44,955 research outputs found
Ángela Chun, violín (Corea del Sur) y Jennifer Chun, violín (Corea del Sur)
No full textConcierto interpretado por Ángela Chun y Jennifer Chun. Estas artistas iniciaron sus estudios de violín y su educación musical en Corea a la edad de cinco años. Después de efectuar numerosas presentaciones y de obtener premios en Seul, su ciudad natal, fueron invitadas a continuar sus estudios de violín en el estado de Washington (USA) con el profesor Den es Zsigmondy. La New York Musicians Association las invitó a presentarse en el Carnegie Recital Hall en el año de 1985.
En este concierto interpretó obras de Jean-Marie Leclair, Marie Moszkowski, Béla Bartók, Benzad Ranjbaran y Pablo de Sarasate
Neuro-fuzzy networks for voltage security monitoring based onsynchronized phasor measurements
No full textThe ability to rapidly acquire synchronized phasor measurements from around a power network opens up new possibilities for power system operation and control. A novel neuro-fuzzy network, the fuzzy hyperrectangular composite neural network, is proposed for voltage security monitoring (VSM) using synchronized phasor measurements as input patterns. This paper demonstrates how neuro-fuzzy networks can be constructed offline and then utilized online for monitoring voltage security. The neuro-fuzzy network is tested on 3000 simulated data from randomly generated operating conditions on the IEEE 30-bus system to indicate its high classification rate for voltage security monitoring電子
Neural-Network-Based Fuzzy Model and its Application to Transient Stability Prediction in Power Systems
No full textWe present a general approach to deriving a new type of neural network-based fuzzy model for a complex system from numerical and/or linguistic information. To efficiently identify the structure and the parameters of the new fuzzy model, we first partition the output space instead of the input space. As a result, the input space itself induces corresponding partitions within each of which inputs would have similar outputs. Then we use a set of hyperrectangles to fit the partitions of the input space. Consequently, the premise of an implication in the new type of fuzzy rule is represented by a hyperrectangle and the consequence is represented by a fuzzy singleton. A novel two-layer fuzzy hyperrectangular composite neural network (FHRCNN) can be shown to be computationally equivalent to such a special fuzzy model. The process of presenting input data to each hidden node in a FHRCNN is equivalent to firing a fuzzy rule. An efficient learning algorithm was developed to adjust the weights of an FHRCNN. Finally, we apply FHRCNNs to provide real-time transient stability prediction for use with high-speed control in power systems. From simulation tests on the IEEE 39-bus system, it reveals that the proposed novel FHRCNN can yield a much better performance than that of conventional multilayer perceptrons (MLP's) in terms of computational burden and classification rat
Rule Extraction for Voltage Security Margin Estimation
No full textResearch efforts have been devoted to estimating voltage security margins which show how close the current operating point of a power system is to a voltage collapse point as assessment of voltage security. One main disadvantage of these techniques is that they require large computations, therefore, they are not efficient for on-line use in power control centers. In this paper, we propose a technique based on hyperrectangular composite neural networks (HRCNNs) and fuzzy hyperrectangular composite neural networks (FHRCNNs) for voltage security margin estimation. The technique provides us with much faster assessments of voltage security than conventional techniques. The two classes of HRCNNs and FHRCNNs integrate the paradigm of neural networks with the rule-based approach, rendering them more useful than either. The values of the network parameters, after sufficient training, can be utilized to generate crisp or fuzzy rules on the basis of preselected meaningful features. Extracted rules are helpful to explain the whole assessment procedure so the assessments are more capable of being trusted. In addition, the power system operators or corresponding experts can delete unimportant features or add some additional features to improve the performance and computational efficiency based on the evaluation of the extracted rules. The proposed technique was tested on 3000 simulated data randomly generated from operating conditions on the IEEE 30-bus system to indicate its high efficienc
Acer sycopseoides Chun
