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Strike Point Control on EAST Using an Isoflux Control method

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Plasma Science and Technology 2015年第9期17卷 774-780页

作者：邢哲肖炳甲罗正平 m.l.walker D.A.HUmPHREYS Institute of Plasma Physics Chinese Academy of Sciences School of Nuclear Science and Technology University of Science and Technology of China General Atomics General Atomics Ct.San DiegoCA 92186USA

For the advanced tokamak,the particle deposition and thermal load on the divertor is a big *** moving the strike points on divertor target plates,the position of particle deposition and thermal load can be *** could adjust the Poloidal Field（PF） coil current to achieve the strike point position feedback *** isoflux control method,the strike point position can be controlled by controlling the X point *** the basis of experimental data,we establish relational expressions between X point position and strike point *** experiments are carried out to validate the correctness and robustness of the control *** strike point position is successfully controlled following our command in the EAST operation.

关键词： EAST plasma control system strike point control

The stability margin on EAST tokamak

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Chinese Physics B 2009年第6期18卷 2432-2440页

作者：钱金平万宝年沈彪 m.l.walker D.A.Humphreys 肖炳甲 Institute of Plasma Physics Chinese Academy of Sciences General Atomics San DiegoCaliforniaUSA

The experimental advanced superconducting tokamak （EAST） is the first full superconducting tokamak with a D-shaped cross-sectional plasma presently in operation. Its poloidal coils are relatively far from the plasma due to the necessary thermal isolation from the superconducting magnets, which leads to relatively weaker coupling between plasma and poloidal field. This may cause more difficulties in controlling the vertical instability by using the poloidal coils. The measured growth rates of vertical stability are compared with theoretical calculations, based on a rigid plasma model. Poloidal beta and internal inductance are varied to investigate their effects on the stability margin by changing the values of parameters αn and γn（Howl et al 1992 Phys. Fluids B 4 1724）, with plasma shape fixed to be a configuration with k = 1.9 and 5 = 0.5. A number of ways of studying the stability margin are investigated. Among them, changing the values of parameters κ and li is shown to be the most effective way to increase the stability margin. Finally, a guideline of stability margin ms（ki, li, A） to a new discharge scenario showing whether plasmas can be stabilized is also presented in this paper.

关键词： vertical instability growth rate stability margin

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在恶劣环境下管柱的特殊防护

石油勘探开发情报 1991年第3期 57-60页

作者： m.l.walker 袁建强

由于高合金钢管柱的抗腐蚀性及较低的维护费用和较长的使用寿命等优点，使得高合金管柱在油田得到了广泛使用，但尽管高合金管柱能抵抗硫化氢，二氧化碳和盐水等化合物的腐蚀，但对盐酸、氢氟酸等强酸的存在十分敏感，随着油田作为主要... 详细信息

由于高合金钢管柱的抗腐蚀性及较低的维护费用和较长的使用寿命等优点，使得高合金管柱在油田得到了广泛使用，但尽管高合金管柱能抵抗硫化氢，二氧化碳和盐水等化合物的腐蚀，但对盐酸、氢氟酸等强酸的存在十分敏感，随着油田作为主要增产措施之一酸化压的广为使用，油气井管柱的腐蚀破坏情况也日益严重，因此，有必要研制防止酸化液腐蚀油井管柱的缓蚀剂系列，文中介绍了油气井高合金管柱腐蚀的最新资料，试验证明了低合金缓蚀剂不适用于高合金管柱，研究得出了适应于保护高合金管柱的缓蚀剂体系及具有最大岩石溶解能力和最低腐蚀能力酸化液体系。

关键词：油气井高合金管柱防腐缓蚀剂体系酸化液体系

From Disaster to No Disaster

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北京周报（英文版） 2025年第1期68卷 20-21页

作者： Robert walker Green Templeton College Oxford University Shorenstein Center on media Politics and Public PolicyHarvard Kennedy School Jingshi Academy Beijing Normal University

The world is discharging greenhouse gas emissions at the fastest rate in *** is increasing global temperatures and creating the need for planning to prevent un-avoidable and unprecedented climate events from becoming disasters.The vital importance of raising public awareness and engaging the community in pre-ventative action was a key learning point that emerged when a group of young scientists from around the world met in Beijing in *** meeting took place at the Integrated Research on Disaster Risk(IRDR)2024 International Conference,a scientific program cosponsored by the International Science Council and the United Nations Office for Disaster Risk Reduction.

