bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of Long-Term Application of Organic Fertilization on the Effects of DCD in Brown Soil
Authors: Fang Zhaohui , Huo Renjie , Luo Peiyu , Han Xiaori , Yang Jinfeng
Published: June 2020

Nitrification (DCD) inhibitor has been proved to be effective in retarding nitrification process of nitrogen in the soil. Application of nitrification inhibitors to the field is considered to be a major method in controlling nonpoint pollution induced by nitrogen fertilizer in agricultural production. Thus a simulating experiment was carried out to study the Influence of long-term application of organic fertilization on the effects of different concentrations of Dicyandiamide in brown soil, and the best application rate was screened to provide references for agricultural practice. Soil samples (0-20cm) were taken from two treatments in October 2017: (1) no fertilization (CK); (2) pig manure input (M). The samples were sieved while still fresh and incubated at a constant temperature (25°C) and soil moisture in different treatments remained 60 percent of field water capacity for 42 days with periodic subsamplings. The experiment included unfertilized control, soil appended with urea nitrogen of 0.4g/kg alone, soil appended with urea nitrogen of 0.4g/kg and 1%DCD, soil appended with urea nitrogen of 0.4g/kg and 2%DCD and soil appended with urea nitrogen of 0.4g/kg and 5%DCD (The Percents represents the percentage of DCD depended on the amount of applied pure N). During the experimental period, the contents of ammonium nitrogen (NH4
+-N), nitrite nitrogen (NO3
--N), pH and nitrification potential were measured. Results of laboratory incubations indicated that DCD effectively inhibited the transformation from ammonium nitrogen to nitrate nitrogen in brown soil and the trends were N+5%DCD > N+2%DCD > N+1%DCD>N. It was found that nitrification was always greater in long-term application of organic fertilizer soil than in long-term unfertilized soil. Long-term application of organic fertilizer reduced the inhibitory effect of DCD.
A Novel Indoor Air Quality Standards and Design Methods in Environmental Assessment
Authors: Lu Youhong
Published: June 2020

In recent years, indoor air pollution has become one of the research hotspots. In the environmental assessment project, the indoor air quality standards have been explicitly included in the control items of China’s green building environmental evaluation standards, and controlling the indoor environment has become important to achieve green buildings. Analysis of the main factors affecting indoor air quality and discussion of design methods based on typical pollutants for indoor air quality are important links for achieving green environmental assessment.
Research on Integrated Ecological Management Engineering Model of Soil Organic Reconstruction
Authors: Li Juan , Lu Yangjie , Shi Chendi
Published: June 2020

In view of the comprehensive problems of soil erosion and soil structural instability in the shoal land, in the process of remediation of Bailongjian in Huayin County, Shaanxi Province, the land reclamation and overburden were comprehensively designed using land leveling, river treatment and overburden comprehensive treatment techniques. Engineering, irrigation engineering, roads and shelterbelts; the implementation of the project model, the total rectification scale is about 67.94hm2, and the newly added cultivated land is about 61.93hm2. The utilization rate and output rate of land have been improved, agricultural production conditions and farmers’ living environment have been improved. At the same time, it is of great significance to prevent soil erosion, continuously establish farmland ecosystems, and promote the improvement of comprehensive agricultural production capacity.
Study on Urban River Ecological Landscape Design
Authors: Liu Yangyang
Published: June 2020

The ecological design of urban rivers is an important part of the urban landscape planning and design system. However, the current urban rivers in China, the rivers are seriously polluted, the primary environment is destroyed, and the water bodies lose their self-purification ability, which not only affects the image of the city, but also threatens the health of the citizens. Therefore, we must pay attention to the environmental design of urban rivers. This article discusses the composition of the river landscape from a landscape perspective. With the increasing emphasis on environmental protection, people’s demand for landscape is getting higher and higher. How to integrate humanistic concepts into design on the basis of ecology is also worthy of our consideration.
Research on Sorting Method of Marine Domestic Waste Based on BP Network
Authors: Zhang Rongjun
Published: June 2020

The feature extraction method of the acoustic wave of different objects in the marine domestic waste is elaborated in this paper, the intelligent recognition model and algorithm of the material based on neural network is established, and sorting tests on common objects such as glass and plastic are conducted, the effect of this sorting method is verified to provide a new idea for the intelligent sorting of marine domestic waste.
Research on Tourism Economy and Tourism Eco-environmental Effect Based on Supply-side Perspective
Authors: Chen Jun
Published: June 2020

