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Front Matter: Volume 11184
2019
Optoelectronic Devices and Integration VIII
Preserved Fulltext
Single-Shot Bidirectional Pyramid Networks for High-Quality Object Detection
[article]
2018
arXiv
pre-print
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Recent years have witnessed many exciting achievements for object detection using deep learning techniques. Despite achieving significant progresses, most existing detectors are designed to detect objects with relatively low-quality prediction of locations, i.e., often trained with the threshold of Intersection over Union (IoU) set to 0.5 by default, which can yield low-quality or even noisy detections. It remains an open challenge for how to devise and train a high-quality detector that can
arXiv:1803.08208v1
fatcat:pz5gra4k3zc4bd7sppzknbse7e
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... ieve more precise localization (i.e., IoU>0.5) without sacrificing the detection performance. In this paper, we propose a novel single-shot detection framework of Bidirectional Pyramid Networks (BPN) towards high-quality object detection, which consists of two novel components: (i) a Bidirectional Feature Pyramid structure for more effective and robust feature representations; and (ii) a Cascade Anchor Refinement to gradually refine the quality of predesigned anchors for more effective training. Our experiments showed that the proposed BPN achieves the best performances among all the single-stage object detectors on both PASCAL VOC and MS COCO datasets, especially for high-quality detections.
Salient Object Ranking with Position-Preserved Attention
[article]
2021
arXiv
pre-print
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Instance segmentation can detect where the objects are in an image, but hard to understand the relationship between them. We pay attention to a typical relationship, relative saliency. A closely related task, salient object detection, predicts a binary map highlighting a visually salient region while hard to distinguish multiple objects. Directly combining two tasks by post-processing also leads to poor performance. There is a lack of research on relative saliency at present, limiting the
arXiv:2106.05047v2
fatcat:bkmvkkcn4fflhatv665qi5cnqe
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... cal applications such as content-aware image cropping, video summary, and image labeling. In this paper, we study the Salient Object Ranking (SOR) task, which manages to assign a ranking order of each detected object according to its visual saliency. We propose the first end-to-end framework of the SOR task and solve it in a multi-task learning fashion. The framework handles instance segmentation and salient object ranking simultaneously. In this framework, the SOR branch is independent and flexible to cooperate with different detection methods, so that easy to use as a plugin. We also introduce a Position-Preserved Attention (PPA) module tailored for the SOR branch. It consists of the position embedding stage and feature interaction stage. Considering the importance of position in saliency comparison, we preserve absolute coordinates of objects in ROI pooling operation and then fuse positional information with semantic features in the first stage. In the feature interaction stage, we apply the attention mechanism to obtain proposals' contextualized representations to predict their relative ranking orders. Extensive experiments have been conducted on the ASR dataset. Without bells and whistles, our proposed method outperforms the former state-of-the-art method significantly. The code will be released publicly available.
Tc17 Cells in Patients with Uterine Cervical Cancer
2014
PLoS ONE
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The existence of Tc17 cells was recently shown in several types of infectious and autoimmune diseases, but their distribution and functions in uterine cervical cancer (UCC) have not been fully elucidated. Methods: The frequency of Tc17 cells in peripheral blood samples obtained from UCC patients, cervical intraepithelial neoplasia (CIN) patients and healthy controls was determined by flow cytometry. Besides, the prevalence of Tc17 cells and their relationships to Th17 cells and Foxp3-expressing
doi:10.1371/journal.pone.0086812
pmid:24523865
pmcid:PMC3921122
fatcat:gbo4hoaz2fg7xh4tdn3ovfygw4
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... T cells as well as microvessels in tissue samples of the patients were assessed by immunohistochemistry staining. Results: Compared to controls, patients with UCC or CIN had a higher proportion of Tc17 cells in both peripheral blood and cervical tissues, but the level of Tc17 cells in UCC tissues was significantly higher than that in CIN tissues. Besides, the increased level of Tc17 in UCC patients was associated with the status of pelvic lymph node metastases and increased microvessel density. Finally, significant correlations of infiltration between Tc17 cells and Th17 cells or Foxp3-expressing T cells were observed in UCC and CIN tissues. Conclusions: This study indicates that Tc17 cell infiltration in cervical cancers is associated with cancer progression accompanied by increased infiltrations of Th17 cells and regulatory T cells as well as promoted tumor vasculogenesis.
Horizontal-to-Vertical Video Conversion
[article]
2021
arXiv
pre-print
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Alongside the prevalence of mobile videos, the general public leans towards consuming vertical videos on hand-held devices. To revitalize the exposure of horizontal contents, we hereby set forth the exploration of automated horizontal-to-vertical (abbreviated as H2V) video conversion with our proposed H2V framework, accompanied by an accurately annotated H2V-142K dataset. Concretely, H2V framework integrates video shot boundary detection, subject selection and multi-object tracking to
arXiv:2101.04051v2
fatcat:x65xhdepvzb4dhe2yxh27warhq
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... the subject-preserving conversion, wherein the key is subject selection. To achieve so, we propose a Rank-SS module that detects human objects, then selects the subject-to-preserve via exploiting location, appearance, and salient cues. Afterward, the framework automatically crops the video around the subject to produce vertical contents from horizontal sources. To build and evaluate our H2V framework, H2V-142K dataset is densely annotated with subject bounding boxes for 125 videos with 132K frames and 9,500 video covers, upon which we demonstrate superior subject selection performance comparing to traditional salient approaches, and exhibit promising horizontal-to-vertical conversion performance overall. By publicizing this dataset as well as our approach, we wish to pave the way for more valuable endeavors on the horizontal-to-vertical video conversion task.
