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feasibility study of CP violation inτ^(-)→Ksπ^(-)ντdecays at the Super Tau Charm Facility

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Chinese Physics C 2021年第5期45卷 29-38页

作者： Haoyu Sang Xiaodong Shi Xiaorong Zhou Xianwei Kang Jianbei Liu State Key Laboratory of Particle Detection and Electronics Hefei 230026China University of Science and Technology of China Hefei 230026China 'Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBejjing Normal UniversityBeijing 100875China Beijing Radiation Center Beiing 100875China

We report a feasibility study for violation inτ^(-)→Ksπ^(-)ντdecays at a Super Tau Charm Facility(STCF).With an expected luminosity of 1 ab-1 collected by STCF per year at a center-of-mass energy of 4.26 GeV,the statistical sensitivity for CP violation is determined to be of order 9.7×10^(-4)by measuring the decay-rate differ-ence betweenτ^(+)→Ksπ^(+)ντandτ^(-)→Ksπ^(-)ντ.The analysis is performed using a reliable fast simulation software package,which can describe the detector responses properly and vary the responses flexibly for further ***,the energy-dependent efficiencies for reconstructingτ^(-)→Ksπ^(-)ντare *** expected CP sens-itivity is proportional to 1/T in the energy region from 4.0 to 5.0 *** sensitivity of CP violation is of order 3.1×10^(-4)with 10 ab^(-1)integrated luminosity,which is equivalent to ten years'data taking in this energy region at STCF.

关键词： feasibility study tau CP violation STCF

feasibility study of highwall mining in north surface mine of Yima Coal Corporation, China

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Journal of University of Science and Technology Beijing 2003年第6期10卷 1-4页

作者： GuomingCheng SitingWang MeifengCai InstituteofGeologyandGeophysics ChineseAcademyofSciencesBeijing100029China CivilandEnvironmentalEngineeringSchool UniversityofScienceandTechnologyBeijingBeijing100083China

Yima Coal Corporation is considering to adopt highwall mining method withauger machine to recover coal from north surface pit that has reached final highwall position. Themajor geomechanical issues associated with auger mining are highwall and pillar stability. Based onthe field investigation and laboratory test results of mechanical parameters, numerical modeling iscarried out to assess the stability of highwall and pillar. Field measurements of highwalldeformation have been used to validate and ensure the confidence for the development of realisticmodels. The results of numerical modeling show that the mining method is feasible for mining theseam of 10 m thickness in north surface coal mine.

关键词： highwall mining surface mine stability evaluation feasibility study

Operational feasibility study of stagnation pressure reaction control for a mid-caliber non-spinning projectile

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Defence Technology（防务技术） 2023年第6期24卷 109-121页

作者： F.Bouquet The Netherlands Organisation for Applied Scientific Research Oude Waalsdorperweg 632597 AK Den Haagthe Netherlands

Controlled,guided munitions can reduce dispersion in the shot,while providing the capability of engaging both stationary and maneuvering *** Netherlands Organisation for Applied Scientific Research has developed a fin-less control technology called Stagnation Pressure Reaction Control(SPRC)that takes stagnation pressure air and directs it sideways to control non-spinning *** a previous study,this technology was demonstrated at Mach 2 wind-tunnel conditions to achieve up to 1.5°controllable angle of incidence for a non-spinning,aerodynamically unstable projectile-like test *** an operational scenario,the decelerating projectile will experience a decline in control force while the simultaneous forward shift of the center of pressure increases the need for control ***,angles of incidence exceeding 1.5°will be experienced under realistic flight conditions,especially against maneuvering *** work addresses these challenges and presents an operational feasibility study for a practical application of SPRC in a non-spinning mid-caliber gun-launched projectile,using experiment data on control latency and force of the earlier *** illustrates the combined effect of the control-and stability dynamics and underlines the potential of an SPRC projectile as a precisionoperation *** research revealed that SPRC technology can stabilize and control the hypothesized projectile in a direct fire scenario against stationary and maneuvering targets.

