10 research outputs found
Desain Proportional Integral Derrivative (Pid) Controller Pada Model Arm Robot Manipulator
Dalam rangka menuju proses industrialisasi modern di negara Indonesia, harus didukung dengan teknologi yang canggih, contoh nya adalah arm robot manipulator. sebagai pelaku proses produksi sehingga dihasilkan ketepatan,kepresisian, dan kefektifan pada proses produksi. Dengan hal tersebut dibuat sebuah desain kontrol PID pada arm robot manipulator dengan tujuan menghasilkan tingkat presisi dan kestabilan yang lebih baik. Kontroler tersebut didesain, disimulasikan, dan diaplikasikan pada hardware dengan menggunakan software MATLAB/Simulink, kemudian dianalisa kestabilannya dengan metode root locus. Akrilik digunakan sebagai material pada body arm robot. Selanjutnya komponen utama seperti, potensiometer sebagai analog input, motor DC sebagai penggerak setiap link, serta Arduino Mega 2560 sebagai mikrokontroler. Akrilik dipilih karena ringan, kuat dan tahan lama.Dalam penelitian ini akan dilakukan penyempurnaan konstruksi mekanik arm robot manipulator yang sudah ada, pemasangan hardware elektronik, dan pemrograman mikrokontroler dengan menggunakan software MATLAB pada Arduino Toolbox. Dari penelitian yang telah dilakukan, model arm robot manipulator dapat bergerak lebih smooth sesuai dengan input pergerakan potensiometer, dan berada posisi kestabilan saat dianalisa dengan menggunakan root locus
Critical Assessment of the Biomarker Discovery and Classification Methods for Multiclass Metabolomics
Multiclass metabolomics has been widely applied in clinical
practice
to understand pathophysiological processes involved in disease progression
and diagnostic biomarkers of various disorders. In contrast to the
binary problem, the multiclass classification problem is more difficult
in terms of obtaining reliable and stable results due to the increase
in the complexity of determining exact class decision boundaries.
In particular, methods of biomarker discovery and classification have
a significant effect on the multiclass model because different methods
with significantly varied theories produce conflicting results even
for the same dataset. However, a systematic assessment for selecting
the most appropriate methods of biomarker discovery and classification
for multiclass metabolomics is still lacking. Therefore, a comprehensive
assessment is essential to measure the suitability of methods in multiclass
classification models from multiple perspectives. In this study, five
biomarker discovery methods and nine classification methods were assessed
based on four benchmark datasets of multiclass metabolomics. The performance
assessment of the biomarker discovery and classification methods was
performed using three evaluation criteria: assessment a (cluster analysis of sample grouping), assessment b (biomarker consistency in multiple subgroups),
and assessment c (accuracy in the classification
model). As a result, 13 combining strategies with superior performance
were selected under multiple criteria based on these benchmark datasets.
In conclusion, superior strategies that performed consistently well
are suggested for the discovery of biomarkers and the construction
of a classification model for multiclass metabolomics
ECM based on the EIS response of the lithium-ion battery with 2855 mAh capacity and 60% SOC.
<p>ECM based on the EIS response of the lithium-ion battery with 2855 mAh capacity and 60% SOC.</p
Voltage step response test.
<p>(a) Battery voltage and current response; (b) Tracing voltage and tracing error; (c) Voltage tracing error probability.</p
EIS curves of lithium-ion batteries with different SOC and maximum discharge capacities.
<p>EIS curves of lithium-ion batteries with different SOC and maximum discharge capacities.</p
Voltage tracing in UDDS drive cycle test.
<p>(a) Battery current and voltage response in UDDS; (b) Voltage tracing of the UDDS test; (c) Voltage tracing error of the UDDS test; (d) Voltage tracing error probability distribution of the UDDS test.</p
Data_Sheet_1_Discovery of the Consistently Well-Performed Analysis Chain for SWATH-MS Based Pharmacoproteomic Quantification.PDF
<p>Sequential windowed acquisition of all theoretical fragment ion mass spectra (SWATH-MS) has emerged as one of the most popular techniques for label-free proteome quantification in current pharmacoproteomic research. It provides more comprehensive detection and more accurate quantitation of proteins comparing with the traditional techniques. The performance of SWATH-MS is highly susceptible to the selection of processing method. Till now, ≥27 methods (transformation, normalization, and missing-value imputation) are sequentially applied to construct numerous analysis chains for SWATH-MS, but it is still not clear which analysis chain gives the optimal quantification performance. Herein, the performances of 560 analysis chains for quantifying pharmacoproteomic data were comprehensively assessed. Firstly, the most complete set of the publicly available SWATH-MS based pharmacoproteomic data were collected by comprehensive literature review. Secondly, substantial variations among the performances of various analysis chains were observed, and the consistently well-performed analysis chains (CWPACs) across various datasets were for the first time generalized. Finally, the log and power transformations sequentially followed by the total ion current normalization were discovered as one of the best performed analysis chains for the quantification of SWATH-MS based pharmacoproteomic data. In sum, the CWPACs identified here provided important guidance to the quantification of proteomic data and could therefore facilitate the cutting-edge research in any pharmacoproteomic studies requiring SWATH-MS technique.</p
Strategy for Identifying a Robust Metabolomic Signature Reveals the Altered Lipid Metabolism in Pituitary Adenoma
Despite
the well-established connection between systematic metabolic
abnormalities and the pathophysiology of pituitary adenoma (PA), current
metabolomic studies have reported an extremely limited number of metabolites
associated with PA. Moreover, there was very little consistency in
the identified metabolite signatures, resulting in a lack of robust
metabolic biomarkers for the diagnosis and treatment of PA. Herein,
we performed a global untargeted plasma metabolomic profiling on PA
and identified a highly robust metabolomic signature based on a strategy.
Specifically, this strategy is unique in (1) integrating repeated
random sampling and a consensus evaluation-based feature selection
algorithm and (2) evaluating the consistency of metabolomic signatures
among different sample groups. This strategy demonstrated superior
robustness and stronger discriminative ability compared with that
of other feature selection methods including Student’s t-test, partial least-squares-discriminant analysis, support
vector machine recursive feature elimination, and random forest recursive
feature elimination. More importantly, a highly robust metabolomic
signature comprising 45 PA-specific differential metabolites was identified.
Moreover, metabolite set enrichment analysis of these potential metabolic
biomarkers revealed altered lipid metabolism in PA. In conclusion,
our findings contribute to a better understanding of the metabolic
changes in PA and may have implications for the development of diagnostic
and therapeutic approaches targeting lipid metabolism in PA. We believe
that the proposed strategy serves as a valuable tool for screening
robust, discriminating metabolic features in the field of metabolomics