bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modelling of dielectric properties of non-linear optic materials based on linear molecules
Authors: Bulatov V Yu , Smirnov M B , Sukhomlinov S V 
Published: March 2020

Abstract
Dependence of polarizability (LP) and hyperpolarizability (HP) of linear oligomers on the number of monomers in the chain is analyzed. A critical review of previous studies revealed two main issues. Firstly, the specific (per one chain unit) values of both LP and HP monotonously increase along with the chain length, and secondly, both dependencies approach the limit values in sufficiently long chains. A model describing such behavior is proposed. The model parameters are LP and HP of an isolated chain unit and a cross-term, which couples the dipole moments of neighboring units. These parameters have a clear physical meaning. It is shown that the theoretical predictions provided by the model agree well both with the results of accurate quantum-mechanical calculations and with experimental data.
Integrated food assurance system
Authors: Fajri M 
Published: March 2020

Abstract
A good food is a food which is good at quality, safe and halal. A system is needed to ensure that quality, the safety, and its halal labeled. In Indonesia, quality assurance system, safety assurance system, and halal assurance system have not been integrated into one system. A food assurance certification in the form of GMP certificate, HACCP certificate, and also Halal certificate is carried out individually by the authorized institution (certification body, LPPOM MUI and BPOM). An individual certification costs a separate fee. This insignificant cost is certainly burdensome for small and medium enterprises (SMEs) which have a limited fund. This will certainly hamper the development of Food SMEs to compete in national or international market. The aim of this study was to produce recommedation for an integrated food quality, safety and halal assurance system. The research method applied was review of the requirements contained in ISO 9001, ISO 22000 and HAS 23000. The quality assurance system refers to ISO 9001 and GMP, the safety assurance system refers to ISO 22000 and HACCP and the halal assurance system refers to HAS 23000. The integrated system is expected to reduce cost of food assurance certification, especially for Food SMEs.
Effect of Groove Setting for Additional Reinforcement on the Seismic Performance of Precast Shear Wall-slab Joint with No Outer Longitudinal Reinforcement
Authors: Wang Minling , Guo Haishan , Qian Hongliang , Wang Dongyan , Wang Huajie 
Published: March 2020

Abstract
The superimposed slab with no outer longitudinal reinforcement at the bottom is a new slab for the assembled shear wall structure, which has a simple detailing and is easier to be transported. To improve the joint performance, the additional reinforcements were often used, but the effect of groove setting at the position of contact between the precast slab and casting slab has not been known clearly. A cyclic loading test was designed and conducted to investigate the influence of groove setting to seismic performance of precast shear wall-slab joint with no outer longitudinal reinforcement. The hysteretic curves and key indexes for the seismic performance of these joints were gained. Also, the influence rule of groove setting to the seismic performance of the joint was studied, and the result showed that groove setting could improve the seismic performance of the joint effectively.
Experimental Study on CFRP Strengthening Hollow Wooden Column and Strengthening Effect
Authors: Chen Qiang , Chen Chaoyun , Yu Fang , Shen Bo , Tan Cong 
Published: March 2020

Abstract
Historically, timber, as a main construction material has been applied in the field of construction, timber structure is building in the middle part of a very large proportion, but the wood will happen after a long time after the use of decayed, cracking, crispy and other diseases, result in loss of structure strength and buckling problems of influence continue to use, has quite a number of ancient architecture of China is a wooden structure, at the same time many wooden structure has important historical significance and research value, at the same time, for building a timber of strengthening the study of the problems of the less, to solve the problem of building a timber reinforcement, In this paper, a model is proposed to improve the bearing capacity of the damaged wooden columns by reinforcing them with carbon fiber sheets to limit the lateral displacement. In the test, three pillars with basically the same materials, structural dimensions and processing methods were used to repair and reinforce the damaged logs, and the bearing capacity of the hollow columns under axial compression was tested. The experimental results show that the bearing capacity of the building columns strengthened by CFRP is significantly increased: the average ultimate bearing capacity is 1003.33kn, the lateral displacement is reduced to a certain extent, and brittle failure occurs, which proves that the research results provide a certain practical and theoretical reference for the field of building column reinforcement.
Comparative Analysis of the Structure and Construction of the Central-Column Drum Tower and the “Hui” Type Drum Tower of Dong Nationality in the Southeast of Guizhou Province
Authors: Pu Shuang , Fan Langbo , Liang Bo , Huang Chuanteng 
Published: March 2020

