bluuebunny/crossref_metadata_2025 huggingface dataset:
Progress in Photocatalysis of g-C3N4 and its Modified Compounds
Authors: Wu Yanling , Wang Yanmin , Li Miantuo
Published: January 2021

Recently, graphitic carbon nitride (g-C3N4), a polymeric semiconductorhas been widely used as a low-cost, stable, and metal-free visible-light-active photocatalyst in the sustainable utilization of solar energy, such as water splitting, organic photosynthesis, and environmental remediation, which has attracted world wide attention from energy and environmental relative fields. Base on analysis of structure and theoretical calculation, the reasons that g-C3N4 can be used as a non-metallic catalyst were discussed in this paper. Some group's research jobs that metal-supported g-C3N4, metal-supported g-C3N4/organnic semiconductor compound and heterogeneous junction adjust the semiconductor electronic band structure have been summarized. And the mechanism, effect factors, and research developments on the reaction of organic degradation by photocatalytic and splitting water for hydrogen revolution catalyzed by above-mentioned modified g-C3N4 were emphatically analyzed. Finally, the prospects for the development of highly efficient g-C3N4 based photocatalysts are also discussed.
Preliminary study on in-situ Sludge Reduction technology in the northwest arid areas expressway service area
Authors: Jing Zhao , Shegang Shao , haifeng Jiang , Xiao Wang
Published: January 2021

High-speed service area in the northwest arid areas as the research object, through on-the-spot investigation, sludge and solid waste within the northwest service types, quantity and so on various aspects of information are collected, on the basis of research on sludge reduction technology in situ service areas, to improve the improve the level of expressway service area of the country's solid waste treatment practice experience.
Study on Remediation of Hexachlorobenzene Contaminated Soil by Mechanochemical Method
Authors: Xue Li , Huichao Chen , Xiao Liang
Published: January 2021

The mechanochemical method is a potential way to destroy pollutants such as heavy metals and organic compounds due to its advantages such as complete reaction, adaptation of various pollutants and low energy consumption, etc. Research work was conducted to investigate the feasibility of remediating the persistent organic pollutants (POPs) contaminated soil and how the parameters influence the destruction of the pollutants. In the study, hexachlorobenzene (HCB) was used as a presentative of the POPs in soil. Natural minerals such as albite and magnetite were selected as additives to treat HCB contaminated soil with the application of mechanochemical method. The reasonable operation parameters as well as the soil properties on the destruction of HCB were determined. Analysis such as Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffractometer (XRD), X-ray Photoelectron Spectroscopy (XPS) and Raman Spectrometer were conducted for the supplement of mechanism study. A degradation rate of 92.5% for HCB was achieved under the optimal reaction condition. According to the XPS analysis results, the transformed valence state of iron, provided electrons for the destruction of HCB, on the basis of specific structure of albite. The amorphous carbon and graphite carbon were the final products of the destruction of HCB in the process of ball milling. The selected reagents with albite and magnetite would be viable for the damage of other POPs by mechanochemical method.
Research on the application of molecular simulation technology in enhanced oil-gas recovery engineering
Authors: Xu Jianping , Yuan Yuanda , Xie Qing , Wei Xuegang
Published: January 2021

In recent years, molecular simulations have received extensive attention in the study of reservoir fluid and rock properties, interactions, and related phenomena at the atomistic scale. For example, in molecular dynamics simulation, interesting properties are taken out of the time evolution analysis of atomic positions and velocities by numerical solution of Newtonian equations for all atomic motion in the system. These technologies assists conducting “computer experiments” that might instead of be impossible, very costly, or even extremely perilous to carry out. Whether it is from the primary oil recovery to the tertiary oil recovery or from laboratory experiment to field test, it is difficult to clarify the oil displacement flow mechanism of underground reservoirs. Computer molecular simulation reveals the seepage mechanism of a certain oil displacement at the microscopic scale, and enriches the specific oil displacement flow theory system. And the molecular design and effect prediction of a certain oil-displacing agent were studied, and its role in the reservoir was simulated, and the most suitable oil-displacing agent and the best molecular structure of the most suitable oil-displacing agent were obtained. To give a theoretical basic for the development of oilfield flooding technology and enhanced oil/gas recovery. This paper presents an overview of molecular simulation techniques and its applications to explore enhanced oil/gas recovery engineering research, which will provide useful instructions for characterizing the reservoir fluid and rock and their behaviors in various oil-gas reserves, and it greatly contribute to perform optimal operation and better design of production plants.
Design Of Intelligent Balcony Agricultural Cultivation Equipment
Authors: Yang Wenxiong
Published: January 2021

The original design of a new type of intelligent balcony agricultural cultivation equipment, the equipment mainly includes two parts: cultivation room and cultivation trough. The cultivation bottom trough is filled with soilless cultivation nutrient solution to provide nutrition for the growth of crop seedlings. The cultivation chamber can control the growth environment of seedlings. The equipment is also designed with an automatic control system to monitor the environmental factors of the air in the cultivation room and the nutrient components in the nutrient solution. The equipment adopts an integral closed structure, which can prevent mosquito breeding and bird invasion, and is suitable for agricultural planting and leisure use of family balcony.
Research Status and Countermeasures of photocatalyst in Water Pollution Treatment
Authors: Li Junye
Published: January 2021

