bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Harm Degree of PM2.5 Atmospheric Particulate Pollution to Human Health
Authors: Gao Yeling
Published: March 2021

Today’s haze weather, as an atmospheric environmental pollution that seriously endangers human health, plagues most cities and regions in my country, and fine particulate matter in the air (especially PM2.5) is an important pathogen that poses a serious threat to human health. The toxic and harmful (allergic) substances contained in PM2.5 and pathogenic microorganisms such as bacteria and viruses can induce and aggravate human respiratory diseases, cardiovascular diseases, cancers and metabolic diseases, and increase the incidence and death of these diseases Rate; PM2.5 enters the lung tissue through the respiratory tract, and then enters the blood circulation through the capillaries, through direct damage to the human body, inflammatory damage, stimulating the human body to produce oxidative stress, damaging the human body’s immune system, and mutating human DNA And other effects, causing harm to human health. This article takes PM2.5 as an example to summarize the research status of PM pathogenicity, in order to attract the attention of pathology research field.
Comprehensive utilization of paigeite greening and efficient
Authors: Zhang Zexi , Yang Yanchun , Lv Xiaoshu , Wang Xiyao
Published: March 2021

In the paper, according to the chemical composition of paigeite and mineral structure, designing a clean, efficient and comprehensive utilization process. Through roasting paigeite with ammonium sulfate, magnesium, iron, aluminum, boron in paigeite changes into water soluble products, silicon exists in the form of silica, insoluble in water. Roasting product is dissolved by water, filtration. The magnesium, iron, aluminum and boron are separated from silicon dioxide. Magnesium, iron, aluminum, boron is formed precipitation on the difference value of pH, adding alkaline material such as NH3 solution to adjust the pH value of solution, such as magnesium, iron, aluminum, boron fractional precipitation and separation. Sulfuric acid root into ammonium sulfate, evaporation crystallization returned after roasting. Chemical raw materials recycling.
Gypsum Boards Reinforced with Cotton Dust Fiber
Authors: Khorjitmate Sujira , Miyata Ken , Kwankhao Bintasan , Sukpancharoen Somboon
Published: March 2021

This research was aimed to study the production of gypsum boards mixed with cotton dust fiber for construction purposes. The cotton dust fiber 5, 10, 15, and 20% by weight was mixed with gypsum plaster and cast in the size 300 × 400 × 9 cubic millimeters. The water content was added 77 % by weight of the mixture. The ultimate strength, modulus of rupture, and weight of the gypsum board were investigated. The results showed that the ultimate strength and modulus of rupture of the gypsum boards without cotton dust fiber were 168.78 Newton and 3.66 Mega Pascal, respectively, which met the criteria for standard gypsum board under TIS 219-2524. However, the ultimate strength and modulus of rupture of the gypsum board mixed with cotton dust fiber were lower than the standard gypsum board. The weight of the gypsum board was decreased when the cotton dust fiber content was increased. It was found that the appropriate ratio of gypsum plaster and cotton dust was 90:10 incorporated with 6 wt. % PVA. The ultimate strength and modulus of rupture of the appropriate gypsum board were 135.31 N and 3.13 MPa, which was the criteria standard gypsum board products (TIS. 219-2524). The weight of the appropriate gypsum board was lighter than the gypsum board without cotton dust fiber addition about 289.75 grams (21 percent). Therefore the gypsum board mixed with cotton dust fiber could be developed for the construction, ceiling, and wall.
Effect of Controlled Cold-Controlled Rolling Process on Properties of Q550D Steel Plate
Authors: Li Junsuo , Liu Yanxia , Wang Yang , Dong Zhongqi
Published: March 2021

It is used that method for controlling the point of the process to component control and TMCP rolling in order to study the key factors controlling the performance of TMCP Q550D plate and improve the comprehensive qualification rate of TMCP state Q550D. Results show: the content of C, the cooling temperature, the temperature uniformity and the water temperature are the key components of the TMCP state performance of Q550D. The TMCP state Q550D has good welding performance and low yield strength ratio after the control process. The qualified rate of TMCP state has been increased to 90%, saving a lot of tempering process.
Mechanism of Kaempferol in Anti-inflammation Based on Network Pharmacology
Authors: Qin Ping , Wu Hongmei
Published: March 2021

To explore the mechanism of kaempferol in treatment of anti-inflammation based on network pharmacology. The chemical ingredient targets of kaempferol were obtained from Traditional Chinese Medicine Systems Pharmacology Database (TCMSP). The predicted targets related to predicted targets related to inflammation were obtained from GeneCards database. The prediction target of kaempferol was mapped with the target of inflammation to get the prediction target of kaempferol to anti-inflammatory. Cytoscape 3.7.1 software was used to draw the kaempferol targeted-anti-inflammatory targets network. Protein interaction network was made through STRING database. GO and KEGG were analyzed by the “ClueGO” plug-in of Cytoscape 3.7.1 software. There were 61 targets for kaempferol, 3416 disease genes were obtained, and 50 same targets were found. Important targets were screened out, such as AKT1, TNF, PTGS2, GASP3, MAPK8, JUN and GASP3. KEGG signaling pathways was screened, and 20 signaling pathways were obtained, including TNF signaling pathway, IL-17 signaling pathway, Apoptosis, non-fatty liver disease (NAFLD), and so on. Kaempferol mainly acts on targets of AKT1, TNF, PTGS2, GASP3, MAPK8, JUN, GASP3 and other targets to inhibit inflammation through signaling pathways including TNF signaling pathway, IL-17 signaling pathway, Apoptosis, non-alcoholic fatty liver disease (NAFLD), etc.
The application of KMV model in China’s insurance market during the COVID-19
Authors: Zeng Zhisen , Zeng Huixian , Jiang Siqi
Published: March 2021

