bluuebunny/crossref_metadata_2025 huggingface dataset:
Digital technology risk reduction mechanisms to enhance ecological and human safety in the northern sea route for oil and gas companies
Authors: Bianco Ishel , Ilin Igor , Iliinsky Alexander
Published: May 2021

Climate change has removed large quantities of ice and has removed impediments to Arctic sea navigation and in doing so has opened up a new route. Most of these ice-free routes can be used for navigation including oil and gas logistics and transportation and reducing transit by more than 5000 nautical miles. While these events allow for a widening of transportation routes but many challenges naturally inherent to the Arctic are still present, for example, the risk of possible oil spills in the very sensitive ecosystem and the safety risks to crew and equipment. New Technology offers more thorough ways to minimize and manage this risk and to preserve the integrity of ecosystems, safety of people and the profits of companies where operations are more cost sensitive and difficult than in other regions of the world. This paper proposes one model of risk reduction and evaluates the best ways to reduce ecological and safety risks of oil and gas companies operating in the Arctic route. It also proposes methods to incorporate digital value into the organization through four sectors, Sustainability, Efficiency, Accountability and Profitability.
Population’s willingness to separate collection of plastic waste in Russian city
Authors: Rozhentsova Elena , Saltykova Anastasiia , Tretiakova Elena
Published: May 2021

This paper examines people’s willingness to separate collection of plastic waste. The study is based on a questionnaire survey of Perm residents and visitors, the data were analyzed using econometric methods. We identified key factors that determine the ecological behavior of people - the importance for a person of the benefits that he carries for the environment, the willingness to devote personal time to measures to protect it and awareness of the environmental harm of plastic waste. On average, all things being equal, an individual’s awareness of the environmental hazards of plastic leads to increase the probability of his participation in the separate collection of plastic by 11.78%. On average, all things being equal, the proximity of containers for separate collection of plastic waste increases the probability that a person will participate in the separate collection of plastic by 45.57%. It should be noted that the probability of participation in a separate collection is lower for men than for women, all things being equal. Also, all things being equal, the probability of participation in the separate collection of plastic increases with age by 0.3%.
Revision of stoneflies (insecta: plecoptera) fauna in Uzbekistan
Authors: Lebedeva Natalya , Akhmedova Zukhra , Kholmatov Bakhtiyor , Jumaev Rasul
Published: May 2021

This article presents data on the study of the fauna of Plecoptera watercourses in Uzbekistan. On the basis of original collections of larvae/nymphs and adults of stoneflies and data from literary sources, a revision of the fauna of stoneflies of Uzbekistan was carried out, which currently numbers 48 species belonging to 19 genera and 7 families. Among them, endemic species were identified, first identified for Central Asia and for Uzbekistan.
Regional grid energy storage adapted to the large-scale development of new energy development planning research
Authors: Yang Jingying , Lu Yu , Li Hao , Yuan Bo , Wang Xiaochen , Fu Yifan
Published: May 2021

After the carbon neutral target is proposed, China’s new energy will usher in a leapfrog development, and its volatility and randomness put forward higher requirements for the flexibility of the power system. Energy storage has strong flexible adjustment capabilities. With the continuous improvement of technology and economy in recent years, it has been promoted and applied in all aspects of the power system, and its value in improving system flexibility is gradually reflected. This paper satisfy the power balance system and new energy given perspective, aiming at the lowest cost of power supply, regional energy storage size optimization model is put forward, with a actual regional power grid as an example, has carried out empirical research, quantitative analysis of correlation between the development of new energy and energy storage scale and verify the model is scientific and accurate.
Research and Application of Solar Energy Heating System for Individual Household in Western Sichuan Plateau
Authors: Li Ling , Zhou Jiri
Published: May 2021

In terms of the existing solar heating system, its structure and control system are too complex and heat storage unit is too large, which makes it suitable for public buildings with large plot ratio or concentrated residential areas etc. But it is not suitable for rural residences with abundant solar energy resources, backward economic condition and scattered distribution of inhabitation. In this paper, we improve, optimize and integrate the existing solar heating system and design a new simple and reliable household solar heating system. In addition, we verify it by indoor temperature test and calculation of solar fraction in an actual project.
Research on Ash Clogging of Rotary Air Preheater in Coal-fired Power Plant
Authors: Zhang Boxu , Li Qi , Ding Shilong , Lv Bowen
Published: May 2021

The air preheater of coal-fired units has the problem of ash blocking. Combining the working principle and ash blocking mechanism, FLUENT uses the porous media model to simulate the air preheater, and the corresponding mass flow rate at different speeds or air side inlets is obtained. The temperature results are compared and analyzed, and a reasonable air preheater is used to reduce ash clogging.
Modeling of Electric Vehicle Charging Load in Different Areas of Distribution Network
Authors: Jiang Zhou , Zou Hairong
Published: May 2021

