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volumetric changes in the focal areas of seismic events corresponding to destress blasting

International Journal of Mining Science and Technology 2019年第4期29卷 541-547页

作者： P.Konicek J.Schreiber L.Nazarova Department of Geomechanics and Mining Research Institute of Geonics of the Czech Academy of SciencesOstrava 70800Czech Republic Laboratory of Mining Informatics Chinakal Institute of Mining of the Siberian Branch of the Russian Academy of ScienceNovosibirsk 630091Russia

The typical development of total volumetric change in the focal areas of seismic events,corresponding to destress blasting,is characterized as an explosive phase followed by an implosive phase and with alternating additional phases following on from *** a few cases,a non-typical development of volumetric change was identified,where the first phase was implosive and the second phase,*** development is mainly typical for induced seismic events recorded during mining,not for destress *** events were recorded during longwall mining in the Czech part of the Upper Silesian Coal Basin,where the destress blasting technique is used as a rockburst prevention active *** source processes in the focal areas of selected seismic events were analyzed by the seismic moment tensor inversion method,as well as by studying geomechanical rock mass conditions at the localities of the seismic *** main goal of the analysis was to attempt to identify the reasons for non-typical development of volumetric changes in these *** changes were analyzed for seismic events with energy greater than 104 J,recorded in the period of time from 1993 to 2009(1109 events).80%(891)of the recorded seismic events were induced seismic events that were registered during longwall mining and 20%(218)corresponded to destress blasting *** shows that the main reason for the non-typical development of volumetric changes in the focal areas of seismic events is an association with destress blasting in the rock mass,which is very close to rock mass *** detonation of explosives in boreholes,which would dominate the first phase of volumetric changes,probably obscured stress release in the rock mass,as manifested in the first implosion phase of the volumetric changes in this case.

关键词： Destress blasting Seismic event volumetric changes Stress release

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2D polyaniline with exchangeable interlayer fluid for fast and stable volumetric dual ion storage

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Journal of Energy Chemistry 2021年第3期30卷 587-594页

作者： Xiaochen Yang Jiaxing Liang Aditya Rawal Kefeng Xiao Yuan Pu Xiao Li Zhang Ruopian Fang Da-Wei Wang Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Organic Inorganic CompositesBeijing University of Chemical TechnologyBeijing 100029China School of Chemical Engineering The University of New South WalesSydneyNSW 2052Australia NMR Facility Mark Wainwright Analytical CentreThe University of New South WalesSydney 2052NSWAustralia Research Centre of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical TechnologyBeijing 100029China School of Materials Science and Engineering Zhengzhou University450001China UNSW Digital Grid Futures Institute The University of New South WalesSydney 2052NSWAustralia

Two-dimensional(2D) layered materials are widely applied in energy devices including lithium-ion battery and supercapacitor due to their unique properties,such as tunable interlayer structure,numerous active sites,large aspect ratio versatile interlayer *** this work,2D layered tungstate acidlinked polyaniline(TALP) presented a fluid-in-solid structure,which allowed facile exchange of the interlayer fluid from moisture to conventional Li^(+) containing *** fast and stable dual ion storage(Li^(+) and PF_(6)^(-)),TALP demonstrates high-rate volumetric capacity(39 mAh cm_(-3) at 2000 mA g^(-1)) and good stability(2000 cycles at 200 mA g^(-1)) within the working potential window of 1.5-4.5 V versus Li^(+)/Li.

关键词： Tungsten acid-linked polyaniline 2D material Fluid-in-solid Lithium-ion capacitor volumetric

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Thermal Analysis of a volumetric Solar Receiver

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Journal of Thermal Science 2019年第6期28卷 1176-1185页

作者： CHEN Longfei YANG Ming LI Jinping BAI Yakai LI Xiaoxia TANG Wenxue YANG Nancong WANG Zhifeng Lanzhou University of Technology Lanzhou 730050China Key Laboratory of Solar Thermal Energy and Photovoltaic Systems Chinese Academy of SciencesBeijing 100190China Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Beijing Engineering Research Center of Solar Thermal Power Beijing 100190China Beijing CSP International Cooperation Centre Beijing 100190China Joint Laboratory Institute of Electrical EngineeringChinese Academy of Sciences and Guangdong Five Star Solar Energy Co.Ltd.Beijing 100190China Guangdong 5 Star Solar Energy CO.LTD Dongguan 523051China

