bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design and control of optical steady image system of aerial camera
Authors: Di Zhimin , Zhong Xiangqiang , Fan Jingsong 
Published: February 2022

Abstract
In order to solve the problem of aerial photography imaging blur, an aerial camera optical image stabilization system is designed. Based on the principle of optical image stabilization, a forward image stabilization system of aerial camera was designed by analyzing the imaging blur of aerial camera. The equivalent resolution of the system is 500-1000 l p/mm, and the corresponding pixel size is 1-2 μm. Aiming at the optical image stabilization system to establish its PID and corresponding adaptive PID control model, establish its closed-loop system transfer function, and use MATLAB to simulate and analyze the control system. The results show that the whole image stabilization system becomes stable after 0.01s and can achieve the goal of image stabilization. It solves the problem of forward image motion of aerial camera, and greatly improves the imaging effect of aerial camera when it works.
Study on the Properties of Water Molecule at Different Temperatures
Authors: Li Yuanze 
Published: February 2022

Abstract
Using computers as tools to perform molecular dynamics simulations from a microscopic point of view to explain macroscopic physical phenomena has become mainstream. This article discussed the properties of water molecules at different temperatures from the perspective of molecular dynamics simulation. In terms of general physical properties, this article investigated the trend of water viscosity and thermal conductivity with temperature by collecting and comparing existing literature data. The conclusion is that the viscosity decreases with increasing temperature, and the thermal conductivity increases with increasing temperature. In terms of special properties, this article took the hydrogen bond of water as the research object, and made a comprehensive analysis from three aspects of hydrogen bond length, hydrogen bond angle, and the hydrogen bond coordination number, which includes data analysis of existing literature and molecular dynamics simulation analysis. The latter used “Moldy” to perform three molecular dynamics simulations on water molecules at different temperatures, and imported the simulation results into “Vmd” for visual analysis. The results were compared with the existing literature data, and the conclusions were almost the same. That is, as the temperature increases, the hydrogen bond length becomes slightly longer, the hydrogen bond angle becomes smaller, and the hydrogen bond coordination number becomes less.
Research on the Status of Two-dimensional Layout Circular Parts
Authors: Ji Jun , Xing Fei-Fei , Zhang Sai-Kun 
Published: February 2022

Abstract
This paper introduces the research background of the two-dimensional circular part layout problem, analyzes the complexity of the layout problem, studies the current research status of the circular part layout problem, and finally, lists the relationship between layout methods and layout schemes of the two-dimensional circular part layout problem.
Design and analysis of multi-channel signal acquisition circuit based on FPGA
Authors: Zhang Jian Yu , Na Jie Si , Guo Fu Chun , Jiao Yu Chen 
Published: February 2022

Abstract
This paper designs and implements a real-time underwater acoustic signal acquisition system based on FPGA. The system can collect and transmit the noise generated by ships. It provides the basis and guarantees for the subsequent research and analysis of noise.
The reliability design of inspection device based on the obstacles and the derailment
Authors: Hu Chunhong , Li Juanjuan , Tian Yuan , Zhai Guorui 
Published: February 2022

Abstract
This paper introduces a kind of contact train obstacles and derailment detection device. It is composed of detection device and electric box. The energy produced by collision between obstacles and detection device and the train derailment is converted to electrical signal which can be measured, then it could control emergency braking. It can minimize the impact of foreign matter on vehicle safety or operation order after entering the vehicle limit. This system uses CPLD as the control core and adopts double redundancy design that improved the reliability of the device. It provides guarantee for train running safety and has good application prospect.
Design of Fully Intelligent Quality Error Prevention System for Tobacco Production Line Based on Configuration Software and PLC Program
Authors: Gu Yongqiang , Zhang Xi , Yang Huan , Zhang Jianlin 
Published: February 2022