Since China’s economy entered the new normal, the government has continuously adjusted the structure of the national economy. As a green economy, tourism economy has been favored by governments everywhere. Tourism has become an important pillar industry of China’s national economy. The development of tourism economy promotes consumption and realizes the growth of economic benefits. Tourism economy has positive and negative effects on tourism ecological environment. As a kind of capital, tourism ecological environment has great influence on tourism economy. Tourism is a comprehensive and linked production and transformation, which is accompanied by a series of social and economic activities in the process of tourism consumption, adding vitality to the development of the whole city’s economy, culture and culture. Theoretically, ecology and environment are indispensable to human beings, and they are one of the elements of human wealth creation. Based on the perspective of supply side, this paper analyzes the relationship between environment and economy, environmental benefits and economic benefits in tourism development from the perspective of factors affecting tourism economy.
Multi-Agent Cooperative Target Search Based on Reinforcement Learning
Authors: Qin Xudong , Li Xiaomao , Liu Yuan , Zhou Rui , Xie Jiajia
Published: June 2020

This paper considers the problem of cooperative search for multiple stationary targets by multi-agent with limited sensing and communication capabilities. An integrated learning algorithm for cooperative search based on reinforcement learning is proposed. In particular, we consider a state containing local probability map and neighbouring agents map which provides the agent with information to plan routes and search collaboratively. In addition, a reward function consisting of target found reward, time consumption reward and guiding reward is designed to guide agents to explore and learn efficiently. To ensure the stability of training process, the policies of agents are frozen and shared periodically in a distributed training framework. The proposed method is tested under simulated scenarios compared with coverage control methods and random strategies. Multiple simulation results show considerable advantages.
Design of Self-Priming Electric Drill Dust Protector
Authors: Luo Rongmin , Lei Mingda , Liu Chunxu
Published: June 2020

Combined with the working principle of dry vacuum cleaner, an electric drill dust collector capable of actively absorbing dust is designed. The device can block the dust generated during the work of the electric drill to prevent it from entering the construction site environment, and can collect and store the dust, effectively reduce the amount of dust in the air of the electric drill construction environment, improve the quality of the working environment of the construction workers, and reduce the silicosis of workers Prevalence. In addition, the device is small in size, simple to use, and has a good dustproof effect, and can be widely used in various electric drill construction environments.
Characteristics and Mechanism Analysis of Impacts of Different Land Management Types on Soil Carbon Sequestration
Authors: Yao Sisi
Published: June 2020

As an important means to effectively optimize land use, land remediation projects need to be systematically analyzed for their qualitative and quantitative impacts on soil carbon retention. In this study, three types of land remediation project areas, namely sandy land, saline-alkali land, and abandoned residential land in Shaanxi Province, were selected as research objects, and the impact of land remediation years on soil carbon retention capacity was analyzed. The results of this study indicate that due to differences in basic soil properties and engineering implementation technologies, different types of land remediation have different effects on soil carbon retention characteristics. Aeolian sandy land, abandoned homesteads, and saline-alkali land remediation have certain effects on soil carbon retention.
Human-machine integration interactive system based on mixed reality technology
Authors: Luan Fengkai , Qu Bo’Lin , Pan Xing
Published: June 2020

With the development of science and technology, human-computer interaction has attracted more and more attention from all walks of life. With the emergence and maturity of Mixed Reality (MR), new ways of interacting with this new technology are developing. From the study, research, to entertainment, production, marketing and other fields can find the development direction and interest needs of this new type of interaction.
3-D Density Imaging Using the Sampling Weighting Function
Authors: Liu Weihua , Tian Baohui
Published: June 2020

In order to address the skin effect in 3-D density imaging, a sampling weighting function was introduced, which is similar to the distribution of kernel function. It can describe the attenuation of density cell with depth, and also can describe the attenuation of density cell in horizontal distance. Taking the sampling weighting function as the constraint condition, the single abnormal body model was inversion. Compared with the case without weighting function constraint, the inversion results are in better agreement with the model data. The results show that the sampling weighting function is potential as a constraint in 3D density imaging.
Inversion of soil heavy metals in Guanzhong area of Shaanxi based on VIS-NIR spectroscopy
Authors: Tong Wei , Liu Jinbao , Fei Liangjun , Sun Zenghui
Published: June 2020

This study takes soil Cr, Mn, Ni and Cu from the Guanzhong area as the research object. Using the ASD Fieldspec4 spectrometer to acquire soil spectra and perform different forms of data transformation, and partial least squares regression (PLSR) method was used to establish the calibration-validation model. The results indicated: (i) after the differentiation of the spectrum and the transformation of MSC, NOR, SNV, etc., the signal response strength is enhanced; (ii) The determination coefficients of Cr, Mn, Ni, and Cu are 0.7002, 0.7852, 0.6857, and 0.8036, respectively; (iii) The results show that the spectral predictive model have quickly obtain the distribution of heavy metals in the study area.
Research on Key Technologies of Environmentally Friendly Modern Building Science
Authors: Lu Zhengyan
Published: June 2020

