bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on a New Method of Power Grid Zoning and Layering Based on Dijkstra Algorithms
Authors: Wang Qun , Wang Ting , Huo Yingzhe , Xia Fei , Yin Xiaohua , Li Feng , Yu Hua 
Published: August 2019

Abstract
With the development of high voltage grid, it is the trend of future grid development to unlock the electromagnetic loop network and carry out grid layered and partitioned operation. Subarea operation of power grid can effectively alleviate the complex structure of current grid and the serious problem of short-circuit current exceeding the standard. A new power grid partitioning method based on Dijkstra algorithm is proposed. Firstly, according to the knowledge of graph theory, the power network is transformed into a network topology graph, and the impedance of stations and lines in the grid structure corresponds to the nodes and weights in the topology graph. Then, Dijkstra algorithm is used to find the shortest distance from the initial point within the prescribed distance, and the required site and the initial point are divided into the same partition. Taking 500 kV/220 kV power grid as an example, because the development trend of future power grid is that high voltage grade grid plays a supporting role, and the sections are connected through tie lines, so 500 kV stations are selected as the initial point, and finally several zones supported by 500 kV stations are determined. The proposed method can be programmed for fast computation without multiple solutions. Finally, the feasibility and practicability of the proposed method are verified by the example of IEEE30 bus system and the actual power grid in a certain area.
Separately Excited DC Motor Speed Tracking Control Using Adaptive Neuro-Fuzzy Inference System Based on Genetic Algorithm Particle Swarm Optimization and Fuzzy Auto-Tuning PID
Authors: Elhaj Ahmed Mohamed Mohamed , Guo Yanling 
Published: August 2019

Abstract
This paper presents detailed comparative studies to control the separately excited DC motor speed. The configurations of proposed methods are fuzzy auto-tuning PID and Adaptive Neuro-fuzzy inference system. The study intends to optimize the parameters of the transient speed response, for instance, the overshoot, settling time and rise time. Also, a comparison has been made between the two suggested controllers. PID tuned by Ziegler Nicholas’s method utilized as a basis for the proposed controllers. Furthermore, PID model is used to extract the data set for ANFIS configuration, which has been manipulated by genetic algorithm and particle swarm optimization to ensure that it will be able to cover all operation condition possibilities. In order to investigate the eligibility of the suggested controllers, the model of the DC Motor is tested under several conditions. Finally, the results which implemented using Matlab-Simulink toolbox showed that fuzzy auto-tuning PID controller is too complicated, and has slow dynamic response comparing with ANFIS controller. Moreover, ANFIS has rapid robustness efficiency, also in the domain of the motor response characteristics. ANFIS expressed superior proficiency and better Keywords: SEDC motor, fuzzy auto-tuning PID, Adaptive Neuro-fuzzy inference system (ANFIS), genetic algorithm, particle swarm optimization, data set, and FIS. Performance under various experimental conditions.
Analysis on the Cause of Excessive Gas Content in 1000kV Transformer Insulation Oil
Authors: Zhang Wenbo , Guo Fengbo 
Published: August 2019

Abstract
Air tightness of syringe and sampling process were investigated, and gas content of transformer insulating oil was repeatedly measured, Based on the existing problems of excess gas content after partial discharge of 1# main transformer B phase of a 1000kV substation transformer insulating oil during the construction stage. The results show that excessive gas.
Simulation of Train Energy Consumption Based on UAS
Authors: Zhou Hongyu , Feng Jiahui , Shen Jun , Cheng Liu , Wang Qingyuan 
Published: August 2019

Abstract
High-speed trains are all electric locomotives. During the operation of EMU, the power supply network will be cut off due to bad weather, high voltage cable dropping off, catenary failure and power supply system failure, which will cause the whole train line to stop running and a large number of passengers to stay, causing serious harm. Therefore, on the vehicle energy management simulation platform UAS, a large number of simulations have been carried out for different vehicle energy storage, traction constant speed and operation modes, and the effects of initial battery power, constant speed and operation mode on traction energy consumption, auxiliary energy consumption and train operation time have been explored. The simulation has good application prospects in the future intelligent high-speed railway construction.
Simulation Analysis of Frequency Regulation
Authors: Liu Zhijian , Chen Xiaoya , Luo Linglin , Wang Yanhong , Liu Xiaoxin , Yu Sha 
Published: August 2019