Abstract
Aiming at the problems of wrong brand, mixed batch and wrong transmission of electronic parameter information in the production of cut tobacco of different brands in the tobacco industry, a fully intelligent quality error prevention system based on WinCC configuration software and PLC distributed control program is designed. The information of the production and manufacturing execution system in the general control room and the brand, batch and other information stored in the PLC of the bottom electric control cabinet is compared and verified instead of manual self-inspection. If the information is consistent, production is allowed. Otherwise, the equipment locks itself and sends alarm feedback. The design and application of the system realize the automatic error prevention of process equipment and the implementation accuracy of production control parameters, to ensure that the production process meets the requirements of process technology, effectively avoid major quality accidents, and finally guarantee the product quality.
Polyester fabric impregnated with carbon nanotubes directly to form a flexible heating fabric
Authors: Wei Xiru , Xiao Yuan 
Published: February 2022

Abstract
In order to solve the problems of complex fabrication process, poor flexibility and high cost of heating element in electric heating clothing, a method of preparing flexible heating fabric by directly impregnating polyester fabric with carbon nanotube was proposed. According to the process flow of preparing flexible heating fabric, the process conditions of uniform loading carbon nanotubes on polyester fabric were determined, the flexible heating fabric was prepared under different process conditions, and the surface microstructure of the flexible heating fabric was observed and its heating performance was tested. The results show that the pretreatment process can reduce the resistance value of the flexible heating fabric. When the concentration of carbon nanotubes is 6wt% and the content of waterborne polyurethane is 35g/L, the flexible heating fabric can be prepared. By observing the surface micro-topography, it can be seen that the surface of the prepared flexible heating fabric is smooth, and a uniform conductive layer of carbon nanotubes is formed on the fabric. A 5V DC voltage was applied to the prepared flexible heating fabric, and the highest heating temperature was 46.8°C within 62 seconds after the electricity was turned on, which realized rapid electric heating and uniform heating, laying a foundation for the subsequent development of heating clothing.
Design of a high-resolution Rayleigh-Taylor experiment with the Crystal Backlighter Imager on the National Ignition Facility
Authors: Angulo A.M. , Nagel S.R. , Huntington C.M. , Weber C. , Robey H.F. , Hall G.N. , Pickworth L. , Kuranz C.C. 
Published: February 2022

Abstract
The Rayleigh-Taylor (RT) instability affects a vast range of
High Energy Density (HED) length scales, spanning from supernova
explosions (1013 m) to inertial confinement fusion
(10-6 m). In inertial confinement fusion, the RT instability
is known to induce mixing or turbulent transition, which in turn
cools the hot spot and hinders ignition. The fine-scale features of
the RT instability, which are difficult to image in HED physics, may
help determine if the system is mixing or is transitioning to
turbulence. Earlier diagnostics lacked the spatial and temporal
resolution necessary to diagnose the dynamics that occur along the
RT structure. A recently developed diagnostic, the Crystal
Backlighter Imager (CBI), [1,2] can now
produce an x-ray radiograph capable of resolving the fine-scale
features expected in these RT unstable systems. This paper describes
an experimental design that adapts a well-characterized National
Ignition Facility (NIF) platform to accommodate the CBI
diagnostic. Simulations and synthetic radiographs highlight the
resolution capabilities of the CBI in comparison to previous
diagnostics. The improved resolution of the system can provide new
observations to study the RT instability's involvement in mixing and
the transition to turbulence in the HED regime.
Economic growth dominates rising potential flood risk in the Yangtze River and benefits of raising dikes from 1991 to 2015
Authors: Qi Wei , Feng Lian , Yang Hong , Liu Junguo , Zheng Yi , Shi Haiyun , Wang Lei , Chen Deliang 
Published: February 2022

