bluuebunny/crossref_metadata_2025 huggingface dataset:
Prospects for the cultivation of Australian red claw crayfish Cherax quadricarinatus on warm waters of energy facilities
Authors: Kalayda M L , Sadykova L N
Published: July 2019

River crayfish - a delicious food product. On the caloric content (72kcal/100g), the content of fats (2.83%), protein (17.13%) and vitamins of group B (thiamine, riboflavin, etc.), crayfish are not inferior to freshwater fish, and by a number of parameters exceed them. Meat of crayfish is rich in sulfur, phosphorus, iron, cobalt, magnesium, fluorine, potassium, selenium, chromium, calcium and vitamins of group B (B12, B6, B2, B1, B9,), C, E, K, PP and D. There is practically no cholesterol in it, but there are a lot of organic acids. A promising target of cultivation, both in Russia and abroad, is currently the Australian red-cheeked crayfish Cherax quadricarinatus. It is cultivated in such countries as: China, Brazil, Ecuador, America, and others. Currently, in spite of the presence of active crayfish farms in Russia, the biotechnology of growing Cherax quadricarinatus is not sufficiently developed. The main advantages of Cherax quadricarinatus over crayfish that live in our region (Astacus leptodactylus, Astacus astacus, etc.) are: high growth rate, tolerance to water quality, lack of pelagic larva stage. It is advisable to use cooler reservoirs of energy objects for growing valuable warm water aquaculture objects, since the water temperature of these reservoirs is higher than the natural. Energy can contribute to the development of warm water crayfish farming both in the Republic of Tatarstan and in Russia as a whole. Due to the excessive heat that enters the natural reservoirs from energy facilities, an excellent opportunity appears in the absence of the cost of expensive equipment, to grow valuable products. According to expert estimates, the cultivation of crayfish is 5-6 times more profitable than fish.
Sustainable water use of the Kuibyshev reservoir as an hydropower facility
Authors: Minakova E A , Shlichkov A P , Latipova V Z
Published: July 2019

Sustainable water use in a broad sense is a combination of all forms and uses of water resources that directly and indirectly affect the formation of the water fund. When operating hydropower facilities, it is necessary to comply with the requirements for the rational use and protection of water bodies. The article presents the results of the assessment of the specificity of water consumption and water disposal in the Kuibyshev reservoir within the Republic of Tajikistan, as well as the calculation and assessment of the main trends in water reservoir quality dynamics. Calculation of the index of the combinatory water pollution index during the period 2009-2017 yrs allowed to reveal a moderate tendency of its decrease within the limits of the 4th class of quality from the upper reaches to the dam of the Kuibyshev reservoir.
Development strategy of the energy supply system for MPEI campus blocks based on green building
Authors: Sultanguzin I. A. , Zhigulina E.V. , Yavorovsky Y.V. , Kalyakin I.D. , Govorin A.V. , Fedyukhin A.V. , Krolin A.A. , Guzhov S. V. , Derevianko O. , Mukhametova L.
Published: July 2019

The article presents the development strategy of the energy supply system for National Research University “Moscow Power Engineering Institute” (MPEI) buildings based on green building. The designing mathematical model of one of MPEI academic buildings connected with the Scientific and technical library of the University has been created in Passive House Planning Package and designPH software. The parameters of the building energy supply system with the lowest energy consumption are presented.
Development of the forest waste gasification system with electricity production
Authors: Aiyzan A , Fedukhin A , Strogonov K , Derevianko O. , Makoev S. , Egorov M.
Published: July 2019

The aim of this work is development of a technological scheme of gasification of biomass to generate electricity, as well as development of efficient circulating fluidized bed gasifier with heat exchanger. The paper deals with the existing technology of biomass gasification and the influence of thermal parameters on the composition of gasification products.
Computer simulator-analytical complexes of thermal power stations for the training with higher education students
Authors: Chichirova N.D. , Abasev Yu.V. , Shagiev N.G.
Published: July 2019

The possibilities of using computer simulator-analytical complexes for training and retraining of large thermal power plants personnel are analyzed. Long-term experience of simulators using at the Thermal Power Stations Department (TPP) of Kazan State Power Engineering University (KSPU) is generalized. The requirements for computer simulators for the higher educational process are grounded.
Neural network modeling of surface heat transfer intensifiers in the form of segment recesses
Authors: Gilfanov K Kh , Shakirov R A
Published: July 2019

The results of neural network modeling of surface heat transfer intensifiers in the form of spherical recesses are presented, based on experimental data. The possibility and prospects of building artificial neural networks for modeling the characteristics of heat exchange surfaces are shown.
Research of natural biomass conversion in the Republic of Burundi
Authors: Manigomba J.A. , Chichirova N. D. , Gruzdev V.B.
Published: July 2019