Abstract
Frequency is one of the most important parameters reflecting the operation quality of the system. When the system is in steady-state operation, the frequency of the generator in the system is equal under steady-state operation. Because the load is changing at any time, this kind of balance is dynamic. The only way to maintain dynamic balance is to adjust the input power of the generator, so that the actual output of the generator can closely track the change of the load and keep the balance between supply and demand of active power. The essence of frequency control is to regulate and control the active power of all generators in power grid. In this paper, the principle of frequency fluctuation is analyzed, and the physical models of the primary and secondary frequency modulation are established. The simulation results verify the differential regulation of the primary frequency modulation and the no-difference regulation of secondary frequency modulation. It provides an effective basis for the later research of AGC control strategy.
The Mathematical Model for a Prediction of Residual Discharge Time
Authors: Zhang Hanping 
Published: August 2019

Abstract
The mathematical model is established by using the sampling data of the discharge curve of different batteries and the recording data of different attenuation state discharge of the same cell. Analysis of the same batch of new battery at different discharge current intensity test complete discharge curve of sampling data, based on quadratic function model, through matlab simulation, get the current strength of the corresponding function. In order to find the residual discharge time of the battery and the higher accuracy of MRE, select the relation between the time and voltage of the exponential function. Finally, in the model improvement, the turning point of the discharge curve is the segmentation point, and the discharge curve is fitted with the.
Removal of 1-hymxyethylidene-1, 1-diphosphonic Acid of Organic Phosphorus Scale Inhibitors in Circulating Water
Authors: Ji Ruijuan 
Published: August 2019

Abstract
In order to remove 1-hymxyethylidene-1, 1-diphosphonic acid (HEDP) of organic phosphorus scale inhibitors in circulating water effectively, a chemical precipitation method has been used. The influences of parameter on HEDP removing rate, such as species and dosege of chemical precipitation agent, reaction time, are studied, so that the optimal conditions are confirmed. The results show that the HEDP removing rate can be higher than 95% and the relative standard deviation of mesured value is less than 1%, when the mass concentration of FeSO4 is 2 g/L, the dosage of Ca (OH)2 is 0.052 g, and reaction time is 30 min. This method is simple and rapid, has high precision and good reproducibility, can be used to remove organic phosphorus by factory, with broad application prospect.
Polyvinyl Alcohol / Fulvic Acid Composite Adsorbent Gel Prepared by Microreactor
Authors: Zhang Lin , Leng Chunbo , Du Guofeng 
Published: August 2019

Abstract
Polyvinyl alcohol/fulvic acid (PVA/FA) composite hydrogel was synthesized in a microreactor using fulvic acid and polyvinyl alcohol as raw materials. The adsorption properties of the composite hydrogels for Pb2+ in water were investigated. The results show that the PVA/FA composite hydrogel is a three-dimensional porous network structure with uniform pore distribution and long-time water stability. When the mass fraction of fulvic acid was 1.5% and the freeze-thaw times were 3 times, the rate of saturated adsorption of PVA/FA composite hydrogels could be reaching to 72.3%.
Characteristics of an aerobic denitrifier isolated from unconfined aquifer
Authors: Zhu Xiaoming , Zhao Donghua , Pan Zarong , Zhang Wen , Ruan Xiaohong 
Published: August 2019

Abstract
An aerobic denitrifier strain named X11 was isolated from the shallow unconfined aquifer samples in Suzhou city, China. According to the physiological biochemical identification and the 16S rDNA gene analysis, the strain X11 was generally identified as Pseudomonadales Pseudomonadaceae. Single factor experiments were used to investigate the influence of temperature, pH and carbon sources on its growth and denitrification characteristics. The results showed that under aerobic conditions the total nitrogen loss and nitrate reduction efficiency within 60 hours were up to 70.3% and 95.1%, respectively, with initial nitrate concentration of 276.25 mg/L. The nitrate removal rates reached 18.24 mg/L·h within 12 hours. It was found that strain X11 can convert nitrate into nitrogen gas without obvious accumulation of nitrite under aerobic conditions. The pH increased and ORP decreased by activated denitrifier in liquid medium. the optimum conditions were obtained as follows; temperature value of 30° C, pH value of 7. The results indicate that the isolated aerobic denitrifier XK11 has high nitrogen removal efficiency, it may be a good candidate for in-situ bioremediation of nitrogen-contaminated shallow groundwater or aerobic wastewater treatment.
A Visible-Light Curing system of Diphenyliodonium Salt/BODIPY dyes/Bisphenol-A Epoxy Resin Under Halogen Lamp
Authors: Li Tao , Chen Yu , Liu Ran , Lu Ziyi , Wang Tao , Huang Xiping , Zhang Qi 
Published: August 2019

