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Strassen's invariance principle for random walk in random environment [article]

Guangyu Yang, Yu Miao, Dihe Hu
2010 arXiv   pre-print
In this paper, we consider random walk in random environment on Z^d (d≥1) and prove the Strassen's strong invariance principle for this model, via martingale argument and the theory of fractional coboundaries of Derriennic and Lin DL, under some conditions which require the variance of the quenched mean has a subdiffusive bound. The results partially fill the gaps between law of large numbers and central limit theorems.
arXiv:1004.2994v1 fatcat:n4ymy3nhg5egxlpbhufdl3infq

A GAN-Based Video Intra Coding

Guangyu Zhong, Jun Wang, Jiyuan Hu, Fan Liang
2021 Electronics  
Intra prediction is a vital part of the image/video coding framework, which is designed to remove spatial redundancy within a picture. Based on a set of predefined linear combinations, traditional intra prediction cannot cope with coding blocks with irregular textures. To tackle this drawback, in this article, we propose a Generative Adversarial Network (GAN)-based intra prediction approach to enhance intra prediction accuracy. Specifically, with the superior non-linear fitting ability, the
more » ... -trained generator of GAN acts as a mapping from the adjacent reconstructed signals to the prediction unit, implemented into both encoder and decoder. Simulation results show that for All-Intra configuration, our proposed algorithm achieves, on average, a 1.6% BD-rate cutback for luminance components compared with video coding reference software HM-16.15 and outperforms previous similar works.
doi:10.3390/electronics10020132 fatcat:fr57knm3sfes7kdcjntq5ds5ju

A Tactile Sensor Decoupling Process

Yuyun Xu, Xuekun Zhuang, Guangyu Hu, Hongqing Pan, Feng Shuang
2018 Sensors  
An improved hybrid homotopy method is proposed to decouple the multi-input model of tactile sensors. The time-embedded homotopy algorithm is proved to be very suitable for solving the problem. Three tracking factors that control the efficiency of the algorithm are studied: tracking operator, stepsize, and accuracy. Trust region methods are applied to track the zero paths instead of the traditional differential algorithm, and a periodic sampling method is proposed to improve the efficiency of
more » ... algorithm. Numerical experiments show that both the robustness and accuracy have received a huge boost after the hybrid algorithm is applied.
doi:10.3390/s18103515 fatcat:pqrqer4r6jdefmhvuhy2zsyfyi

Structural Holes in Directed Fuzzy Social Networks

Renjie Hu, Guangyu Zhang
2014 Journal of Applied Mathematics  
Hu et al.  ...  Liao and Hu [17] applied fuzzy theory to social network and defined undirected fuzzy social network as follows. Definition 1.  ...  Conflict of Interests Renjie Hu and Guangyu Zhang declare that there is no conflict of interests regarding the publication of this paper.  ... 
doi:10.1155/2014/452063 fatcat:i6vefegxhjc7fiay5ufqb6m6zu

Bone marrow adipose amount influences vertebral bone strength

Mo Zhu, Guangyu Hao, Jianming Xing, Su Hu, Dechun Geng, Wen Zhang, Qianqian Wang, Chunhong Hu, Ximing Wang
2018 Experimental and Therapeutic Medicine  
Association of bone marrow adipose and microstructure with bone strength in osteoporotic rats using MR Dixon analysis and micro-CT was evaluated. A total of 40 female Sprague-Dawley rats (6-month-old) were divided randomly into sham-operated (SHAM, n=20) group and ovariectomized (OVX, n=20) group. Fat fraction (FF) was measured by two-point Dixon method with MR imaging at the baseline, 4th, 8th and 12th week, respectively. After sacrifice by anesthesia, the fifth lumbar vertebrae bone was
more » ... d for micro-CT scanning. The biomechanical analysis was also performed. FF in osteoporotic rats significantly increases with time, which correlates with bone microstructure parameters. Compared with biomechanical test, FF showed negative correlation with break stress and elastic modulus. It also suggested that loss of bone mass was accompanied with the increase of adipose tissue content in vertebrae bone marrow. The impairment of bone strength leads to the risk of brittle fracture. In conclusion, the bone marrow adipose amount obtained by MR Dixon and microstructure by micro-CT correlates to bone strength in osteoporotic rats.
doi:10.3892/etm.2018.7003 pmid:30651851 pmcid:PMC6307407 fatcat:xspabydjmjatfkqoqurlqhz7le

