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Uniruled symplectic divisors [article]

Tian-Jun Li, Yongbin Ruan
2007 arXiv   pre-print
We need to apply the symplectic relative virtual localization theorem of Chen-Li [CL] in our more general setting.  ...  In this case the entire curve lies on the P 1 −bundle side. The type of a Γ − (∅|η) graph in (17) is the type of the company P −graph.  ... 
arXiv:0711.4254v1 fatcat:64aq6z7yznb4ppg44t5p7rxwya

Symplectic Birational Geometry [article]

Tian-Jun Li, Yongbin Ruan
2009 arXiv   pre-print
This is a survey on symplectic birational geometry. In arbitrary dimension, this subject is centered around the notion of uniruledness. In low dimensions, we will also discuss Kodaira dimension and minimality.
arXiv:0906.3265v1 fatcat:gs37nnggqrh7bm2enalecvjafe

Learning Forward Reuse Distance [article]

Pengcheng Li, Yongbin Gu
2020 arXiv   pre-print
Caching techniques are widely used in the era of cloud computing from applications, such as Web caches to infrastructures, Memcached and memory caches in computer architectures. Prediction of cached data can greatly help improve cache management and performance. The recent advancement of deep learning techniques enables the design of novel intelligent cache replacement policies. In this work, we propose a learning-aided approach to predict future data accesses. We find that a powerful
more » ... recurrent neural network model can provide high prediction accuracy based on only a cache trace as input. The high accuracy results from a carefully crafted locality-driven feature design. Inspired by the high prediction accuracy, we propose a pseudo OPT policy and evaluate it upon 13 real-world storage workloads from Microsoft Research. Results demonstrate that the new cache policy improves state-of-art practical policies by up to 19.2% and incurs only 2.3% higher miss ratio than OPT on average.
arXiv:2007.15859v1 fatcat:qn5topsvfrhvzc4dqavkm656oy

Dynamic Memory Induction Networks for Few-Shot Text Classification [article]

Ruiying Geng, Binhua Li, Yongbin Li, Jian Sun, Xiaodan Zhu
2020 arXiv   pre-print
This paper proposes Dynamic Memory Induction Networks (DMIN) for few-shot text classification. The model utilizes dynamic routing to provide more flexibility to memory-based few-shot learning in order to better adapt the support sets, which is a critical capacity of few-shot classification models. Based on that, we further develop induction models with query information, aiming to enhance the generalization ability of meta-learning. The proposed model achieves new state-of-the-art results on
more » ... miniRCV1 and ODIC dataset, improving the best performance (accuracy) by 2~4%. Detailed analysis is further performed to show the effectiveness of each component.
arXiv:2005.05727v1 fatcat:rj2btd5jwzeg5ok2tncubypycu

Assessment of abdominal fat by QCT

Xiao-guang Cheng, Li Wang, Kai Li, Na Li, Yinmin Ma, Yongbin Su, Li Xu
2014 Journal of Orthopaedic Translation  
The relationship between adipose tissue and bone mineral density (BMD) is still being debated. The purpose of our study was to evaluate whether the pattern of abdomen adipose tissue is correlated to trabecular BMD of the lumbar spine. In this cross-sectional study, we studied 89 premenopausal and 231 postmenopausal Chinese women aged 19e86 years. Quantitative computed tomography (QCT) was used to measure the average trabecular BMD of L2eL4, visceral adipose tissue (VAT) and subcutaneous adipose
more » ... tissue (SAT). Height and weight were measured. In the premenopausal sample, multiple linear regression analyses indicated that VAT was negatively correlated to trabecular BMD (P value Z 0.0003) and SAT had no correlation to trabecular BMD. In contrast, there was no significant correlation between VAT and BMD or SAT and BMD in the postmenopausal sample. Our results indicate that VAT may be deleterious to trabecular BMD and SAT has no correlation with BMD in the premenopausal Chinese women, and there is no correlation between abdominal adipose tissue and trabecular BMD in the postmenopausal Chinese women. Brief CV Sarcopenia is the age-related loss of muscle mass, strength and function. Sarcopenia and osteoporosis may commonly co-exist in older adults. Currently, there is no standardized measure of age-related muscle loss over time. Physical performance measures and measures of muscle strength and function are limited by day to day variability, joint pain, poor sleep, depressed mood, and effort. Muscle biopsy is an objective measure of muscle properties, but is an invasive and painful procedure. Musculoskeletal imaging has the potential to advance our ability to objectively and non-invasively study changes in muscle with aging, as well as the response of the muscular system to targeted intervention. Here we will explore using DXA, pQCT, HRpQCT and MRI as tools for objective assessments of muscle mass, and will correlate these parameters to muscle strength and function. We will discuss technical challenges and the need for further research. The confined space of the medullary cavity of bone is filled with trabecular bone (<20%) and bone marrow (>80%). Bone marrow is comprised of fatty marrow and functioning (red) marrow (comprising red blood cells, platelets, lymphocytes, plasma cells and their pre-cursors). An increase in one component of the medullary canal can only occur at the expense of another component. Lifelong changes which occur in the volume of trabecular bone are relatively small compared to those which occur in fatty or red marrow. Marrow fat content increases throughout life from about 20% marrow fat content at 20 years of age to about 60% marrow fat content at 60 years of age. This fat content can be accurately quantified with MR spectroscopy using the fat: water ratio with high reliability. An alternative method is in-phase:out-phase imaging (Dixon technique) though this does not provide spectroscopic detail. In men, marrow fat content is generally about 10% higher than in females, though around the time of the menopause there is a dramatic increase in marrow fat content in females such that after this time, marrow fat content is about 10% higher in females. Marrow fat content increases but what about marrow fat composition e does that change with increasing age or change in BMD. Marrow fat contains both saturated and unsaturated fat and at least 22 different fatty acids. Current clinical MR spectroscopy has the ability to measure the unsaturated and saturated components of marrow fat with the potential for providing near-complete non-invasive spectroscopic detail. Some studies suggest that there is a change in fat composition with osteoporosis, a highly relevant finding since some fats can inhibit bone metabolism in vivo. Studies have begun to look at marrow fat and its Abstracts 207
doi:10.1016/j.jot.2014.07.133 fatcat:wthdveg3rvdcfbmsdquw4gqjrm

