bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence factors analysis of ionized field characteristics of Zhangbei ±500kV flexible direct current transmission lines
Authors: Zhang Jinlan , Zhao Yuan , Hu Yinghong , Ji Yirun , Lu Yi
Published: January 2021

The ionized field should be controlled in order to insure the environmental friendliness of high voltage direct current (HVDC) transmission lines. Different with traditional HVDC transmission lines, the metal return lines is first employed in Zhangbei ±500kV flexible HVDC lines. In this paper, the characteristics of ionized field with and without metal return lines are calculated on the basis of numerical method with Deutsch’s assumption. The influence factors, i.e. roughness coefficient, distance between metal return line and height of the metal return line, are analysed in detail. The results show that the metal return lines will have a shield effect on the ionized field on the ground. The distribution of ionized field is nearly independent on the height of metal return line. The shielding effect of the metal return line mainly contributes to the projection position of the metal return line. The presented results can give instructions for the design and control of the ionized field level of flexible HVDC lines with metal return lines.
Decentralized control of robot joints based on neural network observer
Authors: Pan Yuedou , Cai Guoqing
Published: January 2021

In actual work, the system parameters of the robot joints will change in real time or cannot be measured, and the coupling relationship between the various subsystems and the existence of modeling errors make the system model difficult to determine. Based on such problems, a neural network observation is proposed Decentralized control method for robot joints of the robot. In the actual control of the manipulator, firstly, the model of each joint subsystem is established by the decentralized control theory, and the nonlinear function approximation ability of the neural network is used to approach the uncertain part of the manipulator subsystem online through input and output data. The design observer can estimate the state of the system, and use the estimated state to design a sliding mode controller to dynamically estimate and compensate the unknown model dynamics of each independent joint, and realize the self-control of the system when the speed information and model information are unknown. Adaptive control greatly enhances the robustness and adaptability of the robotic arm system. Finally, the stability criterion of the neural network observer and the sliding mode controller is given by the Lyapunov function method, and the simulation results prove the effectiveness of the design method.
Study on Sound Field Distribution Rule for Tank Structures of Large Oil-immersed Transformers
Authors: Yuchao Ma , Juan Mo , Jinshan Yu , Xiang Li , Zhongyuan Zheng
Published: January 2021

Large oil-immersed transformers are an important part of the transmission and distribution network in power systems. Power transformers are the main noise source of substations. Because of the uneven manufacturing process, aging equipment, long-term operation, and close distance from sensitive points, the problem of transformer noise pollution has become increasingly prominent. In this paper, the transmission and analysis model is established for transformer sound waves on the interface between insulating oil and tank body according to the sound wave propagation rule in complicated medium, and the simplified acoustic simulation model is constructed for large oil-immersed transformers by simulating the vibration noise of transformer core with monopole sound source, with which, the sound field distribution rule inside and outside the transformer tank structure is obtained, and finally, the influence factors for noise distribution are given. The results of the study provide control basis for reducing transformer noise.
Determination of two acrylates in environmental water by high performance liquid chromatography
Authors: Qiu Yue , Zhang Qing , Li Genrong , Gong Yingkun , Long Mei
Published: January 2021

A high performance liquid chromatography (HPLC) method was established for the determination of two acrylate substances in environmental water. The optimal chromatographic conditions were determined via exploring the effects of chromatographic column, mobile phase, column temperature, flow rate, detection wavelength and other factors on the separation effect of acrylate substances. Finally, the effective separation of methyl methacrylate and isopropyl methacrylate was realized within 6 min. The retention time of the target compound was used for qualitative analysis and the external standard method was used for quantitative analysis in the experiment. The linear relationship between the two acrylates was good in the range of 0.2-50.0 mg/L, and the correlation coefficient of standard curve was higher than 0.999. The recovery rate was 88.6%-105.3%, the relative standard deviation was 1.7%-4.1%, and the detection limit (LODs) was 0.03-0.05 mg/L. The method was simple, efficient and accurate, and suitable for the determination of acrylates in environmental water samples.
A new meta-heuristic for economic dispatch of integrated energy system with multi-type energy storages
Authors: Liang Tao , Yin Xiaodong , Ge Qun
Published: January 2021

Dispatch optimization of the integrated energy system with multi-type energy storages, as an essential issue to optimum energy management, is a high-dimensional complex nonlinear problem with time-series constraints. To overcome the problem, a new meta-heuristic method is presented in this paper. The proposed method introduces several heuristic rules, called as maximum storage utilization heuristic rules, and embeds them into an adaptive GA to improve the quality of initial feasible solutions and new solutions in each iteration. In contrast to existing methods, the new method guarantees the convergence to an optimal solution with low computational cost. Simulation results indicate that the proposed method provides excellent performance in solving economic dispatch of integrated energy system with multi-type energy storages.
Decomposition of xylene in strong ionization non-thermal plasma at atmospheric pressure
Authors: Jia Yuan , Yi Chengwu , Yi Rongjie , Jiang Miao , Zhang Baolin , Zhang Qi
Published: January 2021