With economic development and population growth, the demand for fresh water resources is also increasing. However, affected by sewage discharge from industry, agriculture, mining and domestic, not only the ecological environment and natural resources are seriously damaged, but also the water resources available for people to drink are decreasing day by day. How to improve the water pollution treatment technology has become an urgent task. Because of the high cost and great limitation, the traditional treatment method has no significant effect in water pollution control. As an advanced oxidation technology, photocatalyst can effectively degrade pollutants in water pollution, and has a positive effect on improving water quality, protecting natural resources and maintaining ecological balance.
Study of Occurrence Characteristics of Antibiotic Resistance Genes in Pig manure during Anaerobic Digestion and Digestate Fertilization
Authors: Xin-rong PAN , Lei CHEN , Heng YU , Jian-e ZUO
Published: January 2021

Antibiotic resistance genes (ARGs) existing in livestock and poultry manure have the risk to spread and proliferate. This might endanger people’s health. The common treatment of livestock and poultry manure is anaerobic digestion. But the change of ARGs during anaerobic digestion require further study, and the effect of digestate fertilization to the antibiotic resistance of cropland soil is still unclear. This study investigated the pig manure, biogas liquid, biogas residue, and cropland soils fertilized with and without digestate. The results showed that, the relative abundance of ARGs in biogas residue was much higher than other samples. The average relative abundance was 1.46×10-1 copy ratio (copy of ARG/copy of 16S rRNA gene), and the total relative abundance was 3.07 copy ratio. There were 21 ARGs detected in the 5 samples. 11 of them were shared by the 5 samples. The main ARGs were aminoglycoside, chloramphenicol, sulfonamide, tetracycline, and multidrug. Aminoglycoside had the highest relative abundance, and the total relative abundance in all samples was 1.18 copy ratio. Anaerobic digestion increased the total relative abundance of ARGs in pig manure from 1.14×10-1 to 1.70×10-1 copy ratio. Fertilization of digestate increased the total relative abundance of AGRs in soil from 3.27×10-1 to 7.29×10-1 copy ratio.
Research on Evaluation Index System of Green Highway in Reconstruction and Expansion Projects
Authors: Yan-gang Yang , Jian-ping Xia , Ran Zhao , Chen Li
Published: January 2021

This study summarizes and condenses the core requirements of green road construction in the reconstruction and expansion project, systematically analyzes the three typical representative green road evaluation index systems of GreenRoads, INVEST and Green-LITES. A green highway evaluation index system including 7 first-level indicators, 20 second-level indicators, and 52 third-level indicators has been constructed, The analytic hierarchy process was used to establish a step-level model, the relative importance of each index is determined according to the judgment of experts, and the weight coefficient of each level of index is obtained. In terms of policy requirements, related technology applications, green highway development trends, and the actual construction of the Beijing-Shanghai Expressway reconstruction and expansion project, the three-level indicator scoring method was determined. The green highway evaluation index system and evaluation model were used to evaluate the reconstruction and expansion project of the Beijing-Shanghai Expressway from Laiwu to Linyi (Lu-Sujie). It was determined that the comprehensive score of the project was 81.2, which reaching an excellent level.
New method for allocating high-speed railway infrastructure costs among train types
Authors: Ji Chao , Xu Chenyu
Published: January 2021

With the rapid development of China's high-speed railway (HSR), there are also many problems. For example, in the classification and calculation of HSR transportation costs, there is a lack of reasonable cost statistical methods. There are many types of high-speed train currently running on HSR (mainly G and D trains). There are differences in the speed, load and energy consumption of different types of trains. The resulting infrastructure usage costs also vary. However, all train costs are classified and calculated uniformly in practice. This paper proposes the expenditure rate method of the transport process allocating the infrastructure use costs among types of trains. Based on data from the Beijing-Shanghai high-speed railway, the cost of infrastructure is calculated, and the calculation results can reasonably reflect the cost allocation among types of trains. It makes the cost calculation of high-speed railway more accurate and lays a foundation for environmental cost calculation.
Study on Planning and Design Forest-themed High-quality Service Area
Authors: Ma Jianrong
Published: January 2021

In order to speed up the construction of green transportation system and promote the development of tourism services and service areas, this study takes the Yongning service area of Huaguan highway in Guangzhou as an example, on the basis of analysing the theory and technology of the construction of national forest cities, garden cities and green service areas, defines the concept, concept and goal of building high-quality service areas on forest theme; About 20 species of trees and shrub species suitable for the highway forest theme service area were selected, and the second study analysed the design techniques of the forest theme service area, the design techniques of the forest theme space planning and layout, the creation of the characteristic landscape of the buildings, the creation of the forest landscape of each green functional area, etc., to improve the quality, ecological function and tourism function of the service area.
A Comparative Study on the Examination System of CPA in the AI Evelopment Background Take China, Australia, the United States, the United Kingdom, Japan, and Germany as examples
Authors: Zhang Chao , Li Xinglin , Qi Yuzhu , He Yitong , Niu Jingwei , Xu Yiyi , Zhang Jiaying
Published: January 2021

