尚未缕清思路。 听领导说： http://news.sciencenet.cn/htmlnews/2019/7/427909.shtm “ 要利用好 朋友圈 ，把自己的冥思苦想变成 集思众创 ，共同把冷板凳 坐热 。” “提升自主创新能力，突破‘卡脖子’的关键创新技术，服务于国家和地方经济发展，迫切需要发挥人才的作用。” 一张 照片 引发的 惊悚 （ 磁场 起因的困惑） 正电子, positron; positive electron; antielectron，基本粒子的一种，带正电荷，质量和电子相等，是电子的反粒子。 Positron, also called positive electron, positively charged subatomic particle having the same mass and magnitude of charge as the electron and constituting the antiparticle of a negative electron. 由于“正、负”电子具有相同的质量、电荷，因此在磁场里的运动轨迹应该是“镜像对称”的。 然而，让人惊悚、细思极恐的是： 1932年，美国加州理工学院的安德森与内德梅耶在云雾室中充入过饱和的乙醚气，拍摄到了高能宇宙射线穿过铅板后，在磁场中长线了一对液滴线。即“正负电子对 positron-electron pair”的轨迹。即，下图： 从这张照片里可以看到，两个轨迹基本上都是圆形，所以可以推断： （1）该正负电子对的轨迹，应该基本在同一平面； （2）照相机镜头应该和该该正负电子对的运动平面垂直，没有非垂直夹角引起的“椭圆”投影变形。 细思极恐的是： 这两个圆形轨迹，直径大小有明显的差异。不是完全对称的镜像轨迹。 洛伦兹力 F = q v × B 到底针对正、负电子的初速度 v 不同，还是感受到的磁场 B 不同？ 从照片看，轨迹分裂后的一段时间，正、负电子的轨迹基本是对称的。即，初速度 v 的大小 v 应该是差不多的。下面是上图裁剪出的局部，再放大： 因此，最合理的解释也许是： 正、负电子在运动中，感受到的磁场的强度（磁感应强度）是不同的。 “磁场可能是依赖坐标系/参照系”的！ 目前认为磁场是电荷运动产生的，这样，磁场显然与运动有关。 多导体运动中的磁场，到底该怎么计算？麦克斯韦的经典电磁理论里没有进一步的说明。 是不是我想错了？ 相关资料： 正电子_百度百科 https://baike.baidu.com/item/%E6%AD%A3%E7%94%B5%E5%AD%90 Positron, subatomic particle, Britannica.com https://www.britannica.com/science/positron Positron, also called positive electron, positively charged subatomic particle having the same mass and magnitude of charge as the electron and constituting the antiparticle of a negative electron. The first of the antiparticles to be detected, positrons were discovered by Carl David Anderson in cloud-chamber studies of the composition of cosmic rays (1932). 中国科学院高能物理研究所，2010-04-15，云雾室 http://www.ihep.cas.cn/kxcb/kpcg/lztcq/201004/t20100415_2823066.html 1932年，安德森（Carl David Anderson，1905-1991）与内德梅耶（Seth Neddermeyer，1907-1988）将云室置入一个强磁场之中观察宇宙射线。宇宙射线进入云室后会留下轨迹，拍下轨迹的照片，即可用来进行分析。安德森当时每隔15秒钟使云室膨胀一次并拍摄照片。通过对1300张粒子轨迹照片的详细分析，发现有一种粒子的轨迹与当时已知的带电粒子的轨迹不一样。根据轨迹偏转的方向，可以判断这种粒子的电荷是正的，又根据轨迹曲率的大小，可推知这种粒子要比质子轻得多，且与电子的质量近乎相等。 SME张磊，2016-12-29，这是注定要拿诺贝尔奖的人，成功避开3次诺贝尔奖又算什么！ http://blog.sciencenet.cn/blog-2966991-1024151.html https://zhuanlan.zhihu.com/p/24632090 2019-04-22，感谢“中科院科学智慧火花”贴出评论：正负电子对在磁场中可能不是完全对称的镜像轨迹 http://blog.sciencenet.cn/blog-107667-1174944.html 2012-04-12，SI基本单位中安培定义的两种可能缺陷 http://idea.cas.cn/viewdoc.action?docid=4681 Biot-Savart law, physics, Britannica.com https://www.britannica.com/science/Biot-Savart-law MIT open Course, Physics II: Electricity and Magnetism https://ocw.mit.edu/courses/physics/8-02-physics-ii-electricity-and-magnetism-spring-2007/ MIT open Course, Biot-Savart's Law Ampere's Law https://ocw.mit.edu/high-school/physics/exam-prep/magnetic-fields/biot-savarts-law-amperes-law/ Biot-Savart Law http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/Biosav.html 感谢您的指教！ 感谢您指正以上任何错误！ 感谢您提供更多的相关资料！
http://f1000medicine.com/member/2132855978177713 Jeffrey L Anderson Cardiovascular Department, LDS Hospital, USA Any competing interests declared are displayed with individual evaluations. Head of Faculty : Cardiovascular Disorders (since 15 September 2009) Jeffrey L Anderson is a Head of Faculty for the CARDIOVASCULAR DISORDERS Faculty. The role of a Head of Faculty is to help divide the Faculty (specialty) into Sections (sub-specialty areas), nominate leaders in those areas as Section Heads, and offer ongoing advice on the strategic direction of the service. They are not asked to evaluate articles, although we do, of course, welcome them. 主要学术论著与被引用情况： http://scholar.google.com.hk/scholar?hl=enq=Jeffrey+L+AndersonbtnG=Searchas_sdt=2000as_ylo=as_vis=0 Markers of inflammation and cardiovascular disease: application to clinical and public health practice: a statement for healthcare professionals from the ahajournals.org Mensah, RW Alexander, JL Anderson , RO Cannon III - Circulation, 2003 - Am Heart Assoc In 1998, the American Heart Association convened Prevention Conference V to examine strategies for the identification of high-risk patients who need primary prevention. Among the strategies discussed was the measurement of markers of inflammation. 