌｅｓ． Ｒｅｓｕｌｔｓ Ｔｈｅｒｅ ｗａｓ ａ ｓｉｇｎｉｆｉｃａｎｔ ｄｉｆｆｅｒｅｎｃｅ ｉｎ ｔｈｅ ｃｏｍｐｏｓｉｔｉｏｎ ｏｆ ｐａｔｈｏｇｅｎｉｃ ｂａｃｔｅｒｉａ ｂｅｔｗｅｅｎ ｔｈｅ ｔｗｏ ｇｒｏｕｐｓ （Ｐ ＜ ０． ００１）． Ｔｈｅ ｕｎｉｖａｒｉａｔｅ ａｎａｌｙｓｉｓ ｓｈｏｗｅｄ ｔｈａｔ ａ ｈｉｓｔｏｒｙ ｏｆ ｂｒｏａｄ － ｓｐｅｃｔｒｕｍ ａｎｔｉｂｉｏｔｉｃ ｅｘｐｏｓｕｒｅ ｉｎ ｔｈｅ ｐａｓｔ ｔｈｒｅｅ ｍｏｎｔｈｓ （χ２ ＝ １２． ３５１，Ｐ ＜ ０ ００１），ｎｏｎ － ｆｉｒｓｔ － ｔｉｍｅ ｏｎｓｅｔ ｏｆ ＳＢＰ （χ２ ＝１４． ４２７，Ｐ ＜０． ００１），ｂｌｏｏｄ ｃｒｅａｔｉｎｉｎｅ （χ２ ＝ － ２． ５３７，Ｐ ＝ ０． ０１１），ａｎｄ ｂｌｏｏｄ ｂｉｃａｒｂｏｎａｔｅ （χ２ ＝ －４． ５９２，Ｐ ＜０． ００１）ｗｅｒｅ ｃａｎｄｉｄａｔｅ ｐｒｅｄｉｃｔｉｖｅ ｆａｃｔｏｒｓ ｗｉｔｈ ｓｔａｔｉｓｔｉｃａｌ ｓｉｇｎｉｆｉｃａｎｃｅ ｂｅｔｗｅｅｎ ｔｈｅ ｔｗｏ ｇｒｏｕｐｓ，ａｎｄ ｆｕｒｔｈｅｒ ｍｕｌｔｉｖａｒｉａｔｅ ａｎａｌｙｓｉｓ ｓｈｏｗｅｄ ｔｈａｔ ａ ｈｉｓｔｏｒｙ ｏｆ ｂｒｏａｄ － ｓｐｅｃｔｒｕｍ ａｎｔｉｂｉｏｔｉｃ ｅｘｐｏｓｕｒｅ ｉｎ ｔｈｅ ｐａｓｔ ｔｈｒｅｅ ｍｏｎｔｈｓ （ｏｄｄｓ ｒａｔｉｏ ［ＯＲ］＝２． ３７６，９５％ ｃｏｎｆｉｄｅｎｃｅ ｉｎｔｅｒｖａｌ ［ＣＩ］：１． ００９ －５． ５９８，Ｐ ＝ ０． ０４８），ｎｏｎ － ｆｉｒｓｔ － ｔｉｍｅ ｏｎｓｅｔ ｏｆ ＳＢＰ （ＯＲ ＝ ２． ８４１，９５％ ＣＩ：１． １３３ － ７． １２２，Ｐ ＝ ０． ０２６），ａｎｄ ｂｌｏｏｄ ｂｉｃａｒｂｏｎａｔｅ （ＯＲ ＝０． ８９２，９５％ ＣＩ：０． ８１８ －０． ９７３，Ｐ ＝０． ０１０）ｈａｄ ａｎ ｉｎｄｅｐｅｎｄｅｎｔ ｐｒｅｄｉｃｔｉｖｅ ｖａｌｕｅ ｆｏｒ ｔｈｉｒｄ － ｇｅｎｅｒａｔｉｏｎ ｃｅｐｈａｌｏ ｓｐｏｒｉｎ － ｒｅｓｉｓｔａｎｔ ＳＢＰ． Ｃｏｎｃｌｕｓｉｏｎ Ａ ｈｉｓｔｏｒｙ ｏｆ ｂｒｏａｄ － ｓｐｅｃｔｒｕｍ ａｎｔｉｂｉｏｔｉｃ ｅｘｐｏｓｕｒｅ ｉｎ ｔｈｅ ｐａｓｔ ｔｈｒｅｅ ｍｏｎｔｈｓ，ｎｏｎ － ｆｉｒｓｔ － ｔｉｍｅ ｏｎｓｅｔ ｏｆ ＳＢＰ，ａｎｄ ａ ｌｏｗ ｌｅｖｅｌ ｏｆ ｂｌｏｏｄ ｂｉｃａｒｂｏｎａｔｅ ａｒｅ ｉｎｄｅｐｅｎｄｅｎｔ ｐｒｅｄｉｃｔｉｖｅ ｆａｃｔｏｒｓ ｆｏｒ ｔｈｉｒｄ － ｇｅｎｅｒａｔｉｏｎ ｃｅｐｈａｌｏｓｐｏｒｉｎ － ｒｅｓｉｓｔａｎｔ ＳＢＰ，ａｎｄ ｔｈｉｒｄ － ｇｅｎｅｒａｔｉｏｎ ｃｅｐｈａｌｏｓｐｏｒｉｎｓ ｓｈｏｕｌｄ ｂｅ ｕｓｅｄ ｗｉｔｈ ｃａｕｔｉｏｎ ｉｎ ＳＢＰ ｐａｔｉｅｎｔｓ ｗｉｔｈ ｔｈｅｓｅ ｆｅａｔｕｒｅｓ． [ABSTRACT FROM AUTHOR]