Abstract
Bisphenol-A epoxy resin have attracted much attention due to its good mechanical properties after curing. In this paper, a visible light curing system of bisphenol-A epoxy resin (E51) initiated by diphenyliodonium hexafluorophosphate (IOPF) and boron dipyrromethene-based (BODIPY) photosensitizers (BODIPY-1 and (BODIPY-2) under a halogen lamp (380-580 nm) was investigated. BODIPY dyes are well known long-wavelength photosensitizers, which is good for IOPF to expand absorption to visible light region. BODIPY-1 and BODIPY-2 are intermediates that reported in our previous work. When IOPF/BODIPY-1 is 2wt%/1wt%, E51 achieves epoxy conversion up to 60% in 0.18 mm thick molds. The Illumination of the halogen lamp is as low as 25.0 mW/cm2. Under same condition, the epoxy conversions of IOPF/BODIPY-2/E51 and IOPF/E51 are about 50% and 20%. When filters were used, IOPF/BODIPY/E51 was effectively cured under light irradiation of 460 nm and 540 nm, and only IOPF is not able to initiate E51 at these wavelengths.
Isolation and characterization of heterotrophic nitrifying bacteria and the removal of pollutants in black and malodorous water bodies
Authors: Zhang Wenjun , Wei Wei , Xing Yan , Zhao Yongzhi , Guo Xiaoying , Liu Mengyan , Cui Qi , Huang Junshe , Yao Xiaohan 
Published: August 2019

Abstract
Aiming at the problem of high concentration of COD and NH3-N in black and odorous water bodies, heterotrophic nitrifying bacteria which can remove ammonia nitrogen and organic pollutants were screened out in the laboratory simultaneously. A heterotrophic nitrifying functional group was constructed by using the strategy of bacterial source reorganization ecologically, and the removal effect of heterotrophic nitrifying functional bacteria on organic pollutants and ammonia nitrogen in water was studied. The results showed that the removal rate of ammonia nitrogen in the water was more than 52%, and the removal rate of COD was 57%∼86%. The effect of heterotrophic nitrifying functional bacteria group 1 on the removal of COD and ammonia in water was better, and the removal rate was 76.5% and 54.8%, respectively. The optimum inoculation test showed that the optimum inoculation amount of the heterotrophic nitrification bacteria group 1 was 10 ppm.
Urea solution of single droplet pyrolysis characteristics research and engineering application
Authors: Chen Hao , Xu Junfeng 
Published: August 2019

Abstract
The experimental bench for the pyrolysis characteristics of single droplets of urea solution was established to analyze the variation characteristics of the whole process of single droplet evaporation pyrolysis. The results show that there are a large number of bubbles in the droplets which are very favorable for pyrolysis, the pyrolysis energy and atomization degree are insufficient, leading to the formation of intermediate products, greatly reducing the efficiency of denitrification. Based on the experimental data, the urea pyrolysis system was developed and designed for the SCR denitrification project of a coal-fired boiler in a thermal power plant, and key equipment was optimized, including urea storage and supply system, denitration reactor system, spray gun device, pyrolysis furnace body, etc. The system was put into operation. After that, the NOx concentration was reduced from 250mg/Nm3 to 20 mg/Nm3, and the denitration efficiency reached over 90%. The project has strong engineering application value.
Bearing capacity evaluation of asphalt pavement based on dynamic deflection equivalent
Authors: Fan Qian , Li Shanqiang , Xu Xinquan 
Published: August 2019