At present, the globalization of the world economy continues to intensify, and the pace of technological modernization is accelerating. Artificial intelligence methods such as big data and financial sharing are gradually replacing traditional working methods in all walks of life, and the accounting industry is no exception. Under the dual impact of globalization and the development of artificial intelligence, the demand for training international compound accounting professionals is large and increasing, "CPA examination system" as one of the most authoritative examinations in the field of accounting, its matching with the current environment is particularly important. Starting from the current status of CPA examination, the author has made an in-depth investigation and study on the CPA examination systems in many countries including China, the United States, Britain, Japan, Germany and Australia by consulting a large number of relevant literature. Meanwhile, they systematically analyzed the CPA examination systems in various countries from four dimensions: examination organization, examination threshold, examination cycle and examination subjects, explored the similarities and differences of CPA examination systems in the world's mainstream countries, and summarized the common problems and the advantages that can be used for reference, which has practical significance for the design and update of the CPA examination system in China. At the same time, it provides reference significance for improving the professional quality of accounting personnel and accelerating the pace of changing the functions of accounting personnel.
Using Trend Extrapolation Model to Predict the Needs of Elderly Care Talents in Beijing Institutions
Authors: Song Aijia , Peng Zhaoqi
Published: January 2021

2020-2050 is a period of rapid development of China's population aging, and it is also a critical period for the country to actively respond to population aging. Under the background of the combination of medical care and nursing, institutional elderly care services, as an important branch of the multi-level elderly care service system, have become the main battlefield of the integrated medical and elderly care policy. Therefore, institutional care talents for the aged have also become a key link in improving the quality of life of the elderly population. This paper using trend extrapolation model to predict the needs of elderly care talents in institutions in Beijing, including nursing staff who provide basic living care and professional medical staff who provide services such as rehabilitation, medical treatment, nutrition, and psychological consultation. The results show that, in 2050, the demand for institutional elderly nursing staff in Beijing will exceed 150,000, and the demand for institutional elderly medical staff will reach about 20,000.
Protective Effects of Flavonoid and Polyphenol from Lotus Leaf on Lung Damage Induced by Inhalation of N2O4 in mice
Authors: Li Wenjun , Xu Ning , Hu Yong , Liu Zhijie , Li Wei , Li Deyuan
Published: January 2021

To study the protective effects of flavonoid and polyphenol (FP) from lotus leaf on the damage induced by N2O4 in mice. Constructing an animal damage model through exposing mice to 45μl N2O4 in a 120 L sealed cabinet for 30 minutes. ICR male mice were randomly divided into normal group, physiological saline+N2O4 group,1.25g/kgFP +N2O4 group, 2.50g/kgFP + N2O4 group, 3.75g/kg FP +N2O4 group. 1.25, 2.50, 3.75 g/kg FP were orally administered to mice respectively for 5 days, equal volume physiological saline for normal group and physiological saline+N2O4 group. Then, the three FP groups and the physiological saline+N2O4 group were exposed to N2O4 in the cabinet on 5th day. In an hour after N2O4 exposure, killing the mice by dislocation to measure the SOD, GSH-Px activity and MDA content in lung tissue, checking pathology change in lung tissue slice. Results were shown: the 1.25, 2.50g/kg FP increased SOD (U/mg pro) by 30.3% and 24.4%, GSH-Px (U/mg pro) by 77.4% and 60.9%, respectively. Pathological observation of lung tissue showed that three FP groups had lighter damage than the physiological saline+N2O4 group. So, FP has significant protective effects on damage caused by N2O4 in mice.
Research on the Current Situation and Countermeasures of Poverty Alleviation Driven by the TCM Industry in Hubei Province
Authors: Hao-Qi Wu , Ni Yan , Ling-Shan Li , Xiao Cheng
Published: January 2021

The year of 2020 is a decisive year for China to build a moderately prosperous society in all respects and fight against poverty. The traditional Chinese medicine (TCM) industry has become one of the main forms of poverty alleviation in China because of its functions of “making blood” and preventing poverty-returning phenomena. This study conducted a questionnaire survey and field interview on the situation of poverty alleviation driven by the TCM industry in Hubei Province from 2018 to 2019 to find out the problems of poverty alleviation in TCM industry and put forward corresponding countermeasures, so as to improve the long-term performance of poverty alleviation in TCM industry.
Rapid qualitative and quantitative detection of formaldehyde in squids based on colorimetric sensor array
Authors: Guan Binbin , Ding Hongmei , Chen Bin , Zhou Mi , Xue Zhaoli
Published: January 2021