Rural environmental planning is the primary means to promote the green and sustainable development of agriculture and rural areas. In this study, a bibliometric visualization analysis using CiteSpace was conducted to analyze the status quo and recent trends in the field of rural environmental planning based on 4 180 studies from 1995 to 2021 retrieved from CNKI, China database, and Web of Science core collection database. The results show that interest in the discipline of rural environmental planning continues to increase both domestically and internationally, the volume of literature on the subject is generally increasing, and the development of the discipline involves three stages: germination, steady growth, and rapid development; and the domestic development process lags behind that of foreign countries. Both domestic and international discipline distribution tend to be characterized by interdisciplinary and interdisciplinary integration. However, the field of discipline distribution in foreign countries is more extensive and balanced, with emphasis on basic theoryinnovation, index system construction, and technical method development, and the degree of inter-institutional cooperation is much greater than that of inter-author cooperation. The distribution of domestic subject areas is narrow and concentrated, the technical methods are mostly dependent on foreign research, and the cooperation between authors is more prominent. Domestic and international research hotspots show notable policy-oriented trends. Domestic research focuses on various levels of elements of rural environmental planning, such as rural spatial planning, human settlement environment planning, environmental protection and governance, and industrial planning. Foreign countries attach importance to the improvement of the core of disciplinary development. It is suggested to strengthen the construction of rural environmental system planning system under the guidance of policy, improve the innovation of Chinese rural characteristics under multiple disciplines, and promote the construction of rural index data in model application and development to promote the development of rural environmental planning in China in the new era in three aspects: policy management, disciplinary development, and technical methods. [ABSTRACT FROM AUTHOR]

In this study, Moringa oleiferia Lam. leaf tea and greengage were taken as the main materials with the accessories of honey and sugar, a compound beverage formula was prepared. Taking sensory score as evaluation index to study the effect of dosage of Moringa oleifolia Lam. leaf tea extract, greengage concentrate, sugar, and honey on the quality of compound beverage by using single factor experiment. Based on the single factor experiment, response surface method was used to optimize the formula of compound beverage, the quality of the optimized product was analyzed, and its antioxidant activity in vitro was investigated. The results showed that the best formula of Moringa oleiferia Lam. leaf tea and greengage compound beverage was as follows: the amount of Moringa oleifolia Lam. leaf tea extract was 52.0%, the amount of greengage concentrates was 5.5% the amount of honey was 4%, and the amount of sugar was 2.2%. The beverage with the formula was sweet and sour, golden in color, clear and transparent in texture, with strong Moringa leaf tea flavor and light greengage flavor. Meanwhile, the soluble solid content of the beverage was 6.80%, flavone content was 0.088 mg/mi., total phenol content was 0.094 mg/mI,, pH was 4.73. The antioxidant activity in vitro showed that 1,1—diphenyl-2—picrylhydrazyl(DEPH) and 2'—azinobis—(3—ethylbenzthiazoline-6—sulphonate)(ABTS) radical scavenging rates of the compound beverage were 90.5% and 36.4%, respectively. The compound beverage obtained in this study had a certain antioxidant capacity, and the preparation process was simple, so it had the potential to be used as a functional drink. [ABSTRACT FROM AUTHOR]

