bluuebunny/crossref_metadata_2025_split huggingface dataset:
An Operation Time On-line Setting Method of Distance Protection Section II & III for 220kV Transmission Line
Authors: Wang Shuyang , Qi Xuanwei , Li Tianhua , Wang Song , Wang Xingguo , Guo Yarong 
Published: December 2020

Abstract
Section II and section III of distance protection are widely used as backup protection for 220kV transmission line. In order to ensure that the line distance protection can act correctly and cooperate with each other, it is necessary to set the impedance and time setting value of distance protection. At present, the time setting values of section II and III of power grid distance protection are fixed action time limits calculated by manual calculation or computer setting calculation program offline. In this paper, an on-line setting technology for section II and section III of distance protection is proposed. The operation time of section II and section III of distance protection is determined by measured fault impedance. As long as the distance protection section II and section III operates, the operation time can be calculated according to the formula proposed in this paper, and the operation time of protection section II and section III of the upper and lower level lines can meet the coordination relationship, and the operation time difference meets the requirements. Through modeling and simulation, it is proved that the method proposed in this paper is feasible.
Research on capacity configuration optimization for island microgrid with PV-wind-diesel-battery and seawater desalination load
Authors: Fu Yu , Tang Junci , Cui Jia , Yang Junyou , Cheng Shanshan 
Published: December 2020

Abstract
According to the situation of abundant renewable energy but insufficient fresh water on the island, using seawater desalination equipment as a time-shifting load can better absorb the output of renewable energy and eliminate the surplus electric energy. In this paper, the optimal configuration of wind solar diesel storage island microgrid capacity considering the time-shifting load of seawater desalination equipment is studied. The optimal allocation model of island microgrid capacity with wind solar diesel storage and seawater desalination load is established. The optimal objective function of capacity allocation is the system equivalent annual investment cost. The results show that considering the time-varying load of seawater desalination equipment, the optimal configuration strategy of wind solar diesel storage island microgrid capacity can improve the consumption of renewable energy, reduce the waste of capacity, solve the problem of island freshwater shortage to a certain extent, and improve the economic and environmental benefits of the island.
Electricity market dynamics: The influence of fuel prices and the spillover effect
Authors: Ding Weibin , Xu Yang , Gao Feng , Wu Binjie , Fu Yue 
Published: December 2020

Abstract
Fossil energy power generation still plays a key role in the power generation industry, especially for countries where thermal power generation still dominates. With such potential considerable impact, this article aims to analyze the drivers of peak and valley electricity prices from the perspective of thermal power fuel. Specifically, the study uses data from the highly market-oriented US PJM power market to conduct an empirical analysis and focused on the links with coal, crude oil, and natural gas. Applying the Barunik and Krehlik index method to measure the spillover effect, we find that there is an obvious two-way spillover effect between the thermal power fuels and the electricity market. Besides, such an effect mainly occurs in the short time horizon, and natural gas plays a key role in transmitting the information to electricity prices. At last, this paper further builds a connectedness network based on the results of the pairwise spillovers, thereby visually displaying the cross-market connections.
State of charge estimation of lithium-ion battery based on double deep Q network and extended Kalman filter
Authors: You Guodong , Wang Xue , Fang Chengxin , Zhang Shang , Hou Xiaoxin 
Published: December 2020

Abstract
The state of charge (SOC), as an important parameter of the lithium-ion battery management system (BMS), is an important factor affecting the current battery detection and safety issues. Due to the non-linear characteristics of the lithium-ion battery charging and discharging process, it is difficult to model the BMS and estimate the SOC accurately. This paper takes lithium-ion battery as the research object, designs the Markov decision process (MDP) model of lithium-ion battery energy storage prediction, establishes the second-order RC equivalent circuit model (ECM) and extended Kalman filter (EKF), and proposes a method based on double deep Q network (double DQN) to optimize the EKF parameters SOC estimation method to solve the problem of dimensionality disaster and value function overestimation generated in deep reinforcement learning (DRL). Through the effective verification of the lithium-ion battery SOC estimation algorithm, the simulation results show that compared with the traditional deep Q network (DQN) algorithm, double DQN has better convergence, adaptive ability and better estimation accuracy. It can provide new ideas for the accurate estimation of SOC.
Research on the Development of pure electric vehicle power battery Technology based on patent analysis
Authors: Yuan Xinyue , Wu Jie 
Published: December 2020

