bluuebunny/crossref_metadata_2025 huggingface dataset:
Towards a Collaborative Strategy for Land and Marine Geospatial Data Integration: A Review
Authors: Rosly MA , Ahmad A , Tarmidi Z , Khair Z , Zulkifli N
Published: August 2020

Malaysia is among the countries in Southeast Asia surrounded by sea, apart from Thailand, Singapore, Brunei, Indonesia, Philippines and a few others, with about 515,000 kilometres squared land at sea level skirting Malaysia along 4,809 km of coastlines. Improving the management of coastal areas is important to improve the sustainability of the areas, and one way to achieve this is through collaborative management by integrating land and marine spatial data. This paper highlights the importance of bringing in the concept of collaboration between agencies and addresses issues related to the realization of integration of dataset sharing between land and marine. The concept of collaboration, past studies related to development of collaboration strategies, issues and problems in collaboration, as well as success factors in the collaboration process are discusses in this paper to demonstrate the importance of building a collaborative strategy model to enable the integration of geospatial datasets between land and marine.
Assessing the Sustainable Fishery-based Industry in Malaysia Using the Analytic Hierarchy Process (AHP)
Authors: Awang A , Wan Mohd W R , Abdullah L , Lee S T
Published: August 2020

The concept of sustainability in the fishing-based industry is to reach and maintain the fishery at the maximum sustainable yield. This principle is important to ensure that the population of fish is maintained without compromising the ability of the future generations to meet their own needs. Inefficient sustainable management could cause the depletion of natural resources, pollutions and natural habitat loss in the future. Therefore, a good sustainable management for fishery should be emphasized so that future generations can enjoy what we have today. However, the fishery management is characterized by multiple conflicting attributes which are complicated to be inspected. In this paper, we would like to investigate the fishery management problem analytically by using the Analytic Hierarchy Process (AHP) method. Considering four criteria and thirteen sub-criteria influencing to the sustainability in the fishery-based industry, the AHP method will analyse and prioritize each criterion and sub-criterion. The BPMSG AHP Online System is used as the tool to process the collected data and the final results show that the protected species interaction (PSI) is the most important sub-criteria towards achieving the sustainable fisheries. This followed by the sub-criteria of profit (14.2%), employment (10.9%) and overfishing (8.90%). These four top sub-criteria must be monitored regularly as it can influence the sustainability of fishery-based industry. The other sub-criteria have their own priorities which should not be neglected as well.
Examining the convergence of energy consumption: comparison between oil importing versus oil exporting countries
Authors: Fauzi N N , Raja Bungsu R R A , Sek S K
Published: August 2020

Convergence analysis is one way to check for the sustainability. In this study, examination of convergence is performed to check on the sustainability of energy consumption in the main oil importing versus oil exporting groups. In particular, we examined for stochastic versus beta conditional convergence. In addition, the speed of convergence is compared among countries using time series and panel data analyses. For the purpose of analysis, the generalized method of moments (GMM) and seemingly unrelated regression augmented Dicky-Fuller (SURADF) techniques are applied. The results revealed the evidences of convergence in energy consumption in two groups of countries, indicating the sustainable of energy consumption. The speed of convergence is very similar for both groups of countries. However, the speed of convergence is varying across individual countries. The main determinant contributes to energy consumption is oil price.
Effect Camel’s milk in male albino mice exposed to ferrous sulfate toxic
Authors: Mohammed Ahmeed Aldulaimi Adnan , Ibrahim Hussein Al Jumaily Abd-Alhadi , Farooq Husain Feryal
Published: August 2020

This study was aimed to search the effect of Camel milk on males albino mice exposed to ferrous sulfate toxic 30 mg / kg body weight for period 30 days. The animals were randomly divided into 3 groups, each group comprising 5 animals that weigh 26-27 gm. The results of oral dose were shown with ferrous sulfate a significant decrease in (P <0.05) in body weight, MON, GRAN, HCB, HCT. And significant increase (P<0.05) in kidney, spleen, LYM, MCHC, AST, ALT, Urea. And no significant difference in the heart, liver, WBC, RBCs, MCV, MCH, Protein and Albumin compared with the control group. As for the results of oral dosage of Camel’s milk + ferrous sulfate appeared a beneficial effect of these values compared to the group given ferrous sulfate. The oral dose of ferrous sulfate causes pathological histopathological changes in the kidneys and liver of male mice. The tissue is Separation of central venous wall from Hepatocyte and the Existence of congestion in the liver and Clear hemorrhage within the kidney tissue with a clear contraction of renal glomerulosclerosis in the kidneys. The treatment with Camel’s milk + ferrous sulfate showed the return of central vein and hepatocytes to a semi-natural condition with congestion remaining within the central vein in the liver and showing Glomerulus and urinary tubules are almost normal in the kidneys. Showed an effect to reduce damage or damage completely in certain areas of the tissue compared to ferrous sulfate group.
Effect of Spray with Nano NPK, Complete Micro Fertilizers and Nano Amino Acids on Some Growth and Yield Indicators of Maize (Zea mays L.)
Authors: Alzreejawi S. A. M. , Al-Juthery H. W. A.
Published: August 2020

In order to evaluate some growth and yield indicators of maize plant towards foliar spray by Nano NPK and Nno complete micro (NCM) fertilizers, and Nano amino acids (NAA). A field experiment was implemented in the summer season of 2019 according to the Randomized Complete Block Design (RCBD) with three replicates for each treatment. The experiment consisted of two factors; the first factor consisting of: control, Nano NPK (20-20-20) and NPK (12-12-36); while the second factor consisting of: control, NCM, NAA and NCM + NAA.

