bluuebunny/crossref_metadata_2025 huggingface dataset:
Granulated biofuels combustion efficiency
Authors: Lyubov V K , Popova E I , Popov A N
Published: July 2019

The article presents the results of experimental studies of the thermal and ecological performance of the Firematic 60 boiler manufactured by Herz Energietechnik GmbH. Wood pellets with diameter of 6 and 8 mm and biochar from hydrolytic lignin were used for combustion. The components of the boiler’s heat balance and the emission of harmful substances were determined during the burning of the biofuels. In the course of experimental work high energy and environmental performance of the Firematic 60 boiler was reached while working on granulated fuel which gives a reason to recommend this boiler for heat supply of low-rise buildings in the conditions of the Arctic region. Organized in Onega City production of biocahar from hydrolytic lignin allowed to obtain high-quality fuel from biomass that has remained in dumps for 40-60 years. Experimental data on the change in the apparent and bulk density, mechanical durability of wood pellets thermally pretreated for 90 minutes in an electric furnace without oxygen at temperatures of 200, 250, 275 and 300 °C was obtained. It has shown that with an increase in the temperature of wood pellet torrefaction all these parameters decrease. The influence of the torrefaction process parameters of the hydrolytic lignin on the sorption properties of the biochar has been studied; sorption properties have been compared for the granules produced from the hydrolytic lignin and coniferous wood.
Effect of ultrasonic treatment on the sorption properties of the pyrolysis product of sludge
Authors: Nasyrov I A , Mavrin G V , Shaikhiev I G , Terentyeva V V
Published: July 2019

Annotation

In the article, the object of the study is a sorption material obtained by low-temperature pyrolysis from a sludge of a biological sewage treatment, and processed by ultrasound. Ultrasonic treatment is one of the methods for improving sorption characteristics by increasing the specific surface area. The adsorption capacity of pyrolysis products by methylene blue on a UNICO 2800 spectrophotometer and iodine by the titrimetric method was studied. An increase in sorption activity after ultrasonic treatment on the sorption material was found: by 2.3 times for methylene blue, 2.5 times for iodine. Sorption properties with respect to iron, copper, nickel, and zinc ions under static conditions using the atomic-emission spectrometry method with inductively coupled plasma on the Agilent 720-OES spectrometer were studied. The degree of extraction of heavy metal ions using the pyrolysis product of sludge after ultrasonic treatment reaches: for Fe – 98.7%, Ni – 84.4%, Cu – 90.5%, and Zn – 95.2%. Ultrasonic treatment with a frequency of 35 kHz for 30 minutes allows to increase the sorption capacity of the product of pyrolysis of mud sediments by Ni ions by 2.4 times, Cu - 1.2 times, Zn - 1.7 times.
Degassing of water with exhaust gases of the boiler
Authors: Sharapov V I , Kamalova R I
Published: July 2019

A method for degassing the make-up water is described, the feature of which is the use of the exhaust gases of the boiler after the smoke exhauster as a desorbing agent. In the exhaust gases of the boiler, there is a small portion of corrosive oxygen, due to the fact that all oxygen is consumed in the combustion process in the furnace. The problem of the possible saturation of the deaerated water with carbon dioxide due to its increased content in the boiler waste gases is solved by dispensing the alkaline agent into the make-up water. The mass exchange efficiency of the make-up water degassing by the proposed method is estimated, the required specific consumption of the exhaust gases for deaeration is theoretically calculated. It is shown that the consumption of the desorbing agent, which is the exhaust gas, is sufficient for degassing practically any quantities of nutrient and make-up water.
About the intensification of convective heat transfer from combustion products to the walls of a cylindrical shaped pulsing combustion chamber
Authors: Sitnikov O.R. , Pavlov G.I. , Khakimzyanova Y.I.
Published: July 2019

Franke’s critical dependence determines the theoretical relationship for the numbers Nu for pulsating and stationary flow regimes. It is based on the heat exchange intensification hypothesis due to the interaction of the pulsating velocity profile and the boundary layer near the heating surface. The article presents the results of studies to test the efficiency of the Franke’s ratio for a given range of pulsed combustion chamber diameters, as well as to determine the influence of the geometric parameters of the chamber on the convective heat transfer from the combustion products to the walls of the chamber
The study of the temperature field in pebble beds with volumetric heating and radial flow of coolant
Authors: Smorchkova Yu V , Varava A N , Dedov A V , Zakharenkov A V , Komov A T
Published: July 2019

The paper presents the results of an experimental and numerical study of hydrodynamics and heat transfer in a pebble bed with internal volumetric heat release. An experimental setup was designed to investigate the hydrodynamics and heat transfer at the radial flow of a single-phase coolant. The pebble bed was set from 2.0 mm diameter sphere made of AISI 420 steel. The internal heat release model in the pebble bed is provided by high-frequency induction heating, whereby the thermal power of the high-frequency installation is 20 kW. The experiments were carried out in the range of mass flow rates of 0.1 - 0.6 kg/s. The test section simulates the fuel assembly of a nuclear reactor with microfuel. Pebbles are placed between the inner and outer perforated covers. Radial coolant flow is achieved to minimize pressure losses. The inner cover is cone-shaped and is the dispensing manifold for the coolant. The conical shape of the cover provides a uniform flow rate of the cooling liquid along the length of the test section. The temperature distribution in the pebbles were recorded.
Optimization of combined heat and power plant operating mode by means of underutilized equipment mothball
Authors: Sukhareva Evgeniya , Fedyukhin Alexander , Derevianko Oleg , Egorov Mikle , Mukhametova Liliya , Akhmetova Irina
Published: July 2019