18F-fluorodeoxyglucose uptake predicts PKM2 expression in lung adenocarcinoma

Ping Huang, Xiang Zhao, Weiyuan Xiao, Yuqi Dong, Guangyu Hu
2017 OncoTarget  
Positron emission tomography (PET) with 18 F-fluorodeoxyglucose ( 18 F-FDG) is widely used in the management of lung adenocarcinoma. Pyruvate kinase M2 (PKM2) plays a key role in glycolysis. We therefore investigated whether PKM2 expression affects 18 F-FDG uptake in a retrospective analysis of 76 patients who underwent 18 F-FDG PET/computed tomography (CT) scans for staging before surgical resection. We found that PKM2 expression was higher in tumors than peritumoral tissue (p < 0.05).
more » ... with high PKM2 expression had reduced overall (p < 0.05) and disease-free (p < 0.05) survival as compared to those with low PKM2 expression. Comparison of the primary tumor maximum standardized uptake value (SUVmax) between patients with high and low PKM2 expression revealed that the SUVmax was higher in primary tumors with high PKM2 expression than low PKM2 expression (p < 0.05). Multivariate analysis confirmed the association between SUVmax and PKM2 expression (p < 0.05). PKM2 status was predicted with 81.6% accuracy when the SUVmax cutoff value of 6.4. Thus, 18 F-FDG PET/CT is predictive of the PKM2 status in lung adenocarcinoma patients and could aid in determining therapeutic strategies.
doi:10.18632/oncotarget.17377 pmid:28489603 pmcid:PMC5503637 fatcat:5dce76llevgqvnjyecizbluy6y

Natural Plant Selection for Radioactive Waste Remediation [chapter]

Nan Hu, Dexin Ding, Guangyue Li
2014 Radionuclide Contamination and Remediation Through Plants  
In September 2011, an extensive survey was conducted in the uranium mill tailings impoundment in South China (Hu et al. 2014 ).  ...  P. multifida was selected as the candidate for phytoremediation of 226 Ra-contaminated soils (Ding et al. 2012b; Hu et al. 2014) .  ... 
doi:10.1007/978-3-319-07665-2_2 fatcat:dn2v6mwbyndxbj4e7cw2bb5vru

Area-Preserving Surface Flattening Using Lie Advection [chapter]

Guangyu Zou, Jiaxi Hu, Xianfeng Gu, Jing Hua
2011 Lecture Notes in Computer Science  
In this paper, we propose a novel area-preserving surface flattening method, which is rigorous in theory, efficient in computation, yet general in application domains. Leveraged on the state-of-the-art flattening techniques, an infinitesimal area restoring diffeomorphic flow is constructed as a Lie advection of differential 2-forms on the manifold, which yields strict equality of area elements between the flattened and the original surfaces at its final state. With a surface represented by a
more » ... angular mesh, we present how an deterministic algorithm can be faithfully implemented to its continuous counterpart. To demonstrate the utility of this method, we have applied our method to both the cortical hemisphere and the entire cortex. Highly complied results are obtained in a matter of seconds.
doi:10.1007/978-3-642-23629-7_41 fatcat:46phhuzwbzd2lkvj6hw4lkywwi

CaEGCN: Cross-Attention Fusion based Enhanced Graph Convolutional Network for Clustering [article]

Guangyu Huo, Yong Zhang, Junbin Gao, Boyue Wang, Yongli Hu, Baocai Yin
2021 arXiv   pre-print
Yongli Hu received his Ph.D. degree from Beijing University of Technology in 2005. He is a professor in the Faculty of Information Technology at Beijing University of Technology.  ...  0.8624 0.8650 0.8224 0.7559 0.8568 USPS ACC NMI ARI F1 0.7755 0.7871 0.7107 0.7634 0.7623 0.7712 0.6902 0.7552 0.7698 0.7746 0.6984 0.7566 0.7704 0.7794 0.7019 0.7578 Guangyu  ... 
arXiv:2101.06883v1 fatcat:4vwvnnp7hfcq5ewkavlfam2phe