The studied indicators on maize plant included chlorophyll content in leaves (SPAD unit), plant height (m), stem diameter (cm), biological yield (ton. h−1), grains yield (ton. h−1), harvest index (%). Results showed the significant superiority of Nano NPK (12-12-36) spray in achieving the highest means for all studied indicators. Spraying of NCM + NAA achieved the highest means for chlorophyll content in leaves, stem diameter, grains yield and harvest index. The interaction of the study factors gave by the combination of Nano NPK (12-12-36) with NCM + NAA, the highest means of chlorophyll content in leaves, plant height, stem diameter, grains yield and harvest index.
Plant Biostimulants, Seaweeds Extract as a Model (Article Review)
Authors: Al-Juthery Hayyawi W.A. , Abbas Drebee Hayder , Al-Khafaji Bassim M.K. , Hadi Rooa F.
Published: August 2020

Plant biostimulants are classified as substances which have increased the positive effects on growth and productivity when applied to plants. Biostimulants are obtained naturally from various economically and environmentally viable sources, The plant biostimulants currently accepted include extracts of seaweed, humic substances (humic acids and fulvic acids), chitin and chitosan derivatives, amino acids, protein hydrolysates and microbes. Seaweed extracts and humic acids are widely studied for their role in plant growth-promotion, Seaweeds have been traditionally used in coastal Europe since time immemorial as fertilizers and soil conditioning agents. Seaweeds belong to Rhodophyta, Chlorophyta and Ochrophyta. Over the past two decades, seaweeds havebeen processed and marketed as seaweed extracts in various formulations for use in agriculture and horticulture. Seaweed extracts are rich in micro and macronutrients, polysaccharides, proteins, poly unsaturated fatty acids, polyphenols, phytohormones, and osmolytes. These compounds elicit multiple beneficial effects in plants, including enhanced seed germination and establishment, overall plant growth and productivity, resistance against biotic and abiotic stresses and increased post-harvest shelf lifeNumerous studies of the beneficial effects of seaweed extracts on crop plants and crop production, yield and productivity have been published.
Effect of spraying with zinc nanoparticles, Humic acid, and adding the mineral fertilizer on the growth of pear seedlings (Hollywood cultivar)
Authors: Tarkhan Abo Almeekh Mohammad , Lateef Assi Sabah , Kadhum Abdul Ameer Hammed
Published: August 2020

The study was conducted at the Al-Hindiya Gardening Station (Karbala province), To study the effect of spraying 3 levels of nano zinc (0, 2, 4 g.L−1) and two levels of humic acid solution (2, 4 ml.L−1) and adding urea mineral fertilizer at two levels (5, 10 g.seedlings −1) in the growth of pear seedlings, Hollywood cultivar grafted on apricot seedlings. The experiment was conducted according to completely randomized designs with three replicates, and the results were as follows: The treatment of zinc at a concentration of (2 ml.L−1) was significantly higher in all vegetative growth traits that included seedlings length, stem diameter, number of leaves, leaf area, dry material of the plant and leaf content of chlorophyll and zinc and gave the highest averages of 84.20 cm, 7.62 mm, 40.70 leaf.seedling−1, 23.67 2 cm2, 42.28 g, 30.27 spad, 9.71 mg.100 g−1, respectively, by comparison treatment, Where, the treatment with a humic acid concentration of 4 ml. Liters -1 was excelled on the above traits and gave the highest averages amounted to 78.17 cm, 7.04 mm, 41.73 leaf.seedling−1, 23.64 cm 2, 43.53 g, 29.17 spad, 9.34 mg.100 g−1 in respectively compared to the treatment of 2 ml.L−1, the treatment of adding urea mineral fertilizer at the level of (10 gm.seedling−1) was significantly excelled by giving the highest values of all studied vegetative traits amounted to 77.89 cm, 7.18 mm, 39.87 leaf.seedling−1, 22.45 cm 2, 42.19 g, 28.64 spad, 9.39 mg. 100 g −1 respectively Keywords: term, term, term
Affectivity evaluation of Bacillus subtilis in controlling eggplant root rot caused by Rhizoctonia solani and Fusarium solani
Authors: Madhi Q. H. , Jumaah A. M.
Published: August 2020

