Research on Dynamic Human Motion Analysis Based on Constructing Standard Database

周钰,萍(Zhou Yuping),黄,思行(Huang Sixing) 아시아사회과학학회 2022 International Science Research Vol.2 No.1

二十一世纪动作分析技术一直以来在计算机领域扮演着极其重要的角色, 对它研究的每一次突破都促使着人工智能、机器学习乃至医疗、娱乐媒体领域的巨大发展。而其中对动态人体动作的分析目前已取得部分成果, 如手势控制、动作预测、动作语言翻译等在科研以及市场上已有大规模应用, 但在计算机视觉领域, 动态视频相较于图像增加了时间维度, 使得对于动态图像的处理仍然有许多瓶颈。如何排除多余背景与动作以及精确识别人体动作变化这一难题仍待解决[1]。本文通过对计算机手语翻译这一项目为切入点, 研究如何整合海量标准数据成库与全新算法提高人体动态图像捕捉的精确性。 In 21st century, action recognition are always play an important part in the areas of computer science(CS).Every major breakthrough in this research all brought great development in artificial intelligence(AI), machine learning and even medical field, media.Despite there are some good results of dynamic human action recognition in gesture control, action prediction, action language translation, etc, we still have to solve many problems for dynamic image processing because dynamic images has a new attribute compared with static images, it’s called time dimension.So from this point of view, we need to research how to exclude redundant background elements and actions from an image collected by computer.Now our team try to find some important research results to improve accuracy of motion capture form a project of sign language translation.The specific method is we attempt to integrate massive data to a standard database and find a totally new algorithm to help it.

A Novel Image Encryption Scheme based on the LSM Chaotic System

Congxu Zhu,Yuping Hu,Xinran Zhou 보안공학연구지원센터 2014 International Journal of Security and Its Applicat Vol.8 No.6

The Logistic-Sine map (LSM) chaotic system is introduced by combing the Logistic map (LM) and Sin map (SM). The bifurcation diagrams show that the chaotic range of LSM is much larger than these of the Logistic or Tent maps. Complexity characteristics of Logistic map, Sine map and Logistic-Sine map are analyzed based on C0 algorithm. The results show that C0 complexity value of the LSM is the largest one among the three. Then, a novel image encryption scheme based on the LSM chaotic system was proposed. First, the positions of image pixels are shuffled through swapping positions randomly by using chaotic values. The permutation sequences are ralated to plain-images by introducing the plaintext feedback technique. Second, the diffusion procedure with LSM is introduced to diffuse the image, which is composed of two rounds. The experimental results and analysis by using several security measures show that the proposed image encryption scheme has high security and efficiency.

Study on chitosan/carbon nanotubes modified materials used to enhance the performance of dental binder

Tingyu Tian,Yuping Cai,Shimao Yang,Yanwei Guo,Wei Zhou 한국탄소학회 2023 Carbon Letters Vol.33 No.6

In this study, we successfully grafted chitosan (CS) onto multi-walled carbon nanotubes (MWCNTs) to enhance their properties and potential applications in the biomedical field. FTIR spectroscopy confirmed the successful covalent bonding of CS onto MWCNTs, indicated by the new absorption peak of the amide bond (–CONH–). Thermal analysis showed that the modified MWCNTs (MWCNT-CS) had significant weight loss around 260 °C, suggesting the decomposition of hydroxypropyl chitosan, and confirming its presence in the nanocomposite. SEM images revealed that CS grafting improved the dispersibility of MWCNTs, a property crucial for their use as nanofillers in polymers. Moreover, the micro-tensile bond strength of dentin surface increased with increasing MWCNT-CS concentrations, indicating the potential of MWCNT-CS as a pretreatment for dentin bonding. After simulated aging, the bond strength remained significantly higher for MWCNT-CS groups compared to those without pretreatment. In biocompatibility assessment using the MTT assay, MWCNT-CS showed higher cell viability than MWCNT, suggesting improved biocompatibility after CS modification. The results of this study suggest that CS-modified MWCNTs could be promising materials for applications in dentin bonding, dentin mineralization, bone scaffolding, implants, and drug delivery systems.

Slimy partners: the mucus barrier and gut microbiome in ulcerative colitis

Fang Jian,Wang Hui,Zhou Yuping,Zhang Hui,Zhou Huiting,Zhang Xiaohong 생화학분자생물학회 2021 Experimental and molecular medicine Vol.53 No.-

Ulcerative colitis (UC) is a chronic recurrent intestinal inflammatory disease characterized by high incidence and young onset age. Recently, there have been some interesting findings in the pathogenesis of UC. The mucus barrier, which is composed of a mucin complex rich in O-glycosylation, not only provides nutrients and habitat for intestinal microbes but also orchestrates the taming of germs. In turn, the gut microbiota modulates the production and secretion of mucins and stratification of the mucus layers. Active bidirectional communication between the microbiota and its ‘slimy’ partner, the mucus barrier, seems to be a continually performed concerto, maintaining homeostasis of the gut ecological microenvironment. Any abnormalities may induce a disorder in the gut community, thereby causing inflammatory damage. Our review mainly focuses on the complicated communication between the mucus barrier and gut microbiome to explore a promising new avenue for UC therapy.