In 2020, the COVID-19 has a certain impact on the credit risk of China’s listed of insurance companies. This paper selects relevant data of four China’s listed insurance companies from the first quarter of 2019 to the third quarter of 2020, and then uses revised KMV model to measure the credit risk of these four insurance companies. The empirical results show that in the season of the outbreak, the default distance of China’s listed insurance companies has decreased to varying degrees, indicating that the epidemic has caused a temporary increase in the credit risk of the insurance industry.
Preliminary screening method of Escherichia coli in oral drugs by visual LAMP technology
Authors: Huang Xuchun , Zeng Chuanping , Niu Ling , Li Xiaotian , Chen Linzhu , Ma Guangqiang
Published: March 2021

According to Chinese Pharmacopoeia, Escherichia coli should not be detected in oral drugs. In this study, a visual LAMP method for rapid detection of Escherichia coli was developed to replace the traditional microbial limit test method. Methods Four specific primers (FIP, BiP, F3, B3) for loop mediated isothermal amplification were designed by using uidA gene of Escherichia coli, and calcein-Mn2+ dye was added to the system to establish a visual loop mediated isothermal amplification detection method for Escherichia coli Finally, the visual LAMP system was used to detect the presence of E.coli and the sensitivity of the system in drugs. Results The specificity of the optimized system was good, using this system to detect 10 different strains, the results showed that only Escherichia coli genome appeared, the system turned green, the other systems were brown yellow; the detection limit of gradient dilution Escherichia coli was 102 CFU/mL by LAMP. Visual LAMP was used to detect the oral drugs sold in the market and not passed the test of the drug administration, and no E.coli was detected, but the oral drugs that were artificially contaminated with E.coli were visualized by LAMP. The color detection limit of the system in oral drugs was 1.8×102 CFU/mL. Conclusion The visual LAMP detection system can be used for the preliminary detection of oral drugs containing Escherichia coli.
Research status and trends of soil pollution from 1999 to 2018
Authors: Dan Wu
Published: March 2021

In order to understand the global research status and development trend in the field of soil pollution remediation, this paper, based on the Web of Science (WOS) database, conducted a statistical analysis of the SCI papers in this field from 1999 to 2018 through bibliometric method, and quantitatively explored the development and change trend of the topic in this field.It was found that the number of papers published in the field of soil remediation in the world showed a linear growth trend with each year, while the number of papers published in China showed an exponential growth trend with each year, indicating that China pays more and more attention to this field.
Dust Monitoring and Processing System Based on Stepped Distributed Algorithm
Authors: Zhang Pei , Ma Xiaolin , Zhang Lihui , Guo Zeyu
Published: March 2021

With the rapid development of modern industry, productive dust is almost everywhere in factories, becoming a major hidden danger to industrial production safety. This project will realize real-time monitoring of factory dust, automatic dust removal, and human-computer interaction. Users can set the dust concentration threshold by themselves. The sensor will monitor the dust concentration in real time and upload the processed data to the cloud platform. If it exceeds the preset Threshold value, the nearby dust removal equipment is activated to remove dust in time. In this paper, for the monitoring and dust removal control of dust concentration in the air, the ladder distributed algorithm is used to save energy under the premise of achieving the dust removal function.
Evaluation and Recommendation System for Climate Migration Policy Based on Comprehensive Model
Authors: Yu Jiaqi
Published: March 2021

With the acceleration of industrialization and the rapid development of the global economy, carbon emissions are also increasing. With the global warming and rising sea levels, countless island nations are facing the risk of submerged land and residents on the island becoming EDPs. In order to provide new residences for EDPs, we will provide corresponding analysis recommendations.
Study on Adaptability of Different Asphalt Materials to Large Stone Porous Asphalt Mixture
Authors: Bao Qunqun , Chen Weidong , Liu Xiaoxia , Yang Fei
Published: March 2021

In order to explore the adaptability of different asphalt materials to the Large stone porous asphalt mixture, this paper respectively carried out four different binder technical indicators testing, lspm-30 mixture design and mixture performance testing. The research shows that rubber asphalt, SBS modified asphalt and MAC modified asphalt can be used as the binder of the Large stone porous asphalt mixture.
Research progress on indoor formaldehyde pollution and its influencing factors in China, a Review
Authors: Zhang Bin , Hu Xi , Zhang Yanyuan , Gao Yueyi , Wang Xiaoming , Jiang Jun , He Gangfeng , Chen Yan , Zhang Chunyan , Sun Jiajia , Wu Fei
Published: March 2021