The paper investigates the solution of an urgent energy problem in Republic of Burundi. The pyrolysis process using a recycling of peat, wood waste, agricultural biomass, domestic and industrial waste with the objective of obtaining a secondary energy resources is proposed. Based on this method a pyrolysis gas with a ratio of CO and H2 varied from 1:1 to 1:3 is obtained. The main variable factors determining this composition are the temperature. With the increase of temperature, the pyrolysis gas increases. The number of experiments with fixed factors was chosen at least eight. The experimental setup was used to study the pyrolysis gas of dry sawdust and peat in the temperature range from 450 to 1150°C.
Cascade bowl-type heat and mass exchange packing with dripping irrigation mode
Authors: Merentsov N.A. , Lebedev V.N. , Persidskiy A.V. , Balashov V.A.
Published: July 2019

Data of experimental study of hydrodynamics, heat and mass transfer of cascade bowl-type heat and mass exchange packing with dripping spray mode and some comparative characteristics of the packed device with packing, which have wide industrial application, are given in the article.
Modeling of pyrolysis process of high-moisture coals
Authors: Pyatygina M. V. , Galkeeva A. A. , Mingaleeva G. R.
Published: July 2019

The research is aimed at solving the fundamental scientific task of creating scientific fundamentals, deep processing of hydrocarbon raw materials (preliminary gasification, conversion, pyrolysis of solid minerals and renewable combustible resources) to produce liquid and gaseous fuels and a total increase in efficiency.
Modeling the process of convective mass transfer in a tubular electrochemical reactor
Authors: Sitnikov S Y , Plotnikova L V , Dresvyannikov A F , Kiselev N S , Mironov S P
Published: July 2019

The model, describing a processes of convective masstransfering in a tubular electrolytic cell with the much distinguishing sizes of electrodes is proposed suitable for practical calculations.

The electrochemical reactor permitting to clearing of water with the help of chemical reactions in bulk of a solution at participation of electrogenerated reagent is created.
Regional management of district heating
Authors: Sovetova N , Sinitsyn A , Tritenko E , Derevianko O , Mukhametova L , Fedukhin A , Makoev S , Kalyutik A
Published: July 2019

Nowadays in Russia we see rapid modernization of power engineering and transport systems. Under these conditions the issue concerning improvement of regional heat supply system energy-efficiency has gained a new importance. The aim of this study is to find new development directions of the public-private partnership (PPP), specifically from the perspective of its energy efficiency. Amid the financial crisis and economic sanctions the formation of public-private partnership allows increasing of energy efficiency of regional fuel and energy complex by means of regional energy service company creation. This paper will be useful both for central and local government and for private business.
Mathematical simulation of the thermal processes in the heating networks insulation using thin-film covering
Authors: Zakirova I.A. , Chichirova N.D.
Published: July 2019

Annotation

The necessity of application of computer technologies in the educational process with increasing requirements to the higher technical education quality is shown. The possibility of the program complex using of finite element modeling in the learning process, in the numerical study of the convection effect on heat exchange in the porous insulation of heat network pipelines using thin-film coatings, is considered.
Analysis of thermodynamic efficiency of the fuel preparation systems with an intermediate hopper at thermal power plants
Authors: Zatsarinnaya J N , Logacheva A G , Solovyova A A
Published: July 2019

Annotation

The thermal and thermodynamic calculation of closed and open loop individual systems of coal preparation at TPP with different types of mills reveals the possibilities of increasing the efficiency of the technological scheme by utilizing the heat removed from the system and thus increasing the thermodynamic efficiency.
Effects of exogenous melatonin and abscisic acid on the antioxidant enzyme activities and photosynthetic pigment in ‘Summer Black’ grape under drought stress
Authors: Lin Zhiyi , Wang Yunmei , Xia Hui , Liang Dong
Published: July 2019

In this study, ‘Summer Black’ grape seedlings were used as the experimental materials, to be applied with 100μmol/L melatonin (MT) and 50μmol/L abscisic acid (ABA) solutions to investigate the effects on antioxidant enzyme activities and photosynthetic pigment under drought stress. The results showed that the increase of chlorophyll content in grape leaves due to drought was reduced by the function of MT and ABA, while the content of carotenoid showed the opposite trend. The antioxidant capacity was measured with SOD, POD and CAT, and showed that MT, ABA treatment significantly increased the activity of SOD, but reduced activity of POD and CAT in the leaves. ABA had the greater effect, but MT seems impaired the influence of ABA. The results provided a theoretical basis for improving the yield and quality of grape.
Research on the Technology of Anti-Erosion and Vegetation Promotion for Pisha Sandstone Region in the Middle Yellow River Basin
Authors: Peiqing Xiao , Wuyu Wei , pan Zhang , Chunxia Yang
Published: July 2019

