scholarly journals Embedding Taxonomical, Situational or Sequential Knowledge Graph Context for Recommendation Tasks

2021 ◽  
Author(s):  
Simon Werner ◽  
Achim Rettinger ◽  
Lavdim Halilaj ◽  
Jürgen Lüttin
Keyword(s):  
Network Architecture ◽  
Internal State ◽  
Background Knowledge ◽  
Background Information ◽  
Knowledge Graph ◽  
Situational Context ◽  
The Matrix ◽  
History Of ◽  
Sequential Information ◽  
Vector Representations

Learned latent vector representations are key to the success of many recommender systems in recent years. However, traditional approaches like matrix factorization produce vector representations that capture global distributions of a static recommendation scenario only. Such latent user or item representations do not capture background knowledge and are not customized to a concrete situational context and the sequential history of events leading up to it. This is a fundamentally limiting restriction for many tasks and applications, since the latent state can depend on a) abstract background information, b) the current situational context and c) the history of related observations. An illustrating example is a restaurant recommendation scenario, where a user’s assessment of the situation depends a) on taxonomical information regarding the type of cuisine, b) on situational factors like time of day, weather or location and c) on the subjective individual history and experience of this user in preceding situations. This situation-specific internal state of the user is not captured when using a traditional collaborative filtering approach, since background knowledge, the situational context and the sequential nature of an individual’s history cannot easily be represented in the matrix. In this paper, we investigate how well state-of-the-art approaches do exploit those different dimensions relevant to POI recommendation tasks. Naturally, we represent such a scenario as a temporal knowledge graph and compare plain knowledge graph, a taxonomy and a hypergraph embedding approach, as well as a recurrent neural network architecture to exploit the different context-dimensions of such rich information. Our empirical evidence indicates that the situational context is most crucial to the prediction performance, while the taxonomical and sequential information are harder to exploit. However, they still have their specific merits depending on the situation.

scholarly journals Enhanced Knowledge Graph Embedding by Jointly Learning Soft Rules and Facts

Algorithms ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 265 ◽  
Author(s):  
Jindou Zhang ◽  
Jing Li
Keyword(s):  
Link Prediction ◽  
State Of The Art ◽  
Background Knowledge ◽  
Background Information ◽  
Knowledge Graph ◽  
Logical Inference ◽  
Training Algorithm ◽  
First Order ◽  
Forward Chaining ◽  
Logical Rules

Combining first order logic rules with a Knowledge Graph (KG) embedding model has recently gained increasing attention, as rules introduce rich background information. Among such studies, models equipped with soft rules, which are extracted with certain confidences, achieve state-of-the-art performance. However, the existing methods either cannot support the transitivity and composition rules or take soft rules as regularization terms to constrain derived facts, which is incapable of encoding the logical background knowledge about facts contained in soft rules. In addition, previous works performed one time logical inference over rules to generate valid groundings for modeling rules, ignoring forward chaining inference, which can further generate more valid groundings to better model rules. To these ends, this paper proposes Soft Logical rules enhanced Embedding (SoLE), a novel KG embedding model equipped with a joint training algorithm over soft rules and KG facts to inject the logical background knowledge of rules into embeddings, as well as forward chaining inference over rules. Evaluations on Freebase and DBpedia show that SoLE not only achieves improvements of 11.6%/5.9% in Mean Reciprocal Rank (MRR) and 18.4%/15.9% in HITS@1 compared to the model on which SoLE is based, but also significantly and consistently outperforms the state-of-the-art baselines in the link prediction task.

scholarly journals A Survey of Techniques for Constructing Chinese Knowledge Graphs and Their Applications

2018 ◽  
Vol 10 (9) ◽  
pp. 3245 ◽  
Author(s):  
Tianxing Wu ◽  
Guilin Qi ◽  
Cheng Li ◽  
Meng Wang
Keyword(s):  
Artificial Intelligence ◽  
Question Answering ◽  
Knowledge Representation And Reasoning ◽  
Knowledge Graph ◽  
Development History ◽  
One Belt One Road ◽  
History Of ◽  
Knowledge Graphs ◽  
The One ◽  
The Impact