Abstract
Flooding in the Yangtze River Basin could severely damage socio-economic development, river ecosystems, food security, hydropower production and transportation in China. The Yangtze River Basin accounts for approximately 30% of China’s gross domestic product (GDP) and is an engine for the country’s rapid economic growth. One commonly held belief is that climate change has intensified extreme flood events, leading to increasing economic damage in the Yangtze River. Here, we quantitatively attributed economic exposure to climate change (i.e. climate-induced changes in weather-related events) and GDP growth, and assessed benefits, i.e. the reduction in economic exposure, from flood defence dikes of varying heights. To do this, we developed a framework by combing a large scale hydrological model, a hydraulic model, and long-term GDP data. We find that climate-induced changes in flood inundation area and resulted economic exposure were decreasing overall, whereas GDP growth drove the increases of potential economic exposure to floods. We also reveal that the basin average flood defence dikes should be at least approximately 3.5 m high to achieve an about ten-year average flood occurrence. Our results have significant policy and socioeconomic development implications.
An extreme event of enhanced Arctic Ocean export west of Greenland caused by the pronounced dynamic sea level drop in the North Atlantic subpolar gyre in the mid-to-late 2010s
Authors: Wang Qiang , Shu Qi , Danilov Sergey , Sidorenko Dmitry 
Published: February 2022

Abstract
The North Atlantic subpolar gyre influences the climate in many different ways. Here, we identified that it is also responsible for a recent extreme event of Arctic Ocean freshwater export west of Greenland. A shift in climate regimes occurred in the mid-2000s, with a significant negative trend in the dynamic sea level in the subpolar gyre since then. We found that the dynamic sea level drop induced a strong increase in freshwater export west of Greenland, in particular from 2015 to 2017, when the sea level was close to the minimum. Sea ice melting and atmospheric variability in the Arctic had only a small contribution to this event. As the exported water from the Arctic Ocean has low salinity and constituents of chemical tracers very different from those in the North Atlantic, such events might have impacts on the North Atlantic ecosystem and the climate as well. Our study suggests that such events might be predictable if the subpolar gyre sea level has certain predictability.
l
1 norm of coherence is not equal to its convex roof quantifier
Authors: Xu Jianwei 
Published: February 2022

Abstract
Since a rigorous framework for quantifying quantum coherence was established by Baumgratz et al (2014 Phys. Rev. Lett.
113 140401), many coherence measures have been found. For a given coherence measure C, extending the values of C on pure states to mixed states by the convex roof construction, we will get a valid coherence measure

C

¯

, we call

C

¯

the corresponding convex roof quantifier of C. Whether

C
=

C

¯

for a given coherence measure is an important question. In this work, we show that for the widely used coherence measure, l
1 norm of coherence

C

l

1

, it holds that

C

l

1

≠

C

l

1

¯

.
Exact crystalline solution for a one-dimensional few-boson system with point interaction
Authors: Tomchenko Maksim 
Published: February 2022

Abstract
We study the exact solutions for a one-dimensional system of N = 2; 3 spinless point bosons for zero boundary conditions. In this case, we are based on M Gaudin’s formulae obtained with the help of Bethe ansatz. We find the density profile ρ(x) and the nodal structure of a wave function for a set of the lowest states of the system for different values of the coupling constant γ ⩾ 0. The analysis shows that the ideal crystal corresponds to the quantum numbers (from Gaudin’s equations) n
1 = ⋯ = n

N
= N and to the coupling constant γ ≲ 1. We also find that the ground state (GS) of the system (n
1 = ⋯ = n

N
= 1) corresponds to a liquid for any γ and any N ≫ 1. In this case, the wave function of the GS is nodeless, and the wave function of the ideal crystal has nodes.
The utility of a standardised breath sampler in school age children within a real-world prospective study
Authors: Bhavra K K , Wilde M , Richardson M , Cordell R , Thomas P , Zhao B , Bryant L , Brightling C E , Ibrahim W , Salman D , Siddiqui S , Monks P , Gaillard E A 
Published: February 2022

