79 research outputs found
Integrating Informativeness, Representativeness and Diversity in Pool-Based Sequential Active Learning for Regression
In many real-world machine learning applications, unlabeled samples are easy
to obtain, but it is expensive and/or time-consuming to label them. Active
learning is a common approach for reducing this data labeling effort. It
optimally selects the best few samples to label, so that a better machine
learning model can be trained from the same number of labeled samples. This
paper considers active learning for regression (ALR) problems. Three essential
criteria -- informativeness, representativeness, and diversity -- have been
proposed for ALR. However, very few approaches in the literature have
considered all three of them simultaneously. We propose three new ALR
approaches, with different strategies for integrating the three criteria.
Extensive experiments on 12 datasets in various domains demonstrated their
effectiveness.Comment: Int'l Joint Conf. on Neural Networks (IJCNN), Glasgow, UK, July 202
Evaluate the effects of low-intensity pulsed ultrasound on dental implant osseointegration under type II diabetes
Objective: The objective of this study is to assess the impact of low-intensity pulsed ultrasound (LIPUS) therapy on the peri-implant osteogenesis in a Type II diabetes mellitus (T2DM) rat model.Methods: A total of twenty male Sprague-Dawley (SD) rats were randomly allocated into four groups: Control group, T2DM group, Control-LIPUS group, and T2DM-LIPUS group. Implants were placed at the ratsâ bilateral maxillary first molar sites. The LIPUS treatment was carried out on the rats in Control-LIPUS group and T2DM-LIPUS group, immediately after the placement of the implants, over three consecutive weeks. Three weeks after implantation, the ratsâ maxillae were extracted for micro-CT, removal torque value (RTV), and histologic analysis.Results: Micro-CT analysis showed that T2DM rats experienced more bone loss around implant cervical margins compared with the non-T2DM rats, while the LIPUS treated T2DM rats showed similar bone heights to the non-T2DM rats. Bone-implant contact ratio (BIC) were lower in T2DM rats but significantly improved in the LIPUS treated T2DM rats. Bone formation parameters including bone volume fraction (BV/TV), trabecular thickness (Tb.Th), bone mineral density (BMD) and RTV were all positively influenced by LIPUS treatment. Histological staining further confirmed LIPUSâs positive effects on peri-implant new bone formation in T2DM rats.Conclusion: As an effective and safe treatment in promoting osteogenesis, LIPUS has a great potential for T2DM patients to attain improved peri-implant osteogenesis. To confirm its clinical efficacy and to explore the underlying mechanism, further prospective cohort studies or randomized controlled trials are needed in the future
CPIN:Comprehensive present-interest network for CTR prediction
Personalized recommendation is a popular research direction in both industry and academia. Some research on recommender systems utilizes the usersâ interaction history on items to represent the usersâ interests, which has achieved remarkable success. Usersâ interests in the real world are dynamically changing and have a strong correlation with the interaction sequence. However, sometimes usersâ interests are less relevant to the order of the current interaction sequence, but are more relevant to certain items in the user interaction history. In this paper, a novel deep neural network model is proposed to deal with this situation. The developed model consists of two parts: the present interest relevant to the order of the interaction sequence and the comprehensive interest relevant to some items in the interaction sequence. An ancillary multi-layer perceptron (MLP) is constructed to improve the training of our model. Experiments on public and industrial datasets are conducted. The experimental results show that our proposed model outperforms the state-of-the-art models which demonstrates the effectiveness of the ancillary MLP
Synergistic Effect of Multi-Walled Carbon Nanotubes and Ladder-Type Conjugated Polymers on the Performance of N-Type Organic Electrochemical Transistors
Organic electrochemical transistors (OECTs) have the potential to revolutionize the field of organic bioelectronics. To date, most of the reported OECTs include p-type (semi-)conducting polymers as the channel material, while n-type OECTs are yet at an early stage of development, with the best performing electron-transporting materials still suffering from low transconductance, low electron mobility, and slow response time. Here, the high electrical conductivity of multi-walled carbon nanotubes (MWCNTs) and the large volumetric capacitance of the ladder-type Ï-conjugated redox polymer poly(benzimidazobenzophenanthroline) (BBL) are leveraged to develop n-type OECTs with record-high performance. It is demonstrated that the use of MWCNTs enhances the electron mobility by more than one order of magnitude, yielding fast transistor transient response (down to 15\ua0ms) and high ÎŒC* (electron mobility
7 volumetric capacitance) of about 1 F cmâ1\ua0Vâ1 sâ1. This enables the development of complementary inverters with a voltage gain of >16 and a large worst-case noise margin at a supply voltage of <0.6\ua0V, while consuming less than 1 \ub5W of power
Publisher Correction: An anomalous Hall effect in altermagnetic ruthenium dioxide
In the version of this article initially published, square brackets and parentheses were incorrect in Fig. 1g and throughout Fig. 2 (excepting lower labels in Fig. 2dâf). Further, in the second paragraph of the âConsistency with theoretical predictionâ subsection of the main article, in the text now reading âthe reorientation-field scale, namely, HC = (H2 AE â H2 d) /Hd,â the term âH2 AEâ wasnât shown as squared. The changes have been made in the HTML and PDF versions of the article
Nutritionally Enhanced Staple Food Crops
Crop biofortification is a sustainable and cost-effective strategy to address
malnutrition in developing countries. This review synthesizes the progress
toward developing seed micronutrient-dense cereals and legumes cultivars by
exploiting natural genetic variation using conventional breeding and/or transgenic
technology, and discusses the associated issues to strengthen crop biofortification
research and development. Some major QTL for seed iron and zinc,
seed phosphorus, and seed phytate in common bean, rice,J;md wheat have been
mapped. An iron reductase QTL associated with seed-iron ~QTL is found in common bean where the genes coding for candidate enzymes involved in phytic
acid synthesis have also been mapped. Candidate genes for Ipa co segregate with
mutant phenotypes identified in rice and soybean. The Gpe-B1 locus in wild
emmer wheat accelerates senescence and increases nutrient remobilization
from leaves to developing seeds, and another gene named TtNAM-B1 affecting
these traits has been cloned. Seed iron-dense common bean and rice in Latin
America; seed iron-dense common bean in eastern and southern Africa;....
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