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https://www.readbyqxmd.com/read/28693002/event-triggered-communication-for-leader-following-consensus-of-second-order-multiagent-systems
#1
Min Zhao, Chen Peng, Wangli He, Yang Song
This paper is concerned with leader-following consensus of second-order multiagent systems with nonlinear dynamics. First, to save the limited communication resources, a new event-triggered control protocol is delicately developed without requiring continuous communication among the follower agents. Then, by employing the Lyapunov functional method and the Kronecker product technique, a novel sufficient criterion with less conservation is derived to guarantee the leader-following consensus while excluding the Zeno behavior...
July 4, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28678726/a-sampling-based-bayesian-approach-for-cooperative-multiagent-online-search-with-resource-constraints
#2
Hu Xiao, Rongxin Cui, Demin Xu
This paper presents a cooperative multiagent search algorithm to solve the problem of searching for a target on a 2-D plane under multiple constraints. A Bayesian framework is used to update the local probability density functions (PDFs) of the target when the agents obtain observation information. To obtain the global PDF used for decision making, a sampling-based logarithmic opinion pool algorithm is proposed to fuse the local PDFs, and a particle sampling approach is used to represent the continuous PDF...
June 27, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28678725/a-connection-between-dynamic-region-following-formation-control-and-distributed-average-tracking
#3
Fei Chen, Wei Ren
This paper studies the inherent connection between dynamic region-following formation control (DRFFC) and distributed average tracking (DAT). We propose a fixed-gain DAT algorithm with robustness to initialization errors for linear multiagent systems, which is capable of achieving DAT with a zero tracking error for a large class of reference signals. In the case that the fixed gain cannot be chosen properly, we present an adaptive control gain design, under which each agent simply chooses its own gain and the restriction on knowing the upper bounds on the reference signals and their inputs is removed...
June 27, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28678724/distributed-optimal-consensus-control-for-multiagent-systems-with-input-delay
#4
Huaipin Zhang, Dong Yue, Wei Zhao, Songlin Hu, Chunxia Dou
This paper addresses the problem of distributed optimal consensus control for a continuous-time heterogeneous linear multiagent system subject to time varying input delays. First, by discretization and model transformation, the continuous-time input-delayed system is converted into a discrete-time delay-free system. Two delicate performance index functions are defined for these two systems. It is shown that the performance index functions are equivalent and the optimal consensus control problem of the input-delayed system can be cast into that of the delay-free system...
June 27, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28654573/patterns-of-adjuvant-therapy-utilization-in-uterine-carcinosarcoma-stages-i-to-iii-a-national-cancer-database-analysis
#5
William A Stokes, Tyler P Robin, Matthew W Jackson, Arya Amini, Tracey E Schefter, Carolyn C Lefkowits, Christine M Fisher
OBJECTIVE: The objective of this study is to characterize patterns of utilization of adjuvant chemotherapy (CT) and radiotherapy (RT) in the posthysterectomy management of uterine carcinosarcoma (UCS) in the United States. MATERIALS AND METHODS: We queried the National Cancer Database for women diagnosed with UCS between 2004 and 2012 and undergoing hysterectomy. Logistic regression was performed to identify sociodemographic, facility-specific, and treatment-related predictors of receiving multiagent chemotherapy, external beam radiotherapy (EBRT), or brachytherapy (BT)...
June 26, 2017: American Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28645979/the-2015-middle-childhood-survey-mcs-of-mental-health-and-well-being-at-age-11-years-in-an-australian-population-cohort
#6
Kristin R Laurens, Stacy Tzoumakis, Kimberlie Dean, Sally A Brinkman, Miles Bore, Rhoshel K Lenroot, Maxwell Smith, Allyson Holbrook, Kim M Robinson, Robert Stevens, Felicity Harris, Vaughan J Carr, Melissa J Green
PURPOSE: The Middle Childhood Survey (MCS) was designed as a computerised self-report assessment of children's mental health and well-being at approximately 11 years of age, conducted with a population cohort of 87 026 children being studied longitudinally within the New South Wales (NSW) Child Development Study. PARTICIPANTS: School Principals provided written consent for teachers to administer the MCS in class to year 6 students at 829 NSW schools (35.0% of eligible schools)...
