bluuebunny/crossref_metadata_2025 huggingface dataset:
Investigation and Protection of Ancient and Famous Trees Resources in Xinhua County
Authors: Xiao Yanwu , Wang Dinglong , Wu Yi
Published: March 2021

On the basis of investigation and research, the characteristics of ancient and famous trees in Xinhua County were analyzed. Firstly, the paper analyzed the distribution of families, genera and species of ancient tree resources in Xinhua County. Secondly, the distribution characteristics of ancient and famous trees: 1.the ancient and famous trees are distributed in towns and villages. 2. Tree species with the number of ancient and famous trees exceeding 1000 years. 3. Value analysis of ancient and famous trees. Then, this paper analyzed the trees values:1. Important historical and cultural values; 2. Important medicinal value; 3. High edible value. Finally, some protection countermeasures of ancient and famous trees have been proposed.
Emergency administration: public administration model under major epidemic condition-- A case study of the spread period of new coronavirus pneumonia
Authors: Ye Haiyan
Published: March 2021

The transition of public administration mode has always been the focus of society and the organic unity of administration mode and administrative environment is the basic requirement for effective governance as well as implementation of our party’s principle of seeking truth from facts in the field of public administration. In this paper, the author summarizes the administration mode that the government adopts to deal with challenges from non-marketization along with decentralization and dual command in the spread period of the major epidemic “new coronavirus pneumonia” as emergency administration. In order to concentrate on making a good control of the epidemic, current normal administration mode needs to be transformed into an all-round emergency administration mode in the face of abnormal condition, which is based on emergency market control with emergency power control as the core, emergency crowed control as the key, emergency information control as the carrier and other controls as the guarantee.
The study of Co2+ on waste lithium-ion batteries with acid leaching
Authors: Lv Xiaoshu , An Changwei , Liu Jia , Cao Xu , Liu Jiaojiao
Published: March 2021

In order to reduce the waste lithium ion battery pollution to the environment, and realize the recycling of valuable resources. The paper studied the process of the citric acid leaching extraction of Co2+ from waste lithium battery cathode material. We investigated the influence of five factors (citric acid concentration, reaction temperature, solid-liquid ratio, acid leaching time, the amount of reducing agent) acid on extracting rate of Co2 +. The results show that the optimum technological conditions are the concentration of citric acid for 1 mol/L, the amount of reducing agent for 1vol. %, solid-liquid ratio of 3g/100ml, reaction temperature 70°C, reaction time 120 minutes. In this condition, the extraction rate of Co2+ reaches 96%.
Characteristics of nitrogen pollution for shallow groundwater in typical urban planning area in Taihu Lake Basin
Authors: Zhao Donghua , Zhu Xiaoming , Shu Mengzhao
Published: March 2021

In order to verify the nitrogen pollution status of shallow groundwater in typical city of Taihu Lake Basin, urban planning area of Suzhou city was selected as the study area, and 14 sampling sites representing different land use types were selected to carry out water quality analysis. The status, temporal variability of nitrogen pollution and composition characteristics of various forms of nitrogen for shallow groundwater were analyzed. The results show that the nitrogen pollution of shallow groundwater in study area is relatively serious. The average contents of total nitrogen, dissolved inorganic nitrogen, total organic nitrogen, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen are 8.23, 5.45, 2.77, 2.53, 0.12 and 2.81 mg/L, respectively. The variation coefficients of various forms of nitrogen are large and the spatial differentiation is significant. The contents of ammonia, nitrite and nitrate in shallow groundwater show an obvious spatial distribution characteristics. Nitrogen pollution in old urban areas is much more serious than other types of areas, especially ammonia nitrogen pollution is particularly prominent. Inorganic nitrogen is the main form of nitrogen in groundwater, while ammonia nitrogen is the main form of inorganic nitrogen.
Hydrochemical properties and influencing factors of nitrogen pollution for shallow groundwater in the Urban planning area of Suzhou City
Authors: Zhao Donghua , Zhu Xiaoming , Shu Mengzhao
Published: March 2021

Detailed study of the chemical analysis results of 14 shallow groundwater samples, representing different land use types, were carried out in an attempt to identify the hydrochemical properties and influencing factors of nitrogen pollution for the Urban planning area in Suzhou city, China. Hydrochemical properties were analyzed by water quality and its’ main influential factors of nitrogen pollution were analyzed by using ArcGIS geostatistics module and factor analysis method. The results show that the water chemistry type of shallow groundwater in the study area was mainly HCO3-Ca·Na type, the shallow groundwater was in a strong reducing geological environment rich in organic matter. Shallow groundwater shows a significant nitrogen occurrence with high ammonia and low nitrate owing to the strong reducing geological environment with abundant organic matter and low oxygen in the study area.The occurrence forms of nitrogen in shallow groundwater were controlled by the oxidation-reduction environment. Factor analysis shows that the nitrogen content and pollution of shallow groundwater are mainly controlled by human activities and geological conditions, followed by formation lithology, redox conditions and topography.
Research on Environmental Risk Assessment Method of Chemical Industry Park
Authors: Xin Li , Meng Fanbin , Zhang Ning
Published: March 2021

