Geological characteristics and main controlling factors of Permian lacustrine tight oil in the eastern part of the Junggar Basin

Junwei Zhao,Huaimin Xu,Cui He,Lin Li,Zhen Yi,Huijing Fang,Zhicheng Lei 한국지질과학협의회 2017 Geosciences Journal Vol.21 No.2

The Junggar basin is rich in oil and gas resources, and recently, unconventional oil and gas reservoirs have become important targets. Significant amounts of oil and gas are located in Permian formations in the Shazhang–Dajing area, however, fewer studies have focused on unconventional oil and gas reservoirs, particularly on the factors controlling the distribution of unconventional reservoirs. In this study, a sequence stratigraphic framework of the study area was developed based on cores, well logs and seismic data. Source rock samples were analyzed, including tests of kerogen, vitrinite reflectance, chloroform bitumen, organic carbon and group composition. The physical properties and pore characteristics of reservoir samples were also analyzed using scanning electron microscope and high resolution electron microscope. The Permian Pingdiquan Formation comprises three thirdorder sequences in which individual sequence can be divided into a low-stand system tract (LST), a transgression system tract (TST), an early high-stand system tract (E-HST), and a late high-stand system tract (L-HST). Several source rock lithologies have high total organic carbon (TOC), and are matured, having excellent hydrocarbon generation potential. Clastic and dolomitic rocks are the main reservoirs, and nanometer-scale pores are the main reservoir space in the tight reservoirs. The distribution of tight oil is controlled by the sequence stratigraphy, palaeogeomorphic units, and sedimentary facies. The fine sediments, which were generally deposited near the initial flooding surface (FFS) and the maximum flooding surface (MFS), are favorable zones for tight oil. The distributions of the hydrocarbon source rocks are controlled by the depositional environment, depending on the palaeogeomorphic units; the deep depression in the Huoshaoshan area and the moderately-deep depression in the Shishugou area are two distinct hydrocarbon generating centers. The distribution of tight oil is clearly controlled by the sedimentary facies; the tight oil is mainly located in the fan delta front and lacustrine depositional environments. The distribution of tight oil in this area is summarized, and favorable areas of tight oil are proposed.

온라인 반품 행동요인에 대한 소비자 귀인 및 인지부조화의 영향 : 중국 산동성(山東省) 소비자를 중심으로

조군위(Junwei Zhao),단몽가(Mengge Duan),박현정(Hyun-Jung Park) 한국무역연구원 2021 무역연구 Vol.17 No.1

in the online market where the scale of shopping and returns is expanding rapidly. Based on the research on attribution theory;cognitive dissonance and product return behaviors;this thesis aims to help enterprises grasp consumers’ psychology and understand the causes of product return behavior. Design/Methodology/Approach Internal attribution and external attribution of dissatisfaction of purchase may lead to cognitive dissonance in the product or purchase behavior itself as well as emotional dissonance including regret;anxiety and many other psychological factors affecting product return behaviors. This paper conducted a questionnaire survey on 338 consumers who have actual return experience in Shandong Province of China. The data collected were analyzed with SPSS 26.0 and AMOS 24.0 to verify the impact of attribution and cognitive dissonance on the return reasons. Findings External attribution was more likely to cause product and emotional dissonance. Product dissonance increased emotional dissonance and the both types of cognitive dissonance had positive impacts on the reasons for product returns of “expectation not met” and “finding better”. Research Implications Results indicate that managers of online shopping sites need to find various ways to reduce internal attribution and product dissonance to minimize emotional dissonance associated to product returns.

증강현실 쇼핑 환경에서 소비자의 가치 공동창조 의도의 형성 과정

조군위(Junwei Zhao),박현정(Hyun-Jung Park) 한국무역연구원 2023 무역연구 Vol.19 No.2

COVID-19 불안감이 드론 음식배달 서비스 관련 소비자 양가성에 미치는 영향

조군위(Junwei Zhao),박현정(Hyun-Jung Park) 한국무역연구원 2021 무역연구 Vol.17 No.4

Purpose - This study aims to understand the impact of COVID-19 anxiety on the perceived attributes of drone food delivery service, the influence of various characteristics on consumer ambivalence toward service, and the effect of this ambivalence on adoption intention. Design/Methodology/Approach - This study observed the effects of COVID-19 anxiety on the attributes of drone food delivery services, including rapidity cognition, compatibility awareness, safety concerns, psychological risk, and performance risk, which affected ambivalence, and consequently, use intention. A questionnaire survey was conducted among 376 Chinese consumers are aware of drone food delivery service. Data collected were analyzed with SPSS 26.0 and AMOS 24.0 to verify the impact of the ambivalence on use intention. Findings - COVID-19 anxiety increased perceived benefits and risks associated with the technical delivery service leading to ambivalence. The cognition of rapidity and compatibility of drone food delivery services had negative impacts on ambivalence. On the contrary, safety concerns, psychological risk, and performance risk positively affected ambivalence. The ambivalence decreased usage intention. Research Implications - Results indicate that COVID-19 anxiety influenced consumer perceptions of innovative service attributes and ambivalence both directly and indirectly.

Effects of the Environment and Temperature on the Tribological Behavior of TiZrHfNbTa Refractory High-Entropy Alloy

Qing Zhao,Xi Jin,Xiao hui Shi,Hui jun Yang,Min Zhang,Junwei Qiao 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.8

The tribological behavior of TiZrHfNbTa refractory high-entropy alloy (RHEA) sliding against Si3N4ball was investigatedin the air, deionized water and seawater at room temperature as well as under dry condition at high temperature. The resultsshowed that the TiZrHfNbTa RHEA was composed of single BCC phase. The wear rate in air, deionized water and seawaterreached the maximum value of 3.02 × 10−4 mm3/(Nm), 2 × 10−4 mm3/(Nm) and 3.18 × 10−4 mm3/(Nm) at 10 N, respectively. Moreover, the wear rate in deionized water was much lower than that in air, while the wear rate in seawater was close to thatin air. The wear mechanisms were all transitioned from the abrasive wear to adhesive wear with increasing the normal load. At high temperature, the wear rate increased first and then decreased, reached the maximum value of 2.04 × 10–4 mm3/(Nm)at 500 ℃. In addition, oxidation occurred at 400 ℃. The wear mechanism changed from the abrasive wear to oxidation wearat high temperature.

