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Nitrogen and phosphorus pollution was considered to be one of the main factors causing some water environment problems. However, microalgae and microalgae-bacteria consortium have special advantages in wastewater advanced treatment, therefore it has important significance to investigate and discuss the process and regular pattern of the transferring and transformation of nitrogen and phosphorus in wastewater for the treatment and utilization of them. In this paper, the path, morphological and influencing factors of transferring and transformation of nitrogen and phosphorus in water treated by microalgae-bacteria consortium were systematically described. The absorption mechanism of nitrogen and phosphorus by microalgae, and the synergic effect of microalgae-bacteria consortia system in the nitrogen and phosphorus cycle were analyzed and summarized. It was hoped to provide guidance for the treatment of different quality of wastewater and the optimization of treatment process, and give some scientific basis and theoretical support for water environment protection and restoration.

Taking the geoelectric field observation data of Yuanmou Julin of Chuxiong Earthquake Monitoring Center Station as the research object, combined with the ideas and specific contents of the two transformations since the geoelectric field observation，the observation data curve variation characteristics and data quality in three time periods before and after the two transformations are compared and analyzed，and the following experience is obtained，which can be used as a reference for the transformation and construction of other geoelectric field observation stations: ① The anti-interference ability and stability of solid non-polarized electrodes far exceed lead electrodes; ② Electrode buried depth need to consider more consistent soil electrical properties rather than pay attention to the buried depth，should do a good job in the construction of the site geological prospecting work，to ensure that the electrode buried after the grounding resistance without a big gap, but also should pay attention to the electrode lead buried depth must be greater than the farmers daily farming may touch the depth; ③ Double “L” type pole arrangement needs to be strictly in accordance with the construction specifications of the geoelectric station to arrange the long and short pole spacing; ④ For the insulation problem of overhead lines, it can be done between the hoop and the pole first through the insulation rubber pad insulation，and then between the hoop and the steel strand through the insulator re-insulating，especially the ground resistivity with the site observation station，more attention should be paid to the insulation of the steel strand.

With the continuous development of economy and industry, the demand for energy in modern society is ever-increasing. As a kind of high efficiency and low carbon energy, nuclear energy has attracted more and more attention. Developing nuclear energy, however, also brings some problems such as the release of radioactive metal ions that pose a threat to the environment and human health. Therefore, separation and removal of radioactive ions(e.g., U(Ⅵ)) from wastewater is of great significance to ensure the sustainable development of nuclear energy. Covalent organic frameworks(COFs) are a kind of periodic porous polymer materials composed of organic molecular units connected by covalent bonds. The emergence of COFs marks a new era in the field of materials. Because of the design ability of COFs and its unique advantages in structure and pore, it shows a good application prospect in catalysis, sensing and adsorption. Very recent efforts by some investigators have focused on the application of COFs in adsorption and separation of radionuclides, generally with encouraging results. According to the classification from the structural dimension, COFs can be divided into two-dimensional COFs materials(2D-COFs) and three-dimensional COFs materials(3D-COFs). Up to now, 2D COFs materials have been widely studied and applied. In contrast, the development of 3D-COF has been relatively slow, and the performance and application have been limited, a result of the limitations of molecular structural units and topological connections, as well as the difficulties of synthesis and structural analysis. To this end, in this paper, a combination of bond transformation and post-grafting was used to construct functional 3D-COFs materials for the efficient removal of U(Ⅵ) from wastewater. Firstly, the imine bond was reduced to an irreversible amine bond by reduction reaction, and then sulfonic acid group was introduced into the skeleton by reaction with 1, 3-propyl sulfonolactone to successfully synthesize COF-320-H2SO3. The structure and properties of COF-320-H2SO3 were characterized by various characterization methods, and the adsorption behavior of COF-320-H2SO3 on U(Ⅵ) was systematically studied. The results show that the chemical stability of COFs is significantly improved by the conversion of imine bond to amine bond, and the adsorption capacity of the material for U(Ⅵ) is clearly enhanced by the introduction of sulfonic acid group with hydrophilic and strong coordination ability. Even under the conditions of 3 mol/L HNO3, the adsorption capacity of U(Ⅵ) can reach more than 40 mg/g. This work further reveals the potential application value of COFs, especially 3D-COFs materials, in the separation of radioactive metal ions.