Abstract
In order to accurately evaluate the bearing capacity of asphalt pavement structure, the research group, on the basis of real-time temperature data of five kinds of asphalt pavement structure in Daxin experimental road, obtain the dynamic modulus main curves of various types of pavement materials and FWD dynamic modulus of the load acting frequency through dynamic modulus research in laboratory, and determine the dynamic modulus of the pavement structure material true value. According to the principle of dynamic deflection equivalent, this paper puts forward the evaluation method of predicting the bearing capacity of asphalt pavement based on composite modulus determination, pavement structure inverse calculation and bending stiffness modulus attenuation threshold. The evaluation results of five kinds of asphalt pavement structure bearing capacity of experimental road are consistent with the actual performance, which shows that the evaluation method of bearing capacity of asphalt pavement structure based on dynamic deflection equivalent is reasonable and effective.
Status of Microbial Remediation Technology in Petroleum Contaminated Land
Authors: Xia Longfei 
Published: August 2019

Abstract
Leakage accidents occur frequently during the process of oil exploitation, storage and transportation. Effective management of the soil contaminated by it has become the focus of social attention. This paper introduces the oil pollution problem and physical, chemical and biological treatment methods. It focuses on the classification and application status of microbial remediation technology, and discusses the key factors that restrict bioremediation effects such as degrading microbial screening and colonization, and improving the bioavailability of petroleum hydrocarbons.
Effects of Cadmium Stress on Microbial Community Diversity in Soil Potted With Sasa Argenteastriatus
Authors: Yin Peng , Liu Xiaojie , Liao Jinhua , Hu Xia 
Published: August 2019

Abstract
In order to understand the remediation mechanism of cadmium-contaminated soils, pot experiments were conducted to study the effects of cadmium stress on soil microbial biomass and soil microbial diversity in Sasa argenteastriatus plantations. The results showed that Cd stress significantly changed the characteristics of soil microbial biomass carbon content, and the level of soil microbial biomass carbon was higher than that of the control when under 0.5mg/kg Cd stress. Heavy metals significantly inhibited soil microbial biomass carbon at higher concentrations of cadmium ( > 5 mg/kg). Cadmium pollution significantly changed the structure of bacterial communities and promoted the growth and development of some tolerant bacterial species (hongkongensis and ovatus) at a low level of cadmium stress of 0.5mg/kg. High concentrations of cadmium caused stress that significantly inhibited the growth of Baclicus thermoamylovorans and Baclicus foraminis. These preliminary results reveal the response of soil microbial community structure to heavy metal pollution, and provide a theoretical reference for early warnings of trends in soil quality changes.
Preparation of Phosphorus and Oxygen Co-Doped With Graphite Carbon Nitride and Its Application in Photodegradation of Methylene Blue
Authors: Hu Fengping , Luo Wendong , Peng Xiaoming , Hu Yuying , Dai Hongling 
Published: August 2019

Abstract
In this study, phosphorus and oxygen co-doped graphite carbon nitride has been successfully prepared by simple thermal copolymerization. The as-prepared materials were characterized by SEM, XRD, XPS and UV-vis-DRS. The results showed that phosphorus and oxygen were successfully doped on the structure of graphite carbon nitride. Photocatalytic degradation of MB in solution by the catalyst has been studied, POCN-1 has the best photocatalytic activity among of the as prepared materials, photocatalytic degradation rate of MB is 10.6 times higher than that of g-C3N4. The main reason for its enhanced photocatalytic performance is that the co-doped of phosphorus and oxygen elements would change the electronic structure of g-C3N4, reduce the forbidden band width of the photocatalyst. At the same time, can extend the absorption boundary of visible light.
Effects upon Olive and Changes of its Physiological Status under the Compound Stresses of Ferrum and Zinc
Authors: Yang Weifei , Liang Jian , Liu Xie 
Published: August 2019

Abstract
Based on the high value of olive oil, this experiment was carried out in order to study its growth under heavy metal stress. In the experiment, Fe and Zn were used as heavy metal stress factors. Effects of Fe-Zn combined stress on physiological indexes of malondialdehyde (MDA), soluble sugar, SOD, POD, CAT and soluble protein in olive leaves. The results of the last experiment showed that with the increase of Fe2+ and Zn2+ concentration, the activity of POD and CAT showed a trend of increasing first and then decreasing, and the activity of SOD enzyme was always decreased. Malondialdehyde (MDA), soluble sugar content and accommodating protein the content is gradually increasing.
Strategy 3M plus to reduce incidence disease dengue haemorrhagic fever in Public Health Centre (PHC) Tigo Baleh Bukittinggi West Sumatra-Indonesia
Authors: Alhamda S , Barlian E 
Published: August 2019