This work makes it possible to link ground rules for thermal and electrical energy markets with generation plant operating. Here we consider various procedures for optimization of combined heat and power plant operating mode by means of underutilized equipment mothball. This work results in process flow diagrams for turbine hall and relative increment charts, which can be used for plant loading in the optimal way.
Increasing the efficiency of energy use in the thermal scheme of a steam boiler house
Authors: Valiev R N , Ziganshin Sh G , Maryashev A V
Published: July 2019

Annotation

This article discusses the issues of increasing the efficiency of energy use in the thermal scheme steamed boiler house. A positive effect is achieved by transforming the excess energy of water vapor into electricity and avoiding the use of steam at the stage of heating the raw water.
Scheme of joint operation of an absorption heat pump and combined-cycle plant
Authors: Valiev R N , Ziganshin Sh G , Maryashev A V
Published: July 2019

Annotation

In this paper, we propose and consider a scheme for the combined operation of an absorption heat pump and a combined-cycle plant. A computational study was carried out and the results confirming the effectiveness of the scheme were obtained. The heat power of the gas heater of the network water due to the inclusion of an absorption heat pump is increased by 12-14% from its previous value.
Numerical modelling of energy efficient exhaust orifices and hoods in ventilation and air conditioning systems in buildings and facilities of thermal power plants
Authors: Ziganshin A M , Batrova K E , Logachev K I , Mingazeeva D N
Published: July 2019

The paper presents the results of numerical simulation of energy-efficient inlet parts of exhaust ventilation systems in the form of the last side orifice and an exhaust hood. The profiling of the inlet sharp edges is used, which is made according to the outlines of the vortex zones that generates when the flow is separated at this edges. For this, the non-profiled geometry of the exhaust orifices is first modelled, where the outlines of the vortex zones are determining. Then a numerical model with profiling is created and the energy losses of such an improved shaped elements is determined. A significant reduction in pressure loss has been obtained: for the exhaust hood more than 40% and 30% for the last side orifice.
Method of calculation of power efficiency by optimization of work of heat supply systems
Authors: Zvonareva Yu.N. , Vankov Yu.V.
Published: July 2019

In this work results of mathematical modeling and results of the pilot studies conducted at the laboratory stand for the system of heat supply of Kazan, the development of power of the large cities directed to development of an integrated approach at a research of problems are integrated. By means of the program Zulu complex the mathematical model intended for optimization of work of power systems during their operation has been created.Results of the conducted researches have allowed to analyse influence of stage-by-stage introduction at consumers of automatic metering stations and weather regulation (AITP) on a hydraulic operating mode of system of heat supply for large municipal associations. In this work the main criteria are also considered, the algorithm and a method of calculation of power efficiency is developed by optimization of systems of municipal heat supply by introduction of the automated individual thermal points (AITP). The questions of influence of the made technical solutions on financial and economic and investment indicators are raised. The considered actions for energy resources saving are investigated for the purpose of reduction of volumes of consumption or more rational use of fuel and energy resources.
Retrospect and Prospect of Research on Resource and Environment Carrying Capacity
Authors: Ma Jingjing , Guo Kai , Wu Zhuolin , Liu Yiming
Published: July 2019

The carrying capacity of resources and environment is an important topic in the study of sustainable development. It is of great significance to analyse and summarize the relevant progress at home and abroad for future research in this field. This paper analyses the domestic and foreign bearing capacity related literature in chronological order, and divides the development process of bearing capacity into four stages: concept proposing, connotation expansion, method and model development, and comprehensive bearing capacity. And the progress in the evaluation and evaluation methods of bearing capacity in recent years is reviewed. According to the research status at home and abroad, it is proposed that the research should be strengthened in the aspects of comprehensive urban carrying capacity, index system and improvement of quantitative methods.
Analysis of Eco-epidemiological SIS Model under Sparse Effect
Authors: zhang Yong-po , ma Ming-juan , li Xue-fei
Published: July 2019

In this paper we formulated and analyzed the eco-epidemiological SIS model under sparse effect, and the sufficient condition of the local asymptotical stability of the equilibrium was studied with the method of latent root, analyze the global asymptotical stability of the boundary equilibriums, and also discuss the local asymptotical stability of the positive equilibrium, and established the sufficient condition of their stability.
Analysis of water sensitivity and microstructure for silt in Zhengzhou area
Authors: Lu Tian-You , Tian Yi-Chuan , Li Xin-Ming , Liu Chen-Hui
Published: July 2019