Environmental risk assessment of industrial parks is a hot spot in the field of environmental management and safety engineering. Risk assessment can quantify the possible extent of the impact or loss of risk events on life, property, environment and other aspects. This study sorts out three types of current approaches for risk assessment in industrial parks. We introduced the applications of those approaches, intending to prompt the further study of ERA for industrial park.
Effects of different fertilization treatments on soil compaction and crop growth
Authors: Liu Zhe , Cao Shiliu
Published: March 2021

In order to explore the effects of different fertilization treatments on soil properties and crop growth during the maturation of raw soil, a pot planting experiment with different fertilization treatments was carried out. Three fertilization treatments were set up in the experiment: single organic fertilizer treatment (OF), pollution-free fertilization treatment (NP), and conventional fertilization treatment (CF). The compactness of different soil layers,maize plant height, Chlorophyll value and above-ground biomass under the three fertilization treatments were measured. The experiment results showed that: compared with CF treatment, OF and NP fertilization treatment can better improve soil compaction and increase the plant height and leaf green value of maize, the chlorophyll value of maize under OF and NP treatments increased by 22.6% and 10.6%, and the plant height of maize increased by 58.0% and 31.8% respectively. The order of the magnitude of change of soil compaction in different soil layers was CF> NP> OF. Under conventional CF treatment, the maximum compactness value of 20 cm soil layer was 1426 kPa. For the aboveground biomass of maize, the aboveground biomass of maize under OF and NP fertilization treatments were significantly higher than that of CF fertilization treatment (P<0.05). In summary, OF and NP fertilization treatments can help improve the compaction of raw soil and the growth characteristics of crops, and increase the productivity of raw soil.
The Application Progress of Nano Materials for Remediation in Contaminated Soil
Authors: Sun Pei , Sun Yingying , Luo Yuhu , Hu Yi
Published: March 2021

With the rapid development of population and industries, the pollution of land resources is more and more serious. Therefore, improving the contaminated soil for reuse become a new idea to make rational use of land resources, also to solve the contradiction among population, resources and environment. This study integrates the correlational research on the application of nano materials for remediation in contaminated soil, so as to provide a theoretical basis for rational and efficient use of land resources, make a contribution to the efficient use of land resources of China as well.
Advances in the Study of Microbial Adsorption of Heavy Metals
Authors: Chang Min
Published: March 2021

This paper discusses the current application of microorganisms in adsorption of heavy metals. The structure of microbial adsorption of heavy metals, the factors affecting microbial adsorption and the prospect prediction of microbial adsorption of heavy metals in activated sludge are studied, and the focus of the next step of research is put forward to provide conditions for engineering.
Dust monitoring and processing system based on WiFi Mesh network distributed backup routing algorithm
Authors: Zhang Lihui , Ma Xiaolin , Zhang Pei , Guo Zeyu
Published: March 2021

This paper proposes a dust monitoring and processing system using WiFi Mesh network distributed backup routing algorithm. The system is based on WiFi Mesh technology to realize real-time dust data monitoring and dust processing, and transmit the data to MCU and cloud. Users can access the cloud through mobile devices to obtain dust concentration data in the industrial environment. The system uses WiFi Mesh network distributed backup routing algorithm to improve the self-healing of the network system and the stability of the overall system.
Based on Microcontroller Can Only Car Design
Authors: Shi Ting
Published: March 2021

At present, most disinfection methods in indoor scenes use manual spraying and sweeping. The disinfection workers hold watering cans or pesticide sprayers to spray disinfection solutions, which is very inconvenient to use. In this paper, an automatic disinfection car is designed to be used in indoor places such as hospitals, shops, banks, etc, without manual cleaning. Especially during the current COVID-19 epidemic, it effectively realizes the timely disinfection of the public indoor environment, reduces the waste of human resources, protects the cleaning and disinfection staff, and reduces further cross-infection.
Test Comparison and Performance Analysis of Two Kinds of Almonds Shell Kernel Sorting Equipment
Authors: Zhang Li , Bian Bo , Zhou Xin , Yang Huiming , Tuerdi Tuluong
Published: March 2021

In the process of almonds kernel, the separation of shell and kernel is an important part of the processing procedure. Using mechanized shell and kernel separation method to replace traditional manual sorting is the main way to improve production efficiency, reduce labour intensity, and save costs. Draw lessons from the existing nut machinery shell and kernel separation method, shell and kernel separation principle and working characteristics, analyse the separation efficiency of the two types of almonds separating machines, and put forward corresponding suggestions for the future development of almonds shell and kernel separation machinery for the follow-up research and development of Badam kernel and nut separation device and key technology provide technical reference.
Difficulties and Solutions for Public Health Data Governance Under the Normalization of Epidemic Prevention and Control
Authors: Wang Zhiyao , Shi Xiaofang , Li Honglin
Published: March 2021