Pisha sandstone region is the most vulnerable and the most dramatic area of soil erosion, and it is also the concentrated source area of the coarse sediment of the Yellow River. It is of great significance to research the anti-erosion and vegetation promotion technology in the Pisha sandstone region. Based on the review of previous research results on soil erosion control technology in Pisha sandstone area, this paper mainly introduces the anti-erosion and vegetation promotion technology in recent years, including the anti-erosion and vegetation promotion material suitable for Pisha sandstone area in the middle Yellow River Basin, the modified dam-building material of Pisha sandstone, and the stereoscopic configuration mode of binary stereoscopic anti-erosion and vegetation promotion measures in Pisha sandstone area. Field monitoring experiments showed that the runoff and sediment yield of the experimental plot were reduced by more than 70% and 91% respectively, which can provide technical support for the harnessing and development of serious soil and water loss areas of Pisha sandstone and the harnessing and development of the Yellow River.
Effects of forest on seasonal runoff in North China
Authors: Lv Xizhi , Zuo Zhongguo , Sun Juan , Ni Yongxin , Ma Li , Zhang Yang
Published: July 2019

The relationship of forest-water is a hot and important issue in ecohydrology studies. The relations between forest and water had been widely investigated, whereas information on the impact of forest on seasonal runoff is still lacking. In this study, the statistical and graphic analyses based on the long-term hydrological data of the 20 watersheds in the rocky mountain area of North China were made to analyse the impact trend of forest on seasonal runoff. The results showed that the low flow coefficient decreases by 3.3 % with a 10 % enhancement of the forest coverage. However, the effects of forest on high flow are much more complex and no obvious changing trends can be observed. With increasing forest coverage (f), the high flow show a trend of “increasing (f<20 %)—stable (f is 20-60 %)—decreasing (f>60 %)”, and there has the largest high flow when f is 20%∼60%, the largest high flow coefficient is about 30%.
Enhanced removal efficiency and influencing factors of nitrobenzene in soil by foam flushing
Authors: Yan Su , Wei-guo Cheng , Ya-bin Li , xin Wang , Jian Wang
Published: July 2019

Laboratory scale experiments were conducted to investigate the removal efficiency of nitrobenzene in soil by different kinds of flushing liquid. In addition, the influencing factors, such as foam injection rate, foam quality and permeability of medium for the removal efficiency of nitrobenzene in soil were discussed in the paper. The results showed that the residual rates of nitrobenzene in soil were 62.15%, 63.18%, and 2.65%, while the flushing liquid were water, SDS solution, and SDS foam, respectively. The removal efficiency of nitrobenzene was found to be greatly increased by using a foam-enhanced surfactant solution flooding approach, probably because of the reduction in the channeling flow effect. These data demonstrated that by the use of foam, the nitrobenzene recovery efficiency can be significantly improved. Within the scope of the study, the foam quality and foam injection rate has little effect on the total removal efficiency of nitrobenzene in soil. Moreover, the total removal efficiency of nitrobenzene for low permeability (0.1∼0.25mm, 0.25∼0.5mm) is greater than that in high permeability medium. Because of the time necessary for distribution of foam through the soil and desorption process is much longer for soil with a low hydraulic conductivity, this technique is more effective in soil with lower hydraulic conductivity and higher porosity.
Review on catalytic oxidation degradation of oil-contaminated soil by Fenton-like reagent
Authors: Chen Jinmin , Hu Zhengfeng , Zhu Mingqiao
Published: July 2019

Petroleum-contaminated soil, whose soil availability is in rapid decrease and which also does great damage to other living things, is greatly different from the natural soil. Therefore, it is necessary and urgent to restore the oil-contaminated soil. In this paper, the current status of catalytic degradation of oil-contaminated soil using Fenton’s reagent is reviewed, including mechanism of traditional Fenton’s reagent, Fenton-like catalyst, photo-Fenton catalysis, and other modification.
Constructing the Evaluation System of Urban Land Ecosystem Based on Entropy Method and Analytic Hierarchy Process—Taking Shaanxi Province as an Example
Authors: Wei Fang , Lintao Lou
Published: July 2019

The article establishes the ecosystem evaluation system of saline-alkali land in Shaanxi Province by using soil index, environmental index, biological index, productivity index and sustainable development index, and uses entropy method and analytic hierarchy process to determine the weight of index evaluation system. Finally, the practice and evaluation of the saline-alkali land ecological management method in Shaanxi Province was carried out, and it was found that the establishment of the index system has theoretical and practical significance.
Marvellous “1” : A Spatio-temporal Model of Ecological Environment
Authors: Huang Zhilin , Jiang Shanshan , Wang Xin , Zhang Yujie
Published: July 2019

Traditionally, most land-use projects do not take the impact of ecological degradation into account.The negative economic costs of land use change are substantial.To tackle these problems,in this paper,we established a spatio-temporal ecological environment model.

First, we select the method of Principal Component Analysis(PCA) to screen out the tertiary time-related indicators which affect ecological environment, then adopt Weighted Average Algorithm (WAA) to calculate the weights of the secondary indicators.Meanwhile, make each feature quantity at the same level and get their weighted sum.When the exploitation of ecological resources is balanced with its carrying capacity, the weighted sum is tend to 1.

