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Benchmarking visual SLAM methods in mirror environments

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Computational Visual Media 2024年第2期10卷 215-241页

作者： Peter Herbert Jing Wu Ze Ji yu-kun Lai School of Computer Science and Informatics Cardiff UniversityAbacws BuildingSenghennydd RdCardiff CF244AGUK School of Engineering Cardiff UniversityQueen’s BuildingsThe ParadeCardiff CF243AAUK

Visual simultaneous localisation and mapping(vSLAM)finds applications for indoor and outdoor navigation that routinely subjects it to visual complexities,particularly mirror *** effect of mirror presence(time visible and its average size in the frame)was hypothesised to impact localisation and mapping performance,with systems using direct techniques expected to perform ***,a dataset,MirrEnv,of image sequences recorded in mirror environments,was collected,and used to evaluate the performance of existing representative *** ORB-SLAM3 and BundleFusion appear to show moderate degradation of absolute trajectory error with increasing mirror duration,whilst the remaining results did not show significantly degraded localisation *** mesh maps generated proved to be very inaccurate,with real and virtual reflections colliding in the reconstructions.A discussion is given of the likely sources of error and robustness in mirror environments,outlining future directions for validating and improving vSLAM performance in the presence of planar *** MirrEnv dataset is available at https://***/10.17035/d.2023.0292477898.

关键词： visual simultaneous localisation and mapping(vSLAM) mirror localisation mapping reflection datase

The influence of yttrium and manganese additions on the degradation and biocompatibility of magnesium-zinc-based alloys:In vitro and in vivo studies

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Journal of Magnesium and Alloys 2024年第2期12卷 608-624页

作者： Lei Shi Yang Yan Chun-sheng Shao kun yu Bo Zhang Liang-jian Chen Third Xiangya Hospital Central South UniversityChangsha 410013China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China School of Materials Science and Engineering Central South UniversityChangsha 410083China Department of Mechanical Engineering City University of Hong KongHong KongChina

The repair and regeneration of bone defects are highly challenging orthopedic ***,Mg-based implants have gained popularity due to their unique biodegradation and elastic modulus similar to that of human *** aim of our study is to develop a magnesium alloy with a controllable degradation that can closely match bone tissue to help injuries heal in vivo and avoid cytotoxicity caused by a sudden increase in ion *** this study,we prepared and modified Mg-3Zn,Mg-3Zn-1Y,and Mg-2Zn-1Mn by hot extrusion,and used Mg-2.5Y-2.5Nd was as a *** then investigated the effect of additions of Y and Mn on alloys'*** results show that Mn and Y can improve not only compression strength but also corrosion *** alloy Mg-2Zn-1Mn demonstrated good cytocompatibility in vitro,and for this reason we selected it for implantation in *** degraded Mg-2Zn-1Mn implanted a bone defect area did not cause obvious rejection and inflammatory reaction,and the degradation products left no signs of damage to the heart,liver,kidney,or ***,we find that Mg-2Zn-1Mn can promote an osteoinductive response in vivo and the formation of bone regeneration.

关键词： Magnesium alloy Biodegradation Biocompatibility Bone regeneration Bone defect repair

Generating animatable 3D cartoon faces from single portraits

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虚拟现实与智能硬件（中英文） 2024年第4期6卷 292-307页

作者： Chuanyu PAN Guowei YANG Taijiang MU yu-kun LAI Department of Electrical Engineering and Computer Sciences University of California BerkeleyBerkeley CA 94704USA Department of Computer Science and Technology Tsinghua UniversityBeijing 100084China School of Computer Science and Informatics Cardiff UniversityCardiff CF244AGUK

Background With the development of virtual reality(VR)technology,there is a growing need for customized 3D ***,traditional methods for 3D avatar modeling are either time-consuming or fail to retain the similarity to the person being *** study presents a novel framework for generating animatable 3D cartoon faces from a single portrait *** First,we transferred an input real-world portrait to a stylized cartoon image using *** then proposed a two-stage reconstruction method to recover a 3D cartoon face with detailed *** two-stage strategy initially performs coarse estimation based on template models and subsequently refines the model by nonrigid deformation under landmark ***,we proposed a semantic-preserving face-rigging method based on manually created templates and deformation *** Compared with prior arts,the qualitative and quantitative results show that our method achieves better accuracy,aesthetics,and similarity ***,we demonstrated the capability of the proposed 3D model for real-time facial animation.