1 The Conference ... Cited by 2185 - Related articles - BL Direct - All 7 versions ACC/AHA 2005 guideline update for the diagnosis and management of chronic heart failure in the adult: a report of the American College of Cardiology/American ahajournals.org , SC Smith Jr, CD Adams, JL Anderson , DP Faxon, V - Circulation, 2005 - Am Heart Assoc ISSN: 1524-4539 Copyright 2005 American Heart Association. All rights reserved. Print ISSN: 0009-7322. Online 72514 Circulation is published by the American Heart Association. 7272 Greenville Avenue, Dallas, TX DOI: 10.1161/CIRCULATIONAHA.105.167586 2005; ... Cited by 2073 - Related articles - All 11 versions ACC/AHA guidelines for the management of patients with ST-elevation myocardial infarction; A report of the American College of Cardiology/American Heart Jr, JS Alpert, JL Anderson , DP Faxon, V - Journal of the , 2004 - ncbi.nlm.nih.gov ACC/AHA guidelines for the management of patients with ST-elevation myocardial infarction; A report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Committee to Revise the 1999 Guidelines for the Management of ... Cited by 1079 - Related articles - All 8 versions ACC/AHA guidelines for the management of patients with ST-elevation myocardial infarction ahajournals.org , SC Smith Jr, JS Alpert, JL Anderson , DP Faxon, V - Circulation, 2004 - Am Heart Assoc This document was approved by the American College of Cardiology Foundation Board of Trustees on May 7, 2004 and by the American Heart Association Science Advisory and Coordinating Committee on May 5, 2004. The ACC/AHA Task Force on Practice Guidelines makes every effort to ... Cited by 794 - Related articles - BL Direct - All 3 versions ACC/AHA guidelines for the management of patients with ST-elevation myocardial infarction--executive summary: a report of the American College of Cardiology/ ahajournals.org , SC Smith Jr, JS Alpert, JL Anderson , DP Faxon, V - Circulation, 2004 - Am Heart Assoc ISSN: 1524-4539 Copyright 2004 American Heart Association. All rights reserved. Print ISSN: 0009-7322. Online 72514 Circulation is published by the American Heart Association. 7272 Greenville Avenue, Dallas, TX DOI: 10.1161/01.CIR.0000134791.68010.FA ... Cited by 802 - Related articles - BL Direct - All 12 versions ACC/AHA guidelines for the management of patients with acute myocardial infarction: executive summary: a report of the American College of Cardiology/ ahajournals.org TJ Ryan, JL Anderson , EM Antman, BA Braniff, NH - Circulation, 1996 - Am Heart Assoc This executive summary and listing of recommendations appears in the November 1, 1996, issue of Circulation. The guidelines in their entirety, including the ACC/AHA Class I, II, and III recommendations, are published in the November 1996 issue of the Journal of the ... Cited by 1100 - Related articles - BL Direct - All 10 versions ACC/AHA 2006 guidelines for the management of patients with valvular heart disease: a report of the American College of Cardiology/American Heart onlinejacc.org , AK Jacobs, CD Adams, JL Anderson , - Journal of the , 2006 - Am Coll Cardio Found It is important that the medical profession play a significant role in critically evaluating the use of diagnostic procedures and therapies as they are introduced in the detection, management, or prevention of disease states. Rigorous and expert analysis of the ... Cited by 1035 - Related articles - All 10 versions ACC/AHA 2007 guidelines for the management of patients with unstable angina/non-ST-elevation myocardial infarction: a report of the American College of onlinejacc.org JL Anderson , CD Adams, EM Antman, - Journal of the , 2007 - Am Coll Cardio Found The American College of Cardiology Foundation (ACCF) and the American Heart