1,023 research outputs found
Well-posedness of the fractional Ginzburg-Landau equation
In this paper, we investigate the well-posedness of the real fractional Ginzburg-Landau equation in several different function spaces, which have been used to deal with the Burgers' equation, the semilinear heat equation, the Navier-Stokes equations, etc. The long time asymptotic behavior of the nonnegative global solutions is also studied in details
Compositor: Bottom-up Clustering and Compositing for Robust Part and Object Segmentation
In this work, we present a robust approach for joint part and object
segmentation. Specifically, we reformulate object and part segmentation as an
optimization problem and build a hierarchical feature representation including
pixel, part, and object-level embeddings to solve it in a bottom-up clustering
manner. Pixels are grouped into several clusters where the part-level
embeddings serve as cluster centers. Afterwards, object masks are obtained by
compositing the part proposals. This bottom-up interaction is shown to be
effective in integrating information from lower semantic levels to higher
semantic levels. Based on that, our novel approach Compositor produces part and
object segmentation masks simultaneously while improving the mask quality.
Compositor achieves state-of-the-art performance on PartImageNet and
Pascal-Part by outperforming previous methods by around 0.9% and 1.3% on
PartImageNet, 0.4% and 1.7% on Pascal-Part in terms of part and object mIoU and
demonstrates better robustness against occlusion by around 4.4% and 7.1% on
part and object respectively. Code will be available at
https://github.com/TACJu/Compositor
TM-NET: Deep Generative Networks for Textured Meshes
We introduce TM-NET, a novel deep generative model for synthesizing textured
meshes in a part-aware manner. Once trained, the network can generate novel
textured meshes from scratch or predict textures for a given 3D mesh, without
image guidance. Plausible and diverse textures can be generated for the same
mesh part, while texture compatibility between parts in the same shape is
achieved via conditional generation. Specifically, our method produces texture
maps for individual shape parts, each as a deformable box, leading to a natural
UV map with minimal distortion. The network separately embeds part geometry
(via a PartVAE) and part texture (via a TextureVAE) into their respective
latent spaces, so as to facilitate learning texture probability distributions
conditioned on geometry. We introduce a conditional autoregressive model for
texture generation, which can be conditioned on both part geometry and textures
already generated for other parts to achieve texture compatibility. To produce
high-frequency texture details, our TextureVAE operates in a high-dimensional
latent space via dictionary-based vector quantization. We also exploit
transparencies in the texture as an effective means to model complex shape
structures including topological details. Extensive experiments demonstrate the
plausibility, quality, and diversity of the textures and geometries generated
by our network, while avoiding inconsistency issues that are common to novel
view synthesis methods
Bis(2-aminopyrimidine-κN 1)dibromidozinc(II)
The title compound, [ZnBr2(C4H5N3)2], is a mononuclear complex in which the ZnII ions have distorted tetrahedral coordination geometry. The ZnII ion binds to two N atoms from two different 2-aminopyrimidine ligands and two bromide ions. N—H⋯N hydrogen bonds link the molecules to form a one-dimensional supramolecular structure. The supramolecular chains are parallel to each other and N—H⋯Br hydrogen bonds link them into a two-dimensional network in the ac plane. Additionally, there are strong π–π interactions [centroid–centroid distance = 3.403 (3) Å]