Then we find the spatial variable,and introduce the ratio of supply and demand,which named supply-demand coefficient, and make up an equation with the weighted sum mentioned above.When the supply and demand of a region are balanced, the supply-demand coefficient mentioned above is equal to the weighted sum,which is also 1. When the supply is greater than the demand, both sides of the equation are greater than 1,at this time, excessive supply causes unnecessary economic costs.

Finally, we use the Genetic Algorithm(GA)to evaluate the supply-demand coefficient, so as to adjust the environmental degradation caused by land development projects in time.
Numerical Simulation of Heat Transfer Performance of Micro-heat Pipe Array based on FLUENT
Authors: Yang Jingang , Yu Tianmiao , Wei Sinan , Wang Xinpeng
Published: July 2019

The structure and basic principle of heat pipe and plate micro heat pipe array are introduced in detail, and the application of FLUENT grid technology and numerical technique is introduced. The thermal conductivity, the phase change and the effect of the liquid filling rate on the heat transfer performance of the heat pipe were simulated by using FLUENT of CFD software. The results show that when the liquid filling rate is 20% ∼ 30%, the thermal conductivity of the micro heat pipe starts to rise, reaching 6.11 × 10-5 W · m-2 at the highest level. When the liquid filling rate of 30% to 40%, the thermal conductivity of the micro-heat pipe began to decline, which indicates that the best filling rate is when the liquid filling rate is 20 ∼ 30. When the temperature of the outer wall of the condensation section is 67.5 °C, the maximum heat flux can reach 8.1 × 105 W · m-2.
Solid waste characteristic identification method of imported epoxy resin
Authors: Luo Chuan , Yuan Lifeng , Xu Shanhao , Zhang Yin , Chen TieShan , Chen Yao
Published: July 2019

Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimeter (DSC) and various analytical methods were used to analyze the main components, glass transition temperature (Tg), volatile matter content and ash content of a batch of imported recycled epoxy resin. According to the appearance characteristics and the production process of the sample, the source of the sample was analyzed, Solid waste properties were determined according to the relevant provisions of GB 34330-2017 “Identification standards for solid wastes General rules”. The results show that the samples belong to epoxy resin scap and trim mix manufactured by different production processes for different production purposes, which fall in the category of solid wastes banned by China for import. This identification method provides a reference for the identification and supervision of solid waste derived from imported recycled plastics.
Efficiency Evaluation of Industrial Solid Waste Recycling Utilization Based on Improved DEA Model
Authors: Zhou Jun , Zhang Rong
Published: July 2019

As an industrial power, China has become increasingly problematic in terms of resource consumption and serious environmental pollution. Encouraging the utilization of industrial solid waste resources is a necessary way to achieve economic and environmental sustainability. Based on the new improved DEA model, this paper studies the utilization efficiency and influencing factors of industrial solid waste resource utilization in 31 regions of China in 2017. The research results show that the average efficiency of China’s industrial solid waste resource utilization is at a relatively high level, which is significantly higher than that in 2010; the investment amount of industrial waste treatment in most areas is rationally utilized; nearly half of the areas have excessive storage of industrial solid waste; there is little difference in scale efficiency between the remaining 30 regions except Tibet, but there is a significant difference in pure technical efficiency. Finally, this paper proposes suggestions for improvement from the perspective of coordinating economic, social and environmental sustainability.
Research on Sustainability of Supply Chain Financial Model in Fujian Free Trade Zone
Authors: Wei Liu , qianqian Song
Published: July 2019

Supply chain finance combines logistics, information flow and capital flow, which can effectively solve the shortage of funds and reduce the cost of the entire supply chain. Based on the development background of Fujian province’s free trade zone and supply chain finance, this paper analyzes the current situation of SME financing in China and Fujian province, and focuses on the insufficient industrial chain of supply chain finance in Fujian Free Trade Zone. Supply chain financial intermediaries are unbalanced development, inadequate laws and regulations, and relatively weak technology. The paper proposes a comprehensive model of supply chain financing based on free trade zone, carries out QFLP financing for the real economy, develops supply chain financial services for shipping centers, and encourages intermediaries to develop supply chain financial services, improve credit system and legal system, and utilize blockchain technology to improve the informationization degree of supply chain finance and other proposals, promote the rapid development of supply chain finance in Fujian Free Trade Zone, and solve the financing difficulties of SMEs.
Research on New Materials and Sustainable Development—Taking QTKJ as an Example
Authors: Li Cao
Published: July 2019

Sustainable development is a contemporary world issue, and it is of special importance to a big country like China. The coordination between the development of human civilization and economy and the sustainability of the earth’s natural environment as well as the development of energy and resources is the key to the realization of sustainable development. New materials are the foundation and precursor of national economic and social development. The research and development of new materials can not only meet the growing needs of human beings, but also make various materials meet environmental load requirements and their processing, manufacturing and recycling technologies. As the main force of new material research and development, QTKJ company has made important contributions to the national new material field in the development and research of new materials. Through the analysis of QTKJ company, this paper analyzes and evaluates the existing mechanisms, finds the problems, and proposes corresponding countermeasures for the existing problems. Provide a basis for new material enterprises to optimize their human resources strategy and achieve sustainable development.
On the Existence and Critical Size of Two-dimensional Crystal
Authors: Zeng Kangshi , Xu Zhen , Guo Xinpei , Xiong Tianbai
Published: July 2019