This paper presents a method of forecasting and modeling of electric vehicle charging load in different regions of distribution network. Firstly, the fixed factors affecting the charging load of electric vehicles are analyzed. The electric vehicles are divided into pure electric and plug-in hybrid electric vehicles, and the charging equipment is divided into ordinary charging equipment and fast charging equipment. Then, the behavior characteristics and psychological factors of electric vehicle users are considered as the random factors influencing the charging load, the investigation statistics and hypotheses are carried out. Finally, the distribution network is divided into different regions, and the charging load model of each region is established based on Monte Carlo simulation. The established model shows that with the increase of penetration rate of electric vehicles in the future, large-scale charging into the power grid will cause impact load in different regions of the distribution network at different times, which provides some reference for the suppression of voltage fluctuation in distribution network.
Study of heat pipe in motor cooling: A review
Authors: Chen Zutao , Yu Zhongjun , Fu Jia , Liu Bin
Published: May 2021

The heat pipe as one of the most efficient heat exchanger device is used in many thermal engineering applications. Through sufficient literature research and summary, a comprehensive and systematic analysis of the application of heat pipe cooling technology in motor cooling is provided. The basic principles and key technologies of heat pipe cooling technology is introduced. What’s more, various factors affecting the cooling efficiency of heat pipes and two main types of heat pipe applications in motor cooling are discussed. Finally, the current status of research on heat pipe cooling motors at home and abroad are reviewed.
Wind-resistant optimization design of large storage tanks in island-type petrochemical parks
Authors: Hu Haoran , Guo Jian , Hong Bingyuan , Yan Yan , Yang Xu , Zhu Baikang
Published: May 2021

Due to the thin-walled wind-sensitive structures of large crude oil storage tanks, it is necessary to consider the wind load failure of oil storage tanks in coastal areas under strong wind conditions during the design process. Based on the finite element analysis software ANSYS\Workbench, the static structure analysis and buckling analysis of the 100, 000 cubic crude oil storage tanks are carried out. In order to solve the buckling failure phenomenon, a wind-resistant ring structure was optimal designed for the crude oil storage tank according to standards, so that the storage tank can withstand hurricanes and typhoons above level 12 with a wind speed of 137 km/h.
Study on the Effect of Standardization on Energy Demand and Economic Growth
Authors: Liu Ren , Wang Zhonghang , Chen Haihong , Yang Jie
Published: May 2021

The 14th Five-Year Plan is the first five-year period in which China begins a new journey to build a modern socialist country in an all-round way, and also the first five-year period after China set a goal of achieving carbon neutrality by 2060. In this important historical context, the energy development of China during the 14th Five-Year Plan period will be of great historical transformation significance. As a crucial factor, the trend of energy development during the 14th Five-Year will have a direct impact on the medium and long-term economic and social development, as well as on our confidence in achieving the goal of carbon neutrality. The improvement of standardization is conducive to promoting China’s energy demand and economic growth, and it plays an important role in peaking carbon dioxide emissions and reaching the goal of carbon neutrality in the future.
Measurement and Analysis of Urban Total Factor Energy Efficiency in China
Authors: Lu Feifei , Lu Yinling , Lei Na
Published: May 2021

The improvement of urban energy efficiency is of great significance to reduce carbon emissions and achieve China’s goal of carbon peak in 2030. Taking 266 cities as the research objects, the energy efficiency of each city is measured by Super-SBM model. Then the energy efficiency is decomposed by Malmquist index. The results show that: In 2006, the number of cities in high-efficiency areas is small and high efficiency areas are mostly distributed in the northeast and southeast coastal areas. There was a phenomenon of low efficiency areas agglomeration. But in 2017, the number of high-efficiency cities increased significantly. The number of high-efficiency cities in Northeast China increased, the number of high-efficiency cities in Southeast coastal areas decreased, and the number of high-efficiency cities in Central China increased and showed a phenomenon of agglomeration of high-efficiency areas or relatively high efficiency areas. According to the decomposition of urban energy efficiency, technological progress is the main driving force for the improvement of energy efficiency, and the decline of technical efficiency inhibits the improvement of energy efficiency in various cities.
Technology of reusable assembly power pipe trench and temporary road system
Authors: Wang Chenglin , Tian Wei , Dong Wanduo
Published: May 2021

Based on the current situation of the temporary pipelines with disorderly layout and low integration, the temporary roads with time consuming, material consuming and environmentally unfriendly in, construction site, a new type of reusable assembly power pipe trench and temporary road system technology is proposed in this paper. The research background and research ideas of the technology are described; the partition, structure and connection of the system are designed; the stress of the system is checked by finite element method, and the main stress structure is optimized. The system has the advantage of high degree of integration, convenient transportation and installation, and high reusability, and it is in line with the modern construction concept of carbon emission reduction, green construction and civilized construction.
Study of start-up decoupling controller for modular multilevel converter
Authors: Zhang Xinlin , Zhang Yanchi , Xie Da , Zhao Bowen
Published: May 2021

