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1.
Consider the positive d-dimensional lattice d (d≥2) with partial ordering ≤, let {XK; K ∈ d } be i.i.d. random vari- ables taking values in a real separable Hilbert space (H, ||·||) with mean zero and covariance operator ∑, and set partial sums SN =∑K≤NXK, K , N ∈ d . Under some moment conditions, we obtain the precise asymptotics of a kind of weighted infinite series for partial sums SN as ε 0 by using the truncation and approximation methods. The results are related to the convergence rates of the law of the logarithm in Hilbert space, and they also extend the results of (Gut and Spǎtaru, 2003).  相似文献   

2.
This paper argues that the conceptions of ‘space’ (and increasingly ‘time’) in the discussion of ‘the university’ (in its most transcendent sense) have gone through four distinct phases in the UK. Using a Heideggerian conception of ‘space’ where usefulness is more important than proximity, the ‘ancient’ universities were ‘useful’ to the gentry and thus were ‘closer’ to them than to the excluded ‘local’ poor in the institutions’ vicinities. The ‘civic’ universities on the other hand stressed ‘localism’ as part of their mandate – to educate the people of their locality (but only those of the new industrial middle class). The ‘Robbins’ universities were a partial return to the ‘ancient’ notion of learning as a ‘lived’ activity, providing scenic landscapes on green-belt campuses where students could ‘retreat’ from the ‘real world’ for the duration of their studies. The ‘spatial’ quality of these places was thus part of a conception of higher education as ‘lifestyle choice’ where young people moved away from their locality to study. As such ‘proximity’ was an issue only insofar as the greater the distance from one’s point of origin the better for successful immersion in the growing student ‘culture’. The ‘new/post-1992’ universities partially retained their polytechnic mandate to educate local people, but embraced a colonialist impulse regarding local space usage. ‘ ‘The discussion can be further refined to argue that these four stages are merely two phases which have repeated themselves: from ancient ‘exclusivity’ to civic ‘localism’ and back to Robbins era ‘exclusivity’ and thence to post-1992 ‘localism’ once more’. The opening up of higher education via the Internet in the late 20th and early 21st centuries provides for the possibility of the growth of entirely non-spatial and asynchronous learning experiences, and as such we may well be on the verge of the fifth stage of university development.  相似文献   

3.
Over the last two decades, research into the role of education in economic development has begun to pay attention to educational quality and its effect on learning outcomes. In this paper recent research on educational quality is reviewed and its application to the island economies of the South Pacific is assessed. While there is considerable variation among the countries, the paper demonstrates the pervasive nature of school quality problems in the region. Those factors which have the greatest bearing on school quality in the region are isolated. These factors are: the quality of teachers; the availability of learning materials; initial instruction in the mother tongue; the quality of educational management; and curriculum reform. The paper concludes by arguing that strategies to improve quality will fail unless they recognise important complementarities between the factors determining quality.
Zusammenfassung In den letzten zwei Jahrzehnten hat man begonnen, die Forschung über die Rolle des Bildungswesens in der wirtschaftlichen Entwicklung eines Landes auf Bildungsqualität und ihren Einfluß auf die Lernergebnisse auszudehnen. In diesem Artikel werden die neuesten Forschungen über die Qualität der Bildung aufgegriffen und eine mögliche Anwendung für die Inselwirtschaften im Südpazifik diskutiert. Dieser Artikel weist auf die überall gegenwärtige Problematik der Schulqualität in dieser Region trotz erheblicher Unterschiede zwischen den Ländern hin. Man fand folgende dafür verantwortliche Gründe heraus: Lehrerqualität, Erhältlichkeit von Lernmaterialien, Erziehung in der Muttersprache, Qualität der Schulleitung und Reform der Curricula. Der Artikel schließt mit dem Argument, daß Strategien zur Verbesserung der Qualität keinen Erfolg haben werden, solange wesentliche Zusammenhänge zwischen den qualitätsbestimmenden Faktoren nicht erkannt werden.
Résumé Au cours des vingt dernières années, la recherche sur le rôle de l'éducation dans le développement économique a commencé à prêter attention à la qualité de l'éducation et à ses effets sur les rendements de l'apprentissage. Dans le présent article, on procède à l'examen de la recherche entreprise récemment dans ce domaine et à l'évaluation de son application aux économies des îles du Pacifique sud. Tandis qu'on note une variation considérable entre les pays, on démontre la nature diffuse des problèmes relatifs à la qualité des écoles dans cette région. Les facteurs qui ont la plus grande influence sur la qualité de l'école dans la région sont isolés: qualité des enseignants, existence de matériels d'apprentissage, enseignement initial dans la langue maternelle, qualité de la gestion de l'éducation, réforme du curriculum. Cet article conclut en arguant que les stratégies devant améliorer la qualité dans ce domaine échoueront à moins qu'elles reconnaissent les complémentarités importantes entre les facteurs qui déterminent la qualité.
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4.
Infrared （IR） absorption spectra and X-ray powder diffraction （XRD） patterrns of sexpenfine cat＇s eye from Sichuan Province have been investigated, and infrared absorption bands of the serpentine have been assigned in this paper. The results indicate that the bands near 3 600 - 3 700 cm^-1 belong to the stretching absorption band VOH, the bands in 948 - 1 100 cm^-1 axe assigned to the stretching vibraling band Usvo, and the bands at 600 570 and 440 cm^-1 respectively belong to the bending vibration band VOH, δMg-O and δSi-O. The serpentine cat＇ s eye includes two types： chrysotile and antigorite. Chrysotile has a sharp and intensive band at 3 688 cm^-1 and a weak band at 3 643 cm^-1 , while antigorite has only one intensive band in the region. At vibration band VSi-O, chrysotile and antigorite have a similar feature at 1 071 cm^-1, but the band at 980 cm^-1 in anfigorite has been split into two bands in chrysotile - a strong one at 1 027 cm^-1 and a weak one at 949 cm^-1. In addition, antigorite has a characteristic bending vibrating band δMg-O at 570 cm^-1. Based on the analysis of the feature of crystal structure, their IR differences axe well explained.  相似文献   

