bluuebunny/crossref_metadata_2025_split huggingface dataset:
The influence of quarted card and virtual laboratory media on students’ critical thinking ability
Authors: Muliawati Dian Iga , Norra Bunga Ihda 
Published: March 2021

Abstract
Excretory System Material requires interesting and effective media in learning to obtain maximum cognitive abilities. The purpose of this research is to determine the effect of the quartet card and virtual laboratory media on students’ critical thinking ability. This research is quantitative research with an experimental method using a non-parametric analysis Sign test. The research design used was the Nonequivalent Control Group Design with a purposive sampling technique. The instrument used was 18 questions pretest and posttest. The results obtained from the average value of the pretest and posttest of the highest critical thinking ability were obtained by the class with the media using the quartet card 24.038, then the class using the virtual laboratory media was 21.043, and the lowest average score was the control class 18.05. Thus, it can be concluded that there is a positive effect of learning with the quartet card and virtual laboratory media on students’ critical thinking ability in the excretory system material.
Linear and non-linear refractive indices in curved space
Authors: Hadi Miftachul , Deta Utama Alan , Husein Andri Sofyan 
Published: March 2021

Abstract
The refractive index and curved space relation is formulated using the Riemann-Christoffel curvature tensor. As a consequence of the fourth rank tensor of the Riemann-Christoffel curvature tensor, we found that the refractive index should be a second rank tensor. The second rank tensor of the refractive index describes a linear optics. It implies naturally that the Riemann-Christoffel curvature tensor is related to the linear optics. In case of a non-linear optics, the refractive index is a sixth rank tensor, if susceptibility is a fourth rank tensor.
Evaluation of several cumulus parameterization schemes for daily rainfall predictions over Palembang City
Authors: Satya O C , Arsali  , Kaban H , Irfan M , Rahmasari K , Monica C , Sari D R , Alensi N , Mandahiling P M 
Published: March 2021

Abstract
The daily rainfall prediction calculated from four Cumulus schemes i.e.: Kain-Fritsch (KF), New Tiedtke (NT), Grell 3D ensemble (G3D), and Betts-Miller-Janjic (BMJ) had been tested for compliance with daily observation data for 90 days (1 Dec 2018 to 28 Feb 2019) from three observer stations in Palembang city: BMKG-Kenten (Kenten), BMKG-SMB2 (SMB2) and Unsri Bukit Besar (UBB). The test results show that the BMJ cumulus scheme provides better suitability for 19 out of 45 unique indicators for rainfall event indicator (REI) groups and for as many as 13 out of 27 unique indicators for rainfall intensity indicator (RII) groups. The four schemes are able to provide the good performance for each on different indicators and stations, however, in general the BMJ scheme gives the best performance in predicting daily rainfall over Palembang city.
Existence and uniqueness of the boussinesq equations for MHD convection
Authors: Tafrikan M , Ghani M 
Published: March 2021

Abstract
This paper is concerned with the Boussinesq-MHD system with constant viscosity, thermal diffusivity, and electrical conductivity. The existence of this Boussinesq-MHD system was estimated by Littlewood-Paley decomposition, Bony’s para product and commutator estimates. Meanwhile, the uniqueness was estimated by Gronwall inequality. In this paper, the space is the optimal Sobolev spaces for the Boussinesq-MHD system.
Investigation of oral malodor prevention by dentifrices as measured by VSC reduction
Authors: Zsiska Marianne , Schneiderman Eva , Jin Yingkun , Farrell Svetlana , Grender Julie 
Published: March 2021