Modular multilevel converters are widely used in power systems because of their significant advantages. In this paper, a dynamic mathematical model is established by analyzing the topology, operating principle and switching function of the modular multilevel converter, so as to construct an inner and outer loop decoupling controller in dq coordinates. The carrier phase-shift pulse-width modulation is selected to control the sub-module operation, and the uncontrolled pre-charging method is adopted to charge the sub-module. Finally, simulation experiments are carried out in MATLAB/Simulink, and the results show that the control method achieves smooth start-up of the modular multilevel converter.
Improved harmonic detection method based on ip-iq theory
Authors: Yao Zhisen , Gao Guige
Published: May 2021

Based on the traditional ip-iq harmonic detection theory, the accuracy of harmonic detection is easily affected by the phase-locked loop (PLL) output phase error, and the single low-pass filter (LPF) detection accuracy and filtering effect cannot be simultaneously. In this paper, an improved harmonic detection method based on the second-order generalized integrator-frequency locked loop (SOGI-FLL) technique is proposed to generate sine and cosine signals with the same frequency as the grid voltage; The traditional low-pass filter and average filter are used in series to improve the response speed and accuracy. Through theoretical analysis of the improved harmonic detection method and simulation in MATLAB environment, the theory and simulation results prove the effectiveness of the improved method.
Abnormal Power Consumption Detection Based on Data-Driven
Authors: Jiang Jianfeng , Zhu Wenjun , Wang Xingang , Zhang Chong
Published: May 2021

Based on high dimensional random matrix theory and machine learning algorithm, a method to detect abnormal power consumption behaviour of users is proposed. Firstly, the K-means clustering algorithm is used to divide the power loads into load types that obey specific distribution law or with random fluctuation. Then the linear eigenvalue statistics (LES) index can be used to detect the abnormal power consumption behaviour for the former such as unimodal load or bimodal load. And the difference between the actual and predicted value of regression model based on XGBoost algorithm can be used as the basis for judging abnormal power consumption behaviour of the latter. The method proposed in this paper is applicable to different types of loads and can implement a good discriminant effect.
The Influence of Decentralized Wind Power on the Characteristics of Distribution Network
Authors: Jiang Ruomeng
Published: May 2021

This paper expounds the influence of decentralized wind power on the characteristics of distribution network. Through analysis, it can be concluded that after installing an appropriate amount of decentralized wind power, the voltage level of load bus can be improved. The power flow distribution will be changed, and the network loss of the power grid will be reduced. The decentralized wind power has also brought about negative impacts, such as voltage flicker and harmonics, the impact on the scope and direction of protection of relay protection, and greater uncertainty in the planning and operation of regional power grid. The analysis above provides some theoretical guidance for the large-scale development of decentralized wind power in the future.
Research on Life Prediction of Fan Spindle Bearing Based on Gated Recurrent Unit Neural Network
Authors: Ma Jianeng
Published: May 2021

In order to solve the problems of redundancy calculation and inefficiency of traditional machine learning algorithm in dealing with large amount of historical data of fan, a new predictive algorithm based on gated recurrent unit (GRU) is proposed to predict the remaining service life of fan spindle bearing. Firstly, the vibration history data of the main shaft bearing of the fan is analyzed to find out the relationship between the characteristic value and the remaining life, and the characteristic parameters which can reflect the remaining life are selected; Then, GRU is used to build the remaining service life prediction model of spindle bearing, and the main parameters of the model are adjusted to improve the prediction accuracy of the model. Compared with long short term (LSTM) algorithm, GRU is an effective tool to deal with a large number of data sets.
Research on Anti-Offset Characteristics of Static Wireless Charging for Electric Vehicles
Authors: Zhang Bingqian , Zhang Haiyan
Published: May 2021

The static wireless charging of electric vehicles is more convenient than traditional charging methods, but due to man-made parking will cause the coil to shift, which will cause the transmission power of the system to fluctuate and affect the stability of the system. Through the analysis of the traditional doublesided resonant system, it is found that it is more sensitive to the coupling coefficient k and the primary current will increase suddenly when k approaches zero. In order to solve these two problems, this paper compares four different resonance conditions and performs a large number of simulation experiments show that the antioffset performance of the system is the highest when both the primary and secondary sides are designed to be detuned, but a certain efficiency is sacrificed. When the bilateral detuned system is in the range of 2.4 times the coupling coefficient k, then the fluctuation of transmission power is less than 15%, and the maximum transmission efficiency is 58%. It has good anti-offset ability. And when k approaches zero, the primary current will not increase suddenly. The security performance of the system is greatly improved.
Hyperspectral analysis of shale gas drilling in southern Huangling anticline
Authors: Liu Pengfei , Zhao Yingjun , Guo Tianxu , Zhang Hongda
Published: May 2021