In order to study the evolution mechanism of Zheng Han Gu Cheng, direct shear tests and disintegration test were carried out by using the scattered soil of Zheng Han Gu Cheng to prepare the samples with different water content, and the microscopic mechanism of water sensitivity characteristics for silt was analyzed by field emission scanning electron microscope. The test results show that the stress-strain curve of silt behaves as hardening type based on different water content, and with the increase of water content, the shear stress increases first and then decreases, and reaches the maximum at the optimum water content. The variation on shear strength with water content is consistent with that of shear stress. With the change of water content, the cohesion reaches its peak at the optimum water content, while the internal friction angle changes little, and the difference is about 1.7 degrees. With the increase in water content, the disintegrating rate of specimen decreases gradually due to the influence of water film. From the SEM images of different water content, it can be seen that silt has the least pore size, dense grain arrangement and mosaic structure under the optimum water content, which greatly improves the strength of soil samples. With the change of water content, the micro-structure of soil gradually develops from loose structure of dense structure, then to mosaic mechanism, and finally to directional arrangement structure. The above research results can provide a theoretical basis of the protection and reinforcement of ancient city walls.
Effect of Ampicillin wastewater on the T-AOC and LDH activities of Zebrafish
Authors: Wang Yaxue , Wu Pengpeng , Shen Hong-Yan
Published: July 2019

In order to define eco-toxicity effect of Ampicillin wastewater on zebrafish, the indoor exposure method was used to study the impact of Ampicillin wastewater on zebrafish. In this study, zebrafish was exposed to ampicillin wastewater of 0.5%, 1.0%, 1.5% and 2.0% groups for 15 days to study the effect of T-AOC (Total Antioxidative Capacity) and LDH (Lactate Dehydrogenase) activities. According to the experimental data, the T-AOC and LDH activities in zebrafish muscle tissue had changed significantly during the period of exposure. The experimental results showed that the T-AOC value of zebrafish in each exposed group showed a “Λ” type change trend. On the 6th day, the 2.0% exposed group reached the maximum value of the whole test period (6.5399U•mg−1). The change of LDH activity was similar to that of T-AOC activity, showing a trend of “sharp increase--decline”. Among them, on the 12th day, the 1% exposed group reached the maximum (792.28 U•mg−1). The research shows ampicillin wastewater can cause some degree of oxidative damage to zebrafish.
Research on Transportation Infrastructure Investment based on Economic Sustainable Development
Authors: Zhang Yaoyao
Published: July 2019

The article explored the influence of transportation infrastructure investment on economic sustainable development with time series data of 1981-2017. Additionally, the cointegration theory and Grainger causality test were applied to analyse the relationship between transportation infrastructure investment and economic sustainable growth based on the C-D production function model. The results show that the investment in transportation infrastructure still has a stable effect on promoting long-term and short-term economic development.
Overview of research situation and progress on compressed air energy storage technology
Authors: Huang Baohua , Qiu Xiaozhi , Wang Weimeng , Li Hongzhi , Zhou Weiqing
Published: July 2019

So far, compressed air energy storage (CAES) system is another effective technology for large-scale energy storage which can improve grid flexibility and realize the grid generation of renewable energy. This paper reviews the developments of CAES technology including operation principles, application fields, technology performance of different types of CAES system and the current state-of-art. Finally, the potential key application prospects of CAES in future are discussed.
Sedimentation process of Cr and the mechanism in the bay mouth of Jiaozhou Bay 1983
Authors: Yang Dongfang , Wang Fengyou , Zhu Sixi , Huang Chengling , Fan Bailing
Published: July 2019

The investigation data on Chromium (Cr) in waters around the bay mouth in Jiaozhou Bay in May, September and October 1983 showed the sedimentation process of Cr, and tried to reveal the mechanism. Results showed that the change ranges of absolute horizontal loss and relative horizontal loss were 0.04-0.89 μg L−1 and 3.44-80.00%, respectively. The absolute vertical accumulation amount and relative vertical accumulation amount were 0.14-0.86 μg L−1 and 8.86-86.86%, while the absolute vertical dilution amount and relative vertical dilution amount were 0.01-0.62 μg L−1 and 0.85-37.50%, respectively. The absolute vertical dilution amounts in waters in the bay mouth were very high (86.86%) and relative high (37.50%) in May and September, respectively. The bay mouth was playing a role of parclose in which a big part of Cr was filtering continuously. The mechanism of the sedimentation process was that, the horizontal loss of substance content was very high when the marine current was moving across the bay mouth, and there was high sedimentation process in the bay mouth. In spite of the flow rate of marine current was increasing in the bay mouth, Cr in the open waters was difficult to be transported to the bay, and Cr in the bay was also difficult to be transported to the open waters.
Spatial motion process of Cr in the bay mouth of Jiaozhou Bay
Authors: Yang Dongfang , Li Haixia , Lin Dong , Zhang Yuan , Wang Qi
Published: July 2019

by the investigation of Chromium (Cr) dataset in waters around the bay mouth in Jiaozhou Bay in1983, calculated were the absolute and relative horizontal loss, and vertical accumulation and dilution amounts, and identified the spatial motion processes. Results showed that the absolute and relative horizontal losses were 0.12-0.59μg L−1 and 7.69-93.93%, respectively. The absolute and relative vertical accumulation amounts were 0.14-0.86μg L−1and 8.86-86.86%, while the absolute and relative vertical dilution amounts were 0.02-0.62μg L−1and 2.17-80.00%, respectively. Cr was mainly sourced from river runoff and marine current, and was moving to the bay mouth from the inside of the bay mouth and the outside of the bay mouth, respectively. There were high sedimentation processes, and were forming high accumulation processes in bottom waters. Therefore, there were diffusion and sedimentation processes in waters in the inside of the bay mouth and the outside of the bay mouth. This spatial motion process, was named as Yang’s Phenomenon.
Study on Sustainable Development of Iron and Steel Industry—Taking HBIS Group as an Example
Authors: Wang Muwen , Dai Yingying
Published: July 2019