China’s economic development accelerates the process of urbanization, accompanied by formaldehyde pollution in indoor environment. we summarized the recent research on the pollution and impact factor of indoor formaldehyde in China, and elaborated the shortcomings of the existing research and the future research direction from the perspective of source emission, environmental fate and human health effects.
Influence of Carbon Black on Aging Properties of Natural Rubber
Authors: Li Yi , Zhu Pengxiao , Wen Jun , Zhang Qiong , Yin Long
Published: March 2021

The influence of carbon black on the aging properties of NR was studied by adding different grades and contents of carbon black. The results show that the hardness, tensile strength and tear strength of NR increased with the increase of carbon black level and content, while the elongation at break and Akron abrasion decreased. After hot air accelerated aging and ultraviolet aging, the tensile strength, elongation at break and Akron abrasion of NR decreased, the tear strength first decreased and then increased, and the shore hardness gradually increased. With the increase of carbon black grade and quantity, the change rate of natural rubber aging properties, such as shore hardness, tensile strength, elongation at break, tear strength and Akron abrasion, became smaller and smaller.
Study on the evaporation characterization of dropwise water and DMMP in the plasma atmosphere
Authors: Xu Xinyan
Published: March 2021

Chemical warfare agents are extremely lethal. There has been a lot of related research conducted since World War II. This article takes dropwise water and DMMP (Dimethyl methylphosphonate, Sarin’s simulation reagent) as the research objects. By analyzing the data from the infrared band and visible light band, the evaporation features of water and DMMP in different plasma atmospheres (manipulated via setting different voltage and frequency). This work will, to a certain degree, provide experimental references for subsequent research on plasma decontamination of chemical warfare agents.
The Degradation Kinetics Model of Apricot during HA Drying
Authors: Yang Jiapeng , Yan Shengkun , Kong Na
Published: March 2021

The browning index and carotenoid studies were carried out durning HA drying process. The effect s different HA drying temperature(40 °C, 50 °C, 60 °C, 40 °C (10 h)→60 °C(end), 50 °C(10 h)→60 °C(end), 40 °C(10 h)→50 °C(10 h)→60 °C(end)) and air velocities(2 m/s, 3 m/s, 4 m/s) on colour and carotenoid of apricot were studied. Meanwhile a HA drying degradation model was established. The test showed that the BI value increased and carotenoid content reduced with the passing of the processing time during the drying process. The browning action durning the HA drying process was fit according to the zero and first-order reaction model. Furthermore, the activation energy was obtained by the Arrhenius equation, which was 17.59 kJ/mol. This research provided the theoretical basis for the quality control of dried apricot slice.
Based on Bibliometric Analysis of Saline Alkali Soil Improvement Technology Research Status and Hot Spot Analysis
Authors: Lu Nan , Li Gang , Luo Yuhu
Published: March 2021

Saline alkali soil is a common form of soil degradation. Soil salinization is an important factor restricting the sustainable development of agriculture in irrigated agricultural areas in the world. Soil salinization improvement materials and technologies have always been a research hotspot. Based on the data source of CNKI, through setting key search words and years, searching relevant literature and patents, using bibliometric method, and drawing and tabulating tools such as origin and excel, the data were statistically analyzed. The results showed that the literature related to saline alkali land improvement technology was first published in 1957, and then increased year by year. Ningxia University was the institution that publishes the largest number of related scientific and technological papers. Wei Kunfeng, from Dezhou saline alkali soil greening Research Institute of Shandong Province, was the researcher with the largest number of related scientific and technological papers. Most of them belong to the field of Engineering Technology (nature). Most of the papers were supported by National Natural Science Foundation, National Science and technology support plan and other national fund projects Ningxia Hui Autonomous Region holds the most published papers.
Effect of pH on the Interaction of Major Phenolic Compounds in Apple Juice with Gliadin
Authors: Xi Pushun , Zhu Danshi , Shen Yusi , Fu Hao , Cai Tian , Zhou Dayu , Liu He
Published: March 2021

The effect of interactions between polyphenolic substances (Chlorogenic acid, epicatechin and gallic acid) and gliadin under different pH (pH 3.8/7.0) were analyzed by fluorescence spectrum. The results showed that adding polyphenols could induce static fluorescence quenching of gliadin solution at pH 3.8 and 7.0. Fluorescence quenching spectrum of chlorogenic acid-gliadin complex at pH 3.8 presented a red shift toward long wave, while other phenols spectra showed blue shifts toward the short wave. The binding ability showed a significant difference between acid condition and neutral condition, and the quenching constants (Kq and KSV) of all three polyphenols at pH 3.8 were lager than pH 7.0. Compared to epicatechin and gallic acid, pH value had a marked effect on binding ability of chlorogenic acid with gliadin.
Effect of Sample Tilt on Indentation and Scratch Behavior of Single Crystal Copper
Authors: Zhong Yuexi , Li Mingda , Ji Bingkui
Published: March 2021