关键词： disaster from

Climate Change:No Going Back

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China Today 2025年第1期74卷 42-44页

作者： ROBERT walker Beijing Normal University Royal Society of Arts Academy of Social Sciences in the U.K

With a commitment to reduce emissions,and its investment in green technology bringing down global costs,China is emerging as the leader in fighting climate *** knows that our world is getting *** also know *** out po... 详细信息

关键词： investment bringing fighting

The Abuse of Xinjiang

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China Today 2025年第2期74卷 20-22页

作者： ROBERT walker Jingshi Academy at Beijing Normal University Academy of Social Sciences in the U.K

THE people of Xinjiang have always needed to be *** four-hour flight time from Beijing,Xinjiang Uygur Autonomous Region is located on China’s western ***,Xinjiang’s people have needed to hold steadfast against invaders while encouraging trade between China and central Asia,Europe and *** 25 years until 2016,they also witnessed multiple atrocities perpetrated by separatists.

关键词： Xinjiang border witnessed

The effect of adsorbent textural and functional properties on model naphthenic acid adsorption

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Journal of Environmental Sciences 2025年第2期148卷 27-37页

作者： Tyler m.Roy Elmira Nazari Oliver K.l.Strong Paul R.Pede Andrew J.Vreugdenhil material Science Department of ChemistryTrent University1600 West BankPeterboroughOntario K9L 0G2Canada Carbonix 690 Mountain RdSuite 200Fort William First NationOntario P7J 1G8Canada

Naphthenic acids,NAs,are a major contaminant of concern and a focus of much research around remediation of oil sand process affected waters,*** activated carbon adsorbents are an attractive option given their low cost of fabrication and implementation.A deeper evaluation of the effect NA structural differences have on uptake affinity is *** we provide an in-depth exploration of NA adsorption including many more model NA species than have been assessed previously with evaluation of adsorption kinetics and isotherms at the relevant alkaline pH of OSPW using several different carbon adsorbents with pH buffering to simulate the behaviour of real *** for the NA varied considerably regardless of the activated carbon used,ranging from 350 mg/g to near zero highlighting recalcitrant *** equilibrium data was explored to identify structural features of these species and key physiochemical properties that influence *** found that certainNAwill be resistant to adsorptionwhen hydrophobic adsorbents are *** isotherm modelling helped explore interactions occurring at the interface between NA and adsorbent *** identified the importance of NA hydrophobicity for activated carbon *** is also presented that indicates favorable hydrogen bonding between certain NA and surface site hydroxyl groups,demonstrating the importance of adsorbent surface functionality for NA *** research highlights the challenges associated with removing NAs from OSPW through adsorption and also identifies howadsorbent surface chemistry modification can be used to increase the removal efficiency of recalcitrant NA species.

关键词： Adsorption Activated carbon model naphthenic acids Isotherm modelling

Integrating a Unique leg Strengthening Device (S-Press) into Physiotherapy Rehabilitation Practice, a Qualitative Examination

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Advances in Aging Research 2025年第1期14卷 1-21页