Abstract
The oral malodor reduction efficacy of dentifrices containing stannous fluoride (SnF2) or zinc plus arginine (Zn/Arg) was evaluated using a halimeter to measure volatile sulfur compounds (VSCs) in two randomized, controlled, single-blind, cross-over pilot clinical trials. Study 1 (N = 16) had five 1100 ppm F dentifrices and five treatment periods: negative control (NC): 0.243% sodium fluoride (NaF); SnF2 A: 0.454% SnF2 + pyrophosphate; SnF2 B: 0.454% SnF2 + sodium hexametaphosphate; SnF2 C: 0.454% SnF2 + citrate; and SnF2 D: experimental 0.454% SnF2 with increased bioavailable Sn. Study 2 (N = 16) had four 1450 ppm F dentifrices and four treatment periods: NC: 0.1% NaF + 0.76% sodium monofluorophosphate; Zn/Arg: NaF + zinc + arginine; SnF2 E: 0.454% SnF2 + 0.078% NaF + sodium hexametaphosphate; SnF2 F: 0.454% SnF2 + 0.078% NaF + citrate. Each period took 96 h; baseline (day 0) morning to day 4 morning. Subjects brushed 2x/day with the treatment dentifrice. VSC levels were measured in the morning, prior to morning brushing, on days 0 and 4. Changes in VSC scores from day 0 to day 4 were assessed using a mixed-model analysis of covariance for cross-over studies. In study 1, SnF2 dentifrices B, C and D showed statistically significant reductions (31.3%, 24.8%, 34%, respectively) in VSC scores versus baseline (p < 0.001); the benefits of these treatments versus NC and SnF2 dentifrice A were statistically significant (p ⩽ 0.001). In study 2, SnF2 dentifrices E and F showed statistically significant reductions (31.2%, 22.1%, respectively) in VSC scores versus baseline (p ⩽ 0.010); the benefits of these treatments versus NC and the Zn/Arg dentifrice were statistically significant (p ⩽ 0.035). The Zn/Arg dentifrice showed a significant increase of 35.2% (p < 0.001) in VSC scores versus baseline. These studies demonstrated that SnF2 dentifrices can provide significant oral malodor reductions, but the benefit is formulation dependent. The presence of SnF2 is not sufficient to ensure efficacy. The Zn/Arg dentifrice increased VSC levels, indicating greater malodor.

Clinical Trial Numbers: 20190429 and 20191028
Research on Anti-Interference Screening of On-line Measurement of Battery Ageing under Smart Grid Big Data
Authors: Fan Xinxin , Yan Hongmei 
Published: March 2021

Abstract
By analyzing the traditional operation and maintenance mode of substation batteries, the paper proposes a new remote online maintenance and management system for batteries based on smart grids, which changes the traditional maintenance method of using discharge load meters to check offline battery discharge packs. Single battery online voltage inspection, internal resistance test, and dynamic equalization, as well as battery pack remote online verification discharge and equalization charging, real-time monitoring of battery aging, promote intelligent, efficient, and unmanned maintenance battery status in substations, Provide strong technical and program guarantees.
Numerical study on hydraulic characteristics of improved X-shaped FGP
Authors: Xue Yang , Xu Lingjun , Wang CaiPin 
Published: March 2021

Abstract
The three dimensional numerical simulation was carried out for flood discharge and energy dissipation process of five improved X-shaped FGPs in hydropower project by using coupled Level set and VOF model and RNG k-ε turbulent model. The change laws of flow pattern, water surface profile and velocity distribution of X-shaped FGP and lock chamber were gained. The results of numerical simulation were compared with the model test data and good agreement was found. It validated the numerical simulation method is reliable, It can provide strong references for the design of energy dissipation and shape optimization of practical project, the results from computation can be supplement for experiment.
Research on Multiple Demand Response in Integrated Energy System Containing Power, Gas and Heat
Authors: Zhang Pan , Zhu Haidong , Zhao Jing , Zhang Tingyu , Huang Baole 
Published: March 2021

Abstract
Integrated demand response provides an important direction for realizing the bidirectional-interaction between supply and demand in the integrated energy system. In view of the differences in the time, space, cost and other aspects of users’ demand for multi-energy, a integrated demand response method based on the energy pricing strategy of the integrated energy system is proposed. Firstly, the characteristics of integrated demand response resources are analyzed, and various integrated demand response models are established. Secondly, based on the nodal energy price, considering the energy response potential, and taking the user energy cost as the optimization goal, an energy cost model that takes into account the load change of the user’s integrated demand response is established. Finally, an example is used to analyze the multi-energy load response under the integrated energy system nodal energy price strategy, which is beneficial to promote the rational use of energy by multi-energy users and reduce energy costs.
Construction Crane Detection under Transmission Line Based on Improved Vibe Algorithm
Authors: Li Xinwen , Lu Li 
Published: March 2021