Copyright of Progress in Earthquake Sciences is the property of China Earthquake Administration, Institute of Geophysics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Science & Technology & Economy is the property of Grain Science & Technology & Economy Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The social change and ideological change movement in modern China promoted the reform of women's footwear, and the concept of women's choice of footwear and wearing them had changed, which was the innovation of the concept of women's footwear. The transformation of traditional women to have an independent personality step by step was reflected from the bow shoes of women with bound feet to the diversification of footwear for women with natural feet, women from the humble era of small feet to fighting for equal status with men, and then to the consumption behavior and methods of women's footwear of different classes. Thus, the process of changing the concept of women's footwear was also deeply engraved with the evolutionary trajectory of modern civilized women. We adopt the research method of comparative demonstration combined with historical documents, compare the attitudes towards women's foot-binding, natural feet, women's social space and women's social behavior in ancient and modern societies, and summarize three directions for the transformation of the concept of women's footwear in modern times including equality, fashion and hygiene. Furthermore, we explore the reasons and impact of the transformation. The following conclusions are drawn: (i) from the perspective of the spatial sequence of concept change, the concept of women's footwear in Shanghai, Tianjin, Guangzhou and other open-minded cities was first innovated, which was accompanied by a series of new social behaviors, and soon the new concept and new behaviors spread to the surrounding urban and rural areas through the flow of people and goods; (ii)from the perspective of the impact of concept change, the shapes of women's shoes were constantly changing, the colors were coordinated and broke the tradition before, and the materials were comfortable and hygienic, which reflected the domestic shoe industry; (iii) from the perspective of women's life practice, women of different classes had different consumption behaviors and ways of footwear, but the standards of pursuing beauty and the goal of modernization were the same, which promoted the progress of new women's lives. The research on the concept of modern women's footwear is an important part of the new trend of clothing in modern times. From the perspective of modern women's footwear reform, we closely combine social reform and ideological change movements, analyze the changes in women's wearing and choosing shoes before and after they put their feet on, and reveal the scientific understanding of new women's footwear. The spread and popularity of this concept have accelerated the modern people's ability to accept new shoe styles and new clothing, and promoted the transformation and development of modern clothing. [ABSTRACT FROM AUTHOR]

The growth of domestic jet fuel demand promotes the enhancement of jet fuel hydrogenation capacity of refineries. In 2015, SINOPEC Anqing Petrochemical Company transformed the catalytic gasoline hydrogenation unit into jet fuel hydrogenation unit, using the original FGH-21/FGH-31 catalyst to produce refined jet fuel products meeting the technical requirements of No.3 jet fuel. At the end of 2019, the capacity expansion project was implemented, the production capacity of jet fuel hydrogenation unit was increased from 0.4 MM TPY to 0.8 MM TPY, and the catalyst was replaced by FH-40A catalyst. The results of industrial operation show that under the conditions of 2.9 MPa reaction pressure, hydrogen to oil ratio no less than 80 and reaction temperature about 270 °C, the modified jet fuel hydrogenation unit can produce qualified No. 3 jet fuel stably, achieving the goal of improving the product structure and increasing the economic benefits of the enterprise. [ABSTRACT FROM AUTHOR]

Copyright of Guangdong Architecture Civil Engineering is the property of Guangdong Architecture Civil Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A brief introduction was given to the development history of AVS video coding standards.Then an overview of the key technologies adopted in AVS2 video coding standard (GB/T 33475.2-2016) was provided,including flexible prediction partition,multiple hypothesis prediction,optimized two-level transform,adaptive loop filter and background picture model based prediction coding for scene video.Compared to the AVS1,AVS2 can achieve more than 50% bits saving.And compared to HEVC/H.265,AVS2 can achieve significant coding efficiency improvement for scene video coding.Moreover,the applications of AVS standard in digital TV broadcasting was introduced briefly.

Copyright of Guangdong Architecture Civil Engineering is the property of Guangdong Architecture Civil Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Computational Mechanics / Jisuan Lixue Xuebao is the property of Chinese Journal of Computational Mechanics Editorial Office, Dalian University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Image & Graphics is the property of Editorial Office of Journal of Image & Graphics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Guangdong Architecture Civil Engineering is the property of Guangdong Architecture Civil Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Changzhou University (Social Science Edition) is the property of Editorial Department of Journal of Changzhou University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To migrate and reconstruct the hospital network to solve its problems in obsolete equipment, network architecture, software configuration and etc. Methods A network migration and reconstruction scheme was proposed based on the physical environment of one hospital with two addresses as well as some network technologies such as open shortest path first (OSPF) protocol, port trunking and stacking. Results The network migration and reconstruction were implemented as desired, and the core switching network was upgraded to ten gigabit Ethernet. Conclusion The hospital network is optimized in architecture, software configuration, reliability and performances, and lays a foundation for hospital informatization. [ABSTRACT FROM AUTHOR]

Copyright of Wool Textile Journal is the property of National Wool Textile Science & Technology Information Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

UML has become the de-facto standard for object-oriented modeling. However, it is still an informal language without a precise semantics. PVS is higher-order logic formal specification language. Transforming UML diagram into formal specification was studied in order to combine the advantages of both languages. An approach for transforming UML class diagram into PVS specification was given. Following the four-layer architecture of UML, meta-meta-model, meta-model and UML diagram are formalized in three steps, and the result of each step provides a context foundation for the next formalization. This approach is better in decreasing difficulty, ensuring correctness, and can retain much semantics. [ABSTRACT FROM AUTHOR]