With the continuous development of intelligent technologies, knowledge graph, the backbone of artificial intelligence, has attracted much attention from both academic and industrial communities due to its powerful capability of knowledge representation and reasoning. In recent years, knowledge graph has been widely applied in different kinds of applications, such as semantic search, question answering, knowledge management and so on. Techniques for building Chinese knowledge graphs are also developing rapidly and different Chinese knowledge graphs have been constructed to support various applications. Under the background of the “One Belt One Road (OBOR)” initiative, cooperating with the countries along OBOR on studying knowledge graph techniques and applications will greatly promote the development of artificial intelligence. At the same time, the accumulated experience of China in developing knowledge graphs is also a good reference to develop non-English knowledge graphs. In this paper, we aim to introduce the techniques of constructing Chinese knowledge graphs and their applications, as well as analyse the impact of knowledge graph on OBOR. We first describe the background of OBOR, and then introduce the concept and development history of knowledge graph and typical Chinese knowledge graphs. Afterwards, we present the details of techniques for constructing Chinese knowledge graphs, and demonstrate several applications of Chinese knowledge graphs. Finally, we list some examples to explain the potential impacts of knowledge graph on OBOR.

Structural Integrity in Merchant Ships

1980 ◽  
Vol 102 (1) ◽  
pp. 15-19 ◽  
Author(s):  
S. T. Rolfe
Keyword(s):  
World War Ii ◽  
Structural Integrity ◽  
Background Information ◽  
World War ◽  
Additional Information ◽  
Marine Industry ◽  
History Of ◽  
Brittle Fractures ◽  
Fracture Control ◽  
Periodic Changes

Since World War II, periodic changes in the fabrication, design, and material specifications for ship steels have been made to preclude brittle fractures. These various changes are described briefly, along with a history of fracture control for ships to serve as background information for a discussion of the present-day structural integrity program for ships in the marine industry. As additional information related to the structural integrity of ship structures, a review of two recent ship failures (e.g., the Ingram Barge in 1972 and the Chester A. Poling in 1977) is presented to demonstrate some of the factors involved in brittle fractures of ships. In both of these failures there were other factors contributing to the final brittle fractures that were more important than the notch toughness levels. These factors are reviewed as the basis for an observation regarding the overall structural integrity of merchant ships.

scholarly journals New data towards the development of a comprehensive taphonomic framework for the Late Jurassic Cleveland-Lloyd Dinosaur Quarry, Central Utah

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3368 ◽  
Author(s):  
Joseph E. Peterson ◽  
Jonathan P. Warnock ◽  
Shawn L. Eberhart ◽  
Steven R. Clawson ◽  
Christopher R. Noto
Keyword(s):  
Late Jurassic ◽  
Data Sets ◽  
Morrison Formation ◽  
Multiple Sources ◽  
Theropod Dinosaurs ◽  
The Matrix ◽  
Significant Step ◽  
Primary Driver ◽  
History Of ◽  
Bone Fragments

The Cleveland-Lloyd Dinosaur Quarry (CLDQ) is the densest deposit of Jurassic theropod dinosaurs discovered to date. Unlike typical Jurassic bone deposits, it is dominated by the presence ofAllosaurus fragilis. Since excavation began in the 1920s, numerous hypotheses have been put forward to explain the taphonomy of CLDQ, including a predator trap, a drought assemblage, and a poison spring. In an effort to reconcile the various interpretations of the quarry and reach a consensus on the depositional history of CLDQ, new data is required to develop a robust taphonomic framework congruent with all available data. Here we present two new data sets that aid in the development of such a robust taphonomic framework for CLDQ. First, x-ray fluorescence of CLDQ sediments indicate elevated barite and sulfide minerals relative to other sediments from the Morrison Formation in the region, suggesting an ephemeral environment dominated by periods of hypereutrophic conditions during bone accumulation. Second, the degree of abrasion and hydraulic equivalency of small bone fragments dispersed throughout the matrix were analyzed from CLDQ. Results of these analyses suggest that bone fragments are autochthonous or parautochthonous and are derived from bones deposited in the assemblage rather than transported. The variability in abrasion exhibited by the fragments is most parsimoniously explained by local periodic re-working and re-deposition during seasonal fluctuations throughout the duration of the quarry assemblage. Collectively, these data support previous interpretations that the CLDQ represents an attritional assemblage in a poorly-drained overbank deposit where vertebrate remains were introduced post-mortem to an ephemeral pond during flood conditions. Furthermore, while the elevated heavy metals detected at the Cleveland-Lloyd Dinosaur Quarry are not likely the primary driver for the accumulation of carcasses, they are likely the result of multiple sources; some metals may be derived from post-depositional and diagenetic processes, and others are potentially produced from an abundance of decomposing vertebrate carcasses. These new data help to support the inferred depositional environment of the quarry as an ephemeral pond, and represent a significant step in understanding the taphonomy of the bonebed and Late Jurassic paleoecology in this region.

