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Assessing Dual Approaches for Ranking Score Computation via Transitive Triads
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作者 Bowen Liu 《Journal of Applied Mathematics and Physics》 2024年第11期4020-4029,共10页
The possibility of developing a complete graph invariant computable in polynomial time remains an open question. Consequently, creating efficient algorithms to verify non-isomorphism, including heuristic approaches, i... The possibility of developing a complete graph invariant computable in polynomial time remains an open question. Consequently, creating efficient algorithms to verify non-isomorphism, including heuristic approaches, is essential. Effective implementation of these heuristics necessitates both the adaptation of existing graph invariants and the invention of novel ones, which continues to be a relevant challenge. Numerous current invariants are capable of distinguishing a significant number of graphs rapidly in real-time scenarios. In this study, we present an invariant tailored for tournaments, a specific class of directed graphs. Tournaments are particularly intriguing because the count of distinct tournaments for a given number of vertices aligns with that of undirected graphs of the same size. The introduced invariant evaluates all possible tournament subsets derived from the original digraph that share the identical arc set. For each subset tournament, standard rankings are computed and aggregated to produce the final vertex scores, which serve as the new invariant. Our analysis indicates that this newly proposed invariant diverges from the most straightforward tournament invariant, which typically assigns scores to each participant. Preliminary computational tests demonstrate that the minimal correlation between the sequences generated by these two invariants occurs at a vertex count of 15. 展开更多
关键词 Graph Invariant Directed Graphs Tournament Theory Transitive triads
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Relationship between Dark Personality Traits and TikTok Addiction among Chinese College Students:The Mediating Role of Social Ostracism
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作者 Shijie Li Yongliang Wang 《International Journal of Mental Health Promotion》 2025年第9期1335-1351,共17页
Background:Recent years have witnessed the rapid rise of TikTok,a short-video social platform,which has sparked concerns about its potential for misuse and addiction.TikTok addiction has been associated with various p... Background:Recent years have witnessed the rapid rise of TikTok,a short-video social platform,which has sparked concerns about its potential for misuse and addiction.TikTok addiction has been associated with various psychological and social issues.This study aims to explore the mediating role of social ostracism in the relationship between the Dark Triad(Machiavellianism,Psychopathy,and Narcissism)and TikTok addiction.Methods:Data were collected from 425 Chinese college students through convenience sampling,using three validated scales:the Dirty Dozen,the Social Ostracism Scale,and the Bergen Social Media Addiction Scale.Structural Equation Modeling(SEM)with AMOS 24 revealed significant patterns.Results:Narcissism had direct positive effects on both social ostracism(β0.115,p 0.01)and TikTok addiction(β0.223,p 0.05),while Psychopathy only had a direct positive effect=<=<on social ostracism(β0.147,p 0.05).Contrary to expectations,Machiavellianism did not show significant direct=<effects on either social ostracism(βp 0.05)or TikTok addiction(β0.135,p 0.05).Mediation analysis=-0.031,>=>confirmed that social ostracism acted as a positive