bluuebunny/crossref_metadata_2025_split huggingface dataset:
Nonlinear Parameter Estimation and Experimental Verification of Gravity Sensor Considering Quadratic Error Parameters
Authors: Xie Tianyi , Lu Shuhai , Cao Juliang , Yu Ruihang 
Published: April 2021

Abstract
With the rapid development of inertial navigation technology, the proportion of inertial navigation technology in navigation and positioning is getting higher and higher. The measurement accuracy requirements of inertial components are getting higher and higher. Based on the mature linear calibration method, this article calibrates the quadratic error of the accelerometer component in the inertial component and compensates the error term. In theory, the least squares estimation is used to solve the quadratic parameter. After considering the quadratic term, the measurement accuracy of the gravity sensor has been improved, and the laboratory gravimeter has been used for marine experiments. The experimental results show that the positioning deviation considering the quadratic error term is smaller than the positioning deviation considering only the first error term.
Research on the material fire risk index based on the GA-BP neural network
Authors: Chen Lei , Wang Yiqi 
Published: April 2021

Abstract
To improve the material fire risk index (IFHI) forecast precision and accuracy, we raise a way that the prediction model consists of the genetic algorithm (GA) and BP neural network. There are many merits in this model. For example, the weights and thresholds of BP neural networks can be improved by the advantages that the genetic algorithm can reach the peak of the forecasting accuracy of the whole situation. And we pose MSE, MAE, and MAPE to measure the effectiveness. The result of MSE, MAE, and MAPE is 0.005843, 0.0183, 1.08158. The experimental results show that the IFHI of the polymer can be accurately predicted by GA-BP neural networks.
Research on the Security Algorithm of Reversible Information Hiding in Communication Encrypted Image
Authors: Wang Jijun , Tan SooFun , Yuan Yi 
Published: April 2021

Abstract
Considering the embedding capacity and the security of the algorithm, the paper proposes a reversible information hiding algorithm for encrypted images based on. The information concealer can find the transformed pixel group in the encrypted image according to the same key and use the embedding key to replace the corresponding pixel’s LSB to complete the reversible embedding of secret information. Simulation tests show that the proposed hiding method can realize the lossless recovery of the carrier image and the original image, which effectively reduces the transmission load and has high security.
Numerical Simulation Study on Propellant Stability of Penetration Warhead
Authors: Zhang Menghua 
Published: April 2021

Abstract
For the problem of charge stability of penetration warhead with a booster device. The process of projectile penetrating concrete is simulated by ANSYS/LS-DYNA with two different algorithms (FEM and FEM-SPH), the calculation results of numerical simulation and experience formula were contrasted with the experimental data. The results show that the FEM-SPH coupling algorithm can overcome the shortage of traditional finite element algorithm for dealing with large deformation issue. and the calculation result of FEM-SPH is most closely with the experimental data. The propellant structure can withstand the maximum overload is 29134g. It can provide a reference for the design of the booster warhead.
Discussion on the Performance of M&A Transformation and Upgrading in Manufacturing Enterprises - Taking Hifuture Technology for Example
Authors: Li Yanqin 
Published: April 2021

Abstract
Under the background of “Made in China 2025 strategy” and the integrated development of “manufacturing + Internet”, traditional manufacturing enterprises have set their hands on the Internet one after another to boost their transformation and upgrading through mergers and acquisitions and seek new profitable growth and business development. Traditional manufacturing mergers and acquisitions Internet enterprises belong to cross-border mergers and acquisitions, there is a greater risk of mergers and acquisitions, mergers and acquisitions results are full of uncertainty. According to the data of stock market and the enterprise financial index, build events analysis model and entropy value method to analyze Hifuture M&A performance of science and technology, the results show that the M&A is advantageous to the enterprise new profit growth point, but no significant positive effect on M&A performance, the main manufacturing enterprises of industry competition, resources integration after the merger synergies.
Research on the Influencing Factors of Establishing Buyout Fund And Value Creation Benefits
Authors: Qiu Xiangning , Zhou Yan 
Published: April 2021