scholarly journals “Postface to a Catalogue on Bronze and Stone Inscriptions” by Li Qingzhao

2014 ◽  
Vol 26 (31) ◽  
pp. 68-86
Author(s):  
Anna Dashchenko
Keyword(s):  
Russian Translation ◽  
Chinese Literature ◽  
Background Knowledge ◽  
Point Of View ◽  
High Rank ◽  
Distinctive Features ◽  
History Of ◽  
Chinese And English

This article presents the first Russian translation of Postface to a Catalogue on Bronze and Stone Inscriptions (In Chinese: 金石录后序) with detailed comments. This postface was written in about 1135 by the outstanding Chinese poetess and the founder of Yi-an style Li Qingzhao (1084–1155). Her work is not just a supplement written to a fundamental catalogue compiled by her husband Zhao Mingcheng – a famous epigraphist, collector of ancient objects of art and high-rank official. Postface is a unique work because it introduces two genres: an epitaph in commemoration of her husband and an autobiographical essay. Moreover, it is the first female autobiography in the history of Chinese literature. The number of hieroglyphs in this text varies from 1866 to 1877 in different editions. We have revealed the distinctive features in Chinese and English traditions of commenting and studying the Postface. Chinese works are characterized by dominance of impressionist evaluations, lack of well-defined analytical categories and background knowledge. In addition, English works are characterized by using different approaches to translation of the dates and the reign periods, and by attention to the certain stories and personalities mentioned in the text for better understanding the biography of Li Qingzhao. Different opinions as to when this Postface was written have been analyzed and we have also presented our point of view to this matter.

scholarly journals «GERMAN GRAMMAR» BY JACOB GRIMM AND SCHOOL GERMAN GRAMMAR BOOKS IN THE NINETEENTH-CENTURY GERMANY

2020 ◽  
Vol 23 (4) ◽  
pp. 121-127
Author(s):  
Oleg V. Lukin ◽  
Keyword(s):  
Nineteenth Century ◽  
Secondary Schools ◽  
Native Language ◽  
German Language ◽  
Linguistic Research ◽  
Scientific Approach ◽  
The Matrix ◽  
History Of Linguistics ◽  
History Of ◽  
Xix Century

The article is devoted to the place of J. Grimm's «German grammar» among school German grammar books of the XIX century Germany. The work that appeared at the beginning of the century opened a new page in the history of linguistics – the development of comparative historical language study and the formation of linguistics as a science. The paper provides information on some of the most important German grammar textbooks in Germany of the XIX century, used in secondary schools. They were grammar books by J. Ch. Gottsched, J. Ch. Adelung, J. Ch. A. Heyse, J. G. Radlof, S. G. A. Herling, F. J. Schmitthenner, M. W. Götzinger, etc. The author of the article compares J. Grimm's «German grammar» with the above-mentioned grammar works of that time and puts forward a hypothesis that in the XIX century Germany there appeared an opposition between scientific approach to grammar and that of school grammar books, which, according to the author, reflects dramatically different goals set by both sides. Unlike school textbooks which task is to consistently initiate students into the system of their native language, often on the basis of the matrix created by Alexandrian grammarians, scientific grammar is based on the results of linguistic research and seeks to answer questions about language phenomena. J. Grimm rejected any normative grammar based on logics, that resulting in the aversion on the part of the pedagogical community. Nevertheless, the publication of «German grammar» resulted in appearance of German language textbooks the writers of which tried to build their work on the basis of Grimm’s work, thereby contributing to the popularization of the ideas of the great linguist both among the pedagogical community and the students (A. F. H. Vilmar and K. A. J. Hoffmann).

scholarly journals Structure of the clinical and geriatric depression: Similarities and differences

Psihologija ◽  
2006 ◽  
Vol 39 (4) ◽  
pp. 425-437 ◽  
Author(s):  
Zdenka Novovic ◽  
Petar Colovic ◽  
Maja Babic ◽  
Gordana Misic-Pavkov
Keyword(s):  
Depression Scale ◽  
The Elderly ◽  
Clinical Depression ◽  
Aged People ◽  
Method Of Maximum Likelihood ◽  
Significant Difference ◽  
Clinically Depressed ◽  
The Matrix ◽  
History Of ◽  
Negative Estimate