Research on vibration control of a transmission tower-line system using SMA-BTMD subjected to wind load

Li Tian,Jingyu Luo,Mengyao Zhou,Wenzhe Bi,Yuping Liu 국제구조공학회 2022 Structural Engineering and Mechanics, An Int'l Jou Vol.82 No.5

As a vital component of power grids, long-span transmission tower-line systems are vulnerable to wind load excitation due to their high flexibility and low structural damping. Therefore, it is essential to reduce wind-induced responses of tower-line coupling systems to ensure their safe and reliable operation. To this end, a shape memory alloy-bidirectional tuned mass damper (SMA-BTMD) is proposed in this study to reduce wind-induced vibrations of long-span transmission tower-line systems. A 1220 m Songhua River long-span transmission system is selected as the primary structure and modeled using ANSYS software. The vibration suppression performance of an optimized SMA-BTMD attached to the transmission tower is evaluated and compared with the effects of a conventional bidirectional tuned mass damper. Furthermore, the impacts of frequency ratios and SMA composition on the vibration reduction performance of the SMA-BTMD are evaluated. The results show that the SMA-BTMD provides superior vibration control of the long-span transmission tower-line system. In addition, changes in frequency ratios and SMA composition have a substantial impact on the vibration suppression effects of the SMABTMD. This research can provide a reference for the practical engineering application of the SMA-BTMD developed in this study.

Aromatase inhibitor regulates letl expression and let7f induced cell migration in endometriosis

( Si Hyun Cho ),( Levent Mutlu ),( Yuping Zhou ),( Hugh Taylor ) 대한산부인과학회 2015 대한산부인과학회 학술대회 Vol.101 No.-

Intestinal mucus components and secretion mechanisms: what we do and do not know

Song Chunyan,Chai Zhenglong,Chen Si,Zhang Hui,Zhang Xiaohong,Zhou Yuping 생화학분자생물학회 2023 Experimental and molecular medicine Vol.55 No.-

Damage to the colon mucus barrier, the first line of defense against microorganisms, is an important determinant of intestinal diseases such as inflammatory bowel disease and colorectal cancer, and disorder in extraintestinal organs. The mucus layer has attracted the attention of the scientific community in recent years, and with the discovery of new mucosal components, it has become increasingly clear that the mucosal barrier is a complex system composed of many components. Moreover, certain components are jointly involved in regulating the structure and function of the mucus barrier. Therefore, a comprehensive and systematic understanding of the functional components of the mucus layer is clearly warranted. In this review, we summarize the various functional components of the mucus layer identified thus far and describe their unique roles in shaping mucosal structure and function. Furthermore, we detail the mechanisms underlying mucus secretion, including baseline and stimulated secretion. In our opinion, baseline secretion can be categorized into spontaneous Ca2+ oscillation-mediated slow and continuous secretion and stimulated secretion, which is mediated by massive Ca2+ influx induced by exogenous stimuli. This review extends the current understanding of the intestinal mucus barrier, with an emphasis on host defense strategies based on fortification of the mucus layer.

Laser-activatable Oxygen Self-supplying Nanoplatform for Efficiently Overcoming Colorectal Cancer Resistance by Enhanced Ferroptosis and Alleviated Hypoxic Microenvironment

Hao Jiang,Hailong Tian,Zhihan Wang,Bowen Li,Rui Chen,Kangjia Luo,Shuaijun Lu,Edouard C. Nice,Wei Zhang,Canhua Huang,Yuping Zhou,Shaojiang Zheng,Feng Gao 한국생체재료학회 2023 생체재료학회지 Vol.27 No.00

Background Colorectal cancer (CRC) is the second most deadly cancer worldwide, with chemo-resistance remaining a major obstacle in CRC treatment. Notably, the imbalance of redox homeostasis-mediated ferroptosis and the modulation of hypoxic tumor microenvironment are regarded as new entry points for overcoming the chemo-resistance of CRC. Methods Inspired by this, we rationally designed a light-activatable oxygen self-supplying chemo-photothermal nanoplatform by co-assembling cisplatin (CDDP) and linoleic acid (LA)-tailored IR820 via enhanced ferroptosis against colorectal cancer chemo-resistance. In this nanoplatform, CDDP can produce hydrogen peroxide in CRC cells through a series of enzymatic reactions and subsequently release oxygen under laser-triggered photothermal to alleviate hypoxia. Additionally, the introduced LA can add exogenous unsaturated fatty acids into CRC cells, triggering ferroptosis via oxidative stress-related peroxidized lipid accumulation. Meanwhile, photothermal can efficiently boost the rate of enzymatic response and local blood flow, hence increasing the oxygen supply and oxidizing LA for enhanced ferroptosis. Results This nanoplatform exhibited excellent anti-tumor efficacy in chemo-resistant cell lines and showed potent inhibitory capability in nude mice xenograft models. Conclusions Taken together, this nanoplatform provides a promising paradigm via enhanced ferroptosis and alleviated hypoxia tumor microenvironment against CRC chemo-resistance.