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101.
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Tao Wen Quanbo Ge Xinan Lyu Lei Chen Costas Constantinou Clive Roberts Baigen Cai 《Journal of The Franklin Institute》2021,358(1):131-150
As a typical railway Cyber-physical System (CPS), radio-based train control systems have been playing an increasingly important role in rail transit. The engaged network, Global System for Mobile Communications for Railway (GSM-R), which is an out-dated wireless communication technology, will be decommissioned due to diminishing support from industry, and a new generation successor, e.g. Long-Term Evolution (LTE), is urgently required to replace the current network. The radio-based train control systems must be safety critical, which relies on a high-security Data Communication System (DCS). In this paper, a novel wireless network migration methodology in DCS is proposed. By using this methodology, the high-security required DCS performance in radio-based train control systems is maintained and the network migration cost, e.g. the used number of base station (BS), is reduced when updating the GSM-R to LTE. 相似文献
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Though not without its critics, the concept of political cultureis potentially of much value in aiding the explanation of politicalprocesses and behavior. Unfortunately, however, basic data onpolitical culture remains scarce for many countries, Australiaamong them. Although there is a good deal of impressionisticliterature outlining the contours of the Australian politicalculture, broadly defined, very little systematic evidence hasbeen adduced to test the many assertions made in these writings.This paper injects some empirical substance into the argument.Using the Australian National Social Science Survey 198487panel, based on a nationwide sample of 1311 respondents, itpresents evidence on five dimensions of mass political culturein Australia, namely, attitudes towards reliance on government,the responsiveness of government, citizen duty, authoritarianismand federalism. In addition to outlining the basic distributionsof public opinion on these dimensions, the paper uses multivariateanalysis to investigate both the causes and consequences ofthese attitudes. 相似文献
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In two experiments, we investigated the impact of odor preexposure treatments on the acquisition of an olfactory discrimination in dogs. In the first experiment, four groups of dogs were each given five days’ odor-exposure treatment prior to discrimination training. Dogs in the exposure group were exposed to anise extract (S+) for 30 min daily. Dogs in the Pavlovian-relevant pairing group received six daily delayed-conditioning trials to the same S+. The Pavlovian-irrelevant pairing group received conditioning trials to almond extract (S'). Dogs in the control group received no pretreatment. All of the dogs were then trained to detect S+ from a background pine odor (an AX-vs.-X discrimination). The Pavlovian-relevant pairing group acquired the odor discrimination significantly faster than all of the other exposure and control groups, and the remaining groups acquired the discrimination at the same rate as the no-exposure control group. In a second experiment, we extended these results to a within-subjects design using an AX-versus-BX discrimination. Six dogs were simultaneously trained on two different odor discriminations, one discrimination in which the S+ was previously Pavlovian conditioned, and one discrimination in which the S+ was novel. All of the dogs learned the odor discrimination with the previously conditioned S+ faster than they learned the novel odor discrimination, replicating the results of Experiment 1, and demonstrating that familiarity in the form of Pavlovian conditioning enhances odor-discrimination training. The potential mechanisms of the facilitated transfer of a Pavlovian conditioned stimulus to discrimination training are discussed. 相似文献
107.
PEDAGOGICAL DRIFT: THE EVOLUTION OF NEW APPROACHES AND PARADIGMS IN RELIGIOUS EDUCATION 总被引:2,自引:1,他引:1
Clive Erricker 《Religious education (Chicago, Ill.)》2013,108(1):20-35
This article considers issues raised by attempting to place spirituality in the context of religious education. While, this might appear to be the least problematic for marriages, or most obvious pairing of dancing partners, when considering how it can be addressed in other curriculum subjects, on closer inspection, perhaps it gives rise to some of the most disturbing issues formal education has to face. These issues range across interconnected themes related to philosophical inquiry, national context and tradition, social values, and the rights of citizens in democratic communities. The argument presented is that whether, when we interrogate these issues in the context of different social histories, with special reference to England and Wales, we find that the concept of spirituality questions current constructs of education and religious education. 相似文献
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Clive Whitehead 《History of education》2013,42(3):315-329
Colonial education has been controversial and widely divergent interpretations have been offered from contrasting ideological perspectives. British imperial education policy was highly contended during the colonial era and remains a contentious issue amongst many contemporary historians and a critical review of the historiography of the subject is long overdue. British colonial education policy starts in India in 1813, the intention being to promote both Oriental culture and Western science. But a former Director of Public Instruction, writing in the 1920s, claimed that education had done far less for Indian culture than for the material and political progress of India. More recent academic writing about the history of education in British India has been both intermittent and of mixed quality. To date, much of the criticism of British policy appears to have been motivated more by emotion rather than by detailed scholarly analysis and this account argues that more ‘plodding’ in archives is urgently needed at the present time to substantiate, refine or refute the claims of India’s educational historians. This is the first part of a two‐part article, the second of which will deal with Africa and the rest of the colonial Empire. 相似文献
110.
Grace N. Mitchell Clive L. Grafton 《Community College Journal of Research & Practice》2013,37(3):273-280
Among the “new” students attending community colleges are a large number of reserve and lateral transfers, students with previous college experience. This study was conducted to provide information on their characteristics and their reasons for attending and leaving colleges as compared to the first‐time college study. A sample of 10,196 students in the Los Rios Community College District (California) was studied and five student groups were identified: First Time Students (FTS), 54.7 percent; Noncompleter Lateral Transfers (NCLT), 19.2 percent; Completer Lateral Transfers (CLT), 7.5 percent; Noncompleter Reverse Transfers (NCRT), 12 percent; Completer Reverse Transfers (CRT), 7.6 percent. The CRT and FTS groups differed most significantly. The CRT were older, more often married with children, worked more hours, and were taking fewer units. In general, the characteristics of the other three groups were similar and at a mid‐point between the CRT and FTS. Factor analysis of the reasons for attending showed that factors related to job training, location, low cost, lack of admissions requirements, and the colleges' reputation were important for study groups. Preparation for transfer was not among the most important factors for any group. Students who left four‐year colleges listed reasons related to academic indecision, cost, and items critical of the previous institutions significantly more often than students who had left two‐year colleges. They reported reasons related to mobility and short‐range goals significantly more often. Results appeared to support previous studies with regard to students' characteristics. Further research on students' reasons for attending and leaving, as well as a reexamination of colleges' program formats, services and delivery systems were recommended. 相似文献