An improvement upon unmixed decomposition of an algebraic variety [article]

Zhenyi Ji, Yongbin Li
2010 arXiv   pre-print
Decomposing an algebraic variety into irreducible or equidimensional components is a fundamental task in classical algebraic geometry and has various applications in modern geometry engineering. Several researchers studied the problem and developed efficient algorithms using Gröbner basis method. In this paper, we try to modify the computation of unmixed decomposition of an algebraic variety based on improving the computation of Zero(sat(T)), where T is a triangular set in K[X].
arXiv:1012.1190v1 fatcat:s444set77jgh5eti7bzhytab3u

Laparoscopic total pancreatectomy

Xin Wang, Yongbin Li, Yunqiang Cai, Xubao Liu, Bing Peng
2017 Medicine  
Rationale: Laparoscopic total pancreatectomy is a complicated surgical procedure and rarely been reported. This study was conducted to investigate the safety and feasibility of laparoscopic total pancreatectomy. Patients and Methods: Three patients underwent laparoscopic total pancreatectomy between May 2014 and August 2015. We reviewed their general demographic data, perioperative details, and short-term outcomes. General morbidity was assessed using Clavien-Dindo classification and delayed
more » ... tric emptying (DGE) was evaluated by International Study Group of Pancreatic Surgery (ISGPS) definition. Diagnosis and Outcomes: The indications for laparoscopic total pancreatectomy were intraductal papillary mucinous neoplasm (IPMN) (n = 2) and pancreatic neuroendocrine tumor (PNET) (n = 1). All patients underwent laparoscopic pylorus and spleen-preserving total pancreatectomy, the mean operative time was 490 minutes (range 450-540 minutes), the mean estimated blood loss was 266 mL (range 100-400 minutes); 2 patients suffered from postoperative complication. All the patients recovered uneventfully with conservative treatment and discharged with a mean hospital stay 18 days (range 8-24 days). The short-term (from 108 to 600 days) follow up demonstrated 3 patients had normal and consistent glycated hemoglobin (HbA1c) level with acceptable quality of life. Lessons: Laparoscopic total pancreatectomy is feasible and safe in selected patients and pylorus and spleen preserving technique should be considered. Further prospective randomized studies are needed to obtain a comprehensive understanding the role of laparoscopic technique in total pancreatectomy. Abbreviations: CHA = common hepatic artery, DGE = delayed gastric emptying, GDA = gastroduodenal artery, HbA1c = glycated hemoglobin, IPMN = intraductal papillary mucinous neoplasm, ISGPS = International Study Group of Pancreatic Surgery, PNET = pancreatic neuroendocrine tumor, PPPD = pylorus preserving pancreaticoduodenectomy, PpSpTPD = pylorus-and spleen-preserving total pancreatectomy, PV = portal vein, SMA = superior mesenteric artery, SMV = superior mesenteric vein, SV = splenic vein.
doi:10.1097/md.0000000000005869 pmid:28099344 pmcid:PMC5279089 fatcat:txvqc6s3krccbdcksz6oefbr44

Student's t-Generative Adversarial Networks [article]

Jinxuan Sun, Guoqiang Zhong, Yang Chen, Yongbin Liu, Tao Li, Zhongwen Guo
2018 arXiv   pre-print
Generative Adversarial Networks (GANs) have a great performance in image generation, but they need a large scale of data to train the entire framework, and often result in nonsensical results. We propose a new method referring to conditional GAN, which equipments the latent noise with mixture of Student's t-distribution with attention mechanism in addition to class information. Student's t-distribution has long tails that can provide more diversity to the latent noise. Meanwhile, the
more » ... or in our model implements two tasks simultaneously, judging whether the images come from the true data distribution, and identifying the class of each generated images. The parameters of the mixture model can be learned along with those of GANs. Moreover, we mathematically prove that any multivariate Student's t-distribution can be obtained by a linear transformation of a normal multivariate Student's t-distribution. Experiments comparing the proposed method with typical GAN, DeliGAN and DCGAN indicate that, our method has a great performance on generating diverse and legible objects with limited data.
arXiv:1811.02132v1 fatcat:hlagmwbfvfdnnj5eqg32otaq5i