关键词： Supersonic projectile feasibility study Ram air Stagnation pressure reaction control Simulation Attitude control

A feasibility study on the design and walking operation of a biped locomotor via dynamic simulation

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Frontiers of Mechanical Engineering 2016年第2期11卷 144-158页

作者： Mingfeng WANG Marco CECCARELLI Giuseppe CARBONE School Of Mechanical and Electrical Engineering Central SouthUniversity Changsha 410083 China Laboratory of Robotics andMechatronics (LARM) DICeM University of Cassino and SouthLatium Cassino 03043 Italy Laboratory of Robotics and Mechatronics (LARM) DICeM Universityof Cassino and South Latium Cassino 03043 Italy

A feasibility study on the mechanical design and walking operation of a Cassino biped locomotor is presented in this paper. The biped locomotor consists of two identical 3 degrees-of-freedom tripod leg mechanisms with a parallel manipulator architecture. Planning of the biped walking gait is performed by coordinating the motions of the two leg mechanisms and waist. A three- dimensional model is elaborated in SolidWorks environ- ment in order to characterize a feasible mechanical design. Dynamic simulation is carried out in *** environment with the aims of characterizing and evaluat- ing the dynamic walking design. Simulation results performance of the proposed show that the proposed biped locomotor with proper input motions of linear actuators performs practical and feasible walking on fiat surfaces with limited actuation and reaction forces between its feet and the ground. A preliminary prototype of the biped locomotor is built for the purpose of evaluating the operation performance of the biped walking gait of the proposed locomotor.

关键词： feasibility study biped locomotor bipedwalking mechanical design dynamic simulation tripodleg mechanism 3-UPU parallel manipulator

Application of the Landsat-5TM Image Data in the feasibility study of Mudflow Hazards in the Southern Taihang Mountains

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Acta Geologica Sinica(English Edition) 2000年第2期74卷 334-338页

作者： QIAO Yanxiao LI Miwen Remote Sensing Center of Hebei Province 131 Huaizhong Rd. Shijiazhuang 050021 Hebei

The Taihang Mountains area is an area in North China where serious mudflow hazards take place frequently. The hazards often obstrust traffic and make it difficult to carry out conventional ground investigations of the mudflow hazards. This paper introduces the feasibility study of mudflow hazards by using Landsat-5TM data. The study has achieved a great success through adopting both the faint spectral enhancement technique for mudflow fans (or other depositional areas) and comprehensive study of the environmental background of pregnant mudflows. Thus, remote sensing as a fast, convenient, low-cost and effective technical method can be used to recognise the situation of mudflow hazards so that effective rescue can be provided.

关键词： Landsat-5TM mudflow hazard image processing environmental background feasibility study Taihang Mountains

A feasibility study of Using Geothermal Energy to Enhance Natural Gas Production from Offshore Gas Hydrate Reservoirs by CO_(2) Swapping

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Energy Engineering 2023年第12期120卷 2707-2720页

作者： Md Nahin Mahmood Boyun Guo Department of Petroleum Engineering University of Louisiana at LafayetteLafayette70504USA

The energy industry faces a significant challenge in extracting natural gas from offshore natural gas hydrate(NGH)reservoirs,primarily due to the low productivity of wells and the high operational costs *** present study offers an assessment of the feasibility of utilizing geothermal energy to augment the production of natural gas from offshore gas hydrate reservoirs through the implementation of the methane-CO_(2)swapping *** present study expands the research scope of the authors beyond their previous publication,which exclusively examined the generation of methane from marine gas ***,the current investigation explores the feasibility of utilizing the void spaces created by the extracted methane in the hydrate reservoir for carbon dioxide *** models were employed to forecast the heat transfer from a geothermal zone to an NGH reservoir.A study was conducted utilizing data obtained from a reservoir situated in the Shenhu region of the Northern South China *** findings of the model indicate that the implementation of geothermal heating can lead to a substantial enhancement in the productivity of wells located in heated reservoirs during CO_(2)swapping *** non-linear relationship between the temperature of the heated reservoir and the rate of fold increase has been *** is anticipated that the fold of increase will surpass 5 when the gas hydrate reservoir undergoes a temperature rise from 6℃ to 16℃.The mathematical models utilized in this study did not incorporate the impact of heat convection resulting from CO_(2)flow into the gas *** factor has the potential to enhance well *** mathematical models’deviation assumptions may cause over-prediction of well productivity in geothermal-stimulated *** research is required to examine the impacts of temperature drawdown,heat convection resulting from depressurization,heat-induced gas pressure increment,and the p

