Principal characteristic networks for few-shot learning

Author(s):  
Yan Zheng ◽  
Ronggui Wang ◽  
Juan Yang ◽  
Lixia Xue ◽  
Min Hu
Innovar ◽  
2014 ◽  
Vol 24 (1Spe) ◽  
pp. 141-151 ◽  
Author(s):  
Christian A. Cancino

The literature on born global firms in developed countries has revealed some factors that influence the rapid internationalization of Small and Medium Enterprises (SMEs), such as the technological level of the sector in which the firm participates, psychological and geographical distances from the target markets, and the existence of contact networks. To date, little research has been carried out on this topic for Latin American countries. This paper explores how certain determinants influence Chilean born global firms. A logistic regression model is used to analyze 112 SMEs with regular export activities. The results show that Chilean born global firms are influenced by national and international contact networks that their founders are able to generate. The psychological distance between Chilean SMEs and developed countries in Asia, North America and Europe also influences the internationalization of Chilean SMEs. The principal characteristic of Chilean born global firms is their lack of participation in highly technological sectors, with these SMEs instead being involved in sectors that actively exploit natural resources. The results of this study permit certain public policy recommendations to be made that might boost the development of export SMEs.


2021 ◽  
Vol 26 (1) ◽  
pp. 151-168
Author(s):  
Alexandru Tudorache ◽  
Rodica Luca

We investigate the existence of positive solutions for a nonlinear Riemann–Liouville fractional differential equation with a positive parameter subject to nonlocal boundary conditions, which contain fractional derivatives and Riemann–Stieltjes integrals. The nonlinearity of the equation is nonnegative, and it may have singularities at its variables. In the proof of the main results, we use the fixed point index theory and the principal characteristic value of an associated linear operator. A related semipositone problem is also studied by using the Guo–Krasnosel’skii fixed point theorem.


Zootaxa ◽  
2010 ◽  
Vol 2603 (1) ◽  
pp. 65
Author(s):  
JOSE MARIA AGUILAR-CAMACHO ◽  
JOSE LUIS CARBALLO

Chalinidae is a family of haplosclerid sponges with a delicate reticulated chaonosomal skeleton of uni-, pauci- or multispicular primary lines which are connected by unispicular secondary lines, and with an ectosomal skeleton, if present, formed by a regular hexagonal, unispicular, tangential reticulation (Weerdt 2002). Currently, the family harbors only five valid genera (Chalinula, Cladocroce, Dendrectilla, Dendroxea and Haliclona; Soest et al. 2008), although recent molecular studies suggest that a new rearrangement of the present classification is needed (Redmond et al. 2007). Cladocroce was described by Topsent (1892) from specimens collected in the Atlantic Ocean. The principal characteristic of this genus is the presence of multispicular fiber tracts with a rather dense subisotropic reticulation in between (Weerdt 2002). After that, 10 species have been described, most of them from deep waters and cold climates (Putchakarn et al. 2004). Only three species have been found living in shallow waters: C. aculeata Pulitzer-Finali, 1982 from the Great Barrier Reef, C. burapha Putchakarn et al., 2004 from the Gulf of Thailand, and C. tubulosa Pulitzer-Finali, 1993 from the port of Mombasa, in Kenya. Sponge taxonomy studies in the Mexican Pacific coast have been focused mainly on hadromerids, and particularly on boring sponges (Carballo et al. 2008), and the current knowledge of haplosclerids is very scarce (Cruz-Barraza & Carballo 2006). In this paper, a new species of Cladocroce is described and compared with the other species recorded worldwide. With this contribution the genus Cladocroce increases to 12 species.


2017 ◽  
Vol 2017 ◽  
pp. 1-12
Author(s):  
Qingxue Huang ◽  
Fuqiang Zhao ◽  
Jiaquan Xie ◽  
Lifeng Ma ◽  
Jianmei Wang ◽  
...  

In this paper, a robust, effective, and accurate numerical approach is proposed to obtain the numerical solution of fractional differential equations. The principal characteristic of the approach is the new orthogonal functions based on shifted Legendre polynomials to the fractional calculus. Also the fractional differential operational matrix is driven. Then the matrix with the Tau method is utilized to transform this problem into a system of linear algebraic equations. By solving the linear algebraic equations, the numerical solution is obtained. The approach is tested via some examples. It is shown that the FLF yields better results. Finally, error analysis shows that the algorithm is convergent.


2007 ◽  
Vol 8 (5) ◽  
pp. 479-500 ◽  
Author(s):  
Iñigo Urrutia ◽  
Iñaki Lasagabaster

The territory of the European Union is made up of a rich and wide-ranging universe of languages. The European Union contains a wealth of languages. In its current form there are more than 60 autochthonous languages in the 27 Member States, with widely differing situations and legal statuses. The principal characteristic of the European linguistic diversity is the great heterogeneity of situations and internal legal statuses that the european languages display. Most of the languages of EU are spoken by very few people and few languages are enormously widespread. There are many languages in the EU, which, in spite of having an appreciable number of speakers, do not have official recognition. And there are languages that are co-official or have some sort of official recognition in some areas, but struggle to survive. Multilingualism is one of the defining characteristics of the EU, and it is worth examining how EU law deals with it.