The colorimetric sensor array was used to detect the volatile organic compounds (VOCs) in squids with different formaldehyde content. In order to distinguish whether the formaldehyde is artificially added in the squids, the linear discriminant analysis (LDA) and K-nearest neighbor (KNN) based on principal component analysis (PCA) were used to make qualitative judgments, the result shows that the recognition rates of the training set and prediction set of the LDA model were 95% and 85% respectively, and the recognition rates of the training set and prediction set of the KNN model were both 90%. Moreover, error back propagation artificial neural network (BP-ANN) was used to quantitatively predict the concentration of formaldehyde in squids. The result indicates that the BP-ANN model acquired a good recognition rate with the correlation coefficient (Rp) for prediction was 0.9887 when the PCs was 10. To verify accuracy and applicability of the model, paired sample t-test was used to verify the difference between the predicted value of formaldehyde in the BP-ANN model and the actual addition amount. Therefore, this approach showed well potentiality to provide a fast, accuracy, no need for a pretreatment, and low-cost technique for detecting the formaldehyde in squids.
Clinical Effect of Ozagrel Sodium Combined with Eureklin on Acute Cerebral Infarction
Authors: Shiheng Shen , Shaoxiong Yan
Published: January 2021

Cerebral infarction, as a serious cerebrovascular event, can lead to symptoms of various neurological disorders. The disability rate, mortality rate and recurrence rate are also very high, which is the health and economic burden of individuals, families and even human society. In this paper, 60 patients with cerebral infarction treated in our hospital were divided into observation group and control group. The observation group was treated with Ozagrel sodium combined with Eureklin, and the control group was given a single Ozagrel regimen The results showed that Ozagrel sodium combined with Yuclin was effective in the treatment of acute cerebral infarction.
Clinical Observation of Laparoscopic Anatomic Hepatectomy for Early Primary Liver Cancer
Authors: Shaoxiong Yan , Shiheng Shen
Published: January 2021

At present, liver resection is the most effective treatment for malignant liver tumors, and with the rapid development of medical technology, anatomical liver resection has been widely used in clinical practice. This paper mainly studies the clinical effect of laparoscopic anatomic hepatectomy in the treatment of early primary liver cancer. According to the surgical method, the patients were divided into anatomic and non-anatomic hepatectomy groups. Preoperative, intraoperative and postoperative efficacy data of the two groups were analyzed. According to the clinical results, the anatomical resection of liver cancer has short operation time, fewer postoperative complications, fast recovery of liver function, and long survival time without tumor, with obvious clinical effect and definite curative effect, which is worthy of promotion.
The influence and countermeasures of the application of blockchain on the investment efficiency of cultural industry ——- DEA Analysis of listed companies based on blockchain concept
Authors: LI Jian-bo , ZHANG Rui , YIN Yue
Published: January 2021

Block chain technology has changed the traditional digital economy, promoted the formation of a new value and trust system, and at the same time triggered the transformation of cultural industry, providing a means to improve investment efficiency. This paper takes the listed companies of cultural industry in the concept of block chain as the research sample, and uses DEA efficiency evaluation method to empirically analyze the change of cultural industry investment efficiency. The results show that: block chain technology has an impact on pure technical efficiency and also promotes profit growth. However, the development and application of block chain technology need to be more integrated with cultural industry investment to open up a new development path for the traditional information society.
Investigation of Cognition with Schema Model
Authors: Mu Gefei
Published: January 2021

Schema model (schema network) is a model established on the concept of neural network, networking memory, and the subconsciousness. It is also related to psychoanalysis which is barely seen in papers of neuroscience today. This paper reviews different pre-existing theories around “cognition” and schema. To some extent, it redefines subconscious without being overly philosophic and creates a system which is another perspective to view cognition. The schema model is composed of three parts, including input, subconsciousness and cognition and it is observed that cognition can only do three things, which are reasoning, imagination and centre executive. The subconsciousness is composed of some well associated models and unassociated models, as people can conclude the associated models from environment but unassociated models usually cannot be obtained as they are learnt because of the gatekeeper. The original schema theory explains all the behaviours [8] but predicts little things, so the author proposes a schema network by combining the theory with interdisciplinary knowledge to explain human behaviours more thoroughly. The purpose is to explain cognition, subconsciousness of human in a new way, and hopefully people can use it to find implication on education, sociology and artificial intelligence, or prevention of mental disorders.
Investigation and analysis of the fungal community structure in moldy Lonicerae japonicae Flos through ITS2 sequencing
Authors: Liu Zhenying , Zhao Yan , Wang Lingna , Pu Gaobin , Zhang Yongqing
Published: January 2021