Inclined factors bring a lot of errors to indentation and scratch experiments. The aim of this paper is to investigate the effect of sample tilt on indentation and scratch behavior of single crystal copper. Angled indentation and scratching experiments were conducted on the flat of 5°,10°,15° and 30°, and spherical-conical indenter was used to study the effect. In scratching simulation with SPH method, normal and lateral forces during scratching process increased when tilt. Contrary to simulation result, when contact depth was held as a constant, the forces declined as tilt angle increased. In geometry model, the actual indentation depth was less than the theoretical contact depth and the projected area of the tilt indenter was an enclosed area like an elapse with two circular arcs. Residual impression images of indentation and scratching indicated that not only the sphere section of the tip of indenter, but also the conical surface penetrated into sample and squeezed a slope. The results showed that the size of spherical-conical indenter has significant effects on the size and shape of wear debris and could not be neglected during indentation and scratching tests with sample tilt.
Preparation and mechanical properties of powder metallurgy Ti-3Al-2.5V alloy
Authors: Zhu Wenyu , Lei Peng , Ma Guangyu , Cheng Tuo , Ivasishin O. M.
Published: March 2021

Using TiH2 powder, Al-V alloy powder and V powder as raw materials, Ti-3Al-2.5V alloy was prepared by ordinary pressing and vacuum sintering, and the structure and mechanical properties of the alloy were studied. The results show that the powder metallurgy Ti-3Al-2.5V alloy is a near-α type alloy, with a relative density of about 98%. The data of tensile strength, yield strength and elongation are more prominent, and the key performance reaches forged Ti -3Al-2.5V alloy level.
The Effect of Process Parameters on Stewed Beef
Authors: Cheng Xuexun , Liu Qiaoyu , Chen Haiguang , Huang Min , Wu Juxian , Luo Xingxie
Published: March 2021

To explore the application of stewing technique on the qualities and yields of stewed beef, the effect of process parameters, including solid-liquid ratio, time and temperature on the contents of major compounds, sensory ratings, color, PTA textural attributes and products yields were analyzed. The higher qualities was obtained when beef was stewed at 95°C, 150 min with solid-liquid ration 1:2.0, including high content of amino nitrogen and water-soluble protein, medium content of Nacl, high assessment about color and PTA texture, as well as the best sense.
Study on fatigue life model of “goose-neck” type slip ring
Authors: Liu Ming , Meng Lixin , Zhang Lizhong
Published: March 2021

In view of the problem that it is difficult to predict the fatigue life of the “goose-neck” type slip ring, through the analysis of the working principle and the movement force of the slip ring, it is found that the main failure mode of the slip ring is the FPC conductor layer fracture, the failure position is at the junction of the FPC (inner ring) and the FPC (goose-neck). The fatigue life prediction model of slip ring is established by energy method, the analysis of the model shows that the fatigue life of slip ring decreases with the increase of the rotation angle of the inner ring, the radius ratio of the slip ring inner ring to the slip ring outer ring and the thickness of FPC conductor layer.
Final Prediction of Product Quality in Batch Process based on Bidirectional Neural Network Algorithm
Authors: Li Wanshui , Wang Xiang , Feng Qianyuan
Published: March 2021

Based on the analysis of time series characteristics of production process based on common batch process end point quality prediction a predictive model based on bidirectional gated loop neural network is proposed to predict final product quality for unequal interval batch processes. Based on the requirement of forecasting value in actual production, loss function adapted to batch process is constructed, which makes model meet forecasting requirement under guarantee prediction precision, thus obtaining greater production benefit. Two-way gated loop (GRU) neural networks with different loss functions are compared with multi-directional partial least squares (MPLS) neural networks support vector regression SVR and gated cyclic unit neural networks. Results show that bidirectional gated loop neural networks have stronger applicability and higher accuracy.
Research Progress on Driving Factors of Species Diversity of Grassland Insects
Authors: Yang Long , Chen Chao
Published: March 2021

Insect species diversity is an important part of biodiversity in grassland ecosystems and a key link in the food chain. It plays an important role in maintaining the function and stability of grassland ecosystems. Studies have shown that grassland insect species diversity is closely related to grazing (strength, combination), climate (light, temperature, precipitation, atmosphere), plant diversity (type, height, coverage, biomass), but The specific mechanisms of grazing, climate, and plant diversity affecting grassland insect species diversity are not clear, especially how different grazing intensity and different grazing combinations drive insect diversity, and how specific grazing mechanisms affect insect species diversity have not been resolved. Moreover, there are few reports on the specific mechanisms of the effects of climate and plant diversity on insect species diversity. This paper collected and compiled 906 research papers on grassland insect species diversity and its driving factors at home and abroad, which is the future grassland insect species diversity. The research pointed out the direction and further explored the changes of grassland insect species diversity under the influence of grazing, climate, vegetation community and other driving factors in grassland ecosystem, and revealed for the first time the “grazing-plant-soil-grass insects” in grassland ecosystems. The interaction between the two.
Graphene@activated carbon modified electrode for electrochemical behavior analysis of quercetin
Authors: Wan Guan , Dong Longyun
Published: March 2021