Abstract
Power battery is the key to the widespread use of pure electric vehicles. In this paper, patent mining and data analysis technology are adopted to summarize the development trend and main patentee of battery electric vehicle power battery patent technology. Combined with the patent text, the key technologies in the field of battery electric vehicle power battery in recent years are analyzed in depth. The research results show that China has entered a period of rapid technological development in the field of battery electric vehicle power battery, and its innovation subjects are mainly enterprises. The key technologies mainly focus on three aspects: battery heating, battery cooling and charging methods.
A demand-side integrated flexible load regulation optimization strategy for clean energy consumption
Authors: Yu Fu , Feng Jiang , Jia Cui , Yang Jun You , Yan Xinyue , Jin Yonghui , Liu Yunfei 
Published: December 2020

Abstract
In order to absorb large-scale clean energy for power grid, the use of energy storage technology is paid more and more attention. However, most of the current researches are focused on a single kind of energy storage forms, and few are involved in the joint use of multiple energy storage devices. This paper aims at the insufficient application of a single energy storage device and the conflict between multiple energy storage technologies. A demand-side integrated flexible load regulation optimization method is proposed. For the heat storage electric boiler system and the ice storage air conditioning system, the combined algorithm is used to optimize their operation. It is clear that the combined algorithm based on genetic algorithm combined with cold, hot and electrical system has a more significant effect of absorbing clean energy than the single energy storage system. And, the example result proves the correctness and feasibility of the proposed comprehensive demand side response strategy.
Screening of silage maize cultivars for their agronomic traits in Hohhot of China
Authors: Li Juan , Wang Yufen , Bai Lanfang , Wang Yanan , Sun Hongjun , Jia Kai 
Published: December 2020

Abstract
The study was conducted to determine yield and agronomic traits of some silage corn varieties in Hohhot of Inner Mongolia Autonomous Region, China, in order to screen several suitable varieties grown as the main forage in Hohhot. The study was established to randomized complete block design pattern with three replications in irrigating conditions. In this research, agronomic traits including growing stages, days from emergence to silage harvest, plant height (cm), ear height, stalk diameter, number of green leaves, lodging rate, empty stalk rate, double strike rate, forage yield, and forage nutritive traits including crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), were determined in 34 silage corn varieties. The results showed that most of the varieties showed obvious difference among the growing stages, especially after tasseling stage. The forage yield range was from 31.21 to 80.53 T Ha-1. Among all the tested varieties, a total number of 17 (ranking from 1 to 17) varieties of forage production were higher than 50 T/Ha._Combined with agronomic and forage nutritive data obtained from the study, we finally selected 5 varieties (Jilong 369, Xianyu 1580, Xianyu 1692, Jinai 130, 32D22) as the suitable varieties to promote planting in Hohhot.
Effects of Plant Growth Regulators on Fruit Set and Yield of Taiwan Morus macroura
Authors: Ren Jiequn , Zhang Minghai , Chen Li , Li Zhinian , Zheng Zhangyun 
Published: December 2020