A large amount of volatile organic compounds (VOCs) produced by industry have caused serious environmental pollution. In this paper, the removal effect of simulated xylene by strong ionization dielectric barrier discharge (DBD) plasma at atmospheric pressure and its degradation mechanism and pathway were studied. The effect of gas residence time, and initial xylene concentration was studied. The results showed that higher voltage caused an increase in discharge power, and with the increase of voltage, the concentration of ozone and nitrogen oxide in the reactor increased. The degradation efficiency decreased from 98.1% to 80.2% when xylene concentration increased from 50 ppm to 550 ppm at 4kV. And with the increase of residence time from 0.301s to 1s, the degradation efficiency increased from 78.5% to 98.6%. According to GC-MS analysis, the degradation products were ethyl acetate and n-hexylmethylamine at 4kv. And the main intermediates are 2,4-2-tert-butylphenol, 2-aminopentane, 2-methyl-5 - (2-aminopropyl) - phenol and propionamide at 1.5kV.
Soil - Water Loss and Measures Measure composition of Overhead Power Transmission Lines in Hilly area
Authors: Chunxia YANG , Xiaofeng CHEN , Li LI , Xi Chen , Jia HU , Qian HONG
Published: January 2021

The disturbance characteristics of power transmission line projects are long distance, scattered disturbances, large differences in natural conditions, and diverse types and strengths of soil erosion. These two points are the key to soil and water conservation, Including that identifying the main controlling factors of soil erosion in each construction disturbance area, and adapting measures to local conditions, and setting up water and soil conservation measures for disasters are power transmission lines in hilly areas. This paper took a specific project as an example, analyzed and evaluated the characteristics of water and soil erosion in the project and optimizes the configuration of measures, in order to provide a reference for the arrangement of water and soil conservation measures in the construction of similar projects.
Influence of Machine-Made Sand Performance on Concrete
Authors: Hou Huanhuan
Published: January 2021

This paper studied the influence of various performance indexes of machine-made sand on concrete work performance and admixture adaptability. The experimental results show: The MB value of machine-made sand has obvious negative effects on concrete performance and admixtures. The rock-powder content and the fineness module have relatively little influence on the working performance of concrete. The negative effect can also be reduced by adjusting the sand ratio, but the amount of external additives has a certain influence.
A study on the electrolyte circulation effect of Mg-air battery
Authors: Park Jongwoo , Jang Kwangyeop , Seo Sangwon , Park Jaehyo , Kwon Wansung , Kim Dongjin
Published: January 2021

The theoretical discharge energy density of the Mg-Air battery, which is attracting attention as a next-generation battery, was modelled and the efficiency of electrolyte circulation was compared. After that, 180kWh class power facility was built using Mg-Air batteries, and the effect of electrolyte removal according to the circulation method was compared and investigated.
Analysis of Fouling Characteristics of Diatomite Ceramic Membrane Using Filtration Models
Authors: Yanqing YANG , Yan QIU , Yanhui LIU , Yan ZHAO , jing LI , yubo ZHANG
Published: January 2021

Ceramic membrane has made rapid progress in industrial/municipal wastewater treatment and drinking water treatment owing to its advantageous properties over conventional polymeric membrane. The ceramic membrane processes are a rapidly emerging technology for water treatment, yet virtually no information on the performance and fouling mechanisms diatomite ceramic membrane. In this study, filtration experiments were carried out using a mixture of humic acid and kaolin which simulated surface water under constant pressure to reveal fouling characteristics of the filtration of the diatomite ceramic membrane. The results showed that the removal rate of VU254 was 52%~70%, and turbidity was 90%~95% when treat mixed water of 5-10mg/L kaolin and humic acid. And membrane surface retention and membrane pore adsorption were the mainly removal routes. And the flux slowly decreases, rapidly decreases, gradually decreases and stabilizes were three processes of diatomite ceramic membrane fouling. And the first and third stages of membrane fouling mainly caused by complete blocking, and the second stage was mainly controlled by standard blocking. The study found that humic acid would cause both the pore blocking and the fouling of the membrane surface when turbidity was present, especially the membrane surface pollution, it was the major factor of diatomite ceramic membrane fouling.
Calculation of 220kV Transformer Bias Current Based on the Earth and Power Grid Model in the Metro Area
Authors: Chen Lu , Wang Longfei , Huang Hua , Liu Chunming , Wu Tianyi , Su Lei , Zhao Dandan
Published: January 2021

The metro stray current will be generated during subway operation, which will affect the electromagnetic environment near the subway, and then affect the surrounding 220kV transformer. In order to analyze the influence of stray current on the DC bias of the transformer, this paper calculates the magnitude of the stray current through the resistance network model, and then analyzes the changes in the surrounding ground potential caused by the stray current based on the earth resistivity model. Finally, the 220kV transformer network topology model of the city network was established, and the relationship between the neutral point current of the transformer and time was obtained. It provided a quantitative method for research the correlation between subway stray current and 220kV transformer bias current phenomenon and calculate the bias current of 220kV transformer in urban network near subway.
Calculation and Analysis of Effective Utilization Coefficients of Farmland Irrigation Water in Guizhou Province
Authors: Wu Haikuan , An Meiyun , Cai Changjun
Published: January 2021