Some Properties of the Coordinate Rings over Finite Fields [article]

Qinqin Jin, Yongbin Li
2013 arXiv   pre-print
In this paper, we present the Nullstellensatz in case of the coordinate rings of a nonempty subset of Kn where K is a finite field Fq. Some applications of the Nullstellensatz are also discussed.
arXiv:1303.4039v1 fatcat:bx4lkinx4zcpzk7aby4o3rkrju

An Approach to the Jacobian Conjecture [article]

Yongbin Li
2010 arXiv   pre-print
Then z is a nonsingular point of V and lies on a unique irreducible component of V of dimension n − r.Proposition 2.  ... 
arXiv:1012.1197v2 fatcat:gibtlnmkdva6bm4unuf6nyzzt4

Study on the Job Stress of Miners

Li Hongxia, Fan Yongbin, Tian Shuicheng, Liu Fen, Li Huan
2014 Procedia Engineering  
Mine workers' job stress is one of the key causes of serious mine accidents in China. In order to further explain and predict the job stress of miners and develop feasible intervention strategies, this paper presents 7 pressure sources for miners' occupation are proposed and a hypothesis model for miners' working pressure is established. The influence mode and path between job stressors and working pressure is revealed, based on the questionnaire results and structural equation model (SEM).
more » ... des, the hypothesis proposed is validated, and the corresponding intervention countermeasures are put forward. The contribution will provide effective guidance for the prediction and control of miners' job stress.
doi:10.1016/j.proeng.2014.10.431 fatcat:ns4n5qna6za7blavpen52pkmoq

Mobile Internet Information Security Analysis and Countermeasures

Yongbin Zhu, Li Yan, Junsheng Li
2016 TELKOMNIKA (Telecommunication Computing Electronics and Control)  
. : 1 ) 1 Distributed terminal make centralized TELKOMNIKA ISSN: 1693-6930  Mobile Internet Information Security Analysis and Countermeasures (Junsheng Li)  ISSN: 1693-6930 TELKOMNIKA Vol. 14, No.  ... 
doi:10.12928/telkomnika.v14i3a.4417 fatcat:3fotsr4dgbdjjicc62p6s7dopi

Induction Networks for Few-Shot Text Classification [article]

Ruiying Geng, Binhua Li, Yongbin Li, Xiaodan Zhu, Ping Jian, Jian Sun
2019 arXiv   pre-print
Text classification tends to struggle when data is deficient or when it needs to adapt to unseen classes. In such challenging scenarios, recent studies have used meta-learning to simulate the few-shot task, in which new queries are compared to a small support set at the sample-wise level. However, this sample-wise comparison may be severely disturbed by the various expressions in the same class. Therefore, we should be able to learn a general representation of each class in the support set and
more » ... hen compare it to new queries. In this paper, we propose a novel Induction Network to learn such a generalized class-wise representation, by innovatively leveraging the dynamic routing algorithm in meta-learning. In this way, we find the model is able to induce and generalize better. We evaluate the proposed model on a well-studied sentiment classification dataset (English) and a real-world dialogue intent classification dataset (Chinese). Experiment results show that on both datasets, the proposed model significantly outperforms the existing state-of-the-art approaches, proving the effectiveness of class-wise generalization in few-shot text classification.
arXiv:1902.10482v2 fatcat:gyahkqiro5ajxaw7jywmy7ozbe

Computing the decomposition group of a zero-dimensional ideal by elimination method [article]

Yongbin Li
2016 arXiv   pre-print
In this note, we show that the decomposition group Dec(I) of a zero-dimensional radical ideal I in K[x_1,...,x_n] can be represented as the direct sum of several symmetric groups of polynomials based upon using Gröbner bases. The new method makes a theoretical contribution to discuss the decomposition group of I by using Computer Algebra without considering the complexity. As one application, we also present an approach to yield new triangular sets in computing triangular decomposition of polynomial sets P if Dec(< P>) is known.
arXiv:1601.06626v1 fatcat:6phakvrdlfbgnopuv34lh4ncxu

Uniruled Symplectic Divisors

Tian-Jun Li, Yongbin Ruan
2013 Communications in Mathematics and Statistics  
We need to apply the symplectic relative virtual localization theorem of Chen-Li [1] in our more general setting.  ...  In this case the entire curve lies on the P 1 -bundle side. 2 (ii) The connected component of Γ + containing the point insertion is not a fiber curve.  ... 
doi:10.1007/s40304-013-0010-x fatcat:3bugenbruzanlpkuksfea5hbcq
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