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1.
丁肇中教授是一位同时具有卓越科研能力和出色科研组织管理才华的"现代化科学家",对于科学实验的组织、管理他有自己独到的见解.他深谙时代要求,特别注重按时代要求组织、管理实验.丁肇中科学实验的组织管理思想还充满了人文情愫,这是他这一思想的独特之处. 相似文献
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丁肇中关于科学实验的方法有着深邃而独到的见解,其所论及的科学实验方法涉及科学实验的仪器、选题、机遇、结论等,而他的科学实验方法思想的核心存在于他对实验的价值、地位及实验与理论的关系论述中. 相似文献
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丁肇中的科学实验思想述略 总被引：1，自引：0，他引：1
丁肇中是当今世界级“实验物理大师”。关于科学实验,他有着独特、精辟的见解。他认为:一个科学实验主体必须具备对科学实验浓厚执著的兴趣,及对自己所从事研究的自信心和为完成科学实验任务所具有的刻苦精神等品质;科学实验是科学理论的基础和检验标准,它又以科学理论为指导;科学实验选题要高屋建瓴,选择最重要的课题;实验中要对意外现象有准备;结论前一定要反复求证;科学实验要尽力采用先进可靠的仪器设备;还要选择优秀可靠的合作伙伴进行广泛深入的合作。 相似文献
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幼儿时期是一个人个性构成的重要时期,也是可塑性最强的时期。如今不少独生子女的性格中有许多消极的东西,如自私、娇气、任性、不合群、缺乏同情心、独立生活能力差等,这些不良的个性一旦固定下来,再想去改动它,就不那么容易了。所以,我们必须及时地、有针对性地进行教育,培育孩子们良好的个性品质。幼儿个性品质作为一种内在的要素,在很大水平上能左右人的终身,包括才气的积聚、才干的增长和才能的发挥。 相似文献
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工作沉浸是指个体在工作过程中出现的一种短时间的高峰体验,主要由专注、工作享受、内在工作动机三个核心要素所构成.目前使用较多的相关测量工具主要是Bakker工作沉浸量表.工作沉浸的影响因素主要涉及工作特征、工作资源及相关工作态度等方面,其结果变量主要涉及工作绩效、离职倾向和积极情绪等因素.未来研究主要应在工作沉浸构成要素及其内在机制、测量工具的本土化、研究方法的多样性等方面开展更多工作. 相似文献
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企业在长期经营实践中形成自身的企业伦理体系,这种伦理体系包涵企业对于市场经济的价值共识和在企业长期文件建设中形成的文化积淀,企业论文体系是企业稳定的个性心理特征.企业伦理体系的构成要素较为复杂,来自企业内外部的各种因素交互作用形成企业伦理体系.企业伦理体系收到市场经济体制、我国社会经济发展所处的阶段等外部条件的广泛影响,也与企业经营管理者的自身素质、企业发展的历史阶段等内在变量密切相关. 相似文献
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人格,是一个人的性格、气质、品德、能力等内在精神因素的总和,在一定程度上体现出一个人的综合素质,人格同性格、品格、气质的内涵具有密切的交叉关系。人的思想意识、道德情操、行为风度、品格节操等,都可以从人格上显现出来。与人格紧密联系的人格力量,就是人的内在精神因素在实践产生的效应,也就是宣传者、教育者以身作则,带头实践社会主义精神文明所倡导的道德标准和价值观念,用自己的行为去影响人、激励人和教育人,增强思想政治工作的实效性。我国是一个有悠久文明传统的国家,崇尚“修身齐家治国平天下”,并把“修身”放在第一位,形成… 相似文献
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在市场技术交易中,履行技术秘密保护措施的技术保密合约是民事法律关系的统一体.其有特殊的内在规定性,这种特殊的内在规定性构成了技术保密合约民事法律关系设立的要素,并且作为合约的技术秘密传递规则,形成了技术保密合约民事法律关系特征.其主体和主体之间的权利和义务是此民事法律关系要素.技术保密合约主体民事行为必须具有合法性. 相似文献
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产业集群作为一个特殊的组织,其内在的组织要素(战略资源、动态能力和集群学习)将在不同的层次上形成产业集群的竞争优势.其中集群战略资源构成了竞争优势的直接来源,而集群动态能力在战略资源创建过程起到加速作用,最后集群学习则是集群动态能力的最终源泉. 相似文献
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D. Schieber 《Journal of The Franklin Institute》1973,295(3):249-261
In many technical devices an a.c.-supplied “primary” magnetic field induces eddy-current flow in a “secondary” armature. Exact calculation of the overall field distribution is difficult, hence, the secondary field is often neglected in practice and only an estimate of the interaction is obtained. This paper outlines a general solution of the problem with both fields taken into account, and the specific model discussed shows how to proceed in more complicated cases. 相似文献
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A point by point determination is made of the residual current flowing during the reignition period of an a.c. arc between pure graphite electrodes in atmospheric air.The air pressure is varied from 0.14 to 5.4 atmospheres absolute and the gap varied from 1/4 to 5 mm. Alternating current of 6o cycles per second is supplied to the arc by a io Kv. power transformer and the r.m.s. discharge current is limited by ohmic resistance to values between o.o5 and 2 amperes. The residual current rises to a peak shortly after the voltage reverses and the current then decreases as the recovery voltage increases to its reignition value. The peak of the residual current increases directly with the r.m.s. current of the arc, and is essentially independent of both the length of the gap and the pressure of the gas. The reignition voltage is shown to be a function of the value of residual current existing just prior to ignition. The rate of decay of residual current decreases as gas pressure and gap length are increased. 相似文献