Lonicerae japonicae Flos is a traditional Chinese medicine that has the effect is used for clearing away heat and detoxification. When stored improperly, this medicine is susceptible to mold growth, causing fungal contamination, reducing its safety and clinical efficacy. In order to understand the fungal contamination of Lonicerae japonicae Flos, we utilized the Illumina NovaSeq6000 platform to characterize fungal communities associated with five moldy Lonicerae japonicae Flos samples from warehouses in China via the sequencing of fungal internal transcribed spacer 2 regions. These analyses led us to identify 3 phyla, 5 classes, 7 orders, 9 families, 13 genera, and 20 species of fungi in these samples. Of these, Ascomycota was the dominant phylum, while Cysticomycetes, Ascomycetes, and Staphylococci were relatively dominant at the class level, and the most prevalent genera were Aspergillus, Penicillium, Xanthomonas, Microcystis, Talaromyces, and Erysiphe with relative abundance values of 79%, 21%, 94%, 100%, and 98%. In summary, in the present study we conducted the ITS-based comprehensive characterization of fungal communities associated with Lonicerae japonicae Flos for the first time. This approach aims to facilitate the early detection of fungal contamination in Lonicerae japonicae Flos, providing a theoretical basis for the study of anti-mold technologies.
Changes in flavor compounds of Aloididae aloidi during enzymatic hydrolysis
Authors: Bai Xuting , Li Tao , Zhao Honglei , Li Xuepeng , Zhu Wenhui , Bu Ying , Li Jianrong , Xu Yongxia
Published: January 2021

Protamex was selected to prepare the hydrolysate. E-tongue, free amino acid combined with soluble peptide analysis were used to detect the flavor changes of Aloididae aloidi during enzymolysis. Degree of proteolysis increased with the prolongation of enzymolysis time, and reached the maximum value at 8 hours. The content of soluble peptide of hydrolysate increased firstly and then decreased in the later process. The E-tongue could effectively distinguish the taste difference of hydrolysates at different enzymolysis time, and the hydrolysate presented strong bitterness and astringency during the whole enzymolysis. The total amount of free amino acids in the hydrolysate increased gradually, and some sweet, umami and bitter amino acids increased in varying degrees during the process of enzymolysis.
Research on the Manufacture of Moringa Milky Tea
Authors: Wang Rui , Hu Shiwen , Zhou Qian
Published: January 2021

In this research, moringa, black tea, milk powder, white sugar and sucrose ester were used as raw materials, and the optimal processing technology of moringa milky tea was studied by single factor and orthogonal experiments. These results showed that the optimal formula for moringa milky tea was: 7:8 of ratio of tea liquor (black tea liquor: moringa liquor), 11% of milk powder, 4% of white sugar and 0.9% of sucrose ester. Moreover, the milky tea processed with this formula has a strong milk flavor, a delicate and soft taste.
Fermentation process optimization and chemical composition analysis on black tea wine
Authors: Zou Chun , Xu Yongquan , Chen Jianxin , Li Ruyi , Wang Fang , Yin Junfeng
Published: January 2021

In this study, the fermentation process of black tea wine was optimized, and the changes in catechins, organic acids, and aroma components during fermentation were investigated. The optimal fermentation conditions for tea wine were determined as follows: the addition of 15% sucrose and 0.75% tea leaves, and a fermentation temperature of 25 ºC. Under the optimal conditions, the alcohol content and sensory evaluation score of tea wine were 8.9 %ABV and 88, respectively. The contents of catechins and organic acids in tea wine were 21.29 mg/L and 3.68 mg/mL, which were 1.32-fold and 10.51-fold higher than those of tea infusion, respectively. L-malic acid was the main organic acid in tea wine, which accounted for 56.3% of the total amount of organic acids. A total number of 34 and 33 kinds of aroma components were detected in tea wine and tea infusion, respectively. The main aroma components of tea wine were esters and alcohols, which accounted for 39.7% and 45.9% of the total amount of aroma components, respectively, while the main aroma components of tea infusion were esters and aldehydes, accounting for 34.6% and 33.2%, respectively.
Fresh Fruit Time based on STP analysis and statistics method (Changchun) Word-of-mouth marketing strategy research
Authors: Liu Yingjie , Shan Hongzhong
Published: January 2021

At this stage, the beverage market has become the Red Sea. HEYTEA, Naixue’s Tea at the top, and Michelle Ice City, which occupies third- and fourth-tier cities, account for most of the total market. How to gain a competitive advantage in the beverage market where competition is fierce and marketing methods tend to be consistent is a problem that Fresh Fruit Time (Changchun) needs to solve. This paper analyzes the existing marketing mix of Fresh Fruit Time (Changchun) and finds that it has shortcomings in word-of-mouth marketing. With the help of STP analysis and statistics method, combined with Fresh Fruit Time’s product characteristics and business philosophy, it identifies young white- collar women as the target market, positioning a healthy and comfortable buying environment, and proposing word-of-mouth marketing suggestions for creating topical events through related media, viral communication and search marketing optimization. The combination of STP and statistics method is an innovation, making statistical methods more realistic.
Effect of polypropylene thick/basalt composite fibers on the mechanical properties of large dose slag fly ash concrete
Authors: Feng Xiangrui , Li Zhenshu , Ma Anjing
Published: January 2021