Abstract
Buyout funds have risen and developed rapidly in China since 2000. In 2011, “Paradise Dakang” set off a countrywide upsurge of establishing “PE + listed companies” buyout funds. Based on the data of buyout funds set up by listed companies and private equity investment institutions during 2011-2017, this paper studies the influence factors of their decision to set up buyout funds. The research finds that enterprise scale, cash holdings, operating performance and operating revenue growth are positively correlated with the possibility of establishing buyout funds, while leverage level and the proportion of the largest shareholders are negatively correlated with the possibility of establishing buyout funds.The establishment of “PE + listed company” model buyout funds can significantly increase shareholders’ wealth in the short term.
Research on Information Management of Production Workshop Based on MES System
Authors: Chen Pengfei 
Published: April 2021

Abstract
with the progress of science and technology, information technology is in rapid development, production manufacturers are under tremendous pressure, for modern production mode, the information management is an important part of constantly promoting the process of our modernization and informatization in recent years, the use of MES system make it possible to production management informationization, MES technology plays an important role in the process of enterprise informatization, this article mainly introduced the content of MES technology, the function of MES technology and its application in production management.
Current Development in Microsimulation and Experimental Innovation method in JUTTA Model
Authors: Zhou Meng , Men Yuting , Qing Xuwen 
Published: April 2021

Abstract
Nowadays, microsimulation method has been introduced to different fields, such as Social Science, Medicine research and Economic study. This method evaluates the effects of the proposed interventions or policies before they are implemented in the real world. In this article, we will concentrate on microsimulation method used in Social Science by firstly explaining two main streams in microsimulation world, Static approach and Dynamic approach. In the following section, the uncertainty of a Finnish static microsimulation model JUTTA is assessed and Toimtuki model, one of the sub-models in JUTTA is detected to have space to be more accurate. In order to do so, two experimental statistical models-Linear Regression model and Two-Stage Least Squares(2SLS) model are applied to it. From the results, we could conclude that both the Linear Regression and 2SLS successfully improves the accuracy of TOIMTUKI to some extent.
Multi-area Generation Dispatching Distributed Coordination and Optimization Algorithm
Authors: Ji Yuejin , Shi Zhiliang , Su Rongqiang , Zheng Hao 
Published: April 2021

Abstract
As the fast expansion and interconnection of power system, it makes higher requirements for Optimal Power Flow (OPF) calculation in modern power grid. A distributed coordination and optimization method is presented in this paper. Injection power equivalent of sub-system boundary bus is utilized to solve multi-area dispatching problem. Based on regional decomposition model, it decouples the integrated optimization and avoids complex computation of system parameters equivalent in conventional methods. Besides, it reduces the communication between different regions. The nonlinear primal-dual interior point method is used for optimization in each sub-system, outer coordination of boundary bus’s voltage correction is conducted to compute the optimized dispatching in the whole interconnected power system. Numerical simulations are taken in IEEE test systems. The results show that the proposed method is validated, effective and suitable for online application.
Research on Combating Epidemics based on Differential Equations and Cellular Automata
Authors: Xiao Meng , Zhan Qiyuan , Li Yanqing 
Published: April 2021

Abstract
The new crown pneumonia epidemic has swept the world, panic, anxious, and uneasy emotions flowed into the psychology of everyone. This epidemic not only puts many countries in economic crisis, but may also put some small countries in danger of disappearing forever, and even make it impossible for large-scale people to return home. Therefore, the World Health Organization (WHO) and countries around the world need to join hands and work together to further explore ways to effectively control the epidemic. Analyze the relevant data of the four modes of disease (susceptible persons, latent persons, asymptomatic persons, and recovered persons), establish a differential equation model, and combine the results of question 1 to get the trend of the number of asymptomatic infections (present The trend of first rising and then falling) and specific data (it peaked at about 2733 people on the 42nd day after the outbreak; it dropped to 10 people about 70 days after the outbreak; it decreased to 0 at about 80 days). Then we simulated the distribution of asymptomatic infections based on the data reported by the Beijing Municipal Health Commission and combined with the cellular automaton model: the clustering state appeared in the first 10 days, and it gradually dispersed over time, and the distribution became more distributed after about 50 days. Evenly. Finally, it summarizes the applicable fields of this model in life and effective and accurate suggestions for epidemic prevention and risk reduction.
Morphological Study of Bog Bulrush (Schoenoplectiella mucronata) from Rokan Hulu, Riau, Indonesia
Authors: Suhesti E. , Ratnaningsih A.T. , Suwarno E. , Effendi I. 
Published: April 2021