Abstract
In this paper, the moving object detection part of crane’s illegal construction detection under transmission line is studied, and two scenes are simulated. The Visual background extraction (Vibe) algorithm is selected as the moving object detection algorithm used in this paper. For the problems of the algorithm, including ghost phenomenon in detection results and the the presence of falsely detected foreground points under dynamic background, the Vibe algorithm is improved by the reconstructed background model, dynamic radius threshold and connected domain analysis. Results of the experiment show that ghost area in the detection results of the improved Vibe algorithm can quickly disappear, and the number of falsely detected foreground points is significantly reduced. Compared with the original Vibe algorithm, the average value of the comprehensive evaluation index F1 is increased by 5.8%, and the detection effect of moving object is significantly improved.
Design of Photoelectric Amplification Circuit for Laser Fuze
Authors: Zhang Yulong , Guo Yachao , He Guanglin 
Published: March 2021

Abstract
A photodetection system based on the PIN photodetector was proposed in order to amplify the weak narrow pulse echo signals received in the laser fuze without distortion. The circuit model of this photodetection system includes a preamplifier circuit, a main amplifier circuit. Computer simulations were carried out in the MULTISIM and TINA environment, and the gain of the photoelectric amplification circuit was 119.9dB and the bandwidth was 89.46MHz. The simulation results show that the optoelectronic receiving system realizes the low-noise and high-gain broadband application, which meets the designed requirements.
Application Research of Customer Side Integrated Energy Service System Based on Machine Learning
Authors: Luo Yizhao , Zhan Chao , Liu YuLuan , Yu Huang , Li Ronggui 
Published: March 2021

Abstract
With the emergence of Internet, big data, cloud computing, block chain technology and other high-tech technologies, the integrated energy service mode including more clean energy and micro grid technology has quietly begun. This paper defines the connotation and value of integrated energy services, and constructs the theoretical framework of comprehensive energy services evaluation system based on the traditional balanced scorecard. This paper analyzes the current situation of domestic and foreign energy markets and the scope of comprehensive services. Finally, the difficulties and challenges faced by the energy integrated service industry are analyzed, and the after tax internal rate of return is 11.2%, which provides a reference for the transformation of energy enterprises.
Dual Microcomputer Excitation Regulator Data Follow and Fault Switching
Authors: Zhang Zhentao , Yu Meizhen , Wen Zhang , Zhang Lei 
Published: March 2021

Abstract
In this paper, the generator excitation regulator as the control object, studies the data tracking between the dual microcomputer excitation control system and bumpless transfer, in order to ensure the system real-time data tracking, the accuracy of fault detection and quick failover, especially the design of the control system of a redundant hot standby based on double DSP, through the eCAN communication network data through the eCAN network to follow, mailbox function complete dual data tracking, the proper use of the DSP interrupt service subroutine for fault identification, finally using DSP rich software functions of fault alarm and switching. The experimental test of generator excitation regulator of above ideas developed data follow and fault based switching system, operation results show that: the typical faults in the excitation conditions, system data real-time, accurate tracking, disturbance of high fault free switching, system reliability and maintainability improve.
Study on the comprehensive benefit evaluation model of energy storage for the development of clean energy city
Authors: Wang Xiao , Chen Gang , Wang Baolin , Sun Yan 
Published: March 2021