No full textAcer sycopseoides Chun (1932:t. 3160). Type.— China. Guangxi [Kwangsi]: Luocheng Xian [Lu-chen-hsien], [Tia-Lian-Shan], elev. ca. 540 m, 25 May 1928, R. C. Ching 5336 (IBSC0436401, lectotype designated by Fang 1939; isolectotypes A00050491, CQNM0000975, K000640908, NAS00071821, NAS00071822, NAS00071823, NAS00071824, NY00337719, PE00023451, PE00023452). Note:—In the protologue, Chun (1932) cited a single gathering but did not specify the herbarium where the specimens are deposited. Ten duplicates are traced in herbaria A, CQNM, IBSC, K, NAS, NY and PE as listed above, and all are syntypes according to Art. 9.6 (Turland et al. 2018). When Fang (1939) wrote “type in Suny.”, he achieved to designate the lectotype for the name. The specimen IBSC043641 was previously deposited at Suny. (Abbreviation of Sun Yatsen University) and later transferred to IBSC, which bears both the title of Sun Yatsen University (in Chinese) at lower right and handwritten annotation by W. Y. Chun. In the handwritten annotation, Chun annotated in 1930 as “ Acer sycopseoides Chun, sp. nov. (Changed from A. pachyphyllu Chun, mss). Fragments deposited at Kew”, which means the specimen IBSC043641 was not the only specimen that Chun (1932) based to describe the species, and it is reasonable to be the lectotype designated by Fang (1939). It is clearly noted in the protologue (Chun 1932) that the author of this name was Chun (W. Y. Chun), and this is also supported by annotation on the lectotype, but the authorship was wrongly ascribed to F.Chun (Faith Chun or Shuzhen Chen; e.g. Xu et al. 2008).Published as part of Chen, Feng & He, Hai, 2022, The historical relics in Chongqing Natural History Museum: An annotated checklist of original materials for 37 names of Chinese seed plants, pp. 38-52 in Phytotaxa 530 (1) on page 46, DOI: 10.11646/phytotaxa.530.1.3, http://zenodo.org/record/582393
The political role of the people's liberation army 1949-1973
Get PDFThis thesis is to study the political role of the People's Liberation Army from the approach of structure and function. The framework of the thesis consists of three major parts, first, the influence of Chinese traditional political culture on, and the formation of, the political role of the PL A; second, the influence of domestic political struggles and external military conflicts on the development of the political role of the PLA; and the third, the analysis of the transition of the PLA's political role from the structure and personnel arrangements of the CCPCC Within the above-mentioned three scopes, this thesis make a thorough discussion on the following: (1) The relationship between the structure of the PRC and the formation of the PLA's political role; (2) How has ideology influenced the army's political role; (3) What is Mao's viewpoint and his influence on the development of the army's political role; (4) What is the link between the army and the party, and how has this developed; (6) What accounts for the expansion of the PLA's political functions; (7) What is the influence of political factional struggles on the PLA's political role; (8) Is it political institution or military institution that controls the recruitment of the military elite; (9) What are the disparities between the military elite in handling international conflicts and what are their political considerations; (10) What is the Party's position in the army; (11) How have the Party’s important meetings and personnel arrangements influenced the rise and fall of the PLA's political role
Neuro-fuzzy approach to real-time transient stability prediction based on synchronized phasor measurements
No full textWith new systems capable of making synchronized phasor measurements there are possibilities for real-time assessment of the stability of a transient swing in power systems. In the future, on-line control will be necessary as operating points are pushed closer toward the margin and fast reaction time becomes critical to the survival of the system. In this paper we develop a novel class of fuzzy hyperrectangular composite neural networks which utilize real-time phasor angle measurements to provide fast transient stability prediction for use with high-speed control. From simulation tests on a sample power system, it reveals that the proposed tool can yield a highly successful prediction rate in real-time.補正完
Application of a Novel Fuzzy-Neural Network to Real Time Transient Stability Swings Prediction Based on Synchronized Phasor Measurements
Get PDFThe ability to rapidly acquire synchronized phasor measurements from around the system opens up new possibilies for power system protection and control. In this paper we develop a novel class of fuzzy hyperrectangular composite neural networks which utilize synchronized phasor measurements to provide fast transient stability swings prediction for use with high-speed control. Primary features of the method include constructing a fuzzy neural network for all fault locations, using a short window of realistic-recision post-fault phasor measurements for the prediction, and testing robustness to variations in the operating point. From simulation tests on a sample power system, it reveals that the proposed tool can yield a highly successful prediction rate in real-time.電子
The Study of Kangxi' Emperor's Chun Qiu Jie Yi
No full textWhen Chun Qiu was passed down to Kangxi in the early Qing Dynasty, it had already had a history of two millennia in which it underwent elaborations and explanations by both emperors and scholars. The preceding explicatory attempts had accumulated to not only form an enormous system of interpretation but also develop many important issues.