The volumetric receiver has received wide attention due to its high thermal efficiency. This paper studied a new type of a solid-liquid composite volumetric receiver. The heat transfer in a solid-liquid composite volumetric solar receiver was analyzed using a one-dimensional unsteady simulation model of the solid-liquid receiver. The model included absorption of the incident solar radiation by the glass window, the silicon carbide porous ceramic heat absorber panel and the water. The results were verified against experimental data for a volumetric receiver and the error did not exceed 10%. It can be used to predict the heat transfer in solid-liquid composite volumetric receivers.

关键词： solar receiver solid-liquid composite absorber silicon carbide porous ceramic volumetric solar collector

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A volumetric Model for Evaluating Tight Sandstone Gas Reserves in the Permian Sulige Gas Field,Ordos Basin,Central China

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Acta Geologica Sinica(English Edition) 2019年第2期93卷 386-399页

作者： CUI Mingming FAN Aiping WANG Zongxiu GAO Wanli LI Jinbu LI Yijun Key Laboratory of Shale oil and Gas Geological Survey Institute of Geomechanics Chinese Academy of Geological Sciences College of Geological Science & Engineering Shandong University of Science and Technology Institute of Exploration and Development Changqing Oilfield Company Petrochina

To accurately measure and evaluate reserves is critical for ensuring successful production of unconventional oil and gas. This work proposes a volumetric model to evaluate the tight sandstone gas reserves of the Permian Sulige gas field in the Ordos Basin. The reserves can be determined by four major parameters of reservoir cutoffs, net pay, gas-bearing area and compression factor Z, which are controlled by reservoir characteristics and sedimentation. Well logging, seismic analysis, core analysis and gas testing, as well as thin section identification and SEM analysis were used to analyze the pore evolution and pore-throat structure. The porosity and permeability cutoffs are determined by distribution function curve,empirical statistics and intersection plot. Net pay and gas-bearing area are determined based on the cutoffs, gas testing and sand body distribution, and the compression factor Z is obtained by gas component. The results demonstrate that the reservoir in the Sulige gas field is characterized by ultralow porosity and permeability, and the cutoffs of porosity and permeability are 5% and 0.15×10^(–3) μm^2, respectively. The net pay and gas-bearing area are mainly affected by the sedimentary facies, sand body types and distribution. The gas component is dominated by methane which accounts for more than 90%, and the compression factor Z of H_8(P_2h_8) and S_1(P_1s_1) are 0.98 and 0.985, respectively. The distributary channels stacked and overlapped, forming a wide and thick sand body with good developed intergranular pores and intercrystalline pores. The upper part of channel sand with good porosity and permeability can be sweet spot for gas exploration. The complete set of calculation systems proposed for tight gas reserve calculation has proved to be effective based on application and feedback. This model provides a new concept and consideration for reserve prediction and calculation in other areas.

关键词： tight sandstone reservoir volumetric gas reserve Permian Sulige gas field Ordos Basin

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Numerical study of MHD mixed convection under volumetric heat source in vertical square duct with wall effects

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Theoretical & Applied Mechanics Letters 2019年第3期9卷 152-160页

作者： Zhi-Hong Liu Ming-Jiu Ni Nian-Mei Zhang School of Engineering Sciences University of Chinese Academy of Sciences

