bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical computation for the impact of flow rate and rotational speed on the flow-induced noise of the centrifugal pump
Authors: Wang Yue , Song Bi Feng , Song Wen Ping , Ren Juan 
Published: December 2017

This paper adopted an indirect mixed method (computational fluid dynamics + boundary element method) based on computational fluid dynamics + Lighthill acoustic analogy theories to compute the flow field and flow-induced noise of the centrifugal pump, and experimentally verified the correctness of computational results. The pressure distribution of the centrifugal pump through an unsteady computation showed that there were obvious separation vortexes at the outlet of the centrifugal pump and pressure at the edge of impellers was obviously more than that of other parts. There were many peak noises on the sound pressure level curve at the outlet of the centrifugal pump. The sound pressure level gradually decreased with the increased frequency. However, sound pressure levels will be a stable value when the analyzed frequency was more than 3000 Hz. Sound pressures at the inlet and outlet of the centrifugal pump were relatively large. Sound pressures at the inlet pipeline gradually decreased from outside to inside and sound pressures of outlet pipeline gradually decreased from inside to outside. The structure of the centrifugal pump was not completely symmetrical, and the sound field was not symmetrical. In addition, the radiation noises in the external field at the inlet and outlet of the centrifugal pump were similar to the radiation of many point sound sources. Peak values of flow-induced noises at the outlet of the centrifugal pump were more than those at the inlet of the centrifugal pump under the working condition of different rotational speeds and flow rates. In the meanwhile, sound pressure levels at the inlet and outlet of the centrifugal pump did not show many differences in amplitudes when the rotational speed was small. When the rotational speed reached up to 3000 r/min, the sound pressure at inlet was more than that at outlet within 1500 Hz-4500 Hz. At many peak frequency points, peak noises at outlet were obviously more than those at inlet, which thus proved that fluid caused large pressure fluctuations due to the interaction between impellers and volutes after flowing through the centrifugal pump and flow-induced noises caused by pressure fluctuations were mainly reflected in blade frequency. The change of the rotational speed and flow rate would not only increase the flow-induced noise in the centrifugal pump, but also seriously affect the external radiation sound field of the centrifugal pump.
A novel MPP-NSGA algorithm and its application in optimization for radiated noises in the aircraft cabin
Authors: Li Jie , Liu Wei Xing , Zhang Yu Zhu , Zhang Ling , Li Shan Shan 
Published: December 2017

The paper used the AML method to compute transmission loss of aircraft panels and verifies correctness of the numerical simulation model by experimental test. Finally, this paper used an improved genetic algorithm to conduct a multi-objective optimization for the cabin noise. When the analyzed frequency is less than 250 Hz, transmission loss decreased rapidly with the increased analysis frequency, and decreased from the maximum 63.2 dB to 18.5 dB. Within 250 Hz-4000 Hz, the transmission loss gradually increased with the increased analysis frequency. At 250 Hz, the transmission loss had an obvious valley value. Sound radiation power was then computed based on boundary element method, and panel contribution analysis was conducted to find those panels which had an obvious impact on the cabin noise. Therefore, a multi-objective optimization was conducted on these panels and reinforced ribs. In order to further verify effectiveness of the MPP-NSGA method, it was compared with the traditional GA model and NSGA model. Optimization accuracy using MPP-NSGA model is increased, and optimization time is reduced. Through optimization with traditional GA method, the maximum sound power level decreased by 15.4 %, and the total sound power level decreased by 21.9 %. Through optimization with the NSGA method, the maximum sound power level decreased by 21.7 %, and the total sound power level decreased by 29.0 %. Through optimization with the MPP-NSGA method, the maximum sound power level decreased by 46.3 %, and the total sound power level decreased by 36.0 %. Therefore, compared with other two kinds of genetic algorithms, the MPP-NSGA method is obviously superior in noise optimization in the cabin. In the whole analysis frequency band, noise of the optimized cabin panel at each frequency point was smaller than that of the original structure, fully verifying feasibility of the optimization algorithm proposed in the paper. In addition, in the optimized structure, no panel made obvious contributions to the cabin noise, and each panel showed an equivalent contribution level. Transmission loss of the optimized cabin panel was obviously improved. However, the sound insulation valley still appeared at 250 Hz, but it was not so obvious like the original structure. After optimization, the sound insulation valley was 31.6 dB. The sound insulation valley of the original structure was 18.5 dB. Obviously, the sound insulation valley value of the optimized structure was increased by double compared with the original structure. This paper provided a valuable reference for noise reduction in the aircraft cabin.
Study on aerodynamic characteristics and running safety of two high-speed trains passing each other under crosswinds based on computer simulation technologies
Authors: Wu Hong , Zhou Zhi-jian 
Published: December 2017