Abstract
In recent years, it is a common phenomenon that Taiwan Morus macroura has low fruit set in different mulberry planting areas that occurred popularly in China. This study aims to study the effects of plant growth regulators on fruit set and quality of Taiwan Morus macroura. Field experiments were carried out to investigate ten plant growth regulators, treated with 3 concentration gradients. The result shows that six plant growth regulators had better fruit preservation effect, the yield of mulberry which treated with plant growth regulators were significantly higher than that of control groups. To reserve fruit in fruit mulberry production, 85% 2,4-DNa SP with 400000~600000 dilution, 99.9% Boron fertilizer SL with 1500~2500 dilution, Amino acid soluble fertilizer SP with 35000 dilution, 80% DA-6 SL with 50000 dilution, 0.03% NAA SL with 50000 dilution and 8% Chlorophenoxyacetic acid sodium salt SP with 3000~6000 dilution are the best from the standpoint of food safety and economics.
Purification of letinous edodes polysaccharide and its effect on gel properties of rice starch
Authors: Sun Meiling , Feng Xiaoguang , Chen Liye , Hua Wanyue , Chen Xiangning 
Published: December 2020

Abstract
In this study, lentinan was extracted and purified, and its components were analyzed. The purified letinous edodes polysaccharides were co pasting with rice starch with different contents (1.0%, 3.0%, 5.0%) respectively. The effects of letinous edodes polysaccharides on the gel properties (transparency, solubility, swelling power, freeze-thaw stability, coagulability and in vitro digestibility) of rice starch were studied. The results showed that after purification, the total sugar content of lentinan reached 55%, protein content was about 8%, ash content was very little, and uronic acid content was as high as 19%. With the increase of lentinan content, the transparency, swelling power and solubility of rice starch decreased significantly, and the freeze-thaw stability and sedimentation was improved, and the swelling power and transparency were directly proportional to temperature. At the same time, lentinan can inhibit the hydrolysis and aging of rice starch to a certain extent, and improve its anti digestion ability.
Preparation of antimicrobial peptides from Bacillus subtilis and effect on fresh-cut vegetables
Authors: Zhou Miao , Chang Xiguang , Feng Xiaoguang , Ren Yi , Chen Chichang , Chen Xiangning 
Published: December 2020

Abstract
In order to extend the shelf life of fresh-cut vegetables, the principle of preservation of Bacillus subtilis antimicrobial peptides was discussed. Fresh potatoes, yam and lotus root were used as test materials, and the prepared Bacillus subtilis antimicrobial peptides were used for soaking treatment, soaked in clean water as a control, and stored at 4°C. The sensory quality changes during storage were analyzed and their physiological and biochemical indexes were determined. The results show: compared with the control group, the group treated with Bacillus subtilis antimicrobial peptides had the best sensory quality during storage, significantly inhibited the increase in electrical conductivity, reduced cell membrane damage, and had significant POD and PPO enzyme activities (P < 0.05). The reduction effectively inhibits the proliferation of microorganisms during the storage of fresh-cut vegetables, thereby better maintaining the quality of fresh-cut vegetables and effectively extending their shelf life.
Effects of Different Proportions of Pig Manures and Sugarcane Leaves on Cu and Zn Forms in Dry Fermentation
Authors: Du Jihua , Jiao Jing , Huang Xiaohong , Li Zunxiang , Liu Xin Peng 
Published: December 2020

Abstract
To explore the influence of different proportions of pig manures and sugarcane leaves on Cu and Zn in pig manures, pig manures and sugarcane leaves were used as raw materials to determine the changes of Cu and Zn effectiveness in pig manures under different proportions of pig manures and sugarcane leaves. The results show that under different proportions of pig manures and sugarcane leaves, (1)when the proportion of sugarcane leaves and pig manures was 2:1, it was adverse against the bio-availability of Cu. When the proportion was 1:2, bio-availability form (EX and RED) of Cu decreased significantly. (2) The bio-effective form content is ranked as below in Zn: C (1:2) >B (2:1). When the proportion of sugarcane leaves and pig manures was 1:2, bio-availability form (EX and RED) of Zn was the minimum, only 22.72%, and the passivation effect was good.
Advances in the study of chromogenic agents in meat products
Authors: Zhao Fushi , Chen Xiangning 
Published: December 2020