mediator,amplifying the effects of Psychopathy(β0.049,p 0.05)=<and Narcissism(β0.052,p 0.01)on TikTok addiction.In other words,higher levels of Psychopathy and Narcissism=<were linked to greater experiences of social ostracism,which in turn were linked to higher levels of TikTok addiction.Conclusion:These findings suggest an important role for social ostracism in linking Narcissism and Psychopathy to TikTok addiction.Addressing social ostracism and these dark personality traits through targeted interventions may be important in reducing TikTok addiction risks among individuals with such traits. 展开更多
关键词 Chinese college students TikTok addiction the Dark Triad social ostracism
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Prenatal ultrasonic characteristics and diagnosis of fetal Currarino syndrome:Report of 2 cases and review of literature
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作者 WEI Yingni ZHANG Yuchen +3 位作者 DENG Zongfeng WANG Yingqiu HUANG Qiaojie CHEN Yayan 《中国医学影像技术》 CSCD 北大核心 2024年第8期1212-1215,共4页
Objective To explore prenatal ultrasonic characteristics of fetal Currarino syndrome(CS)and methods for prenatal diagnosis of CS.Methods Two fetuses with CS confirmed by genetic examination were retrospectively analyz... Objective To explore prenatal ultrasonic characteristics of fetal Currarino syndrome(CS)and methods for prenatal diagnosis of CS.Methods Two fetuses with CS confirmed by genetic examination were retrospectively analyzed,while 6 CS fetuses with complete prenatal ultrasonic data in literature were reviewed.Prenatal ultrasonic characteristics of CS fetuses and the method for prenatal diagnosis of CS were discussed.Results Among 8 CS fetuses diagnosed with prenatal ultrasound,4 were female singletons with a clear family history of CS,and MNX 1 gene mutation was found in 1 fetus.The other 4 fetuses were 2 pairs of male monochorionic twins,all with MNX 1 gene mutation.Among 8 CS fetuses,complete triad(sacral agenesis abnormalities,anorectal malformation and presacral mass)were displayed only in 2 fetuses,while all 8 had sacral agenesis abnormalities and 6(6/8,75.00%)were detected with prenatal ultrasound,6 had low location of conus medullaris and 2(2/6,33.33%)detected with prenatal ultrasound.Conclusion Prenatal ultrasound was the first choice for non-invasive diagnosis of fetal CS.When one of sacral agenesis abnormalities,anorectal malformation and presacral mass was found with prenatal ultrasound,the possibility of CS should be considered,and fetal MRI,genetic examination and prenatal genetic counselling should be recommended if necessary. 展开更多
关键词 Currarino triad ultrasonography prenatal AMNIOCENTESIS GENES
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Spatiotemporal pattern formation in parametrically driven two-dimensional Bose–Einstein condensates
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作者 Jun Wan Wen Wen Hui-jun Li 《Communications in Theoretical Physics》 CSCD 2024年第12期148-154,共7页
We investigate spatiotemporal periodic patterns in harmonically trapped Bose–Einstein condensates(BECs)driven by a periodic modulation of the interaction.Resonant with the breathing mode,we show the emergence of a sq... We investigate spatiotemporal periodic patterns in harmonically trapped Bose–Einstein condensates(BECs)driven by a periodic modulation of the interaction.Resonant with the breathing mode,we show the emergence of a square lattice pattern containing two orthonormal stripes.We study the time evolutions of the lattice patterns for different driving strengths and dissipations.We find that its spatial periodicity and temporal oscillating frequency match the Bogoliubov dispersion,which is the intrinsic property of the system and relevant to the parametric amplification of elementary excitations.In the circumstances of strong driving strength and low dissipation,we further observe the triad interaction and the resulting superlattice state,which are well explained by the nonlinear amplitude equation for superimposed stripes.These results shed light on unexplored nonlinear spatiotemporal dynamics of two-dimensional patterns in harmonically trapped BECs that can pave the way for engineering exotic patterns by state-of-the-art experiments. 