With the continuously increased running speed of high-speed trains, aerodynamic problems become more and more obvious. Running safety of trains under crosswinds is a serious problem among numerous aerodynamic problems. Aiming at this problem, this paper combines computational fluid dynamics with multi-body dynamics to study aerodynamic characteristics and safety problems when the high-speed train is running under crosswinds. Based on fluid software FLUENT, this paper computes the flow field of two high-speed trains passing each other under crosswinds. Meanwhile, with combining the multi-body dynamic software SIMPACK with theories, the paper establishes a multi-body dynamic model of the high-speed train, and applies random aerodynamic loads which act on the high-speed train to this model. Impacts of aerodynamic forces (force moments) on aerodynamic characteristics and running safety of each train compartment in the open air are analyzed. Analyzed results show that: when two high-speed trains are passing each other at the same speed of 350 km/h and the crosswind speed is 15 m/s, maximum pressure fluctuations are at observation points near the lateral windows of the head train; aerodynamic forces and force moments of the head train are more than those of the mid-train and tail-train; the high-speed train still has a high safety performance under crosswinds, where the maximum derailment coefficient is 1.9, the reduction rate of the wheel load is 1.1 and the overturning coefficient is 0.98, all of which are smaller than the limit value. More comprehensive factors are considered by the computational model in this paper. It can be used as an effective method to study and evaluate the performance of two high-speed trains passing each other under crosswinds.
Seismic behavior of bifurcated concrete filled steel tube columns with a multi-cavity structure
Authors: Qiao Qiyun , Wu Haipeng , Cao Wanlin , Li Xiangyu , Yang Weibiao 
Published: December 2017

In order to meet the architecture and construction needs of high rise buildings, the special-shaped columns are becoming more and more widely used. In this study, cyclic tests on seven special-shaped bifurcated Concrete Filled Steel Tube (CFST) columns are carried out. Test variables are the column cross section types and the loading directions. The strength, ductility, hysteretic behavior, energy dissipation ability, failure modes and seismic mechanisms are analyzed. Test results show that: the cross-section type of the column is the main factor influencing the seismic behavior of the specimens. Compared with the basic cross section type, the strength, ductility and energy dissipation capacity of the strengthened cross section type all significantly increased. The cross sections with the inserted angle steel or circular steel tube have the best comprehensive seismic behavior. Also, the loading direction has a considerable influence on the seismic behavior. Compares with the short axis loading specimen C1-Y, the strength of the long axis specimen C1-X and 45° axis C1-Z increase by 92.5 % and 44.0 %, respectively, indicating that the differences in loading direction should be taken into consideration in the seismic design. Based on the test results, the FEM analysis are also carried out. The FEM results show a satisfactory agreement with experimental results. The concrete constitutive relationship and modelling method proposed is suitable for the simulation of special-shaped bifurcated CFST columns with multiple cavities.
The modal analysis of three-dimension gun barrel using isogeometric analysis and its application to optimization
Authors: Cheng Qingsi , Yang Guolai , Yu Chencheng , Sun Quanzhao 
Published: December 2017