Abstract
Disease of Dengue Haemorrhagic Fever (DHF)) is contagion which because of virus dengue and contagious through larva mosquito of Aedes aegypti. This disease can attack everybody and death. In Bukittinggi represent non-area of endemic DHF, but almost every year the progress of occurrence DHF, District which at most case of DHF is Aur Birugo Tigo Baleh (ABTB), besides wide of smallest area also there is environmental factor which related case of DHF. This Research aim to know related of existence larva mosquitoes Aedes aegypti and Implementation of 3M Plus with improvement incidence disease Dengue Haemorrhagic Fever in PHC Tigo Baleh Bukittinggi. Research method is analytic survey with study design of case control use test of chi square. Research location in District of ABTB, its research responder is 78 with technique of totally sampling. The research show existence snap fingers at house snapping fingers at and suffering DHF 61,5%, do not snap fingers at and suffer DHF 38,5%. Value of House Index (HI) 43,6%, Container Index (CI) 17,9%. Implementation of 3M Plus unfavorable and suffer DHF 69,2%, while implementation of 3M Plus good and suffer DHF 30,8%. From result of research pvalue=0,003 (p<0,05), there are relation existence larva mosquitoes Aedes aegypti with Improvement incidence disease Dengue Haemorrhagic Fever and pvalue=0,040 (p<0,05), there are relation of 3M Plus with Improvement incidence disease Dengue Haemorrhagic Fever. Suggested, Public Health Service in Bukittinggi and PHC Tigo Baleh conduct socialization and enableness of society to join in to conduct eradication of mosquito Aedes aegypti regularly so that can degrade number incidence of disease DHF.
Pollution load capacity of Batang Kuranji River, Padang City
Authors: Azhar A , Barlian E , Dewata I , Amran A , Teguh A , Danhas Y 
Published: August 2019

Abstract
This study aimed to determine the pollution load capacity (DTBP) of Batang Kuranji River against the parameters of Total Suspended Solid (TSS), Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD). In general, pollutant sources are caused by developments and activities of urban communities such as domestic activities, industry, agriculture and other activities. This research is descriptive quantitative by using Qual2KW method with the sampling location point on the representative of land use located along the kuranji stem river as many as 24 sampling locations, which are divided into 24 segments, spatially from upstream to downstream. The results showed that the parameters of Total Suspended Solid (TSS) were seen from upstream to downstream in the area of sections 8, 10, 14 must be reduced pollution load of 648 kg / day (section 8), 15,552 Kg / day (section 10) and 22,032 Kg / day (section 14), this is due to (1) economic activities of the community in the agricultural sector, in the form of rice fields directly adjacent to the Batang Kuranji river which can cause erosion, (2) livestock sector activities in the form of chicken farming, where the community directly discarding the remnants of chicken feed is discharged directly into the river so that it can increase the pollution load of TSS parameters. Parameters of BOD in Section 6 and Section 16 must be reduced by a pollution load of 453.60 Kg / day (Section 6), 1,308.96 Kg / day (Section 16), This is due to this high pollutant source such as: (1) domestic / domestic waste activities, (2) rice field agriculture. Whereas the COD parameters in areas 3, 7, 14, 15, and 16 must be reduced by 3,862 kg / day (section 3), 16, 783.20 kg / day (section 7), 3,149.28 Kg / day (segment 14), 9,629.28 Kg / day (section 15) and 22,589.28 Kg / day (section 16), this is because there are still many agricultural, plantation and livestock areas so that many sources of pollutants enter the Batang Kuranji river from chemicals organic so that the river water in Batang Kuranji can still accept pollution loads, for the COD parameter the approach is more inorganic chemistry and there are many inorganic chemical compounds in the disposal of liquid waste in the Company / Industry. With the quality conditions of the current Batang Kuranji River in the Padang City segment, control efforts are needed for the pollution. Related to the results of the study, and from the conclusions obtained, the efforts made for optimal control are the application of environmentally sound spatial principles.