The prevalence of benign prostatic hyperplasia in mainland China: evidence from epidemiological surveys
2015
Scientific Reports
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./1992
NA
Urumchi (U/R)
≥ 60
stratified
cluster
random
Standard national
criteria in China
NA
647
290
44.82 [40.99-
48.65]
5
Zhang et al./1995
NA
Pinghu (U/R)
≥ 40
random
Prostate ...
5826
1761
30.23 [29.05-
31.41]
6
Yu et al./2011
trainee
Baicheng (U)
≥ 60
cluster
random
Criteria from
specialized academic
conferences in China
NA
2826
610
21.59 [20.07-
23.10]
5
Zhang ...
doi:10.1038/srep13546
pmid:26306721
pmcid:PMC4549711
fatcat:3ldl7e2zu5hdtpzphigwmgqbx4
Hybrid silicon photonic devices with two-dimensional materials
2020
Nanophotonics
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Zhang et al. patterned the graphene sheet to be QD-like arrays [98] , and then the defect midgap states band electron trapping centers are formed on the boundary and the surface of graphene QDs. ...
doi:10.1515/nanoph-2020-0093
fatcat:5ni5o74tu5dxtep5mhefxeo2k4
Design Rule of Mach-Zehnder Interferometer Sensors for Ultra-High Sensitivity
2020
Sensors
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A design rule for a Mach-Zehnder interferometer (MZI) sensor is presented, allowing tunable sensitivity by appropriately choosing the MZI arm lengths according to the formula given in this paper. The present MZI sensor designed by this method can achieve an ultra-high sensitivity, which is much higher than any other traditional MZI sensors. An example is given with silicon-on-insulator (SOI) nanowires and the device sensitivity is as high as 106 nm/refractive-index -unit (or even higher), by
doi:10.3390/s20092640
pmid:32380779
pmcid:PMC7248966
fatcat:r6ysmw2v65c5bm5mbll4vxyavy
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... osing the MZI arms appropriately. This makes it possible for one to realize a low-cost optical sensing system with a detection limit as high as 10−6 refractive-index-unit, even when a cheap optical spectrum analyzer with low-resolution (e.g., 1 nm) is used for the wavelength-shift measurement.
Subwavelength silicon photonics for on-chip mode-manipulation
2021
PhotoniX
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AbstractOn-chip mode-manipulation is one of the most important physical fundamentals for many photonic integrated devices and circuits. In the past years, great progresses have been achieved on subwavelength silicon photonics for on-chip mode-manipulation by introducing special subwavelength photonic waveguides. Among them, there are two popular waveguide structures available. One is silicon hybrid plasmonic waveguides (HPWGs) and the other one is silicon subwavelength-structured waveguides
doi:10.1186/s43074-021-00032-2
fatcat:alhjh7n7abcntnoc54zun5eiju
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... Gs). In this paper, we focus on subwavelength silicon photonic devices and the applications with the manipulation of the effective indices, the modal field profiles, the mode dispersion, as well as the birefringence. First, a review is given about subwavelength silicon photonics for the fundamental-mode manipulation, including high-performance polarization-handling devices, efficient mode converters for chip-fiber edge-coupling, and ultra-broadband power splitters. Second, a review is given about subwavelength silicon photonics for the higher-order-mode manipulation, including multimode converters, multimode waveguide bends, and multimode waveguide crossing. Finally, some emerging applications of subwavelength silicon photonics for on-chip mode-manipulation are discussed.
Resonance modes of plasmonic nanorod metamaterials and their applications
2019
AOPC 2019: Nanophotonics
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Plasmonic nanorod metamaterials exhibit transversal and longitudinal resonance modes. It is found that the resonance intensity of the transversal modes (T-Modes) excited by the p-polarized wave is obviously larger than the intensity for the s-polarized wave at the wavelength of the transversal resonance, and the resonance intensity of the longitudinal modes (L-Modes) excited by the s-polarized wave is clearly larger than the intensity for the p-polarized wave at the longitudinal resonance
doi:10.1117/12.2547790
fatcat:hcy4ai5eivdlte6l4s3uo2bykm
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... ngth, indicating a distinct polarization characteristics, which results from excitation of the different resonance modes of surface plasmons at different wavelengths. Moreover, the polarization behavior in near field regions for the different resonance modes has been demonstrated by the electric field distributions of the plasmonic nanorods based on FDTD simulation. In addition, the working wavelength of the polarizer can be tuned by the diameter and length of the silver nanorods in the visible spectral range, higher extinction ratios and lower insertion losses can be achieved based on the different resonance modes associated with the different polarizations. The polarizers will be a promising candidate for its potential applications in integration of nanophotonic devices.