This study included an evaluation of the efficacy of bacteriaBacillus subtilisobtained from Biohealth fertilizer to control the disease of eggplant root rot, caused byRhizoctonia solaniandFusarium solani. The survey results showed that the disease was observed in all the subjected sites, which were Btera, Maymouna, Saad River and Greta in Misan province. The disease incidence ranged in the four sites between (15-44%). Several pathogenic fungi were isolated and diagnosed, with the most notable and most frequent appearance(R. solaniandF. solani)with (35.29 and 29.41%) and (16.91 and 14.18%), respectively. Four isolates were obtained from the fungusR. solaniand three isolates fromF. solani. All tested fungal isolates caused significant decrease in the percentage of germination seeds in varying proportions, as well as the infection of eggplant root rot with varying proportions. The use of the bacteria (B. subtilis)led to a decrease in the percent severity of disease, and an increase in the soft and dry weight of the vegetative and root groups, as well as a clear increase in the height of plant, leaf number and leaf area of the eggplant. The use ofB. subtilisincreased the total phenol content (18.4 and 17.8 mg/ml) compared to the control treatment (16.4mg/ml).
The effect of sex of calve and parity on milk production and its components in Iraqi buffaloes
Authors: Luaibi Dagher Al-Khauzai Allawi , Kawkab Al-Muhja Raed , Ibrahim Mahdi Al-Ghalibi Osama , Wael mukheef Al-fatlawi Raed , Neamah Kadhim Raeda , Mohammed Kareem Al-Kafaji Basim
Published: August 2020

The aim of this research is to determine the effect of sex of calve and parity on milk production and chemical composition in Iraqi buffalo milk. This study included 300 milk samples from 100 buffaloes in Al-Mishkhab district / Najaf Governorate during the period from January to June 2019. The results have appeared that sex has a high significant (P<0.01) effect on production of milk, where the higher production is recorded for the milk of animals with male births (1568.936/L±30.966) compared to animals with female births (1377.649/L ±28.993) and a significant effect of sex of calve is recorded on total solid compounds. A high significant(P<0.01) effect of parity is recorded on both milk production and total solids, The higher average milk production is recorded for the Larger animals. At the same time, parity had a significant effect on milk fat and minerals.
Effect of Foliar Spraying with (Micro Nate) and Fol Spray Fertilizer on the Traits of Vegetative Growth for Apple Seedlings (Anna Cultivar)
Authors: Abd Alkadem Hadi Akram , Mehdi Muhsen Mohammed , Saleh Hassoun Ali
Published: August 2020

This experiment was conducted during the agricultural season(2018-2019) in one of the nurseries in Al-Qasim district of Babylon province, To study the effect of spraying with nutrient solution MICRO NATE and spraying with fol spray fertilizer on some vegetative growth traits of apple seedlings (Malus domestica)Anna. The experiment included testing three concentrations of MICRO NATE (0.04, 8 g. L-1)and three concentrations of fol spray Fertilizer (0.03 and 6 g. L-1).a factorial experiment was conducted according to the Completely randomized design with three replications averages were compared using the least difference test (L.S.D) below the 5% probability level, according to the program Genestat 2010,The results concluded with the following: Spraying plants with MICRO NATE fertilizer at a concentration of (8 g.L-1) separately and spraying with fol spray fertilizer at a concentration of (6 g.L-1) separately, led to the significant increase in all studied traits compared to the lowest values resulting from plants treated with distilled water (control treatment).Results of the interaction between spraying plants with MICRO NATE fertilizer at a concentration of (8 g.L-1) With spraying with fol spray fertilizer at a concentration of (6 g.L-1) showed the significant increase in plant height, total number of leaves and increase in leaf content of total chlorophyll.
DNA Molecular Characterization of Sweet Pepper cv. Flavio as Affected by Seaweed Extract and Amino Acids
Authors: Abbas Al-Zubaidy Intethar , Abbas Al-Hamzawi Majeed
Published: August 2020

Seaweed extract at three concentrations and a mixture of amino acids at two concentrations were tested for their effect on some DNA molecular characteristics of of sweet pepper (Capsicum annuumL. cv. Flavio). The experiment included the determination of variation percent and the genetic distance of treated and control plants using Randomly Amplified Polymorphic DND (RAPD-DNA) Technique with five primers; OPB-4, OPB-5, OPB-9, OPB-11, and OPB-14. The variations between the manipulated fragments were explored for each treatment using gel electrophoresis. Results revealed the presence of genetic variations between treated and control plants, whereas the highest variation (33.33%) was obtained using OPB-4 and OPB-11 primers, while the lowest variation (13.04%) was obtained using OPB-9 primer.
Management and Construction Strategy of Water Supply and Drainage Engineering
Authors: Song Taiquan
Published: August 2020

For the water supply and drainage project, it is not only beneficial to the country and the people, but also an important industry in China’s economic structure. Therefore, it is necessary to effectively manage the water supply and drainage project and actively apply advanced construction technology to ensure that its construction quality meets the corresponding requirements and standard specifications. This article summarizes the construction management of water supply and drainage projects, analyzes the water supply and drainage construction techniques, and proposes corresponding construction management strategies.
Case Study of the Emergency Operation Model in Upstream Pools of the Accident Pool of the Middle Route of South-to-North Water Diversion Project
Authors: Xu Yi , Zheng Hezhen , Lin Junqiang , Quan Jin , Peng Qidong , Jin Tiantian
Published: August 2020

