Nonlinear robust control of tail-sitter aircrafts in flight mode transitions

© 2018 Elsevier Masson SAS In this paper, a nonlinear robust controller is proposed to deal with the flight mode transition control problem of tail-sitter aircrafts. During the mode transitions, the control problem is challenging due to the high nonlinearities and strong couplings. The tail-sitter aircraft model can be considered as a nominal part with uncertainties including nonlinear terms, parametric uncertainties, and external disturbances. The proposed controller consists of a nominal H∞controller and a nonlinear disturbance observer. The nominal H∞controller based on the nominal model is designed to achieve the desired trajectory tracking performance. The uncertainties are regarded as equivalent disturbances to restrain their influences by the nonlinear disturbance observer. Theoretical analysis and simulation results are given to show advantages of the proposed control method, compared with the standard H∞control approach

Ruokalaympäristön parantamista palvelumuotoilua ja katseenseurantalaitetta hyödyntäen

VTT toteutti katseenseurantalaitetutkimuksen. Tutkimuksen aineisto saatiin käymällä nämä videot läpi. Videoiden läpikäymisten aikana syntyi erinäisiä havainnointeja ruokalasta, ihmisten käyttäytymisestä ravintolaympäristössä ja koehenkilöiden ravitsemuksellisista tottumuksista. Lisäarvoa tutkimukselle toi taustatietolomake, joka jaettiin jokaiselle tutkimukseen osallistujalle. Tutkimustuloksia esitellään tässä opinnäytetyössä. Uusi testi haluttiin toteuttaa kokonaan uudella tavalla. Kenttäkoe katseenseurantalaseilla oli jo toteutettu, joten uusi testi haluttiin tehdä uudella innovatiivisella tavalla. Opinnäytetyöhön on sisällytetty kokeellinen osa, jossa Savonian sisustusarkkitehtiopiskelijat Maria Radova ja Anu Paananen toteuttivat ohjeistetusti kaksi 3D-mallinnusta vastaavasta tilasta. Toinen on Keltasirkun pohjakaavalla toteutettu malli, missä ongelmat ilmenevät, ja toinen 3D-mallinnus, missä on tehty lounasruokailussa havaittujen ongelmakohtien parannuksia ja optimoitu lounaslinjaston käytettävyys. Vertailemalla näitä kahta ruokalaympäristöä voidaan osoittaa palvelumuotoilun arvo tällaisten tilojen parantamisessa. Tavoitteena oli demonstroida katseenseurantaa menetelmänä tilojen ja palvelumuotoilun suunnittelussa ja optimoinnissa, tutkia reaalimaailman ja virtuaalisesti toteutettujen tilojen eroja ja yhtäläisyyksiä katseenseurannan kannalta sekä testata mm. muutosten toimivuutta. Tulokset kertovat, että palvelumuotoilulla on arvoa tällaisten tilojen suunnittelussa ja parantamisessa.VTT conducted a survey using an eye-tracker device. The study material was obtained by analyzing the recorded videos. During the video viewing, observations were made about the behavior of customers in the restaurant environment, and their nutritional habits. Supplementary data was provided for the study using the background information forms, which were distributed to each participant. The research results are presented in this thesis. VTT survey was made with eye tracker glasses so the new test was made with a new innovative way. The thesis includes an experimental part, where the interior architect students, Maria Radova and Anu Paananen, conducted two 3D models at Savonia UAS. A 3D model of the Keltasirkku restaurant was implemented using basic floor plans, illustrating where the actual problems took place, and another 3D model was designed, illustrating the improvements of communication and providing optimized lunch menus. By comparing these two dining environments, the value of service provision can be demonstrated to improve such spaces. The aim was to demonstrate catenary tracking as a method for planning and optimizing space and service design, to study the differences and similarities between the real world and virtually implemented spaces using the eye-tracker and to test, for example, the functionality of the changes. The 3D test was held in the premises of Savonia UAS. Results tell that service design has value planning and optimizing this kind of spaces

Enhanced Electrochemical Performance of Three-Dimensional Ni/Si Nanocable Arrays as a Li-Ion Battery Anode by Nitrogen Doping in the Si Shell

In the present study, a configuration of three-dimensional Ni core/sputtered Si shell nanocable arrays is proposed to alleviate the severe volumetric change of Si during lithiation/delithiation. In particular, the effects of N doping in the Si shell on the electrochemical performance of the nanocable array electrodes have been investigated. It has been found that reduced interfacial resistance, enhanced effective Li ion diffusion coefficient in the active material, and more stable surface passivating layer are likely to be achieved by N doping, leading to an improvement of the rate performance and cyclability when compared to the undoped nanocable array counterpart

Table_1_Factors influencing secondary school students’ reading literacy: An analysis based on XGBoost and SHAP methods.docx

This paper constructs a predictive model of student reading literacy based on data from students who participated in the Program for International Student Assessment (PISA 2018) from four provinces/municipalities of China, i.e., Beijing, Shanghai, Jiangsu and Zhejiang. We calculated the contribution of influencing factors in the model by using eXtreme Gradient Boosting (XGBoost) algorithm and sHapley additive exPlanations (SHAP) values, and get the following findings: (1) Factors that have the greatest impact on students’ reading literacy are from individual and family levels, with school-level factors taking a relative back seat. (2) The most important influencing factors at individual level are reading metacognition and reading interest. (3) The most important factors at family level are ESCS (index of economic, social and cultural status) and language environment, and dialect is negative for reading literacy, whereas proficiency in both a dialect and Mandarin plays a positive role. (4) At the school level, the most important factors are time dedicated to learning and class discipline, and we found that there is an optimal value for learning time, which suggests that reasonable learning time is beneficial, but overextended learning time may make academic performance worse instead of improving it.</p

