For voice assistants like Alexa, Google Assistant, and Siri, correctly interpreting users' intentions is of utmost importance. However, users sometimes experience friction with these assistants, caused by errors from different system components or us
er errors such as slips of the tongue. Users tend to rephrase their queries until they get a satisfactory response. Rephrase detection is used to identify the rephrases and has long been treated as a task with pairwise input, which does not fully utilize the contextual information (e.g. users' implicit feedback). To this end, we propose a contextual rephrase detection model ContReph to automatically identify rephrases from multi-turn dialogues. We showcase how to leverage the dialogue context and user-agent interaction signals, including the user's implicit feedback and the time gap between different turns, which can help significantly outperform the pairwise rephrase detection models.
The main objective of this article is to study the influence of static and dynamic
behavior on the occurrence of contact fatigue on spur gear tooth. For this end, a dynamic
model of geared transmission in one degree of freedom, with Crossland crite
rion, are used.
The motion equation is analyzed step par step in the time in order to determine the
dynamic load in all contact points on teeth profile. In this way, the time-varying dynamic
loads on tooth flanks are determined and the subsurface stress components can be derived
from the classic Hertzian theory.
This experiment investigates the effect of aluminum powder as metallic filler of
unsaturated thermosetting polyester resin on the wear rate and its mechanisms according to
time.
The obtained results show that the rate of wear increases with increa
se of time as a
result of increase the temperature generated of friction in all specimens. But when we add
the particles either Aluminum to polyester matrix, the rate of wear reduce as a result of
increase the thermal conductivity of polyester matrix, that leads reduction of the
temperature of contact surface, that leads less wear. We study the mechanisms of wear by
microscope of the worn surface. It found that the predominant mechanisms of wear vary
from adhesive wear at the lowest value of test time to abrasive wear (3- body) at the
highest value of test time.
With the widespread of oil facilities, distribution centers of oil and oil tanks, it has become a must in this article to study the impact of these materials on the physical and mechanical properties of soils, especially at coast to avoid distortions
and changes in the properties of these soils.
We tried in this research to study Clay coastal soil. Two main samples were studied: one polluted with materials leaked from these sites and the other was not. The samples were taken from both types and transported to the laboratories of the Faculty of Civil Engineering at the University in October. In the laboratory, we conducted experiments and evaluated their results.
Our research includes the transmission mechanism of the wind turbine and the calculation of losses, such as loss of mechanical ventilation and friction loss and the loss of lubrication between the gear teeth design. Aims and access to high reliabili
ty work and thus obtain high efficiency and taking advantage of electronic programs, We observed that each type of previous losses have an impact on the overall loss of Gearbox, Depending on the working conditions, For example, at low speeds, loss of friction between the teeth is a great percentage of the total loss, And thus controls the overall efficiency of the transport system, while at high speeds noticed this low percentage of loss, while the loss of lubrication and ventilation rate rose.
This study deals with the friction and wear behavior of coating layers (fluoride and Graphite).The coatings are thermally sprayed on cast iron disks. Sliding is performed between cylindrical pins manufactured from organic brake linings and the coated
and uncoated disks. The coatings are characterized by measuring their hardness, porosity, and corrosion resistance. The corrosion resistance of the coating is tested by exposure to Nacl for 150 hours; the coating layer has had the best corrosion resistance. The friction and wear tests are conducted under contact pressures of (1.5 MPa to 7 MPa) and sliding speeds of 1 and 3 m/sec.
This research aims to facilitate the operation of machining alloyed steel ,which contains specific ratios of nickel, chromium, magnesia, titanium and copper, through three-direction compressed cooling by,
liquid mixture. The mixture is composed of p
ressed water, pressed air, oil, salt and sulfur.
Compressed mixture was used previously but only in one direction. This work uses ternary directions vertical, horizontal and parallel to axis of work piece, which reduces the cost of expensive equipment.
The research studies the reduction in the values of cutting forces and friction factor. In ordinary machining the chips was continuous but our method it is discontinuous. The cutting tools life was increased. the effect of the nozzle diameter was also studied on the friction factor and effect of the angleγ on the cutting forces and friction factor was investigated.
Ligating between brackets and orthodontic wire is considered
one of the important factor affecting the frictional resistance during sliding
movements.
Aim of study: For these reasons this investigation aimed to compare the
friction associating wi
th sliding movement for two types of brackets : selfligating
brackets and conventional brackets ; along stainless steel arch
wires.