关键词： 3D reconstruction Cartoon face reconstruction Face rigging Stylized reconstruction Virtual reality

Cocycle Hopf algebra structures on free modified Rota-Baxter algebras by vertex-decorated rooted trees

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Acta Mathematica Sinica,English Series 2024年

作者： Shang Hua ZHENG yu kun LIU School of Mathematics and Statistics Jiangxi Normal University

A modified Rota-Baxter operator originates from the convolution theorem for the Hilbert transformation by Tricomi. It also satisfies the modified classical Yang-Baxter equation discovered by Semenov-Tian-Shansky, and is applied to Lax equations and affine geometry of Lie groups later. In this paper, we provide an alternative explicit construction of free modified Rota-Baxter associative algebras from the perspective of combinatorial objects. First, we revisit a construction of free operated bialgebra structure on vertex-decorated rooted forests via a variant of the Hochschild 1-cocycle *** an isomorphism between two kinds of free operated algebras given by different carriers, we construct free modified Rota-Baxter algebras on vertex-decorated rooted forests. We then obtain a combinatorial coproduct on the free modified Rota-Baxter algebra by means of the universal property of free operated algebras, leading to a cocycle bialgebra structure and further a cocycle Hopf algebra structure on it.

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Bioinspired Hemostatic Strategy via Pulse Ejections for Severe Bleeding Wounds

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Research 2024年第1期2023卷 281-299页

作者： Bitao Lu Enling Hu Weiwei Ding Wenyi Wang Ruiqi Xie kun yu Fei Lu Guangqian Lan Fangyin Dai State Key Laboratory of Silkworm Genome Biology College of SericultureTextile and Biomass SciencesSouthwest UniversityChongqing 400715China Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile Chongqing 400715China Division of Trauma and Surgical Intensive Care Unit Research Institute of General SurgeryJinling HospitalMedical School of Nanjing UniversityNanjing210002 Jiangsu ProvinceChina Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHong KongChina

Efficient hemostasis during emergency trauma with massive bleeding remains a critical challenge in prehospital ***,multiple hemostatic strategies are critical for treating large bleeding *** this study,inspired by bombardier beetles to eject toxic spray for defense,a shape-memory aerogel with an aligned microchannel structure was proposed,employing thrombin-carrying microparticles loaded as a built-in engine to generate pulse ejections for enhanced drug *** aerogels,after contact with blood,can rapidly expand inside the wound,offering robust physical barrier blocking,sealing the bleeding wound,and generating a spontaneous local chemical reaction causing an explosivelike generation of CO_(2) microbubbles,which provide propulsion thrust to accelerate burst ejection from arrays of microchannels for deeper and faster drug *** ejection behavior,drug release kinetics,and permeation capacity were evaluated using a theoretical model and experimentally *** novel aerogel showed remarkable hemostatic performance in severely bleeding wounds in a swine model and demonstrated good degradability and biocompatibility,displaying great potential for clinical application in humans.

关键词： wound sealing offering

Subclinical paraganglioma of the retroperitoneum:A case report

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World Journal of Clinical Cases 2024年第15期12卷 2672-2677页

作者： Li-Min Kang Fa-kun yu Fu-Wei Zhang Lei Xu Department of Hepatobiliary and Pancreatic Surgery Puer People's HospitalPuer 665000Yunnan ProvinceChina

BACKGROUND Paraganglioma(PGL)located in the retroperitoneum presents challenges in diagnosis and treatment due to its hidden location,lack of specific symptoms in the early stages,and absence of distinctive manifestations on *** SUMMARY A 56-year-old woman presented with a left upper abdominal mass discovered 1 wk ago during a physical *** did not have a history of smoking,alcohol consumption,or other harmful habits,no surgical procedures or infectious diseases,and had a 4-year history of *** admission,she did not exhibit fever,vomiting,or abdominal *** examination indicated mild percussion pain in the left upper abdomen,with no palpable enlargement of the liver or *** tests and tumor markers showed no significant *** computed tomography and magnetic resonance imaging of the upper abdomen revealed a cystic solid mass in the left epigastrium measuring approximately 6.5 cm×4.5 cm,with inhomogeneous enhancement in the arterial phase,closely associated with the lesser curvature of the stomach and the *** patient underwent laparoscopic resection of the retroperitoneal mass,which was successfully removed without tumor rupture.A 12-month postoperative follow-up period showed good *** This case report details the successful laparoscopic resection of a retroperitoneal subclinical PGL,resulting in a good recovery observed at the 12-month ***,the patient also experienced unexpected cure of hypertensive disease.