Abstract
Dong is a minority in China. The drum tower is the representative architecture of Dong culture and also is the traditional cultural symbol of the region of Southeast of Guizhou Province. This paper mainly compares the structure and construction features of the central-column drum tower and the “Hui” type drum tower, taking the Shudong drum tower in Liping County and the Zengchong drum tower in Congjiang County as examples. Both of the drum towers are in the Southeast of Guizhou Province. By analyzing the drum tower classification, planar form, column layout, structural components and construction technique, the differences between the two types of drum towers in the structure and construction were compared. This article could contribute to understand the drum tower in a clearer and more intuitive way.
Parametric static analysis of a new type of fabricated plate grillard thin shell roof structure
Authors: Liu Kai , Wu Xuewen , Zhao Xueying , Hong Cheng , Yi Shuai 
Published: March 2020

Abstract
The new fabricated slab ribbed shell roof structure is a new structure based on a large-span steel-concrete composite thin shell roof. An assembly unit composed of a thin-walled steel ribbed plate, a base plate, and concrete provided with bolt holes, and a plate-grid thin shell roof structure formed by the assembling and connecting assembly units. Considering the influence of the structure’s rise span ratio, five groups of rise span ratios were used for finite element analysis and compared with single-layer cylindrical reticulated shells. The analysis shows that the mean value of the ultimate load of the new prefabricated panel latticed thin shell roof structure is increased by 5.3% on average compared with the single-layer cylindrical reticulated shell structure. When the rise span ratio is 1/5, the structure has the largest stiffness and the smallest deformation; when the rise span ratio exceeds 1/5, the growth trend in the ultimate load that the structure can withstand will become smoother, and the average maximum displacement will decrease by 4.3% compared with the single-layer cylindrical reticulated shell, which shows that the grid lattice structure has better stiffness.
Parameter Analysis for Seismic Performance of Prestressed Fabricated Frame Joint Based on Opensees
Authors: Wang Chenchen , Xu Hongjun , Zhang Jingdong 
Published: March 2020

Abstract
Aiming at the characteristics of prestressed fabricated frame joints, proposes a finite element modelling method based on OpenSees. Then, verify the correctness of the finite element model combining experiment of prestressed fabricated frame structure. it shows that the proposed joint finite element model can predict the seismic performance of the structure accurately. Detailed parameter analysis is performed to study the general law of seismic performance evolution of joint from five aspects, namely, prestressed tendon area, energy-dissipating tendon area, concrete strength, axial compression ratio, and tensile control stress. Analysis results show that prestressed tendon area, axial compression ratio and tensile control stress should be constrained to some extent, otherwise the performance of joint would deteriorate.
Experimental Study on Seismic Behavior of K-type Eccentrically Braced Steel Frame with Semi-rigid Joints
Authors: Shi Qiang , Su Jin , Wang Xinwu , Shilin Yan 
Published: March 2020

Abstract
In order to study how different connection types and floor height affect the seismic behavior of eccentrically braced steel frame, there has been processing 4 pseudo-static tests for eccentrically-braced steel frame, including two one-layer specimen and two three-layer specimen. The seismic behavior of the specimen has been analyzed according to hysteresis curve, carrying capacity, stiffness degeneration, ductility, and energy dissipation ability etc. The experiments’ results show that the connection types have greater impact on seismic behavior, adopting specimen destruction model of high-strength bolts connection as beam segment end-plate weld or web fracture. The rest of components do not appear significant yielding deformation and crack, which caters for post-earthquake restoration and replacement of energy dissipation beam segment. The carrying capacity of high-strength bolts connection specimen is slightly lower than welded connection specimen, but the ductility of the former is far beyond the welded specimen. Because of the slippage between components, hysteresis curves of bolts-connected eccentric braced steel frame structure appear to have pinned phenomenon with various degrees.
Reliability Analysis and Safety Improvement Measures Research of Transmission Line Tower-Line Structure under Ice-Wind Conditions
Authors: Shi Tianru , Hu Danhui , Zhou Xueming , Zhang Yaodong , Feng Zhiqiang 
Published: March 2020