COVID-19 has become the world’s largest public health emergency in recent years. For the needs of epidemic prevention, governments of various countries encourage public and private institutions to actively use digital technology to carry out joint prevention and control work. The use of data governance to prevent and defuse major risks and improve the ability to respond to public health emergencies is an important part of promoting the modernization of the national governance system and governance capabilities in the new era. This article believes that the establishment of a data security governance mechanism in public health emergencies should be based on application scenarios, with legality as the basic requirement, establish an accountability system, adhere to the principles of transparency, purpose restriction, confidentiality, and minimum necessity, and standardize digital technology design based on this Standards and effective supervision of public health data.
Application of Mid-surface Layer in Asphalt Pavement Tunnel Paving Based on Foam Warm Mix Technology
Authors: Liu Fangtao , Xu Haining , Yang Fei , Yao Aichao
Published: March 2021

With the deepening of the national green transportation policy, the constructi on of environmental protection and energy-saving highway has become the focus of th e industry. Based on the problem of flue gas emission from asphalt pavement tunnel pa vement, the mechanical foaming warm mixing technology is introduced. The foaming characteristics of modified asphalt, the performance of foam warm mix mixture, and th e evaluation of energy consumption and emission reduction of foam warm mix mixtur e are studied and analyzed. The results show that the energy consumption of foam asph alt production is significantly reduced, which has positive demonstration significance f or energy saving and emission reduction in highway construction.
Research on Water Treatment Method Based on Graphene Composites
Authors: Zhang Yihang , Fu Aoran , Guo Jirui
Published: March 2021

In this paper, the graphene material prepared by graphite and zeolite acted together to produce paper cup composite material to adsorb cadmium ion in water. The effects of adsorption time, pH value, the amount of stone composite, the concentration of cadmium ion and sodium ion on the adsorption of cadmium ion were discussed respectively. The results show that the content of cadmium ion in water is the least when the adsorption time is 2h and pH is 5.4. with the increase of the amount of graphene/zeolite composite, the existence of sodium ion will inhibit the adsorption of cadmium ion. The adsorption of cadmium ions commonly used in water treatment was studied in this paper.
Three point bending flexural strength of cemented soil reinforced by PVA and Jute fiber
Authors: Yao Xin , Chang Shiqi , Dong Xiaoqiang
Published: March 2021

In this paper, the flexural and post-cracking performance of deep soil–cement column reinforced by Jute fiber and PVA fiber, respectively were investigated. The results indicates that both Jute and Polyvinyl alcohol fiber significantly improved the first crack flexural strength and peak flexural strength. In addition, the fiber content play a critical role for enhancing the post-cracking performance of specimens, the peak strength ratio, residual flexural strength ratio, ductility index and energy absorption capacity increased with increasing fiber content. Jute fiber group exhibited slightly better in terms of energy absorption capacity.
Application of Metal Composite Materials in Hot Encaustic
Authors: Liao Dajie
Published: March 2021

This paper studies the application methods and skills of adding metal materials (powder, crumb, fiber and solution) into traditional hot encaustic techniques, so as to explore the comprehensive application of various materials and media and enrich artistic expression techniques. In this paper, the feasibility of using metal materials in hot encaustic is affirmed. Individualization of artistic exploration means that artists must improve their artistic language according to their own knowledge and experience structure. In the process of exploring the language of hot encaustic, I try hard to integrate my expression techniques into the picture making mode, so as to achieve a more complete research effect and accumulate experience for future hot encaustic creation.
System Identification of ZnO Nanostructure Based On Physical Field Analysis and Deep Learning
Authors: Hong Jianxiao
Published: March 2021

Zinc oxide nanowire is a widely used one-dimensional nanomaterial. The topological structure of nanowire determines its performance. At present, many researches have made on the growth conditions and structural parameters of zinc oxide nanowires through experimental methods. However, there is a lack of quantitative research on the correlation between macro physical fields and the parameter of structure. In this paper, we propose NPPN (Nanostructure-Parameter Prediction Network) based on deep learning algorithms to explore the correlation between physical fields and nanostructure parameters. The dataset is firstly created by experimental results and CFD simulation. We carry out large batch of preparation experiment of zinc oxide nanowires using the KQS automated machine based on the low-temperature two-step hydrothermal method. Meanwhile, we simulate the real physical field distribution of the reaction chamber through CFD software. The results show that the NPPN model has good predictive performance for the structural parameters of zinc oxide nanowires.
A Research on Mathematical Model and Prediction Method for Raw Tobacco Material Quality Based on Cluster Classification
Authors: Shu Hao , Gao Song , Xiong Bin , Yan Qunshan , Wei Pei , Wang Ziwei , Tong Yuxing , Le Xi , Chen Yizhen , Liu Zhichang , Chen Dezhi , Xu Jun , Wang Yi
Published: March 2021