Abstract
Bog bulrush (Schoenoplectiella mucronata) is an aquatic flowering plant, considered as weeds. The stems can be used as material of mats, sacks, box, rope etc. so that it reduce the plastic use. This study aimed to describe the morphology of this aquatic plant collected from Rokan Hulu, Riau, Indonesia. It is a tufted perennial plant with an upright or horizontal rhizome; the stem reaches a height of 80–90) cm, 4–6 mm wide, has a sharp triangular section, has indistinct serrations. The tip leaf is conical into a sheath, 5–7 cm long, ending at a triangular apex, pale brown in color, absent; midrib, petiole, veins, ligule, and blade. Develops a pseudolateral, dense, head-like cluster of 3-20 spikelets; rod main stem, sharp triangle, 20-25 mm long, sharp tip, and usually upright. Fruit an obovoid nutlet, 1.0–2.5 mm × 1–1.5 mm, bluntly 3-angled, blackish, minutely wrinkled. Sessile grain, ovate to cylindrical, flowering length 4–5 mm, fruit length 310-20 mm, many flowers; the glume is spiral, oval, concave, 3–5 mm long, pale brown; bisexual flowers, perianth consisting of (4–) 6 brown hairs with recessed teeth, 3 stamens, superior and 1-locular ovaries, 2–3 stigmas.
Turmeric Potency in Preventing Aeromonas hydrophila Infection in Clarias batrachus
Authors: Riauwaty Morina , Siregar Y I , Mulyani I 
Published: April 2021

Abstract
A study on clinical signs of Clarias batrachus that was fed with turmeric enriched pellets and was infected with Aeromonas hydrophila has been conducted from May to August 2020. This study aims to understand the effects of turmeric in preventing the disease due to A. hydrophyla infection. There were 5 treatments applied, namely Po (no treatment) and Pp (infected with A. hydrophyla, no turmeric), the fishes were fed with 0.5 g/Kg turmeric enriched pellets (P1), 0.7 g/Kg (P2) and 0.9 g/Kg (P3). The fishes used in this study were 10-12 cm (TL) and 13-15 g (BW) and were distributed in 15 aquaria of 50 L (n=10 fishes/aquaria). The fish was fed with turmeric enriched pellets and by the 30th day, the fishes were infected intramuscularly with 0.1 ml of A. hydrophila suspension. In the 14th day after injection, any clinical signs occur were noted. Results shown that the Pn was normal, the Pp shown very bad condition with ulcers, skin lession, frantic swimming, haemorrhage spots and exopthalmia. The fish that were fed with turmeric enriched pellets shown lighter signs. In P3, ulcers occur in the 3th, but it became better by the 12th day. Based on data obtained, it can be concluded that the provision of turmeric enriched pellet is effective to cure the clinical signs of A. hydrophila attack.
Length-Weight Relationship and Condition Factor of Macrobrachium rosenbergii in Kuala Cenaku River, Indragiri Hulu Regency, Riau Province
Authors: Fauzi M. , Efizon D. , Windarti  , Hermawita A. 
Published: April 2021

Abstract
The aim of this research is to understand the length-weight relationship and condition factor of Macrobrachium rosenbergii from the Kuala Cenaku River, Indragiri Hulu Regency. The samples were collected monthly from Mei-July 2020. A total of 297 of M. rosenbergii was caught by fish trap and nets in 4 stations. The average lengths of M. rosenbergii at each station are: 127.2, 151.1, 130.9 and 120.9 mm. The factor conditions range from 0.829345 to 0.93729392. The relationship between length and weight has a determinant value (R2) ranged from 82%-93%. The condition factor of M. rosenbergii at each station is 1.10, 1.16, 1.11, 1.13 respectively and the value of the factor condition was more than 1, indicates that the giant prawns found in the waters of the Kuala Cenaku River is rather fat. This fact indicates that there is a correlation between conditions environment and food availability in the body shape of M. rosenbergii.
Analysis Strength Structure Fising Vessel of Composit Sandwich Plate System Using Finite Element Method
Authors: Romadhoni  , Santoso Budhi , Nasution Polaris 
Published: April 2021