Iron and steel industry is the basic industry of the national economy, playing an important role in China’s economic development. However, with the rapid development of iron and steel industry, the problems increasingly exposed. Taking HBIS as an example, firstly on the basis of existing theory, gathering 2008-2015 HBIS product data as the basic data, this thesis has some study results showing that in recent years, the iron and steel industry developed rapidly, but there are also problems, such as irrational product structure, frequent trade friction, lacking of iron ore pricing power, severe overcapacity and serious haze. Finally, this paper proposes innovative suggestions for HBIS aimed at the problems, such as the continuous technological innovation, regional merger and acquisitions. These initiatives may promote the development of China’s steel industry.
Analysis of Energy Saving Status of Rural Residential Buildings in Northern China
Authors: Hou Lei , Chen Weijiao , Gao Jianling , Zhao Yuqing
Published: July 2019

Based on the characteristics of rural architecture in China and the living habits of farmers, this paper investigates the research status of domestic passive energy-saving technologies and active-passive combined energy-saving technologies and their application effects in rural residential buildings, and draws guiding conclusions for rural residential design and renovation in northern areas.
A novel analytical method for the in-depth study of the effects of humidity and temperature on the adsorption of volatile organic compounds
Authors: Qiang Ning , Shi Tianzhe , Liu Tao , Cao Yiqi , Miu Haichao , He Jiao
Published: July 2019

We further explored the effect of temperature and humidity on the adsorption of volatile organic compounds on activated carbon. The equilibrium adsorption capacity of methylene chloride and water on activated carbon at different temperatures and different absolute and relative humidity was determined by dynamic adsorption method using dichloromethane as the target. The temperature and humidity are controlled by the temperature regulation and humidity control process. Regression analysis was performed on dichloromethane concentration, temperature and absolute humidity. The regression analysis yielded the equation: Y=0.01138X1-0.000968X2-0.000326X3+0.0492.
Which Factors Influence Chinese Farmers to Adopt Formulated Fertilization Technology?
Authors: Tang Yan , Yang Cuibai
Published: July 2019

Soil testing and formulated fertilization program has developed in China for more than ten years. This study examines the influence of psychological factors, farmer characteristics and soil testing policies on farmers’ intention to apply fertilizer. An expanded version of the theory of planned behavior is used as a framework. The results for the all farmer’ sample show that age, planting type and policy are significant and positively associated with farmers’ intentions. With psychological variables attitude, subjective norms, perceived behavior control and perceived resource levels increase by one unit, the probability of farmers changing fertilization behavior according to the soil testing system increased by 2.20%, 1.57%, 3.26%, 3.24% respectively. With the variable planting type being horticultural crops, age between 35 and 44, agricultural technology training and formulated fertilization system increased by one unit, the probability of farmers changing the fertilization behavior according to the soil testing system increases by 8.05%, 8.48%, 5.05% and 6.08%, respectively. Policy recommendations are made based on these results.
Linear programming Monte Carlo method based on remote sensing for ecological restoration of degraded ecosystem
Authors: Sun Ling , Zhu Zesheng
Published: July 2019

A linear programming Monte Carlo method (LPMC) is proposed to achieve the optimal restoration of the whole degraded coastal wetland ecosystem, i. e. the minimum restoration cost, in the case of uncertain ecological restoration costs of different degraded coastal wetlands. LPMC can comprehensively and systematically complete the dynamic analysis of coastal wetland ecosystem restoration cost, including the uncertainty analysis of ecological restoration cost and the screening of equivalent robust solutions. The applicability of this method is demonstrated by solving a practical problem of ecological restoration of coastal wetlands. The results show that this method can generate the robust optimal solution block for the globally optimal objective function and decision variables under the condition of restoring cost uncertainty, including a variety of optimal solutions adapted to the different needs.
Research on the Predicament and Countermeasures of Sustainable Development Education in Colleges and Universities
Authors: Xiang-chao Pan
Published: July 2019

Sustainable development education is an important part of sustainable development strategy. As the main force of personnel training, colleges and universities are important places for sustainable development education. Only by carrying out sustainable development education in university campuses can future builders have a scientific concept of sustainable development and sufficient knowledge of sustainable development. College students are the backbone of the sustainable development of the environment, society and economy in the future. Therefore, it is of great significance to solve the dilemma of sustainable development education in Colleges and universities and to carry out sustainable development education among college students.
Benefit Analysis of Soil and Water Conservation of Two Typical Economic Forests in Yuyao City
Authors: Lu Fangchun , Li Gang , Wang Ran , Zhang Jinjuan
Published: July 2019