The discovery of graphene strongly contradicts Landau’s viewpoint on the existence of two-dimensional (2D) crystals. In this paper, some clarification on this contradiction by simple analyses are made. Besides, the analytical expressions of 2D crystals’ critical size are derived. The result shows that the maximal size of 2D crystals is governed by out-of-plane vibration of atoms in any temperature. This research is valuable in understanding the stability and existence of 2-D crystals.
A novel energy-saving technology for noise reduction of rotary aerators in sewage treatment plants
Authors: Qiang Ning , Shi Tianzhe , Shi Xianbin , Liu Jing , Liu Tao
Published: July 2019

For oxidation ditch wastewater treatment in the sewage treatment plant, a rotary aerator is often used for aeration. Large noise will be generated during the aeration process, which seriously affects the daily life of nearby residents and workers. This article describes how to reduce noise using the positive and negative pressure difference formed by the rotating brush on both sides and the natural ventilation muffling channel that does not require additional electrical energy in order to replace the traditional closed sound insulation which requires adding a blower to meet the aeration and oxygenation demands. In this way, electrical energy can be saved and noise can be reduced.
Research on Optimization of VR Panorama Acoustic Field acquisition Technology
Authors: Huo Yiwen , Xu Wu , Tao Jing , Li Yilin
Published: July 2019

This paper takes the VR protection of the four seasons production tune of the intangible cultural heritage as an example, aiming at the low matching degree between the ordinary audio frequency acquisition and the actual results in the VR technology. On the basis of head position location based on MEMS and head related transfer function (HRTF), further optimization is carried out. The simulation results show that the acquisition of synthetic information of virtual reality based on MEMS and HRTF has a great positive effect on the protection of the four seasons production tune and the advancement of VR technology.
Research Progress of Polyvinyl Alcohol Foam in Biomedicine
Authors: Zhai Weikun , Wang Yuansheng , Wang Xuan , Wu Qiang , Li Ke
Published: July 2019

Polyvinyl alcohol (PVA) foam has strong water absorption and retention, good biocompatibility and economy, and is environmental friendly. It can be applied to different medical clinical fields by adding modifiers to impart excellent performance. This paper reviews the research progress of PVA foam in biomedicine and introduces the application of PVA foam in negative pressure wound therapy, hemostatic material, cell culture material and cartilage substitute material, and military and civilian integration combing with war wound rescue.
Research on New Sprinkler Heat Insulation System Based on 3D Printing Technology
Authors: Zhou Qipei , Liu Xuetao
Published: July 2019

Firstly, the mechanical structure of the sprinkler is designed by Solidworks in this paper. The wire of the sprinkler is made of waste PET. Then the theoretical feasibility is proved by further simulation analysis with ANSYS software, and the thermodynamic theory of heating and heat dissipation is analyzed and utilized. Finally, the practical operation feasibility of the new 3D printer print nozzle insulation system is verified by physical printing test.
A new view on improving the preparation efficiency of shear thickening fluid
Authors: An Chao , Xiang Changlong , Jia Qingxiu , Wang Fadong
Published: July 2019

In this paper, the relationship of rheological properties, particle size and particle size distribution of dispersed phase silica at different blending times during the preparation of STF was studied in detail. It is found that with the increase of blending time, the initial viscosity η0 of STF decreases, the critical shear rate γ
c increases, the maximum thickening viscosity ηm decreases, the thickening ratio decreases and the shear thickening effect of the system shows a weakening trend. On the other, the volume average particle size of silica decreases gradually and finally reaches a stable value. The particle size distribution changed from double-interval distribution to single-interval distribution. The variation of shear thickening properties with blending time was explained by combining Cluster and Jamming theory. It is considered that the preparation of STF can be completed when the suspension is transparent and has a uniform viscosity. It is believed that this will play an important role in improving the efficiency of STF preparation and will be of great help to realize industrialized production of STF in the future.
Quantitative Analysis of Operating Economical Performance by Valve Leakage in Bypass System
Authors: Zhang Dongxing , Zhao Yuzhu , Wu Zhengfeng , Wu Xi
Published: July 2019

In this paper, the influence of steam leakage of the control valve in bypass system on unit operating economy is analysed. Through quantitative analysis, the formulas for calculating the influence of the steam leakage of control valves in high-pressure, medium-pressure and low-pressure bypass systems on the parameters of unit work and heat absorption are obtained. In the end, combined with the design data, the thermal economy of 1000MW double reheat unit is analyzed in view of the internal leakage of control valve in high-pressure, medium-pressure and low-pressure bypass system.
Ground-deformation Form and Control Factors Caused by Irrigation
Authors: Yao Yong , Cai Hualong
Published: July 2019