The continuous development of China’s economic level and the increasing improvement of people’s living standards have directly promoted the development of China’s construction industry. However, in the construction of buildings, people often ignore the problem of waste of resources. To a certain extent, it also caused a lot of waste. Therefore, I believe that it is necessary to construct a scientific view of building energy conservation and apply it to actual building construction. Therefore, this paper addresses the problems of unclear scientific understanding of building energy efficiency and weak theoretical basis of engineering practice, and puts forward the necessity of the construction of a scientific view of building energy conservation and its application research. From the concept of energy, the development of building science, the development of building disciplines, and the connection between science, engineering, technology and industry, it reveals the inherent connection of building energy conservation science, building energy conservation engineering, building energy conservation technology and building energy conservation industry. Aiming at the characteristics of building energy as a social activity, the practice activity is constructed from the perspectives of the subject, object, content, and goals to form a multi-angle and multi-level understanding system of building energy efficiency. Form an epistemological system for building energy efficiency.
Study on heterogeneous catalysts for catalytic wet oxidation
Authors: Qiang Liu
Published: June 2020

Catalytic wet oxidation is a powerful method for the treatment of high concentration refractory organic wastewater. the support and catalyst components constitute heterogeneous catalysts, and the main catalyst, co-catalyst and co-catalyst components. The main catalyst and co-catalyst are the main influencing factors of the catalyst. The preparation methods of catalyst include precipitation method, impregnation method and impregnation precipitation method. The performance evaluation indexes of heterogeneous catalysts include the activity, stability, selectivity and anti-toxic stability, mechanical stability of the catalysts. according to the principle of chemical transfer, the heterogeneous catalytic reaction process consists of seven steps.
Preparation of heterogeneous catalysts based on CWAO technology
Authors: Zhang Yongli
Published: June 2020

Refractory-biodegradable organic wastewater can be effectively treated by catalytic wet oxidation (CWAO). The preparation of non-catalyst is the core of CWAO technology. The preparation methods of heterogeneous catalysts include precipitation method, impregnation method, precipitation impregnation method, sol-gel method and chemical deposition method. According to the different ways of adding metal solution and precipitant, the precipitation method is divided into positive addition method, reverse addition method and combined addition method. According to the impregnation amount, the impregnation method can be divided into equal amount and excessive impregnation method. According to the principle of chemical reaction engineering, heterogeneous CWAO reaction process can be divided into 7 processes, such as internal diffusion and external diffusion. CWAO method is expected to be applied and expanded in pesticide, printing and dyeing, papermaking and other industries.
Relationship between calcination temperature and performance of supported Pd-catalyst
Authors: Liu Qiang
Published: June 2020

In the experiment, the COD removal rate of water samples was used as the evaluation index of catalyst activity, and the dissolution concentration of metal ions was used as the evaluation index of catalyst stability, and the activity and stability of the catalyst were comprehensively evaluated. The Pd-catalyst was used to treat simulated printing and dyeing waste-water by CWAO, and the influence of calcination temperature on the performance of the catalyst was investigated. The results showed that as the calcination temperature increases, the decolorization rate of the catalyst treatment waste-water decreases, and the metal stripping concentration of the waste-water decreases. The COD removal rate of the waste-water at the set 6 temperatures was 87.84 %, 85.43 %, 84.72 %, 77.59 %, 68.04 % and 66.94 %. The dissolved Cu and Fe concentrations of the waste-water at 90 minutes were 0.46 mg/L and 49.22 mg/L. Pd-catalyst has good catalytic activity and stability.
An Investigation Report of Corporate Social Irresponsibility (CSIR)
Authors: Zhang Hua , Zhang Huaxi
Published: June 2020

CSIR refers to the case where corporations behave in an irresponsible way. As a comparison, CSR refers to good behaviours, which are the ones that can bring benefits to the society, while CSIR refers to bad behaviours, which are the ones that can bring severe damages or hazards to the society. In this study, concept and evaluation method of corporate social irresponsibility (CSIR) in China were investigated and a CSIR evaluation system that is suitable for China was established. Meanwhile, the current state of CSIR in China was described according to industry and region, based on investigations of second-hand data of listed companies. Additionally, data of different CSIR indices were collected and compared in order to provide guidance and suggestions for decision makers.
Research on User Experience Design Consistency of Internet Products Based on User Experience
Authors: Wang Ruonan , Zhang Xing , Yang Dong
Published: June 2020

In recent years, with the continuous development of network technology, our daily life has been inseparable from the Internet. The increasing popularity of various terminal devices has brought about a variety of system and screen sizes. How to maintain the consistency of user experience among a large number of device terminals has attracted more and more attention. As a bridge between human beings and Internet products, whether the interface design is satisfactory to users fundamentally affects the use of products, which is also a hot research topic at home and abroad. Based on the research of multi-screen interactive design, combined with the consistency theory and the construction method of consistent experience, this paper proposes to construct multi-screen interactive consistent experience by seeking commonness from the micro level and emphasizing the use of scenes from the macro level.
Genome-Wide Analysis of the Cytochromes P450 Gene Family in Cordyceps militaris
Authors: Lv Gongbo , Liu Xinping , Zeng Bin , He Bin
Published: June 2020