Effective utilization coefficient of farmland irrigation water is an important index for water-saving level evaluation. Tracked calculation of effective utilization coefficients of farmland irrigation water as well as quantitative and qualitative analyses in terms of its scientificity and rationality have a guiding role in sustainable development of water-saving irrigation. This paper sets out to calculate the effective utilization coefficients of farmland irrigation water in Guizhou Province in 2019 and evaluate rationality of the results. More than that, some internal factors influencing utilization coefficients are also investigated, and relevant proposals are put forward, in a view to providing technical support for water-saving irrigation planning and scientific water distribution.
The effect of slenderness ratio on water entry
Authors: Fan Chunyong , Li Zengliang , Du Mingchao
Published: January 2021

In the paper, the air cavity created by vertical water entry of cylinders with different slenderness ratio (defined as “s=L/D”) is investigated experimentally, theoretically, and computationally. The study is focused on the range of Froude numbers,Fr=V/(gr) 0.5, (12<Fr<30). Particular attention is given to the effect of slenderness ratios on the surface seal time, the evolution process of the cavities. To understand the water entry physical processes, we conduct several experiments of water entry of different length cylinders. A theory model considering the added mass (induced by the water motion), buoyancy force, gravity, and water-resisting force is developed to predict the relationship between the falling distance and evolution time. Studies show that for the same size bullet the surface seal time of the cavity decreases with the increase of impact speed. Under the identical impact speed, the cavity seal time decreases with the increase of the slenderness ratio. For the consistent impact speed, with the value of “s” increase, the falling distance increase (the same moment). The falling distance captured by the developed theoretical model match with the experimental and numerical data.
Study on water saving strategy of students' dormitory in Chifeng University
Authors: Yang Yuchen , Zhang Yaxin , Wang Qian , Li Xiaowei , Shuai Ying , Han Zixuan , Li Qiang , Zhang Kunpeng
Published: January 2021

In order to solve the problem of waste of living water in Chifeng College Students' dormitory, the actual situation of water consumption in student dormitory was investigated. This paper analyzes the potential of water-saving and water-saving technology and strategy of Chifeng College, and finds out the water-saving mode suitable for the dormitory of Chifeng College. On this basis, the research on the application of reclaimed water treatment technology and the construction of reclaimed water treatment station in Chifeng university is carried out. This study provides theoretical and experimental support for solving the problem of water-saving in Chifeng College.
Study on Application of TiO2 Photocatalytic Materials in Purification of Highway Tunnel Tail Gas
Authors: Liu Zhiqiang , Jiang Haifeng , Yuan Minmin
Published: January 2021

In recent years, with the continuous expansion of the scale of highway tunnels in China, the problem of tail gas pollution in highway tunnels has become increasingly prominent. The tunnel is a long and narrow space, which makes air pollutants easy to accumulate and difficult to diffuse. In this paper, the present situation and application scenarios of TiO2 photocatalytic materials in the purification technology of highway tunnel exhaust gas are studied and analyzed, and the nano TiO2 photocatalytic materials which can be applied to highway tunnels, corresponding highway stations and their affiliated facilities are put forward, so as to greatly degrade automobile exhaust gas, atmospheric chemical pollution and environmental biological pollution.
Analysis on Structure of Interacted and Interconnected Micro Grid Based Energy Internet on Pelagic Clustering Islands
Authors: Hou Ting-ting , Chen Zhu , Zou Yu-xin , Heng DingDing Heng , Fang Reng-cun , Lei He , Yang Dong-jun , Sang Zi-xia
Published: January 2021

Compared with the direct access to the main power grid and diesel generators, this paper puts forward the scheme of using electric ships to shuttle between islands to transport electric energy, analyzes the limitations and defects of its application in offshore islands; and then puts forward a comprehensive energy supply system of offshore islands. The comprehensive energy supply system can make full use of the rich renewable energy of the islands, and realize the optimal allocation of the overall resources of the islands. At the same time, the energy supply system can break the isolated development pattern of island power grid and connect the island group power exchange ship. This paper analyzes the connotation and characteristics of the system, puts forward the key technology for building the integrated energy supply system of ocean island group, and gives the design and operation analysis example of power exchange ship.
Research and Application of Noise Barriers in Highway Construction
Authors: Sun Lijun , Zhao Yucheng , Zhang Jia , Chen Dongqin , Zhang Xiangfeng
Published: January 2021