In order to apply the emergency operation Model in Upstream Pools of the Accident Pool of the Middle Route of South-to-North Water Diversion Project we have developed, a one dimensional hydraulic model was developed and a case study was carried out. The results showed the emergency operation model can determine reasonable emergency operation measures in the upstream pools. In addition, some suggestions were put forward to help deal with the emergency operation measures in the upstream pools.
Calculation of and Analysis on Inlet / Outlet Structure of Hydropower Station Based on Ansys
Authors: Wu Du , Tian Zhao , Zhang Mengjie , Li Yu , Li Zhiyu , Zhang Sheng
Published: August 2020

Inlet / outlet of pumped storage power station is affected by bidirectional flow. Head is high and the force situation is more complicated. Simulation calculation based on finite element software ansys can simulate the force situation of inlet / outlet under different working conditions and analyze the distribution of stress in the stress cloud. So we can calculate structural reinforcement of inlet / outlet according to stress cloud. This calculation method can meet the use requirements of the structure.
The Disaster Mechanism And Stability Evaluation Of Hanhe Landslide
Authors: Si-Yi Jiang , Hai-Liang Li
Published: August 2020

Base on the treatment project Han he landslide, the mechanism of rainfall-induced landslide was carried out. SRM was used to analyze the stability of the landslide in the natural state and the rain state. The influencing factors of the landslide and the safety and stability of the landslide were analyzed. The research results are as follow: (1) Han he landslide body is developed in Wu dong Huang dong kou Formation (∈h) mudstone and silty mudstone, so the rock is highly weathered and easily softened by water. (2) According to this survey and the stability calculation, it shows that the Han he landslide is in an unstable state during heavy rain, and the shallow landslide is in unstable state. The theoretical analysis is basically consistent with the numerical results. (3) Stress is on the front edge of the landslide concentrated in the dangerous area, the landslide may continue to slide, and the trailing edge steep wall may also gradually collapse on a small scale. It is recommended to improve the drainage system and treatment measures as soon as possible. The mechanism of the landslide can provide engineering reference for the treatment and prevention of similar landslides.
Dynamic Buckling Characteristics of Elastic Shell under Torsional Deformation
Authors: Zhang WX , Hu XW
Published: August 2020

In order to solve the dynamic buckling problem of elastic cylindrical shell under torsional impact, the original and dual variables of the problem are constructed by means of the energy of the system, and the Hamiltonian system of the system is established. According to the characteristics of Hamiltonian regular equation and symplectic space, the initial boundary value problem of partial differential equation is transformed into an algebraic equation problem by using the boundary conditions and compatibility conditions expressed by dual variables, and the analytical expressions of symplectic eigenvalues and eigensolutions are obtained.
A Numerical Computation Method on Plastic Collapse Theorem
Authors: Zhang WX , Yang LM
Published: August 2020

Plastic material refers to the material with plasticity under normal temperature and static load. This kind of material has strong impact resistance and vibration resistance, and its tensile strength is usually higher than that of brittle materials, so plastic materials are generally used to bear tensile force. In this paper, we will introduce some classical plastic collapse theorems, which have been widely used to evaluate the forming process of concrete and determine the structure and soil foundation of the maximum bearing capacity for many years.
Papkovitch Neuber Type Solutions for Viscoelasticity
Authors: Zhang WX , Yang LM
Published: August 2020

For viscoelastic problems, Saint Venant solution can only satisfy the boundary conditions in the mean sense, while the local effect solution describes the stress and deformation in the local area near the load. In many practical problems, we only care about the effect of load on the whole material and structure, and the effect of local effect solution is often ignored. However, for some special cases, such as the cantilever beam with free end under bending moment, the stress at the fixed end is not uniformly distributed due to the restriction of displacement conditions, especially the stress at the upper and lower edges is far greater than the average stress on the cross section, so the local solution plays an important role.
Effect of Tamping Energy on the Reinforcement of a High Embankment Filled with Soil-Rock
Authors: Hou Licheng , Yang Guangqing , Jin Jing , Lu Huali , Zhang Ouyang
Published: August 2020

Through dynamic compaction tests with tamping energies of 1500, 2000, and 2500 kN•m of an embankment section in the PingShan–ZanHuang Expressway, the compression deformation behavior of the tamping settlement, soil deformation around the tamping rammer, consolidation depth, and dynamic stress of dynamic compaction were comprehensively tested. Comparative analyses of field data under three different tamping energies suggested that the optimal tamping energy, number of strikes, and vertical effective tamping depth for this embankment are 2000 kN•m, six, and 5 m, respectively. The field test data proving that dynamic compaction has a significant effect on this embankment.
The Consistency of the Cd Content in Lands and Oceans
Authors: Yang Dongfang , Yang Danfeng , Wang Qi , Zhang Longlei , Li Haixia
Published: August 2020