血浆同型半胱胺酸和D-二聚体水平与急性期脑梗死各亚型的关系
Purpose-To study plasma homocysteine(Hcy)/D-dimer levels in patients with differernt subtype of acute cerebral infarction for early etiology diagnosis. Methods: The subjects were 246 acute cerebral infarction patients in the first 24 hours of stroke onset at our hospital. We divided them into large –artery atherosclerosis(LAA) group(n=66), small artery occlusion(SAO) group(n=76), cardio embolism(CE) group(n=40),stroke of other demonstrated etiology(SOE) group (n=11)and stroke of other undemonstrated etiology(SUE) group(n=51) according to the TOAST classification. Plasma homocysteine and D-diamer were determined within the first 24 hours of admission, the differences in subgroups and control group(n=121) were analyzed. Results:Plasma homocysteine levels in LAA group were signficantly higher than other groups(P<0.05), no differences in non-LAA groups(P>0.05);Plasma D-diamer levels in CE group were significant higher than other groups(P<0.05), no differences in non-CE groups(P>0.05). Conclusions: Plasma homocysteine and D-diamer level are associated with subtypes of acute cerebral infarction, and it contributed to early classification diagnosis and individual treatment of patients with acute cerebral infarction.目的:探讨血浆同型半胱胺酸和D-二聚体在急性期各亚型脑梗死之间的差异,为临床脑梗死亚型的病因学诊断提供理论依据。方法:收集我院246例24 h内发病的脑梗死患者,根据TOAST分型方法进行病因学分型:大动脉粥样硬化性脑卒中(1arge—artery atherosclerosis,LAA;n=66)、小动脉闭塞性脑卒中(small-artery occlusion ,SAO;n=76)、心源性脑栓塞(cardio embolism,CE;n=40)、其他确定原因引发的缺血性脑卒中(stroke of other demonstrated etiology,SOE;n=11)和不明原因的缺血性脑卒中(stroke of other undemonstrated etiology,SUE;n=51)。在入院24小时内测定血浆同型半胱胺酸(Hcy)和D-二聚体(DD)的含量,并与121例对照组进行比较,分析二者在不同亚型脑梗死及对照组之间的差异。结果:LAA组同型半胱氨酸水平明显高于其它4组及对照组(P<0.05) ,其他 4个亚型(SAA、CA、SOE、SUE)及对照组组间比较差异无统计学意义(P>0.05)。CE组血浆D-二聚体含量最高,显著高于其他各亚型组及对照组(P<0.05); 其他 4个亚型(SAA、CA、SOE、SUE)及对照组组间比较差异无统计学意义(P>0.05)。结论:急性期各亚型脑梗死之间血浆同型半胱胺酸和D-二聚体升高程度不同,这对于临床早期分型诊断及个体化治疗有着重要指导意义
Integrated Filtering Microstrip Duplex Antenna Array with High Isolation
This paper presents a 2 × 1 integrated filtering microstrip duplex antenna array with high isolation and same polarization. The antenna consists of two radiating patches fed by two T-shaped probes and a power distributing duplex network (PDDN). The PDDN is composed of two bandstop filters and a 180-degree phase shift power divider. And the PDDN is designed to achieve the functions of power division, frequency selectivity, and port isolation. A Transmission Line (TL) model is adopted to design the PDDN, and the detailed synthesis procedure is presented. For demonstration, the proposed antenna is designed and fabricated. The implemented antenna achieves an average gain of 10 dBi, a cross-polarization ratio of 20 dB, and an isolation of 35 dB within the operation band
A protocol for cooperation to establish an International Gastric Cancer Unit (IGCU)
The following text shows the terms of a protocol for cooperation recently signed between the Department of Digestive Surgery - St. Mary’s Hospital (Terni, Italy; hereinafter “SMH”), the Department of Surgical Sciences - “La Sapienza” University (Rome, Italy; hereinafter “SUR”) and the Department of Gastric Surgery - Fujian Medical University Union Hospital (Fuzhou, Fujian Province, PRC; hereinafter “FMU”)
A protocol for cooperation to establish an International Gastric Cancer Unit (IGCU)
The following text shows the terms of a protocol for cooperation recently signed between The Department of Digestive Surgery - St. Mary’s Hospital (Terni, Italy; hereinafter “SMH”), the Department of Surgical Sciences - “La Sapienza” University (Rome, Italy; hereinafter “SUR”) and the Department of Gastric Surgery - Fujian Medical University Union Hospital (Fuzhou, Fujian Province, PRC; hereinafter “FMU”)
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