In this paper, the Isogeometric Analysis (IGA) is applied to make the modal analysis for 3D gun barrel. The geometry of IGA is modeled by None-Uniform Rational B-Splines (NURBS) which is exact and smooth even at the coarsest mesh level. The first 9 natural frequencies were calculated respectively by IGA and traditional finite element method (ABAQUS), and compared with the test results. The maximum relative error between numerical value and experimental value is less than 3.6 % which verifies the feasibility of numerical model. Six different refinement schemes were analyzed to compare the computational accuracy and efficiency of IGA and ABAQUS. To achieve the credible results, the CPU time of ABAQUS is more than twice of IGA. On this basis, the IGA method is used for the structural shape optimization of gun barrel. The first natural frequency is increased by 6.96 % and the barrel mass is reduced by 4.9 %.
Active vibration isolation using a six-axis orthogonal vibration isolation platform with piezoelectric actuators
Authors: Wang Shuai , Chen Zhaobo , Jiao Yinghou , Liu Xiaoxiang 
Published: December 2017

Piezoelectric actuators (PEA) act an important role in active vibration control area due to the advantages of fast response, high output force, small size and light weight. A 6-axis orthogonal vibration isolation platform based on PEAs is designed, which satisfies the demands of heavy payload, small installation space and multi degree of freedom vibration isolation. The dynamic model of the six-axis orthogonal vibration isolation platform with PEAs is established using Newton-Euler method. With the layout of six PEAs around the axis of symmetry, the dynamic equations could be decoupled into two single-input-single-output (SISO) subsystems and two multi-input-multi-output (MIMO) subsystems. Based on the modal superposition method, the two MIMO subsystems are further decoupled. The control strategy for each SISO system is developed with LQR control method. To evaluate the effectiveness of the control method, the simulation and verification experiment are conducted. The simulation result and experimental data indicate that the decoupling control of the proposed six-axis orthogonal vibration isolation platform with piezoelectric actuators effectively reduces the vibration response of payload within the target frequency range of 20 Hz to 200 Hz.
DECONSTRUCTION OF TAX AMNESTY IN BASED ON PANCASILA VALUES: THE CASE OF INDONESIA
Authors: Darmayasa I Nyoman , Sudarma I Made , Achsin H.M. , Mulawarman Aji Dedi 
Published: December 2017

The main objective of this study is to deconstruct tax amnesty based on Indonesiaâ€™sÂ Principles (Pancasila) values. A post-modern paradigm is used to deconstructÂ current tax amnesty. The methodology used in this research is a combination ofÂ Derridaâ€™s deconstruction and Latifâ€™s thought on historicity, rationality, andÂ actuality. The results show that the initial design of tax amnesty is repatriation,Â which is inferior in the development of taxpayersâ€™ character. Materiality, selfinterest, and measurement object are tax amnesty logos. Religiosity, honesty,Â civility, and mutual cooperation are used in a reverse hierarchy of the beforeÂ mentioned tax amnesty logos. The result of deconstruction is tax amnesty based onÂ Pancasila in order to construct social justice.Tax amnesty is a current issue;Â however, only a limited number of research was dedicated on the philosophy of taxÂ amnesty law. The research offers new meaning to tax amnesty based on PancasilaÂ values which may encourage voluntary tax compliance.
FACTORS AFFECTING STOCK EXCHANGE INVESTMENT IN KURDISTAN
Authors: Anwar Kofand 
Published: December 2017

The purpose of this research is to examine the factors affecting stock exchangeÂ investment in Kurdistan and particularly in Erbil. Developing countries can alsoÂ make use of these markets to develop their economy, though this process could beÂ something new for some developing countries. The stock exchange investment isÂ often the choice for businesses seeking lucrative investment deals. As the placeÂ where monetary transactions are made, investors usually take their chances in theseÂ markets based on studying expected revenues and risks accompanying saidÂ investments. Investors usually avoid high-revenue investments due to the greatÂ risks accompanying them and accept low-risk investments with little revenues. AÂ quantitative method used to analyse the present research. The study was carried inÂ Erbil. The researcher distributed 100 questionnaires, only 71 questionnaires wereÂ received and being completed properly. The researcher used single regressionÂ analysis in order to find factors affecting investment in stock exchange. TheÂ findings revealed that the highest value among all variables was supply & demandÂ factor that influence stock, the second highest value was for economy factor thenÂ the third factor was competition factor and lastly the lowest value was for politicÂ factor. According the findings, it seems that supply and demand play an essentialÂ role in investment in stock exchange in Kurdistan.
THE INFLUENCE OF CRITICAL FACTORS ON THE BEHAVIOR INTENTION TO COMPUTERIZED ACCOUNTING SYSTEMS (CAS) IN CEMENT MANUFACTURES IN LIBYA
Authors: Abdullah Naheb Omran , Sukoharsono Eko Ganis , Baridwan Zaki 
Published: December 2017