In recent years, with the rapid development of highways, traffic noise has become a risk source in the environment, and noise control has attracted wide attention. As an economical and effective method, highway noise barriers were the best way to reduce traffic noise and protect residents’ acoustic environment. At the same time, considering the various surroundings in selecting suitable materials (sound-reflective or sound-absorbing materials), types (such as concrete, organic glass, foam metal and photovoltaic noise barriers) and structures (such as vertical, T-shaped, Y-shaped, and inverted L-shaped) could greatly improve the sound reduction performance of barriers. This paper summarizes the current development of noise barriers from perspectives of the material, type and structure to introduce a variety of noise barriers and provides a reference for relevant research. With these analyses, it is possible to design more cost-effective and appropriate noise barriers for particular areas.
Research on the Establishment of Carbon Emission Management Model Based on the Construction Process-Taking a Stadium for the 2022 Beijing Winter Olympic Games as an Example
Authors: Xu Bin , Feng Tianyuan , Yi Wenting
Published: January 2021

At present, there are few systematic studies on carbon emission management of construction projects, which can no longer meet the requirements of carbon emission management of the construction of stadiums for Winter Olympics. This paper, taking a stadium for Winter Olympics as an example, discusses the boundaries, scenario setting and accounting methods of carbon emissions in the construction process. And then, we construct the management model and management system of carbon emissions. In this case, the monitoring and collection of carbon emissions and carbon emission reduction measures will be promoted to efficiently finalize the carbon emission pipes for the construction of Winter Olympics stadiums. The management model, technical measures and management system of carbon emissions suitable for Winter Olympics stadiums developed in this research can be further studied and widely applied to carbon emission management in the construction process of various public buildings.
Research on Mechanical Properties of Nano-modified Epoxy Resin Color Anti-skid pavement Materials
Authors: Zhong Yongqiang
Published: January 2021

By referring to the domestic and foreign researches on color anti-skid pavement, the composition of epoxy resin coating material for color antiskid pavement is designed. The purpose of the experiment is to analyze the effect of nano-modified epoxy resin coating by adding 2.5% nano-organic montmorillonite modifier to the existing color anti-skid pavement surface material. Test and compare the change of mechanical properties of nano-modified epoxy resin coating binder before and after nano-modified. Then the effect of nano-modification is analyzed.
Development of a cost-effective wastewater treatment process: combination of different process
Authors: Du Song , Jin Wenbiao
Published: January 2021

Caprolactam wastewater produced by the production process of caprolactam is characterized by a very high toxicity and chemical oxygen demand (COD) values, having potential harm to the environment if treated improperly. However, these characteristics make caprolactam wastewaters difficult to treat using traditional methods. So the aim of this work was to develop a cost-effective caprolactam wastewater treatment process. Fenton oxidation, sequencing batch reactor activated sludge process (SBR) and electro-catalytic oxidation were proposed to treat caprolactam wastewater in the laboratory scale, and the treatment effects were investigated. Compared with Fenton oxidation, SBR and electro-catalytic oxidation can treat caprolactam wastewater at a lower cost and more efficiently. The pilot test results indicate that the COD can be decreased to less than 1000 mg/L by the combination process, and when the COD removal rates maintain 90%, the cost of caprolactam wastewater treatment is below 6 yuan/m3. The combination process showed better economic benefit.
A preliminary study on the Evaluation Index of Green Service area under the concept of New Green Building Evaluation Standard
Authors: Jun Liu , Chunfeng Liu , Fang Peng , Jing Zhao
Published: January 2021

This paper compares the evaluation standards of new and old green buildings, and studies the existing evaluation system of Expressway Green Service area, this paper expounds the relationship between the existing Green Service area evaluation system and the new and old green building standards, and finally, combining the new green building evaluation standards and the actual evaluation work, advances the new Green Service Area Evaluation Index, it will guide the revision of the relevant policy standard of the current Green Service area.
Preparation of Zinc Cyanide and Elimination of Free Alkali in Cyanide
Authors: Wang Siyu , Wang Xiangcheng , Hao Yunping
Published: January 2021

Zinc cyanide can be prepared by double decomposition reaction of sodium cyanide or potassium cyanide with zinc chloride. Before the preparation of zinc cyanide, it is necessary to remove the free alkali in the raw material sodium cyanide or potassium cyanide. Magnesium chloride is used to remove the free alkali in sodium cyanide or potassium cyanide. The concentration of cyanide ion in potassium cyanide solution under different conditions is measured. The results show that magnesium chloride can not only remove the original free alkali in potassium cyanide, but also promote the hydrolysis of potassium cyanide to produce new free alkali and react with it to form new precipitate. By analyzing the components of the precipitate, it is determined that the main components in the precipitation are Mg(OH)2 and MgCO3. The final conclusion: after the free alkali in cyanide is removed by magnesium chloride, the solution must be quickly put into the double decomposition reaction to reduce the further loss of cyanide ion; In the preparation of zinc cyanide, the adding order needs to be noted: the cyanide aqueous solution must be added into the zinc chloride solution to ensure the excess of zinc chloride.
Research on Short-term Aging of Lignin Modified Asphalt
Authors: Fu Xin , He Mao , Liu Yuancai
Published: January 2021