关键词： Gas hydrate CO_(2)-swapping geothermal stimulation well productivity feasibility study

feasibility study of Installing Rooftop PV System with Net-Metering Scheme in Iraq

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Journal of Power and Energy Engineering 2020年第10期8卷 55-65页

作者： Qasim Kadhim Hunehen Ruqayah Ismael Mohsin Al-Sharify Mushtaq Talib Planning and Studies office Ministry of Electricity Baghdad Iraq Industrial Research and Development Department Ministry of Science and Technology Baghdad Iraq Radiophysics Electronics and Computer Systems Faculty Taras Shevchenko National University of Kyiv Kyiv Ukraine

Renewable energy, particularly solar energy, offers a clean and alternative energy source to meet the energy demand for sustainable development in the world. Due to its profitability and viability, PV net-metering scheme has been adopted in many countries. The feasibility of implementation PV rooftop system with net metering in residential, commercial, governmental and industrial sectors in Iraq is demonstrated in this study. A financial model has been developed to investigate the feasibility parameters NPV, IRR and annual savings of 24 kWp PV system. The results showed that increasing the capacity of the PV system in residential and commercial buildings will lead to a profitable investment return and the breakeven point that may make the PV net-metering projects feasible is very close to the tariff applied for the commercial sector (10.29 $c/kWh). In the governmental sector, the tariff needs to increase by 35.1% to reach breakeven. However, for such net-metering scheme to be attractive and feasible on a wide scale, it is crucial to back it with financial support through soft loans and grants.

关键词： feasibility study Solar PV System Net-Metering

feasibility study for Power Generation during Peak Hours with a Hybrid System in a Recycled Paper Mill

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Computational Water, Energy, and Environmental Engineering 2013年第2期2卷 43-53页

作者： Adriano Beluco Clodomiro P.Colvara Luis E.Teixeira Alexandre Beluco Universidade Ritter dos Reis Porto AlegreBrazil Genesys Participacoes Ltd. Porto AlegreBrazil Institution Pesquisas Hidráulicas Universidade Federal do Rio Grande do SulPorto AlegreBrazil

The differential pricing for peak hours encourages industrial consumers to look for independent power supplies for the period from 19 to 22 hours. This paper presents a study to identify the optimal solution for a recycled paper mill that also intends to work in that period. The factory is located in Rio Grande do Sul, in southern Brazil, and considers the use of a diesel gen set, a micro hydro power plant and possibly PV modules. Two micro hydro power plants were considered in the study, an old plant to be renewed and another to be fully implemented. The software Homer was used as a tool to determine the most feasible combination of components considered in the study. The sale of surplus power to the energy system appears as a key to viability of alternatives that are not based solely on diesel generators. The optimal solution consists of a combination of diesel generators and micro hydro power plant, in one case, and only on hydroelectric power plant in another, with a significant penetration of PV modules if its cost is reduced to 12% of the current price, selling an amount of energy equal to that which is bought. The annual water availability in one of the sites requires diesel supplement, while the other, more abundant, this supplement is not necessary.

关键词： Hybrid Energy Systems Micro Hydro Power PV Modules Energetic Complementarity feasibility study Computational Simulation Software Homer

feasibility study of highwall mining in north surface mine of Yima Coal Corporation,China

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Feasibility study of highwall mining in north surface mine o...