Due to the rapid Â change Â in technology,Â businesses Â prefer Â to track Â monetary Â transactions using computerized system and the advancements in information technology have eventually led to the introduction Â ofÂ Computerized Â Accounting Â Systems (CAS) to Â help Â produce Â relevant, Â trusted, Â and representative Â financial reports for both management and external users for decision-making without errors. Â The shifting from conventional accounting system in Libyan organizations to Computerized Accounting Systems (CAS) resulted in some companyâ€™s staffâ€™s resistance on the adoption of the new technologies. Therefore, this study aims to examine the Influence of Critical Â Factors Â on the Behavior Intention to Computerized Accounting Systems (CAS) In Cement Manufactures Â In Libya which are, PerformanceÂ Â Â Expectancy,Â Â EffortÂ Â Expectancy,Â Â Facilitating Â Conditions,Â Â Self-efficacy Â andÂ Â Task- technology fit (TTF) to accountant Â Behavioral Â IntentionsÂ (ABI) of using (CAS) in Libyans cements organizations. This study utilized quantitative Â research Â method and survey questionnaires Â distributed 240 Â forms to Â employee Â of in Â accounting Â and Â finance Â department Â in Â four Â biggest Â Libyan Â cement manufacturers,Â Al- Murgab, Â Lubda, Â Souk Al khamis Â and Â Zalitan. Â The 189 returned forms were analyzed using PLS software. Â The result Â of analysis Â hypothesis revealed Â thatÂ there Â is a significant effect among Â all Â variables Â to Â Behavioral Â Intentions, Â but, Â only,Â Effort Â Expectancy Â does Â not Â have impactsÂ Â onÂ Â theÂ Â BehaviorÂ Â IntentionÂ Â toÂ Â ComputerizedÂ Â AccountingÂ Â Systems Â (CAS) Â InÂ Â Cement Manufactures In Libya.
To interpret the values of Bundo Kanduang in the Internal Control System
Authors: Djuharni Darti 
Published: December 2017

This research is to reveal the value of Bundo Kanduang in Internal Control System. Bundo Kanduang is a nickname given to a woman who can be an example both in the family and in the community. As a role model, many values can be learned and passed on to future generations. Data obtained from this research using etnometodhology, Â then analyzed by using indexicality and reflexivity based on Bundo Kanduangâ€™s values. The findings of this study indicate that the internal control carried out in this business raises the value of "Raso jo pareso" that is using reason and conscience in action
ANALYZING THE CONCEPTUAL MODEL OF SERVICE QUALITY AND ITS RELATIONSHIP WITH GUESTSâ€™ SATISFACTION: A STUDY OF HOTELS IN ERBIL
Authors: Anwar Kofand 
Published: December 2017

Nowadays most industries used service quality in various field.Â All industries are implementing five service quality dimensions; these dimensions are tangible, assurance, reliability, responsiveness, and empathy. The main aim of this research is to investigate hotelsâ€™ service quality and its affect on guestsâ€™ satisfaction in Erbil. Moreover, to find which service quality dimension has more affect than the other quality dimensions. The researcher utilized a quantitative research method to measure the relationship between each service quality dimension on guestsâ€™ satisfaction. A questionnaire was adapted and distributed on guests at hotels in Erbil. 111 questionnaires completed and received from hotel guests in Erbil. The findings showed that the responsive as service dimension had the highest value; on the other hand assurance as service dimension had the lowest value.
CORPORATE SOCIAL RESPONSIBILITY: ACTUALIZATION OF VALUE OF JAUDATUL ADAA (WELL ENDING) IN ISLAMIC BANKING
Authors: Mais Rimi Gusliana 
Published: December 2017