Abstract
Fiberglass composite material is currently widely used as an alternative material or substitute material for metal and wood materials for the manufacture of fishing boats, because it has its own advantages, among others, easily formed in accordance with needs, has good strength and stiffness. However, in the operation of the ship the bow section often experiences a collision or collision so that when the ship is operating and leaning on the dock which causes a collision where the kinetic energy of the boat turns into a collision energy absorbed by the boat’s hull that is hit by a collision. The energy damaged the hull of the boat that was hit, so the front of the ship needs to be done by adding a new material that is a composite sandwich made with the aim of optimal weight efficiency, but has high rigidity and strength. There are many variations in the definition of sandwich composites, but the main factor of the material is the lightweight core, thus reducing the specific gravity of the material and the strength of the skin layer which gives strength to the sandwich composite. This research was carried out a static structural analysis of composite sandwich material using Ansys Workbench 14.5 software. A model is designed and analyzed using 3D CAD software, which is fore ships that have the potential to experience collisions. From the simulation results of the Fenite element method, the maximum principal stress of the model shows that the maximum point is 11.6 MPa. The maximum stress occurs at the ivory bottom, which is 6.9759 kN/m2 or 6.97 kPa, this occurs due to the bow of the fishing boat experienced a great imposition.
Design of Submerged Fixed Bed Filter for High Density Shrimp Culture in Recirculating Aquaculture System
Authors: Thesiana L. , Adiyana K. 
Published: April 2021

Abstract
Shrimp is Indonesia’s the leading export commodities from Indonesia, but in recent years the shrimp industry has been threatened by disease outbreaks due to environmental quality decline. To overcome these challenges, there is a need for a cultivation technology which provides opportunities for intensive shrimp culture in a narrow area, resulting high productivity and having less environmental impact. Recirculating aquaculture systems (RAS) was the best option to provide high density shrimp culture without leading to environmental damage due the system equiped with water treatment unit. This study aimed to design a submerged filter which can be used in commercially recirculating systems for high density shrimp culture. Submerged filter as water treatment unit for ammonia conversion, it was designed based on organic load mass balance derived from feeding regimes. A RAS with 8 m3 volume capacity use for rearing 400 shrimps m−3, has dissolved oxygen levels range between 6-7 mg L−1, nitrification rate 0.45 g TAN m−2day−1 and TAN levels <1.8 mg L−1, based on spreadsheet calculation will require submerged filter media with 0.07 m3 in volume, media depth 0.3 m, and filter media specific surface area 1200 m2 m−3. Submerged filter design for high density shrimp culture in a narrow place must have a compact design. It can be achieved by selecting filter media type with large specific surface area values. Filter media with a large specific surface area makes biofilter design has smaller dimensions. Submerged filter as water treatment unit in recirculating system for high density shrimp culture will reduce TAN level in water. Waste water in this system is reuse for shrimp culture, no waste water disposal to the environment which leading to sustainable aquaculture practice.
Effect of Thyroxine Hormone on Growth and Survival Rate of Bronze Featherback (Notopterus notopterus, Pallas 1769)
Authors: Sukendi  , Thamrin  , Putra R M , Yulindra A 
Published: April 2021

Abstract
Bronze featherback (Notopterus notopterus, Pallas 1769) is an Indonesia’s endemic fish that has high economic value. This study was conducted from July to August 2020 in Sungai Geringging Village, Kampar Kiri District, Riau Province to determine the effects of thyroxine (T4) on growth and survival rate of bronze featherback for 40 days. The experiment lasted for 40 days and used a completely random design with four treatments and four replications. Treatment were P1 (0 mg thyroxine/kg feed), P2 (2 mg thyroxine/kg feed), P3 (4 mg thyroxine/kg feed) and P4 (6 mg thyroxine/kg feed). The fish caught from the Kampar river were reared for 40 days in 1x1x1 m3 with five individuals. per cage. Fish treated in P4 demonstrated high growth in terms of absolute weight (10.05 ± 0.53 g), absolute length (5.27 ± 0.96 cm), daily growth rate (2.97 ± 0.22%) and larval survival rate (95 ± 10%).
The Influence of Coastal and Marine Ecosystem Conditions on Fisheries and Socio-Economic Activities of Local Fishermen
Authors: Hidayati D. 
Published: April 2021