In this paper, graphene (Gr) and coconut shell activated carbon (AC) modified electrode was developed for electrochemical behavior analysis of quercetin. Porous AC was prepared from coconut shell. The Gr was obtained by electrodeposition of graphite oxide on AC surface. The electrochemical behavior of quercetin was analyzed by Gr@AC electrode, and results show that the detection range of quercetin is 6 μmol/L to 100 μmol/L (R2=0.9977). The detection limit (LOD) is 0.5 nmol/L (3σ/slope), and the recommended method has a good recovery for the detection of quercetin in real urine.
Study on Natural Ventilation Potential of Ordinary Office Buildings in Guangzhou Based on Architectural Factors
Authors: He Chundian , Zhang Yufeng
Published: March 2021

As a traditional architectural design technology, natural ventilation has the functions of improving thermal comfort, indoor air quality and energy saving, which is in line with the architectural development concept of green and healthy buildings.Guangzhou is located in the hot-humid area of Lingnan, where is rich in wind resources and attaches great importance to the natural ventilation of buildings. Natural ventilation potential (NVP) are evaluation indexes that can effectively assist and optimize the natural ventilation design of buildings. With abundant relevant studies at home and abroad, various NVP evaluation indexes and calculation methods have been proposed, and strategies for natural ventilation design of buildings in different regions have also been given. Based on the parametric building performance simulation platform, this paper introduces s new NVP evaluation method to carry out parametric simulation research on the ordinary office buildings suitable for natural ventilation in Guangzhou. The results showed that the main factors that limit the NVP of ordinary office buildings in Guangzhou is condensation in summer, and low building density, building toward southwest, high glazing ratio or cross ventilation will bring about high NVP. Meanwhile there is an optimal value for the thermal resistance of the roof, and the greater the thermal storage coefficient of the main material, the greater the night natural ventilation potential.
Study on microbial corrosion inhibition of carbon steel in circulating cooling water system
Authors: Yang Yan , Li Jiayi , Gu Qiyuan , Yuan Xuetao
Published: March 2021

Although the industrial circulating cooling water system can save a lot of water resources, there will be serious scaling and corrosion during operation. Based on the environmental friendliness of microbial corrosion inhibition technology, this work evaluated the influence of microbial environmental indicators on the corrosion rate of carbon steel in circulating cooling water system by full factor experimental design. The results showed that under 10-50 mg/L ammonia nitrogen, 1-3 L/min aeration fluxes, the corrosion rate getting lower with the increase of ammonia nitrogen concentration and the decrease of aeration rate, while the microbial content had little effect on the corrosion rate.
Problems and countermeasures of financial accounting transforming to management accounting
Authors: Jiang Xiaoyu
Published: March 2021

With the rapid development of the economy and the change of various information technology products, China’s economy has entered a stage of transformation. In such an era of opportunities and challenges, traditional financial accounting can no longer meet the needs of modern enterprise survival and development, the fierce market competition and the needs of the company’s own development are all driving the main functions of corporate financial reporting from recording the past to predicting the future. In order to further improve the efficiency of enterprise operations, promote the transformation of financial accounting to management accounting is imperative. Under the premise of expounding the theoretical basis of financial accounting and management accounting, this paper analyzes the problems in the transition and proposes the countermeasures at the same time. Promoting the transformation of financial accounting to management accounting, and give full play to the role of management accounting in improving value-added in business management.
Bridge Expansion Joints Cleaning Device Based on Design of Temporary Deceleration Belt
Authors: Chen Yijing , Hao Ziyi , Zhang Jiankang
Published: March 2021

The bridge expansion joints are an important structure of bridges, and its cleaning work is also important. The common way of cleaning is manual cleaning now, which has low cleaning efficiency and will bring obstacles to the traffic. Therefore, we propose a bridge expansion joints cleaning device which imitates the design of temporary deceleration belt. The innovative design of temporary deceleration belt slide can be laid on the expansion joint. The cleaning tools can move to a position through the slide rail, and the internal design of water cannons is used for flushing, so as to achieve an efficient cleaning of expansion joints without affecting transportation.
The Collaborative design of rural Morphology reconstruction and paddy rice flower co-production Environment
Authors: Yao Wang
Published: March 2021

A rural environment is one that has been transformed by man, during the process of transformation; rural morphology is influenced by crop type, agricultural production mode and cultural morphology. After that the research on human-land relationship in the field of architectural planning gradually turn to the analysis of spatial forms such as landscape and topography, and ignore the influence of crop types, production modes and cultural forms. Co-cultivation of rice flower achieves the maximum and most reasonable utilization of environmental resources and tourism intervention to obtain sustainable benefits within the limited time and space. It is an important basis for promoting the transformation of rural form, the inheritance of cultural form, and the collaborative design of rural natural environment.
Effects of Biminkang mixture on AQP5 level in allergic rhinitis rats
Authors: Du Qixue , Wang Renzhong
Published: March 2021