In this paper, the visible near infrared, short wave red, and thermal infrared spectral data and high-definition core images of three wells in Huangling anticline in Western Hubei are obtained by hylogger. Through comprehensive analysis, it can be seen that the thickness of Niutitang Formation is decreasing from west to East, However, the thickness of Doushantuo Formation is basically the same, ranging from 210m to 220m. Quartz, clay minerals, carbonate and limonite are the main minerals in Niutitang formation, while in Doushantuo Formation dolomite is the main mineral. Dolomite fracture is developed in this area, which is a favorable area for shale gas development.
Study on talent educational reform model of new energy automation based on big data
Authors: Huo Yan , Yang Guangying
Published: May 2021

For the situation of energy depletion, the development of clean energy and powder has become a trend in the future. In order to explore the talent training for new energy automation, an innovative education model needs to be established to constitute an oriented training system from many aspects of teaching and learning based on big data. With modern information technology, the education hierarchical methods under the principle of society demand are used. The potential opportunities and challenges of new energy automation training is comprehensively analyzed, and the big data, feasible curriculum system and education modes are discussed. From the perspective of big data, the teaching strategies and teaching contents for the model based on big data are given respectively.
Determining the Composition of Imported Recycled Plastics with Differential Scanning Calorimetry
Authors: Luo Chuan , Zhang Chao , Xu ShanHao , Wang Hao , Zhang Yin , Yuan Lifeng
Published: May 2021

The analysis of the composition of recycled plastics is the prerequisite for identifying the properties of recycled plastics goods-solid waste. This paper systematically studies the composition of crystalline polymers by differential scanning calorimetry, and studies the common blends of polyethylene and polypropylene. The composition of polyamide 6 and polyamide 66 blends, polyethylene and polyamide blends and other common recycled plastics. The standard enthalpy value method and the melting enthalpy area normalization method are compared. The conclusion is that the melting enthalpy area normalization method is more beneficial Determine the composition of recycled plastics. For polyethylene/polypropylene blends, the repeatability of polyethylene and polypropylene should not exceed 5%; for polyamide 6/polyamide 66 blends, the repeatability of polyamide should not exceed 5%. More than 3%; For blends of polyethylene and polyamide, the repeatability of polyethylene and polyamide should not exceed 6%.
An amperometric H2 gas sensor based on ionic liquid for hydrogen fuel cell ships
Authors: Zhan Zhipeng
Published: May 2021

Hydrogen fuel cell ship is an important way to realize green shipping, and the safety of hydrogen fuel ship is primary issue that shall be concerned. H2 gas sensors can provide online monitoring of H2 concentration and it is an effective mean to insure safety of hydrogen fuel. In this study, an amperometric electrochemical H2 gas sensor based on room-temperature ionic liquid was developed, which was expected to be applicable to monitoring of H2 concentration in the hydrogen fuel cell ship. A threeelectrode H2 gas sensor was fabricated by using room-temperature ionic liquid N, N, N-trimethyl-Nbutanesulfonic acid ammonium hydrogen sulfate ([TMBSA][HSO4]) as electrolyte and using platinum black as catalyst. The H2 gas sensor not only had the advantages of the conventional aqueous electrolyte sensor, such as high sensitivity, fast response, and the linear relationship between the response current and the concentration of H2, but also overcame the problem that the conventional electrochemical gas sensor cannot be applied to high humidity environment. After storage in high-humidity environment (98% RH) for three weeks, the sensor had stable performances, with current signal drift less than 2.25%. The sensor has a good potential application prospect in ships with high temperature and humidity environment.
Based on The Gate Bottom Edge Structures Specific Numerical Simulation of Flow Pattern of Gate
Authors: Wu You , Zhao Hua-Dong , Liu Chang
Published: May 2021

The bottom edge structure is a key factor affecting the flow pattern under the gate. The reasonable selection of bottom edge configuration plays an important role in the safe and stable operation of the gate. RNG k-ɛ model is used to simulate the gate water area. Through numerical simulation, the pressure cloud map and pressure data of monitoring points of water area under the gate are fully simulated. Influence of bottom edge structure on flow pattern. The results show that only the flat bottom gate always has negative pressure zone directly below the bottom edge, and the other three structures have no obvious negative pressure zone and move around the downward inclination Angle with time. According to the analysis of the characteristics of upper support and suction, it can be concluded that the upper support force increases with the increase of the front rake angle, and the upper support force of the flat-bottom gate is negative, showing the characteristics of suction.
Analysis and Research on characteristics and corrosion resistance of graphene attached to copper surface
Authors: He Rong-Bu
Published: May 2021

The adhesion of graphene on copper surface was studied, and its chemical characteristics and corrosion resistance were analyzed. The results of polarization curve analysis show that the corrosion resistance of graphene film is the best when the growth time is 7 min. electrochemical impedance spectroscopy shows that the corrosion resistance of copper substrate is improved by 17 times. The graphite strips prepared at 7 min have the best uniformity and continuity. The graphite residue at 4 min is thin but discontinuous. The graphite strips at 10 min have the thickest thickness but the most grain boundary defects. The optimal process parameters were determined as follows: AR / CH4 / H2 flow rate ratio 600 / 40 / 30 SCCM, temperature 1000 ° C, reaction time 7 min.
A one-pot in-situ synthesis of copper cluster doped hydrogen substituted graphdiyne nanofibers (Cu-HsGDY)
Authors: Hao Wenjun , Jin Lei , Fan Rong , Su Xinyu , Chen Zongping
Published: May 2021