June 23, 2017: BMJ Open
https://www.readbyqxmd.com/read/28641272/aggregation-analysis-for-competitive-multiagent-systems-with-saddle-points-via-switching-strategies
#7
Liying Zhu, Zhengrong Xiang
This paper addresses the aggregation issues of competitive multiagent systems (CMASs) consisting of competitive agents with multimodes and saddle points. In such CMASs, due to existing mutual competitions, every agent is equipped with finite multimodes, and every mode in any agent is described as a second-order linear time-invariant (LTI) control system. When the origin is the same saddle point of all modes of agents, to investigate aggregation of the CMASs with switching strategies, we first use switched LTI systems with saddle points to formulate such CMASs...
June 16, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28641095/high-dose-chemotherapy-and-autologous-stem-cell-transplantation-in-relapsed-or-refractory-hodgkin-lymphoma-emerging-questions-newer-agents-and-changing-paradigm
#8
REVIEW
Saad Akhtar
Primary treatment for adult and pediatric patients with Hodgkin lymphoma (HL) using current multiagent anthracycline-based chemotherapy with or without radiation therapy will cure approximately >70% of the patients; >95% for early stage with a favorable risk profile and 70-75% with advanced stage and high risk features. Managing refractory and relapsed disease, however, remains a challenge. High dose chemotherapy (HDC) and autologous stem cell transplantation (auto-SCT) can salvage 40-70% of patients with relapsed or refractory HL...
June 13, 2017: Hematology/oncology and Stem Cell Therapy
https://www.readbyqxmd.com/read/28625208/parenting-cognitions-%C3%A2-parenting-practices-%C3%A2-child-adjustment-the-standard-model
#9
Marc H Bornstein, Diane L Putnick, Joan T D Suwalsky
In a large-scale (N = 317) prospective 8-year longitudinal multiage, multidomain, multivariate, multisource study, we tested a conservative three-term model linking parenting cognitions in toddlerhood to parenting practices in preschool to classroom externalizing behavior in middle childhood, controlling for earlier parenting practices and child externalizing behavior. Mothers who were more knowledgeable, satisfied, and attributed successes in their parenting to themselves when their toddlers were 20 months of age engaged in increased supportive parenting during joint activity tasks 2 years later when their children were 4 years of age, and 6 years after that their 10-year-olds were rated by teachers as having fewer classroom externalizing behavior problems...
June 19, 2017: Development and Psychopathology
https://www.readbyqxmd.com/read/28621885/multiagent-induction-chemotherapy-followed-by-chemoradiation-is-associated-with-improved-survival-in-locally-advanced-pancreatic-cancer
#10
Anna Torgeson, Shane Lloyd, Dustin Boothe, Randa Tao, Jonathan Whisenant, Ignacio Garrido-Laguna, George M Cannon
BACKGROUND: The role of chemoradiotherapy (CRT) in locally advanced pancreatic cancer (LAPC) is uncertain after multiple randomized clinical trials have yielded mixed results. The authors used the National Cancer Database (NCDB) to determine whether CRT yields a survival benefit compared with chemotherapy alone (CT). METHODS: Patients with nonmetastatic LAPC diagnosed during 2004 through 2014 were identified in the NCDB. Patients who received CT were compared with those who received CRT using chi-square analysis...
June 16, 2017: Cancer
https://www.readbyqxmd.com/read/28615254/methodologic-approach-for-the-biomarkers-reflecting-inflammation-and-nutritional-determinants-of-anemia-brinda-project
#11
REVIEW
Sorrel Ml Namaste, Grant J Aaron, Ravi Varadhan, Janet M Peerson, Parminder S Suchdev
Background: The Biomarkers Reflecting Inflammation and Nutritional Determinants of Anemia (BRINDA) project is a multiagency and multicountry collaboration that was formed to improve micronutrient assessment and to better characterize anemia.Objectives: The aims of the project were to 1) identify factors associated with inflammation, 2) assess the relations between inflammation, malaria infection, and biomarkers of iron and vitamin A status and compare adjustment approaches, and 3) assess risk factors for anemia in preschool children (PSC) and women of reproductive age (WRA)...
July 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28600274/finite-horizon-h%C3%A2-consensus-for-multiagent-systems-with-redundant-channels-via-an-observer-type-event-triggered-scheme
#12
Wenying Xu, Zidong Wang, Daniel W C Ho
This paper is concerned with the finite-horizon H∞ consensus problem for a class of discrete time-varying multiagent systems with external disturbances and missing measurements. To improve the communication reliability, redundant channels are introduced and the corresponding protocol is constructed for the information transmission over redundant channels. An event-triggered scheme is adopted to determine whether the information of agents should be transmitted to their neighbors. Subsequently, an observer-type event-triggered control protocol is proposed based on the latest received neighbors' information...