Cytochromes P450 (CYP450) gene family has been shown to play significant roles in various physiological processes of some species, including participate in the metabolism of various exogenous substances, synthesis of endogenous substances, abiotic and biotic stress responses and stress signaling. In this study, the members of CYP450 gene family in Cordyceps militaris (C.militaris) were identified and analyzed on the whole genome level using bioinformatics-based methods. The phylogenetic tree, gene structure, motifs and gene expression level under pH stress were analyzed. In total, 54 putative CYP450 gene family members were identified in C.militaris. The phylogenetic analysis indicated that all of the C.militaris CYP450 (CmCYP) genes, except CmCYP19, were grouped into 3 groups. The 54 CmCYP genes were randomly distributed on 7 chromosomes. The expression analysis of CmCYP under different pH environments showed the mechanism of CmCYP genes family involved in stress resistance regulation is complex and diversified. Systematic investigation of a gene family, would provide important insights into gene function and application. The results of this study will provide reference information for studying other abiotic and biotic stress response regulation mechanism of C.militaris.
Study on the Root Structure of Rehmannia glutinosa in Different Habitats
Authors: Wang Jian , Gao Shiqian , Li Juan
Published: June 2020

The free-hand section comparison of the roots of Rehmannia glutinosa in different habitats shows that the root structure of Rehmannia glutinosa in different habitats is significantly different: the test group (salt environment) has a thinner pericarp, smaller cells and tightly arranged cells; The cortical cells are small and dense; the xylem cells of the vascular column are larger, the ducts are thin and the myelin rays are obvious. In the control group (normal habitat), the rhizomes of rhizome glutinosa had thick pericytes, large cells and loose arrangement; the cortical cells were large and loosely arranged; the volume of xylem cells in vascular columns was relatively small, the ducts were thick and few, and the myelin rays were not obvious.
Research on Forecasting of China’s Monetary Policy Based on Random Forest Algorithm
Authors: Qiu Chuanxin , Li Tong , Qiu Xuelin
Published: June 2020

This paper uses the random forest algorithm model to quantify and predict the monetary policy of the People’s Bank of China under the input of 16 macroeconomic indicators. It is compared with three other machine learning algorithms (CART decision tree, support vector machine and neural network algorithm), discrete selection model and combined prediction model. The results show that the random forest algorithm shows better prediction accuracy in predicting the direction of the central bank’s monetary policy.
Synthesis and Study on Thermal Stability of PMMA Microspheres by Emulsion Polymerization
Authors: Liu Longjiang , Xiang Pengzhi , Huang Yao
Published: June 2020

Polymethyl methacrylate (PMMA) was prepared by emulsion polymerization using methyl methacrylate (MMA) as monomer, potassium per sulfate as initiator. Polymethyl methacrylate/mesoporous molecular sieve composite (PMMA/MCM-48) was synthesized via the addition of mesoporous molecular sieve MCM-48 silica nanomaterial. The synthesized samples were systematically characterized using XRD, SEM, TEM, FT-IR, and TG. The results showed that PMMA microspheres with a diameter of 80-110 nm were prepared by emulsion polymerization. Compared with pure PMMA, PMMA/mesopores molecular sieve MCM-48 composites have good thermal stability. Pure PMMA microspheres can be completely decomposed at a lower temperature (400°C), and the thermal stability of PMMA/MCM-48 composites were improved by the addition of mesoporous molecular sieves.
Synthesis, Optical and Electrochemical Properties of Two Series Electron-Donor Polymers with Diphenylpyranylidene Side Chain
Authors: Tian Wen-Ting , Bolag Altan , Bao Tana , Ning Jun , Alata Hexig , Ojiyed Tegus
Published: June 2020

Two series of novel conjugated polymers with diphenylpyranylidene as the side chain and thiophene as the main chain were designed, synthesized and characterized as electron donors of polymer solar cells for the first time. The absorption spectra showed that introduction of diphenylpyranylidene side chain can obviously complement the light absorption ability in the range from 300-500 nm. In addition, diphenylpyranylidene unit is also helpful to tune the HOMO energy level as low as -5.23 to -5.31 eV than P3HT polymers, for favoring higher open-circuit voltage in polymer solar cells.
Theory and method of project post-evaluation
Authors: He Jing , Lei Na
Published: June 2020

Project post-evaluation is the service extension after the completion of the project and an important part to be considered in the whole life of the project. This paper briefly introduces the theory, method and content of the post-evaluation of engineering projects in order to provide reference for the post-evaluation of engineering projects.
Applications of Monte-Carlo method for risk assement of buildings at service stage
Authors: Hui Zhang , Xiaobing Song
Published: June 2020

