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拜登政府遭遇能源困局

商业周刊（中文版） 2022年第19期 26-28页

作者： Jennifer A.Dlouhy Christine Buurma ari natter Gerson Freitas 王非(译) 不详

能源价格高企在美国国内引起政治风险而此时它的国外盟友又急需援助。拜登政府向石油行业高管发出的信号似曾相识,但语气要比以往都更加急迫。美国官员在9月末的在线会议上愿求他们减少输往海外的美国产燃油,并增加国内库存,以保护国内... 详细信息

能源价格高企在美国国内引起政治风险而此时它的国外盟友又急需援助。拜登政府向石油行业高管发出的信号似曾相识,但语气要比以往都更加急迫。美国官员在9月末的在线会议上愿求他们减少输往海外的美国产燃油,并增加国内库存,以保护国内消费者。今年美国官员和埃克森美孚(Exxon Mobil Corp.)、Marathon Petroleum Corp.等大型油企也举行了一系列类似会谈。但这些石油行业领袖依旧不为所动。

关键词：行业领袖埃克森美孚能源价格油企石油行业

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美国核聚变技术取得突破能源梦想初见曙光

商业周刊（中文版） 2022年第24期 37-38页

作者： ari natter Will Wade David R Baker Jonathan Tirone 邵璐宁(译) 不详

在历经50多年的挫折失败后,核聚变技术终于向成为世界最新能源迈出了坚实的一步。美国能源部12月13日表示,加利福尼亚州一个实验室的科学家首次在核聚变反应中实现了产生的能量超过引发核聚变所需的能量。这个具有里程碑意义的成功给人... 详细信息

在历经50多年的挫折失败后,核聚变技术终于向成为世界最新能源迈出了坚实的一步。美国能源部12月13日表示,加利福尼亚州一个实验室的科学家首次在核聚变反应中实现了产生的能量超过引发核聚变所需的能量。这个具有里程碑意义的成功给人们带来了希望:也许在几十年后的某一天,全球经济的运行将依靠无碳电力,其发电原理与太阳产生能量的过程如出一辙。

关键词：美国能源部核聚变反应加利福尼亚州发电原理实验室里程碑意义能源

Investigation of micro-scale shear response of sand–rubber granule mixture in terms of particle shape and grain scale deformability effects

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Particuology 2024年第7期90卷 452-469页

作者： Abdulmuttalip ari Suat Akbulut Department of Civil Engineering Yildiz Technical UniversityIstanbul34220Turkey

In this study,the effects of particle shape of rigid sand and soft rubber materials on macro-scale shear response were reasoned based on micro-scale *** this purpose,first,the shape properties of three different sand and two different rubber samples were quantified using image processing techniques,and the contact model parameters were calibrated through physical *** direct shear test was simulated in a two-dimensional discrete element software with realistic particle *** soft nature of rubber particles was reflected using body-centered cubic packing with a linear-parallel bond contact *** a result,coordination number,distribution of contact forces(i.e.,strong contact,and fabric anisotropy),and contact sliding were derived by the numerical *** has been observed that the particle shape leads to distinctive micro-scale responses due to the variations in the stiffness of the contacts.

关键词： Particle shape Sand Rubber Shear response Micro-scale response Discrete element method

Ataxia-telangiectasia mutated plays an important role in cerebellar integrity and functionality

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Neural Regeneration Research 2023年第3期18卷 497-502页

作者： Yulia Mitiagin ari Barzilai Department of Neurobiology the School of NeurobiologyBiophysicsMolecular Biology and BiochemistryGeorge S.WiseFaculty of Life SciencesTel Aviv UniversityTel AvivIsrael Sagol School of Neurosciences Tel Aviv UniversityTel AvivIsrael

Accumulating evidence indicates that ataxia-telangiectasia mutated kinase is critical for maintaining cellular homeostasis and that it has both nuclear and cytoplasmic ***,the functions of ataxia-telangiectasia mutated that when lost lead to cerebellar degeneration are still *** this review,we first describe the role of ataxia-telangiectasia mutated in cerebellar *** addition to its canonical nuclear functions in DNA damage response circuits,ataxia-telangiectasia mutated functions in various cytoplasmic and mitochondrial processes that are critically important for cellular *** discuss these functions with a focus on the role of ataxia-telangiectasia mutated in maintaining the homeostatic redox ***,we describe the unique functions of ataxia-telangiectasia mutated in various types of neuronal and glial cells including cerebellar granule neurons,astrocytes,and microglial cells.

关键词： ataxia telangiectasia ATM cerebellum DNA damage response double-strand breaks mitochondrial dysfunction oxidative stress single-strand breaks

Mechanisms of action of BCL6 during germinal center B cell development

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Science China(Life Sciences) 2015年第12期58卷 1226-1232页

作者： HUANG ChuanXin MELNICK ari Shanghai Institute of Immunology & Department of Immunobiology and Microbiology Shanghai Jiao Tong University School of Medicine Division of Hematology and Medical Oncology Department of Medicine Weill Cornell Medical College

The transcriptional repressor B cell lymphoma 6(BCL6) controls a large transcriptional network that is required for the formation and maintenance of germinal centers(GC). GC B cells represent the normal counterpart of most human B-cell lymphomas, which are often characterized by deregulated BCL6 expression or BCL6-mediated pathways. BCL6 suppresses gene transcription largely through recruitment of its co-repressors through its distinct repression domain. Understanding the precise biological roles of each repression domain in normal and malignant B cells is helpful for development of targeted inhibition of BCL6 functions that is emerging as the basis for design of anti-lymphoma therapies. This review focuses on recent progress in the molecular mechanisms of action of BCL6 in B cells and discusses remaining unresolved questions related to how these mechanisms are linked to normal and malignant B cell development.

关键词： BCL6 germinal center co-repressor lymphoma

New Relationship for Estimation of Wave Overtopping on Vertical Walls

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China Ocean Engineering 2017年第1期31卷 48-54页

作者： ESKAND ari Hojjatollah KAMALIAN Ulrich Reza Coastal Engineering Group University of Qom Qom *** Iran

Soft computing tools in the form of combination of multiple nonlinear regression and M5′ model tree were used for estimation of overtopping rate at the vertical coastal structures. For reliable and precise estimation of overtopping rate, the experimental data available in the database CLASH were used. The dimensionless overtopping rate was estimated in terms of conventional dimensionless parameters including the relative crest freeboard Rc/Hs, seabed slope tanθ, deep water wave steepness S（om）, surf similarity ξ（om） and local relative water depth ht/Hs. The accuracy of the new model was compared with other existing models and also evaluated with some field measurements. The results indicated that the model presented in this paper is more accurate than other existing models. With statistical parameters, it is shown that the accuracy of predictions in the new model is better than that of other models.

关键词： similarity dimensionless precise Walls crest formulae trained coastal separate correction

Further Bounds for Hardy Type Differences

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Acta Mathematica Sinica,English Series 2012年第6期28卷 1091-1102页

作者： Kristina KRULI Josip PEari Dora POKAZ Faculty of Textile Technology University of Zagreb Faculty of Civil Engineering University of Zagreb

In this paper we define a functional as a difference between the right-hand side and lefthand side of the refined Boas type inequality using the notation of superquadratic and subquadratic functions and study its properties, such as exponential and logarithmic convexity. We also, state and prove improvements and reverses of new weighted Boas type inequalities. As a special case of our result we obtain improvements and reverses of the Hardy inequality and its dual inequality. We introduce new Cauchy type mean and prove monotonicity property of this mean.

关键词： Inequalities Boas inequality superquadratic function subquadratic function