After having ascended to authority, Emperor Kangxi commissioned the Hanlin imperial academicians to expound Chun Qiu for him. Kangxi Emperor\ue2s Chun Qiu Jie Yi (referred to hereafter as Chun Qiu Jie Yi) is an anthology of the teaching materials used in the lectures. As newcomers to the long procession of previous interpreters of Chun Qiu, Kangxi and the academicians could not help having to respond to both the existent scholarship on the gist and calligraphy of the classic and the issues foregrounded by biographies and explanatory notes on which their own explications were based. Moreover, when it came to appropriating and extolling Chinese classics, the emperors reigning at the dawn of the Qing Dynasty, being foreign rulers, could not possibly bypass the exegetical tradition of Chun Qiu and were expected to declare their perspectives on the issues emphasized therein. Therefore, one of the aims of this dissertation is to examine how Chun Qiu Jie Yi responds to the issues in the exegetical system of Chun Qiu.
In addition, Chun Qiu Jie Yi should be regarded as a work collaboratively written by Emperor Kangxi and his assembly of lecturers specializing in classics, known as rijiang officials. Since as early as the Song Dynasty, the jingyan rijiang officials have conferred upon themselves grand ideals and great duties, maintaining \ue2the greatest responsibilities of the country rest upon the shoulders of zaixiang (the prime minister) and jingyan: whereas the former is responsible for bringing order and peace to the country, the latter is held accountable for imparting morality and virtues to the sovereign.\ue2 In Qing, a dynasty characterized by the growing concentration of power in one individual, becoming the emperor\ue2s rijiang official virtually amounted to an opportunity of a lifetime, for it allowed scholars to mold the sovereign\ue2s thinking thoroughly over an extended period of time, thereby enabling them to realize their aspiration of bettering the world. Since Chun Qiu primarily concerns events in the political realm, it has lent itself to initiating and facilitating discussions of politics as the rijiang officials saw fit. Here, what demands attention is that, in the study, the monarch temporarily assumed the role of a student while his officials preached. Beyond the study, however, the hierarchy was resumed and the ruler-subject relationship was restored. Such alternation of the dual relationship is also an aspect worthy of further consideration in Chun Qiu Jie Yi. This dissertation intends to compare the exegetic works cited in Chun Qiu Jie Yi, in hopes of assessing the attainability of the rijiang officials\ue2 aspiration to act as the emperor\ue2s mentors.
The dissertation approaches Chun Qiu Jie Yi as a historical activity. Hence, it attempts to contextualize the anthology, to reconstruct the circumstances in which Kangxi and his rijiang officials undertook the explication of Chu Qiu, and to scrutinize their interpretive behaviors and the underlying ideologies as well as purposes. On the grounds of this premise, when discussing the hermeneutic activities in Chun Qiu Jie Yi, the dissertation aims to first point out the ideas the anthology conveys, highlighting its concerns about a sovereign\ue2s method of governing a country. Second, the dissertation shifts the focus from what the anthology is about to how Kangxi and his officials\ue2 viewpoints on political doctrines were articulated. It proceeds to analyze the hermeneutics as well as ensuing pitfalls of Chun Qiu Jie Yi, with the aim of calling attention to the similarities between the anthology\ue2s reading of Chun Qiu and the decoding activity that extends from the author (real or implied) to the reader (real or ideal) as proposed in the contemporary theory of narratology. Third, the dissertation zeroes in on the exegetic works cited in Chun Qiu Jie Yi in order to, on the one hand, investigate the anthology\ue2s response to and evasion of key issues accentuated by scholars of preceding dynasties and the history of Chu Qiu studies and, on the other hand, probe into the interrelationship between the exegesis of the classic and the political appropriation of such a literary classic as exemplified therein. Finally, the dissertation ventures to suggest that in the heart of the hermeneutics adopted in Chun Qiu Jie Yi lies a structure akin to a flower with multiple layers of petals\ue2a structure of thinking wherein the anthology strives to both establish its legitimacy in understanding the profound teachings of Confucius and canonize its interpretation as the paradigm their literary and political successors would consult. It concerns not only how traditional intellectuals approached an ancient classic but also how scholars of Han descent, in particular, consciously appropriated the classic to serve their roles as teachers for a foreign emperor in early Qing
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