Based on the data from May, August, and October 1992, the Cd content in the Jiaozhou Bay waters varied from 0.11 to 1.53μg/L, up to the water quality standards of Class I and II seawater. This indicates that the water quality of the entire bay was slightly or not polluted by Cd during this period. In May, the variation of the Cd content in the bay ranged from 0.23 to1.53μg/L, more specifically, the Cd content reached a relatively high level of 1.00-1.53μg/L in the offshore waters near the estuary of Dagu River, Loushan River, Licun River and Haibo River and offshore waters of the north of the bay, leading to a mild contamination, while other waters in the bay were not polluted by the Cd content at all. In August, the variation of Cd content in the bay ranged from 0.11 to 1.11μg/L, more specifically, the Cd content hit the record high of 1.11μg/L in the offshore waters near the estuary of Dagu River and in the waters of the south of the bay mouth, making the waters polluted slightly, while other waters in the bay were not polluted by the Cd content at all. In October, the variation of the Cd content in the bay ranged from 0.12 to 1.11μg/L, more specifically, the Cd content reached a relatively high level of 1.04-1.11μg/L in the offshore waters near the estuary of Loushan River and Licun River, leading to mild contamination, while other waters in the bay were not polluted by the Cd content at all. There are three sources of the Cd content in the Jiaozhou Bay waters: rivers, main sea currents and surface runoff. In other words, these are three ways to transport the Cd content. In these ways, 0.96-1.53μg/L, 1.11μg/L and 1.10μg/L of Cd content are transported respectively. In this regard, the order from the largest to smallest of Cd content delivery is as follows: rivers, main sea currents and surface runoff. The Cd content transported by surface runoff is very close to that transported by main sea currents, indicating that the Cd content emitted by humans to land is consistent with that released to the oceans. Besides, the Cd content transported by the three sources is higher than or close to 1.00μg/L, suggesting that both lands and oceans are mildly polluted by the Cd content.
Analysis of the influence of reservoir regulation on the multi-scale periodic effect of runoff time series
Authors: Chen Yubin , Zhang Xiao , Li Jiqiong , Yan Bo , Chen Qihui , Xu Bin , Yao Liqiang
Published: August 2020

The periodic effect of runoff time series is a basic characteristic that reflects the change law of river hydrological situation. In order to reveal the influence of power station regulation on the periodic change of runoff process, the Gangkouwan Station, the controlling reservoir of the Shuiyangjiang River, was taken as the object in this article, based on the Morlet wavelet analysis technique, the influence of the reservoir on the periodic characteristics of natural runoff was analyzed and the influence of the reservoir on the periodic effect of runoff process of downstream channel on different time scales was revealed. The results show that the Gangkouwan Station significantly affects the periodic change of runoff on the 1-year, 4-month and 1-day scales, and among them, periodic change on the 1-day scale shows change law of day night alternative wetness-dryness.
Evaluation of river hydrological regime changes under the influence of Gangkouwan Reservoir
Authors: Yan Bo , Li Jiqiong , Liu Yanyi , Zhang Xiao , Yin Zhengjie , Cheng Weishuai
Published: August 2020

The construction of the reservoir has met human needs to a certain extent, but it has caused serious threats to river ecosystems, especially for the hydrological regime. In order to deepen the understanding of the impact of the reservoir, this paper introduces the Indicators of Hydrologic Alteration (IHA) method, constructs an indicator system that describes the changes in hydrological regime, and uses the Range of Variability Approach (RVA) to quantitatively evaluate the changes of 5 groups of 33 indexes after the construction of Gangkouwan Reservoir, thus realizing the quantitative change of the river hydrological regime. The results show that the Gangkouwan Reservoir affects the frequency and duration of high and low pulses highly, as well as in rate and frequency of water condition changes, and the integral change degree of hydrological regime is moderate.
Parametric Influences of Stability and Settlement Pattern of Embankment on Slope Foundation
Authors: Zhang Ouyang , Yang Guangqing , Zhao Yunfei , Lu Huali , Hou Licheng
Published: August 2020

Building a subgrade on the slope foundation is common for highway constructions in China. Under different hydrogeological conditions, the stability and differential settlement are the main problems for the construction of the subgrade. In order to study the parameters that influence the stability and deformation of subgrade, based on the cross-section of a mountainous region highway, those simulations were conducted to study the influence of subgrade height, subgrade width, embankment slope angle, and slope foundation angle on the stability and pattern of embankment. The results showed that the allowable filling height is 15 m; otherwise, there is a large risk of the slope sliding. Further, it was found that the maximum vertical deformation on the right shoulder of the embankment increases with an increase in the angles of the slope of the foundation. These results provide references for future highway constructions and design works in mountainous areas.
Research on the Collaborative Running Mechanism Oriented to Reverse Designing Services of Engineering Projects Based on Revit
Authors: Hong Jing
Published: August 2020

With the application and promotion of BIM technology in the field of building construction, the role and position of construction companies in adopting BIM technology to serve building construction activities is becoming increasingly important. Due to the unidirectional nature of the current BIM technology resource’s dominant behavior, the 3D modeling design, involved in the visual display of BIM technology, is mainly undertaken by construction companies, and it brings the asymmetry of building information’s management and interaction. Taking the application of Revit designing software as an example, in order to communicate with project designers and construction contractors on the interactive questions of reverse designing, and achieve the application effects of BIM technology resources, this paper designs the collaborative running model of engineering project’s BIM technology services from the perspective of building service collectivization, and expounds the collaborative running mechanism oriented to reverse designing services, so as to effectively serve the engineering project’s construction activities including bidding quotation, commencement preparation, construction process and completion and delivery.
Study on the reservoir dam slope stability considering the effect of seepage
Authors: Zhang Yiwen , Zhang Xiwen , Wang Zhen , Zhu Weidong
Published: August 2020