Objective To observe the effect of Biminkang mixture on allergic symptoms and AQP5 level in allergic rhinitis rats. Methods Sixty SD rats were randomly divided into six groups: control group, model group, western medicine group and low, middle and high dose of TCM group. All rats in the treatment group were established AR model. After modeling, corresponding drugs were given for 14 days. At the same time, each TCM group were treated with semiconductor laser. Two weeks later, observing the symptoms of allergic rhinitis rats. The expression level of AQP5 was detected also. Results At the end of treatment, the symptoms in each treatment group were significantly reduced compared with the model group. The effect of middle and high dose of TCM group and western medicine group was better than that of TCM group in low dose (P<0.050. The expression of AQP5 in the model group was significantly higher than that in the control group (P<0.01). Desloratadine tablets and Biminkang mixture could significantly reduce the expression of AQP5, which was statistically significant compared with the model group(P<0.01). Conclusion Biminkang mixture can effectively alleviate the nasal symptoms of allergic rhinitis rats, its main role is to reduce eosinophil proliferation, inhibit the expression of AQP5, so as to reduce the secretion of nasal mucosa glands, reduce the nasal irritation performance, which is worthy of further clinical application.
Study on the Photocatalytic Performance of Modified TiO2
Authors: Fu Dan
Published: March 2021

In this study, the modified TiO2 was prepared by sol-gel and calcination method and the photocatalytic performance was studied by treating Methylene Blue simulated wastewater.The influence of the TiO2 dosage and time, modified method of TiO2, calcination temperature and calcination time on photocatalytic performance were examined.The FTIR of pure TiO2 was tested. The results of FTIR showed that the bending and stretching vibration peaks of hydroxyl and O-Ti-O structure of TiO2 were detected.The study indicates that modified TiO2 is beneficial to the treatment of dye wastewater.
Effects of pouring temperature and electromagnetic stirring on semi-solid microstructure of hypoeutectic Mg2Si/Al composite
Authors: Si Yi , Di Wanshan , Liu Miao , Zhao Yuexiang
Published: March 2021

In this paper, hypoeutectic Al-Si matrix composite reinforced by 5wt. % Mg2 Si were prepared under different pouring temperature (superheat) and electromagnetic stirring (EMS), and the effects of pouring temperature and EMS on the morphology a nd size distribution of primary α-Al, (α-Al+Mg2Si) eutectic cell and eutectic Mg2Si are investigated. The experimental results show that the low superheat + EMS process not only refines the grain structure of the primary α-Al and (α-Al+Mg2Si) eutectic cell, an d promotes the formation of more non-dendritic structure of the phases, but also refine s the eutectic Mg2Si and changes the nucleation mode of (α-Al+Mg2Si) binary eutectic from the nucleation on primary α-Al under conventional casting to the one on nuclean t particles in the interdendritic liquid under low superheat + EMS.
The Soil Heavy Metals Content and Distribution of Jiujiang City
Authors: Shi Minghao
Published: March 2021

Soil pollution is serious now worldwide especially in China, with the continuous expansion of industrialization, the problem of soil heavy metal pollution is becoming more and more serious which is toxic to human beings. We studied the content and distribution of Cu, Zn, Pb, Cr, and Cd in soil of Jiujiang city. The results showed that the content of Cr and Zn were higher than others and the content of Cd was the lowest. Meanwhile, the content of the same heavy metal element has no significant difference between samples in different depth of the sampling point as our studied.
Construction technology of static bolt-pile reinforcement with pressure grouting combined with galvanizing steel pipe based on computational science
Authors: Wu Meiqiong
Published: March 2021

Combined with practical engineering experience, this paper summarizes the construction technology of static bolt-pile reinforcement with pressure grouting combined with galvanizing steel pipe, which can be used for the reinforcement of multi-layer industrial and civil building foundation, and has great value of popularization and application prospect.
Urban land use simulation based on ProWSyn-MLP-CA
Authors: Chen Sinan , Liu Minghao , Liu Tianlin , Li Junyi
Published: March 2021

In the field of urban dynamic simulation, scholars are committed to exploring different models and methods to improve simulation accuracy. However, while the overall accuracy is improved, the imbalance of data results in relatively low accuracy of minority samples. How to improve the simulation accuracy of minority samples has become an important issue. This paper will solve this problem at the sampling level. The experiment is based on the GlobeLand30 land use data in the three phases of 2000, 2010, and 2020, and uses the ProWSyn (Proximity Weighted Synthetic Oversampling Technique) algorithm to balance the data. Train the model with land use data from 2000 to 2010, verify the model with data from 2010 to 2020, and finally simulate the future based on data from 2020. The results show that the ProWSyn-MLP-CA model constructed in this paper has improved the accuracy of minority samples to varying degrees. In the case of using the same neural network model, the KAPPA value of a small number of land types increased by an average of 30% after ProWSyn equalization.
3-Dimensional Anisotropic Split Resonant Cavity
Authors: Liu Jiancheng
Published: March 2021