Monte-Carlo method is considered to be an efficient risk analysis method, but the method is seldom used in the field of buildings at service stage. This paper recognizes major risks of buildings at the stage and provides a risk assessment Monte-Carlo model. The model can be used for regional evaluation of buildings and assessment of important risks, serving for formulation of pertinent measures.
Flutter Controlling Effect and Mechanism of Central Stabilizer of Liu Jiaxia Bridge
Authors: Jiang Xiujuan , Wu Junyan , Liu Jianxin
Published: June 2020

Wind-induced vibration is the constraint of large-span bridge design; search for effective inhibition of wind-induced vibrations of bridge aerodynamic measures is particularly important. Through combination of wind tunnel experiments and theoretical analysis, the effectiveness of the central stabilizing plate on the wind-induced vibration control of Liu Jiaxia bridge and controlling mechanism were analyzed. The main contents are as follows: The original truss bridge section flutter test performance does not meet the requirements of the wind speed, through a variety of control measures flutter selection, the results show that the measures of central stabilizer plate has better inhibition of vibration. Through the wind tunnel test, the measures of central stabilizer plate on the impact of the truss bridge aerodynamic derivatives were researched. Aerodynamic derivatives

A

2

*

is reduced with the wind speed increases of good aerodynamic shape of the cross section, the absolute value is large than the original cross-section; By using two-dimensional three degrees of freedom coupling flutter analysis method, the law of development of twisting motion aerodynamic damping and flutter morphology were analysis. The performance of the main beam flutter was improved through icreasing torsional movement of pneumatic positive damping A, reducing torsional coupling movement implicated generated aerodynamic negative damping term D or enhancing the level of participation in the sport of vertical curve shape of flutter effective vibration control.
Review of Reflection Cracking Preventive Technologies on Asphalt Pavement with Semi-Rigid Base Course
Authors: Su Peifeng , Li Miaomiao
Published: June 2020

Semi-rigid base course is widely applied in pavement construction. However, because the inorganic binder tends to be affected easily by environmental factors (temperature, moisture), the cracking of semi-rigid base course is a serious problem, which causes reflection cracks on the surface layer. That is one of the main damage types of this kind of pavement structure. In view of the above problems, scholars all over the world have carried out researches on the cracking mechanism and the causes of cracks. Combined with engineering practices, various kinds of reflective crack prevention technologies have been proposed. In this paper, the author systematically investigates the existing retarding methods. According to their characteristics, it is mainly divided into three categories: surface anti-cracking treatment, base anti-cracking treatment and stress absorption structure addition. Meanwhile, the main principles and effects of these three categories of measures are analysed and summarized to provide the reference for subsequent study and design.
Optimization Design of Single Stage Cylinder Driven Rope Linkage Cantilever of Endoscope Device
Authors: Tao Juanjuan , Tao Haohao , Jia Zhongning , Jiang Zhuoting
Published: June 2020

Aiming at the problem of the detection of the inner wall surface of solid rocket motor, the design expansion of the existing endoscope detection device cantilever has reached 3.5m. In order to meet the measurement accuracy requirements, the static and modal analysis and optimization of the stepping motor, industrial camera and the whole cantilever are carried out based on the ANSYS software analysis platform. Ensure that the mechanical characteristics of the cantilever can meet the requirements, and ensure that the working frequency of the motor avoids the natural frequency of the cantilever, so that the shooting environment of the industrial camera is relatively stable, and the resonance will occur when it is detected. Therefore, optimize the design of the device, increase the damper to reduce the vibration of the device, so as to achieve the normal operation of the device.
Advanced Detecting Technologies for Aging Performances of Composite Insulators
Authors: Zheng Jianjun , Tian Feng , Chen Hao , Shi Xianda , Yu Xiao
Published: June 2020

As common electrical equipment, composite insulator played an important role on the safe and stable operation of transmission lines. Hence, it was meaningful to explore effective methods to detect the service performances of operated composite insulators. In this paper, several advanced technologies were introduced to check the performances of in-serviced composite insulators. The macroscopic properties were mainly detected by means of X-ray digital imaging system, ultrasonic phased array (UPA) and hydrophobicity measurement. In addition, the microscopic properties were analysed by the way of scanning electron microscope (SEM) observation, microscopic infrared spectral imaging system and thermogravimetric (TG) analysis. It was believed that defects such as micro-cracks, gaps etc. could be earlier and quickly found by using these detection techniques, thereby avoiding power failure accidents of the transmission lines.
Dynamic Simulation and Analysis of 2Z-X (A) Four Stage Series Planetary Gear Train
Authors: Bao Zhongfu , Zeng Dejiang
Published: June 2020

In order to understand its dynamic characteristics in operation, a four-stage 2Z-X (a) planetary gear train was simulated based on ADAMS. The simulation uses the solid contact model to analyze the meshing force vibration of the gear train under the condition of constant speed and variable speed, and uses FFT to understand the frequency characteristics of the gear train meshing. The research provides the basis for the follow-up design and optimization.
Preparation and homogeneity of polymer mud of underground diaphragm wall
Authors: Kai ChunMei , Zhang FengJun , Xie WenJie , Ma Jie , Chen QianBao
Published: June 2020