展开更多
关键词 square lattice pattern spatio-temporal periodicity triad interaction
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Liver Abscess: Diagnostic, Therapeutic and Progressive Aspects in the Hepato-Gastroenterology Department of Sourô Sanou University Hospital
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作者 Koura Mâli Napon-Zongo Passolguewendé Delphine +5 位作者 Ouattara Zanga Damien Somé Nab Zouré Nogogna Kamboule Bébar Euloges Zampou Inoussa Sawadogo Appolinaire 《Open Journal of Gastroenterology》 2024年第12期467-480,共14页
Introduction: Liver abscess is an infection of the hepatic parenchyma that requires early diagnosis and effective management. The objective of this study was to describe the diagnostic, therapeutic and progressive asp... Introduction: Liver abscess is an infection of the hepatic parenchyma that requires early diagnosis and effective management. The objective of this study was to describe the diagnostic, therapeutic and progressive aspects of liver abscesses at the Sourô Sanou University Hospital (CHUSS). Methodology: This was a descriptive cross-sectional study, with retrospective data collection, conducted from January 1, 2018 to December 31, 2021 in the hepato-gastroenterology department of the CHUSS. Patients who had a liver abscess confirmed by liver ultrasound and were hospitalized during the study period were included. Primary abscessed cancers and hydatid or superinfected cysts were not included. Results: During the study period, 1767 patients were hospitalized and 23 cases of abscess included. There were 17 men, a sex ratio of 2.8. The mean age was 37.3 ± 16.2 years. The predominant medical histories and pathological conditions were intestinal amoebiasis and chronic alcohol consumption, respectively in 13 (56.5%) and 11 (47.8%) patients. A Fontan triad was observed in 21 patients (91.3%) and a deterioration in general condition in more than 50% of patients. A hyperleukocytosis was observed in all patients, and an elevated C-reactive protein was found in 18 patients (78.3%). On ultrasound, a single abscess or more than two pockets were revealed in 9 and 6 patients respectively, located in the majority of cases (21 patients) in the right lobe. Imidazoles, alone or in combination with a cephalosporin, were administered. Ultrasound-guided or surgical drainage was performed in 12 (52.2%) and 02 patients respectively. The outcome was favorable in 19 patients (82.6%) and the outcome was fatal in 4 others. Conclusion: Liver abscess remains a potentially serious pathology in our context. Only early diagnosis with appropriate treatment can achieve excellent results. 展开更多
关键词 Liver Abscess Fontan Triad Hepatic Ultrasound THERAPEUTIC Progressive Burkina Faso
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Aspirin-Exacerbated Respiratory Disease: The Dentist’s Role in Recognition, Referral, and Management
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作者 Shawn Griffin Madison Watt +1 位作者 Emily Li James J. Closmann 《Open Journal of Stomatology》 2024年第12期441-448,共8页