Abstract
In order to improve the organoleptic properties, edible quality and flavor of meat products, and extend its shelf life, some additives are commonly used to guarantee the color retention of meat products. Nitrate and sodium nitrite are frequently-used chromogenic reagents, but it has been proven that their usage has potential safety risks. Excessive consumption of them can cause carcinogenesis, teratogenesis, and mutation. Therefore, the search for other effective alternatives is imminent, which has become a research hotspot at home and abroad. This paper expounds the problems in the processing of meat products and the mechanism of chromogenic reagents. The effect of chromogenic reagents on the preservation of meat products is also discussed, which provides a reference for further research on meat chromogenic reagents.
Isolation and identification of Morchella pathogenic bacteria and determination of antibacterial activity of 22 essential oils
Authors: Zhang Yongcang , Lu Qiyu , Wang Youmin , Tu Caihong , Liu Lan , Xie Yongdong , Liu Ji 
Published: December 2020

Abstract
To extend the storage period and shelf life of Morchella and reduce environmental pollution problems, in this experiment, pathogenic fungi were isolated and identified from the naturally-occurring Morchella, and the antibacterial activity of 22 kinds of plant essential oils was determined by the plate dilution antibacterial method. The results showed that a strong pathogenic fungus strain YDJ-P was isolated and identified from the naturally-occurring Morchella, and it was identified as Rhizopus stolonifer based on morphology and molecular biology. The antibacterial activity of 22 essential oils showed that the essential oils of Clove, Styrax and Spearmint had obvious inhibitory effect on the strain YDJ-P, and the inhibitory rate was 100 % at a concentration of 1000 μl/L. The bacteriostatic rate of Patchouli, Inula, Oregano, Neroli and Myrrh essential oils against strain YDJ-P were significantly different from that of completely bacteriostatic essential oils (P < 0.01), all >50%.
Research on the Regulatory Mechanism of Trehalose in Mentha Citrata’s Resistance to Drought
Authors: Feng Yingying , Cai Lujuan 
Published: December 2020

Abstract
Simulation of drought stress by 10% polyethylene glycol (PEG-6000) is conducted to measure the indicators of photosynthetic and chlorophyll fluorescence shown by Mentha citrata seedling foliage at different times and in different conditions. The result suggests that drought stress harms the growth of such seedlings, causing a drastic decline in their photosynthesis and pigment content; exogenous trehalose is effective to mitigate the drought-induced decrease in their Pn, maintain the stability of Gs and Tr, and meanwhile reduce the content of Ci; such trehalose can mitigate the drought-induced decrease in Fm, Fv/Fm, Fv/Fo, qP and Y(II) to a certain extent, slow the decrease in Fo, and restore Y(NPQ) to its normal range. Overall, exogenous spraying of trehalose can alleviate the damage that drought stress inflicts on the photosynthesis of Mentha citrata seedlings, maintain a stable photosystem, and enhance such mint’s resistance to drought to some extent.
Efficacy of Butylphthalide Soft Capsules Combined with Shuxuetong Injection in the Treatment of Acute Cerebral Infarction
Authors: Zhang Wentao , Zuo Ping , Wang Feng , Cui Yinglin 
Published: December 2020

Abstract

Objective: To study the clinical effect of butylphthalide soft capsule combined with Shuxuetong injection in the treatment of acute cerebral infarction. Methods: A total of 94 patients with acute cerebral infarction admitted in our hospital from March 2018 to February 2020 were selected and divided into two groups according to the random number table method. The patients in both groups received conventional treatment programs, the control group (n=47) was given Shuxuetong injection, the test group (n=47) was given combination therapy of butylphthalide soft capsules and Shuxuetong injection on the basis of conventional treatment, and compared the efficacy and related indicators of patients in the two groups.

Results: The total effective rate of treatment in the test group was 95.74%, which was significantly higher than that in the control group, which was 80.85%; the NIHSS score in the test group was lower than that in the control group, and the ADL score was higher than that in the control group; the complication rate in the test group was 14.89%, which was significantly lower than the control group’s 40.43%, the difference between the two groups of data is statistically significant (P < 0.05).