Studies demonstrating the uniqueness of depression in old age are numerous, but conclusions on the fact if the problems of the elderly people cause depression or if they are a part of depression are not unique. The aim of this paper is to compare the structure of depression of old people without the history of mental illness and middle-aged people treated for depression. The sample consists of 82 healthy inmates of different Homes for the Aged and 78 patients diagnosed with some sort of affective disorder. A depression has been assessed with the shorten version of the MMPI D-scale. The structure of the geriatric and clinical depression has been compared with the method of maximum likelihood, over the matrix of co-variances of answers on the items on the depression scale. The results point out to the statistically significant difference in the structure of depression of the old and clinically depressed individuals. However, half of the items of the D-scale have significant loadings on the factor of depression in both groups. The essence of the depression in both samples is made of cognitive subject matters, depressive affect, decline of motivation and a negative estimate of one's basic abilities. Symptoms concerning low self-esteem, experiencing cognitive deficit, energy and impaired physical health have been significant in describing the clinical depression, while a feeling of reduced positive stimulation and the affective liability is typical for the depression of geriatric sample. The conclusion is that, despite the differences, there is a common core of symptoms that makes the essence of depression, apart from the samples.

scholarly journals Thermal History of Matrix Forsterite Grains from Murchison Based on High-resolution Tomography

2021 ◽  
Vol 922 (2) ◽  
pp. 256
Author(s):  
Giulia Perotti ◽  
Henning O. Sørensen ◽  
Henning Haack ◽  
Anja C. Andersen ◽  
Dario Ferreira Sanchez ◽  
...  
Keyword(s):  
High Resolution ◽  
Electron Density ◽  
Chemical Compositions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Density Maps ◽  
Thermally Processed ◽  
The Matrix ◽  
History Of ◽  
Chondrule Formation

Abstract Protoplanetary disks are dust- and gas-rich structures surrounding protostars. Depending on the distance from the protostar, this dust is thermally processed to different degrees and accreted to form bodies of varying chemical compositions. The primordial accretion processes occurring in the early protoplanetary disk such as chondrule formation and metal segregation are not well understood. One way to constrain them is to study the morphology and composition of forsteritic grains from the matrix of carbonaceous chondrites. Here, we present high-resolution ptychographic X-ray nanotomography and multimodal chemical microtomography (X-ray diffraction and X-ray fluorescence) to reveal the early history of forsteritic grains extracted from the matrix of the Murchison CM2.5 chondrite. The 3D electron density maps revealed, at unprecedented resolution (64 nm), spherical inclusions containing Fe–Ni, very little silica-rich glass and void caps (i.e., volumes where the electron density is consistent with conditions close to vacuum) trapped in forsterite. The presence of the voids along with the overall composition, petrological textures, and shrinkage calculations is consistent with the grains experiencing one or more heating events with peak temperatures close to the melting point of forsterite (∼2100 K), and subsequently cooled and contracted, in agreement with chondrule-forming conditions.

scholarly journals Human genetic basis of interindividual variability in the course of infection

2015 ◽  
Vol 112 (51) ◽  
pp. E7118-E7127 ◽  
Author(s):  
Jean-Laurent Casanova
Keyword(s):  
Infectious Diseases ◽  
20Th Century ◽  
Genetic Basis ◽  
Human Genetics ◽  
Interindividual Variability ◽  
Background Information ◽  
Experimental Conditions ◽  
Life Threatening ◽  
History Of ◽  
The 19Th Century

The key problem in human infectious diseases was posed at the turn of the 20th century: their pathogenesis. For almost any given virus, bacterium, fungus, or parasite, life-threatening clinical disease develops in only a small minority of infected individuals. Solving this infection enigma is important clinically, for diagnosis, prognosis, prevention, and treatment. Some microbes will inevitably remain refractory to, or escape vaccination, or chemotherapy, or both. The solution also is important biologically, because the emergence and evolution of eukaryotes alongside more rapidly evolving prokaryotes, archaea, and viruses posed immunological challenges of an ecological and evolutionary nature. We need to study these challenges in natural, as opposed to experimental, conditions, and also at the molecular and cellular levels. According to the human genetic theory of infectious diseases, inborn variants underlie life-threatening infectious diseases. Here I review the history of the field of human genetics of infectious diseases from the turn of the 19th century to the second half of the 20th century. This paper thus sets the scene, providing the background information required to understand and appreciate the more recently described monogenic forms of resistance or predisposition to specific infections discussed in a second paper in this issue.

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