Graphdiyne (GDY) is a new type of two-dimensional (2D) carbon materials, in which two benzene rings are chained by diacetylenic linkages (-C≡C-C≡C-). γ-GDY is the most studied GDY due to its stable configuration and was experimentally obtained in 2010 through cross coupling reaction by using hexaethynylbenzene as precursor. Hydrogen substituted graphdiyne (HsGDY) was obtained using 1, 3, 5-triethynylbenzene as precursor in a similar process. Hereinto, a copper cluster doped hydrogen substituted graphdiyne nanofibers (Cu-HsGDY) were prepared through a facile one-pot in-situ synthetic approach in a good reproductive manner. Through simply removing the copper foil, the obtained robust Cu-HsGDY can be transferred onto arbitrary substrates, especially flexible substrates, such as polyethylene terephthalate (PET), which can be used as flexible electronics as future materials.
Scrutiny of the mechanism of β-amyloid protein captures HSV-2 to protect the brain infection
Authors: Zhang Qiuxian , Wang Hecheng
Published: May 2021

Alzheimer’s disease (AD) is an age-related neurodegenerative disorder. β-amyloid protein (Aβ) is the key protein which involved in AD. But the physiological function of Aβ is needed to be investigated. Many experimental studies have shown that Aβ could bind to glycoproteins D (gD) on the surface of the herpes virus. However the mechanism is still unclear. In the present study, we elucidate the molecular mechanism of the interaction between Aβ and gD of herpes simplex virus type 2 (HSV-2) by molecular docking and molecular dynamics simulation. Molecular dynamics simulations displayed that Aβ could stably bind to the HSV-2 gD owing to the presence of several interactions. Analysis binding free energy by molecular mechanics Poisson–Boltzmann surface area (MM–PBSA) method revealed that hot residues including Glu3, Glu11, Glu22 and Ala42 of Aβ1-42 were involved in binding with HSV-2 gD. Thus, the HSV-2 gD can be entrapped by Aβ which will be utilized for prevent and therapy of AD in future.
Analysis on the Mechanical Performance of the Joints of the Wheel-coupler type formwork Support
Authors: Jia Shilong , Zhou Fang , Chen Zhongliang
Published: May 2021

In order to study the mechanical properties of the joints, ANSYS software was used to simulate and analyse the failure form, ultimate bearing capacity, load-displacement curve and the rotational stiffness of the wheel-coupler joint node under force. Results: The wheel-coupler joint node has obvious non-linear characteristics when subjected to force; The bilateral symmetric tension and compression state could better reflect the failure form and deformation of the joint; The rotational stiffness of the wheel-coupler joint node under tension and bending was greater than that under bending and torsion, and was greater than that under tension, bending and torsion.
Resistance Performance Forecast of Trimaran Based on Multiple Regression Analysis
Authors: Xu Xiao Ying , Meng Chao Ying , Wang Kuan
Published: May 2021

Based on the multiple linear regression of the relevant data of 29 ships in the basic database, including cargo ship, oil ship, container ship and chemical ship, etc, the empirical estimation formula of resistance coefficient of single ship under different Fr was obtained. The feasibility of applying the above regression formula to the prediction of the resistance performance of the trimaran based on DTMB5415 is verified by comparison with CFD simulation data. This method has a strong engineering applicability and provides a new idea for the study of computer-aided layout optimization of the trimaran.
Research on Application Effect of Mixconverter in Cement Concrete Pavement
Authors: Wang Tao , Liu Tao , Liang Xiayi , Wei Hanxin , Zheng Zhigang , He Yunwu , Xiao Xin
Published: May 2021

In order to improve the strength of cement concrete pavement and reduce pavement cracking, the application effect of the hydration reaction enhancer Mixconverter in cement concrete pavement was studied by testing the compressive strength, bending strength, crack resistance and chloride ion permeability of concrete indoors. The test results show that the addition of Mixconverter to concrete can significantly improve the compressive and flexural strength of concrete, effectively prevent the expansion of plastic shrinkage and cracking of concrete, and significantly reduce the chloride ion diffusion coefficient. Finally, the test road pavement further proves the improvement effect of Mixconverter on concrete strength and cracking.
Analysis of thermal-force coupling stress field under the temperature of alternating of molecular sieve adsorption tower
Authors: Wang Chuanping , Feng Xuezhang , Yang Xiaoli , He Sha , Li Yingjie , Zhang Jia
Published: May 2021