In this study, the typical economic forests (Phyllostachys pubescens and Myrica rubra forests) in Yuyao City, Zhejiang Province, were taken as research objects. Rainfall, runoff and soil loss data were collected from runoff plots with different measures. The differences of soil and water loss in different measure plots were studied by benefit analysis and regression analysis. The results showed that natural Phyllostachys pubescens and Myrica rubra forests had better soil and water conservation benefits. Human disturbance will increase the runoff by more than 19% and soil loss by more than 55%. There was a significant regression relationship between rainfall-runoff-soil loss in the two forest lands, but the regression curve type was affected by vegetation structure and soil properties.
Influencing factors of the horizontal distributions of Pb in surface and bottom waters
Authors: Yang Dongfang , Zhang Longlei , Lin Dong , Yuan Xianpeng , Li Haixia
Published: July 2019

By the investigation dataset on Plumbum (Pb) in surface and bottom waters in waters from the bay center to the bay mouth in Jiaozhou Bay 1990, the analysis in this paper unveiled the seasonal variation and horizontal distribution of Pb. the results would determine that In May and August 1990, Pb contents in surface waters in Jiaozhou Bay were 4.64-13.39 μg L−1 and 3.84-11.01 μg L−1 respectively, compared to 4.64-9.41 μg L−1 and 2.96-8.86 μg L−1 respectively in bottom water. In according to the high values, Pb contents could be considered as moderate polluted, while in according to the low values the pollution level was slightly polluted. Pb contents were in order of spring > summer in both surface and bottom waters. The source inputs of Pb to this bay were different in different seasons and locations, resulting in different seasonal variations of Pb contents in surface waters. By means of vertical water’s effect, Pb in surface waters were migrating to bottom waters continuously, resulting in the horizontal distributions of Pb in surface and bottom waters were consistent. Pb contents in bottom waters were relatively high/low in case of Pb contents in surface waters were relatively high/low. The seasonal variations of Pb contents in surface waters were mainly influencing by the source inputs, while in bottom waters were mainly influencing by the source input and the sediment process. The horizontal distributions of Pb in surface and bottom waters were consistent in different seasons. In any seasons, or under influences of different major sources, the horizontal distributions of Pb contents in surface and bottom waters were consistent.
Investigation on Oxygenation Performance and Numerical Simulation of Swirling Aerator
Authors: Zhang Bo , Pu Xin , Qi Yongjie , Mao Shuzhou , Wu Zhiren
Published: July 2019

The oxygenation performance of the swirling aerator was evaluated by an air-water system oxygenation experiment. The flow pattern analysis on the oxygenation process of the swirling aerator was carried by PIV measurement and numerical simulation. The test results showed that the oxygen transfer coefficient (KLa) increased with the increase of intake air volume, and the maximum value of KLa (20°C) was 0.721L/min under 8m3/h condition. PIV measurement results showed that the number of tiny bubbles in the water increased with the increase of intake air volume and the bubbles form vortex in the pool with the water flow, which enhanced the mass transfer effect. The maximum number of tiny bubbles appeared at 8m3/h. The results of numerical simulation showed that due to the difference in speed, obvious vortex phenomenon occurs. With the increase of intake air volume, the intensity and quantity of vortex increase, the air-water mixing was more sufficient, and the air volume fraction was higher.So the oxygenation performance was stronger, which was consistent with the PIV measurement and oxygenation test results.
Ecological Game of Animal Populations in Different Environments
Authors: Zhang Yalei , Chang LiJun
Published: July 2019

Under different ecological conditions, the results of animal evolution are different. As global warming and the environment deteriorates, the rate of species extinction is accelerating. Therefore, in this paper, the game between animal populations and ecology is studied, which provides a basis for more scientific protection of animals and environment. First, the animal’s environmental needs are studied: By establishing the relationship between the heat gained by the animal and the required land area, there comes a fact that the more energy the animal consumes, the more land it needs. The land area is related to environmental factors such as temperature and precipitation. Therefore, given the natural conditions of a certain place, the land area can be obtained through the regression equation. Secondly, considering the long-term development, based on the ecological game model, the differential dynamic system is established. In different food supply situations, three game results of population and ecology are obtained: continuous growth, continuous reduction, and cyclical fluctuations.
Effect of Coke Powder Ratio on Particle Emission and Sinter Quality in Sintering Process
Authors: Wang Hui , Zhang Pu
Published: July 2019

Starting from the perspective of source reduction, the emission characteristics of particulate matters in sintering flue gas and sinter quality were studied by a sintering cup based on the fixed carbon 3.6% conditions in sintering raw materials. The particles were sampled by an Andersen 8-stage impactor at the coke powder ratios at 100%, 75%, 50% and 0%. The results showed that the particles in the sintering flue gas were mainly fine particles below 2.63 μm. When the coke powder ratio was 100%, the removal efficiency reached the maximum value of 34.37%. The effects of coke powder ratio on the sinter index were reflected in: when the coke powder ratio reduces, (1) the sintering speed decreases; (2) the solid fuel consumption increases; (3) the drum index improves. Compared with comprehensive indicators, the 100% coke powder was the most conducive condition to the production of enterprise sintering process.
Nickle and Cobalt Spinel Catalyzing Wet Air Oxidation of Refractory Pollutants under Mild Condition
Authors: Jing Qi , Li Huan
Published: July 2019