Abstract
Clinical assessment of children with asthma is problematic, and non-invasive biomarkers are needed urgently. Monitoring exhaled volatile organic compounds (VOCs) is an attractive alternative to invasive tests (blood and sputum) and may be used as frequently as required. Standardised reproducible breath-sampling is essential for exhaled-VOC analysis, and although the ReCIVA (Owlstone Medical Limited) breath-sampler was designed to satisfy this requirement, paediatric use was not in the original design brief. The efficacy of the ReCIVA at sampling breath from children has been studied, and 90 breath-samples from 64 children (5–15 years) with, and without asthma (controls), were collected with two different ReCIVA units. Seventy samples (77.8%) contained the specified 1 l of sampled-breath. Median sampling times were longer in children with acute asthma (770.2 s, range: 532.2–900.1 s) compared to stable asthma (690.6 s, range: 477.5–900.1 s; p = 0.01). The ReCIVA successfully detected operational faults, in 21 samples. A leak, caused by a poor fit of the face mask seal was the most common (15); the others were USB communication-faults (5); and, a single instance of a file-creation error. Paediatric breath-profiles were reliably monitored, however synchronisation of sampling to breathing-phases was sometimes lost, causing some breaths not to be sampled, and some to be sampled continuously. This occurred in 60 (66.7%) of the samples and was a source of variability. Importantly, multi-variate modelling of untargeted VOC analysis indicated the absence of significant batch effects for eight operational variables. The ReCIVA appears suitable for paediatric breath-sampling. Post-processing of breath-sample meta-data is recommended to assess the quality of sample-acquisition. Further, future studies should explore the effect of pump-synchronisation faults on recovered VOC profiles, and mask sizes to fit all ages will reduce the potential for leaks and importantly, provide higher levels of comfort to children with asthma.
Hybrid solar fish dryers as a solution for improving the quality of fisheries products to support green technology during the pandemic COVID-19
Authors: Risa M , Irawan A , Pratomo A , Khalid A , Fauzi Y R 
Published: February 2022

Abstract
The fishing communities in Sungai Rasau village, South Kalimantan, Indonesia, have several joint business groups that mostly process their fish catch into salted fish products and shrimp paste for sale in the market. The fish drying technique still uses traditional methods that rely on sunny weather, this is not effective because the weather is difficult to predict due to climate change globally. This means that high rainfall affects fish drying production activities. If left unchecked, this certainly results in a decrease in the quantity and quality of salted fish production and affects their income and welfare. To maintain and improve the quality of raw materials for fisheries production, the solution is the use of appropriate technology, namely making salted fish processing equipment or dryers that are energy efficient and not influenced by weather factors such as rain. Using this tool can improve the quality and quantity of production. The form of activity methods carried out includes (1) coordination with related parties to foster local fishing groups; (2) identifying problems and determining solutions; (3) solar fish dryer design; (4) making efficient technology fish dryers that effectively and efficiently utilize solar energy. At the time of implementation of the dryer, the measurement of water content using TDS obtained results that the water content of mackerel has been reduced to about 10%
Effect of time and temperature on vitamin c contents and antioxidant activity in the hot water extraction of melinjo peels
Authors: Apriliyanti MW , Ardiyansyah M , Febrianti W , Arum P , Jayus  , Sjaifullah A 
Published: February 2022

Abstract
Melinjo peel contains ascorbic acid, tocopherol, polyphenols and has the potential as a xanthine oxidase inhibitor. Melinjo peel also has the potential as an antioxidant naturally good for the body. The purpose of this studies to determine effect of variation of time and temperature extractions on antioxidant activity and vitamin C of melinjo peel. This study used a completely randomized design with two factors. firstly, 75 and 100°C for temperature and then secondary factors is different extraction times are 30, 45, and 60 minutes. The highest value of vitamin C content is 313,30 mg/L at 100°C for 60 minutes. Although, the highest value was 30,89% at 100oC for 30 minutes. Consequently, the best treatments at 100 °C and 30 minutes would be appropriate extraction operating conditions.
Increasing maize yield and farming benefit through integrated plant management in Madura Island East Java
Authors: Handayati W , Latifah E , Sugiono  , Subagio H , Sihombing D , Fitria R U 
Published: February 2022