The thermal stress of molecular sieve adsorption tower under transient temperature of 40-290°C is the basis for ensuring the safe operation of the adsorption tower. In this paper, based on the transient thermodynamics theory, the finite element model of the full-size adsorption tower is established. The distribution of thermal stress at the key positions of the tower body is analyzed, and the strength of the maximum equivalent stress position is evaluated. The results show that the maximum residual stress is at the corner of the inner wall of the tower opening to take over the import and export, the maximum is 313.34MPa, and the effect force is gradually diffused along the takeover; The thermal stress on the inside and outside of the skirt is greater than the thermal stress on the inside and outside of the head. The corresponding stress linearization results of each assessment path were evaluated and passed. The strength design, life prediction and maintenance of adsorption tower in complex temperature cross-change conditions provide theoretical basis.
Synthesis and absorption properties of small-molecule acceptor based rich-electronic benzodiselenophene core with hybrid bromination and fluorination end-group
Authors: Wang Lai , Wang Jin-Liang
Published: May 2021

At present, dihalogenated 1, 1-dicyanomethylene-3-indanone (IC) have attracted widely attention as terminal unit. Here, our work designed and synthesized a new nonfullerene small molecule acceptor material BDSe-FBr, with simultaneously fluorinated and brominated terminal. Due to that bromine atom has more electrons and larger size, and fluorine atom enhanced intermolecular π-π packing, BDSe-FBr present strong absorption abilities in solution and film. It shows a broad absorption range of 600–800 nm and 700– 900 nm, with the maximum absorption peak in solution and film of 742 nm and 774 nm, respectively, and the optical band gap of BDSe-FBr is 1.40 eV. The results are beneficial for high JSC and less energy loss and these strong absorption abilities are due to that bromine atom has more electrons and larger size, and fluorine atom enhanced intermolecular π-π packing. The multiple interactions between heteroatom also is beneficial to improve charge transportation and crystallinity. This new A-D-A type small molecules with simultaneously fluorinated and brominated end-group provide an effective strategy to improve photovoltaic performance of acceptor. The introduction of fluorine and bromine atoms simultaneously into the terminal group exhibits great prospects for application in high performance OSCs.
Exploration and application of directional long boreholes in coal measure strata
Authors: Ke Qin , Dong Peng , Huijun Duan
Published: May 2021

two roadways in adjacent working face of Baode Mine may have the risk of water inrush at the same time, so it is necessary to construct long borehole to cover the roadway excavation. On the basis of the hydrogeological conditions of the mine, the safe water insulation thickness and water inrush coefficient of coal seam No .8 are calculated. The results show that the water inrush coefficient is 0.035-0.037 MPa/m, which is less than the critical value 0.06 MPa/m and the bottom plate has no sudden water hazard. In the construction of No .10 coal seam, the directional long borehole is used to detect whether there is a hidden structure communicating with the floor limestone and to drain water. The test shows that there is no effluent phenomenon in the borehole, which proves that there is no hidden structure in No .10 coal seam.
Analysis on the value of alternative restoration of ecological environmental damage in a company’s greening scheme
Authors: Wang Lin , Liu Jing , Wang Desheng , Wang Shiyu , Jiang Yan , Wang Milan , Liu Zhiguo
Published: May 2021

In this paper, a company greening plan to evaluate ecological service function and value analysis, to determine whether a company greening scheme to the excess emissions of alternative to repair the enterprise ecological environmental damage caused by the results show that a company in September 2019 ~ 2020 at the end of greening measures total carbon release oxygen value of 605000 yuan, including carbon value of 278900 yuan, releasing oxygen value of 326100 yuan. The total value of the greening measures taken by the enterprise from September 2019 to the end of 2020 is 16, 300 yuan, of which the value of providing negative ions is 12, 300 yuan, and the value of absorbing pollutants and catching dust is 4, 000 yuan. The ecological service function of the greening scheme can partially offset the ecological environmental damage caused by the excessive emission of enterprises.
Effects of influent concentration and different valence cations on solute preferential transport in inter-tidal zone of Yellow River Estuary
Authors: Guo Jiameng , Wang Lei , Wu Dan
Published: May 2021

The migration of land-based pollutants in tidal flat sediments has an important impact on the marine ecological environment. The effects of three influent concentrations and two cation valence states on the preferential transport of NO3-N in the sediments of the Yellow River Estuary were studied by soil column experiments. Results showed that the preferential flow and solute transport were more obvious with the increase of influent concentration; The solute potential was increased in the process of solute transport, which led to the rapid flow, shortened the total time, and facilitated the solute transport speed in the soil; The cation in the sediment of the Yellow River Estuary has little effect on the transport of nitrate nitrogen, and the initial penetration time of the penetration curve using Ca (NO3)2 as tracer was a little later than that using KNO3 as tracer, but it is not obvious.
Research on deformation of submarine slope in Zhoushan Islands by in-situ observation
Authors: Liang Tianyang , Xue Liang , Hou Yankai , Zhang Hong , Shan Hongxian
Published: May 2021