Water conservancy dam plays a significant role in flood control, power generation, shipping, irrigation, aquaculture, tourism, urban water supply and so on. The stability of the dam is extremely important in the engineering design and research processes. Based on the basic principles of finite difference and strength reduction methods, the software of FLAC3D is adopted to analyze the stability of the dam, considering the seepage state, the reservoir water level height and the seepage coefficient of the dam body. The results show that with the increase of the reservoir water level, the seepage behavior of the dam body is more obvious, and the horizontal displacement of the dam increases, while the dam slip safety factor is reduced. With the increase of the seepage coefficient of the dam body, the seepage discharge at the dam foot increases linearly, and the stability of the dam body decreases obviously. The seepage of dam foundation and dam slope stability is evaluated in this research. It is found that the reservoir water level and the dam body permeability are the important factors affecting the dam slope stability, so it is necessary to enhance the anti-seepage measures during the dam design and construction.
Research on the Influence of Near-Fault Round Motion Pulse Characteristics on Seismic Response of Base-Isolated Structures
Authors: Wang Yanan , Liu Yonghui , Wang Hairong
Published: August 2020

The time-frequency distribution of near-fault pulsed ground motion is different from that of ordinary ground motion because of its long period, short duration and high energy acceleration pulse effect, which has a significant influence on the structure with long natural vibration period, such as isolated structure. In this paper, the pulse characteristics of near-fault seismic records and their influence on the seismic response of isolated layer and superstructure are studied by selecting near-fault pulsed seismic records and far-field common seismic records as external excitation. The results show that compared with the far-field ordinary seismic waves, the 3D Hilbert amplitude spectrum of near-fault pulsed seismic waves is distributed in the low frequency region and the middle and late time domain, and the amplitude is also larger. The first natural vibration frequency of the isolated structure is located at the peak of the power spectrum of the near fault pulse wave, which makes the seismic response of the isolated structure in the near fault pulse type seismic record obviously larger than that in the far field common seismic record. The intensity indexes Sa(T1) and Sd(T1) of near-fault pulsed ground motion are greater than those of ordinary ground motion. The relationship between them and structural seismic response should be studied in depth.
Noise Reduction Model of Blasting Seismic Wave Signal
Authors: Sun Miao , Wu Li , Yuan Qing , Zhou Yuchun , Ma Chenyang , Wang Yufeng
Published: August 2020

The existence of noise will make the results of time-frequency analysis of blasting seismic wave lack of authenticity. In order to obtain the real blasting vibration characteristics, a method based on the complementary ensemble empirical mode decomposition with adaptive noise and establishing objective function is proposed. The process of noise reduction is divided into three steps. Firstly, the noise signal is decomposed by the complete ensemble empirical mode decomposition with adaptive noise, and the noise reduction algorithm is established based on the intrinsic mode function obtained from the decomposition; secondly, the objective function considering the smoothness of the noise reduction algorithm and its correlation with the measured signal is established; finally, the algorithm corresponding to the optimal solution of the objective function is found, which is the noise reduction model of blasting seismic wave signal. The model is applied to the de-noising of blasting seismic signal, and the de-noising ability of the model is analyzed by the noise reduction error ratio. The analysis results show that the model can reduce the noise of the seismic monitoring signal with noise on the premise of fully preserving the real components of the blasting seismic signal.
Study on the Influence of Marine Environment Control on Industrial Structure Adjustment of Manufacturing Industry in Hainan Province
Authors: Wang Lin
Published: August 2020

In the background of Hainan Province, this paper analyzes the dual impacts of ocean environmental control on manufacturing industrial structure upgrading and pollution Industry shift. Our studies shows that there exists a positive “U” relationship between marine environmental remediation and pollution industry migrate, industrial structure promotion. According to these two break points, the impact of ocean environmental protection on Hainan’s industrial structure regulation can be classified into the following periods: double inhibition of shift and promotion, priority of transfer and twofold promotion of shift and upgrading. Hainan is in the stage of double inhibition. Besides, in the impact of ocean environmental control on manufacturing structure upgrading, technological innovation has intermediary effects in command control, economic incentives, chemical oxygen demand and so on. Yer, this influence does not show significance in the case of cyanide regulations and ammonia nitrogen.
Study on the uneven distribution of vertical space humidity in a rocket testing workshop
Authors: Gu Yufei , Chen Shaojiang , Zhang Lijun , Li Zengguang , Yang Degang
Published: August 2020

In view of the problem of inconsistent air-conditioning delivery and uneven distribution of vertical space humidity in a rocket testworkshop at a coastal launch site, this paper analyzes the cause and mechanism of the problem based on the characteristics of high space air distribution, test plant structure and air-conditioning system. And puts forward the specific measures such as adjusting high-rise space air delivery target, optimizing the air-conditioning control strategy and improving the unit’s dehumidification capacity. These measures provide support for the solution of the problem and the optimal design and transformation of air-conditioning.
CFD simulation of the airflow uniformity in the plant factory
Authors: Fan Ruiqi , Liu Huan , Zhou Shenghan , He Zhongqun , Zhang Xin , Liu Ke , Wang Jinxiao , Yang Qichang , Zheng Yangxia , Lu Wei
Published: August 2020

