检索结果-内蒙古大学图书馆

9th ITB International Geothermal Workshop 2020, IIGW 2020

作者： Assiddiqy, Muhamad Hasbi Gati, Rai Sibarani, Betseba Suryantini Geothermal Engineering Master's Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jl. Ganesha No.10 Bandung40132 Indonesia

The application of volcanostratigraphy has been broadly used on many early stages of geothermal exploration. The method is simple yet powerful to give a preliminary suspicion on geothermal potential before a field survey. By combining contour analysis in certain scale (1:50,000 and 1:100,000) such as ridge and river pattern with the stratigraphic analysis of volcanic product the volcanostratigraphy units are determined. In this study, the volcanostratigraphy units were assessed using geothermal potential evaluation scheme for a stratovolcano to determine the potential of a geothermal green *** the object of the study, a quarternary stratovolcano of Slamet Volcanic Complex in Central Java region was analyzed. Eight volcanostratigraphic units were determined in Slamet Volcanic Complex area and its surrounding, including six crowns and two hummocks. In addition, the hydrothermal fluid from several manifestations within the Slamet Volcanic Complex area (warm springs) were analysed to characterize the potentials of Slamet Volcanic Complex Region. Based on these determined volcanostratigraphy units,the occurrence of hydrothermal manifestation within the defined volcanostratigraphy units, the result of hydrothermal fluid analysis, and the criteria matching to the potential evaluation scheme for stratovolcano, the Slamet Volcanic Complex was categorized as potentially beneficial to be surveyed in detail. In such system, the volcanostratigraphy method is relatively simple and reliable to be applied since the volcanic evolution sequences data are accessible. © Published under licence by IOP Publishing Ltd.

关键词： Volcanoes

来源：评论

学校读者我要写书评

暂无评论

Modelling Background Seismicity Source for Probabilistic Seismic Hazard Analysis in Manado City, North Sulawesi 9

Modelling Background Seismicity Source for Probabilistic Sei...

引用

9th Asian Physics Symposium 2021, APS 2021

作者： Zulkifli, M. Triyoso, Wahyu Earth Sciences Graduate Program Faculty of Earth Sciences and Technology Bandung Institute of Technology Bandung Indonesia Global Geophysics Research Group Faculty of Mining and Petroleum Engineering Bandung Institute of Technology Bandung Indonesia Manado Indonesia

This study is used a background source model to calculate probabilistic seismic hazard analysis (PSHA) in Manado City. The gridded seismicity model is applied to characterize the background source model based on the seismicity rate on each grid 0.1 × 0.1 degrees. The results obtained from this study was the contribution of background sources for PSHA in Manado City for the probability of excedence 10% in 50 years is 0.18 ≥ g ≤ 0.19. © Published under licence by IOP Publishing Ltd.

关键词： Hazards

来源：评论

学校读者我要写书评

暂无评论

Volcanostratigraphic Approach and its Implication for Geothermal Evaluation in Talang Volcano West Sumatra 9

Volcanostratigraphic Approach and its Implication for Geothe...

引用

9th ITB International Geothermal Workshop 2020, IIGW 2020

作者： Kobare, Nyora Donald Akrom, Fadhil Muhammad Hermawan, Irfan Berrizki Geothermal Engineering Master's Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jl. Ganesha No.10 Bandung40132 Indonesia

The desk studies are a fundamental preliminary step in any geologic investigation of volcanic regions. These studies are very important approaches used in the reconnaissance survey stage for the exploration of volcanic geothermal systems. Volcanostratigraphic study has been done in Talang volcano and nearby regions, where the two topographic maps on the scale of 1:100000 and 1:50000 were utilized by drawing the patterns of drainage, ridges and flows without intersecting these flows. The first scale employed to distinguish eruption product units based on their respective eruptive centers (Crown), as well as a map on 1:50000 scale to find detailed parasitic distributed unit (s) product such as (Hummock). The challenge based on this approach is to distinguish different volcanic products based on their origins without ground truthing. Thus, the correlation with existing published geological map was employed. One volcanic unit were identified (Talang Brigade) which consists of three eruption centers (The Talang Bawah, Talang Batino and Talang Jantan Crowns) and three Hummocks with different ages based on age of eruption. The volcanostatigraphic units, is bounded by a large Talang Brigade caldera with a diameter more than 2 km. Based on analyses of the dimension, maturity, stress regimes, and an estimation of the thermal resource base of its magmatic heat source, it was concluded that Talang volcano as a geothermal potential that deserves further detailed studies before embarking to development phase. For verifying desk work studies, the detailed volcanostratigraphic mapping is recommended to understand the physical- and chemical properties of the volcanic rocks and provide the history of volcanism and validation of the potentially geothermal boundaries. © Published under licence by IOP Publishing Ltd.