Instability of submarine slopes in Zhoushan Islands is widespread. Frequent submarine landslides pose a great threat to offshore facilities such as submarine optical cables, reclamation projects, ports and docks. In this paper, a self-developed in-situ observation system is used to observe the deformation of submarine slopes on the southwest side of Zhujiajian Island in Zhoushan Islands for 75 days. The results show that the deformation characteristics of sediments at different depths of the submarine slope are different, and the lateral deformation of bottom sediments is about 0.75 mm, which is three times as much as the deformation of overlying sediments. The deformation process presents a step-like change, and the deformation direction is consistent with the trend of submarine slope.
Needs To Be in Port Accident Emergency System Construction and Assessment Technology Research
Authors: Zhang Shijie , Zhan Shuifen , Wang Yukun
Published: May 2021

In this paper, the urgency and necessity of the research on the construction and evaluation technology of China’s port accident emergency response system are fully expounded and demonstrated from the level of the policies and documents of the administrative departments, the research level of experts and scholars, and the actual situation of the port industry emergency response work. Based on sorting out the problems existing in the construction and evaluation of China’s port accident emergency response system, the research ideas and main contents of the research on the construction and evaluation technology of port accident emergency response system are put forward.
Diffusion model simulation of odor pollutants in livestock and poultry farms based on environmental monitoring of the Internet of Things
Authors: Zhang Jing , Xing Liwei , Cheng Guodong , Wang Yonghan , Han Shuqing
Published: May 2021

Livestock pollution is one of the main sources of agricultural pollution, which has a negative impact on the global environment. Monitoring, simulation and early warning of major pollutants emitted from livestock production is of great significance for reducing agricultural pollution. Especially, real-time comprehensive monitoring and early warning of the concentration and distribution of harmful gases could improve the harm of livestock production to people, livestock itself and the environment, and increase the safety level of livestock production. This study focused on the perception and monitoring of the discharge status of livestock farming simulation technics, mainly to carry out Internet of Things-based monitoring of the main components of livestock culture pollutants, and to use odor gas air dispersion software “ModOdor” to simulate the spread of pollutants. This study was aimed to determine the characteristics of pollutant diffusion in typical farms, which could provide decision reference to odor hygienic buffer zone and minimum shelter distance to achieve the ecological and safety objectives of livestock farming.
Study on Optimal Loading of Zero Load Cargo
Authors: Chen Tingpeng , Fan Huiwen , Zhang Xingzhen , Li Zhenhui , Hu Shibo
Published: May 2021

In recent years, thanks to the transformation and upgrading of domestic consumption and the continuous improvement of logistics network, the total freight volume of China’s part-load logistics market is also increasing, among which urban logistics network plays an important role in part-load logistics enterprises. Reasonable and perfect urban network is helpful to reduce the total cost of market logistics and improve distribution efficiency. This paper introduces the problems existing in part-load logistics, studies the urban logistics model of part-load logistics enterprises, introduces three ways of part-load transportation, and analyzes the urban logistics model of part-load logistics enterprises. At the end of this paper, the above contents are briefly summarized.
Study on fire risk assessment of offshore platforms
Authors: Chen Tao , Wang Lin
Published: May 2021

As a modern infrastructure for offshore oil and gas resources development, offshore platforms have many advantages, such as high efficiency, concentration, flexibility, and repeatability. At the same time, its upper module environment is bad, the equipment is numerous, has the very big risk. In case of fire and explosion and other accidents, it is difficult to get timely rescue. Therefore, fire risk assessment for offshore platform is very necessary. This paper focuses on the research results in the field of fire risk assessment of offshore platforms at home and abroad, points out the shortcomings of current research, and provides reference for risk reduction and effective prevention of offshore platform operations.
Construction of Landscape Poetry Road under the Background of Transportation and Travel Integration
Authors: Senyan Huang , Rongrong Qiang , Dan Wang
Published: May 2021

Under the background of the integration of transport industry and tourism industry, the highway can expand many functions such as ecology, tourism, scenic view, nostalgia and so on. By this, it replaces the traditional single road traffic function, organically combine the appreciation of natural landscape, ecological environment protection and the pursuit of human history, and closely connects the highway with the tourist area. Relying on the typical projects and the regional characteristics of rich tourism resources, this paper deeply digs the regional natural ecological elements of the “Home of Mountains and Rivers” and the regional cultural characteristics of “Millennium Poetry Road”, and connects the pearls on the golden tourism line. This paper aims to study construction of the fine road of tourism traffic in mountains, rivers and poetry road under the background of the integration of traffic and tourism, and provides practical exploration and reference for the integrated development of highway and tourism.
Structure Optimization of UHV RIP Oil-SF6 bushings Based on Improved Equal Margin Design Method and Back-Propagation Neural Network
Authors: Shiling Zhang
Published: May 2021