Reliability and validity of an instrument to assess pediatric inpatients' experience of care in China

Guangyu Hu, Changzheng Yuan, Haoming Ren, Jinliang Hu, Mingxia Shang, Kun Wang
2021 Translational Pediatrics  
The Child Hospital Consumer Assessment of Healthcare Providers and Systems (Child HCAHPS) is a standard instrument to measure pediatric inpatients' experience of care. Currently, no Chinese version of the Child HCAHPS exists for Chinese patients. Therefore, this study aimed to create a Chinese version of the Child HCAHPS and investigate its validity and reliability in a Chinese setting. Using the approach recommended in guidelines from the Agency for Healthcare Research and Quality for
more » ... ng HCAHPS surveys, we produced a Chinese version of the Child HCAHPS. A two-month field test with seven hospitals across five provinces in China was performed to assess its validity. Construct validity was assessed using confirmatory factor analysis. We evaluated convergent validity by factor loading, average variance extracted (AVE), and construct reliability (CR). Cronbach's alpha and corrected item-total correlation (CITC) were used to reflect hospital-level unit reliabilities for the survey's item composites. The correlation of the measure score with the overall rating was calculated to evaluate criterion validity. An overall response rate of 63% was achieved, and 2,258 respondents completed the questionnaire. Confirmatory factor analysis showed a comparative fit index (CFI) of 0.905, a non-normed fix index of 0.886, and a root mean square error of approximation (RMSEA) of 0.089. Most items had factor loadings over 0.7. Cronbach's alpha coefficient on the overall level was 0.981, and all measures' CITC exceeded 0.6, demonstrating good to excellent hospital-level reliability of the composite and single-item measures. All composite measures had good to excellent internal consistency reliability (0.716 to 0.994). Item-to-composite correlation ranged from 0.510 to 0.997. Composite-to-composite correlations ranged from 0.488 to 0.997. According to the survey result, for all the 18 composite or single-item measures, mean top-box scores ranged from 56% ("Involving teens in care") to 87% ("Informed in Emergency Room"). The Chinese version of the Child HCAHPS demonstrated acceptable validity and reliability. The application of this tool can help benchmark ongoing healthcare improvement initiatives in China.
doi:10.21037/tp-21-130 pmid:34733667 pmcid:PMC8506060 fatcat:uweicstyhjeltemvzpirxo5n5m

Identification of Aberrantly Expressed miRNAs in Gastric Cancer

Dan Liu, Xiaowei Hu, Hongfeng Zhou, Guangyue Shi, Jin Wu
2014 Gastroenterology Research and Practice  
The noncoding components of the genome, including miRNA, can contribute to pathogenesis of gastric cancer. Their expression has been profiled in many human cancers, but there are a few published studies in gastric cancer. It is necessary to identify novel aberrantly expressed miRNAs in gastric cancer. In this study, the expression profile of 1891 miRNAs was analyzed using a miRCURY array LNA miRNA chip from three gastric cancer tissues and three normal tissues. The expression levels of 4 miRNAs
more » ... were compared by real-time PCR between cancerous and normal tissues. We found that 31 miRNAs are upregulated in gastric cancer(P<0.05)and 10 miRNAs have never been reported by other studies; 30 miRNA are downregulated(P<0.05)in gastric cancer tissues. Gene ontology analysis revealed that those dysregulated miRNAs mainly take part in regulating cell proliferation. The levels of has-miR-105, -213*, -514b, and -548n were tested by real-time PCR and have high levels in cancerous tissues. Here, we report a miRNA profile of gastric cancer and provide new perspective to understand this malignant disease. This novel information suggests the potential roles of these miRNAs in the diagnosis, prognosis biomarkers, or therapy targets of gastric cancer.
doi:10.1155/2014/473817 pmid:24982669 pmcid:PMC4058582 fatcat:drvrwgf7jzgrho7wb5egqe2feu