Abstract
The establishment of clean energy based power supply mode is an important direction of urban energy development in China. The realization of clean energy structure depends on large-scale energy storage technology, so reasonable evaluation of energy storage construction for the development of clean energy city has important practical significance. Under this background, this paper designs the comprehensive benefit index evaluation system of energy storage considering three dimensions of social benefit, economic benefit and environmental benefit; Secondly, TOPSIS evaluation method based on entropy weight method is used to build a comprehensive evaluation model of energy storage for clean energy city development; At last, Taking Urumqi City as an example, the validity of the model is verified.
Research on Urban Clean Energy System Evolution Model Based on Grey Theory
Authors: Lu Yingwei , Gu Ming , Bai Xiaolei , Wei Geran 
Published: March 2021

Abstract
Energy is an important factor of restricting environmental problems. In order to achieve energy transformation, improve energy utilization efficiency and establish a power supply model based on clean energy, vigorously develop clean energy is an important direction of domestic energy development. This paper constructs a multi-energy load prediction model based on grey GM (1, 1) for urumqi clean energy system and calculates the urumqi as an example of the proposed model. On the one hand, this paper can verify the effectiveness of the model for this problem, on the other hand, this paper can obtain the power generation, power consumption of the whole society, typical daily wind, light output curve and typical daily load curve of urumqi during the “14th and 5th” period, so as to provide references for further local energy planning.
First-principles study on the geometric, electronic and thermodynamic properties of the CsPbI3 (001) surfaces
Authors: Yang Kun , Zhang Yikun , Lu Haotian 
Published: March 2021

Abstract
The structural, electronic and energetic properties of the cubic perovskite CsPbI3 (001) surfaces are studied using first-principles calculations. Two types of terminations (CsI- and PbI2-terminated surfaces) are investigated. Our calculations suggest that the PbI2 termination is smoother than the CsI termination. The surface stability analysis indicates that the CsI-terminated surface is more energetically stable. The band gaps of the CsI and PbI2 terminations are determined to be 1.664 and 1.452 eV, respectively, which are larger than that of the CsPbI3 bulk.
Application of Local Materials in the Renovation Design of Local Buildings
Authors: Wu Chuntao 
Published: March 2021

Abstract
In the process of urbanization, the gradual loss of the characteristics of traditional villages caused by the destruction of environmental resources calls for the attention to return to pursue the essence of traditional village architecture as well as traditional building renovation and environmental coordination. Through the study of the characteristics, craftsmanship and aesthetics of the local materials, the transformation and design of the local buildings with the theory of oriental design are used to show the coexistence of the local customs, architectural characteristics and natural environment. Through the experimental study on the application of local materials in this paper, the design strategy of local materials for the transformation of traditional buildings is summarized to protect and inherit Chinese local buildings, which has a deep developmental significance to the transformation and application architectures in future.
Discussion on Short-Term Dynamic Economic Dispatch of Renewable Energy High Penetration Power Grid
Authors: Xu He 
Published: March 2021

Abstract
Before the widespread use of alternative energy sources, economic dispatch only included traditional thermal power units, which needed to consume a large amount of non-renewable energy and produce polluting emissions such as carbon, sulfur and nitrogen. In the current situation of increasingly serious energy crisis, wind energy has become an important representative of new energy. However, wind energy is difficult to predict, so that the output power of wind turbines cannot be dispatched and distributed as expected, and the intermittent and random nature of wind energy will also bring security and stability threats to the entire grid after large-capacity wind power is connected to the grid. Therefore, it is necessary to study a reasonable short-term economic dispatching energy saving plan including wind farms. Therefore, in-depth analysis of the coordination and interaction mechanism between high-penetration distributed power sources and other dispatching resources, and discussion of reasonable optimal dispatching methods are of great significance for promoting the consumption of high-penetration distributed renewable energy and improving the safe and economic operation of the power grid.
Experimental Study on Heat Distribution of High-Voltage Cable Terminals under Operating Conditions
Authors: Xu Minhu , Guo Yun , Zhang Kexin , Zhang Hang , Shang Shulei , Zhao Xiangyu 
Published: March 2021