The growth of horticultural crops is directly affected by the airflow environment in plant factories. In this experiment, a three-dimensional model was established for an indoor artificial light plant factory using computational fluid dynamics (CFD) to simulate the airflow field distribution in the plant factory, the measured value and the simulated value of air velocity were in good agreement, only 10% of the cultivation area was in the range of suitable growth air velocity. The optimization design of airflow field in the plant factory will be developed.
Analysis of Lightning Protection and Grounding Effect of Shared Iron Tower
Authors: Xiaopo Mao , Yaodong Zhang , Xueming Zhou , Zhiqiang Feng , Zeqi Huang , Xiang Ren , Tianru Shi , Jianjin Fu , Junjie Huang
Published: August 2020

By analyzing the lightning protection and grounding requirements of the respective systems of the communication base station and the power tower, the impact of the towers on their respective systems is analyzed. By establishing a simulation calculation model of the shared tower’s grounding grid, a mature algorithm is used to analyze the current distribution of the typical shared tower. And ground potential distribution, so as to obtain the degree of influence of the equipment when the respective system is struck by lightning. According to the impact, the lightning protection grounding technical requirements and common scheme of the shared iron tower are proposed.
Validity of Falling Ball Tester for Measuring Dynamic Elastic Modulus of Soil Subgrade Modulus of Highway
Authors: Xue Yingqi , Wang Luwan , Han Xiaokun , Wang Mengjie
Published: August 2020

The deformation characteristics of geotechnical materials are very important for improving the safety of highways. To determine the reliability and detection accuracy of the falling ball tester, the paper uses standard method and falling ball tester to measure the dynamic elastic modulus of standard components, PPR. The theoretical result is obtained by measuring the dynamic elastic modulus of the one-dimensional member with the single-side reflection method. To calculate the Poisson’s ratio, the transmission method is used to measure the P wave velocity of PPR that is 3 dimensional. In the falling ball tests, two excitation hammers with a diameter of 0.05m and 0.06m are used to measure the dynamic elastic modulus of PPR. By comparing the theoretical results with the values obtained by D50 and D60, it is found that more accurate results can be obtained by D60.
THE SIMULATION OF THE STEADY-STATE CONDITIONS OF ALUMINIUM DIRECT-CHILL CASTING
Authors: Molnar Daniel , Karpati Viktor , Budavari Imre
Published: August 2020

In this research, the simulation of aluminium direct-chill casting has been achieved focused on the fluid flow and thermal conditions. Control Volume Method is used applying the NovaFlow&Solid simulation software and the JMatPro software was used for the calculation of the material properties. 6 ingot geometries were examined using 4 commercial alloys. A hybrid method is developed for the calculation of the material properties and as a result, the temperature profiles and the liquid phase is analysed.
The Effect of Primary Phase Grain Refinement of Al-Si alloys on heat cracking
Authors: Bubenko M. , Molnar D. , Monika T. , Fegyverneki Gy.
Published: August 2020

In this research thermal analysis was carried out for different alloys which use for gravity die cast cylinder heads. The experiments were implemented under industrial conditions. The aim was to examine the effect of the small amount of supplementary grain refining pre-alloy on primary crystallization for hot-crackings. Different evaluating methods of thermal analysis were tested and compared. Results proved that the dosing small amount of grain refining alloy is favorable in the foundry production practice.
Investigation of the formability of polymeric elements in different software environments for the automotive industry
Authors: Zoltán Kovács Péter , Tóka Bence
Published: August 2020

Market-leading injection molding simulation software enables product designers, designers, injection molding tool manufacturers to predict the outcome of their work, making injection molding technology and end product quality much more reliable. This article describes how Moldex3D, with its advanced networking and computational mechanism helps simulate injection molding processes across multiple application areas. In addition, it optimizes product design and manufacturability, thus shortening the time to reach the market and maximizing the return on investment (ROI) of the product.
Detection of neutron irradiaton induced degradation of reactor steel by magnetic method
Authors: Vértesy G , Gasparics A , Uytdenhouwen I , Szenthe I , Gillemot F , Chaouadi R
Published: August 2020

A novel nondestructive method, based on step by step measurement of minor magnetic hysteresis loops was used to determine the neutron irradiation induced degradation of nuclear reactor pressure vessel steel material. This method is called Magnetic Adaptive Testing (MAT), and two types of reactor steel material were investigated: base material type 22NiMoCr37 and weld material type 18MND5. Charpy geometry samples were irradiated by neutrons at the BR2 in SCK•CEN. The neutron irradiation generated structural changes in the material. As a result of our measurement, it was shown that this degradation could be detected by MAT measurements. Charpy impact tests were also done on the investigated samples and the results of these measurement were compared with the nondestructively determined magnetic quantities. It was shown that a closely linear correlation existed between the ductile-to-brittle transition temperature (DBTT) and MAT parameters.
Semi-continuous casting and microstructure investigation of the AlSi12 alloy
Authors: Kazup Agota , Karpati Viktor , Hegedus Balazs , Gacsi Zoltan
Published: August 2020