In this experiment, the effects of polypropylene thick fiber (PPTF) with different volume admixtures (0, 0.05%, 0.10%, 0.15%, 0.20%, 0.25%) on the compressive strength, splitting tensile strength and bending strength of large admixture of slag fly ash concrete were investigated with short-cut basalt fiber (BF) as a reference. The results show that the polypropylene thick fiber can work well with basalt fiber and improve its strengthening effect of single admixture. And 0.10% of polypropylene thick fiber and 0.10% of basalt fibers by volume have the best strengthening effect on the mechanical properties of the large amount of slag fly ash concret.
Research on flexural performance of damaged RC beams strengthened by FPR plates
Authors: Liu Jiarui , Cui Xian
Published: January 2021

Combining two technologies of pasting fiber reinforced composite board (FRP) and externally reinforced steel plate concrete structure, fiber-reinforced composite material and steel plate composite reinforced concrete structure technology can effectively improve the stress performance of concrete reinforced structure. To explore the effect of the new technology steel plate anchoring FRP slab concrete beams and the effect of different damage levels on the reinforcement effect, in this paper, the author made 3 FRP reinforced beams with damage rates of 20%, 40%, and 60%, 1 RC beam with FRP plate only and an ordinary RC beam to analyze the reinforcement effect of the new process steel plate anchored FRP plate and the bearing capacity and plastic performance of the reinforced beam with different damage rates. The results show that the new technology steel plate anchoring FRP plate reinforcement technology can effectively prevent the occurrence of early peeling failure, improve the ductility and bearing capacity of the reinforced beam, and significantly increase the utilization rate of the FRP plate; as the damage rate increases, the ultimate bearing capacity of the reinforced beam increases, but the ductility is significantly reduced.
Research on Bearing Capacity of Simply Supported Skew Bridge Based on Load Test
Authors: Li Songhui , Li Honglei , Gao Jinjin
Published: January 2021

The purpose of this paper is to use static and dynamic load tests to evaluate the mechanical performance of a simply supported skew slab bridge and to evaluate its actual bearing capacity. Firstly, the Midas Civil software is used for theoretical simulation, and secondly, the deflection, strain, and dynamic response of the key section of the bridge are studied through static and dynamic load tests. Finally, the measured values and theoretical values are compared and analyzed. The results show that: under static load, the relative residual deflection and relative residual strain of the measuring point of the structure are between -13.8%～-0.4% and -16.7%～1.8% respectively; Under dynamic load, the first-order vertical natural frequency of the test section is 7.813, and the damping ratio is 0.0316, indicating that the bridge is in an elastic working state under the test load, and the stiffness and bearing capacity can meet the requirements of the current code.
Simplified Calculation and Computer Comparison of Wall Beam
Authors: Zhang Lei
Published: January 2021

Given the problems existing in the design method of wall beam in criterion GBJ3-88, the distribution of stress and internal force is investigated by the finite element analysis of simply supported wall beams, and the approximate calculation formula of internal force of the supporting beam and the simplified calculation formula for bearing capacity is proposed.
Design and research of reclaimed water system in Chifeng College Dormitory
Authors: Zhang Yaxin , Li Qiang , Zhang Yafeng , Wang Qian , Li Xiaowei , Shuai Ying
Published: January 2021

With the continuous development of reclaimed water treatment technology, the development and research of wastewater treatment and reuse technology and equipment suitable for colleges and universities can not only eliminate the pollution of wastewater to the environment, but also reduce the cost of water use in Colleges and universities. The reclaimed water can be used as campus toilet and clean water. Chifeng College Dormitory water utilization system transformation, a lot of saving water and sewage charges, saving the water pipeline laying and operation of the corresponding facilities investment, corresponding to reduce the school operating costs.
Water level collapse effect of deep well in mining area
Authors: Mei LIN , Xiaona DONG
Published: January 2021

The use of Zaozhuang of Shandong province coal mine area is tao chong lu 15 Well and meteorological observation data, the three elements of observation Wells with tao chong effect comparing the dynamic characteristics of the mines. It is difficult to determine whether the stress state of the aquifer system in which the well was observed before the collapse has changed because of the water level in the deep well of Lu15 well on the original curve. Nakai fitting model is adopted to calculate the earth tide response amplitude factor ratio based on the water level data of Lu15 well, and the possibility of collapse caused by stress change is discussed in combination with non-natural seismic events in Taozhuang Coal mine
Study on Copula-based Coordination of Urban Drainage system and Sewage system Design
Authors: Yixuan Zhong , Xiaolong Liao , Ling Yi , Leping Wu
Published: January 2021

The urban drainage system is co-regulated by various governmental departments, who adopt different standards in designing the system, an attempt not conducive to the prevention of water logging. This study took Zhongshan and Zhuhai as the subjects, proposed the Copula-based design of a drainage system, and calculated the most practical solution to drainage, waterlogging and rainfall based on Kendall’s Return Period, providing references for construction of such projects.
The effect of curing conditions on the expansion efficiency of MgO expansion agent
Authors: Fang Yu , Yongchao Li
Published: January 2021

