bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rotary Inertial Navigation Active Disturbance Rejection Controller Based on Adaptive Genetic Algorithm
Authors: He Jinyang , Zhuo Chao 
Published: March 2021

Abstract
The high-precision control of the rotary servo is an important way to improve the navigation accuracy of the inertial navigation system. This paper proposes a parameter tuning method of active disturbance rejection controller based on adaptive genetic algorithm. Specifically, in order to ensure that the genetic algorithm has strong capability of global search and convergence performance, it adjusts the mutation probability and crossover probability of the genetic algorithm according to the individual fitness. Compared with traditional PID controller, the simulation results show that the optimized active disturbance rejection controller (ADRC) has fast response speed, no oscillation and no static error. And finally it realizes faster and high-precision control on rotary inertial navigation.
Research on Inter Frame Motion Optimization of Visual SLAM
Authors: Wang Yibo , Liang Weishan 
Published: March 2021

Abstract
The key of visual SLAM is VO (front end) algorithm. Aiming at the problems of complex calculation and low robustness of feature point method widely used in VO, an algorithm for solving camera motion parameters based on chicken swarm optimization algorithm is proposed. Based on the camera pinhole model, the relationship between the two-dimensional image coordinates of adjacent frames and the camera motion parameters is deduced. The optimization function based on Hausdorff distance target is established, and the chicken swarm algorithm is defined combined with visual slam. The fitness function of the algorithm is designed. Based on the checkerboard calibration method, the algorithm is verified by experiments.
Positioning and Ranging Process of RSSI Algorithm Based on ZigBee Technology
Authors: Li Yijie 
Published: March 2021

Abstract
Communication and positioning systems in wireless network are merging and promoting each other. Using wireless communication and parameter measurement to determine the location of mobile nodes, node location information can be used to support location services and optimize network management, improve the location service quality and network performance. In various wireless networks, the location algorithm, location technology and location system to obtain the location information of mobile nodes quickly, accurately and in real time have become the current research hotspot. Based on ZigBee technology, RSSI algorithm is used to complete the positioning and ranging from anchor point to label point, and the positioning and ranging method is applied to practical engineering.
Research and Simulation of Network Control System Smith Estimating PSD Control
Authors: Wang Rongbin , Duan Rui 
Published: March 2021

Abstract
Aiming at the universal problem of time-delay in the Network Control System (NCS) based on the better control of Smith predictive compensation to deal with time delay and the ability of single neuron adaptive PSD algorithm does not need identification process parameters, this paper proposes an intelligent Smith-PSD control based on single neuron adaptive PSD control algorithm and Smith predictive compensation algorithm. The simulation results show that the new controller has a strong robustness and self adaptive, has desirable static and dynamic performance, and its performance is better than that of the regular single neuron PID control or single neuron Smith-PID control.
Design of Three-stage Cascaded Two-Stage Millar Compensated OTA for Wearable ECG Sensor Technologies
Authors: Jianhai WEI 
Published: March 2021

Abstract
The use of wearable sensors to monitor vital signs is an alternative to conventional medical systems in hospitals. Patients with wearable sensors can move freely while under continuous monitoring that can stably receive ECG signals, thereby improve the quality of patient care. In this work, a wearable ECG sensor is proposed. The sensor uses a Three-stage Cascaded Operational Transconductance Amplifier (OTA) as an instrument to amplify the ECG signal. The amplifier uses a Two-stage Millar Compensated amplifier integrated with N-Metal-Oxide-Semiconductor and positive-channel-Metal-Oxide-Semiconductor. The simulation results get a CMRR of 66.84 and 3.967μVrms noise and 0.039μW power and 0.981 Noise Efficiency Factor. Compared with the conventional ECG monitoring system, the entire design is smaller in size, and has low power consumption and low noise. It is observed that one can receive ECG signals stably at all times during the experiment. Also, the collected ECG signal is comparable to the ECG signal obtained using conventional adhesive electrodes.
Software Design of Motor Controller Test System for New Energy Vehicles
Authors: Chen Lei , Mei Lei , Xie Chao , Liao Qi Xin 
Published: March 2021