The preparation of homogeneous polymer mud has an important role in the underground diaphragm wall engineering. A homogeneous polymer mud of underground diaphragm wall was synthesized by a simple compounding method in this work. The prepared samples analyzed by infrared spectroscopy. The effects of different film-forming auxiliaries, thickening components and pH on the homogeneity of the diaphragm wall were studied through the measurement of viscosity and specific gravity. The results showed that the prepared polymer mud of underground diaphragm wall had the best homogeneity and stable viscosity in the following conditions: in the pH range of 8-10, the addition of bentonite as a filming auxiliary with 5 kg of puffing agent per ton, and the dosage of vegetable gum was about 10-20 kg in every 100 m3 of mud. The possible reasons of affected homogeneity were suggested.
Preparation and Structural Characterization of Bis (N, N’-phenanthroline)- bis (O, O’-nitrate) Cd (II) Complex
Authors: Zhao Meili
Published: June 2020

An eight-coordinated Cd (II) complex, bis (N,N’-phenanthroline)-bis (O,O’-nitrate) Cd (II) (1), was synthesized using 1, 10-phenanthroline and cadmium nitrate tetrahydrate as raw materials. The structural analyses of Cd(II) complex 1 shows that the compound 1 belongs to monoclinic, space group C12/c1 (no.15) with a = 11.4490(5) Å, b = 15.3716 (6) Å, c = 13.2153 (6) Å, β = 102.892 (5)º, V=2267.13 (17) Å3, Z = 4, Dc = 1.749 mg·m−3, μ = 1.020 mm−1, F(000) = 1192, and final R1 = 0.0392, ωR2 = 0.0827. The Cd (II) complex 1 forms 1D chained structure by the π-π interaction of phenanthroline rings..
Heat transfer analysis and thermal bridge elimination of composite thermal insulation exterior wall adjacent to steel column
Authors: Gong Chao , Wu Zhaoqi , Ke Donghai
Published: June 2020

Steady-state heat transfer of built-in composite insulation walls close to column had been investigated in this paper by using finite element analysis (FEA). Firstly, the thicknesses of the wall and the thermal insulation were determined according to energy saving requirement of 75%. The heat transfer of the wall with the commonly used details was studied and it was found although adding local insulation on the outside of the column can improve the heat flow concentration, there is still a thermal bridge at the junction of the wall and the column. Then the influence zone of the thermal bridge was investigated and a construction measure of extending the local insulation width was proposed based on the analysis results. Lastly, the partial thermal insulation extended widths for different column sections and thermal insulation were suggested to break thermal bridge completely, which can meet the energy saving requirement of Beijing government.
Research on Ultrasonic Detection of Air Spring Rubber Debonding based on CEEMDAN
Authors: Hou Dawei , Wang Xuemei , Ni Wenbo
Published: June 2020

The SYS510e air spring of electric multiple unit (EMU) is the metal and rubber bonding structure. In order to carry out ultrasonic debonding detection on the tapered bonding interface, after correcting the interference caused by sectional thickness change, the complete ensemble empirical mode decomposition with adaptive noise (CEEMDAN) and cross approximate entropy (ApEn) method was applied to analyze time frequency characteristics of echo under different bonding conditions. Five numbers of cross ApEn features were extracted to identify rubber debonding defect. These features are more stable and show more significant discrepancies between bonding and debonding states. Then BP neural network was trained to identify the debonding state of the tapered interface of air spring. The results of ultrasonic C scan show that the ultrasonic detecting method based on CEEMDAN and cross ApEn can accurately and effectively identify the location and contour of rubber debonding defects, and meet the needs of the debonding detection of SYS510e air spring of EMU.
Unanticipated Fault Detection Technology for Tip/Tilt Mirror Control System of Large Aperture Telescope
Authors: Wu Jiajia , Yang Shihai , Li Yun
Published: June 2020

Large Aperture telescopes are usually placed in some special environment. Once a malfunction occurs, it’s inconvenient for maintenance. This paper presents those unanticipated failures in tip/tilt mirror control system of large aperture telescopes, and tries to propose a detection strategy based on BP neural network. Firstly, the paper analyses the failure mechanism of the software and the hardware of the tip/tilt mirror control system. Then the known fault data are used to train the BP neural network in order to obtain an accurate detection model. Finally, the unanticipated data are mixed into the known fault data, and the model is used to detect unanticipated faults. The simulation results show that the model can be used to detect the unanticipated fault in tip/tilt mirror control system effectively.
Development of Vehicle Fault Maintenance System Based on Unity3D
Authors: Zhang Xiao , Chen Fuen
Published: June 2020