5.
The aim of this research is to characterize the development of fatigue damage by means of stress-strain hysteresis. Experiments were conducted on 14 specimens made of cold-finished unannealed AISI 1018 steel. Results demonstrate that the mechanical hysteresis loop areas, when plotted as a function of the number of loading cycles, show significant variations and demonstrate the three principal stages concerning the progress of the fatigue failure--initial accommodation, accretion of damage and terminal failure. These three stages of fatigue are marked by the transitions at cycles N2 and N3. Experimental results show that although fatigue life Nf ranges from 2644 cycles to 108 992 cycles, the ratios of N2/Nf and N3/Nf tend to be stable： N2/Nf=I 0.7%, N3/Nf=91.3%.  相似文献   

6.
LetH n be the set of real algebraic polynomials of degreen, whose zeros all lie in the interval [−1,1]. The well known Turán type inequalities tell us that forf(x)∈H n , it holds ‖f′‖≥C√n‖f‖. This note deals with the weighted Turán type inequalities with the weights having inner singularities underL p norm for 0<p≤∞. Our results essentially extend the result of Wang and Zhou (2002), and the method used in this paper is simpler and more direct than that of Wang and Zhou (2002). The results and methods have their own values in approximation theory and computation.  相似文献   

7.
This article discusses the Priority Education Zones project (ZEP) in Mauritius. The original and innovative dimensions of the project are described, together with the difficulties encountered during the setting-up of the ZEP schools. The article covers five main issues: the status of the ZEP project; the minimal conditions for success; the implications concerning the teachers; the obstacles faced; and the strategy devised to implement the ZEP project, while overcoming the obstacles.
Mahomed Aniff GurribEmail:
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8.
S−χ2 is a popular item fit index that is available in commercial software packages such as flexMIRT. However, no research has systematically examined the performance of S−χ2 for detecting item misfit within the context of the multidimensional graded response model (MGRM). The primary goal of this study was to evaluate the performance of S−χ2 under two practical misfit scenarios: first, all items are misfitting due to model misspecification, and second, a small subset of items violate the underlying assumptions of the MGRM. Simulation studies showed that caution should be exercised when reporting item fit results of polytomous items using S−χ2 within the context of the MGRM, because of its inflated false positive rates (FPRs), especially with a small sample size and a long test. S−χ2 performed well when detecting overall model misfit as well as item misfit for a small subset of items when the ordinality assumption was violated. However, under a number of conditions of model misspecification or items violating the homogeneous discrimination assumption, even though true positive rates (TPRs) of S−χ2 were high when a small sample size was coupled with a long test, the inflated FPRs were generally directly related to increasing TPRs. There was also a suggestion that performance of S−χ2 was affected by the magnitude of misfit within an item. There was no evidence that FPRs for fitting items were exacerbated by the presence of a small percentage of misfitting items among them.  相似文献   