An innovative 3-Dimensional split resonant cavity (SRC) is introduced here as an enhancement of planar split-ring resonators (SRRs), which could overcome the strong dependence of SRRs on polarization. Numerical simulations demonstrate that multiple resonances, including electric dipole mode, magnetic dipole mode and interaction of both modes, can be excited by three different polarized incident electromagnetic (EM) waves. Fano resonance characterized by asymmetric transmission line shape due to interference of multiple modes is observed in the simulation.
Simulation of Steam-flooding Thermal Heavy Oil Recovery Process with Sequential Implicit Method
Authors: Ping Zixin , Yue Mengchen , Wang Min , Wang Xiaohong
Published: March 2021

Numerical simulation of steam-flooding thermal heavy oil recovery is studied in this paper. Although the traditional full implicit scheme has high stability, it needs to calculate the huge sparse matrix and the computation cost is super expensive; so it cannot meet the needs of practical oil industry production. In this paper, sequential implicit scheme is applied to numerical computation of steam-flooding thermal heavy oil recovery. A quasi-one-dimension numerical example is tested to verify the validity and high efficiency of the proposed method against using traditional fully implicit scheme.
A finite element method based on modified Alonso unsaturated soil constitutive model
Authors: Chi Zecheng , Meng Zhaowei , Xie Linyu , Wang Wei , Zhang Weipeng
Published: March 2021

Based on the revised ALONSO model, combined with the ABAQUS software platform, this paper compiled the USDFLD subroutine and obtained the stress-strain curve and the axial strain-volume deformation by simulating the triaxial shear test of the unsaturated soil to control the suction and confining pressure. The curve verifies the accuracy and reliability of the algorithm. The research results show that: (1) When the suction is the same, the higher the confining pressure is, the higher the yield point of the soil sample is. According to the comparison between experiment and simulation, the modified Alonso model can reflect the nonlinearity of the stress-strain relationship of the reshaped unsaturated soil sample and its plastic flow characteristics; (2) Compared with saturated soil, unsaturated soil has a higher yield point as a result of the suction. And the larger the suction is, the higher the yield point is, which proves that the model can simulate the influence of unsaturated soil liquid relative to the solid phase.
Dynamic Monitoring Technology of Air Quantity in Mine Ventilation System Based on Optimum Location of Wind Speed Sensors
Authors: Si Junhong , Wang Xinru , Wang Yiqiao , Li Lin
Published: March 2021

To improve the accuracy and reduce the disturbance during the monitoring, the index system and the mathematic model of optimal wind speed sensors’ location are established using the variable fuzzy theory. Then the adjustment analysis of redundant wind speed sensor measurement and the standard deviation filter method are put forward. Then, the dynamic monitoring technology in mine ventilation network is formed and the automatic monitoring system of air quantity in mine ventilation network is established. The application in a complex ventilation network shows that, this method only needs 10 wind speed sensors (7 must install points and 3 redundant install points) to obtain the air quantity of 19 branches. And it can achieve the dynamic monitoring in the underground roadway, which provides an important basic data for management decisions in mine ventilation network.
Reservoir characteristics analysis of Upper Paleozoic Permian He 8 formation in Qingyang area
Authors: Li Zhenhua , Zhang Suya , Hu Xiaoting
Published: March 2021

Through field geological survey, combined with outcrop and drilling data, the reservoir characteristics of Upper Paleozoic Permian He 8 formation in Qingyang area are comprehensively analyzed. The results show that the He 8 formation in Qingyang area is mainly composed of medium and coarse grains. The reservoir porosity is 5% ∼ 14%, and the permeability is 0.05×10−3um2 ∼ 0.7×10−3um2. The study on reservoir characteristics of He 8 formation is not only of great geological significance, but also provides important data for oil and gas exploration in Qingyang area.
A thematic analysis of barriers to mental health help-seeking: a multi-cultural perspective
Authors: Yi Gu Hui , Gao Ran , Li He Hui
Published: March 2021

There are increasing overseas students suffering from mental problems. However, less students will seek help from mental services. This study is to explore the potential barriers of seeking help. Results identified 3 clearly-defined and well-supported themes of barriers to help-seeking (i.e. stigma, mental health literacy and awareness of services, culture and language). This study raises important public health issues as well as gaining an insight into how cultural barriers influence help-seeking behaviour, raising potentially fascinating further avenues for future study.
Finite element simulation and analysis of hydration heat in large-volume pile caps
Authors: Liu Guoshan , Yu Xiangkun , Zhu Ronghao , Dong Xu
Published: March 2021

To reveal influences of hydration heat in large-volume concrete, a large-volume concrete pile cap of a main bridge over a canal was taken as the engineering background. In the research, the finite element software, Madis civil, was used for simulation and analysis of hydration heat in the pile cap. Through finite element simulation, the temperature and stress fields were obtained and compared with the monitored data. Analysis results indicate that in the initial pouring stage of the pile cap, a large temperature difference occurs between the interior and surface of the pile cap; as the temperature difference enlarges, the temperature stress of the pile cap also increases correspondingly. The results of finite element analysis match well with the monitored data, which guarantees the construction quality in the field and verifies feasibility of the finite element software in simulation and analysis of hydration heat.
Response Characteristics of Carbon and Nitrogen Content of Newly Added Cultivated Land to Slope
Authors: Guo Zhen , Sun Xiaomei
Published: March 2021