The chemical components of 189 kinds of Chinese tobacco materials were analyzed. There were obvious correlations between the total sugar content and reducing sugar content, total sugar content and total nitrogen content, reducing sugar content and nitrogen content, nicotine content and nitrogen content, respectively. There were certain correlations between chemical components and quality evaluation score of the tobacco materials. Total sugar and reducing sugar content showed similar correlations, while nitrogen, chloride ion and nicotine content showed similar correlations. The correlation between each single component and the quality evaluation score was not strong, and it was difficult to be used as a classification standard. Using the cluster classification method, the tobacco materials were well classified into three clusters. For each cluster, a reasonable relationship between the quality evaluation score and the chemical component contents of the raw tobacco material was set up. The method for rapid evaluation of tobacco quality score were established based on these results.
Study of the Physiological and Ecological Characteristics of Peperomia Tetraphylla Stressed on Phenol solution
Authors: Liu Panliang , Wang Jinxiang , Chang Guohua
Published: March 2021

The paper aims to study the change of physiological and biochemical indexes through simulating the effect of different concentrations of phenol solution on the growth of peperomia tetraphylla. Then explore the degree of intimidated, and reveals whether the peperomia tetraphylla could regard as the best plant to absorb the phenol and purify the wastewater. Chlorophyll and malondialdehyde (MDA) were regarded as the physiological and biochemical indexes. The results indicated that under the stress condition which the concentration of phenol is 100 mg/L, leaves of peperomia tetraphylla on the content of chlorophyll and MDA had both increased significantly, it suggests that under the concentration that peperomia tetraphylla has very good adaptability. Under the stress condition which the concentration of phenol is 80∼200 mg/L, stem of peperomia tetraphylla on the content of MDA had increased.
A Novel Method to Restrain Ambient Noise Interference in Transformer Noise Test
Authors: Wu Xiaowen , Li Gang , Cao Hao , Lu Ling
Published: March 2021

A preprocessing method based on wavelet packet decomposition and spectral subtraction algorithm is proposed in this paper. The tested original noise signal is decomposed with the wavelet packet analysis. It is divided into several bands with different frequency range. In these bands, the noisy signals are further processed by spectral subtraction method. The theoretical analysis result shows that the proposed method is effective in restraining the influence of surrounding noises on the result of transformer noise measurement. The proposed method can be referenced for the noise measurement of power transmission and transformation projects.
Research on the Influencing Factors of Hotel “Green and Low Carbon” Behavior on Consumer Experience
Authors: Chen Xiaolin
Published: March 2021

In recent years, with the rapid development of China’s tourism industry and the increasing frequency of business activities, the hotel industry has developed rapidly, and the country has paid more and more attention to environmental protection. More and more “green hotels” have come to the fore. A lot of efforts have been made to keep up with the situation. Customers will encounter various “green and low-carbon” behaviors made by the hotel when they consume in the hotel. For consumers and hotel operators, the consumption experience is very important and affects consumption. There are many factors that affect the consumer experience. Therefore, a systematic analysis is needed to learn the specific influencing factors, so as to better manage the hotel.
Experimental Study on the Constitutive Relationship of Epoxy-Coated Reinforcement to Seawater Sea sand Recycled Concrete
Authors: Zhang Yi jian , Gao Xu , Li Chuanxi
Published: March 2021

In order to study the constitutive relationship between the seawater sea sand recycled concrete (SSRC) and the epoxy-coated reinforcement (ECR), the pull-out tests were performed. There were totally 24 specimens with different types of concrete (natural aggregate concrete, recycled aggregate concrete and SSRC), strength grades (C20 and C25), bond lengths (3d, 5d and 8d), reinforcement types (ordinary steel bars and ECR) and cover thicknesses (67mm and 42mm). Test results indicated that the bond-slip curve of SSRC to ECR was similar to that of RC and OC, which can be divided into three stages: the micro-slipping, the slipping, and the declining. In the case of SSRC specimen and ECR specimen whose protective layer has a thinner thickness, the curvature of the ascending section of the curve decreased significantly. As to SSRC specimen with a higher strength and ECR with a shorter bonding length, the descending section of the curve tends to be flat. Finally, the expression of the bond-slip constitutive relationship between SSRC and ECR was proposed, which can shed light on theoretical analysis and practical engineering.
New Type of Smoke Purification Device in Smoking Room
Authors: Han Wenyu , Xing Jiaqi , Li Jiacheng
Published: March 2021