9.
This paper presents the main objectives of an historic reform of the Spanish school system and the overall process of educational change. In the first part, the present situation is described, principally the effort made during recent years to extend learning opportunities to everyone and the problems still to be resolved. In the second part, the main features of the reform process are identified: the quantitative versus qualitative debate, the meaning of quality, control over the curriculum, homogeneity versus diversity in the curriculum, the relationship between school and society, and the influence of the European context. In the third part, the three foremost aims of the reform are developed: to extend basic education, to modify the educational levels and to improve quality. Finally, the process of change is described from 1983 up to the present day and into the future.
Zusammenfassung In diesem Artikel geht es um die Hauptziele einer historischen Reform im spanischen Schulsystem und um den gesamten Prozeß der Veränderungen auf dem Bildungssektor. Im ersten Teil wird die gegenwärtige Situation beschrieben, und zwar hauptsächlich ein in den letzten Jahren durchgeführter Versuch, jeden in das Bildungssystem einzubeziehen. Außerdem werden die noch zu lösenden Probleme angesprochen. Im zweiten Teil werden die Hauptmerkmale des Reformprozesses identifiziert: die Debatte um Quantität gegenüber Qualität, die Bedeutung der Qualität, die Kontrolle über das Curriculum, Homogenität gegenüber Unterschieden im Curriculum, die Beziehung zwischen Schule und Gesellschaft und der Einfluß des europäischen Gedankens. Im dritten Teil werden die drei wichtigsten Reformziele entwickelt: die Erweiterung der Grundbildung, die Modifizierung der Bildungsstufen und die Verbesserung der Qualität. Im letzten Teil wird der Änderungsprozeß von 1983 an bis zur Gegenwart und in die Zukunft hinein beschrieben.
Résumé On expose dans le présent article les objectifs principaux d'une réforme historique du système scolaire espagnol et le processus global du changement éducatif. Dans la première partie, on décrit la situation actuelle en mettant un accent sur l'effort accompli ces dernières années pour donner accès à l'éducation à chacun et sur les problèmes qui restent à résoudre. Dans la deuxième partie, on identifie les caractéristiques majeures du processus de réforme: le débat quantitatif contre le débat qualitatif, la signification de la qualité, le contrôle du curriculum, l'homogénéité contre la diversité du programme d'études, les relations entre l'école et la société et l'influence du contexte européen. Dans la troisième partie, on développe les trois grands buts de ladite réforme: étendre l'éducation de base, modifier les niveaux d'éducation et améliorer la qualité. Enfin, on retrace le processus de changement de 1983 à nos jours et celui envisagé pour l'avenir.
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10.
We derive necessary and sufficient conditions for the existence and an expression of the （anti）reflexive solution with respect to the nontrivial generalized reflection matrix P to the system of complex matrix equations AX = B and XC = D. The explicit solutions of the approximation problem min x∈Ф ｜｜X - E｜｜F was given, where E is a given complex matrix and Ф is the set of all reflexive （or antireflexive） solutions of the system mentioned above, and ｜｜·｜｜ is the Frobenius norm. Furthermore, it was pointed that some results in a recent paper are special cases of this paper.  相似文献   

11.
In this paper, a semi on-line version on m identical machines M1 , M2, …, Mm ( m ≥ 3 ) was considered, where the processing time of the largest job is known in advance. Our goal is to maximize the minimum machine load, an NPLS algorithm was presented and its worst-case ratio was proved to be equal to m - 1 which is the best possible value. It is concluded that if the total processing time of jobs is also known to be greater than (2 m - 1 )Pmax where pmax is the largest job‘s processing time, then the worstcase ratio is 2 - 1/m.  相似文献   