关键词： Volcanoes

来源：评论

学校读者我要写书评

暂无评论

New Models for Predicting Co2 Diffusion Coefficient in Brine at High Pressure (100 Mpa) and Temperature (T = 673°K) by Artificial Intelligence ─ Implications for Co2 Sequestration in Deep Saline Aquifers

SSRN

引用

SSRN 2024年

作者： Kouhi, Maryam Mahmoudi Kohzadvand, Kamyab Shahin, Matin Shafiei, Ali Petroleum Engineering Program School of Mining and Geosciences Nazarbayev University 53 Kabanbay Batyr Avenue Astana010000 Kazakhstan Tehran Iran Faculty of Petroleum and Natural Gas Engineering Sahand University of Technology Tabriz Iran

Saline aquifers are considered as a prime target for permanent geological storage of anthropogenic CO2 owing their relative abundance and suitable storage capacity, worldwide. A deep understanding of CO2 diffusion in brine is central in modeling CO2 sequestration operations. CO2 diffusion coefficient can be determined precisely in laboratory but such tests are constrained by their relatively high cost, time intensive nature, and safety concerns due to need for high-pressure equipment. Development of precise, fast, and robust models and correlations for a broad range of pressure and temperature is vital. The goal of this research work was to develop connectionist predictive models and a correlation using four neural network algorithms to predict CO2 diffusion coefficient in CO2-brine system for pressures of up to 100 MPa and temperatures of up to 673°K. The algorithms used include multilayer perceptron (MLP), cascade forward neural network (CFNN), recurrent neural network (RNN), and gene expression programming (GEP). The databases consist of 191 experimental and molecular dynamics (MD) simulation data collected from the open literature. The input parameters include pressure, temperature, and density of brine. Density of brine was never been considered in previous modeling works where it has the greatest effect on diffusion coefficient of CO2 in brine. The Bayesian regularization algorithm was used to optimize the developed smart models. The MLP yielded the most accurate predictions with a root mean squared error (RMSE) and coefficient of determination (R2) of 2.945 and 0.998, respectively. The proposed MLP model is superior to the existing smart models and correlations considering both precision and range of pressure and temperature. Having an accurate estimation of CO2 diffusion in brine can be quite useful during preliminary assessment and modeling of CO2 sequestration operations in deep saline aquifers. © 2024, The Authors. All rights reserved.

关键词： Carbon dioxide

来源：评论

学校读者我要写书评

暂无评论

Phase and Microstructural Analysis of Novel Refractory High Entropy Alloy Y-Doped Al-Hf-Nb-Ti-V System

SSRN

引用

SSRN 2023年

作者： Muhammad, Fadhli Basuki, Eddy A. Korda, Akhmad A. Zulhan, Zulfiadi Prajitno, Djoko H. Doctorate Program of Mining Engineering Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jl. Ganesha 10 Bandung Jawa Barat40132 Indonesia Department of Metallurgical Engineering Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jl. Ganesha 10 Bandung Jawa Barat40132 Indonesia Nuclear Research Center National Research and Innovation Agency Jl. Tamansari 71 Bandung Jawa Barat40132 Indonesia

A new Y-doped Al-Hf-Nb-Ti-V refractory high-entropy alloy (RHEA) system was developed as a candidate material for high-temperature structural applications. Microstructural investigation and X-ray diffraction characterization indicated that the as-cast alloy exhibits a non-homogeneous microstructure with distinct dendritic and interdendritic regions. The addition of equimolar ratio of Al to the HfNbTiV RHEA resulted in an amorphous phase and a small amount of intermetallic phase formation. The enthalpy calculation revealed that this alloy has a mixing enthalpy of -16.2 ***-1 and a delta parameter of 5.8%, which are considerably lower negative and lower, respectively, compared with the conventional high entropy alloys. The addition of minor Y element slightly increases the value of [[EQUATION]] and δ which suppresses the occurrence of the amorphous phase and contributes to the intermetallic compound formation by increasing the amount of strongly chemically attracted atomic pairs (SCAAPs) Al-Hf and Al-Y beyond a critical value. © 2023, The Authors. All rights reserved.