In order to solve a series of problems existing in the existing smoking rooms in public places, such as poor indoor environment, the second-hand smoke is easy to adhere to the wall, tables and chairs, etc.In addition,the smoking room and the surrounding environment are easily polluted due to the low smoke collection and processing capacity. The device adopts the method of isolating and sucking the smoke by rotating jet shielding device, combining Nano crystalline adsorption with electro Fenton electrolysis the flue gas is treated. Compared with the traditional smoking room, it has better emission reduction benefits in reducing smoke emissions.
Comprehensive Treatment Device for Harmful Substances in Printer
Authors: Cao Xuewei , Lu Shiqi , Xu Jinfeng , Lei Ziyu
Published: March 2021

With the rapid development of Internet, the sales of printers are increasing at an average rate of nearly 8%. According to statistics, the annual output of printers in China exceeds 60 million. As a new product of high-tech development, laser printer provides us with a higher quality, faster and lower cost printing method. At present, the processing methods of harmful substances produced by printing equipment are mainly used in large copy shops and printing factories. The related environmental protection printers are also in the development stage, which leads to the increase of the incidence of rhinitis, lung cancer and other diseases in the office in recent years. Based on the above background, this work designs a printer harmful substance absorber, which can absorb and process the harmful substances produced by the printer through the device fixed on the printer, so as to reduce the damage to the office air quality, which has high feasibility and necessity of emission reduction.
Sludge Desilting Treatment Device for Urban Pavement Sewer
Authors: Yun Hanfang , Wu Xuejian , Hao Zekun , He Shiji , Cao Xuewei
Published: March 2021

The purpose of this project is to design a sludge cleaning device with wider applicability, simpler operation and better effect, so as to fill the vacancy of sludge cleaning device in domestic small and medium-sized sewer. These devices are not widely used in our country because of their high cost, not suitable for small and medium-sized pipelines and need to be put into wells manually. In this project, a small and medium road sludge cleaning device is designed to solve these problems. The device only needs one person to control, and the whole dredging process is completed by the device independently, which makes cleaning faster and simpler, and has good environmental adaptability.
Health risk assessment of soil Contaminated by As-containing CWAs from JACW
Authors: Liu Xiangcui , Zhao Wenbo , Zhu Yongbing , Ji Chao , Liu Zhe
Published: March 2021

The environmental investigation, sampling analysis and health risk assessment were carried out on the soil contaminated by As-containing chemical warfare agents (CWAs) from Japanese abandoned chemical weapons (JACW) in Northeast China, referring to “Technical Guidelines for Risk Assessment of Soil Contamination of Land for Construction”. The results indicated that the arsenic content in the contaminated sites exceeded the risk screening value. The health risks resulting from oral exposure were higher than those of other exposure pathways, and exceeded the acceptable level of human body. Therefore, the contaminated land must be carried out the soil remediation to reduce the risk to the acceptable level of human health before site development.
Design of risk assessment and decision support system for transportation of hazardous chemicals
Authors: Liu Xiangcui , Huang Hua , Shi Hongxing , Zhang Tong , Zhao Jianfeng
Published: March 2021

According to the needs of risk assessment, path planning and emergency rescue of hazardous chemicals transportation, a risk assessment and decision support system of hazardous chemicals transportation was designed, including system structure, implementation process and main functions. The feasibility analysis of key technologies was carried out. This system took Geographic Information System (GIS) as the support platform, and integrated multi-source information such as hazardous chemicals, global positioning system (GPS), geographic environment, Meteorological information, etc. Based on classical pollution diffusion models and relevant domestic and foreign standards, the index system of transportation risk assessment was built. Then the quantitative index of risk assessment and the early warning sign could be given, and the hazard area of the chemical accident was determined. At last, this risk assessment and decision support system provided suggestions on route optimization for hazardous chemicals transport, which could be severed as scientific basis for emergency rescue and command decision.
Heavy metal pollution characteristics and risk assessment of the soil of Lotus Pool influenced by JACW
Authors: Zhao Wenbo , Liu Xiangcui , Qiu Bo , Peng Wenlian , Liu Qinghai
Published: March 2021

During quite a long time, the Japanese Abandoned Chemical Weapons (JACW) has been a constant threat to the public safety and the environment. Because of the environmental corrosion, the chemical agents leaked from the JACW pollute the soil and water severely, especially the heavy metal chemicals. This paper demonstrated the analytical result of heavy metal pollution caused by JACW in the soil of Lotus Pool, where located in the Northeast of China. 10 typical soil samples were taken, in which 7 heavy metal elements were quantified by ICP-MS. By calculating the Nemerow Index and the ecological potential risk index, the pollution degrees and risk assessment of most sites were evaluated.
Advanced synthesis and application of Nano SiC@ β-glucosidase@ Fe3O4 composite
Authors: Deng Xu , Wu Xiuwen , Chen Haonan , Zhang Yuehang
Published: March 2021