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G.E. Uhlenbeck 《Journal of The Franklin Institute》1929,208(4):539-541
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秦仁昌 《中国科学院研究生院学报》1964,9(1):31-36
The fern genus Diplaziopsis C. Chr. of Index Filicum has long been considered as
a monotypic one, with the sole species, D. javanica (B1.) C. Chr. from tropical Asia. In
1906, H. Christ described a second species, Allantodia cavaleriana Christ (=D. cavale-
riana C. Chr.) from Kweichow, West China, but this was since not fully recognized by
fern students in general, being often considered as a variety of the first species. This
is certainly a mistake, as is shown by ample herbarium specimens today. In the recent
work on the genus, the writer has found among the herbarium material two additional
new species from China, thus bringing the genus up to four species in Asia, mainly from
China, where, as it is, the genus has its center of development from the long past.
Phylogenetically, Diplaziopsis C. Chr. represents one of the offshoots from the great
stock of diplazioid ferns, of which the genus Diplazium Sw. constitutes the main body
of the group and from which our genus differs chiefly in its leaves of a thin texture with
reticulated venation, but not so much in its type of indusium as it has generally been
emphasized by most botanists in the past, for, as it is, the type of indusium in Di-
plaziopsis also prevails in many species of Diplazium, for which C. B. Clarke (Trans.
Linn. Soc. ser. 2, Bot. I:495, 1880) created, but really superfluously, a subgenus Pseudal-
lantodia, about which the writer will dwell in another paper in the near future. Suffice
it to say here that the indusium in Diplaziopsis as revealed by the species treated here
is, indeed, typical of diplazioid ferns, only often, as it happens, with its adaxial edge
pressed so tight under the expanding sorus that it is unable to open freely along its upper
free edge and, as a result, its thin vaulted back bursts open from the pressure of the ex-
panding sorus underneath.
As a result of the present study, following four species of the genus have been re-
cognized.
Diplaziopsis javanica (B1.) C. Chr. Ind. Fil. (1905) 227.
Wide spread in tropical Asia, northwardly to Bakbo and the southern part of Yun-
nan, China.
D. cavaleriana (Christ) C. Chr. Ind. Fil. Suppl. I (1913) 25.
Ranges from West China through northern part of Fukien of East China to Japan.
D. intermedia Ching, sp. nov.
Endemic in West China: Mt. Omei, Szechuan, and Kweichow.
D. hainanensis Ching, sp. nov.
In conclusion, it may be pointed out that with the modern plant taxonomy pursued
in a more efficient manner than in the past, and especially by the introduction of the
cytotaxonomic methods, the so-called “monotypic genera”, as conceived by the orthodox
systematists, will continue to prove, to a great extent, to be lack of enough scientific
ground. The fact that the “monotypic genus” of Diplaziopsis C. Chr. is now found to
be a genus of four well-defined species is once again an instance to illustrate the pointat issue. 相似文献
20.
Alfred Still 《Journal of The Franklin Institute》1930,210(4):437-454