A Lossless Intra Reference Block Recompression Scheme for Bandwidth Reduction in HEVC-IBC [article]

Jiyuan Hu, Jun Wang, Guangyu Zhong, Jian Cao, Ren Mao, Fan Liang
2021 arXiv   pre-print
The reference frame memory accesses in inter prediction result in high DRAM bandwidth requirement and power consumption. This problem is more intensive by the adoption of intra block copy (IBC), a new coding tool in the screen content coding (SCC) extension to High Efficiency Video Coding (HEVC). In this paper, we propose a lossless recompression scheme that compresses the reference blocks in intra prediction, i.e., intra block copy, before storing them into DRAM to alleviate this problem. The
more » ... roposal performs pixel-wise texture analysis with an edge-based adaptive prediction method yet no signaling for direction in bitstreams, thus achieves a high gain for compression. Experimental results demonstrate that the proposed scheme shows a 72% data reduction rate on average, which solves the memory bandwidth problem.
arXiv:2104.01846v1 fatcat:2ganvxgtojhbvotee26n4yax5u

Cost of Chinese Soft Power Construction and Response to International Cultural Invasion [chapter]

Guangyu Hu
2017 The Cost of Development in China  
The cohesion force and influence of the United Front culture, not only play an important role in carrying out the United Front work and strengthening the United Front forces, but also are the important content of enhancing Chinese culture soft power and constructing the advanced socialistic culture with Chinese characteristics. Enhancing the culture soft power of the United Front is an important carrier of uniting different social and political power, as well as the real need of promoting
more » ... cal civilization, economic growth, and social harmony. Promoting the deepening of reform in an all-round way and realize the Chinese dream, that must make full use of the integration of United Front Culture, play the role of unity and alliance of the United Front culture soft power and unite all forces that might unite including different strata, ethnic, political parties and so on. Therefore, clearing the positioning of the United Front Work of cultural soft power, realizing the value of the United Front Work of cultural soft power and analyzing on approach to enhance the United Front's cultural soft power, which has important strategic and practical for the Chinese united front culture soft power.
doi:10.1007/978-981-10-4175-4_21 fatcat:mxjume5dyjdinp6462fyddmpoi

Are Climate Factors Driving the Contemporary Wildfire Occurrence in China?

Zige Lan, Zhangwen Su, Meng Guo, Ernesto C. Alvarado, Futao Guo, Haiqing Hu, Guangyu Wang
2021 Forests  
Forests 2021 , 2021 12, x FOR PEER REVIEW Figure 4 . 4 Variable importance measures (%IncMSE-Increase in Mean Square Error) of hu factors from Random Forests in different regions (a).  ... 
doi:10.3390/f12040392 fatcat:et7u76biwjashhivdrc6cmos7e

Recent Research on Bioactive Xanthones from Natural Medicine: Garcinia hanburyi

Buyun Jia, Shanshan Li, Xuerui Hu, Guangyu Zhu, Weidong Chen
2015 AAPS PharmSciTech  
Garcinia hanburyi, a tropical plant found in south Asia, has a special long history in the development of both medicine and art. This review mainly focuses on the pharmacy research of the bioactive compounds from the plant in recent years. Preparative and analysis separation methods were introduced. Moreover, the chemical structure of the isolated compounds was included. The studies of biological activities of the caged xanthones from the plant, including antitumor, anti-HIV-1, antibacterial,
more » ... d neurotrophic activities, were reviewed in detail. Furthermore, the mechanisms of its antitumor activity were also reviewed. As mentioned above, some of the xanthones from G. hanburyi can be promising drug candidates, which is worth studying. However, we still need much evidence to prove their efficacy and safety. So, further research is critical for the future application of xanthones from G. hanburyi.
doi:10.1208/s12249-015-0339-4 pmid:26152816 pmcid:PMC4508296 fatcat:wvfkxdvwovd7vmgjlonnietrte
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