Abstract
Fisheries and socio-economic activities of fishermen, especially traditional local fishermen, largely rely on coastal and marine ecosystem condition. Degradation of coastal and marine resources, particularly coral reefs and fish, is widespread as a result of the increase in pressures on these resources, which tends to continue in parallel with the increase of economic activities in the coastal areas. The high potential of coastal and marine resources has triggered fishermen from outside to utilize these resources for profit without paying attention to their sustainability. This situation creates high competition over resources, leading to conflict of interests and overlapping fishing areas between local and domestic fishermen, as well as those from neighbouring countries. The local fishermen are in a weak position; their fleet, fishing equipment and bargaining position are much worse than the outsiders. Meanwhile, climatic conditions, especially the more frequent extreme weather, also have a major impact on fisheries activities, production and fishermen incomes. This paper discusses these issues in Natuna District, Riau Islands Province, Indonesia. It uses empirical data from Indonesian Institute of Sciences (LIPI) and my related research activities in this location. Data is also collected from secondary sources, including related books, papers, documents, and research results.
Growth of Microalgae Spirulina platensis on Media Containing Palm Oil Mill Effluent
Authors: Effendi I. , Nurrachmi I. , Tarigan A. N. F. 
Published: April 2021

Abstract

Spirulina platensis, a Cyanobacteria, is used as a natural food in fish hatcheries and a food supplement for humans. These microalgae are very nutritious, containing 63-68% protein, 18-20% carbohydrates, and 2-3% fat. Increased production of palm oil has serious side effects on the aquatic environment due to the disposal of palm oil mill effluent (POME). POME are thought to be suitable as nutrients and media to microalgae. This study aimed to determine the effect of POME with different nutrient variations on the growth of these microalgae. This study used a randomized block design (RBD) with 2 factors, namely factor A (POME concentration) which consisted of 3 levels, namely 20 ppm (A1), 40 ppm (A2), and 60 ppm (A3) and factor B (media) namely Walne (B1), and Guillard (B2) with 3 repetitions. The results showed that the addition of POME had positive effect on the growth of S. platensis. The higher the POME concentration the better the growth rates obtained for both types of media. For Walne medium, the best growth was obtained on day 10 of A3B1 (69,447.98 sins/ml). Meanwhile, for Guillard medium, the highest growth was achieved on day 8 of A3B2 (82,027,6 sins/ml).
The Occurrence and Distribution of Microplastic in Sediment of the Coastal Waters of Bengkalis Island Riau Province
Authors: Amin B. , Febriani I. S. , Nurrachmi I. , Fauzi M. 
Published: April 2021

Abstract
The presence of microplastics, which was defined as small pieces of plastic less than 5 mm in size, in the aquatic environment has become a global concern these days. Once in the aquatic environment, microplastics might float in the water column or sink to the bottom sediment, depending on the particle density. This study was conducted in the coastal waters of Bengkalis Island in early 2020 with the aim to determine the occurrence and distribution of microplastics in sediment from six stations with suspected different sources of pollutant input. Sediment samples were taken using the PVC pipe at the depth of 0-10 cm, brought back to laboratory, observed the types and calculated their abundance. The results of the study showed that the highest abundance of microplastics was found at station 6 (83.33 and 26.67 particles/kg for fiber and film) and the lowest abundance was at stations 2 (30.00 particles/kg for fiber) and station 3 (10.00 particles/kg for films). The abundance of fiber type between stations was significantly different (p<0.05), but not for film type (p>0.05). The abundance of microplastics based on colour in each type showed that the highest abundance was in blue colour for fiber and white colour for film type. The abundance of microplastics in the northern part was found to be significantly (p<0.05) higher than in the southern part of Bengkalis Island which was assumed to be due to differences in oceanographic characteristics in both areas such as differences in the type and size of the sediment substrate.