An improved method for immobilizing β-glucosidase was studied in present work. The immobilization included the following steps: preparing a nano silicon carbi de carrier, mixing the carrier, β-glucosidase and a cross-linking agent to obtain immob ilized β-glucosidase. Then, the immobilized β-glucosidase was mixed with Fe3O4 nano particles and self-assembled to obtain nano-silicon carbide@β-glucosidase@ Fe3O4 co mposite. This method improved the activity of immobilized β-glucosidase, and solved the technical problems of low β-glucosidase reuse rate and low enzyme activity retenti on rate.
Effect of Drying Temperature on Drying Characteristics and Quality of Honeysuckle
Authors: Zhang Xuebin , Yang Liuqing , Huang Can , Huang Lijun , Qian Yingjing
Published: March 2021

In order to study the effect of drying temperature on the drying characteristics, chlorogenic acid content and product color of honeysuckle, the drying experiment of honeysuckle was carried out by using a self-made Tester of drying characteristics of honeysuckle. The results showed that increasing the drying temperature could shorten the drying time and increase the drying rate, and with the increasing of the drying temperature, the content of chlorogenic acid in honeysuckle increased at first and then decreased, under the condition of other drying parameters fixed, when the radiation temperature is 80°C, the high drying rate and good product quality can be obtained at the same time.
Performance Evaluation and Spatio-temporal heterogeneity analysis of green Technology Innovation in The Yangt River Economic Belt
Authors: Xia QianMing
Published: March 2021

Starting from defining the connotation of green technology innovation performance, the evaluation index of green innovation performance was constructed. The panel data of industrial enterprises in the Yangtze River Economic Belt from 2010 to 2018 were selected. Dea-sbm model and entropy weight method were used to evaluate and diagnose the green technology innovation performance in the Yangtze River Economic Belt. The results show that; Under time heterogeneity; (1) The performance level of green technology innovation in the Yangtze River Economic Belt and the three regions is generally low and shows periodic fluctuations; (2) The green technology innovation performance of downstream regions “Jiangsu, Zhejiang and Shanghai” is at the level of “high green efficiency and high innovation efficiency”, while the middle and upstream regions are always at the level of “low green efficiency and low innovation efficiency”; Under spatial heterogeneity :(1) the green technology innovation performance level of the Yangtze river economic belt is significantly different; > in the downstream region, > in the midstream region, and > in the upstream region; (2) Only nearly 30% of the provinces and cities are in the “high green efficiency and high innovation efficiency”, while the rest of the provinces and cities are in the “low green efficiency and low innovation efficiency”.
The Light Assets Trend of Multinational Corporation OFDI and Its Enlightenment to China
Authors: You Hongbing , Jie Ran
Published: March 2021

The asset-lighting of foreign direct investment is a new phenomenon in the development of multinational corporations. There are four major characteristics: the increase of non-equity investment, the low proportion of fixed capital, the high proportion of investment in the service industry, and the decline of productive investment. Although the current global foreign direct investment There has been a decline for four consecutive years, but due to the impact of COVID-19, the trend of traditional international investment patterns has further emerged. The overseas investment of multinational companies has entered a new stage, which is mainly affected by the strengthening of restrictions on foreign investment by various countries, the digitization of global value chains, and the further decline of manufacturing. Facing the continuous decline in global foreign direct investment and the new trend of asset-light assets of multinational OFDI, China needs to embrace the digital transformation and shift its focus from a traditional investment model to a digital investment model. In the process of foreign investment, we should combine the differentiation of non-equity models to expand overseas markets, build a regional industrial chain, promote regional production specialization and industrial diversification, and use new methods to solve new problems of anti-globalization.
What do enterprises pay attention to in the comprehensive budget management?
Authors: Li Shi
Published: March 2021

The concept of comprehensive budget management means that under the guidance of strategic objectives, enterprises make full and comprehensive forecasts and plans for their future business activities and corresponding financial status. In this process, through real-time monitoring of the execution process, the enterprise will constantly compare and analyze the actual completion situation with the budget target, so as to guide the improvement and adjustment of business activities without delay, in order to help managers to manage the enterprise more effectively and achieve strategic goals to the maximum extent.
The Study on the Strategy of Plain English in Non-literary Translation
Authors: Li Jingwei
Published: March 2021

Non-literary translation involves every area of social life, including politics, economics, law, scientific technology, culture. No matter what position non-literary translation possesses in history, its current absolute advantage is undeniable. For China, as the globalization accelerates and international contact increases, almost all government institutions have set up foreign affairs sections as well as the Foreign Ministry which is the specialized foreign contact institution. Translation is also indispensability for multinational corporations and large business to conduct crossborder production, procurement and marketing. It is also important in international contact of the research institutions and non-government organizations. All the translations these institutions need are non-literary translation.This thesis includes the basic principle of plain English and the method to deal with the sentences and the method to simplify the translations. It explores the method to make the non-literary translation simple and clear.
Numerical simulation study of uniform steam injection method for SAGD horizontal wells
Authors: Zhang Yanyu , Wang Xiangyu , Sun Xiaofei , Gong Hangfei , Zhang Yunshi
Published: March 2021