Refractory organic pollutants are critical issues in water or wastewater treatemnt, and catalytic wet air oxidation (CWAO) is a common method. To improve the efficiency and decrease the reaction conditions, a type of NiCo2O4 (NCO) spinel with urchin-like hollow strucutres was synthesized and used in CWAO of organics at low temperature and atmosphere pressure. Both scanning electron microscopy and X-ray photoelectron spectra were used to characterize NCO. The 3-D hierarchical architectures, solid state redox couple M2+/M3+ (M represents Ni or Co), and plenty of surface oxygen species were proved. Furthermore, the reaction path of CWAO with NCO as the catalyst was concluded, i.e. consecutive adsorption, surface oxidation, and re-oxidation of reduced NCO by O2. NCO showed excellent catalytic performance in CWAO of refractory organics, such as alkaline lignin and bisphenol A. The removal rates of total organic carbon exceeded 80% within 3 h. These findings promise a convenient and economical way for the treatment of refractory organics in water or wastewater.
Policy Suggestions on Government-led Rural Habitat Environmental Governance
Authors: Wang Zhi
Published: July 2019

The rural settlement of human settlements is the first hardship to implement the rural revitalization strategy. Improving rural living environment as an important aspect to solve the imbalance between urban and rural development and inadequate rural development is the starting point for urban-rural integration and the basic guarantee for rural areas to enter a well-off society. Rural sewage treatment and domestic garbage are the key and difficult points in the renovation of human settlements. Based on the field researchs of the major cities in China, this paper discusses the role of government-led in light of the current situation, combined with the theory of public management and the actual situation of China’s township work, in order to explore a government’s management path for the effective management of rural human settlements.
Effects of exogenous silicon on the adsorption kinetics characteristics of arsenic in soils of acidic paddy fields in northeast china
Authors: Yang Dan , Wang Yayun , Yang Tianyu , Guo Lei , He Na
Published: July 2019

To explore the effects of exogenous silicon on the adsorption characteristics of arsenic in paddy field soils, the impacts of silicon on adsorption kinetic characteristics of arsenic in the acidic paddy field soil in northern China were studied under neutralizing alkaline of Sodium Silicate and balancing Na+ of different treatments. The results indicated that silicon reduced the adsorption amount of arsenic in soils and shortened the adsorption equilibrium time. The adsorption process of arsenic in the soil could be well described by Elovich equation. Silicon increased the equation parameters α and β values, which indicated that exogenous silicon could accelerate the initial arsenic adsorption rate in soils and reduce the reaction rate during the absorption process.
The research summary of rural logistics distribution system based on e-commerce
Authors: Qiao Youfeng , Wang Jing , Meng Bo , Yu Xiaohan , Li Yiru , Xu Tongwen , Qiao Youfeng
Published: July 2019

This paper analyzes the present situation of rural e-commerce logistic distribution, and puts forward the logistics mode of e-commerce distribution combined with the Internet. According to the characteristics of rural e-commerce distribution, we construct the three-level logistics network structure of rural e-commerce under cloud distribution mode, realize the two-way logistics of rural e-commerce, optimize and maintain the constructed logistics information platform. Thus reduce logistics return rate and waste of resources.
Design of Environmental Monitoring System for Sports Stadiums and Gymnasiums of Jiangxi Teachers College in China
Authors: Gao Jianxin , Gao Jianjun , Shu Yuan
Published: July 2019

With the application of basketball hall, swimming pool, comprehensive gymnasium and field hall in the new campus of Jiangxi teachers college, the monitoring and construction of the safe environment of sports teaching venues have aroused the common concern of schools, sports bureaus and other relevant departments. Taking the gymnasium of Jiangxi teachers college as an example, this paper proposes a gymnasium environment monitoring system based on ZigBee protocol. The system achieves data transmission and processing, information sending and reminding services through temperature, humidity, smoke, CO2 sensors and hardware devices such as ZigBee gateway. The application of this system in school gymnasiums and other fitness venues can not only ensure the physical and mental health of students to a greater extent, but also make the management of the gymnasium more efficient, safe and convenient, and solve the shortcomings of traditional management methods, so as to provide scientific decision-making basis for the management of university gymnasiums in China.
Mineral composition and brittleness evaluation of shale gas reservoir in the early Cambrian Qiongzhusi formation of Huize area, Eastern Yunnan Province
Authors: Wen Yiming , Cheng Yong , Liu Cong , Xia Jianbo , Chang Lantian
Published: July 2019

The brittleness of shale gas reservoir determines the effect of fracturing reconstruction, which is of great significance for improving shale productivity. The study of shale brittleness evaluation can provide basic data for fracturing design. The mineral composition characteristics of shale gas reservoir in the early Cambrian Qiongzhusi formation of Huize area, Eastern Yunnan Province are reported in this paper, and the brittleness is evaluated according to the proportion of brittle minerals in total minerals. The results show that the mineral composition of the reservoir is complex. After comparing the brittleness index calculated by different formulas, it is considered that the minerals with high young’s modulus and low poisson’s ratio should be considered as brittle minerals, which is conducive to the universality of the brittleness index formula and the objectivity of reservoir brittleness evaluation. Shale gas reservoir of Qiongzhusi formation is obviously divided into two sections: the layers of 1 to 7 with a large brittleness index (77.60% on average) on the lower part are beneficial to reservoir fracturing reconstruction, while the layers of 8 to 14 with a small brittleness index (37.78% on average) on the upper part are not conducive to reservoir fracturing reconstruction. This study is conducive to guiding further exploration and development of shale gas in the research area.
Effects of AMF infection on photosynthetic characteristics of tomato under salt stress
Authors: Xie Yongdong , Yang Luxi , He Zhongqun
Published: July 2019