Abstract
Maize is one of the primary plant cultivations on Madura Island and is usually cultivated by farmers with traditional technology and using open-pollinated local varieties. According to this condition, an experiment and a demo plot for local farmers were conducted in Larangan Slampar village Tlanakan District Pamekasan Regency. The experiment was arranged in randomized block design. The treatment was integrated plant management (IPM) using HJ21 and Bima14 hybrid and as control was conventional technology applying local Madura variety. The analyzed data indicated that IPM technology could increase plant yield and farming benefits. The highest harvest yield was shown by IPM1 with Bima 14 variety up to 6.35 ton ha-1, meanwhile existing technology (local Madura variety) only 1.22 ton ha-1 or the productivity was increased up to 422,40 %. The results of the farming analysis showed that benefit with IPM1 reached Rp 15,520,500 and B/C ratio 1,35; while existing technology only Rp 2,168,000 and B/C ratio of 0.55.
Determinants and strategies of social forestry development for integrated coffee agribusiness in the foot of mount Argopuro area, Jember regency
Authors: Djamali R A , Cahyaningrum D T , Putra D E 
Published: February 2022

Abstract
LMDH “Rengganis” Pakis Village, District, Jember Regency has received the Recognition and the Forestry Partnership (“KULIN-KK”) from the Ministry of Environment and Forestry, covering an area of ± 1,032.19 hectares. The forest land is cultivated by 536 families by planting robusta coffee. The research objective is to describe the determinants and strategies for developing an integrated coffee agribusiness area through the social forestry program. The methodology used is descriptive exploratory with an expert system approach. The analysis technique used is cognitive mapping analysis and hierarchy process analysis. Conclusions: (a) Five priority factors are the main determinants of coffee agribusiness development in social forestry programs, namely: legal certainty in forest use, dynamics and cooperation in forest village farme business groups, downstream processing of smallholder coffee products, shortening the trade system chain, support for facilities and infrastructure from the government; (b) Strategy for developing an integrated coffee agribusiness area based on priorities, namely (1) Objectives: developing an integrated coffee agribusiness area in a forest village; (2) Stakeholders, namely: forest farmers/members of LMDH, LMDH Management, LMDH Business Unit, Perhutani, Government, (2) Integrated Coffee Agribusiness Area Development Program: social engineering to increase cooperation in forest village farmer groups, engineering technology to increase coffee productivity, engineering technology downstream processing ofpeople’s coffee, economic engineering to design an efficient coffee marketing chain, development of integrated agro-tourism based on agribusiness and processing of products from social forestry programs, namely coffee and durian commodities.
Improvement of primary frequency modulation test method of renewable energy stations in North-west Power Grid
Authors: Bao Sijia , Li Chong , Qin Xiaodi , Liu Xin , Xu Haichao 
Published: February 2022

Abstract
In recent years, with the rapid development of renewable energy power generation, the operation and structure of the power grid are becoming more and more complex, the difficulty of power balance and frequency regulation is increasing. North-west Power Grid took the lead in carrying out renewable energy frequency modulation function transformation and performance test technology research in 2016, and developed a primary frequency modulation function test method for renewable energy stations in the North-west transmission-end large power grid. In this paper, by calculating and analyzing the response data of some renewable energy stations when Yindong HVDC is blocked, combined with the fast frequency response performance test results of a renewable energy station, this paper analyzes the shortcomings of the current fast frequency response function test methods of the renewable energy stations of the North-west Power Grid, and put forward suggestions for improvement to provide technical support for the promotion of the primary frequency modulation function of renewable energy stations in the northwest transmission power grid.
Integrated reservoir evaluation and simulation study for gas injection: a field case study
Authors: Yue Wenting , Yilin Wang John 
Published: February 2022

Abstract
The objective of this study was to better understand the target oil reservoir through ensemble Kalman filter-based production data analysis, and to optimize the enhanced oil recovery strategy of the reservoir. We first improved our understandings of the heterogeneous properties by combining single-well reservoir simulation model with Ensemble Kalman Filter (EnKF) method. The reservoir properties along with other available in-formation in the geological and simulation models such as production history and well logs were then integrated in one simulation model. We carried out parametric studies to investigate the influence of four production parameters. We also developed the optimized EOR strategy of the target field based on the ultimate oil recovery and economics. Compared with traditional production data analysis methods, the EnKF-assisted production data analysis model from this study proves to improve the reservoir characterization in an accurate and practical manner. The work improved the understandings of Smackover formation and similar analogous fields. The strategic evaluation of in the study, together with the EnKF-assisted PDA model can facilitate the readers in making informed decisions for successful EOR development of their mature fields.