CSR is a must for all companies including sharia banking as regulated in legislation. so that today all banks do CSR reporting as a means of publication widely. Unfortunately, the values contained in current CSR reporting contain only secular activities, while Indonesia is a country with 200 million Muslims who are entitled to use Islamic religious values in their lives that are included in economic activities, including CSR. This study aims to find the appropriate Islamic values and can be applied in CSR activities. This research uses qualitative methods using an Islamic perspective as a worldview. This study found one value in Islam that can be a reference company, a sharia bank, namely the value of Jaudatul â€™Ada (Well Ending). Â Jaudatul â€™Ada can be a differentiator of csr activities conducted Islamic banking with conventional banking because Jaudatul â€™Ada is part of the value Ihsan (goodness/virtue) is a spiritual value linking well ending more comprehensive and there is not a dichotomy between material (the world) and the spiritual (hereafter). By using Jaudatul â€™Ada value, CSR performed by syaria bank is not only pursuing sustainability business but further pursuing the sustainability of maslahah (great benefit).Keyword: CSR, Islamic Value, economic, Jaudatul â€˜Ada
FACTORS INFLUENCING PATIENTSâ€™ DECISION IN SELECTING BENGKULU REGIONAL GENERAL HOSPITAL IN INDONESIA
Authors: Salim Muhartini , Bachri Syamsul 
Published: December 2017

The objectives of this study are to find: 1) Physical evidence influencing patientsâ€™ Decision in selecting Rumah Sakit Umum Daerah Bengkulu City; 2) Medicine rate influencing patientsâ€™ Decision in selecting Rumah Sakit Umum Daerah Â Bengkulu City; 3) Administrative service influencing patientsâ€™ Decision in selecting Rumah Sakit Umum Daerah Â Bengkulu City and; 4) Quality of Doctors influencing patientsâ€™ Decision in selecting Rumah Sakit Umum Daerah Â Bengkulu City. The sampling method used in this study is accidental sampling by distributing questionnaire to 151 patients or patientsâ€™ family who use health facility of inpatient in Rumah Sakit Umum Daerah Bengkulu City. The data analysis used is multilinear regression with computer application program of Statistical Package for the Social Science (SPSS) 22.0.Version. The result showed physical evidences, Â and administrative service,Â partially influence positively to patientsâ€™ Decision in selecting Rumah Sakit Umum Daerah Â Bengkulu City. However the medicine rate and quality of doctors partially does not influence patientsâ€™ Decision in selecting Rumah Sakit Umum Daerah Bengkulu CityKey words:Physical Evidence, Medicine Rate, Administrative Service, Quality of Doctors, Selecting Decision
IMPLEMENTATION OF PT TELKOM PARTNERSHIP PROGRAM IN THE SME EMPOWERMENT FRAMEWORK
Authors: . Masruddin 
Published: December 2017

This study aims to find out in depth the procedure of implementation of partnership program conducted by PT. Telkom in order to empower SME (Small and Medium Enterprises) in Palu city of Central Sulawesi, Indonesia. In addition, this study also wanted to know how the influence of the implementation of partnership programs on the power of SMEs that become partners. This study was conducted for 8 months. This study uses a qualitative approach in the realm of interpreative paradigm. The research method used to collect and analyze data is by observation and direct interview in PT Telkom branch of Palu.The results of this study indicate that the existence of this partnership program, some people in the city of Palu who know the program feel very helpful. There are several weaknesses and obstacles encountered in the implementation of this partnership program, among others: first, CDC Unit has not been fully able to analyze the proposal from prospective partner of PT Telkom. Secondly, the absence of financial records of SMEs, so that SMEs are difficult to know and determine the turnover of its business. Third is the lack of effective coaching is done, because coaching is only done before the signing of the contract (initial crediting), not intensified byÂ Telkom during the contract runs. Fourthly, there is still no transparency from Telkom related to the prospective partners who were accepted and rejected even though they have met the requirements. This resulted in the presupposition of the prospective partners assisted by the existence of the lack of independence from Telkom. Fifth, the implementation of 5C in the partnership program has not run optimally, this is also due to the lack of employees who handle it optimally. Sixthly, there are still partners who are less serious by utilizing the facilities provided by PT Telkom partnership program.