Steam assisted gravity drainage (SAGD) has a better effect on heavy oil development than other thermal recovery methods. However, during the SAGD production practice, the problem of uneven temperature distribution of long horizontal well sections has appeared. In response to this problem, the reservoir numerical simulation software CMG is used to simulate different steam injection methods for SAGD horizontal well sections. The results show that the conventional steam injection steam cavity only develops at the heel end, the development length is 1/3 of the length of the horizontal section, and the steam suction profile is uneven. The double-pipe steam injection steam cavity develops at the heel and toe ends, and the steam suction profile is uniform. Improved, multi-point steam injection steam chambers are developed along horizontal wells, and the steam suction profile is the most uniform.
Research on Concrete Construction Technology and Innovation Management in Civil Construction
Authors: Wang Miao , Lan Chunhui , Dai Xiaowei
Published: March 2021

With the continuous progress of society, the continuous development of economy and the acceleration of urbanization, the construction industry has also developed vigorously. In the civil building foundation structure, it is inseparable from the use of mass concrete. Only by ensuring that the structural strength, crack resistance and bearing capacity of mass concrete meet the requirements, can we improve the quality of civil engineering buildings. The construction technology of mass concrete structure in civil engineering buildings is analyzed. The society has put forward more and more stringent requirements for the construction technology of civil engineering, and civil engineering construction technology is the core technology in engineering construction. In recent years, although civil engineering construction technology has developed rapidly and achieved certain achievements and results, most of the technologies are imported or referenced by western technologies, which are lack of innovation, and some of them are relatively backward, wasting a lot of manpower, material and financial resources, resulting in waste of resources, unqualified construction quality and other phenomena. Therefore, in order to better apply civil engineering and improve its construction effect and quality, it is necessary to innovate the construction technology. In the actual construction process, it is necessary to innovate the civil engineering construction technology, so that the engineering construction industry can improve productivity and meet the needs of the development of social construction. Promote the good development of society. This paper will discuss and study the civil engineering construction technology, in order to improve the building quality and economic benefits of the construction industry, and bring some enlightenment to the innovation of civil engineering construction technology.
Research on Risk Early Warning for the Cryogenic Freezing Rain and Snow Disaster
Authors: Zhao Lingyun , Li Qing , Liu Changjun , Wang Yu , Wang Xinghan
Published: March 2021

With the impact of global climate change on extreme weather and the rapid expansion of human activity range, the cryogenic freezing rain and snow disaster is becoming more frequent, bringing quite adverse effects on transportation, electric power and other industries, thus seriously affecting social and economic development and people’s daily life. Implementation of risk early warning is one of the most effective means to prevent the cryogenic freezing rain and snow disaster. This paper, taking Guizhou Province as an example, studies the early warning technology and method for the cryogenic freezing rain and snow disaster based on the demand for prevention of the cryogenic freezing rain and snow disaster, and considering meteorological factors, topography, social economy, power transportation and other factors. On this basis, the weight of risk factors is determined by subjective weighting method, the risk early warning model for the cryogenic freezing rain and snow disaster based on AHP is constructed, and the four-level risk early warning indexes are determined. Trial application is realized in Guizhou Province.
Research Progress of Remote Sensing Monitoring of Soil Salinization
Authors: Li Yanan
Published: March 2021

It has become a trend to apply remote sensing technology to the monitoring of soil salinization to obtain soil salinization information. This article reviews the research progress in data selection, spectral feature indexes, and retrieval methods in soil salt monitoring by remote sensing. The study pointed out that with the development of 3S technology, remote sensing technology has broad application prospects in soil salinization monitoring. The combination of remote sensing and electromagnetic induction technology, as well as the collaborative inversion of soil salinity from multi-source remote sensing data, and the construction of regional, national or global scale monitoring models will be the future development research direction of soil salinity monitoring.
Experimental Study of Triaxial Test of Unsaturated Expansive Soil Shear Strength
Authors: Li Jianhua , Li Lianguo , Li Chungang
Published: March 2021

Based on unsaturated triaxial testing system, with different water content, the strength characteristics of expansive soils of Nanning are studied. Under certain confining pressure, with low water content, stress-strain curve is strain-softening, whereas with high water content, is strain hardening; Under high confining pressure, with low water content stress-strain curve is strain-hardening type, whereas with low confining pressure the stress-strain curve with the increase of axial strain is a slight softening trend. The shear strength of soil has a large sensitivity with moisture content. As the moisture content increases, the expansive soil friction angle decreases linearly. With the increase of water content, firstly its cohesive force increases, it reaches maximum value at the optimum water content, then it decreases with the increase of water content.
Experimental study on similar materials in model test based on orthogonal design
Authors: Li Jianguang , Zou Huisong , Sun Gengyu , Zhou Ziyi , Zeng Lingqi
Published: March 2021