关键词： Entropy

来源：评论

学校读者我要写书评

暂无评论

Resonance Behavior of a Conducting Wire Object above a Halfspace

Resonance Behavior of a Conducting Wire Object above a Halfs...

引用

2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2022

作者： Li, Siyuan Hargrave, Chad Lui, Hoi-Shun University of Technology Sydney Global Big Data Technologies Centre School of Electrical and Data Engineering UltimoNSW2007 Australia Commonwealth Scientific and Industrial Research Organisation Sustainable Mining Research Program PullenvaleQLD4069 Australia

ISBN: (数字)9781665496582

ISBN: (纸本)9781665496582

Successful extraction of the resonant modes embedded in the transient target signature is vital to resonance-based radar target recognition. For targets in free space, although these resonant modes are theoretically aspect independent, the corresponding residues are known to be aspect dependent. When the target is located above a halfspace, the interface will electromagnetically interact with the target and alter the residue. Within the context of resonance-based target recognition, the influence from an interface to the residues, to the best of our knowledge, has not been well studied. In this paper, we study this problem through a wire target. Our results show that the residues of the mode follow a similar behavior as the dielectric properties of the halfspace vary. © 2022 IEEE.

关键词： Resonance

来源：评论

学校读者我要写书评

暂无评论

Pyrolysis characteristics and dynamics analysis of a coal mine roadway conveyor belt

引用

Journal of Thermal Analysis and Calorimetry 2023年第11期148卷 4823-4832页

作者： Wang, Weifeng Liu, Hanfei Yang, Bo Zhang, Duo Lyu, Huifei Song, Xianming Shu, Chi-Min School of Safety Science and Engineering Xi’an University of Science and Technology Shaanxi Xi’an710054 China Postdoctoral Research Mobile Station in Mining Engineering Xi’an University of Science and Technology Shaanxi Xi’an710054 China Postdoctoral Program Xi’an University of Science and Technology 58 Yanta Mid. Rd. Shaanxi Xi’an710054 China Mine Rescue Team Yankuang Group Ltd. Co. Shandong Jining273500 China Graduate School of Engineering Science and Technology National Yunlin University of Science and Technology Yunlin Douliou64002 Taiwan

Coal mine conveyor-belt fires account for numerous mine disasters. Accurate prediction of burning degree is one of the critical factors in preventing and controlling conveyor-belt fires. The sparse qualitative smoke-detection method is challenging to meet the precise early warning of belt fire. Therefore, the Tangkou mine transportation belt was used to analyze TG-DTG curve change late, gas generation law, conversion rate, and apparent activation energy, and other factors at four heating rates via TG-FTIR experiments. The seven characteristic temperatures and their thresholds during belt combustion were experimentally determined, and the process was divided into three stages (I, II, III). The process mainly generated CH4, CO, CO2, and other gases, and the temperature range of various gases was identified. The conversion degree rate of each stage was positively correlated with the temperature. In Stages I and II, activation energy increased with the conversion rate and then decreased. Rate and temperature corresponding to the maximum activation energy were determined. Dynamic compensation effect of the belt combustion process was found. The reactions that could occur at each stage were inferred based on the above-mentioned characteristics;these findings were essential to intelligent comprehensive monitoring and early warning of conveyor-belt fire in a mine laneway. © 2022, Akadémiai Kiadó, Budapest, Hungary.

关键词： Coal

来源：评论

学校读者我要写书评

暂无评论

Resonance Behavior of a Conducting Wire Object below a Halfspace

Resonance Behavior of a Conducting Wire Object below a Halfs...

引用

2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2022

作者： Li, Siyuan Hargrave, Chad Lui, Hoi-Shun University of Technology Sydney Ultimo Global Big Data Technologies Centre School of Electrical and Data Engineering NSW2007 Australia Commonwealth Scientific and Industrial Research Organisation Sustainable Mining Research Program PullenvaleQLD4069 Australia

ISBN: (数字)9781665496582

ISBN: (纸本)9781665496582

The resonance scattering phenomena of an object buried below a dielectric halfspace has been studied with potential applications such as unexploded ordnance detection and breast tumor screening. These studies adopted a theoretical approach where the resonant frequencies are numerically determined via a complex root searching procedure from the impedance matrix obtained from an integral equation formulation. The practically of retrieving these resonant modes from transient responses under different excitation aspects, though is crucial for subsurface target detection application, has not been well studied. In this paper, the resonant frequencies and the corresponding residues are extracted from the transient responses of a metallic wire object below halfspace. We found that the same set of resonant modes is extracted in most cases, but the residues vary significantly as the incident angle. © 2022 IEEE.