Aspirin-exacerbated respiratory disease (AERD), also known as Samter’s triad, is characterized by aspirin intolerance, nasal polyps with recurrent rhinitis, and asthma. The components of AERD are frequently encounter... Aspirin-exacerbated respiratory disease (AERD), also known as Samter’s triad, is characterized by aspirin intolerance, nasal polyps with recurrent rhinitis, and asthma. The components of AERD are frequently encountered in dental offices. This article reviews the screening and appropriate referral of patients who may have AERD. The implications of AERD on a patient’s daily life, as well as a brief overview of potential treatments, are followed by a case report of a 36-year-old female patient. In the case report, a 36-year-old female patient with a history of chronic sinusitis, asthma, and aspirin allergy presents to a dental office with no evidence of oral disease. The case then describes the referral process to Otorhinolaryngology (ENT) for further evaluation, the diagnosis of Samter’s triad, and subsequent treatment through endoscopic sinus (ESS) surgery to remove nasal polyps. The patient experienced relief of symptoms at the one-year postoperative follow-up. As dental providers often serve as a frequent point of contact for many patients—some of whom may see their dentists more regularly than their primary care providers—we are uniquely positioned to recognize signs and symptoms in the head and neck region that may indicate systemic disease. 展开更多
关键词 DENTISTRY ASTHMA ASPIRIN Samter’s Triad
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Rare Case of Large Anterior Meningocele Associated with Uterine Didelphys
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作者 Joseph Maalouly Matt Wilson +2 位作者 Sanjay Adusumilli Vijidha Rajkumar Shanu Gambhir 《Open Journal of Modern Neurosurgery》 2024年第2期104-107,共4页
We report a 27-year-old female who presented with abdominal distension, saddle anesthesia, and lower back pain. CT and MRI of the abdomen/spine were performed which showed a large anterior sacral meningocele occupying... We report a 27-year-old female who presented with abdominal distension, saddle anesthesia, and lower back pain. CT and MRI of the abdomen/spine were performed which showed a large anterior sacral meningocele occupying most of the pelvic and abdominal cavity and displacement of their respective contents. Anterior approach was chosen, uterine didelphys was identified and mobilized, meningocele identified and gentle drainage with subsequent resection of the cyst wall and watertight closure was achieved. Subsequent MRI demonstrated resolution of most the sacral meningocele. Patient symptoms improved and are doing well. 展开更多
关键词 Sacral Agenesis Curarino Triad Large Meningocele
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EGFR Mutation and FHIT Methylation: Inverse Relationship in Patients with Lung Adenocarcinoma and Tuberculosis
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作者 Mireguli Abudureheman Xiuyou Yan Baidurula Ainitu 《Proceedings of Anticancer Research》 2024年第2期65-72,共8页
Objective:To investigate the genetic correlations between epithelial growth factor receptor(EGFR)mutation and FHIT methylation in patients diagnosed with lung adenocarcinoma(AC)and pulmonary tuberculosis(TB).Methods:T... Objective:To investigate the genetic correlations between epithelial growth factor receptor(EGFR)mutation and FHIT methylation in patients diagnosed with lung adenocarcinoma(AC)and pulmonary tuberculosis(TB).Methods:The presence of EGFR mutations and the methylation status of the FHIT gene in patients presenting with AC and TB were analyzed.The correlation between TB status and the observed genetic and epigenetic variations was also examined.Results:Among the 90 patients