Abstract
The insulation failure of the outdoor terminal of the high-voltage cross-linked polyethylene (XLPE) cable has a significant impact on the operation stability of the power grid. Effective evaluation of its thermal state is of great significance to predicting its insulation failure. The paper uses infrared thermal imaging to analyse the thermal field distribution characteristics of the outdoor terminal surface under different ambient temperatures. Test results, theoretical calculations and simulation results all show that the thermal steady-state temperature of the inner and outer layers of the sheath shows a non-linear increase with the increase of the current carrying capacity of the cable, which verifies the correctness of the model, so this model can be used to predict And analyse the temperature distribution of the actual 10kV cable cold shrink terminal at the thermal steady state.
Research on Planning and Optimal Operation of Variable Speed Pumped Storage
Authors: Yao Weiwei , Deng Changhong 
Published: March 2021

Abstract
Combining hydropower market economy and safe dispatching, the paper puts forward a mathematical model for optimal dispatching of variable-speed hydropower generating units, and an online transaction mode that takes into account energy saving and consumption reduction. The power generation sequencing method is determined according to the unit quotation method, and energy consumption indicators are introduced according to reservoir storage. Water volume, etc., adopt a differentiated power plan, open power generation rights trading, and adjust the trading market to ensure the economic benefits of hydropower plants while achieving the goals of energy conservation and environmental protection.
Comparative Study of Chinese and Foreign Ship Power Systems
Authors: Zhang Huachao , Luan Fengkai 
Published: March 2021

Abstract
With the current further exploration of the ocean by mankind, the shipbuilding industry is also receiving greater attention, and the shipbuilding industry needs to carry out deeper structural optimization and technological innovation. As the core of the ship, the ship power system is directly linked to the upper and lower limits of the entire ship. The pros and cons of the power system technology not only relates to the operation of the entire ship, but also directly affects the sustainability, reliability and stability of the ship. This article discusses and researches the ship power system at home and abroad, and analyzes the current development trend of the ship industry power system.
Investigation and Research on the Status Quo of Informatization Development at Home and Abroad
Authors: Zhang Huachao , Xu Haoyuan 
Published: March 2021

Abstract
With the further advancement of the digital age, informatization has become the current most mainstream trend and has attracted widespread attention from the public. As a decisive measure for the country to increase its talent pool and cultivate innovative talents, it plays a vital role in promoting national development and enhancing international competitiveness. This article draws on the strategic measures and policies of French education informatization to analyze the current situation of education informatization in China and look forward to the prospects of the education informatization industry.
Fabrication of MnSn(OH)6@MoS2 Core-Shell Nanostructure with Excellent Supercapacitive Performance
Authors: Lu Qixiao , Kumar Sachin , Chen Tingxuan , Zhu Ling 
Published: March 2021

Abstract
Three-dimensional (3D) core-shell structure of MnSn(OH)6 nanobox with MoS2 nanosheet is grown by series of simple steps for supercapacitor application. This core-shell is composited of MnSn(OH)6 nanobox as core and MoS2 nanosheet as shell. As-synthesized electrode material was characterized by Field emission scanning electron microscope (FESEM), energy dispersive spectroscopy (EDS) and transmission electron microscope (TEM). As-fabricated MnSn(OH)6@MoS2 electrode exhibited redox behavior with excellent specific capacitance of 1176 F g−1 at a current density of 4 A cm−2. These findings make MnSn(OH)6@MoS2 a better alternative source for energy storage devices.
Applicability Evaluation of Noise Reduction Materials in Substation
Authors: Hu Sheng , Chen Wei , Zhao Ruidun , Lu Ling , Cao Hao , Peng Jiwen 
Published: March 2021

Abstract
The noise reduction materials of substation need to meet the practicability, technology maturity, economic reliability, security and other factors. Based on the preliminary establishment of the evaluation index system for the applicability of noise reduction materials, this project uses analytic hierarchy process to determine the weight of the evaluation factors at all levels of the index system by using the rationality of the evaluation index system, the relative importance of the evaluation factors (weights) and the rationality of the assignment method. The applicability evaluation model of substation noise reduction materials is established.