Abstract
The tower-line structure system of transmission line is a whole composed of tower structure, insulator, fittings and grounding wire and other components or subsystems. Its reliable operation is of great significance to the safe and stable operation of power system. In this paper, the reliability analysis method of transmission line tower-line structure system under the combination of ice and wind is modeled. Firstly, the reliability index of pole-tower structure, insulator, fittings and grounding wire is calculated by checking point method of first-order second-moment method. Then, the reliability calculation method of series structure system is used to calculate pole-tower structure, insulator, fittings and grounding wire. Finally, taking a straight tower and tension tower as examples, the system reliability indices of pole-tower structure, insulator, fittings and ground wire under ice-wind combination are calculated and analyzed, which can provide reference and guidance for disaster prevention of transmission lines.
Monitoring Construction Progress Based on 4D BIM Technology
Authors: Chen Jingjing , Wu Juan , Qu Yan 
Published: March 2020

Abstract
With the development of building information model (BIM), the new theory and technology of project management are developing continuously. The purpose of this project is to combine BIM and 4D technology on the basis of existing construction management theory and intelligent construction concept, and effectively solve the “information island” phenomenon in the construction process. Realize the optimization of construction progress and real-time perception and control of actual construction progress. Using database theory to study the innovation of this technology will enrich the theory and method of project process management and promote the research and application of new information technology in construction industry. Using new methods to improve the level of project management is conducive to improving the construction efficiency of the project.
A Comparison of the Mechanical Vibration Evaluation Standards of Steam Turbine Generator Foundation
Authors: Zhang Qian , Chen Jie , Lu Zhicheng 
Published: March 2020

Abstract
In the paper, the basic design standards (GB50040-96 and ISO10816-2) of various mainstream steam turbine generators at home and abroad were reviewed and their similarities and differences were analyzed in detail. Moreover, the paper also provides the vibration test data on the disturbing points of the foundation and corresponding bearing bracket of three typical 600MW turbine generator units during normal operation so as to search for the relationship between vibration of bearing brackets and vibration of the foundation. The safety coefficient of the chosen foundations using GB50040-96 and ISO10816-2 were also given to compare the severity of each standard. It is hoped to provide designers with accurate grasp of various standards.
An Improved Model on Pipe Soil Vertical Interaction
Authors: Li Kai , Qian Jing , Lei Chengbin 
Published: March 2020

Abstract
The existing three typical models on pipe soil vertical interaction mainly consist of RQ model, AB model and ABY model. Without exception, each model comprises four fundamental phases of pipe soil interaction: no contact, initial penetration, uplift and re-penetration. Both RQ model and AB model can describe the above four phases, however, they give no idea of the cyclic weakening effect on soil mass. For ABY model, it can reflect the soil mass weakening changes and the pipeline slotting process, yet it may greatly underestimate the soil mass strength and then overestimate the buried depth of pipelines. This thesis proposes an improved model on pipe soil interaction. It adopts a more rational method to consider the weakening effect of soil strength. Furthermore, this model can take the pipeline slotting effect into account. Therefore, it is an optimized model to reflect the dynamic buried-depth change in the process of interaction between pipeline and soil mass.
Research status of distinct element method particle flow analysis method and its application in deep sea core drilling
Authors: Ren Yugang , Yu Kaiben , Zheng Sen , Yang Lei , Qi Haibin , Zhang Jianhua , Liu Yanjun 
Published: March 2020