In order to study the micro-aging mechanism of lignin-modified asphalt, different asphalt samples were prepared with lignin content of 0% and 12% by mass. The conventional asphalt index test and high-temperature dynamic shear rheological test were used to analyze the different asphalt samples. The change law of the performance of modified lignin modified asphalt with thermal oxygen aging time. The results show that adding appropriate amount of lignin to each asphalt will increase the penetration and ductility of the base asphalt, reduce the softening point, and significantly improve the high-temperature stability; comparative analysis before and after DSR aging, the complex shear modulus G* increases and The decrease of phase angle δ indicates that lignin can improve the high-temperature rheological properties of asphalt.
Effect Analysis of Removing Lead and Arsenic from contaminated soil by Selected Eluents
Authors: Liu Ying , Yang Xiaomao , Zeng Hui , Zhao Zhenye , Xu Tingting , Wang Menghan
Published: January 2021

In order to reduceof the amount of lead and arsenic in contaminated soil, CA(citric acid), PA(polyepoxysuccinic acid), MA(malic acid) and EDTA were used to remove as chemical extractor. The experiments showed that the extraction ability of lead was EDTA>CA>MA>PA, and of arsenic was MA>CA>PA=EDTA. The eluents concentration, reaction period and liquid/solid ratio were the key factor of extraction effect. It was evident that the optimal condition was 0.1 mol/L eluent and 2h of extraction period.
Study of Expressway Service Area Function Expansion
Authors: Zhou Liang , Yang Xing , Liu Hongxi
Published: January 2021

With the rapid development of economy and society, in the face of an increasingly large expressway consumer group, the expansion and upgrading of the expressway service area to marketization and industrialization is the only way for the sustainable development of the service area. The service area should be adapted to local conditions when expanding functions, and be expanded in a targeted manner according to the characteristics of each service area.
Performance Test and Stability Analysis of Jute Ecological Bag on Subgrade Slope
Authors: Shaowei Wei , Degou Cai , Song Lv , Jianping Yao
Published: January 2021

Ecological bags have been gradually adopted for ecological protection on the subgrade slope because of their good soil fixation effect, strong water retention performance, fast construction and other advantages. Ecological bags made of natural jute have obvious attributes in environmental protection and economic efficiency. In this study, the tensile and the tearing strength of the common-used jute cloth have been tested. The result shows that the strength meet the requirements of the standards. Compared with current frequently-used ecological bag made of non-woven cloth, the jute ecological bag has large apertures, which is suitable for the growth of dicotyledon plants. Moreover, its high friction coefficient with the soil is beneficial to the structure stability on the slope. On the other hand, a stability evaluation method has been established for the jute ecological bags on the subgrade slope under natural and heavy rainfall conditions. Then the steel wire mesh fixed by the anchor rods is used to enhance the stability of the jute ecological bags, which constitute the ecological protection system for the subgrade slope. Also, the stability of the protection system is analyzed and calculated.
The application of simultaneous paver liquid cement sprinkling system in the road construction of Yun-Mao Highway
Authors: He Boqian , Xu Ji
Published: January 2021

The simultaneous paver liquid cement sprinkling system is the combination of a conventional paver and a simultaneous liquid cement sprinkler. During operation, the cement sprinkler can be installed onto a paver with the use of connectors. When paving the stabilization aggregate mixture, this system sprinkles liquid cement on the working surface. This device can effectively solve the common quality issues such as the formation of cement isolation layer and road pollution, as a result of premature hardening of the pre-sprinkled liquid cement during road construction in high-temperature environments.
Surface Deformation Monitoring of a Section of Gongyu Expressway Based on SBAS-InSAR Technology
Authors: Yang Ying , Sun Yifang , Wu Shihong , Dong Xuegang , Huang Hanyao , Cao Xiaoxu , Huang Xinqing , Meng Zhiguo
Published: January 2021

It is difficult to monitor the surface deformation along the expressway for the critical climate conditions in Tibet plateau. In this paper, based on sentinel-1A SAR data, the surface deformation along the Gongyu expressway was tried to evaluate using time-series SBAS-InSAR method. The results indicate that the surface deformation in most regions is within the safe acquirement of the expressway. Moreover, the surface deformation indicates a strong seasonal effect. Finally, two special spots with dangerous surface deformation are identified along the expressway.
On ecological slope protection technology of highway construction in Tibet
Authors: Li Meiling , Yang Ying , Wu Shihong , Xu Gang
Published: January 2021

The study of highway ecological slope protection in the Tibet Autonomous Region of my country is still in its infancy due to factors such as climate and topography. This article introduces the main ecological slope protection technology and its application scope of Tibet highway, and analyzes the ecological slope protection technology from the perspective of the environmental characteristics of various areas in Tibet. The application in slope protection of highways in Tibet explores the existing problems and puts forward the suggestion that ecological slope protection needs to be combined with engineering slope protection. With the application and promotion of new technologies and techniques for ecological restoration and the gradual improvement of highway engineering construction techniques, the application of highway slope protection in Tibet will become increasingly perfect.
Research on the Role of Financial Industry in Eliminating Overcapacity in Hebei Province
Authors: Liu ailong
Published: January 2021

