Abstract Models for question answering, dialogue agents, and summarization often interpret the meaning of a sentence in a rich context and use that meaning in a new context. Taking excerpts of text can be problematic, as key pieces may not be explici
t in a local window. We isolate and define the problem of sentence decontextualization: taking a sentence together with its context and rewriting it to be interpretable out of context, while preserving its meaning. We describe an annotation procedure, collect data on the Wikipedia corpus, and use the data to train models to automatically decontextualize sentences. We present preliminary studies that show the value of sentence decontextualization in a user-facing task, and as preprocessing for systems that perform document understanding. We argue that decontextualization is an important subtask in many downstream applications, and that the definitions and resources provided can benefit tasks that operate on sentences that occur in a richer context.
The limitations of global resources of fossil and nuclear fuel, has necessitated
an urgent search for alternative sources of energy. Therefore, a new way has to be
found to balance the supply and demand without resorting to coal and gas fuelled
ge
nerators.Environment safety has become very important for any energy system,
Increasing demand of conventional sources has further increases the need and
optimizes cost of non-conventional energy sources.
This paper has analyzed the development of a method for the mathematical
modeling of PV System.behavior of the PV Array with series resistance model are
studied in this paper. Included effects are: temperature dependence, solar radiation
change, diode ideality factor and series resistance influence,and shows the
mathematical modeling of stand-alone PV system and then compare withAnalysis
of Perturb and Observe MPPT and without MPPT simulation of photovoltaic
modules with Matlab/Simulink, And Calculate the increase in efficiency resulting
from the use of technology MPPT.
Building a photovoltaic system is the process of designing,
selecting and calculating the ratings of the equipment’s employed in
the system. This process depends on a variety of factors such as
geographical location, solar irradiation, and load re
quirements. this
paper presents a practical way to calculate the elements and
components of the Stand-Alone PV energy system, And procedure
an economic analysis for the system, will allow GUI designed by
MATLAB knowledge of these components depending on the
efficiency of the Inverter, power solar panels and capacity of
batteries in local market, taking into account the climatic factors and
hours of solar radiation in the system installation area, as well as the
cost of the system and the payback time.
This research aims to studying the plant species diversity in the
oak Maquis at the Eastern versants of the coastal mountains in
Syria, and tries to identify the most important factors affecting this
diversity.
This paper presents a study aimed at improving the performance of the machine, hot steel rolling, and make them conform to international standards, where the study includes two phases: the first includes mathematical modeling and simulation programmi
ng language with a rolling machine. The second phase will include the development and testing of alternative control systems.
I tested the validity of this model through analyzes of performance curves derived from simulated and compared with the values of the curves and tables station real taken from the HSRMP. Through ensure this form to the parameters of the system characteristic variables representing the performance of the real station, this makes it a useful tool allows simulation of plant performance, explain the behavior of variables The test cases in addition to the possibility of change work and operating strategies to improve the overall operation. From this model performed the initial analysis, which proved the possibility of improving the performance of the station to implement the following modifications:
• Reduce the value of hard integrative models associated with the rings are positioned in the final stage.
• unification of all evil ratios for nutrition workshops.
• Revolving transfer is located in the last phase .
Note: HSRMP ( Hot strip rolling Mill plant ) .
This research aims at studying types of PV Systems and their applications in many practical
fields. It also aims at looking into all the components and technical specifications of the
equipment. That's what serves these systems' design and implemen
tation ways through
designing and performing a 12 [KW] Stand- alone PV System. This system is usually used to
supply one of the Green Buildings lighting at night with a back- up grid to achieve a high
reliability in supplying the load. This project also aims at strengthening national qualifications
in the fields of research, development and operation.
In Syria, Barley is grown under rainfed conditions in areas receive less than 300mm
(zones: 2, 3 and 4), which is characterized by limited water availability and large year to
year variability in both total rainfall and distribution . A biotic stre
sses such as drought,
cold, heat , salinity and biotic stresses in addition to low soil fertility and the traditional
methods in agriculture production are the limiting factors for barley productivity in
Syria. In these agro-climatic environments, landraces and their wild relatives are
considered to be very useful as main sources of genetic materials in breeding programs,
also its widely recognized that these materials could be an important source of useful
genetic variation. A study of the genetic structure of landraces may explain to what
extent their adaptation to harsh environments is associated with remote or continuous
introgression of H. spontaneum, and hence indicates an additional avenue to improve
barley yield and its stability in dry areas. The ability of pure lines to sustain yield and
stability in dry areas highly correlated with its heterogeneity. and the mixture of several
lines gave higher productivity than the pure line Arabi asswad.
The objectives of this work were to study the relationships between the genotype and
environment interaction, to evaluate and compare the performance of number of
populations and barleymixtures with pure barley lines under rainfed conditions (Zone2)
in Tel Hadya Research Station (35 Km South of Aleppo city).
The study also aimed to investigate the population dynamic behavior of three pure
lines of barley in pure stands and in mixtures, each pure line being selected from
landraces of three climatically/ ecologically different regions in Syria and Jordan.
The results showed that, in spit of the narrow genetic variation between the
experimental materials, the variations were very wide and obvious for most of the studid
characteristics, mainly on grain yield (3.25-5.17 ton/ha) and biological yield 7.4 – 11.9.
The variation was due to highly productive tillers, 1000 kernel weight and grain size as
well as the morphological and phenological characteristics. The environmental conditions
during the three seasons did not allow the evaluation of the reaction of the Mixtures and
Populations even though mixture 2, which consists of 1: 2: 1 of zanbaka, Arta and Wadi
Al-Hassa showed a very good performance in grain yield, biological yield and many other
characteristics such as grain weight, harvest index, threshing percentage, grain number
and grain weight. It is expected that pure lines will perform better in favorable and
stable conditions and mixtures and some populations will play a very important role
under stressed environments.