Cutting Parameter Optimization for Reducing Carbon Emissions Using Digital Twin

Lili Zhao,Yilin Fang,Ping Lou,Junwei Yan,Angran Xiao 한국정밀공학회 2021 International Journal of Precision Engineering and Vol.22 No.5

With the exacerbation of global environmental concerns, manufacturing industries need to consider the impact of carbon emissions from manufacturing processes. The selection of the parameters in the machining process greatly influences on carbon emissions and machining efficiency. Hence dynamically optimizing the machining process parameters is a significant means to reduce carbon emissions according to the real-time perception of the machining conditions. In the paper, a method of cutting parameter optimization is presented on basis of the construction the digital twin of a CNC machine tool. In this method, an ontology on CNC machining process is established to be used as a communication bridge for understanding the semantic of the real-time interaction between the physical machine and the virtual twin. And a dynamic optimization method on cutting parameters is presented according to the simulation and optimization of the virtual twin with the dynamic perception of the machining conditions of the physical machine. At last, a case study is presented to validate this method for effectively optimizing the cutting parameters and decreasing carbon emissions.

Analysis of Blue Honeysuckle Binding Force During Harvest Period

Yongchao Zhao,Degang Kong,Junwei Huo 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.8

The purpose of this study is to understand the characteristics of proper binding force to harvest blue honeysuckle. After tracking such force over 16 days for four breeds of blue honeysuckle during the harvest period, we find that the binding force is mainly distributed in the range of 0.1 ~ 1.7N (P<0.05). This distribution range varies slightly between breeds: the picking forces of L.caerulea subsp.altaicai and Berel are greater than Bluebird and wild L.caerulea var.edulis of Changbai Mountain, and the binding forces of all breeds decrease over time with different slopes. Moreover, we also find that the binding force in the afternoon are significant larger than in the morning for the same day (P<0.05), and no significant difference is found between sunny and rainy days. We categorize factors affecting the binding force, such as testing day, morning and afternoon, relative humidity, temperature, weather conditions into environmental factors and time factor.

Preparation of nano-TiO2/purified diatomite coating and its photocatalytic properties of formaldehyde degradation

Lijian Wang,Junwei Zhao,Yujiang Wang,Shuilin Zheng 한양대학교 세라믹연구소 2020 Journal of Ceramic Processing Research Vol.21 No.6

The nano-TiO2/purified diatomite composite materials with core-shell structures were prepared by hydrolysis precipitationusing purified diatomite as carrier and titanium sulfate as precursor. The composite materials were characterized bytransmission electron microscope (TEM), X-ray diffraction (XRD), low temperature nitrogen adsorption and mercuryporosimetry. The photocatalytic composite coating based on the nano-TiO2/prified diatomite composite materials wasprepared and its properties of formaldehyde degradation were investigated. Meanwhile, the degradation mechanism offormaldehyde gas was discussed. The results showed that the nano-TiO2/prified diatomite composite materials were formedcore-shell structures, and the TiO2 nanoparticles were anatase with the average size of about 10 nm?The test results show thatthe formaldehyde purification performance of the coatings has met the technical requirements of Class I materials in theChinese national standard JC/T 1074-2008.

Workspace and Structural Parameter Analysis for a Novel 3-PRS Parallel Mechanism

Fuwei Sun,Junwei Zhao,Guoqiang Chen 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.12

The working space is one of the important indexes to measure the working capability of parallel mechanism. In this paper, the working space of a new type of 3-PRS parallel mechanism is studied. In the beginning, a novel 3-PRS parallel mechanism is proposed with the kinematics analyzed, and then the working space and volume are obtained by search algorithm, and the working space is drawn using MATLAB. Finally, the influence of the structural parameters on the working space is discussed, which provide theoretical basis for parameter optimization.

Metal Adsorbate-Induced Plasmon Damping in Gold Nanorods: The Difference Between Metals

Pengyu Xu,Xuxing Lu,Junwei Zhao,Yue Li,Sheng Chen,Junfei Xue,Weihui Ou,Song Han,YAPING DING,Weihai Ni 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.9

We presented a single particle study on the metal adsorbate-induced plasmon damping in Au nanorods (AuNRs) through adsorbing clusters of different metals including Pt, Au and Ag. AuNRs with different longitudinal surface plasmon resonance (LSPR) wavelength were measured and investigated individually. Linewidth broadening, plasmon shift and reduction of plasmonic resonance of single AuNRs were studied and compared between Pt, Au and Ag adsorbates. The measured linewidths perfectly match the theoretical predictions of the billiard model with increased scattering coefficients resulted from the metal adsorbates. The results indicate that the plasmon damping in case of Ag is significantly weaker than Pt and Au, which can be attributed to longer relaxation time of free electrons in Ag and therefore less loss of the oscillating plasmon electrons. In contrast to the red shift observed from Au and Pt, blue shift of the LSPR is observed in case of Ag. It suggests that plasmonic properties brought by the metal adsorbates can exert dramatic influence on the nanoparticle that is adsorbed with. We believe that our study not only provides important understanding on plasmon damping but pave the road for the fabrication of complex nanostructures with two or more metal elements.