Semi-continuously cast AlSi12 alloy was investigated by our research group at the University of Miskolc in the Institute of Physical Metallurgy, Metalforming and Nanotechnology under laboratory condition. Our goal was to define correlation and tendency between casting parameters and solidified microstructures. The examined alloy is used as filler material, thus cover soldering technology and exchangers are made from it, like car coolers, radiators, air conditioners. During the investigation optical microscope was used for sight of ingot microstructure, secondary dendrite arm spacing was measured in this way and even the amount of primary α-phase.
Fracture mechanical analyses of high strength steels applying experiments and simulation
Authors: Koncsik Zs , Lukács Zs
Published: August 2020

The paper contains information about the experimental and simulation test results of thermomechanically rolled high strength steel. The S960TM material grade was produced by a modern technological process, which provide longer estimated life time, better performance, and due to higher strength enable smaller applied wall thickness, which require less welding activity. The only disadvantage of this material grade is that they can contain material discontinuities in their microstructure. The characterisation of the response of these materials against load can be analysed by fracture mechanical investigation. Fracture mechanical experiments were carried out with three-point bending method, calculating fracture toughness value of crack-tip opening displacement (CTOD). To reduce the complicated real experiment in fracture mechanics, the simulation possibility of fracture mechanical behaviour of the investigated material was applied, using DEFORM software, which gave an acceptable narrowing to the measured phenomenon.
Measurement possibilities of water content in polyamide
Authors: Terjék D V , Kókai E
Published: August 2020

Water content of polyamide is an important parameter, because it has great effect on the elongation, toughness and impact strength. The aim of our research was to determine moisture in polyamide-6 and polyamide-6.6 granules with different pretreatment of the base material. The specimens were prepared and conditioned in distilled water or non-conditioned. Thermogravimetric analysis, moisture analysis and coulometric Karl-Fisher indirect titration were used for the determination of humidity content. We used polyamide granules and flakes, and polyamide nanocomposites filled with montmorillonite for the water content measurements. First, we compared the technics and chose the most applicable to measure the water content in the samples, and made further measurement of polyamide nanocomposites.
Investigation of the tribological properties of nano-scaled ZrO2 and CuO additive in automotive lubricants
Authors: Tóth Á. D. , Knaup J.
Published: August 2020

To improve the fuel efficiency and the lifetime of the internal combustion engines, the lubricants and their additives have to be developed further. One of the possible future engines lubricants can be the nano-sized ceramic particles, which can provide positive tribological properties also in the presence of non-metallic surface materials. This paper presents the results of investigations with the help of ZrO2 and CuO nano-sized ceramic particles. To define the tribological properties of these additives, lubricant samples with different additive-concentrations were prepared and tribologically analysed. The frictional losses of these lubricant samples were analysed by a ball-on-disk sliding friction machine. The worn surface on the test specimens was analysed by different high-resolution microscopes. To define the functional mechanisms of the nano-additives, the worn surfaces were investigated by high resolution scanning electron microscopes. The ZrO2 additive has experimentally shown an excellent wear reduction property (over 40% wear reduction compared with the neat Group 3 base oil) at the optimum mixing concentration of 0.4wt%. Both frictional and wear reduction properties could be determined at the application of CuO additive (15-15% friction coefficient and wear scar diameter reduction) at its optimum concentration (0.5wt%). A copper-yellow layer can be seen on the worn surface of the disc specimens with CuO, which indicates the mechanism of chemical transformation to elementary copper from the cupric-oxide nanoparticle and this elementary copper can be melted on the surface, because of the applied high temperature and high loads during the experiments.
Semi-continuous casting of aluminium alloys
Authors: Karpati Viktor , Hegedus Balazs , Kazup Agota , Ferenczi Tibor , Molnar Daniel , Gacsi Zoltan
Published: August 2020

The target of our experiments is to simulate a complex production process under laboratory conditions. An industrial aluminium production line is examined using a semi-continuous casting device, running preliminary and trial experiments to find the optimal technological parameters for the physical simulation. Be the determination of the correct casting parameters the technological industrial process can be optimized.
Modelling of segregation during injection moulding
Authors: Fris Dorottya Réka , Szabó Ferenc
Published: August 2020

The goal of this study is to establish a proper simulation model of segregation, a phenomenon which causes inhomogeneity in filled polymer products. We did preliminary research, in which we calcinated injection moulded specimens of 80 mm x 80 mm x 2 mm, with 75 μm, 125 μm and 250 μm glass beads with 10 m%, 25 m% and 40 m% filler rates. According to preliminary simulations, the boundary conditions were set and an EDEM model was created.
Characterisation of Inhomogeneous Plastic Deformation of AlMg Sheet Metals During Tensile Tests
Authors: Szalai Sz , Harangozó D , Czinege I
Published: August 2020

The Portrevin-Le-Chatelier (PLC) effect was analysed quantitatively in the selected AlMg alloys with Mg-content between 2,8-4,6%. The propagation and characteristics of PLC bands were detected by digital image correlation (DIC) technique and the parameters of the bands were evaluated from strain distributions of tensile test specimens. In parallel, stress-strain curves were analysed evaluating stress serrations. The numerically defined parameters of changes in stress and strain were used for characterising the PLC effect on the behaviour of different sheet metals. General statements of literature were numerically proven for the tested materials and the effect of magnesium content on stress amplitude was analysed in detail.