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CSchema： A Downgrading Policy Language for XML Access Control

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Journal of Computer Science & Technology 2007年第1期22卷 44-53页

作者：刘东喜 department of Mathematical informatics University of Tokyo Japan

The problem of regulating access to XML documents has attracted much attention from both academic and industry communities. In existing approaches, the XML elements specified by access policies axe either accessible or inaccessible according to their sensitivity. However, in some cases, the original XML elements are sensitive and inaccessible, but after being processed in some appropriate ways, the results become insensitive and thus accessible. This paper proposes a policy language to accommodate such cases, which can express the downgrading operations on sensitive data in XML documents through explicit calculations on them. The proposed policy language is called calculation-embedded schema （CSchema）, which extends the ordinary schema languages with protection type for protecting sensitive data and specifying downgrading operations. CSchema language has a type system to guarantee the type correctness of the embedded calculation expressions and moreover this type system also generates a security view after type checking a CSchema policy. Access policies specified by CSchema are enforced by a validation procedure, which produces the released documents containing only the accessible data by validating the protected documents against CSchema policies. These released documents are then ready to be accessed by, for instance, XML query engines. By incorporating this validation procedure, other XML processing technologies can use CSchema as the access control module.

关键词： access control programming language security policy type system XML

In-hand haptic perception in dexterous manipulations

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Science China(Information Sciences) 2014年第12期57卷 65-75页

作者： HE JunHu ZHANG JianWei Faculty of Mathematics Informatics and Natural Sciences Department Informatics University of Hamburg

Dexterous in-hand manipulation with multi-finger robotic hands is a hot topic in *** many famous multi-finger robotic hands have been *** a lot of research has been done on them;in-hand manipulation is still a *** of its issues lies in the uncertainty of interaction *** this paper we research robot-object interaction from a novel angle called haptic *** method helps robots acquire the ability to explore the robot-object *** in-hand manipulation tasks,haptic exploration is a process where the robot pushes on in-hand objects slightly in different directions,and meanwhile perceives the haptic feedback to estimate the interaction *** this paper a new single finger push model is proposed for analyzing the haptic feedback,which is similar to traditional impedance control of robot *** this model the stiffness of fingers,the deformation on contact surface,and the change of object’s pos(position and attitude)are ***,a push resistance is given to describe the haptic feedback acquired from a slight ***,real robotic experiments are conducted to verify the feasibility of proposed method.

关键词： in-hand manipulation multi-finger robotic hands dexterous manipulation haptic perception haptic feedback

Leadership and organizational innovation in the third sector:A systematic literature review

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International Journal of Innovation Studies 2020年第2期4卷 51-67页

作者： Francisco José Nave do Adro João Carlos Correia Leitão department of Management and Economics University of Beira InteriorNECE-Research Center in Business SciencesEstrada do SineiroCovilhã6200-209Portugal

The impact of the global recession has served to increase pressure on non-profit organizations *** leadership is an essential component of the success of these *** two-fold purpose of this article is to provide a state-of-the-art overview about the existing literature on leadership and organizational innovation in the third sector,as well as to identify research gaps leading to a research model,which can be used in further empirical *** this,we used the collection of existing literature in the Web of *** 144 articles selected in the database were analysed using the VOS-viewer *** show a concern with the renewal of management bodies and a lack of qualified *** study contributes to the construction of an action agenda leading to the establishment of new leadership and organizational innovation model for the third sector.

关键词： Leadership Organizational innovation Third sector Non-profit organizations

ON A CLASS OF KTHE SEQUENCE SPACES WITH NORMAL STRUCTURE

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Acta Mathematica Scientia 2011年第2期31卷 576-590页

作者： B. Zlatanov department of Mathematics and informatics Plovdiv University

In this note, we investigate the generalized modulus of convexity δ（λ） and the generalized modulus smoothness p（λ）. We obtain some estimates of these moduli for X=lp. We obtain inequalities between WCS coefficient of a KSthe sequence space X and δX（λ）. We show that, for a wide class of class the sequence spaces X, if for some ε∈（0, 9/10] holds δx（e）〉 1/3（1- √3/2）ε, then X has normal structure.

关键词： Weakly convergent sequence coefficient modulus of convexity generalizedmodulus of convexity normal structure

Sums of Primes and Quadratic Linear Recurrence Sequences

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Acta Mathematica Sinica,English Series 2013年第12期29卷 2251-2260页

作者： Artūras DUBICKAS department of Mathematics and informatics Vilnius University

Let u be a sequence of positive integers which grows essentially as a geometric progression. We give a criterion on u in terms of its distribution modulo d, d = 1, 2,..., under which the set of positive integers expressible by the sum of a prime number and an element of u has a positive lower density. This criterion is then checked for some second order linear recurrence sequences. It follows, for instance, that the set of positive integers of the form p ＋ [（2 ＋ √3）n], where p is a prime number and n is a positive integer, has a positive lower density. This generalizes a recent result of Enoch Lee. In passing, we show that the periods of linear recurrence sequences of order m modulo a prime number p cannot be ＂too small＂ for most prime numbers p.