Conclusion: For patients with acute cerebral infarction, the use of butylphthalide soft capsules combined with Shuxuetong injection can achieve the desired results, and it has a positive effect on the recovery of nerve function and self-care ability, and it can also reduce the risk of complications. It is a treatment plan that is worth promoting.
Advance on the preparation technology and anti-hyperlipidemia mechanism of phytosterols
Authors: Deng Chuanhan 
Published: December 2020

AbstractPhytosterols is a kind of natural active substance, which has many physiological functions that beneficial to human body. It can be used as pharmaceutical raw materials and functional food supplements. In recent years, phytosterols have been extensively studied in the prevention of cardiovascular diseases, and a series of research results have been reported. This paper combined the literature recent decades, and introduced the source and distribution, structures and properties of phytosterol, focusing on the preparation technology of phytosterol, including solvent extraction, esterification, distillation, supercritical CO2 extraction, saponification method and microorganism fermentation, and the mechanism of blood lipid lowering function of phytosterols were discussed and summarized. The future research direction was prospected in order to provide the reference for the development and utilization of phytosterols.
Investigation of the impact on the antioxidant capacity and Flavonoids components of different drying methods for Sophora japonica L.
Authors: Wang Yandong , Wang Jiaming , Wang Yingli , Zhang Zemin 
Published: December 2020

Abstract
To develop the optimal drying method for the processing of Sophora japonica L., three approaches including freeze-drying, air-drying and oven drying were investigated. The water contents in dried Sophora flower samples treated using different drying methods were compared. The total amounts of Flavonoids in methanol extracts of dried Sophora flower were measured using UV-vis spectrophotometer, and the amounts of Rutin were measured using High Performance Liquid Chromatography (HPLC). The antioxidant capacity of extract of oven dried Sophora flower was determined by three different antioxidant assays, including measurement of clearance ability for DPPH, clearance ability for free hydroxyl radical and Ferric reducing antioxidant power (FRAP) assay. In our research, freeze-drying method demonstrated a minimal impact on the morphology, color, smell and other features of Sophora flower, and the freeze-dried Sophora flower reserved the highest value of total Flavonoids component amount. However, Sophora flower dried in the oven had the lowest water content and highest Rutin amount. In addition, oven dried Sophora flower could be stored easily and had less loss of the active components. Sophora flower has been demonstrated to be antioxidant in chemical reactions. In the measurement of clearance ability of DPPH, the clearance activity was positively correlated to Sophora flower extract concentration. In terms of clearance ability for free hydroxyl radical, the antioxidant capacity of Sophora flower extract increased with the increase of its concentration in the low concentration range, while after exceeding a certain concentration, clearance activity reduced with the increase of concentration. In FRAP assay, the total antioxidant capacity of Sophora flower extract first decreased as concentration increased when concentration was below 0.2 mg/mL, but then increased with the concentration after exceeding 0.2 mg/mL. In conclusion, oven drying method could be applied in the processing of Sophora flower. Sophora flower possesses good antioxidant capacity and this could be the theoretical basis for using it in the production of health products.
Comparison of weak signal detection performance between chaotic system and FFT
Authors: Wang Yan-Wu , Shi Min , Qian Chao 
Published: December 2020

Abstract
Chaotic system can be used to detect weak signal in strong noise background, but is the detection performance of chaotic system prior to the detection performance of FFT? The signals under the same noise power and the same signal-to-noise ratio are detected by FFT and chaotic detection system, and the detection rate is compared by introducing the concept of detection rate of chaotic system. The results of analysis show that the detection performance of FFT is only related to the signal-to-noise ratio (SNR) with the same signal length and noise power. And the signal can be detected accurately when the SNR is -40dB, but it can’t be detected when the SNR is -60dB and -80dB. The signal can be detected sometimes, sometimes can’t be detected by the chaotic system in the same condition. Therefore, the detection probability of weak signal exists when the weak signal detected by chaotic oscillator.