Abstract
In order to read and write the motor controller parameters, download the motor controller program and make the upper computer interface display the running state of the new energy vehicle drive system. This paper designs a serial communication host computer software using Modbus communication protocol and Ymodem communication protocol. The CAN bus interface is provided by the motor controller. The PC is connected to the CAN bus interface of the controller through USB to realize the communication hardware connection between the upper computer and the lower computer. MFC development framework and C + + programming language are used to complete the development of the upper computer software in Visual Studio 2015. Through the analysis of CAN Bus Analyzer and motor test bench, it shows that the upper computer software runs stably and can correctly read the motor controller parameters and send data to it. The design meets the expected requirements.
Research on Spacecraft Strain Measurement System and Impact Sensing Technology Based on Fiber Grating Sensors and All Fiber Optic Sensing
Authors: Luo Yuxiang , Zhang Qingzhi , Zhang Jiande , Feng Daqiang , Wu Panfeng , Zhang Yongwei , Lv Hongbin , Yang Ning , Wang Dingding , Zhan Hao , Cheng Lin 
Published: March 2021

Abstract
In the process of flight for in-orbit spacecraft, debris and particles in space will collide with the spacecraft at a high speed. These collision will produce strain, pit or perforation on the surface of the spacecraft cabin, forming damage accumulation. Therefore, it is necessary to monitor the strain and impact position of the spacecraft cabin in real time, which will provide a basis for ensuring the reliability and safety of the spacecraft. In this paper, the achievement of strain and vibration information during the process of impact is designed in two ways: touched style and untouched style. The design of touched style needs to meet the requirements of large capacity/ultra-high speed monitoring. The design of untouched style needs to meet the acquisition of high frequency vibration signal in the impact process.
Application of Coanda Effect in Water Jet Propulsion Devices
Authors: Chen Shoutian , Cheng Xuan , Zhang Yan , Ouyang Wu 
Published: March 2021

Abstract
In order to improve the problem of low efficiency of water jet propulsion devices at low speeds, a special multi-ring structure of water jet propeller nozzle is designed based on the Coanda effect. On the basis of the credibility of numerical calculation methods, the hydraulic performance of the special structure is analyzed by using the method of computational fluid dynamics. The results show that the designed structure can effectively improve the problem of low efficiency of water jet propellers at low speeds, which is of great significance to better the performance of water jet propellers.
From lab-to-road: real-world fuel consumption and CO2 emissions of plug-in hybrid electric vehicles
Authors: Plötz Patrick , Moll Cornelius , Bieker Georg , Mock Peter 
Published: March 2021

Abstract
Plug-in hybrid electric vehicles (PHEVs) combine an electric motor with an internal combustion engine and can reduce greenhouse gas emissions from transport if mainly driven on electricity. The environmental benefit of PHEVs strongly depends on usage and charging behaviour. However, there is limited evidence on how much PHEVs actually drive on electricity and how much conventional fuel they use in real-world operation. Here, we provide the first systematic empirical analysis of real-world usage and fuel consumption (FC) of approximately 100 000 vehicles in China, Europe, and North America. We find that real-world mean CO2 emissions of PHEVs are between 50 and 300 g CO2 km−1 depending on all-electric range, user group and country. For private vehicles, real-world CO2 emissions are two to four times higher than test cycle values. The high CO2 emissions and FC mainly result from low charging frequency, i.e. less than once per driving day. Our results demonstrate the importance of real-world vehicle emission measurements and indicate the need to adjust current PHEV policies, i.e. official emission values need to better reflect realistic electric driving shares and incentives need to put more emphasis on frequent charging.
Spatial analysis of coliform bacteria contained in phreatic water in colomadu sub-district karanganyar
Authors: Wisnu I , Muryani dan Ahmad C 
Published: March 2021