Abstract
Discrete element particle flow method (DEM) is a numerical simulation method aimed at the discontinuity, non-uniformity and non-linear mechanical properties of rock mass. It analyzes the damage and fracture mechanism of materials and structures from the perspective of micromechanics. It has been widely applied in different disciplines and engineering fields. This paper firstly introduces the basic principle of discrete element particle method and its calculation theory, the second review conducted extensive research, the method of this paper expounds in detail the progress at home and abroad, and analyses the application in the field of rock drilling medium, the final mechanical properties of the deep core drilling analysis apply to imagine thinking and research.
Numerical Simulation Study on Fully-Mechanized Top Coal Caving in Extra-Thick Coal Seam
Authors: Lei Wu-lin , Li Xingliang , Chen Yanfeng , Duan Weihua , Chen Jianhua 
Published: March 2020

Abstract
Three working face of a mine 250203, 250205, 250206 as the research object, the establishment of a geomechanical model according to the actual situation of the project. FLAC3D using numerical simulation method to analyze section coal pillar width in 20 m, 10 m, when 0 m, Face sequential mining process key strata caving stride, the instability from the pillar damage induced rock burst dangerous. The results showed that: (1) the reasonable width of coal pillars can effectively reduce the occurrence of rock burst; (2) a composite key layer of destruction and instability is the main mine rock burst occurred.
Prediction of V
s30 in Datong Basin and Amplification Effect of Site Ground Motion Based on Typical Geological Characteristics Analysis
Authors: Zhang Longfei 
Published: March 2020

Abstract
Shear wave velocity of soil layer is an important dynamic parameter, which is of great significance for site classification, determination of ground motion parameters and prediction of ground motion. Based on the analysis of shear wave velocity data of 1429 geological boreholes in Datong Basin, this paper studies the relationship between V
S and geological characteristics such as soil type, geological unit type, SPT blow number and compactness degree. Based on the correlation analysis of shear wave velocity ratio of soil, soil compactness coefficient and thickness of Quaternary upper overburden, this paper presents a soil V
S30 prediction model. The goodness of fit R
2 > 0.90 and the prediction accuracy is very high under the overall sample condition. Based on the abundant strong earthquake records and drilling information of KiK-net and K-net networks in Japan, V
S30 and site period T
S are selected as the two quantitative indexes of the amplification effect of site ground motion. The correlation between V
S30 and PGA amplification coefficient and site period T
S is established. The distribution characteristics of PGA amplification coefficient and site period T
S based on V
S30 distribution are given. The results show that the maximum values of PGA amplification coefficient and TS distribution characteristics of site period are consistent with the geological location of the earthquake swarm with M6.1 in 1989 in Datong Basin. It shows that the characteristics of the site ground motion effect estimated by V
S30 can indicate the occurrence of earthquakes. The occurrence of earthquakes is affected by active faults and local conditions of the site at the same time, which fully proves the feasibility of this research method and the accuracy of the research results. The shear wave velocity ratio and the soil compactness coefficient are proposed for the first time, and they are applied to the prediction of V
S30 with the thickness of the upper overburden of the quaternary system. This paper provides a good research idea for V
S30 prediction of non-shear wave velocity test site, study of amplification effect of site ground motion, study and judgment of earthquake location. The research results can provide important technical support for urban earthquake prevention and mitigation planning, large earthquake scenario construction, earthquake risk analysis, earthquake damage prediction and regional earthquake safety evaluation in Taiyuan Basin.
A New Method of Modeling Shield Tunnel in Mixed Strata Based on FISH Language
Authors: Qiu Yuefeng , Chen Jian , Yi Shun 
Published: March 2020

Abstract
In order to solve the problem specific to modeling shield tunnel in mixed strata with FLAC3D, a new method based on FISH language is proposed. By means of the new proposed method, the shield tunnel as well as the stratum inside and outside the tunnel are precisely modeled in FLAC3D. Compared with the traditional way, the new method in the paper is both convenient and accurate. Then the new method is proved to be reasonable through the numerical result of an instance. Consequently, the new method in the paper can be applied to further numerical analysis in FLAC3D.
Discussion on the Review and Outlook of Microbial Geotechnical Mineralization Technology
Authors: Lang Chaopeng , Li Mingdong , Dai Renhui , Pan Yaosen 
Published: March 2020