Association (AHA) have jointly engaged in the production of such guidelines in the area of cardiovascular disease since 1980. The American College of Cardiology (ACC)/AHA Task Force on ... Cited by 985 - Related articles - All 8 versions ACC/AHA/SCAI 2005 guideline update for percutaneous coronary intervention: a report of the American College of Cardiology/American Heart Association Task Force onlinejacc.org CD Adams, JL Anderson , DP Faxon, V - Journal of the , 2006 - Am Coll Cardio Found Acknowledgement: The ACC and AHA recognize Dr J. Ward Kennedy for his dedicated service on developing ACC/AHA guidelines for PTCA and PCI since their inception in 1986 and for his counsel and advice in the preparation of this guideline. ... This document was approved ... Cited by 650 - Related articles - All 10 versions ACC/AHA/ASE 2003 guideline update for the clinical application of echocardiography: summary article: a report of the American College of Cardiology/ onlinejacc.org , JS Alpert, G Gregoratos, JL Anderson - Journal of the , 2003 - Am Coll Cardio Found Each section has been reviewed and updated in evidence tables, and where appropriate, changes have been made in recommendations. A new section on the use of intraoperative transesophageal echocardiography (TEE) is being added to update the guidelines published by the ... Cited by 612 - Related articles - All 42 versions Infection with Chlamydia pneumoniae accelerates the development of atherosclerosis and treatment with azithromycin prevents it in a rabbit model ahajournals.org JB Muhlestein, JL Anderson , EH Hammond, L Zhao, - Circulation, 1998 - Am Heart Assoc Methods and ResultsThirty New Zealand White rabbits were given three separate intranasal inoculations of either C pneumoniae (n=20) or saline (n=10) at 3-week intervals and fed chow enriched with a small amount (0.25%) of cholesterol. Immediately after the final ... Cited by 488 - Related articles - BL Direct - All 7 versions ACC/AHA/SCAI 2005 guideline update for percutaneous coronary intervention--summary article: a report of the American College of Cardiology/American Heart onlinejacc.org CD Adams, JL Anderson , DP Faxon, V - Journal of the , 2006 - Am Coll Cardio Found WRITING COMMITTEE MEMBERS Sidney C. Smith, Jr, MD, FACC, FAHA, Chair; Ted E. Feldman, MD, FACC, FSCAI*; John W. Hirshfeld, Jr, MD, FACC, FSCAI*; Alice K. Jacobs, MD, FACC, FAHA, FSCAI; Morton J. Kern, MD, FACC, FAHA, FSCAI*; Spencer B. King, III, ... Cited by 453 - Related articles - BL Direct - All 14 versions ACC/AHA/ASNC guidelines for the clinical use of cardiac radionuclide imaging--executive summary: a report of the American College of Cardiology/American Heart onlinejacc.org , JS Alpert, G Gregoratos, JL Anderson - Journal of the , 2003 - Am Coll Cardio Found The American College of Cardiology (ACC)/American Heart Association (AHA) Task Force on Practice Guidelines regularly reviews existing guidelines to determine when an update or full revision is needed. Guidelines for the Clinical Use of Cardiac Radionuclide Imaging were ... Cited by 454 - Related articles - All 8 versions ACC/AHA 2005 guideline update for the diagnosis and management of chronic heart failure in the adult--summary article: a report of the American College of ahajournals.org , SC Smith Jr, CD Adams, JL Anderson , DP Faxon, V - Circulation, 2005 - Am Heart Assoc The American College of Cardiology (ACC)/American Heart Association (AHA) Task Force on Practice Guidelines regularly reviews existing guidelines to determine when an update or full revision is needed. This process gives priority to areas where major changes in text, ... Cited by 422 - Related articles - BL Direct - All 6 versions Increased incidence of Chlamydia species within the coronary arteries of patients with symptomatic atherosclerotic versus other forms of cardiovascular disease* 1 , LA