With the rapid development of computer and artificial intelligence technology, the application scene of technology has changed from two-dimensional space to three-dimensional space. In the field of vehicle fault maintenance, virtual reality technology can provide a variety of solutions. With the increasing technical content in armored vehicles, it is urgent to train a group of professional maintenance personnel for maintenance operations. This paper analyzes the common problems of armored vehicle system and the method of simulation maintenance. It uses 3d max and Maya software to model and introduce the model into Unity3D to build the scene. Finally, C# language and VRTK were used to write scripts to realize human-computer interaction, and the maintenance system was constructed through testing. By constructing this system, various practical problems in the maintenance training of armored vehicles are solved.
Research on Partial Discharge State Detection in GIS Based on Internet of Things Technology
Authors: Zhang Zhaohui , Yang Jinggang , Jia Jun , Hu Chengbo , Liu Ziquan , Li Yujie
Published: June 2020

With the continuous development of the Internet of Things technology, the Internet of Things technology can be used in many aspects of the smart grid. Apply advanced Internet of Things technologies in substation GIS, including sensing technology, network communication technology, intelligent decision-making technology, automatic control technology, and energy and power technology, etc., and combine them closely to form a coordinated organic system. At present, partial discharge is the main cause of equipment insulation deterioration in substations. Partial discharge detection and evaluation has become an important means of monitoring insulation conditions. The monitoring of GIS partial discharge conditions in substations can help find insulation defects in GIS in time, avoid insulation failures, and improve the safe operation of GIS. It is possible to achieve GIS insulation condition maintenance, reduce power outage time and save maintenance costs. The effective application of the Internet of Things technology in the GIS partial discharge state detection system of intelligent substations can effectively improve the construction of modern intelligent substations in China.
Development and Practice Development and Practice of Comprehensive Water Control Technology for Volcanic Bottom Water Gas Reservoir in Xushen Gas Field
Authors: Kang Wu
Published: June 2020

Xushen gas field mainly exploits volcanic reservoirs of Yingcheng Formation. The gas reservoir type is mainly the bottom water gas reservoir. The number of water wells and water production are increasing year by year, which affects the development effect of the gas field. In view of the increasingly severe situation of water invasion and water production in gas fields, water invasion evaluation and comprehensive water control of gas reservoirs have been carried out, and a three-level evaluation process of water invasion qualitative identification, water invasion quantitative evaluation and water invasion impact quantitative evaluation has been formed. Based on the results of water invasion evaluation, combined with the characteristics of gas reservoir connectivity, structure, gas-water distribution, and water production, the three-level evaluation process has been formed. The integrated water control mode of the block (volcanic body) and single well water control mode by classification have been applied in each block, and good results have been achieved, which effectively supports the rational development and long-term stable production of bottom water gas reservoirs in Xushen gas field.
Evaluation of horizontal well productivity in the abnormal high pressure and low permeability gas reservoir in the west of the South China Sea
Authors: Ma Yongxin , Li Mingjun
Published: June 2020

Based on the actual geological reservoir characteristics of an abnormally high-pressure gas reservoir in the western South China Sea, and considering reservoir stress sensitivity, a single-well model for horizontal wells was established to study the law of non-steady-state productivity of horizontal wells. Based on the established single well model of horizontal wells, and considering stress-sensitive conditions, the rational allocation of single wells is studied. The research results show that the initial unobstructed flow rate of the horizontal well is high and it decreases rapidly; the non-resistance flow considering stress sensitivity is lower than the non-resistance flow without considering stress sensitivity. The difference between the two gradually reaches the maximum at the beginning of the well, and the difference gradually decreases at the later stage; there are interrelationships and constraints between single good production, stable production time, and final production.
Research on recoverable reserves of single well control in Daqing peripheral oilfield
Authors: Xue Rui
Published: June 2020

This paper analyzes the law of developed single well control recoverable reserves in the Daqing peripheral oilfield through a large number of dynamic and static data of this area. Based on the influencing factors of single well control recoverable reserves, the empirical formula of exploiting Putaohua oil layer and Fuyang oil layer in Daqing peripheral oilfield was established. The formula has high precision and can meet the needs of forecasting area recoverable reserves.
Research on Educational Management Strategies of College Students, who was born after 2000 in Energy Major
Authors: Fang Zhi
Published: June 2020

The new generation of post-00s has quietly entered university campuses, and higher education faces new challenges. This article takes undergraduates majoring in energy as the observation object. Through individual interviews, questionnaire surveys, activity evaluations and other methods, we analyze and study their growth background, ideological behavior characteristics, and finally we propose targeted education management strategies.
Research on Intelligent Manufacturing of Coal Machine Equipment Based on Computer Informatization Coal Machine Equipment
Authors: Zhang Jiuqin
Published: June 2020