In order to solve the problem of excess capacity, Hebei Province has taken various measures to strictly implement the Guiding Opinions on Resolving Serious Overcapacity Contradictions issued by the State Council. In this process, most of the measures taken are administrative intervention, and the relationship among management measures, market rules and economic factors is not very clear. Based on this, this paper, starting from the excess capacity of Hebei iron and steel industry, analyses the relationship between investment return rate and investment ratio, and the relationship between profit and reduced capacity of iron and steel industry. On the basis of the analysis and the background of deepening the structural reform of supply side, this paper puts forward effective measures to solve the excess capacity of iron and steel industry.
Bibliometrics and visualization analysis of China's Service Quality Development Trend
Authors: Xu Lei , Ni Yuan , Han Pengfei , Zhang Teng
Published: January 2021

From the aspect of bibliometrics and social network analysis, this paper studies the content characteristics and network evolution of service quality in China, form visual analysis charts and summarizes the research hotspots and development trends. Taking CNKI database as the data source, data mining and association analysis of sample data were carried out by means of manual judgment, keyword co-occurrence, bibliometric software BICOMB and Pajek. 872 related literatures were retrieved from 1999 to 2019, and the tendency of the number of published papers in each year was close to the inverted U type. This study expands the application fields of bibliometrics and social network software, and analyzes the development trend of service quality. The theoretical and practical research on service quality has achieved rapid development in the past 20 years. The library service quality and service quality satisfaction have always gotten a high level of attention, and the characteristics of network platforms for service quality have gradually become apparent because of the development of the Internet and computer technology.
Single-cell transcription group sequencing and the application of artificial intelligence in developmental biology
Authors: Yang Le
Published: January 2021

In the past two or three years, genome sequencing technology has been rapidly developed. Large-scale sequencing projects such as the Human Genome Project and the Cancer Genome Project have been launched one after another. Up to now, due to the emergence and research of artificial intelligence, it has brought us many possibilities. The purpose of this article is to use artificial intelligence to help single-cell transcription sequencing as much as possible. Based on the idea of Euclid algorithm, an improved K-means algorithm is proposed, which to a certain extent avoids the phenomenon of clustering results falling into local solutions, and reduces the appearance of the original K-means algorithm due to the use of error squares criterion function. In the case of dividing large clusters, the simulation experiment results show that the improved K-means algorithm is better than the original algorithm and has better stability.
The Study of Cryosurgical Micro-instrument on Biomedicine
Authors: Song Tao , Liu Baolin , Jiao Linhan , Zhang Wanzhu
Published: January 2021

This paper introduces the development course of cryosurgery, mechanism, advantages and disadvantages, application scope, the analysis of the current world advanced the development of cryogenic surgical instruments and its principle and performance, found that at present, the development of the cryoablation equipment mainly for the treatment of diseases such as cancer such heavy research, thus ignore the crowd larger quantity of the treatment of skin disease research. cryopen are introduced in this paper to solve small pathological tissues such as skin disease treatment. we study a new type of freezing and melting equipment, named cryopen. at the same time, the simulation of treating abnormal skin is completed effectively. The results show that cryopen is very good for the treatment of abnormal skin. The future development of small cryoablation equipment is also put forward.
Evaluation of the Health Management Research Capabilities and Learning Needs of Hospital Management Personnel
Authors: Wu Zijian , Yu Shaoxuan , Li Yihua , Zhang Lei , Cheng Tiantian , Ouyang Shuting , Chen Shaohan , Liu Dongwei , Chen Jianqing , Yang Zhihuan
Published: January 2021

The new era puts forward higher requirements on the quality of hospital management personnel, so it is significant to improve their health management research capabilities and encourage them to solve practical difficulties through scientific research as well as make innovations to their management thinking. In this article, a questionnaire survey of 100 hospital management personnel was carried out in a tertiary hospital in Guangzhou, China, to identify their health management research capabilities and learning needs for related knowledge. The results showed that most of the interviewees were young and middle-aged women with relatively high academic qualifications, mainly in medical and management majors. Their scientific research knowledge base and learning needs are on the average, and their scientific research method foundation is relatively ideal. There are significant differences in scientific research knowledge base, scientific research training needs, and scientific research methods among those with different ages and educational levels (p<0.05).
Biostatistics in Clinical Decision Making What can We Get from a 2×2 Contingency Table
Authors: Zhang Shanshan
Published: January 2021