Abstract
Microbially Induced Calcite Precipitation (MICP) has grown up to be a hot topic in geotechnical engineering. MICP is a technology that controls and utilizes microbial reactions to produce calcium carbonate cement. It can be used to solve problems in geotechnical engineering, such as improving rock and soil strength, reducing permeability, treating the polluted soil. Microbial mineralization involves a series of biochemical reactions, and the curing process is of particular importance. Therefore, the curing effect of MICP is restricted and impacted by many factors. Built on the factors of microbial mineralized calcium carbonate reaction and microbial mineralization, the principles of urea hydrolysis, denitrification and sulfur reduction were summarized. The effects of air conditions, environmental factors, fiber addition amount, soil water content, and treatment solution concentration on microbial mineralization technology were analyzed. The conclusion is as follows: in the aerated state, the calcium carbonate content is the highest; the low urease concentration, the natural climatic temperature (the best in summer), the pH value between 7-9 produces the most calcium carbonate and the compressive strength is the largest; When soil fiber content is 3%-5%, MICP technology works best; the low concentration treatment liquid is more suitable for the MICP technology; the microbial mineralization technology is suitable for the sand, but it can also produce good effects for other complex soil.
Research on Fatigue Bending Stiffness Degradation of Prestressed Concrete Beams Considering Size Effect
Authors: Zhou Hongyu , Zhou Yun , Liu Yanan , Ma Quanzhou 
Published: March 2020

Abstract
Based on the fatigue damage development law and damage model of concrete, considering the crack propagation of ordinary steel bars and prestressed reinforcement under fatigue load, the residual useful section area of reinforcement was used to reflect the fatigue damage of steel bars. Further, we considered the correction coefficient of the size effect of concrete and steel bars and derived the formula for calculating the section stiffness of prestressed concrete beams of different sizes after fatigue damage. A multi-stage variable amplitude fatigue load test was carried out on prestressed concrete beams. The test results were analyzed, and the accuracy of the equation was verified based on experimental data. The results show that the stiffness degradation of prestressed concrete beams and the development of concrete damage under the multi-stage variable amplitude fatigue loading test have similar laws. According to the theoretical derivation formula, the deviation between the calculated results and the experimental results is small, which has reference value for the study of the fatigue bending stiffness degradation of prestressed beams considering the effect of size effect.
Experimental Investigation on the Behaviour of Non-reinforced Ultra-High Performance Concrete Slabs
Authors: Zheng Hui , Zhou Dongdong , Liao Zhenhao 
Published: March 2020

Abstract
Ultra-high-performance concrete (UHPC) is expected to provide solutions for the development of lightweight, high-strength, and rapid construction of concrete bridges due to its excellent material properties. In order to study the influence of steel fiber on the bending performance of non-reinforced UHPC (NR-UHPC) slabs, the bending failure test of 8 NR-UHPC slabs was completed with the steel fiber content as a parameter, and the failure mode, load-deflection, crack widths and load-strain curves of the test slabs were analyzed. The test results show that the destruction process of the NR-UHPC slabs can be divided into three stages: elastic stage, cracking stage and failure stage. The load-deflection curve and load-strain curve of the specimen with steel fiber content of 0.5%-1% change linearly during the elastic phase. In the elastic phase, the load-deflection curve and the load-strain curve of the test piece with a steel fiber content of 2%-3% were not smooth after the linearity begins; the strain of the UHPC slab was almost the same within 0-10 kN. However, as the load increased, the larger the amount of steel fiber was, the smaller the strain was, that is, the UHPC slab had good crack resistance. According to the regression analysis of test results at home and abroad, recommended design formulas for the bending bearing capacity of NR-UHPC slab were put forward, which tally well with the test results.