A method for the fast screening and detection of 193 pesticide residues in 3 traditional Chinese medicines containing alkaloids was established based on ultrahigh-performance liquid chromatography coupled to quadrupole-orbitrap high resolution mass spectrometry (UPLC-Q-Orbitrap HRMS). The samples were extracted by QuEChERS method, cleaned up by dispersed solid phase extraction (d-SPE) with cation exchange adsorbents, and separated by Agilent Poroshell 120 EC-C18 column (3.0 mm × 150 mm, 2.7 μm) with aqueous solution and methanol solution containing 0.1% formic acid and 5 mmol/L ammonium formate as mobile phase. Mass spectrometry adopted the full scan/data dependent acquisition mode (Full MS/ddMS²). External standard method was used for quantitative analysis. The results showed that 193 pesticides had good linear relationships within the corresponding concentration ranges, and the correlation coefficients (r) were all above 0.99, and the limits of quantification (LOQs) were 10-100 μg/kg. At three different spiking levels of 10, 50 and 100 μg/kg, the average recoveries of 193 pesticides in Rhizoma Corydalis, Rhizoma Coptidis and Cortex Phellodendri were in the range of 58%-120%, 68%-124% and 73%-122%, respectively, and the relative standard deviations (RSDs) were within 20% (n=6). The sample preparation of the established method is simple and rapid. Using the UPLC-Q-Orbitrap HRMS, through the quantitative and qualitative analysis of precursor ions and the qualitative confirmation of fragments ions and retention time, the screening accuracy of pesticide residues in traditional Chinese medicines containing alkaloids was significantly improved. It can be used for the rapid screening and daily risk monitoring of pesticide residues in the three traditional Chinese medicines containing alkaloids. [ABSTRACT FROM AUTHOR]

In order to find out the evolution laws of land ecological environment due to Super-large Coalface Mining (SCM)，a monitoring system of land ecological environment had been established at some typical workface in Shendong Coal Mine，the self-healing or natural healing abilities of land surface deformation，cracks and soil quality in the area had been investigated. The result shows that:① for an equivalent mining unit，the total amount of the surface movement and transformation of SCM was similar to traditional mining methods. However，the influenced time by mining was reduced around 50%，and the relative uniform subsidence region achieved 78% of the total subsidence area at once，its topography recovery as pre-mining showed a distinct ability of self-healing;② the ground cracks had obvious subarea feature with strong self-healing capacities. The dynamic cracks developed at uniform subsidence area without obvious heads in mining direction，which would close soon during the mining process. Its development cycle function was established with mining and geology. Marginal fissures occurred at mining boundary with ‘O’ shape，the angle of crack was nearly vertical. The width of crack trip was smaller than that in traditional mining，with the value range from 40-50 m;③ the changes of soil physical properties were consistent with the characteristic of surface deformation and ground cracks development. Within one year subsidence，the soil physical properties of uniform subsidence area tended to reach pre-mining levels，and most coal mining influence disappeared. By contrast，the heterogeneous subsidence needed manual control due to marginal cracks. The research results could provide a new principle for the ecology restoration at the coal mining subsidence area in the region. [ABSTRACT FROM AUTHOR]

重症肺炎是临床常见的危急重症, 具有高发病率及病死率等特点。目前, 重症肺炎的治疗主要 包括以抗感染、呼吸支持为主的器官支持、营养支持、维持内环境稳定等对症处理。大部分重症肺炎患者通过 上述治疗可取得较好效果, 但对部分重症肺炎患者效果不佳。俯卧位通气、支气管肺泡灌洗 (BAL) 在重症肺炎 诊疗中发挥了一定作用。该文就俯卧位通气、BAL 在重症肺炎中的应用研究进展进行了综述。 [ABSTRACT FROM AUTHOR]