In order to further promote the research and application of MgO expansion agent in concrete field, this paper carried out the effect of different humidity and temperature conditions on the expansion properties of mortar and mortar specimens mixed with MgO expansion agent. In addition, the mechanism of the factors affecting the sensitivity of the MgO expansion agent is revealed by combining microscopic technology. The results show that the higher the curing temperature and the greater the curing humidity, the greater the expansion efficiency of the MgO expansion agent. The temperature of 20~40°C has no obvious effect on the efficiency of the MgO expansion agent, but the expansion value of the specimen doubles as the temperature rises to 40~80°C. Besides, the higher the curing humidity, the better the expansion efficiency of the MgO expansion agent, but the MgO expansion agent is more sensitive to the low humidity environment, and the specimen shrinks in the lower humidity environment (RH=60%).
Preliminary study on Coupling numerical model of hydrology and hydrodynamics for The Typical Area of Pearl River Delta
Authors: Jiao XUE , Xiaolong LIAO , Leping WU , Guibing HOU
Published: January 2021

The implementation of the national strategy of Guangdong, Hong Kong and Macao Great Bay Area has put forward higher requirements for flood control and security in the Pearl River Delta. In this paper, region protected by Zhongshan and Zhuhai dike, which is the Qianshan River Basin, is selected as the typical area of Pearl River Delta. The flood control security of this regional is affected by flood upstream, local rainstorm and tidal level downstream. For this region, a coupled hydrological and hydrodynamic model is built and the model parameters are calibrated by measured data in June 2008 and verified by measured data in July 2012. The calculated results match well with measured data and meet the precision requirement. This research established foundation to study flood control and security in Guangdong, Hong Kong and Macao Great Bay Area.
Analysis and Research on the Regional Adaptability of Sponge City
Authors: Sun Siwei
Published: January 2021

Based on the three values of per capita water resources, precipitation, and sewage and wastewater discharge, our country’s cities are divided into three types: water resource shortage, water quality shortage, and water pollution and water-logging risk cities. Comparing these three kinds of sponge cities, combining with the regional differences of my country’s first-tier, new first-tier and second-tier cities, determine the types of sponge cities in my country’s important cities. In view of the different water problems of the three types of cities, the regional adaptive construction plan of sponge cities is summarized.
Analysis of the Status Quo and Countermeasures of Civil Construction Technology in Building Engineering
Authors: Zhao Benyu
Published: January 2021

The rapid development of the construction industry has made great progress in civil engineering construction technology. As an important part of the construction of civil engineering construction, the advanced nature of its construction technology is directly related to the overall engineering construction level, and affects the construction of other projects in the later period. To this end, we must master the essentials of basic civil construction technology. At the same time, we also need to improve and innovate existing technologies based on market demand, learn the essence of advanced technologies and combine them with engineering practices, and innovate engineering quality management methods. Only in this way can the quality of civil engineering be ensured. In view of this, this article will discuss how to improve the quality of civil engineering through the innovation of ideas, systems and technologies on the basis of analyzing the status quo of the application of civil engineering technology in construction engineering.
Research on the Edge Space Construction in Urban Residential Districts Based on “Field and Behaviors” -Taking Tan Hualin Historic District in Wuhan City as an Example
Authors: Wang Xuyan
Published: January 2021

The edge space lies between the “black” and “white” part of the city, associates the vagueness of the space with “ambiguity” and are the places to inspire people to interact with each other. Edge space is also becoming more and more important in increasingly alienated cities due to its heterogeneity and integration, but the vitality of edge space in cities is uneven. This paper taking Tan Hualin edge space configuration as the research unit, according to the chart of survey data, conducts a comparative analysis of the spatial “field” and human “behaviors” of the edge space between Tan Hualin commercial district and Tan Hualin residential district, so as to explore the reasons why the edge space of urban residential district is more dynamic and to enrich the types of environment construction of edge space in urban district .
Study on Bias Control of Memristor Multistablity System
Authors: Zang Hongyan , Huang Lili , Wang Yanling , Lei Tengfei
Published: January 2021

In this paper, we study a memristor chaotic system with bias control. Based on the analysis of basic dynamic behavior, the hidden attractor coexistence and multi-stability of the non-equilibrium memristor chaotic system are verified, the bias control based on DC power control is studied, and the polarity control of the output variable is realized by using the change of parameters. The sinusoidal function is introduced as the bias periodic function, so that the system can realize signal polarity control only by changing the initial conditions. The analog circuit of memristor chaotic system is designed and verified by simulation..
Research on Furnace Temperature Curve Based on Heat Convection and Heat Radiation
Authors: Lei Qiaoyun , Zhang Ziyou , Zhuo Songyi , Lin Kangju
Published: January 2021

Insights into the mechanism of reflow soldering temperature curve, a mathematical model of the temperature change of the circuit board surface is established. The heat transfer methods, heat radiation and heat convection is analyzed in detail. The curve of air temperature inside the reflow furnace is solved by establishing an one-dimensional heat conduction model and fitting coefficients. The heat radiation received by the circuit board mainly comes from the small temperature zone. Depending on the area where the circuit board is located, heat radiation is itemized into 3 types: heat radiation in the gap, the temperature zone and the adjacent temperature zone of the area before and after the furnace. The impacts of heat radiation is weighted and analyzed by relative distance. For coefficients, analyzing and fitting is further discussed.
Research on Intelligentized Anti-UAV Command Control Scheme Technology
Authors: Jie Chen
Published: January 2021