Abstract
The objective of this study is to determine (1) the distance of septic tank with phreatic well at Colomadu Sub District; (2) the distribution of colifrom bacteria in phreatic well at Colomadu Sub District; (3) the correlation of septic tank and phreatic well to the content of coliform bacteria The population in this study was all villages in Colomadu Sub District The Sample was using simple random sampling Data collection was carried out by using field measurement for the flow of phreatic water data and septic tank distance with wells and laboratory tests for coliform bacteria content data on phreatic water The analysis used spatial analisis and descriptive quantitative with statistical test was a correlation test The result (1) the distance of septic tank with phreatic well the 11 samples are more than 11 meters 10 samples at 9 – 11 meters 22 samples at 6 – 8 and 27 samples below 5 meters (2) coliform contains in phreatic wells the 25 samples are more than clean water quality standard and 45 samples under clean water quality standard (3) there is negatife relationship of linear correlation (r = -0 27) between the content of septic tank distance with coliform bacteria in phreatic wells
Characteristics of kalisirah karst subterranean stream subdistrict of buayan, kebumen, central java with tracing test
Authors: Triadi W S , Jauhari A , Paripurno E T , Kusumayudha S B 
Published: March 2021

Abstract
The Karst Landscape Region (KRL) Gombong is an area that has developed subterranean stream and provides abundant water resources, one of which is the Kalisirah Springs in Sikayu Village, Buayan District, Kebumen. The Kalisirah spring supports thousands of surrounding communities, especially for domestic needs, fisheries and agriculture. The karst area is an area that is sensitive to change so it is necessary to know the character of a developing subterranean stream system, so that groundwater resources can be maintained in terms of quality and quantity.
The method used is a tracing test with a qualitative and quantitative approach to obtain detailed information about the characteristics of the karst aquifer flow.
Release of trace substances is carried out in Goa Pucung and the fluorometer is placed in the Kalisirah Springs. Release on September 23, 2018 at 9.57 p.m and September 24, 2018 at 3.25 p.m. Fluorometer records an increase in fluorescent concentration. Connection of Goa Pucung-Kalisirah through 2 karst windows (Kalijeblosan and Kaliwinong) that are visible in plain view. The concentration of released tracer substances can be recovered 26.18% in the Kalisirah springs, with discharge recovery reaching 4493%, which indicates a divergence and convergence of the Kalisirah subterranean stream aquifer system. Flow volume from the subterranean stream system of Goa Pucung-Kalisirah reached 23,403,064.49 liters with an average residence time of 24.11 hours. The cross-sectional area is 12.19 m2 and the diameter of the Flow-Channel reaches 3.94 m, and with hydraulic depth from the Flow-Channel 3.09 meters.
Level of population mobility in wonogiri regency
Authors: Hardati P , Rahayu H N 
Published: March 2021

Abstract
The diversity of phenomena on earth led to differences in the characteristics of each region, while the needs of the population are very diverse. These conditions lead to interactions between regions that support population mobility. The focus of this research is permanent population movement or referred to as permanent mobility. Researchers assume that the population is an important component of population mobility that affects the distribution and use of space so that control is needed for regional development planning. This research aimed to analyze the level of permanent in, out and net mobility in Wonogiri. The type of research is quantitative descriptive research. The population in this research that resident of Wonogiri Regency who performs permanently mobility. Research variables used ie the number of in mobility and out mobility. The results showed that the level of permanent mobility entered Wonogiri at 8,56 and permanent mobility levels out at 10,55 as well as the level of net permanent mobility Wonogiri -1.98. The result is known that the out population of Wonogiri more than the in population in Wonogiri. The condition indicates that the thrust of Wonogiri higher than the attractiveness of the area.
The externalities value of mangrove forest conversion into fishponds in the coastal area of wulan delta in demak regency
Authors: Rudi F S , Harini R 
Published: March 2021