Since irrigation in1968, ground deformation and geological disasters frequently happened. Based on depth investigation, survey and experimental research, this paper comprehensively analyze the geological environment background of Heifangtai. The distribution and types of ground deformation were systematically categorized. On this basis, this paper analyze control factors of ground deformation. Topography, geological structure, stratigraphy and lithology are the internal factors, while irrigation is the main predisposing factor. The ground deformation is the result of various factors. Study will provide the foundation for geological environment caused by irrigation. This paper has some theoretical and practical significance.
The safety evaluation of management in chemical enterprise with generalized regression neural network
Authors: Yuan Y , Zhou X , Man J , Jiao H , Jiang Q , Xu Q , Kong S , Gao W
Published: July 2019

In order to better evaluate chemical enterprises, artificial neural networks including the back-propagation neural network, radial basis function neural network and generalized regression neural network were used in this paper. The management in chemical enterprise was evaluated. The expert scores and evaluation values are analyzed. The results show that the generalized regression neural network and the radial basis function neural network can better evaluate and predict the safety of chemical enterprises. The prediction of radial basis function neural network is more accurate.
Development and Optimization of Road Power Generation Equipment via Gas Collection
Authors: Zhong Ke , Sun Mingzhi , Sun Shengkai
Published: July 2019

With the development of society, the demand for reliable uninterruptible power sources is increasing. At the same time, with the improvement of people’s life and environment protection, the developing of clean, environmental, reliable and inexpensive new energy sources has become a new research hotspot in the world. Highway infrastructure has good potential to develop renewable energy in addition to the transport function. Based on the energy loss caused by the transformation of kinetic energy into potential energy when the vehicle passes through the deceleration strip, a set of green mechanical power generation equipment is designed by introducing compressed air energy storage technology. The design scheme and working principle of the equipment are described and analyzed, and the prototype of the equipment is manufactured. The power generation efficiency of the equipment is tested by loading test, and the design and operation parameters of the equipment are optimized accordingly. The energy generated by 50000 loading tests is 0.123kw·h, which preliminarily realizes the development and utilization of potential road energy.
The optimal design of fire fighting suits
Authors: Huang Yiping
Published: July 2019

Fire fighting suits are very important for fire rescue workers. However, at present, the design is not optimal. In this paper, we design an optimal fire fighting suits, considering the temperature distribution of a dummy with a constant temperature. Because the dummy has a constant temperature, it cannot simulate human metabolism, which means the design process should be an unsteady heat transfer process with an internal heat source. Hence, we have made a reasonable simplification of the process. According to the principle of heat balance, since the temperature is dynamic, a recursive relation about the temperature is established, and the optimal thickness of layer II is 15mm through simulation. By integrating the recursive formula, the functional expression of temperature with respect to time, layer II thickness and layer IV thickness can be obtained under certain approximation. Since the outside temperature of the dummy is constantly rising, it is only necessary to ask the temperature value of the 25th minute and the 30th minute for each thickness condition to reach the desired temperature limit. Therefore, different thickness values are circulated discretely to establish the optimal function of thickness, and the thickness of layer II is 2mm and that of layer IV is 4mm.
Clogging test on filter fabric of plastic drainage board used in clay
Authors: Zheng Ai-rong , Wang Chuang
Published: July 2019

Vacuum preloading technology combined with plastic drainage board has been applied more and more widely. Because the plastic drainage board is used soft-clay in most cases, it is not recommend to study the clogging of filter fabric by gradient ratio method. Therefore, we have proposed a new experimental method, i.e. axial compression clogging. This method can be used to study the clogging of geotextile in clay. Several groups of filters fabric were carried out by this method, and their performances were compared with those obtained from on-side used plastic drainage board. The results show that soil content per unit area and vertical permeability coefficient are very close to those obtained from on-side used plastic drainage board, and the values of the former are slightly smaller than those of the latter.
Experimental Study on Cracks of CFRP Reinforced Prestressed Concrete Beams
Authors: Liu Yunyan , Fan Yingfang
Published: July 2019

Ten prestressed concrete beams were designed and manufactured, which were preloaded with 40% and 60% ultimate load to crack. Then the beams were reinforced by CFRP and immersed in chloride condition for 120 days. After that, a four-point bending test was performed. Based on the statistics and fractal theories, the cracking mechanism, distribution and shapes of cracks in mid span were researched, considering the initial cracks, CFRP reinforcement and chloride corrosion. The test results demonstrate that CFRP has a restraining effect on the cracks, and the effect decreases with the increases of heights. The crack widths conform to normal distribution, and the dispersion coefficient, average widths and characteristic widths decrease with the increase of the heights, and the three parameters of CFRP reinforced beams at the same heights are all smaller than those of unreinforced beams. The fractal dimensions of cracks in unreinforced beams and CFRP reinforced beams increase linearly and exponentially with load steps, respectively. CFRP reinforcement and Chloride corrosion makes the fractal dimension increase, respectively. The corrosion effect of chloride can be weakened by CFRP. Therefore, the fractal dimensions of beam cracks can be used to evaluate the damage caused by several coupled load conditions.
Research and Enlightenment to China on Identification and Evaluation of Architecture Public Open Space in New York POPS Management and Control System
Authors: Shi Ying , Qin Qirui
Published: July 2019