In view of this situation, our research project aims at accurately locating UAVs in detection mode, effectively damaging UAVs in defensive means, and constantly suppressing UAVs in key technologies. The optimal anti-UAV scheme is formulated. Combining with the above anti-UAV program, together with the control of relevant monitoring ZTE and decision-making center, the anti-UAV prevention and control command system is set up in the camp. According to the characteristics of different types of UAVs, the system can formulate effective anti-UAV plan for deployment, and also can play a significant role in the defense of key protected areas.
Optimal Structure and Size of Multi-segment Soft Robotic Arms with Finite Element Method
Authors: Li Xiaohui , Zhang Wei , Zhao Liping
Published: January 2021

Pneumatic actuate of multi-segment soft robotic arm is a significant structure and has extensive applications. However, the study of the optimal structure and size of multi-segment soft robotic arm has not been achieved. In this study, the finite element method is used to optimized the structure and size of soft robotic arm. We report that the two-segment structure of soft robotic arm has better performance for the general manipulator operation task through evaluating bending angles with different structures and parameters. The optimal ratio of the total length of non-cavity section to the total length of the soft robotic arm with two-segment is 0.21. And soft robotic arm performs better when the length of the fixed first section, the linkage section between two cavity sections and the end section are equal. Two cavities in each segment has more advantages in tasks of plane bending, while three cavities structure has better adaptability when the task need bend in the space. These results in this study provide a reference and simplify the process for the structure and size design of the multi-segment soft robotic arm in the future.
Modeling and Simulation of Spacecraft Power System Based on Modelica
Authors: Wang Haosheng , Zhong Hongen
Published: January 2021

Spacecraft power system simulation involves the coupling of electrical, thermal and control domains. At present, the modeling and simulation of multi-domain physical system mainly uses the single-domain software to establish a single-domain model, and solves the unified multi-domain modeling and simulation through the interface between the software or using HLA. But it cannot fully support the modeling and simulation of multi-domain physical system, and the model has poor reusability and extensibility. As a multi-domain modeling language, Modelica language supports acausal modelling, unified multi-domain modeling, object-oriented physical modeling and hybrid modeling. So it is widely used in the aerospace area. In this paper, Modelica language is used to establish module library of spacecraft power system on simulation platform MWorks, and the multi-domain simulation model of spacecraft power system is obtained by assembling each sub-model, and the performance of the model is simulated and analyzed so as to achieve the purpose of improving and verifying the model.
Optimization of hinge point in luffing mechanism of aerial working vehicle based on PSO algorithm
Authors: Xu Yongjie , Xing Bangsheng , Cai Lei
Published: January 2021

Luffing mechanism is one of the important parts of aerial working vehicle, which plays a decisive role in the overall stability of boom system, the force of luffing cylinder and the force at each hinge point position. In this paper, the five hinge point luffing mechanism of aerial working vehicle is taken as the research object, and the force of its luffing cylinder under dangerous conditions is optimized. By studying the working principle of the boom system and the force analysis of the luffing mechanism, and then establishing the mechanical model, the objective function was optimized based on particle swarm algorithm and Matlab. The optimization results show that the maximum force on the luffing cylinder decreases by 18.9% with the optimized hinge points, which greatly improves the performance of the whole machine and provides a reference for the application of particle swarm optimization in construction machinery.
Research status of damage identification algorithm based on deep learning
Authors: Denghui Zhu , Lizhong Song , yuan Feng , Quanshun Yang
Published: January 2021

One of the core tasks of computer vision is target detection. With the rapid development of deep learning, target detection technology based on deep learning has become the mainstream algorithm in this field. As one of the main application fields, damage identification has achieved important development in the past decade. This paper systematically summarizes the research progress of damage identification algorithm based on deep learning, analyzes the advantages and disadvantages of each algorithm and its detection results on voc2007, voc2012 and coco data sets. Finally, the main contents of this paper are summarized, and the research prospect of deep learning based damage identification algorithm is prospect.
Preload assisted laser thermoforming at low-temperature
Authors: Guo Yankuo , Shi Yongjun , Wang Xiaogang , Zhao Xiaoyu
Published: January 2021

Laser thermoforming is widely used to produce rapid prototyping parts of sheet metal. Laser multiple scanning or single high-temperature scanning is often used to obtain a large bending angle. This method produces high heating temperature, which destroys the material characteristics and reduces the material use value. A method of forming at low heating temperature is proposed to overcome the aforementioned problems, and the mechanism of thermo-mechanical action is studied. Results show the positive application of preload in the low-temperature forming method can increase the bending angle by up to 39.00 times. The low-temperature forming method is important for reducing energy consumption, protecting workpiece material properties, and applying laser in practical production.