Abstract
The high dynamic development in Wulan Delta coincides with the mangrove forest conversion into fishponds. The purpose of this research was to determine the externalities value of mangrove forest conversion into fishponds in Wulan Delta in Demak Regency. This research used a quantitative descriptive method. The data were collected through surveys using questionnaires and an interpretation of fishpond and mangrove forest use through Sentinel 2A on 2016 and 2018. The targets in this research were residents of Menco Hamlet and fishpond owners in Wulan Delta. The data were processed by calculating the economic value of the direct and indirect uses of mangrove forests as negative externalities, and fishpond production as positive externalities. The analysis was carried out in a descriptive-quantitative way by comparing the negative externalities value and the positive externalities value of mangrove forests conversion into fishponds. The results of this research show that the conversion of mangrove forests into fishponds indicates negative externalities. The negative externalities are indicated by fishpond productivity which is not able to surpass the mangrove forest use, even in terms of direct value only.
Practicum based learning in the material “understanding the basics of mapping” in geography subject high school
Authors: Maulidian M O R , Abdi A W , Hasmunir  
Published: March 2021

Abstract
This article explains the experience in implementing practicum-based learning, especially in making maps, in geography Subject Grade X High School in Banda Aceh. It provides an overview of the application of practicum-based learning on map (cartography), which can be referred to by high school geography teachers, especially in Chapter 3.2. “Understanding the basics of mapping, remote sensing, and geographic information systems (GIS)”. This was a literature review that is following the experience of the application of practicum-based learning that we have done in subject schools. The application of practicum-based learning based on maps was done by general practicum based; Grouping, Preparing Materials, Understanding Step Activity, Working Project, and Sharing/Confirm Result. The learning was six themes: (1) copying map data into new maps manually, (2) lettering and completing map attributes, (3) manually counting area on the map, (4) Zoom in and out of the map, (5) Make a Map of the Globe, and (6) Overlays the Map Manually. Copying maps and lettering maps makes students understand about the data and attributes of general maps and understand the elements on the map. Students learn to make grid boxes and calculate the area with map scale make them do basic for calculating the area with pixels digitally. Making maps of a globe directly teaches them the principle of drawing the earth into a flat. Overlapping maps makes students understand the basics of map functions and determine information on it.
Community learning centre in improving disasters awareness through environmental education
Authors: Akbar Z 
Published: March 2021

Abstract
The Community Learning Center is a non-formal education program that aims to expand the reach of education in the community by involving community participation. Environmental education is one of the materials given to students in this centre. This can be an opportunity to increase community disaster awareness especially in relation to floods disaster that often occur in the area. The purpose of this paper is to find out: (1) Strategies to increase the role of community learning centre in improving disaster awareness through environmental education, (2) Environmental education that can be utilized in increasing disaster awareness in community learning centre in East Jakarta, (3) Factors supporting and inhibiting strategies for improving disaster awareness through environmental education at community learning centre.
Evaluation of environmental based geography instructional model in high school
Authors: Prihadi S 
Published: March 2021

Abstract
The environment has a role in human life. Learning in schools should introduce students to environmental awareness. The goal is for students to keep the environment sustainable. In research on the geography instructional model has the purpose of conducting a test of product one to one evaluation, small group evaluation, and field triall evaluation. The evaluation product model was conducted in high school in Surakarta. The result of a product test is that the environment-based geography instructional model is effective for creating a fun learning. During the test the product can be concluded that students are highly motivated when invited to study geography by discussing environmental issues.
Effect of learning project model-based learning on GIS spatial thinking skills students
Authors: Romadlon R W , Yusuf Y , Sarwono  
Published: March 2021