Biostatistics is an essential part when making clinical decisions. Applications of 2×2 contingency tables playing a key role in conducting analysis involving binary variables. When it comes to analysis based on 2×2 contingency tables, most people are familiar with the concept of sensitivity and specificity for evaluating a new test, but predictive values and receiver operating characteristic (ROC) curves would also provide information. Besides, Odds Ratio (OR), Risk Ratio (RR), and Chi-square test are measures based on 2×2 tables and commonly applied in retrospective and prospective studies. This article will first review the two kinds of application of 2×2 contingency tables, evaluating a new test compared with a reference standard, and exploring the relationship of exposures and outcomes in retrospective or prospective studies. Two clinical examples are presented to demonstrate these basic biostatistical concepts: diagnostic accuracy of 64-slice multidetector computed tomography (64-MDCT) to identify periampullary duodenal diverticula, and a randomized clinical trial (RCT) to examine the effectiveness of Dexmedetomidine for prevention of delirium in elderly patients after non-cardiac surgery. Correctly understanding these concepts will assist clinicians and medical researchers to analyze the data and interpret the results, and therefore make accurate decisions in clinical practice.
Rapid quantification of epigoitrin in the extraction process of Radix Isatidis using near infrared spectroscopy
Authors: Li Caixia , Huang Wenjing , Wang Qian , Huang Zhiwei , Yan Shikai
Published: January 2021

Near-infrared Spectroscopy (NIR) is widely accepted as an efficient technology for process control in the production of traditional Chinese medicine (TCM). This study was to establish a NIR-based approach to determining epigoitrin of Radix Isatidis during temperature-controlled extraction process. 86 extracts of Radix Isatidis were prepared in 50 °C water for 4 hours, and were randomly divided into validation set and calibration set. The concentration of epigoitrin of each sample was determined by HPLC/UV, and correspondingly NIR spectra of those samples were also acquired. Partial least square (PLS) algorithm was utilized to develop a predictive model on NIR spectra data and contents of epigoitrin in samples of calibration set. The model displays good performance with acceptable values of SECV, SEC, LV and R2, and it was applied to predict the concentration of epigoitrin in samples of validation set from their NIR data. As a result, the model produced accurate result with little deviation between predicted values and experimental values. The proposed NIR method is expected to be developed as a promising approach for process control in TCM production.
Toxicity Mechanisms and Potential Uses of Extracted Mushroom Toxins - Amatoxin, Antamanide, Muscurine
Authors: Liang Xiaochen , Wang Tianxu
Published: January 2021

Mushroom, as a popular kind of wild edible fungi, has raised the attention of many scientists around the globe, due to the fact that increasing numbers of fatal mushroom poisoning cases worldwide have been reported each year. Therefore, to overcome the issue of fatality of mushrooms with an attempt to help people prevent mushroom poisoning, studying mushroom toxicology has become a significant topic to many biochemists; a growing number of researches are conducted focusing on mushroom toxins as well as their chemical properties and toxicity mechanism. In this review, properties and mechanisms of three major toxins (amatoxin, antamanide, muscarine) are chosen as the research focus. The three major toxins, which are extracted from wild mushrooms, will be summarized and studied based on past research findings. Our goals are trying to find possible treatments of each toxin as well as their potential usage in the pharmaceutical industry, which can be especially beneficial towards research of mushroom-extracted drug and food-poisoning toxicity treatment for further investigation and academic references.
Application of Convolution Network Model Based on Deep Learning in Sports Image Information Detection
Authors: Zhang Xiaoqiao
Published: January 2021

In recent years, convolution neural network has achieved great success in single image super-resolution detection. Compared with the traditional method, this method achieves better reconstruction detection effect. However, the network structure of the existing reconstruction model is shallow, and the convolution kernel has a small acceptance, so it is difficult to learn a wide range of motion image features, which affects the quality of motion image information detection. Aiming at the problems and shortcomings of the existing sports image information detection based on convolution neural network, this paper proposes the application of convolution network model based on deep learning in sports image information detection. In this paper, we get the average SSIM value from the data of set5, set14, bsd100 and urban100 by using the X4 model of different algorithms. The average SSIM value of set5 is 0.865, which shows that the quality of sports image reconstruction and the reconstruction efficiency of the model can be improved by using the local image features of different scales, which provides technical support for sports image information detection. The research in this paper has important practical significance for the further development of the two and the reform of the convolution network model in sports image information detection.
Study on microbial detection technology in food safety
Authors: Zhang Xindi
Published: January 2021

Economic development has not only led to the steady development of the gross national economy, but also provided a fundamental guarantee for the life of the residents at this stage. However, with the rapid development of economy, people’s attention to hidden safety problems has gradually shifted from big problems to “small details” of food safety. At the same time, in order to reduce the health problems of consumers in the process of eating products, we should start from the source of food, and use microbial technology in the current food safety testing, so as to fundamentally improve the quality of food safety. At present, PCR, impedance, ATP bioluminescence, lamp and enzyme-linked immunosorbent assay are widely used. In this paper, the role of microbial detection technology was described, and the application of microbial detection technology in food safety detection was analyzed in depth, hoping to provide a reference for ensuring food safety through the promotion of microbial detection technology.
Identification and enumeration of Clostridium spp. In sufu
Authors: Qiong Xu , Yang Liu , Yi Yu , Nana Zhang , Yue Wang , Lei Zhao , Shiyu Weng
Published: January 2021