12.
The main purpose of this article is to discuss the implications for education and training of the movement towards integration in Europe in the historic context of the creation of a single market within the European Community (EC) and the end of the Communist regimes in Central and Eastern Europe. The experience of the EC is used to illustrate trends and problems in the development of international cooperation in education and training. Common concerns and priorities throughout the new Europe are then identified and discussed. These include the pursuit of quality in schooling, efforts to serve the interests of disadvantaged learners, and the treatment of European Studies in the curriculum, including the improvement of the teaching of foreign languages.
Zusammenfassung Dieser Artikel stellt die Auswirkungen auf Bildung und Weiterbildung von Bemühungen um die Schaffung eines Gesamteuropas im historischen Kontext eines gesamteuropäischen Marktes und des Endes der kommunistischen Regimes in Ost- und Mitteleuropa dar. Die Erfahrungen der europäischen Gemeinschaft dienen zur Illustration von Trends und Problemen in der Entwicklung internationaler Kooperation in Bildung und Ausbildung. Im weiteren werden gemeinsame Interessen und Prioritäten im neuen Europa identifiziert und diskutiert. Dazu gehöen die Verbesserung der Qualität im Schulwesen, Bemühungen, Belange benachteiligter Schüler zu erfüllen, sowie die Aufnahme europäischer Studien in das Curriculum unter Berücksichtigung einer Verbesserung des Fremdsprachenunterrichts.
Résumé L'intention de cet article est d'analyser les conséquences pour l'éducation et la formation du mouvement vers l'intégration européenne dans le contexte historique de la création du marché unique dans la Communauté européenne (CE) et de la chute des régimes communistes en Europe orientale. Les expériences de la CE permettent d'illustrer les tendances et les problèmes liés au développement de la coopération internationale en matière de l'éducation et de la formation. L'article identifie et examine ensuite les préoccupations et les priorités communes retrouvées partout dans la nouvelle Europe, parmi lesquelles la recherche de la qualité dans l'enseignement, les initiatives prises à l'intention des élèves défavorisés, la place réservée aux études européennes dans le curriculum, et notamment l'amélioration de l'enseignement des langues étrangères.
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13.
The growing relevance of constitutional law for problems of access to higher education became particularly clear through the Numerus-Clausus decisions of the German Federal Constitutional Court (restricted admission due to lack of capacity) and litigation before the US-Supreme Court (preferential treatment for applicants from minority groups). The constitutions of both countries—the Basic Law of the Federal Republic of Germany of May 23, 1949 and the Constitution of the United States of September 17, 1789, as amended—are based upon the same essential decisions regarding the fundamental characteristics and objectives of the State. The Federal Republic and the USA are democratic federations of states, committed to the pursuit of the common good, and defined in their form of government by the principle of the rule of law (secured above all by a catalog of basic human rights) as expressed through the doctrine of separation of powers. This article gives an overview of the university (especially its admission system) in both countries and analyses how the constitutions are applied to key problems of access to higher education. It leads to starting points for promising investigations into comparative (constitutional) law.
Zusammenfassung Der immer grössere Zusammenhang zwischen den Staatsverfassungen und den Zulassungsproblemen zeigte sich sehr deutlich im numerus clausus — Entscheidung des bundesdeutschen Verfassungsgerichtes (beschränkte Zulassung wegen Mangel an Studienplätzen) — und im Rechtsstreit des Obersten Gerichtshofes der Vereinigten Staaten (Vorzugsbehandlung für Bewerber von Minderheitsgruppen). Die Verfassungen beider Länder — das Grundgesetz der Bundesrepublik Deutschland vom 23. Mai 1949 und die Verfassung der Vereinigten Staaten vom 17. September 1798 in ihrer heute gültigen Abänderung — beruhen hinsichtlich der Grundzüge und Ziele des Staates auf den gleichen Entscheidungen. Die Bundesrepublik Deutschland und die USA sind beide demokratische Föderativstaaten, die den sozialen Wohlstand verwirklichen wollen und deren Regierungsform vom Grundsatz des Rechtsstaates bestimmt ist. Dieser findet seinen Ausdruck in der Doktrin der Machtteilung und ist vor allem durch eine Reihe von Menschengrundrechten gesichert. Dieser Artikel gibt eine Übersicht über die Universitäts- und vor allem die Zulassungssysteme beider Länder und analysiert, wie die Verfassungen angewandt werden, um die Probleme der Zulassung zur Hochschulbildung zu lösen. Er bietet Ausgangspunkte für vielversprechende vergleichende (konstitutionelle) Rechtsstudien.
Résumé Le rapport croissant des constitutions avec les problèmes d'accès à l'enseignement supérieur devint très évident à travers le numerus-clausus — décision du tribunal constitutionnel de la République Fédérale d'Allemagne (admission restreinte dûe au manque de places d'études) — et le litige de la Cour Suprême des Etats-Unis (traitement préférentiel accordé aux candidats de groupes minoritaires). Les constitutions des deux pays — la loi fondamentale de la République Fédérale d'Allemagne du 23 mai 1949 et la constitution des Etats-Unis du 17 septembre 1789, telle qu'elle a été amendée — reposent sur les mêmes décisions essentielles concernant les caractéristiques et objectifs essentiels de l'Etat. La République Fédérale d'Allemagne et les Etats-Unis sont des fédérations démocratiques d'états, qui se sont engagées pour la réalisation du bien-être social et dont la forme de gouvernement est définie par le principe de l'autorité de la loi, tel qu'il est exprimé par la doctrine de la séparation des pouvoirs et assuré avant tout par une série de droits fondamentaux de l'homme. Cet article donne une vue d'ensemble des sytèmes universitaires (et surtout des systèmes d'admission à ces universités) des deux pays et analyse comment les constitutions sont appliquées pour résoudre les problèmes d'accès à l'enseignement supérieur. Il mène à des points de départ pour des études juridiques comparées prometteuses (du point de vue constitutionnel).
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14.
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15.
In order to comply with the requirements for a drug listed in China, the study was developed to compare the pharmacokinetics and relative bioavailability of two different enteric formulations of omeprazole (OPZ) in healthy Chinese subjects. A total of 32 volunteers participated in the study. Plasma concentrations were analyzed by nonstereospecific liquid chromatography/tandem mass spectrometric (LC-MS/MS) method. After administration of a single 40-mg dose of the two OPZ formulations, the comparative bioavailability was assessed by calculating individual AUC0−t (the area under the concentration-time curve from time zero to the last measurable concentration), AUC0−∞ (the area under the concentration-time curve extrapolated to infinity), C max (the maximum observed concentration), and T peak (the time to C max) values of OPZ, 5-hydroxyomeprazole (OH-OPZ), and omeprazole sulfone (OPZ-SFN), respectively. The 90% confidence intervals (CIs) of AUC0−t , AUC0−∞, and C max were 85.4%–99.0%/88.8%–98.6%/87.6%–99.4%, 85.5%–99.2%/89.0%–98.6%/88.5%–101.3%, and 72.3%–87.6%/79.6%–91.1%/88.4%–99.1% for OPZ/OH-OPZ/OPZ-SFN, respectively, and T peak values did not differ significantly. In this study, the test formulation of OPZ in fasting healthy Chinese male volunteers met the Chinese bioequivalance standard to the reference formulation based on AUC, C max, and T peak.  相似文献   