关键词： Paraganglioma Retroperitoneal anatomy Subclinical Pheochromocytoma Laparoscopy Case report

Erythropoietin-induced hepatocyte receptor A2 regulates effect of pyroptosis on gastrointestinal colorectal cancer occurrence and metastasis resistance

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World Journal of Gastrointestinal Oncology 2024年第9期16卷 3781-3797页

作者： yu-kun Zhang Ran Shi Ruo-yu Meng Shui-Li Lin Mei Zheng Department of Rehabilitation Medicine The First Affiliated Hospital of Shandong First Medical University&Shandong Provincial Qianfoshan HospitalJinan 250014Shandong ProvinceChina Department of Minimally Invasive Comprehensive Treatment of Cancer Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250021Shandong ProvinceChina Department of Ana and Intestinal Surgery The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina

Erythropoietin-induced hepatocyte receptor A2(EphA2)is a receptor tyrosine kinase that plays a key role in the development and progression of a variety of *** article reviews the expression of EphA2 in gastrointestinal(GI)colorectal cancer(CRC)and its regulation of *** is a form of programmed cell death that plays an important role in tumor *** have shown that EphA2 regulates pyrodeath through various signaling pathways,affecting the occurrence,development and metastasis of GI *** overexpression of EphA2 is closely related to the aggressiveness and metastasis of GI CRC,and the inhibition of EphA2 can induce pyrodeath and improve the sensitivity of cancer cells to *** addition,EphA2 regulates intercellular communication and the microenvironment through interactions with other cytokines and receptors,further influencing cancer *** role of EphA2 in GI CRC and its underlying mechanisms provide us with new perspectives and potential therapeutic targets,which have important implications for future cancer treatment.

关键词： Colorectal cancer Pyroptosis Erythropoietin-induced hepatocyte receptor A2 Tumor metastasis Drug resistance

Efficiency and safety of laparoscopic left hemihepatectomy: A study of intrathecal vs extrathecal Glissonean pedicle techniques

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World Journal of Gastrointestinal Surgery 2024年第8期16卷 2612-2619页

作者： Li-Min Kang Lei Xu Fu-Wei Zhang Fa-kun yu Li Lang Department of Hepatobiliary and Pancreatic Surgery Puer People's HospitalPuer 665000Yunnan ProvinceChina Department of Outpatient Puer People's HospitalPuer 665000Yunnan ProvinceChina

BACKGROUND Selective hemihepatic vascular occlusion is utilized in both right and left hemihepatectomies to preserve blood supply to the intact lobe,maintain hemo-dynamic stability,and mitigate surgical *** this technique encompasses both intrathecal and extrathecal Glissonean pedicle transection methods,there is a lack of systematic comparative reports on these two *** To retrospectively analyze the clinical data of patients with hepatocellular carcinoma(HCC)undergoing laparoscopic anatomical hepatectomy in our hospital to explore the feasibility,safety,and short-and long-term efficacy of extrathecal and intrathecal Glissonean pedicle transection methods in laparo-scopic left *** A retrospective study was performed to analyze the clinical data of 49 HCC patients who underwent laparoscopic left hemihepatectomy from January 2019 to December 2022 in our *** patients were divided into extrathecal Glissonean pedicle transection(EGP)group(n=24)and intrathecal Glissonean pedicle transection(IGP)group(n=25)according to the different approaches used for selective hemihepatic vascular *** perioperative indicators,liver function indexes,complications,and follow-up findings were compared between these two *** The surgeries were smooth in both groups,and no perioperative death was *** hepatic pedicle transection time and the operation time were(16.1±2.3)minutes and(129.6±19.0)minutes,respectively,in the EGP group,which were significantly shorter than those in the IGP group[(25.5±2.4)minutes and(184.8±26.0)minutes,respectively],both P0.05).The incidence of postoperative complications showed no significant difference[16.67%(4/24)vs 16.0%(4/25),P>0.05].All the 49 HCC patients were followed up after surgery(range:11.2

关键词： Hepatocellular carcinoma Laparoscopy Extra-Glissonian approach Intra-Glissonian approach Surgical efficiency Surgical safety

Acrodermatitis Continua of Hallopeau With Excellent Response to Topical Calcipotriol/Betamethasone Ointment:A Report of Two Cases

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International Journal of Dermatology and Venereology 2024年第2期7卷 119-120页

作者： yu-kun Zhao Hui-Hui Wu Juan-Hua Liu Di-Qing Luo Department of Dermatology The East Division of The First Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdong 510700China

Introduction:Acrodermatitis continua of Hallopeau(ACH)is an uncommon chronic cutaneous *** to date,its treatment is still difficult and frustrating although various topical and systemic agents alone or in different combinations have been tried with variable ***,we report two cases of ACH successfully treated with calcipotriol/betamethasone *** presentation:Two cases of ACH were characterized by thumb involvement alone and showed an excellent response to calcipotriol/betamethasone ointment(1 g:calcipotriol 50µg and betamethasone 0.5 mg).Discussion:Treatment of ACH is challenging for *** systemic therapies and topical drugs have been applied,however,no universally effective treatment regimen has yet been established for long-lasting *** of calcipotriol and betamethasone is more effective in treating psoriasis than the individual components alone,and the current 2 cases with ACH were reported to be treated successfully by the calcipotriol/betamethasone ***:Topical calcipotriol/betamethasone compound is an optional agent for the treatment of ACH with a novel effect.

关键词： pustular eruptions calcipotriol/betamethasone ointment treatment