Architecture public open space is an indispensable part of urban public open space, and its construction is a long-term and sustainable process. Some mainland cities and regions in China began to pay attention to the role of building public open space in urban public space from the 1990s and relevant incentives were formulated when land was sold. However, due to the lack of a targeted and complete control system, especially the lack of identification criteria for architecture public open space, the construction, use and maintenance of architecture public open space are unsatisfactory. Based on the study of New York’s POPS management and control system, this paper summarizes the experience of identification and evaluation of architecture public open space in order to provide inspiration for the establishment of identification and evaluation system of building public open space in China.
Transformation of Rainfall(Aug 6,2018) characteristics in Yinchuan city
Authors: Li Hongying , Shen Zhenzhou , Yu Guoqiang , Yang Qiannan , Jing Xinai , Lin Jing , Ma Zhilin , Li Weiwi
Published: July 2019

The rainfall feature were analyzed at Yinchuan city in this paper, the rainfall feature was detected by LPM laser raindrop spectrometer, including rainfall raindrops speed and raindrops size. The data shows that the rainfall raindrops speed and size of natural raindrops were relatively strongly; In the process of individual rainfall, the rainfall raindrops final speed of the rain is mainly distribution between 0.6-5.8m/s, the biggest of the final speed is generally 1.0m/s; and rainfall raindrops is mainly composed of the particle size of 0.125- 0.5mm rainfall raindrops. The rainfall raindrops speed of 0.125mm diameter is mainly distribute between 0.6-1.8m/s, the rainfall raindrops speed of 0.25mm particle size is mainly distribute between 0.8-1.8m/s, the rainfall raindrops speed of 0.375mm distribute in the 1-1.8m/s, the rainfall raindrops speed of 0.5mm particle size of the raindrops mainly distribute in the 1.0-2.2m/s.
Optimal Configuration of Energy Storage Systems in Virtual Power Plants Including Large-scale Distributed Wind Power
Authors: Han Ninghui , Wang Xuanyuan , Chen Songsong , Cheng Lin , Liu Haitao , Liu Zhen , Mao Yingying
Published: July 2019

With energy shortages and environmental pollution becoming increasingly prominent, the power industry is inevitably facing enormous challenges. Distributed power supplies are reliable, flexible, economical and environmentally friendly, while they are widely distributed in number and have great volatility and randomness. The virtual power plant (VPP) helps to integrate a large amount of distributed energy in the smart grid, providing a proven solution to the above from a new perspective. Based on the virtual power plant with large-scale distributed wind power, this paper studies the optimal configuration model of energy storage system(ESS). According to economy, load shifting and safety norms in the energy storage system, the optimal objective function of the energy storage system is established. The model is solved by particle swarm optimization algorithm, and the feasibility of the proposed model is verified by an example. It is concluded that optimization result is affected by weight factors and to the three roles of energy storage system.
A route optimization method based on simulated annealing algorithm for wind-assisted ships
Authors: Li Yuankui , Qiao Chunfu
Published: July 2019

Aimed to the global demand for energy-saving and emission-reduction, and urgent need of shipping industry to cut down fuel costs, the wind-assisted ships are taken as an effective way for energy-saving and emission reduction of transoceanic crossing ships, this work focused on route optimization model to provide theoretical basis and technical support for wind-assisted ships. Firstly, this work analyses the route optimization of the wind-assisted ship, and two optimization objectives are defined. Secondly, the route optimization models for the minimum fuel consumption under the limited voyage time and the minimum voyage time on the condition of fixed main engine power were built separately, and the optimization algorithm based on simulated annealing was designed. At last, a 76,000DWT wind-assisted ship was taken as the experimental ship, and the feasibility and rationality of the model and algorithm was verified. As the simulation shown, the optimal route solved in this paper is effective in path planning problem of wind-assisted ship and has practical significance.
Design of a high efficiency electro-Fenton system with Fe0@Fe3O4/ACF composite cathode for lignin wastewater treatment
Authors: Li Haiyan , Zhou Maojuan , Chen Yiming , Li Yan , Chen Xing , Gao Xibo , Xiao Cong
Published: July 2019