included in the study,38 exhibited EGFR mutations(14 among those with TB and 24 among those without TB),while 29 exhibited FHIT myelination(19 among those with TB and 10 among those without TB).Furthermore,the protein expression levels of EGFR and FHIT were significantly higher in patients diagnosed solely with AC compared to those presenting with both AC and TB.A robust inverse correlation was identified between TB status and the frequency of EGFR mutation(P<0.001).Moreover,significant associations were observed between TB status and FHIT methylation(P<0.01).Conclusion:The findings suggest a correlation between TB and the prevalence of EGFR mutation and FHIT methylation in the pathogenesis of AC. 展开更多
关键词 Lung cancer Adenocarcinoma(AC) Tuberculosis(TB) Epithelial growth factor receptor(EGFR) Fragile histidine triad(FHIT)
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双基线姿态确定三种算法的比较分析 被引量:6
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作者 刘晓辉 党亚民 +1 位作者 王潜心 杨磊 《大地测量与地球动力学》 CSCD 北大核心 2013年第1期123-127,共5页
利用仿真数据,通过对三种算法在不同情况下解算姿态角精度、代价函数和计算耗时的分析发现,优化TRIAD算法和QUEST算法解算结果完全相同,代价函数随着两基线精度比的降低而减小,姿态角精度与代价函数变化规律不一致,TRIAD算法耗时最少。
关键词 TRIAD 优化TRIAD QUEST 定姿 代价函数
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Triad,污染场地管理的新模式 被引量:7
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作者 丁远昭 沈欣 +1 位作者 曾辉 李喜青 《环境科学》 EI CAS CSCD 北大核心 2011年第3期803-808,共6页
污染场地的调查和修复往往是个耗时很长、成本很高的过程.传统的多阶段的场地管理模式是造成这一状况的重要原因之一.随着场地管理经验的增加和新技术的出现,美国形成了一种能大大缩短项目周期、显著降低成本的场地管理新模式:Triad模式... 污染场地的调查和修复往往是个耗时很长、成本很高的过程.传统的多阶段的场地管理模式是造成这一状况的重要原因之一.随着场地管理经验的增加和新技术的出现,美国形成了一种能大大缩短项目周期、显著降低成本的场地管理新模式:Triad模式.本文系统阐述了Triad模式的3个要素,即系统的项目计划,动态的工作策略和实时的测量技术,结合有关案例说明了Triad模式的优点和适用性,最后针对我国目前场地调查和修复的现状,提出相应的对策和建议. 展开更多
关键词 Triad模式 污染场地 管理 不确定性
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基于恒星敏感器的姿态确定算法研究 被引量:9
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作者 陈希军 张泽 史话 《控制工程》 CSCD 2008年第3期253-256,298,共5页
星敏感器是一种精度极高的姿态敏感器。基于恒星敏感器的姿态确定问题,从理论上推导了利用TRIAD算法,QUEST算法和Euler-q算法求解姿态矩阵的公式;以Wahba损失函数为指标,利用确定已知的方向余弦阵、恒星观测矢量及在噪声干扰下的星敏感... 星敏感器是一种精度极高的姿态敏感器。基于恒星敏感器的姿态确定问题,从理论上推导了利用TRIAD算法,QUEST算法和Euler-q算法求解姿态矩阵的公式;以Wahba损失函数为指标,利用确定已知的方向余弦阵、恒星观测矢量及在噪声干扰下的星敏感器的观测矢量,对比研究了各种算法的优缺点。利用一个标准星表,通过仿真计算验证了上述三种算法的正确性和有效性。 展开更多
关键词 TRIAD QUEST 姿态确定
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一种改进的TRIAD飞行器姿态确定方法 被引量:6
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作者 陈浩 谭久彬 《系统仿真学报》 EI CAS CSCD 北大核心 2008年第8期2101-2104,共4页
为了提高飞行器姿态测量精度和简化姿态确定的复杂性,提出了一种基于加权矢量和的TRIAD飞行器姿态确定算法。该算法基于TRIAD姿态确定原理,通过对观测矢量加权求和的方式以获得一个较传感器观测矢量更精确的矢量,并以此矢量作为TRIAD算... 为了提高飞行器姿态测量精度和简化姿态确定的复杂性,提出了一种基于加权矢量和的TRIAD飞行器姿态确定算法。该算法基于TRIAD姿态确定原理,通过对观测矢量加权求和的方式以获得一个较传感器观测矢量更精确的矢量,并以此矢量作为TRIAD算法的基准矢量,然后运用TRIAD算法进行姿态计算。仿真结果表明,这种算法获得的飞行器姿态精度优于传统的TRIAD算法,与优化的TRIAD算法精度近似,但简化了姿态确定的过程,提高了姿态确定的速度。 展开更多
关键词 飞行器 姿态确定 矢量观测 TRIAD算法
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基于弹载双视场星敏感器求解姿态的几种算法研究 被引量:2
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作者 肖松 刘朝山 马涛 《光学技术》 CAS CSCD 北大核心 2008年第S1期218-220,共3页
利用弹载星敏感器观测得到的数据,采用三种不同的姿态求解算法,分别计算出了弹体的姿态。通过比较损失函数和处理时间,得出QUEST算法精度高,处理时间短,适用于求解双视场星敏感器的导弹姿态。
关键词 星敏感器 姿态算法 TRIAD QUEST 最小二乘法
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基于最优四元数估计的摇摆基座粗对准技术
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作者 徐景硕 王勇军 唐波 《压电与声光》 CAS CSCD 北大核心 2016年第5期756-759,765,共5页
针对摇摆基座的粗对准问题,提出了一种精度更优的粗对准方法。根据三维坐标矢量与旋转四元数间的内在关系,基于Wahba问题的求解原理,将双观测矢量的最优姿态阵求取问题归结为一个典型三角函数最大值的求解问题。阐述了Wahba问题的求解原... 针对摇摆基座的粗对准问题,提出了一种精度更优的粗对准方法。根据三维坐标矢量与旋转四元数间的内在关系,基于Wahba问题的求解原理,将双观测矢量的最优姿态阵求取问题归结为一个典型三角函数最大值的求解问题。阐述了Wahba问题的求解原理,分析了Wahba问题与最优四元数估计法的关系,剖析了最优四元数估计算法的复共线性,设计了基于最优四元数估计的摇摆基座粗对准方案,并与传统TRIAD算法和最优TRIAD算法进行了应用比较。蒙特卡洛500个样本的仿真结果表明,采用基于最优四元数估计的粗对准法的方位姿态估计精度远优于TRIAD算法和最优TRIAD算法,能使方位失准角的变化幅值控制在角分级,在此基础上能更好实现摇摆基座下惯导系统精对准。 展开更多