Research on soil erosion during the construction of newly added cultivated land in mountainous areas can not only ensure the stability of newly added land, but also play an extremely important role in achieving environmental friendliness. After planting soybeans, the SOC content was lower than that of corn planting. Among them, the SOC of the 2° test field was reduced by 13.81%, the 3° test field was reduced by 16.69%, and the 5° test field was reduced by 2.94%. Compared with corn planting, the TN content of the soybean test field was reduced, among which the 2° test field decreased by 3.51%, the 3° test field decreased by 14.86%, and the 5° test field decreased by 4.69%. The cumulative effect of carbon and nitrogen content in the 3° experimental field under the corn planting mode was better.
Research on the Construction Technology of Tunnel Internal Air Circulation Purification under High-Quality Air Quality
Authors: Li Kun , Ren Xianghong
Published: March 2021

As the traffic volume increases, the air quality in the tunnel decreases. In order to ensure the health of the tunnel staff and the safety of tunnel operation, and to better play the role of the duty room in the tunnel, through the test and analysis of the tunnel ventilation and environment, it is proposed to take the air in the tunnel and circulate the purification and the roots blower to send and exhaust air. The design scheme combining methods effectively solves the design problems of small air volume and high air pressure of the air purification system in the tunnel, and has reference significance for the safe operation of similar long road tunnels.
Interpretation of the Status Quo of Domestic Ecological Environment Quality Based on Remote Sensing Technology
Authors: Li Yanan
Published: March 2021

Using CNKI’s full-text database of Chinese journals as the data source, we will discuss the inter-annual changes, main research forces, funding funds, high-frequency keywords and development context of the ecological environment quality research field in my country based on remote sensing technology. The results show that: from the perspective of the inter-annual changes in the literature, the number of papers published on the ecological environment quality in my country has shown a significant upward trend, and it has developed rapidly in recent years; from the perspective of research strength, Beijing Forestry University has the highest total citation frequency, whether it is the number of papers or the number of citations. The frequency indicates that universities have a relatively high level of scientific research in this field as a whole; from the perspective of fund funding, the research on ecological environment quality has attracted great attention from the national and local levels.
Interfacial transition zone characteristics of recycled concrete: A review
Authors: Zhang Yichao , Chen Xingyi , Zhou Jinghai , Huang Jian , Wang Qinghe
Published: March 2021

China and other developing countries are the largest consumers of concrete. The massive use of concrete consumes natural resources and produces construction waste, which leads to the shortage of landfill sites. Using recycled aggregate to prepare concrete cannot only meet the performance requirements of natural aggregate concrete, but also solve the problem of insufficient landfill site, which is in line with the essence of sustainable development. However, the interfacial transition zone is often the weak area of recycled concrete, which is the focus of current research. This paper summarizes the mechanical properties of recycled concrete ITZ, studies the existing problems, and looks forward to the future development trend.
Practical Exploration of New Urbanization in China—A Case Study of Shichuan River (urban section) Comprehensive Improvement Project
Authors: Yi Hu , Pei Sun
Published: March 2021

The “New Urbanization” strategy is an important practice of development of New Era Socialism with Chinese Characteristics, a key action of constructing a modern nation, and a powerful support of implementing the strategy of rural revitalization and regional coordinated development. This study explored the land comprehensive development mode and watercourse treatment engineering technology during urbanization using comprehensive improvement project of Shichuan River (urban section) as an example. Under the actual situation of an increasingly dense population and more stringent resource and environment regulation, new urbanization in the future should aim at a “resource-saving and environment-friendly” society and treat urbanization at the county level as an important step of future urbanization in China.
Study on spray cooling of heading face based on DPM model
Authors: Li Chen , Zhang Haoyue , Sun Luna , Yang Tianmo , Zhang Teng , Zhang Haonan
Published: March 2021

In order to study the treatment of mine heat disaster and ensure the protection of the health of the staff in the heading face. In this study, a physical model was built based on the heading face of a metal mine, and the temperature field distribution of the roadway was simulated by computational fluid dynamics (CFD) software. The results show that spraying can significantly reduce the temperature of the roadway environment. This paper provides theoretical guidance for the application of spray device in underground mines.
Research on Corrosion Management Technology of Petroleum Pipeline and Pressure Vessel
Authors: Wan Zejun , Yang Jun
Published: March 2021

At present, the corrosion management of the upper module pressure vessel and pressure pipeline of the fixed oil production platform and the floating production oil storage and unloading platform lacks localized corrosion rate knowledge base, corrosion mechanism knowledge base and inspection case knowledge base, resulting in low accuracy of evaluation results and the foundation of integrity management is weak. Based on this background, the paper discusses the leading causes of the corrosion process and studies and analyses the primary mechanism. Through careful consideration of pressure vessel design, material selection, manufacturing, coating and slow release and other factors, combined with different corrosion mechanisms, a comprehensive analysis of the corrosion protection of pressure vessels is carried out to find the best method of corrosion protection and corrosion control to ensure Pressure vessels operate safely and typically in petrochemical production.