关键词： Romanoff's theorem prime number linear recurrence distribution modulo m asymptotic density

Single-cell technologies: current and near future

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Science China Life Sciences 2025年第01期 1-4页

作者： Chenfei Wang Qi Liu Xiaohui Fan Tieliu Shi Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration Ministry of EducationOrthopedics DepartmentTongji HospitalBioinformatics DepartmentSchool of Life Sciences and TechnologyTongji University Frontier Science Center for Stem Cells School of Life Sciences and TechnologyTongji University Translational Medical Center for Stem Cell Therapy and Institute for Regenerative Medicine Shanghai East HospitalBioinformatics DepartmentSchool of Life Sciences and TechnologyTongji University Research Institute of Intelligent Computing Zhejiang Lab Pharmaceutical informatics Institute College of Pharmaceutical SciencesZhejiang University National Key Laboratory of Chinese Medicine Modernization Innovation Center of Yangtze River DeltaZhejiang University Center for Bioinformatics and Computational Biology Shanghai Key Laboratory of Regulatory Biologythe Institute of Biomedical Sciences and School of Life SciencesEast China Normal University Key Laboratory of Advanced Theory and Application in Statistics and Data Science (MOE) School of StatisticsEast China Normal University

Single-cell technologies enable the indepth exploration of multiple biological hierarchies at the scale of individual cells,which have deepened our knowledge of cellular diversity, tissue organization, and overall organism function(Sun et al.,2024). In 2009, single-cell RNA sequencing(sc RNA-seq) was first developed as a powerful tool to dissect gene expression and uncover transcriptional *** the rapid advancement of technology, single-cell approaches have expanded to encompass other omics, such as genomics, epigenomics, proteomics,and metabolomics.

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Optimal Restoration Scheduling of Damaged Networks Under Uncertain Environment by Using Improved Genetic Algorithm

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Tsinghua Science and Technology 2008年第S1期13卷 400-405页

作者： Hitoshi FURUTA Ken ISHIBASHI Koichiro NAKATSU Shun HOTTA department of informatics Kansai University Graduate School of informatics Kansai University

The purpose of this research is to propose an early restoration for lifeline systems after earthquake disasters. The previous researches show that the optimization of the restoration schedule by using genetic algorithm (GA) is powerful. However, those are not considering the uncertain environment after earthquake disasters. The circumstances of the damage at devastated areas are very changeable due to the aftershock, fire disaster and bad weather. In addition, the restoring works may delay by unexpected accidents. Therefore, it is necessary to obtain the restoration schedule which has robustness, because the actual restoring works could not progress smoothly under the uncertain environment. GA considering uncertainty (GACU) can treat various uncertainties involved, but it is difficult to obtain the robust schedule. In this study, an attempt is made to develop a decision support system of the optimal restoration scheduling by using the improved GACU.

关键词： restoration schedule genetic algorithm uncertainty delay of schedule

Accuracy details in realistic CFD modeling of an industrial centrifugal pump in direct and reverse modes

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Journal of Thermal Science 2010年第6期19卷 491-499页

作者： J.C. Páscoa F. J. Silva J.S. Pinheiro D.J. Martins department of Electromechanical Engineering Center for Aerospace Sciences and Technology University of Beira Interior EFAFLU Bombas e Ventiladores S.A. R. S. Brás 269 Apartado 23 4494-909 Póvoa do Varzim Portugal

Numerical computation of the flowfield inside a pump is herein used as a numerical laboratory, subject to the limitations of modeling assumptions and to experimental verification. A numerical computation of the flow inside a real industrial centrifugal pump is performed that includes a very sophisticated geometry. Conversely to other computations, in this test case no simplification of the geometry was introduced. Numerical computations are obtained using Spalart-Allmaras turbulence model. A detailed analysis of the turbulent flowstructure is performed for the design point and two off design conditions. Additional computations were performed in order to compare the numerical and experimental pump characteristics; these were obtained under normalized testing conditions. Further computations are presented for the pump working in reverse turbine mode (PAT). Detailed analyses of the flow allow a comparison of the internal flow losses when the pump is operating in direct and reverse mode. This is also useful to help in the selection of an adequate pump geometry that can work in both modes with best efficiency.

关键词： centrifugal pump impeller turbulence modeling Spalart-Allmaras PAT

Causal Inference in Graph-Text Constellations:Designing Verbally Annotated Graphs

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Tsinghua Science and Technology 2011年第1期16卷 7-12页

作者： Christopher Habel Cengiz Acartürk department of informatics University of Hamburg informatics Institute Middle East Technical University

Multimodal documents combining language and graphs are wide-spread in print media as well as in electronic media. One of the most important tasks to be solved in comprehending graph-text combinations is construction of causal chains among the meaning entities provided by modalities. In this study we focus on the role of annotation position and shape of graph lines in simple line graphs on causal attributions concerning the event presented by the annotation and the processes （i.e, increases and decreases） and states （no-changes） in the domain value of the graphs presented by the process-lines and state-lines. Based on the experimental investigation of readers＇ inferences under different conditions, guidelines for the design of multimodal documents including text and statistical information graphics are suggested. One suggestion is that the position and the number of verbal annotations should be selected appropriately, another is that the graph line smoothing should be done cautiously.

关键词： causal inference multimodal comprehension human computer interaction