Lignin is a complex phenylpropanoid biopolymer conferring mechanical strength to plant cell walls. Biorefineries, along with pulp and paper industry, generate large quantities of lignin. Lignin valorization is an essential process for an advanced, sustainable, and economical biomass-based industry. In this study, for the first time nanostructured Fe0@Fe3O4 was loaded on active carbon fiber (ACF) as an oxygen diffusion cathode to be used in a heterogeneous electro-Fenton (E-Fenton) oxidation system. This novel Fe0@Fe3O4/ACF composite cathode was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), BET surface area analysis, transmission electron microscopy (TEM). On the degradation of lignin in water, this heterogeneous E-Fenton system with the Fe0@Fe3O4/ACF cathode showed much higher activity than other E-Fenton systems with commercial zero valent iron powders (Fe0) and Iron ions (Fe3+) under same condition. On the basis of experimental results, we proposed a possible pathway of lignin degradation in this heterogeneous Fe0@Fe3O4/ACF E-Fenton process. This heterogeneous E-Fenton system is very promising to remove organic pollutants in water.
The impact of virtual water strategy on domestic inter-regional agriculture products trade of China
Authors: Hu Mengting , Cai Rong , Guo Huiting , Song Dan , Liu Jing , Hou Shan , Bai Xue , Lin Ling , Zhang Lijia
Published: July 2019

Faced with increasingly severe pressure on water resources, virtual water and virtual water trade theory provide a feasible solution to improve global water use efficiency for agricultural product and to alleviate the pressure on water resources in water-scarce countries or regions. However, virtual water strategy has not been considered in domestic inter-regional agriculture products trade of China. In this research, we will create scenarios, from two aspects of economy and the allocation and utilization of water resources, to study the impact of virtual water strategy on domestic inter-regional agriculture products trade of China. Two kinds of scenarios will be created. One kind of scenarios does not consider the virtual water strategy, which only consider the economic revenue - net social revenue maximization scenario. The other kind of scenarios considers the virtual water strategy - water resource balance scenario. And we will research the impact of virtual water strategy will be made on domestic interregional agriculture productions trade of China. The result shows that virtual water strategy could make advantage impact on the allocation and utilization of water resources by domestic inter-regional agriculture products trade of China. But domestic inter-regional agricultural products virtual water trade of China considered the virtual water strategy would cause great negative impact on net social revenue.
Research progress in friction stir welding of steel and aluminum
Authors: Kai Xu , Qi-rui Cui , Guo-qiang Li , Shu-quan Zhang
Published: July 2019

Only by obtaining a good comprehensive performance of steel/aluminum dissimilar metal joints can the steel/aluminum dissimilar metal joint structure be used more widely in the field of national defense and national production. However, cracks and intermetallic compounds are easy to occur during welding of steel/aluminum, which seriously affects the quality of welded joints. As a kind of low temperature and high efficiency solid phase bonding method, friction welding has been attached great importance in the field of new material connection and high performance equipment manufacturing. Among friction welding methods, the friction stir welding has been paid more and more attention because of various types of welded joints. In this paper, the research progress of friction stir welding of steel/aluminum is introduced from the form and process parameters, which provides the basis for further research.
Analysis of the Reasons for Insufficient Output of an Ultra-supercritical Unit
Authors: Lu Jin , Chen Lin Guo , Chen Wen , Liu Zhuan , Yan Bo , Wan Zhong-hai
Published: July 2019

An ultra-supercritical steam turbine unit is N660-25/600/600 type intermediate reheat, single-shaft, three-cylinder four-row steam and double-pressure condensing steam turbine manufactured by Dongfang Steam Turbine Co., Ltd. Through relevant certification, the nameplate capacity of the unit was expanded to 700MW. Since the winter of this year, the unit has had insufficient output. According to the historical data of the site, the reasons for the insufficient output of the unit were analyzed. The diagnosis conclusion is that the reduction of the flow area of the high-pressure cylinder is the main reason for the limited output of the unit.
Calculation Method of Influence of Relative Efficiency Change of Steam Turbine Cylinder on Heat Loss
Authors: Chen Wen , Lu Jin , Chen Lin Guo , Cai Wen , Wan Zhong-hai , Yan Tao
Published: July 2019

Based on the equivalent heat drop theory, the calculation method of the influence of the relative internal efficiency change of steam turbine cylinder on heat loss is proposed. The numerical results show that the method can more accurately evaluate the effect of efficiency change of each cylinder on heat loss, and provides a theoretical basis for the thermal economic diagnosis of steam turbine.
Influence of Delay Analysis and Research on The Thermal Power Unit’s PFC Performance
Authors: Li Jun , Liao DaPeng , Yang PengWei , Gao Song , Lin Bo
Published: July 2019

Primary frequency control(PFC) of thermal power unit is an important means to ensure power supply frequency and safe and stable operation of power grid. Through the analysis and research of the PFC standard of the power grid, combined with the control structure of conventional thermal power units, it is pointed out that the delay and inertia inherent in the unit equipment have a negative impact on the PFC performance. From two directions of field dynamic test and laboratory simulation, existing problems of currently widely used control structures are clearly defined, and the technical means of reducing the influence of delay on PFC are proposed. The practical application results show that the proposed method can effectively reduce the overshoot of the PFC system and ensure that the system recovers quickly and stably.