16.
In a simultaneous discrimination involving a positive (S+) and a negative (S−) stimulus, positive value appears to transfer from the S+ to the S−. However, negative value does not appear to transfer from the S− to the S+. Instead, when sufficient experience with the contingencies associated with responding to the S− is provided, it appears that the presence of the S− enhances the value of the S+ (i.e., a contrast effect is found). The purpose of the present experiments was to further examine the influence of the S+ on the S− in a simultaneous discrimination (between subjects in Experiment 1 and within subjects in Experiment 2). In both experiments, we found that under typical training conditions, given little direct experience with the value of the S−, value transfers from the S+ to the S−. If sufficient experience with the value of the S− is provided, however, contrast between the S+ and the S− can be demonstrated. Thus, in a simultaneous discrimination, value transfer from the S+ to the S− depends on the animal’s having responded relatively little to the S−.  相似文献   

17.
Abstract

Scoring multipie-choice questions according to the simple scoring systems S1 = R, where R is the number of correct answers, produces an upward bias in scores of poorer students as a result of guessing. The scoring formula conventionally used to adjust for guessing is S2 R-W/(n-1), where W is the number of wrong answers and nis the number of choices per question. However, S2 is based on the unrealistic assumption that on each question the student either knows the correct answer or guesses randomly. On the basis of a more realistic assumption an alternative scoring formula is derived, S4 = [nR + (n-1)Q - Q2/R]/2(n-1), where Q is the number of questions. Compared to S4, the conventional formula (S2) has a downward bias for Q/n < R < Q and the simple formula (S1) has a downward bias for Q/(n-2)<R<Q in addition to its upward bias for R<Q/(n-2).  相似文献   

18.
Functions like loge x, e x , e z and loge z are defined and studied systematically. It is observed thate z is the only complex analytic extension of the real analytic functione x . It is also observed that the power (analyticity) of ez is by choice and the beauty (its derivative is itself) of ez is unexpected.  相似文献   

19.
Let Γd2nbe the set of trees with a given diameter d having a perfect matching,where 2n is the number of vertex.For a tree T in Γd2n,let Pd+1be a diameter of T and q = d m,where m is the number of the edges of perfect matching inPd+1.It can be found that the trees with minimal energy in Γd2nfor four cases q = d 2,d 3,d 4,[d2],and two remarks aregiven about the trees with minimal energy in Γd2nfor2d 33q d 5 and [d2] + 1 q2d 33 1.  相似文献   

20.
In this paper, we consider some polynomial (α,β)-metrics, and discuss the sufficient and necessary conditions for a Finsler metric in the form F=α a1β a2β2/α a4β4/α3 to be projectively flat, where ai (i=1,2,4) are constants with a1≠0, α is a Riemannian metric and β is a 1-form. By analyzing the geodesic coefficients and the divisibility of certain polynomials, we obtain that there are only five projectively flat cases for metrics of this type. This gives a classification for such kind of Finsler metrics.  相似文献   

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