In this study, Clostridium spp. was counted in 49 Chinese commercial sufu samples, and 25 samples were detected Clostridium in all samples: the detection rate was 51.02%. About 93.87% of the
samples contained Clostridium at low levels (log CFU/g＜3.0) and one sample had over 4.12lg CFU/g
indicating potential hazard to consumers. The 16S rDNA identification was carried out on the genus Clostridium, and the isolates were confirmed as Clostridium botulinum, Clostridium sporogenes, Clostridium beijerinckii and Clostridium bifermentans, while Clostridium butyricum, Clostridium botulinum, Clostridium perfringens and Clostridium bifermentans were the species detected in the sufu samples by high-throughput sequencing. Based on these results, the research on the number and distribution of clostridium and the possible risks of biotoxins in fermented food needs to be strengthened. To our knowledge, this is the ﬁrst study to isolate and identify Clostridium spp. in sufu.
Comparing Complete Mitochondrion Genome of Bloom-forming Macroalgae from the Southern Yellow Sea, China
Authors: Xia Jing , He Peimin , Liu Jinlin , Liu Wei , Tong Yichao , Sun Yuqing , Zhao Shuang , Xia Lihua , Qin Yutao , Zhang Haofei , Zhang Jianheng
Published: January 2021

The green tide in the Southern Yellow Sea which has been erupting continuously for 14 years. Dominant species of the free-floating Ulva in the early stage of macroalgae bloom were Ulva compressa, Ulva flexuosa, Ulva prolifera, and Ulva linza along the coast of Jiangsu Province. In the present study, we carried out comparative studies on complete mitochondrion genomes of four kinds of bloom-forming green algae, and provided standard morphological characteristic pictures of these Ulva species. The maximum likelihood phylogenetic analysis showed that U. linza is the closest sister species of U. prolifera. This study will be helpful in studying the genetic diversity and identification of Ulva species.
Efficacy of Jianpi Huatan Dingxuan Decoction in the Treatment of Vertigo and Phlegm Obstruction Syndrome
Authors: Zheng Weifeng , Zhang Wentao , Wang Yuqin , Cui Yinglin
Published: January 2021

Objective: To explore the clinical effect of the application of Jianpi Huatan Dingxuan Decoction in the treatment of patients with vertigo and phlegm obstruction. Method: The research work was started in Henan Provincial Hospital of Traditional Chinese Medicine. The work will be carried out from October 2019 to October 2020. The patients are all patients with vertigo and phlegm obstruction syndrome who received treatment during this period. 100 of them were selected as this time. The study subjects were randomly divided into two groups, the control group given conventional western medicine treatment and the experimental group given Jianpi Huatan Dingxuan Decoction. The treatment effects of the two groups were compared and analyzed. Results: The treatment efficiency and nursing satisfaction of the experimental group were 96.00% and 94.00% respectively, which were significantly higher than the 82.00% and 78.00% of the control group. Before treatment, the vertebrobasilar blood flow velocity of the patients was relatively low, P>0.05. After the treatment intervention, the vertebral artery blood flow velocity and the basilar artery blood flow velocity of the experimental group were significantly higher than those of the control group. The data differed greatly. P<0.05, the experimental group had better results. Conclusion: The application of Jianpi Huatan Dingxuan Decoction in the treatment of patients with vertigo and phlegm obstruction has a significant effect, which can promote the recovery of patients, improve the effective rate of clinical treatment, and has positive significance for clinical development.
Study on aging parameters and effect of rice wine based on aging device
Authors: Ni Hongjun , Wang Kaixuan , Shi Qijun , Lv Shuaishuai , Liu Yonglan , Gu Ruobo , Wang Xingxing
Published: January 2021

Rice wine is a kind of low alcohol and high nutrition four season drinking wine made from water and glutinous rice. Generally, new rice wine needs to undergo a natural aging process for about 1 year. In order to solve the problems of long natural aging period and poor aging effect of rice wine, a set of rice wine aging device was designed and a comprehensive method was used to age the rice wine. By orthogonal experiments, the optimal aging process parameters were determined, which were temperature 55 °C, aging time 12 days, and hydrogen peroxide addition 4 mL/200 mL. The results show that the content of ethyl acetate and ethyl lactate in rice wine are 0.44 g/L and 0.80 g/L respectively and the content of total acid and total sugar reaches 6.9 g/L and 230.2 g/L respectively. Compared with naturally aged rice wine, it is verified that the effect of artificial aging can achieve the effect of natural aging for one year. This experiment provides a new method for the study of artificial aging of rice wine.
Change in the stability of goat milk and cow milk due to pH and heat
Authors: Fan Xiaoxue , Cheng Ming , Zhang Xiaoning , Wang Cunfang , Jiang Hua
Published: January 2021

This paper aimed to evaluate the changes in the thermal stability of goat milk, cow milk and homogenized milk under different pH conditions. The results showed that goat milk was of type B milk, and the thermal stability were positively correlated with the pH value. But cow milk was of type A milk, the most stable pH of fresh milk was 6.9, while it was 6.7 for homogenized cow milk. Compared with cow milk, the acidification of goat milk was stronger due to heat. Therefore, in the process of milk production, the germicidal heating conditions of two different milk sources should be determined according to their thermal stability.