A pot experiment was conducted to study the effects of arbuscular mycorrhizal fungi (AMF) Glomus mosseae-2 on photosynthetic characteristics of tomato under different concentrations of NaCl (0.3%, 0.6% and 1%) stress. The results showed that salt stress reduced the net photosynthetic rate and light saturation point of tomato. Although AMF did not increase the light saturation point of tomato, it could increase the net photosynthetic rate, stomatal conductance, apparent quantum yield and CO2 carboxylation efficiency of the leaves, and improve chloroplast photophosphorylation activity, which was conducive to maintaining the ability of chloroplast to absorb light energy and improving tomato light energy conversion efficiency and CO2 utilization efficiency. When the inoculated and non-inoculated plants were treated with 0.3-0.6% NaCl, the photosynthesis decline was mainly affected by stomatal limitation, after 28 days of treatment with 1% NaCl, the decline of photosynthesis was mainly affected by non-stomatal factors, and inoculation with AMF could improve the photosynthesis of tomato under salt stress.
Practical Study on Standardization of Local Ecological Civilization-A Case Study of Zhangjiakou
Authors: Shan Hou , Bingsheng Xu , Ling Lin , Geng Wang , Yan Li
Published: July 2019

The basic compositions of the systematic framework in line with the characteristics of Zhangjiakou was determined and the basic framework for the standard system of the ecological civilization standardization in Zhangjiakou was proposed in this study based on the related policies and mechanisms for ecological civilization construction in Zhangjiakou, the survey over the pilot project and the study on standardization development in the field of ecological civilization, in combination with the main tasks and related evaluation indexes of ecological civilization construction, so as to promote the coordinative development of ecological environment and support the construction of ecological civilization in Zhangjiakou.
Optimized inhibition on Microcystis aeruginosa by combined use of UV-C irradiation and hydrogen peroxide
Authors: Zheng Jie , Zhou Tingru , Tao Yi
Published: July 2019

In order to optimize H2O2/UV-C treatments on suppressing cyanobacterium, apoptotic-like and necrotic growth suppression were investigated respectively. Results showed that apoptotic-like algal inhibition exhibited a positive correlation with UV-C dose in the study period. Dosing strategy for apoptotic-like inhibition is that an environmentally friendly H2O2 dose should be determined with priority. Then, UV-C dose should be mediated to achieve a specific objective for algal inhibition. For necrotic inhibition, increasing H2O2 dose exhibited weak enhancement in growth inhibition while existence of UV-C irradiation could negatively influence following cell lysis after treatments. Hence, dosing strategy for necrotic inhibition is that a moderate H2O2 dose without UV-C irradiation should be efficient in achieving a specific objective for algal inhibition. For mechanism of death switch, given a specific UV-C dose, corresponding high H2O2 dose could cause a deficiency of ATP and switch from apoptosis-like to necrosis.
Effects of Formulated Fertilization on Fruit Quality of Early Ripe Peach ‘Beijing 2’
Authors: Liang Dong , Wang Jin , Xiao Qiao , Xia Hui , Liu Lei , Lyu Xiulan
Published: July 2019

The early ripe peach ‘Beijing 2’ in Shanquan Town, Longquanyi District, Chengdu City, Sichuan Province of China was used as the material to study the effects of formulated fertilization on the fruit quality of peach. Compared with the control, each treatment had the effect on the quality of ‘Beijing 2’ peach fruit. Base fertilizer of organic fertilizer 600 kg/667m2, urea 12-20 kg/667m2, monoamine phosphate 24 kg/667m2, superphosphate 80 kg/667m2, potassium sulfate 56 kg/667m2; germination fertilizer application borax 6 kg/667m2, urea 10 kg/667m2; hard-core fertilizer compound fertilizer 40 kg/667m2, potassium sulfate 20 kg/667m2 had the best effect, making ‘Beijing 2’ peach single fruit weight, hardness, TSS, total sugar and VC increased by 21.97%, 320%, 21.33%, 15.69% and 54.01%, respectively, compared with the control. By formulated fertilization, the application of organic fertilizer 600 kg/667m2, fertilizer reduction 80-96 kg/667m2, fertilizer application decreased by 23.53%-28.24%, and improved the fruit quality of‘Beijing 2’ peach.
Charging Demand Forecasting Method Based on Historical Data
Authors: Shuanglong Shi , Zhe Yan , Shuaihua Li , Da Meng , Yuheng Xing , Huan Xie , Chunyan Wu
Published: July 2019

This paper discusses a method for predicting the demand for charging using transaction data combined with data on the growth of the number of electric vehicles. The prediction result of charging demand can be used as an important reference for charging pile planning. The needs of electric vehicles can be divided into three different scenarios, night scenes, work scenes and entertainment scenes. In each scenario, we used Clark’s negative exponential equation to describe the distribution of charging demand in space.
Application Research of Standard Cost Method in Multiple Material Situations
Authors: Liu Zhiying , Cui Lan
Published: July 2019