Magnetohydrodynamic (MHD) mixed convection under strong magnetic field and volumetric heat source for buoyancy-assisted flows are studied numerically in this paper. Blanket is one of key components for energy conversion in Tokamak fusion reactor. The physical model employed for simulations is refined from dual-coolant lead-lithium (DCLL) blanket. A magnetic-convection code based on a consistent and conservative scheme is developed with the help of finite volume method, and validated by some Benchmark analytical solutions. The flows inside duct with thermal insulating and electric conducting walls under exponential neutron volumetric heat source are simulated. Based on Boussinesq assumption, the influences of wall electrical conductivity and buoyancy on velocity fields, temperature distributions and Nusselt numbers are investigated. Results illustrates that the wall conductance ratio dominates the flow at low Grashof numbers and high wall conductance ratio, while buoyancy effect dominates the jet flow near side wall at a high Grashof number. In addition, the velocity along flow direction substantially impacts features of the Nusselt number and temperature distribution. Besides, the jet flow results in a higher Nusselt number and lower temperature.

关键词： Mixed convection Magnetohydrodynamic (MHD) volumetric heat source

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Co-continuous Composite Material Design Using the volumetric Distance Field Based on Analytic Shape Functions

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Journal of Harbin Institute of Technology(New Series) 2019年第1期26卷 88-96页

作者： Huimin Han Dong-Jin Yoo Yan Liang Department of Computer Aided Mechanical Design Engineering Daejin University Department of Mechanical and Electrical Engineering Hainan Institute of Science and Technology

An effective and simple design method for co-continuous composite material construction is proposed by using a hybrid methodology with triply periodic minimal surface( TPMS) cellular topology and the volumetric distance field( VDF). After generating a set of VDF-based features for the given exterior shape and desired internal core structure,a series of simple modifications in distance fields enabled us to obtain an arbitrarily-shaped complex co-continuous composite material computational model. Design results and manufactured prototypes through 3 D printing technology show that the proposed methodology has the potential to open a new paradigm for producing multifunctional next generation co-continuous composite materials which are impossible to design and manufacture using traditional CAD and CAM.

关键词： triply periodic minimal surface (TPMS) cellular topology volumetric distance field (VDF) co-continuous composite material model basic feature 3D printing technology

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volumetric modulated arc radiotherapy for limited osteosclerotic myeloma

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World Journal of Radiology 2013年第4期5卷 173-177页

作者： Aurélie Robles Antonin Levy Coralie Moncharmont Lamine Farid Jean-Baptiste Guy Nadia Malkoun Lysian Cartier Cyrus Chargari Isabelle Guichard Jean-Noёl Talabard Guy de Laroche Nicolas Magné Department of Radiotherapy Institut de Cancérologie de la Loire Department of Radiation Oncology Institut Gustave Roussy Université Paris XI Department of Radiation Oncology Hpital d'Instruction des Armées du Val-de-Grace Department of Internal Medicine CHU Saint Etienne

AIM:To assess the feasibility of volumetric intensity-modulated arc radiotherapy (VMAT) in patients with limited polyneuropathy, organomegaly, endocrinopathy, monoclonal gammopathy, and skin changes syndrome. METHODS:A 70-year-old male with histologically confirmed osteosclerotic myeloma was treated in our department in July 2010 with VMAT. Fourty-six Gray in 23 fractions were given on three bone lesions. Doses delivered to target volume and critical organs were compared with a tridimensional conformal radiotherapy (3D-RT) plan. Treatment was well tolerated without any side ***:VMAT improved dose homogeneity within the target volume, as compared to 3D-RT (standard deviations:2.9 Gy and 1.6 Gy for 3D and VMAT, respectively). VMAT resulted in a better sparing of critical organs. Dose delivered to 20% of organ volume (D20) was reduced from 22 Gy (3D-RT) to 15 Gy (VMAT) for small bowel, from 24 Gy (3D-RT) to 17 Gy (VMAT) for bladder and from 47 Gy (3D-RT) to 3 Gy (VMAT) for spinal cord. Volumes of critical organs that received at least 20 Gy (V20) were decreased by the use of VMAT, as compared to 3D-RT (V20 bladder:10% vs 99%; V20 small bowel:6% vs 21%). One year after treatment completion, no tumor progression has been reported. CONCLUSION:VMAT improved dose distribution as compared to 3D-RT for limited osteosclerotic myeloma, with better saving of critical organs.