Karagounis, ML Woods, JL Anderson - Journal of the American , 1996 - Elsevier Results. Coronary atherectomy specimens were definitely positive in 66 (73%) and equivocally positive in 5 (6%), resulting in 79% of specimens showing evidence for the presence of Chlamydia species within the atherosclerotic tissue. In contrast, only 1 (4%) of 24 nonatherosclerotic ... Cited by 385 - Related articles - BL Direct - All 6 versions An ensemble adjustment Kalman filter for data assimilation psu.edu JL Anderson - Monthly weather review, 2001 - ams.allenpress.com A theory for estimating the probability distribution of the state of a model given a set of observations exists. This nonlinear filtering theory unifies the data assimilation and ensemble generation problem that have been key foci of prediction and predictability research for numerical weather ... Cited by 415 - Related articles - BL Direct - All 15 versions Biobehavioral variables and mortality or cardiac arrest in the Cardiac Arrhythmia Pilot Study (CAPS) DK Ahern, L Gorkin, JL Anderson , C Tierney, A - The American journal of , 1990 - Elsevier The present investigation was designed to test the predictive association between biobehavioral factors and clinical cardiac events. This evaluation occurred in the context of a prospective clinical trial, the Cardiac Arrhythmia Pilot Study (CAPS). Five-hundred two patients were recruited ... Cited by 350 - Related articles - All 3 versions Randomized secondary prevention trial of azithromycin in patients with coronary artery disease and serological evidence for Chlamydia pneumoniae infection: The ahajournals.org JL Anderson , JB Muhlestein, J Carlquist, A Allen, S - Circulation, 1999 - Am Heart Assoc Methods and ResultsCAD patients (n=302) who had a seropositive reaction to C pneumoniae (IgG titers 1:16) were randomized to receive placebo or azithromycin, 500 mg/d for 3 days, then 500 mg/wk for 3 months. Circulating markers of inflammation (C-reactive protein , ... Cited by 328 - Related articles - BL Direct - All 5 versions ACCF/AHA 2007 clinical expert consensus document on coronary artery calcium scoring by computed tomography in global cardiovascular risk assessment onlinejacc.org J Abrams, JL Anderson , ER Bates, CL - Journal of the , 2007 - Am Coll Cardio Found This document has been developed as a Clinical Expert Consensus Document (CECD), by the American College of Cardiology Foundation (ACCF) and the American Heart Association (AHA) in collaboration with the Society of Atherosclerosis Imaging and Prevention (SAIP) ... Cited by 328 - Related articles - BL Direct - All 7 versions Ensemble Square Root Filters* MK Tippett, JL Anderson , CH Bishop, TM - Monthly Weather , 2003 - ams.allenpress.com Ensemble data assimilation methods assimilate observations using state-space estimation methods and low-rank representations of forecast and analysis error covariances. A key element of such methods is the transformation of the forecast ensemble into an analysis ensemble with ... Cited by 251 - Related articles - BL Direct - All 9 versions
怎样研究固体物理？ 从水母bbs上看到了，在Science版精华区的一个八卦，作者kacmoody： 我想起了一段话。苏肇冰院士有次报告的时候说，他以前到科大向吴杭生请教t-J模型的推导，吴杭生把他骂了一顿，说他没读懂固体物理，固体物理学就是写下一个哈密顿量，然后做计算，然后把计算结果跟实验对比。 Zee曾经说起，有次Anderson去Santa Barara访问，对研究生们说，You do not write a Hamiltonian and do calculations, you just imagine what the electrons like to do. 呵呵，为什么Anderson拿了noble prize，吴杭生毕生只做了一个求超导转变温度的级数展开方法，真的不是偶然的，赫赫 最近我在学凝聚态物理，看到这样的八卦还是很有启发的。固体物理里面的哈密顿确实很麻烦，很难求解。我一点基础都没有。Anderson的这番话给了我一点信心。我现在需要做的就是闭上眼，想象光子晶体中的光子是怎么运动的，呵呵！ 至于后面的评论讨论，挺专业的，所以不知所云。但是有两段可能对于如何image有所帮助： 安德逊境界高，地球人都知道，不过对后辈来说，闭上眼睛想也是要有基础的，比如不知道Maxwell Eqs，WF，光是想波或是想粒子其实是无用的。所以尽量不用数学，和尽量用数学来思考物理问题都是很好的锻炼。 想象是最有趣的事情。。对我这样的fresh guy是这么觉得 不过老师也说。。想是没错的 但是要算！ 哎 我得到的教训是根据不足 还有基础不扎实 想的结果是越想越怀疑。。。很糟糕 一边算一边想了。。。目的是能够想清楚～ =======转载自 在格致上看到的，原作者zqyin http://gezhi.org/node/357 ============
标签: Anderson