关键词： Transient analysis

来源：评论

学校读者我要写书评

暂无评论

Removal of total dissolved solids from oil-field-produced water using ceramic adsorbents integrated with reverse osmosis

Removal of total dissolved solids from oil-field-produced wa...

引用

3rd International Conference on Chemical engineering and Applied Sciences, ICChEAS 2022

作者： Herawati, Netty Hatta Dahlan, Muhammad Yusuf, Maulana Iqbal, Maulid M. Ahmad Roni, Kiagus Nasir, Subriyer Doctoral Engineering Program Faculty of Engineering Universitas Sriwijaya Jl. Srijaya Negara Palembang30139 Indonesia Chemical Engineering Department Faculty of Engineering Universitas Sriwijaya Jl. Raya-Palembang Prabumulih Ogan Ilir30662 Indonesia Mining Engineering Department Faculty of Engineering Universitas Sriwijaya Jl. Raya-Palembang Prabumulih Ogan Ilir30662 Indonesia Civil Engineering Department Faculty of Engineering Universitas Sriwijaya Jl. Raya-Palembang Prabumulih Ogan Ilir30662 Indonesia Chemical Engineering Study Program Faculty of Engineering Universitas Muhammadiyah Palembang Jl. Jend. A. Yani 13 Ulu Plaju Palembang30137 Indonesia

Total dissolved solids (TDS) consisting of inorganic salts and organic matter are pollutants to the aquatic and water systems for human use. This paper studied the effect of ceramic adsorbent composition on improving the quality of the produced water (PW) by decreasing TDS before entering reverse osmosis (RO). Manufacturing ceramic adsorbents use a mixture of spent catalysts of residues catalytic cracking (RCC) and natural clay in various compositions. Experiments were performed using the PW from one oil and gas company in South Sumatra, Indonesia. The initial characterization of produced water contains total dissolved solids of 14,556 mg/L. The flow rate of PW into the ceramic adsorbent column were varied from 6 to 8 L/min at a contact time of 15 to 120 min. The results showed that ceramic adsorbent A (diameter 10 mm and thickness 10 mm, 70% clay, and 30% RCC) reduced TDS by 74.58%. Adsorbent B (diameter of 20 mm and thickness of 10 mm, 70% RCC and 30% clay) lowers TDS by 56.68% at a flow rate of 6 L/min and a contact time of 60 min. Adsorbent C (diameter of 10 mm and thickness of 10 mm, 30% clay, and 70% RCC) reduced TDS by 59.40% at a flow rate of 6 L/min and a flow time of 60 min. Adsorbent D (diameter of 20 mm, thickness of 10 mm, 30% clay, and 70% RCC) lowers TDS by 54.38% at a flow rate of 6 L/ min and a contact time of 60 min. After being transferred into the adsorption column, their filtrates were sent into the Reverse Osmosis (RO) membrane. The final permeates of RO have TDS values between 1,720 mg/L to 3,930 mg/L that met water standards for oil and gas exploration wastewater in Indonesia. © 2023 Elsevier Ltd. All rights reserved.

关键词： Produced Water

来源：评论

学校读者我要写书评

暂无评论

Analysis of Hydrogeology and Rainwater Prevention Systems at Sepo Village in Central Halmahera Regency, North Maluku 3

Analysis of Hydrogeology and Rainwater Prevention Systems at...

引用

3rd International Conference on Science and Technology 2019, ICST 2019

作者： Lukman, Nurany Karim, Razak Mining Engineering Study Program Faculty of Engineering Khairun University Ternate North Maluku Indonesia Mining Engineering Study Program Faculty of Engineering Muhammadiyah University Ternate North Maluku Indonesia

mining water is one of the main problems that has a great importance on mine productivity. In mining implementation, it is necessary to study the mining Water (Hydrogeology) system to support a good mine design. The mining Water drainage system is a method for making work sites in the mining area always dry. Prior to mining, hydrogeological analysis and rainwater management methods are carried out. Calculation of rainfall intensity using Gumbel Probability estimation and water capture area analysis obtained CA-1 Q = 915, 35, m3 / day CA-2 Q = 1149, CA-3 Q = 141116, 01CA-4 Q = 1407.89, the form of rainwater trapping channels in the form of trapezium and pump requirements in each catchment area of 1 (one) pump each. © 2020 Published under licence by IOP Publishing Ltd.

关键词： Hydrogeology

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：