Coal preparation can remove most of the impurities in raw coal, reduce ash, and improve coal quality. Reducing the ineffective transportation of vermiculite, reducing the environmental pollution caused by burning coal, and providing the basic guarantee for the further clean and efficient use of coal are the foundation of clean coal technology. The domestic status of the automation technology of the coal preparation plant is introduced, and the issues needing attention in the automation technology of the coal preparation plant in China are introduced. Briefly describe the main contents of the current coal preparation plant automation technology and the issues needing attention in the control loop, and the possible consequences of an unreasonable design of the coal preparation plant automation system. By analyzing the development trend of the automation technology of the coal preparation plant, the broader development prospects of optimal control and video surveillance substation technology are expected. The scientific development of the coal preparation plant is to make full use of advanced coal preparation technologies, processes and equipment, improve the raw coal selection rate, continuously improve and improve the process, develop and introduce new efficient and high-yield washing equipment, and improve automation, professionalism, and informationization. And intelligence
Research and Application of Fine Intelligent Injection Technology of Cable Type in Dagang Oilfield
Authors: Wang Wentao , Zhang Hongwei , Yang Tiancheng , Shu Chang , Hu Jintong
Published: June 2020

Dagang oilfield belongs to typical multi-layer system, heterogeneity of complex fault block reservoir, reservoir and the large difference of physical property of crude oil, water, etc, the longitudinal permeability difference is obvious, separate injection interval is not detailed, The existing bridge eccentric note, bridge concentric injection technology can’t meet the needs of the fine water injection, real-time measurement and control because of drift, well depth, pressure and other factors, and there is poor adaptability, measuring problem of long time and low efficiency. Cable type fine intelligent water injection technology in underground intelligent water distributor, the ground controller as the core tools, cable as transmission medium, the computer network communication technology, intelligent control technology combined with oil field water injection demand, developed a new and reliable water injection system, realized the layered injection allocation under different deviation, full automatic control and monitoring data, and direct reading test. The technology in the implementation of 5 Wells in dagang oilfield, the implementation of maximum deviation 80 °, the maximum depth of 3661.52 m, the highest water flooding pressure 25 mpa, construction success rate reaches 100%, downhole test times 5 Wells, inspection accuracy of 100%. The results show that the cable type intelligent water flooding technology can not only realize downhole data real-time monitoring, real-time traffic regulation, and can complete the packer direct reading test, and the measurement process is reliable and efficient, at the same time solve the high Angle well, horizontal well can’t test the technical problem, provides the high Angle well, horizontal well fine water injection technology support.
The Analyses of 45-Degree Bunsen Burner Test and Oil Burner Test for Cargo Liners
Authors: Wu Shuang , Lv Zhengye , Ding Kun , Huang Weixing , Li Gen , Hou Zhenguo , Ni Junfei , Ke Yichun , Huang Hongzhai
Published: June 2020

Since the last century, the challenges caused by fire prevention of cabin and cargo compartment materials were increased year by year. As one of main part for cabin and cargo compartment materials, the flame penetration resistance ability of cargo liners was become a research focus. However, the 45 degree combustion test and oil burner test (which were used to test flame penetration resistance ability of the cargo liners) are quite similar in experimental scale and experimental conditions, which can cause great trouble for the research of the flame penetration resistance ability of cargo liners. Thus, the differences between 45 degree combustion test and oil burner test were discussed in this paper.
A model-driven system interface design method based on MVC pattern
Authors: Feng Xiaoxia , Liu Wansheng , Jiang Yu
Published: June 2020

In Electronic optical tracking system human-machine interface design process is used to simulate the console more digital implementation, not for a variety of interface between model design and model conversion problems and analyzing the availability of this situation, this article based on the interface of model-driven development research field, puts forward a new model based on the drive and friendly human-computer interaction interface design framework, studied how the presentation model set and using the MVC pattern of the organization’s program tools, in addition to the view model independent from the general MVC pattern, add visual information structured design module. At the same time, the feasibility and advantages of the new framework are proved by an example.
The evaluation and comparison on different types of resident doctors in training through DxR Clinician system
Authors: Dong Leilei , Li Wei , Ma Dedong , Lv Chenguang , Chen Cai
Published: June 2020

Compared with the traditional problem-based learning (PBL) mode, computer-based case simulations (CCS) are more advanced in aspects of clinical reasoning, critical thinking and clinical thinking. CCS program, Diagnosis & Reasoning (DxR) Clinician, has been used for assessment of clinical diagnosis and treatment skills in more than 300 medical colleges and universities around the world. However, the evaluating effectiveness and practicability of this software continue to be uncertain and ambiguity in China. Moreover, the influence factors of the DxR evaluation score are still remain indefinite. The purpose of this study was to investigate the impact of training years, professional background and educational background on DxR scores in order to better improve the clinical skills of residents. Eighty one resident doctors were selected as the experimental subjects to conduct the clinical skills assessment with DxR Clinician. The relationships between residents’ scores in DxR Clinician components (overall score, diagnostic score, and management score) and their training years, professional background and educational background were analysed using simultaneous regression. The results showed that years of training, professional background and educational background are potential influence factors of DxR evaluation score. The average DxR Clinician scores in this study are generally lower than foreign research, so we should strengthen resident standardized training to improve our clinical skills.