DataSheet1_Early renal structural changes and potential biomarkers in diabetic nephropathy.docx

Diabetic nephropathy is one of the most serious microvascular complications of diabetes mellitus, with increasing prevalence and mortality. Currently, renal function is assessed clinically using albumin excretion rate and glomerular filtration rate. But before the appearance of micro-albumin, the glomerular structure has been severely damaged. Glomerular filtration rate based on serum creatinine is a certain underestimate of renal status. Early diagnosis of diabetic nephropathy has an important role in improving kidney function and delaying disease progression with drugs. There is an urgent need for biomarkers that can characterize the structural changes associated with the kidney. In this review, we focus on the early glomerular and tubular structural alterations, with a detailed description of the glomerular injury markers SMAD1 and Podocalyxin, and the tubular injury markers NGAL, Netrin-1, and L-FABP in the context of diabetic nephropathy. We have summarized the currently studied protein markers and performed bioprocess analysis. Also, a brief review of proteomic and scRNA-seq method in the search of diabetic nephropathy.</p

Cardiac Versus Non-Cardiac Related Mortality Following Percutaneous Coronary Intervention in Patients with Insulin-Treated Type 2 Diabetes Mellitus: A Meta-Analysis

<p><b>Article full text</b></p><p><br></p><p>The full text of this article can be found here<b>. </b><a href="https://link.springer.com/article/10.1007/s13300-018-0444-y">https://link.springer.com/article/10.1007/s13300-018-0444-y</a></p><p></p><p><br></p><p><b>Provide enhanced content for this article</b></p><p><br></p><p>If you are an author of this publication and would like to provide additional enhanced content for your article then please contact <a href="http://www.medengine.com/Redeem/”mailto:[email protected]”"><b>[email protected]</b></a>.</p><p><br></p><p>The journal offers a range of additional features designed to increase visibility and readership. All features will be thoroughly peer reviewed to ensure the content is of the highest scientific standard and all features are marked as ‘peer reviewed’ to ensure readers are aware that the content has been reviewed to the same level as the articles they are being presented alongside. Moreover, all sponsorship and disclosure information is included to provide complete transparency and adherence to good publication practices. This ensures that however the content is reached the reader has a full understanding of its origin. No fees are charged for hosting additional open access content.</p><p><br></p><p>Other enhanced features include, but are not limited to:</p><p><br></p><p>• Slide decks</p><p>• Videos and animations</p><p>• Audio abstracts</p><p> </p><p>• Audio slides</p> <p><b> </b></p

Data_Sheet_1_Archaea predominate in the ammonia oxidation process in the sediments of the Yap and Mariana Trenches.pdf

Ammonia-oxidizing archaea (AOA) and bacteria (AOB) play an important role in oxidizing ammonia to nitrite in different marine environments; however, their relative contribution to ammonia oxidation in the deep-sea sediments is still largely unknown. Sediment samples from seamounts and the Challenger Deep along the arc of the Yap Trench and the Mariana Trench were used for the investigation of the geographical distribution of AOA and AOB at the cDNA level, with associated potential nitrification rates (PNRs) being measured. AOA was predominated by Candidatus Nitrosopumilus and Nitrosopumilaceae, while Methylophaga was the major group of AOB. Significantly higher transcript abundance of the AOA amoA gene than that of AOB appeared in all samples, corresponding to the much higher RNRs contributed to AOA. Both the total and AOA PNRs were significantly higher in the deeper layers due to the high sensitivity of AOA to ammonia and oxygen than in AOB. In the surface layers, TN and TOC had significant positive and negative effects on the distribution of the AOA amoA gene transcripts, respectively, while NH4+ concentration was positively correlated with the AOB amoA gene transcripts. Our study demonstrated that AOA played a more important role than AOB in the ammonia-oxidizing process that occurred in the sediments of the Yap and Mariana Trenches and would expand the understanding of their ecological contribution to the nitrification process and nitrogen flux of trenches.</p

Average Attrition Index of lower molar at Different Ages.

<p>Average Attrition Index of lower molar at Different Ages.</p

Dynamic distribution curve of attrition.

<p>Dynamic distribution curve of attrition.</p

Polarizable Force Field of Intrinsically Disordered Proteins with CMAP and Reweighting Optimization

Intrinsically disordered proteins (IDPs) are highly structurally heterogeneous without a specific tertiary structure under physiology conditions and play key roles in the development of human diseases. Due to the characteristics of diverse conformations, as one of the important methods, molecular dynamics simulation can complement information for experimental methods. Because of the enrichment for charged amino acids for IDPs, polarizable force fields should be a good choice for the simulation of IDPs. However, current polarizable force fields are limited in sampling conformer features of IDPs. Therefore, a polarizable force field was released and named Drude2019IDP based on Drude2019 with reweighting and grid-based potential energy correction map optimization. In order to evaluate the performance of Drude2019IDP, 16 dipeptides, 18 short peptides, 3 representative IDPs, and 5 structural proteins were simulated. The results show that the NMR observables driven by Drude2019IDP are in better agreement with the experiment data than those by Drude2019 on short peptides and IDPs. Drude2019IDP can sample more diverse conformations than Drude2019. Furthermore, the performances of the two force fields are similar to the sample ordered proteins. These results confirm that the developed Drude2019IDP can improve the reproduction of conformers for intrinsically disordered proteins and can be used to gain insight into the paradigm of sequence-disorder for IDPs