Standard cost method is an indispensable part of management accounting system. Standard cost method is a new method that adapts to the idea of scientific management. However, domestic analysis of the difference of standard cost method is too simplistic and cannot meet the cost. In order to meet the needs of management, this paper tries to provide a more practical analysis system to meet the needs of cost management by establishing the difference index and model derivation for the raw material analysis of standard cost method.
Preparation of cellulose sponge from waste newspaper
Authors: Jiang M M , Mei C T , Jiang L Y , Zhou X L , Huang H
Published: July 2019

Using cellulose extracted from waste newspaper as raw material, NaOH/urea aqueous solution as solvent, anhydrous sodium sulfate as pore-forming agent, cellulose sponge with super absorbent capacity was prepared by freezing method, and hydrophobic cellulose sponge was prepared by immersing cellulose sponge into hydrolysate of cetyltrimethoxysilane with different composition. The water absorption and oil absorption of water-absorbent and hydrophobic cellulose sponge samples were tested and characterized by infrared and X-ray diffraction. The results showed that the water absorption of water-absorbent cellulose sponge could reach 560 wt% under the conditions of 3 g of microcrystalline cellulose, 15 g of pore-forming agent and 50 g of NaOH/urea solution. Hydrophobic cellulose sponge was prepared by hydrolysis of hexadecyl trimethoxysilane/SiO2, and the best oil rate was 157 wt%.
Growth Characteristic of Microbubble in a Co-flowing Liquid in Microfluidic Chip
Authors: Sun Lixia , Fan Mingxu , Xu Bo , Yu Huadong , Wang Yue , Zhang Yufeng , Li Peng
Published: July 2019

Experiments of microbubble formation in a co-flowing liquid in polydimethylsiloxane (PDMS) microfluidic chip were developed. The experimental system was set up to investigate the effects of liquid flow rate, gas pressure, gas channel width and concentration of polyvinyl alcohol (PVA) solution on microbubble growth process. Three stages of the bubble growth process were first obtained through experiments. The control variable method was used to explore the growth characteristics of bubbles, such as the volume change rate, the contact angle, the ratio of length to width, and the centroid displacement. This study provides an empirical reference for the growth process of microbubbles in microfluidic chips, which helps to achieve precise control of microbubble volume and generation frequency.
Analysis of Drug Use Rules of Traditional Chinese Medicine for Dysmenorrhea Based on Data Mining
Authors: Bai L , Wei X P , Miao M S
Published: July 2019

Objective: Based on data mining, traditional Chinese medicine is used to treat dysmenorrhea. Methods: using the journal literatures collected by cnki as the data source and using the software of Excel 2013, SPSS Modeler 14.1 and SPSS Statistics 19.0, the association rule analysis and factor analysis of the included standard Chinese medicine were carried out. Results: among the 111 prescriptions included in the standard, angelica sinensis and Corydalis rhizoma were the most common. The medicinal property is mainly warm and smooth, and the bitterness and bitterness are the main ingredients, Meridian of liver in the majority. In association rule analysis, 10 combinations of drug pairs with the highest association strength were found, and 5 common factors were extracted from factor analysis. Conclusion: By using modern information technology and combining TCM clinical data with big data for in-depth analysis and integration, the potential compatibility rules of TCM for dysmenorrhea treatment can be more easily explored and finally fed back to the clinic, providing a basis for clinical safer and more rational drug use and new prescription research and development.
Influence of asymmetric radiation on heat exchange of planar radiant air conditioning and its correction
Authors: ping Li Yu
Published: July 2019

In this paper, the influence of radiation asymmetry on radiant heat transfer in the room of plane radiant air-conditioning system is analyzed. The radiation heat transfer model used in the Fanger thermal comfort equation is introduced. Using Airpak simulation analysis, it is concluded that external Windows and external walls should be taken as separate enclosure structures to calculate the PMV value. A new radiation heat transfer model was established, and the radiation heat transfer was solved under the new radiation heat transfer model. As the radiation heat transfer in the PMV equation, the thermal comfort equation was modified.
Research progress in reduction of carbon dioxide by TiO2-based photocatalytic materials
Authors: Feng Haijun , Li Fangqin , Ren Jianxing , Zhang Xiaotong , Ma Chuang , Hou Xin
Published: July 2019

From the current global energy consumption distribution, traditional fossil fuels still occupy a dominant position, and their share will remain high for some time to come. However, limited non-renewable traditional resources cannot always be used by humans. When they are finally consumed, the consumption of traditional fossil fuels such as oil, natural gas, coal, etc. will generate a lot of greenhouse gases, and the massive emissions of CO2 will cause a series of unfavorable chain reactions. Photocatalytic reduction of CO2 as a hydrocarbon fuel not only reduces the CO2 content in the atmosphere, but also solves the environmental problems brought about by the greenhouse effect, and can provide energy fuel with considerable economic effects. The research progress of photocatalytic reduction of CO2 is reviewed. Some common TiO2-based photocatalytic materials are introduced, and the characteristics of various materials are compared. Finally, the research on TiO2-based photocatalytic materials is prospected