The selection of simulation materials of aquiclude has an important influence on the results of the model test, and has a high requirement in terms of mechanics and hydrologic properties. According to the high quality of river sand as aggregate, cement and gypsum mixed aqueous solution as cementing material, organic silicon mixture similar material as additive, in accordance with the principle of orthogonal test design, sand-binder ratio, cement plaster - and concentration of organic silicon as factors, each factor is equipped with four levels, specimen preparation into under the different ratio of similar model, carries on the uniaxial compressive strength test, splitting test, penetration test and the moisture content test under the different ratio of compressive strength, tensile strength, permeability coefficient and softening coefficient, By means of the range analysis method of orthogonal experiment, the influence degree of each factor level on the similar material is summarized, and it is concluded that the ratio of sand gum to mechanical properties has great influence, and the concentration of organosilicone water has obvious influence on the water rational energy.The new solid-flow coupling simulation material developed in this paper can provide a new scheme for the model test of water-involved problems such as mining under confined water, water-retaining mining and construction in water-rich area, and has high application value.
Demand Analysis of Employment Talents based on Deep Learning
Authors: Chen Jian , Wu Jianbo , Jiang Wenrui
Published: March 2021

This paper forecasts the demand of urban talents in the future years from the perspective of urban talent demand and employment situation of Chinese students. To a certain extent, there is a relationship between the supply of talents in cities and the demand for talents in China. Artificial neural network is a kind of nonlinear system which contains some simple nonlinear connection points or calculation modules. BP neural network is one of the most widely studied and widely used artificial neural networks. BP neural network includes input layer and output layer, which overcomes the shortcomings of traditional evaluation methods and enriches the relevant evaluation methods. The evaluation results can truly map the nonlinear relationship among various analysis indexes. BP neural network model is suitable for nonlinear sample analysis and belongs to quantitative analysis. The grey prediction model belongs to qualitative analysis, which can predict the future development trend of the analysis object, and does not require high data. Therefore, this paper uses the combination of BP neural network model and gray prediction model to predict the talent demand of China’s College Students employment market reasonably and effectively, and finally analyzes the reliability of the prediction results. According to the prediction results, this paper puts forward the development strategy for the city, in order to promote the modernization of the city.
Research on measurement technology of cement bend resistant and compressive machine
Authors: lei Chen , lu Peng , bing Zhang , lu Liu
Published: March 2021

To study the influence of nano material microscopic structure on the macro-mechanical properties of concrete, using AE test and numerical simulation methods, the AE characteristic of Nano-concrete under cyclic loading was investigated. The results show that the Nano-concrete has Kaiser effect, however, it occurs in a certain stress level range. Compared with ordinary concrete, the Nano-concrete has higher AE energy, larger AE amplitude and stronger AE activity during the first 3 loading processes due to the micro influence of Nano-SiO2. Nevertheless, in the 4th loading, the AE energy cumulative curve of Nano-concrete is relatively flat because of the improvement of the bearing capacity of Nano-concrete. The numerical simulation results of RFPA and experimental results are consistent. The stress diagram and AE figure are able to image the characteristics of the specimen crack propagation process and the rupture position, which helps an in-depth understanding on the AE characteristics of Nano-concrete during its damage process.
Summary of Research on Evaluation of Local Scour around Bridge Pier
Authors: Duan Haipeng , Cao Jin , Zhang Yingjie , Huang Yankun , Wei Song , Jiang Yuxi
Published: March 2021

In recent years, bridge disasters caused by scour have occurred frequently; hence, scour has become one of the most important factors that threatens the safety of wading bridges. Although the research on the local scour around bridge pier has been carried out for many years, there are few research results on the evaluation of scour hazard of built bridge piers and that of unbuilt bridge piers. On the basis of previous research results at home and abroad, this paper systematically analyzes the research results related to the evaluation of local scour of bridge piers in recent decades, including the prediction of scour pit depth, the risk assessment of local scour failure and the prediction of scour depth based on risk theory. In this paper, the trend of local scour evaluation of bridge piers is also discussed.
A Note On the Urban Cluster’ Evolutionary Based on the Structure Equation
Authors: Zhang Fengyun , Li Shirong
Published: March 2021

In this paper we mainly discuss the determinant factors on urban cluster evolutionary, we find that: when considering the labor mobility, the increase of urban cluster degree accelerates the high skilled labor force to agglomerate in the core area, and then intensifies the urban spatial concentration. We get the same result for capital flow.
Research on Application Effect of Construction Technology in Agricultural Water Conservancy Project
Authors: Huan Zhou , Meng Li
Published: March 2021

In recent years, with the improvement of Chinese social productivity and the continuous development of science and technology, Chinese agricultural technology is constantly being reformed and developed. In this process, people are paying more and more attention to the development of agricultural science and technology. Development. Government departments have also invested a lot of talents, funds, technology and other aspects in agriculture, especially in the construction technology of farmland water conservancy projects, which has laid down a better and faster development for Chinese agriculture. Therefore, this article mainly analyses and discusses the construction technology of farmland water conservancy projects.