作者： Kate walker Chris Griffiths Bharath lakkappa Research and Innovation Department Northamptonshire Healthcare NHS Foundation Trust Northampton UK Consultant/Clinical Director Community/CECS Northamptonshire Healthcare NHS Foundation Trust Northampton UK

muscle deconditioning due to hospitalisation is problematic, causing delayed discharges, more nursing, carer, or social service support following discharge, and possible discharge to a care home rather than the patient’s own home. muscle deconditioning is associated with increased mortality, infections, depression, and reductions in patient mobility and ability to engage in their activities of daily living. Preserving muscle strength and function should form part of patients’ rehabilitation plans. Progressive resistance training (PRE) offers the most cost-effective way of preserving muscle strength and function;however, it is not routinely carried out in hospitals. A leg strengthening device (the S-Press) has been developed with the aim of improving access to effective PRE for adults. Using a qualitative approach, thematic analysis of interviews with physiotherapists, patients, and relative carers about their experience of using the S-Press provided insight into integrating PRE into patients’ rehabilitation, what promoted or prevented its use, and the outcomes associated with its use. Four overall themes emerged from the data. “Experience of Users” described that the S-Press was accessible, convenient, time efficient, portable, and manoeuvrable, and it provided an objective measure of progress. “Facilitators” included findings around how the S-Press was easy to use, motivational, and comfortable when in use. “Barriers” comprised the inability of some patients to use the S-Press independently and the identification of obstacles that prevented consistent use. “Impact and Benefits” represented the perceptions of increased leg strength and psychological benefits. The S-Press is beneficial for patients’ rehabilitation by offering PRE that is simple and easy to use, acceptable to both patients and professionals, and can be integrated as part of patients’ rehabilitation plans.

关键词： Physiotherapy Rehabilitation Strength Training Deconditioning Resistance Training

Hunting for a viral proxy in bioaerosols of swine buildings using molecular detection and metagenomics

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Journal of Environmental Sciences 2025年第2期148卷 69-78页

作者： Valérie létourneau marie-Josée Gagné Jonathan m.Vyskocil Vincent Brochu Kim Robitaille martin Gauthier Julie Brassard Caroline Duchaine Quebec Heart and lung Institute Research Centre-Universitélaval 2725 Chemin Sainte-FoyQuebecG1V 4G5Canada Saint-Hyacinthe Research and Development Centre Agriculture and Agri-Food Canada3600 Casavant Boulevard WestSaint-HyacintheJ2S 8E3Canada Department of Biochemistry Microbiologyand Bio-informaticsFaculty of Science and EngineeringUniversitéLaval1045 Avenue de la MédecineQuebecG1V 0A6Canada The Swine and Poultry Infectious Diseases Research Centre Faculty of Veterinary Medicine of Universitéde Montréal3200 Rue SicotteSaint-HyacintheJ2S 2M2Canada

There are limited biosecurity measures directed at preventing airborne transmission of viruses in *** effectiveness of dust mitigation strategies such as oil sprinkling,to decrease risk of airborne virus transmission are *** and qPCR for common fecal viruses were used to hunt for a ubiquitous virus to serve as a proxy when evaluating the efficiency of mitigation strategies against airborne viral infectious *** particles were collected from swine buildings using high-volume air *** DNA and RNA were used to perform specific RT-qPCR and qPCR and analyzed by highthroughput *** astroviruses group 2 were common(from 102 to 105 genomic copies per cubic meter of air or gc/m^(3),93%positivity)while no norovirus genogroup II was recovered from air *** torque teno sus virus were detected by qPCR in low concentrations(from 101 to 102 gc/m^(3),47%positivity).Among the identified viral families by metagenomics analysis,Herelleviridae,microviridae,myoviridae,Podoviridae,and Siphoviridae were *** phage vB_Avim_AVP of Aerococcus was present in all air samples and a newly designed qPCR revealed between 101 and 105 gc/m^(3) among the samples taken for the present study(97%positivity)and banked samples from5-and 15-year old studies(89%positivity).According to the present study,both the porcine astrovirus group 2 and the phage vB_Avim_AVP of Aerococcus could be proxy for airborne viruses of swine buildings.

关键词： Bioaerosols Viral metagenomics Astrovirus Aerococcus phage Swine buildings