Aorta ◽  
2020 ◽  
Vol 08 (02) ◽  
pp. 025-028
Author(s):  
Guglielmo Saitto ◽  
Antonio Scafuri ◽  
Saimir Kuci ◽  
Alfred Ibrahimi ◽  
Jacob Zeitani

Abstract Background Despite improvements in operative techniques, open thoracoabdominal aortic aneurysm (TAAA) repair is complex and characterized by high mortality and morbidity rate. Less invasive techniques have been developed since 2005 for the treatment of TAAA. Unfortunately, many of these devices require custom fabrication, resulting in delay of many weeks until treatment can be delivered but crucial in critical emergency cases. We present a novel hybrid endovascular and surgical prosthesis, which was tested on five pigs, with the aim of reducing the barrier issues of endovascular therapy in such particular cases. Methods The principal characteristic of the proposed hybrid endovascular prosthesis is to combine a proximal and distal stented zones and, in between, a classical surgical blood tied Dacron prosthesis. The device was tested in five pigs where feasibility of implantation and acute postoperative outcomes were evaluated, including bleeding, bowel ischemia, renal function, and peripheral blood perfusion. Results In all cases, following laparotomy, the endoprosthesis was successfully implanted under fluoroscopy and the surgical prosthesis zone could be easily detected by the radio-opaque markers. No major bleeding or cardiac events occurred throughout preparation and implantation. One hour after prosthesis implantation and surgical anastomoses of all vessels were completed, normal urine output was registered, and no acidosis was detected. Conclusions This novel graft has shown ease of endoprosthesis and visceral vessels implantation without the need of thoracotomy or extracorporeal circulation and may be useful in an emergency setting or high risk and complex anatomy TAAA unsuitable for traditional endovascular aneurysm repair, or to avoid an excess waiting time for a “custom made” prosthesis. The great adaptability of this “hybrid” prosthesis in complex anatomy for the majority of TAAA could be important in high-risk patients and in some difficult situations, such as a high risk of imminent rupture.


2009 ◽  
Vol 1 ◽  
pp. CMT.S1095
Author(s):  
Konstantinos Tziomalos ◽  
Vasilios G. Athyros ◽  
Asterios Karagiannis

Paget's disease of bone (PDB) affects 1%-3% of the population and is associated with increased risk for bone fracture and deformity. Increased osteoclastic activity is the principal characteristic of PDB. Bisphosphonates inhibit osteoclastic activity and represent the mainstay of treatment of PDB. Zoledronic acid, a potent member of this class, normalizes serum alkaline phosphatase (ALP) levels in the majority of patients with PDB and induces sustained disease remissions. It appears to be more effective than both risedronate and pamidronate. However, it is not clear whether bisphosphonates, including zoledronic acid, improve the clinical outcome of patients with PDB. Zoledronic acid was associated with increased risk for atrial fibrillation and osteonecrosis of the jaw in some studies in patients with osteoporosis and cancer, respectively, but not in patients with PDB. Until we have data on the effects of bisphosphonates on clinical outcomes in PDB such as fracture, deformity and osteosarcoma, we must base therapeutic decisions on the data regarding the effects of these agents on disease activity markers (such as serum ALP levels) and bone pain.


Author(s):  
Marti´n Castillo ◽  
Manuel Vite ◽  
L. H. Herna´ndez ◽  
G. Villa ◽  
G. Urriolagoitia

This work is related to failure as a consequence of brittle fracture by abrasion wear. The experimental evidence showed that this situation depends on the size and shape of the abrasive particles and their velocity when they are interacting against the abraded surface. The particle morphology determines the type of failure, in which the crack may propagate. This can be in a lateral and radial direction. Also this situation is observed in low carbon steel (AISI 8620) which has been borided previously. In accordance with the results, the strength is improved by: developing phases, varying thickness of the borided layer and increasing the hardness. At the same time, a hardness analysis of the borided steel and the abrasive surfaces was carried out. The hardness is the principal characteristic which increases the abrasion resistance and the borided improved resistant to wear. However, it has different behaviour according to the type mechanism of abrasion wear (two or three bodies). In the case of three bodies, it is necessary to take into account the superficial characteristic, because over rough surfaces, the hard particles deteriorate the surface of the specimen. On the other hand, on smooth borided surfaces, generally the particles slip without several damage.


1805 ◽  
Vol 95 ◽  
pp. 211-224 ◽  

The discovery of the principle on which the effects of tanning essentially depend, may be partly attributed to Mr. Deyeux, who obtained a substance from galls which he con­sidered as a species of resin, but which was afterwards proved by Mr. Seguin to be that which renders the skins of animals insoluble in water, and imputrescible, and thus to be the principle by which they are converted into leather. The chief characteristic property of this substance was ascertained by Mr. Seguin to be that of precipitating gelatine or glue from water in a state of insolubility, and as it was evi­dently different from any vegetable substance hitherto disco­vered, he gave it the name of tannin.


2006 ◽  
Vol 113 ◽  
pp. 25-28 ◽  
Author(s):  
A. Baskys ◽  
V. Zlosnikas

An asymmetric PI (aPI) controller based on a control algorithm, which is the modification of the PI control method, has been suggested. The principal characteristic feature of the aPI controller is that different values of proportional and integral constants are used at positive and at negative errors. Contrary to the classical PI controller, the proposed controller allows us to improve the positive disturbance rejection of control systems without sacrificing the unit step response dynamics. Results of the investigation of the concrete control systems based on the aPI controller are also presented. Using the dynamic system simulation program Simulink performed the investigation.


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