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| 1 | Forecasting and trading cryptocurrencies with machine learning under changing market conditions显示文摘This study examines the predictability of three major cryptocurrencies—bitcoin,ethereum,and litecoin—and the profitability of trading strategies devised upon machine learning techniques(e.g.,linear models,random forests,and support vector machines).The models are validated in a period characterized by unprecedented turmoil and tested in a period of bear markets,allowing the assessment of whether the predictions are good even when the market direction changes between the validation and test periods.The classification and regression methods use attributes from trading and network activity for the period from August 15,2015 to March 03,2019,with the test sample beginning on April 13,2018.For the test period,five out of 18 individual models have success rates of less than 50%.The trading strategies are built on model assembling.The ensemble assuming that five models produce identical signals(Ensemble 5)achieves the best performance for ethereum and litecoin,with annualized Sharpe ratios of 80.17%and 91.35%and annualized returns(after proportional round-trip trading costs of 0.5%)of 9.62%and 5.73%,respectively.These positive results support the claim that machine learning provides robust techniques for exploring the predictability of cryptocurrencies and for devising profitable trading strategies in these markets,even under adverse market conditions. | Helder Sebastiao Pedro Godinho | 2021 | Financial Innovation2021，7，1： | 21 |
| 2 | Functional outcomes of traumatic and non-traumatic rotator cuff tears after arthroscopic repair显示文摘AIM To compare the functional outcomes of traumatic and non-traumatic rotator cuff tears after arthroscopic repair. METHODS Eighty-seven patients with rotator cuff tears following arthroscopic treatment were divided into traumatic and non-traumatic tear groups. Postoperative muscle strength and outcomes using the modified University of California, Los Angeles score were evaluated. Sex, age, affected limb and dominant limb were correlated between groups. Muscle strength of the repaired and unaffected shoulders was compared. Rotator cuff injury size was measured. RESULTS Of the 87 patients who underwent rotator cuff repairs, 35 had traumatic tears and 52 had non-traumatic tears. In patients with non-traumatic tears, the average age was 59 years, 74.5% were female, 96.1% were righthand dominant and 92.3% had their dominant shoulder affected. Patients with traumatic tears were 59.5 yearsold on average, 51.4% were female, 91.4% were righthand dominant and 88.5% had their dominant shoulder affected. No difference existed in the mean modified University of California, Los Angeles score between patients with traumatic tears(33.7) compared with those with non-traumatic tears(32.8). No strength differences were observed between groups: The strength difference between the non-affected and affected sides was 1.21 kg in the non-traumatic group and 1.39 kg in the traumatic group(P = 0.576), while the strength ratio between the non-affected/affected sides was 0.805 in the nontraumatic group and 0.729 in the traumatic group(P = 0.224). CONCLUSION The functional results of traumatic rotator cuff repairs are similar to non-traumatic tears. Both outcomes are satisfactory. | José Jorge Kitagaki Abechain Glaydson Gomes Godinho Fabio Teruo Matsunaga Nicola Archetti Netto Julia Pozzetti Daou Marcel Jun Sugawara Tamaoki | 2017 | World Journal of Orthopedics2017，8，8： | 7 |
| 3 | Alternative tissue engineering scaffolds based on starch: processing methodologies, morphology, degradation and mechanical properties显示文摘 | Gomes M E Godinho J S Tchalamov D | 2002 | Materials Science and Engineering2002，，19： | 2 |