关键词： volumetric intensity-modulated arc radiotherapy Conformal radiotherapy Critical organs Osteosclerotic myeloma Polyneuropathy organomegaly endocrinopathy monoclonal gammopathy and skin change syndrome

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Triphenylmethanol and Tris(2-(hydroxymethyl)phenol) Derivatives: Synthesis and Application as Indicators for Acid-Base volumetric Titration

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Journal of Analytical Sciences, Methods and Instrumentation 2019年第2期9卷 13-21页

作者： Ryan Beni William Boadi Jawzah Alnakhli Samiyah Alhamed Tiffany Robinson Melanie Mootry Nahom Iyob Jamill Jackson Natalie Spicer Anterrial Harris Ibrahim Bamidad Renner Antwi Shania Richardson Tralynn Williams Department of Chemistry Tennessee State University Nashville TN USA Department of Chemistry Columbus State University Columbus GA USA

Polyphenols are naturally occurring compounds found largely in fruits, vegetables, cereals and beverages. Currently, there is much interest in the potential health benefits of dietary plant polyphenols as antioxidants. The effect of polyphenols on human cancer cells is most often protective and induces a reduction in the number of tumors or rate of growth. During our course of study on anticancer prodrugs, twelve triphenylmethanol and one tris(2-(hydroxymethyl) phenol derivatives were synthesized as a carrier of several drugs with optimized lipophilicity. Besides application of these compounds as a foundation for anticancer drug delivery systems, these compounds were evaluated as indicators for the acid-base volumetric titration of a standard solution of hydrochloric acid with a standard solution of sodium hydroxide. The experiments indicated a moderate-to-sharp color transition of the solutions near the neutralization point for most indicators. These indicators may have potential applications for acid-base titrations in a narrow range.

关键词： Polyphenols Triphenylmethanol Acid-Base Indicators volumetric Titration Neutralization

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Assessment of atrial septal defect size with three-dimensional volumetric measurement of cardiac CT: comparison with size of the postoperative occluder

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China Medical Abstracts(Internal Medicine) 2013年第4期30卷 193-194页

作者：宋会军 State Key Lab Cardiovasc DisFuwai HospCAMS & PUMC

Objective To evaluate two kinds of practical CT three-dimensional volumetric measurement techniques in assessing atrial septal defects (ASDs) for transcatheter device *** Retrospective assessment of 50consecutive pati... 详细信息

关键词： septal volumetric transcatheter closure postoperative consecutive planned assessing radiography defects

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Methodology for volumetric Measuring Transport of River Sand, in a Laboratory Channel with Mobile Bottom

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Engineering（科研） 2018年第11期10卷 759-768页

作者： Martín Mundo-Molina Jose Luis Pérez-Díaz Daniel Hernández-Cruz Engineering Faculty Chiapas State University Tuxtla Gutiérrez Chiapas Mexico

Most public universities in Latin America and Mexico lack laboratories for measuring sediment transport or to do academic activities. The Research Center of the engineering faculty of Chiapas state university (UNACH by its acronym in Spanish) designed a portable prismatic channel for teaching and researching the sediment transportation in rivers. This paper presents the method to measure river sand transportation in a laboratory channel with a mobile bottom and presents the results of twenty-seven experiments done in the portable channel, using nine different slope inclinations and 27 flow and water speed values. The three main results are the following: 1) The construction of the channel with variable slopes, to experiment and measure sediment transportation. 2) A method developed for measuring the volume of sediment in a laboratory. 3) In a channel with a bottom slope of 0.071, a water flow of 2 l/s and a water speed of 1.77 m/s, the volume of transported sediment was 0.015 m3;in a channel with a bottom slope of 0.44, a water flow of 2 l/s and a water speed of 0.788 m/s, the volume of transported sediment was 0.006 m3;in a channel with the bottom slope of 0.024, a water flow of 2 l/s and a water speed of 0.62 m/s, the transported sediment was 0 m3.

关键词： volumetric Measurement of Sediment Sediment Transport Transportable Prismatic Channel Measurement of Sediment in Laboratory

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