Equal margin design method based on the classic analytic formula is widely used in development of extra-high voltage bushing products, and its effectiveness and practicality have been fully validated. However, model and temperature factors have significant impact on internal E-field distribution of UHVAC and UHVDC bushing condenser, which traditional analytic formula is difficult to evaluate quantitatively, so it’s necessary to improve traditional equal margin design method. Firstly, basic principles of equal margin design method and its software package were briefly described, and the laws of model and temperature factors influencing on condenser E-field were investigated on FEM (finite element method) computing platform. Based on these, mathematical model of improved equal margin design method for bushing condenser was established, and flow chart of optimization process combining FEM electro-thermal coupling calculation with genetic algorithm was presented. The improved method was applied to design of UHV RIP oil-gas prototype to realize uniform axial E-field distribution along bushing condenser and equal partial discharge margin between adjacent foils. Bushing condenser was fabricated according to above optimized design structure, and has passed all type tests. In the paper, the FEM electro-thermal coupling calculation method was applied to the inner insulation optimization design to make bushing condenser’s design more suitable. The paper can provide some theoretical guidelines for research and development of other bushings in UHV level.
A study on China’s Agricultural Products Exports to Kazakhstan Based on CMS Model
Authors: Sun Huiqing , Zhong Qingrou
Published: May 2021

This article applies the modified CMS model and selects the data about exports of China’s agricultural products to Kazakhstan from 1998 to 2019 according to SITC (Rev.3) so as to make an empirical analysis of the factors influencing the growth of China’s agricultural products exports to Kazakhstan based on both the overall and classification perspectives. The results show that the structural change effects promoted the growth of China’s agricultural products exports to Kazakhstan before the “Belt and Road” initiative was proposed, followed by the inhibiting effect. The competitiveness effect is inhibitory, and then it is promoting. The interaction effects before and after the “Belt and Road” initiative was proposed are both inhibitory.
Detection of tower bolt looseness and its influence of wind level
Authors: Wu Enjun , Chen Hongjun , Liao Weida , Qu Wenfeng , Huo Chong , Liang Zhengzhao , Huang Xiangzhao , Li Zhenrong , Li Hang , He Bin , Yang Tao
Published: May 2021

Taking the wind turbine tower as the research object, based on the finite element software, a simplified beam-shell hybrid element model was first established; through the simulation, the phase difference between the loose position and the unloose position was compared to verify the feasibility of the phase difference detection method; Secondly, the influence of the number of loose bolts, the position of loosening, and the magnitude of the wind force on the phase of the flange bolt connection structure and the response characteristics of the system are analyzed. The research results show that the number of loose bolts, the position of loosening, and the magnitude of the wind have certain effects on the phase difference and response characteristics of the flange. With the increase in the number of loose bolts, the connection stiffness of the bolt connection continues to decrease. The linear characteristic is enhanced; the closer the loosening is to the excitation force loading position, the greater the detected phase difference; as the wind increases, the phase of the upper flange of the tower changes, and the phase of the lower flange remains unchanged, and the wind is on the flange The disc connection strength has little effect.
Study on the Control Indexes of Construction Land in Shandong Province from the Perspective of Intensive Use
Authors: Wang Hong , Cui Dongxu
Published: May 2021

Based on the revision of “Construction Land Control Standard of Shandong Province (2019)”, this paper studied on the indexes of construction land of all kinds by improving the system of control standards, innovating the methods of studying the index, optimizing the content controlled by the index, etc., following the principle of land conservation and its intensive use. It is hoped that it can provide some reference for the establishment of a strict system of land conservation and its intensive use, effective implementation of land supply policies and industrial policies, and improvement of land use efficiency and resource protection capacity.
The Dilemma and Application Construction of Integrated Management of Marine Ecological Environment
Authors: Lv Dandan
Published: May 2021

Starting from the background of the continuous improvement of the quality of sustainable economic development, this paper analyzes and studies the governance concepts and governance methods in the governance of China’s marine ecological environment. In order to continuously meet higher standards and requirements in the management of the marine ecological environment, we must pay more attention to the process of ecological problem solving mechanisms, and to coordinate excessive decentralization and comprehensive management. This article first briefly describes the importance of improving the effect of marine ecological environment governance, and at the same time analyzes the problems existing in the current stage of China’s marine ecological environment governance restructuring and information sharing work. The author explored strategies to further improve the efficiency and quality of the overall framework of China’s marine ecological environment governance.
Deep High-moisture Soil pH Test Equipment and Method
Authors: Chen Dongxu , Liu Hua , Cai Erjian , Wu Hui
Published: May 2021

Excessive use of chemical fertilizers in the soil will cause excessive residues of heavy metals, soil hardening and high soil alkalinity. A soil pH tester is generally used to test the soil pH scale to ensure the normal growth of crops. However, the tester cannot be used directly in the case of soil hardening and the soil should be moistened before measurement. In addition, existing soil pH testers can only perform single-point tests, and multiple tests are generally required in order to obtain accurate experimental data. Common deep soil pH test devices are difficult to use and have the problem of inaccurate measurement results due to excessive impurities in the soil in the process of use, resulting in errors in soil analysis which require secondary revision to improve the soil environment. To make up for the defects of existing technologies, this study designs a deep high-moisture soil pH tester, which has the advantage of high soil impurity filtering performance and addresses the problem of inaccurate measurement results due to excessive impurities in the soil.