TOND1confers tolerance to nitrogen deficiency in rice
2015
The Plant Journal
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Nitrogen (N), the most important mineral nutrient for plants, is critical to agricultural production systems. N deficiency severely affects rice growth and decreases rice yields. However, excessive use of N fertilizer has caused severe pollution to agricultural and ecological environments. The necessity of breeding of crops that require lower input of N fertilizer has been recognized. Here we identified a major quantitative trait locus on chromosome 12, Tolerance Of Nitrogen Deficiency 1
doi:10.1111/tpj.12736
pmid:25439309
pmcid:PMC4329406
fatcat:7uzbkr6atbairmtuyi3nahpzpa
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... , that confers tolerance to N deficiency in the indica cultivar Teqing. Sequence verification of 75 indica and 75 japonica cultivars from 18 countries and regions demonstrated that only 27.3% of cultivars (41 indica cultivars) contain TOND1, whereas 72.7% of cultivars, including the remaining 34 indica cultivars and all 75 japonica cultivars, do not harbor the TOND1 allele. Over-expression of TOND1 increased the tolerance to N deficiency in the TOND1deficient rice cultivars. The identification of TOND1 provides a molecular basis for breeding rice varieties with improved grain yield despite decreased input of N fertilizers.
Aberrant frequency of TNFR2+ Treg and related cytokines in patients with CIN and cervical cancer
2017
OncoTarget
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Author contributions Baoxia Cui and Daoxin Ma conceived and designed the experiments. Teng Zhang and Jun Jiao collected samples. Teng Zhang, Xinlin Jiao, and Lu Zhao performed the experiments. ...
Teng Zhang, Xinli Tian, and Qing Zhang analyzed the data. Teng Zhang wrote the paper. All authors have read and approved the final manuscript. ...
doi:10.18632/oncotarget.23581
pmid:29435163
pmcid:PMC5797034
fatcat:qrmgq3t3nzhvvglfulf5hlzu6a
On-chip single-mode CdS nanowire laser
2020
Light: Science & Applications
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By integrating a free-standing cadmium sulfide (CdS) nanowire onto a silicon nitride (SiN) photonic chip, we demonstrate a highly compact on-chip single-mode CdS nanowire laser. The mode selection is realized using a Mach-Zehnder interferometer (MZI) structure. When the pumping intensity exceeds the lasing threshold of 4.9 kW/cm2, on-chip single-mode lasing at ~518.9 nm is achieved with a linewidth of 0.1 nm and a side-mode suppression ratio of up to a factor of 20 (13 dB). The output of the
doi:10.1038/s41377-020-0277-0
pmid:32194956
pmcid:PMC7073330
fatcat:od7snybgrndmpomungkwu7pw2u
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... owire laser is channelled into an on-chip SiN waveguide with high efficiency (up to 58%) by evanescent coupling, and the directional coupling ratio between the two output ports can be varied from 90 to 10% by predesigning the coupling length of the SiN waveguide. Our results open new opportunities for both nanowire photonic devices and on-chip light sources and may pave the way towards a new category of hybrid nanolasers for chip-integrated applications.
Proteomics Study of COI1-regulated Proteins inArabidopsisFlower
2010
Journal of Integrative Plant Biology
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Casati P, Zhang X, Burlingame AL, Walbot V (2005) Analysis of leaf proteome after UV-B irradiation in maize lines differing in sensitivity. Mol. Cell Proteomics 4, 1673-1685. ...
doi:10.1111/j.1744-7909.2010.00938.x
pmid:20377703
fatcat:hpctposcgjev3ka6f7ims7fey4
Resistance-Based Connectivity Model to Construct Corridors of the Przewalski's Gazelle (Procapra Przewalskii) in Fragmented Landscape
2021
Sustainability
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Habitat connectivity is indispensable for the survival of species that occupy a small habitat area and have isolated habitat patches from each other. At present, the development of human economy squeezes the living space of wildlife and interferes and hinders the dispersal of species. The Przewalski's gazelle (Procapra przewalskii) is one of the most endangered ungulates, which has experienced a significant reduction in population and severe habitat shrinkage. Although the population of this
doi:10.3390/su13041656
fatcat:56gin3wnzjdspayms6isdchrka
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... cies has recovered to a certain extent, human infrastructure severely hinders the gene flow between several patches of this species. Therefore, we used the maximum entropy (MaxEnt) model to simulate the habitat suitability of the Przewalski's gazelle. In addition, we combined habitat suitability and ecological characteristics of the species to obtain eight habitat patches. Finally, we used the least-cost path (LCP) and circuit theory based on the resistance model to simulate the landscape network of this species. The results showed that habitat patches and connectivity in the east of the Qinghai Lake were crucial to the communication between populations of the Przewalski gazelle, and our study provided important reference for the distribution of important habitats and the construction of corridor between patches. Our study aimed to provide habitat networks and maintain landscape connectivity for achieving the fundamental goal of protecting and revitalizing populations of the Przewalski's gazelle.
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