【Objective】The present paper aimed to explore the research hotspots of mining wasteland reclamation and ecological restoration and analyze its trend.【Method】 Based on Web of Science core aggregate database as the data source, the research literature in the field of mining wasteland reclamation and ecological restoration from 2009 to 2019 was taken as the object of study. Based on the technology of text information visualization and Citespace, this paper introduced the latest research achievements and progress of mining wasteland reclamation and ecological restoration at home and abroad by establishing the relationship maps of cooperation characteristics and cooccurrence analysis through annual volume of papers, countries, institutions and authors. By using the methods of clustering cited documents and keyword co-occurrence analysis, this paper analyzed the research hotspots from the perspectives of scientific and technological text mining and bibliometrics, and summarized the development trend of this field in the past 10 years through the analysis of keyword co-occurrence. 【Result】 In recent years, the number of papers on mining wasteland increased year by year, more than doubling in 10 years. China’s research in the field of mining wasteland reclamation and ecological restoration was at a relatively advanced level. The contribution rate and centrality of the research papers were the first and third research fields, which were gradually becoming disciplinary, institutionalized and systematized, and tending to be perfect. Reclamation and land reclamation were the most frequent occurrences. The frequency of land, forest and climate change has increased significantly, which has gradually formed a new branch of research. 【Conclusion】 The research of mining wasteland reclamation and ecological restoration could be divided into two stages. From 2009 to 2015, the main focus was on the physical field, mainly from different land cover changes, accumulation density and plant population, etc. From 2016 to 2019, the main focus was on mining engineering, and related research was carried out on mining activities and the impact of mining wasteland on the surrounding areas. The research results can provide references for the development of mining wasteland reclamation and ecological restoration and the improvement of scientific research system. [ABSTRACT FROM AUTHOR]

【Objective】This paper aimed to explore the rapid estimation method of soil organic matter content in mining reclamation and provide technical reference for rapid monitoring of soil reclamation in mining.【Method】Taking a mining reclamation area in Hubei province as the research object, three kinds of spectral transformations were carried out on the spectral reflectance of reclaimed soil; Using both full-band and significant bands as two modeling data(correlation coefficient with organic matter content by P =0.05), the inversion model of soil organic matter content by using Partial Least Squares Regression(PLSR), Random Forest Regression(RFR) and Support Vector Machine(SVM) were established and optimized, and an arithmetic mean quadratic estimation based on the optimization model was performed.【Result】For the PLSR and SVM models, the significant band modeling R~2 and RPD were higher overall, while the RFR model uses the full-band modeling R~2 and RPD higher; The first-order differential PLSR model based on the significant band was the best for stability and prediction, R~2 and RPD were 0.77 and 2.14, respectively. Compared with the traditional single model, the arithmetic mean quadratic estimation could improve the estimation accuracy to a certain extent, especially in the standard normal transformation model, the lifting space was larger, showing better stability and prediction ability. 【Conclusion】Research showed that the selection of modeling data was an important factor affecting the accuracy of the model; After the first-order differential transformation of the spectral data, the model could have a better estimation effect; The quadratic estimation model based on the coupled model of the optimization model was better than the single model, and the PLSR(full band) + RFR(full band) model in the standard normal form had a relatively good inversion effect. [ABSTRACT FROM AUTHOR]

Taking farmland soils in Beijing plain as the research object, selecting different functional zones, different planting patterns and different types of parent material, the study systematically analyzed the horizontal and vertical distribution and influencing factors of heavy metal Cr in different soil depths(0~25 cm, 25~50 cm) from the point and the area based on the classical statistics and Empirical Bayesian kriging interpolation. The results showed that there was a certain difference in the Cr contents in different soil depths on the whole, with the highest average content of Haidian District and Fengtai District. In the spatial distribution, the Cr content in different soil depths was basically consistent in horizontal pattern, and gradually decreased outwardly with the urban area as the center. From the single factor evaluation method, the area within the warning line accounted for only 19.16%(0~25 cm) and 14.81%(25~50 cm) of the overall study area, showing obvious enrichment. The contents of heavy metal Cr in different functional zone were ranked in different soil depths:urban living zone > agricultural security zone > water source protection zone, and there was a significant effect on heavy metal Cr content in different soil depths. Different planting patterns and different parent material types had no significant effect on the Cr content in different soil depths, with no significant difference between groups. The research results may provide a scientific basis for the further treatment and management of heavy metal pollution in farmland soils. [ABSTRACT FROM AUTHOR]

With the progress of modern industrial technology, engineering practice ability of students needs to be improved. The traditional teaching model has been unable to meet the requirements. Therefore, it is necessary to establish a sound, efficient and scientific open laboratory management system, stimulate student's enthusiasm of independent learning,to improve innovation and research capacity, enhance team awareness and spirit. They are the goals of teaching and research assistance and reform. Based on the analysis of the current situation of Engineering Training Center, the major issues of open-center management construction project should be addressed, by combining with the actual situation. The management and construction of opening teaching mode in engineering training center were made from building the center open full-time information management system, establishing and improving the resource base, establishing students' works challenge data base, creating a membership-based management, and establishing reservation-training mode and so on. [ABSTRACT FROM AUTHOR]