| 4 | Esophagogastric anastomosis with invagination into stomach:New technique to reduce fistula formation显示文摘AIM: To present a new technique of cervical esophagogastric anastomosis to reduce the frequency of fistula formation. METHODS: A group of 31 patients with thoracic and abdominal esophageal cancer underwent cervical esophagogastric anastomosis with invagination of the proximal esophageal stump into the stomach tube. In the region elected for anastomosis, a transverse myotomy of the esophagus was carried out around the entire circumference of the esophagus. Afterwards, a 4-cm long segment of esophagus was invaginated into the stomach and anastomosed to the anterior and the posterior walls. RESULTS: Postoperative minor complications occurred in 22 (70.9%) patients. Four (12.9%) patients had serious complications that led to death. The discharge of saliva was at a lower region, while attempting to leave the anastomosis site out of the alimentary transit. Three (9.7%) patients had fistula at the esophagogastric anastomosis, with minimal leakage of air or saliva and with mild clinical repercussions. No patients had esophago- gastric fistula with intense saliva leakage from either the cervical incision or the thoracic drain. Fibrotic stenosis of anastomoses occurred in seven (22.6%) patients. All these patients obtained relief from their dysphagia with endoscopic dilatation of the anastomosis.CONCLUSION: Cervical esophagogastric anastomosis with invagination of the proximal esophageal stump into the stomach tube presented a low rate of esophagogastric fistula with mild clinical repercussions. | Alexandre Cruz Henriques Carlos Alberto Godinho Roberto Saad Jr Daniel Reis Waisberg Aline Biral Zanon Manlio Basilio Speranzini Jaques Waisberg | 2010 | World Journal of Gastroenterology2010，16，45： | 2 |
| 5 | Analytical evaluation ofthe acoustic insulation provided by double infinite walls 显示文摘 | Antonio J M P Tadeu A Godinho L | 2003 | Journal of Sound and Vibration2003，263，1： | 1 |
| 6 | Nitric oxide in skeletal muscle: role on mitochondrial biogenesis and function显示文摘 | Tengan CH Rodrigues GS Godinho RO | 2012 | Int J Mol Sci2012，13，17： | 1 |
| 7 | Monte carlo estimation of projeet volatility for real options analysi 显示文摘 | Godinho P | 2006 | Journal of Applied Finance2006，16，1： | 1 |
| 8 | A three-dimensional acoustics model using the method of fundamental solutions显示文摘 | Julieta Antonio Antonio Tadeu Luis Godinho | 2008 | Engineering Analysis with Boundary Elements2008，32，： | 1 |
| 9 | Blowing Up Symplectic Orbifolds显示文摘 | Leonor Godinho | 2001 | Annals of Global Analysis and Geometry2001，，2： | 1 |
| 10 | Vascular Endothelial Growth Factor (VEGF) isoform expression and activity in human and murine lung injury显示文摘 | Medford A R L Douglas S K Godinho S I H | 2009 | Respiratory Research2009，10，1： | 1 |
| 11 | Oncogene - like induction of cellular invasion from centrosome amplification 显示文摘 | Godinho SA Picone R | 2014 | Nature2014，，： | 1 |
| 12 | MR spectroscopy aided differentiation:“giant”extra axial tuberculoma masquerading asmen ingioma显示文摘 | Khanna P C Godinho S Patkar D P | 2006 | AJNR Am J Neuroradiol2006，27，7： | 1 |
| 13 | Efficacy of tulathromycin in the treatment of BRD associate with induced mycoplasma bovis infections in young dairy calves显示文摘 | GODINHO K S RAE A WINDSOR G D | 2005 | Vet Ther2005，，： | 1 |
| 14 | Minimum inhibitoryconcentrations of tulathromycin against respiratorybacterial pathogens isola-ted from clinical cases in European cattle and swine and variabilityarisingfrom changes in in vitro methodology显示文摘 | GODINHO K S KEANE S G NANJIANI I A | 2005 | Veterinary Therapeutics2005，6，2： | 1 |
| 15 | An ant colony optimization approach to a permutational flow shop scheduling problem with outsourcing allowed 显示文摘 | TAVARES R F N GODINHO M F | 2011 | Computers & Operations Research2011，38，9： | 1 |
| 16 | Sand aggregation by exopolysaccharide-producing Microbacterium arborescens-AGSB显示文摘 | Godinho A L Bhosle S | 2009 | Curr Microbiol2009，58，6： | 1 |
| 17 | Analyzing the Evidence of an IPR Take -off in China and India显示文摘 | Godinho M Ferreira V | 2012 | Research Policy2012，41，3： | 1 |
| 18 | Trademarks as an Indicator of Innovation and Industrial Change显示文摘 | Sandro Mendonca Tiago Santos Pereira Manuel Mira Godinho | 2004 | Research Policy2004，，33： | 1 |
| 19 | A preliminary study into the effectiveness of stroboscopic light as an aversive stimulus for fish显示文摘 | MESQUITA F D O GODINHO H P AZEVEDO P G D | 2008 | Appl Anim Behav Sci2008，111，34： | 1 |
| 20 | Alternative tissue engineering scaffolds based on starch: processing methodologies, morphology, degradation and mechanical properties显示文摘 | Gomes M E Godinho J S etc | 2002 | Matereials Science and Engineering2002，20，： | 1 |
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