关键词 最优四元数估计 TRIAD算法 捷联惯导系统 粗对准 摇摆基座
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Chiari三联征(Chiari's triad) 被引量:2
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作者 田子强 《食管外科电子杂志》 2013年第4期185-,共1页
指各种原因所致的主动脉食管瘘发病时的一组特异性临床表现,首先是胸痛(一般为胸中部疼痛),随即出现前兆性动脉出血,一段时间间隔后出现致命性大出血,这一时间间隔可以是数小时至数天不等。Dubrueil于1818年第一次描述了主动脉食... 指各种原因所致的主动脉食管瘘发病时的一组特异性临床表现,首先是胸痛(一般为胸中部疼痛),随即出现前兆性动脉出血,一段时间间隔后出现致命性大出血,这一时间间隔可以是数小时至数天不等。Dubrueil于1818年第一次描述了主动脉食管瘘这一病症[1]。Chiari于1914年首先描述了主动脉食管瘘三联征并因之得名[2],当时Chiari的描述是胸中部疼痛或吞咽困难,前兆性出血和致命性出血。Carter等于1978年对24例主动脉食管瘘的尸检研究发现[3]:80%的患者在致命性大出血前有前兆性出血。有关Chiari三联征的发生机制, Amin等认为[4],胸痛可能是由于主动脉壁的扩张、腐蚀或局部切割,纵隔炎,食管穿孔,或肿瘤侵犯主动脉、胸膜等所致。前兆出血暂时停止可能是由于动脉壁痉挛,血管内压力下降或主动脉周围血肿等因素而致瘘口暂时闭塞。随后闭塞的瘘口被感染或胃肠道消化液再次腐蚀掉,出现致命性大出血。Chiari三联征可发生于任何原因所致的主动脉食管瘘患者,包括主动脉夹层动脉瘤,食管及气管的恶性肿瘤,手术后并发症,食管异物等。Chiari三联征的提出对我们进一步认识主动脉食管瘘这一高度致命性疾病的发病机制及发病规律具有重大的理论意义和临床价值。在前兆性出血后的数小时至数天的时间内,外科医生有了较充足的诊断及处理时间,使得主动脉食管瘘的手术治愈成为可能[5]。 展开更多
关键词 三联征 Chiari’s triad 前兆 患者 疼痛 主动脉食管瘘 CHIARI
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能量平台中结扎束在阴式子宫全切手术中的应用 被引量:1
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作者 索静 《内蒙古医学杂志》 2014年第7期790-792,共3页
目的探讨Force Triad能量平台中血管结扎闭合系统(结扎束)在阴式子宫全切术(Transvaginal total hysterectomy,TVH)中的应用价值。方法 2013年4~12月住院患者60例,随机分成观察组(ligasuren血管闭合系统组)与对照组(传统手术组)... 目的探讨Force Triad能量平台中血管结扎闭合系统(结扎束)在阴式子宫全切术(Transvaginal total hysterectomy,TVH)中的应用价值。方法 2013年4~12月住院患者60例,随机分成观察组(ligasuren血管闭合系统组)与对照组(传统手术组),比较两组间在手术时间、术中出血量、术后排气时间、术后发热时间、术后离床活动时间以及平均住院天数等情况。结果观察组手术时间、术中出血量、术后离床活动时间及平均住院时间明显少于开腹手术组(P〈0.05),差异有统计学意义;术后排气时间、术后发热时间差异均无显著性(P〉0.05)。结论 Ligasuren血管闭合系统在阴式子宫全切手术的应用方面有一定的优势,可以更有效地闭合血管,减少出血量及缩短手术时间,减少术后并发症等优点,值得推广。 展开更多
关键词 FORCE Triad能量平台 结扎束血管闭合系统 阴式子宫全切术
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Occurrence of Fibonacci numbers in development and structure of animal forms: Phylogenetic observations and epigenetic significance
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作者 John J. Wille 《Natural Science》 2012年第4期216-232,共17页
A survey of zoological literature affirmed the wide occurrence of Fibonacci numbers in the organization of acellular and prokaryotic life forms as well as in some eukaryotic protistans and in the embryonic development... A survey of zoological literature affirmed the wide occurrence of Fibonacci numbers in the organization of acellular and prokaryotic life forms as well as in some eukaryotic protistans and in the embryonic development and adult forms of many living and fossil remains of metazoan animals. A detailed comparative analysis of the axial skeleton of a fossil fish and humans revealed a new rule of the “nested triad” of bones organized along the proximal to distal axis of limb appendages. This growth pattern and its ubiquity among living vertebrates appear to underlie a profound rule of pattern formation that is dictated in part by the genetics and epigenetic mechanisms of stem cell clonal development. 展开更多
关键词 ANIMAL Body Plan FIBONACCI Numbers (n) HOX Genes Nested triads Phylogeny Recursive Transition Networks Segmentation
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融合TRIAD算法用于GPS姿态确定 被引量:11
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作者 黎湧 吴宏鑫 刘良栋 《中国空间科学技术》 CSCD 北大核心 2000年第2期30-37,共8页
研究把观测矢量定姿算法用于 GPS姿态确定。传统的 TRIAD算法利用两个非平行矢量确定载体的三轴姿态 ,但它存在对主矢量敏感 ,且不能利用第3根矢量的测量信息等缺点。文章提出一种改进的 TRIAD算法 ,克服了主矢量敏感问题 ;为了能利用 ... 研究把观测矢量定姿算法用于 GPS姿态确定。传统的 TRIAD算法利用两个非平行矢量确定载体的三轴姿态 ,但它存在对主矢量敏感 ,且不能利用第3根矢量的测量信息等缺点。文章提出一种改进的 TRIAD算法 ,克服了主矢量敏感问题 ;为了能利用 3根基线的观测信息 ,在 OPTTRIAD算法的基础上提出融合TRIAD算法 ,它可以提高定姿精度。用接收机进行了实验 ,结果表明改进的TRIAD算法确实克服了主矢量敏感问题 ;较之传统的 TRIAD算法 ,融合 TRIAD算法的偏航角、俯仰角和滚动角精度分别提高了 35 % ,19%和 34 % 展开更多
关键词 全球定位系统 姿态确定 融合算法 TRIAD GPS卫星