Abstract
Developing students in geographic information technologies is the main reason for describing things like models and approaches, which is based on classroom learning and focus on theories of teaching and learning technical. This research used quasi experimental True Experimental Design model with pretest-posttest control group design and 45 students of 12th grades of MAS AL ISLAM in academic year 2018/2019 as the population. Purposive sampling with initial data values First Final Assessment were used based on 12th grades Social 1 as the control class and Social 2 as the experimental class. In the control class, GIS learning is applied conventionally while the experimental class is applied Learning Project Based Learning Model-GIS. The data method were analyzed by SPSS 16 software through observation, documentation, and testing STAT (pretest and posttest) with quantitative data analysis techniques. The results showed that the Project Based Learning Model Learning-GIS affecting spatial thinking abilities 12th grades Social 1 students by tests Independent Samples T-test posttest score STAT students who demonstrate the significant value of 0.02 (<0.05). This is consistent with the study of theory about project-based learning model in GIS material as a model approach that is effective to increase the spatial analysis techniques.
The environmental care level of junior high school students in surakarta
Authors: Arjani A , Santoso S , Muryani C 
Published: March 2021

Abstract

Adiwiyata School is a place that facilitate the students to elevate their awareness dealing with the importance of taking care of the environment. The purpose of this research is to find out the implementation of Adiwiyata School and the students’ environmental care attitude on Adiwiyata State Junior High Schools (SJHS / SMPN) in Surakarta. The technique of the sample collecting employs Stratified Technique random sampling to determine the sample which is being examined, random sampling for teacher sample and staff also sampling quota for the students. The techniques of collecting data are field observation, questionnaire, interview, and documentation. The result of the research shows that the implementation of Adiwiyata School at SJHS 1, 7 and 11 in Surakarta is categorized as excellent. The students’ environmental care towards Adiwiyata School, which is seen from the result of the calculation, shows that the mean percentage is categorized as excellent.
A possible opak fault segment that caused the 2006 mw 6.3 yogyakarta earthquake and its future implication
Authors: Pratama C , Widjajanti N , Parseno  , Pinasti A , Ummi R F , Lestari D , Sunantyo T A , Heliani L S , Ulinnuha H 
Published: March 2021

Abstract
On May 26th, 2006, the Mw 6.3 earthquake devastated the Yogyakarta region in a shallow strike-slip mechanism. Previous studies suggest the 2006 Yogyakarta earthquake aligned with the Opak river fault. However, several studies reported the aftershock distribution occurred along the eastward side of the Opak river fault strike. Those discrepancies may indicate two possibilities. First, the Opak river fault has an eastward dipping fault. Second, there are unidentified fault lines rather than Opak river fault. In this study, we investigated the fault segment that was responsible for the 2006 earthquake. We estimated the fault length based on seismic moment release assuming rigidity, fault depth, and coseismic displacement are 30 GPa, 12.5 Km, and 1 m, respectively. Therefore, we investigated the two possible scenarios using multi-years and recent Global Navigation Satellite System (GNSS) network developed by the Department of Geodetic Engineering, Universitas Gadjah Mada. The GNSS observation suggests the 2006 Yogyakarta earthquake occurred on the unidentified fault rather than has an eastward dipping fault. The estimated fault length is only 9.2 Km segment. Hence, the present study implies that other fault segments might not have released the accumulated stress and may become large earthquakes in the future.
Disaster concepts and mitigation based on the students of the language and arts faculty, universitas negeri semarang
Authors: Irawati R P , Siminto  , Supriatnaningsih R 
Published: March 2021

Abstract
Disaster mitigation, in accordance with the Republic of Indonesia Law Number 24 of 2007 article 47, is carried out to reduce disaster risk for communities in disaster-prone areas, which can be in the form of education, counseling and training, conventional or modern. The formulation of the issues to be discussed in this article is the concept of disaster and disaster mitigation according to the students from Faculty of Language and Arts of Universitas Negeri Semarang. The research subjects were Universitas Negeri Semarang’s students, especially the students from the Faculty of Language and Arts. Data collection of this study were interviews and questionnaires. The data analysis technique of this study used qualitative descriptive techniques. 56% of students think that natural disasters are more dangerous than social disasters and non-natural disasters, because natural disasters cause huge losses, both soul and property. 70% of students think that the residence and campus environment are safe from the dangers of natural disasters, because natural disasters have never occurred and are not in disaster-prone areas. 65% of students think that disaster mitigation has not been implemented and the community does not yet know the procedures for rescuing themselves during a disaster.