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Lax Triad Approach to Symmetries of Scalar Modified Kadomtsev–Petviashvili Hierarchy
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作者 Xiao Deng Kui Chen Da-Jun Zhang 《Communications in Theoretical Physics》 SCIE CAS CSCD 2017年第2期131-136,共6页
By means of Lax triads we reconstruct isospectral and nonisospectral scalar modified Kadomtsev–Petviashvili(mKP) hierarchies. In this approach the argument y is treated as an independent variable which is independent... By means of Lax triads we reconstruct isospectral and nonisospectral scalar modified Kadomtsev–Petviashvili(mKP) hierarchies. In this approach the argument y is treated as an independent variable which is independent of time parameters {t_1, t_2,...}. Consequently, the isospectral and nonisospectral scalar mKP flows can have clear zero curvature representations, which enables us to handle investigation of symmetries of the scalar isospectral mKP hierarchy as freely as for(1+1)-dimensional systems. As a result, we obtain Lie algebraic structures of the scalar mKP flows and construct symmetries for the scalar isospectral mKP hierarchy. 展开更多
关键词 scalar modified Kadomtsev–Petviashvili hierarchies Lax triads symmetries Lie algebra
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The Worlds on the Other Side of the Big Bang
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作者 Avas Khugaev Eugeniya Bibaeva 《Journal of Applied Mathematics and Physics》 2023年第1期276-302,共27页
Taking the Big Bang as an established fact, the question inevitably arises about what exactly caused it, in what environment could it have happened and what happened before it. The developed approach allows us to shed... Taking the Big Bang as an established fact, the question inevitably arises about what exactly caused it, in what environment could it have happened and what happened before it. The developed approach allows us to shed light on many raised questions and to establish what universal laws and structures formed what happened before the Big Bang, to understand its cause and the dynamic processes that led to it. This required a radical revision of many views, giving them a new meaning and content. This approach has led to a consistent and conceptually new understanding of these phenomena, which allowed correctly formulate questions to which there are still no clear answers. Based on this formulation of the problem, we came to new ideas about the nature of Dark energy, Dark matter and the region of their birth, formulated and described the mechanism of the formation of worlds and their hierarchy on the other side of the Big Bang and the mechanism of this explosion itself. The Primary Parent Particle was introduced into the concept, which was the basis of everything and is the carrier of the fundamental Primary space introduced by us, which had at least two phase states. This particle consists of Beginnings united in the form of Borromeo rings. This made it possible to calculate the structure and primary spectrum of elementary particles that arose on the other side of the Big Bang, the mechanisms of their formation and the resulting fundamental interactions that lead to the existence of vortices before the Big Bang;the mechanisms of the birth of multiple universes and much more are also considered. The concept of the “cosmic genetic code" is introduced, the characteristics and mechanism of its formation before the Big Bang are presented. 展开更多
关键词 “Dirac Sea” Big Bang Primary space Primary Parent Particle “swaddled triads MATERIALITY WORLDS DNA of “seeds of Creation” Borromeo rings “clumps” of Dark energy
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