June 6, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28586748/haematological-malignancies-following-temozolomide-treatment-for-paediatric-high-grade-glioma
#13
Michael Karremann, Nadja Krämer, Marion Hoffmann, Maria Wiese, Andreas Beilken, Selim Corbacioglu, Dagmar Dilloo, Pablo Hernáiz Driever, Wolfram Scheurlen, Andreas Kulozik, Gerrit H Gielen, André O von Bueren, Matthias Dürken, Christof M Kramm
BACKGROUND: Temozolomide (TMZ) is widely used in high-grade glioma (HGG). There is a major concern of treatment-induced secondary haematological malignancies (SHMs). Due to the poor overall survival of HGG patients, the true incidence is yet elusive. Thus, the aim of this study was to determine the risk of SHMs following TMZ in paediatric HGG. METHODS: We analysed 487 patients from the HIT-HGG database of the German-speaking Society of Pediatric Oncology and Hematology with follow up beyond 1 year...
August 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28577955/surgery-versus-chemotherapy-and-radiotherapy-for-early-and-locally-advanced-small-cell-lung-cancer-a-propensity-matched-analysis-of-survival
#14
E Wakeam, S A Acuna, N B Leighl, M E Giuliani, S R G Finlayson, T K Varghese, G E Darling
BACKGROUND: The role of surgery in small cell lung cancer (SCLC) is controversial. Survival outcomes for resection of stage I-IIIA SCLC compared to chemotherapy-based non-surgical treatment (NST) were examined using propensity matching. METHODS: 29,994 clinical stage I-IIIA SCLC patients, including 2,619 undergoing surgery, were identified in the National Cancer Database. Stage-specific propensity scores for receipt of surgery were created. Resected patients were matched 1:1 to those undergoing NST...
July 2017: Lung Cancer: Journal of the International Association for the Study of Lung Cancer
https://www.readbyqxmd.com/read/28577833/integration-of-stereotactic-body-radiation-therapy-into-the-multidisciplinary-management-of-pancreatic-cancer
#15
REVIEW
Lauren M Rosati, Rachit Kumar, Joseph M Herman
Although most patients with pancreatic cancer die of metastatic disease, an autopsy study showed that up to one-third of patients die of predominantly local disease. This patient population stands to benefit the most from radiation, surgery, or both. Unfortunately, however, single-agent chemotherapy has had minimal benefit in pancreatic cancer, and most patients progress distantly before receiving radiation therapy (RT). With the addition of multiagent chemotherapy, patients are living longer, and RT has emerged as an important modality in preventing local progression...
July 2017: Seminars in Radiation Oncology
https://www.readbyqxmd.com/read/28561672/pancreatic-adenocarcinoma-improving-prevention-and-survivorship
#16
Davendra P S Sohal, Field F Willingham, Massimo Falconi, Kara L Raphael, Stefano Crippa
Pancreatic cancer is a growing problem in oncology, given slowly rising incidence and continued suboptimal outcomes. A concerted effort to reverse this tide will require prevention, early diagnosis, and improved systemic therapy for curable disease. We focus on these aspects in detail in this study. Hereditary pancreatic cancer is an underappreciated area. With the growing use of genomics (both somatic and germline) in cancer care, there is increasing recognition of hereditary pancreatic cancer cases: around 10% of all pancreatic cancer may be related to familial syndromes, such as familial atypical multiple mole and melanoma (FAMMM) syndrome, hereditary breast and ovarian cancer, Lynch syndrome, and Peutz-Jeghers syndrome...
2017: American Society of Clinical Oncology Educational Book
https://www.readbyqxmd.com/read/28550392/treatment-of-pediatric-average-risk-medulloblastoma-using-craniospinal-irradiation-less-than-2500-cgy-and-chemotherapy-single-center-experience-in-korea
#17
Jong Hyung Yoon, Kyung Duk Park, Hyoung Jin Kang, Hyery Kim, Ji Won Lee, Seung-Ki Kim, Kyu-Chang Wang, Sung-Hye Park, Il Han Kim, Hee Young Shin
BACKGROUND: Although craniospinal irradiation (CSI) of 2340 cGy plus tumor booster with chemotherapy have been established as a standard treatment of childhood average-risk (AvR) medulloblastoma (MBL) in Western counties, there are a few recent reports in outcomes of AvR MBL using this strategy in Korean and other Asian children. We investigated the outcome of the Korean children with AvR MBL who were treated with CSI <2500 cGy and chemotherapy. METHODS: Between January 2001 and December 2010, clinical characteristics and outcomes of 42 patients who were diagnosed with AvR MBL postoperatively and treated with radiation including CSI <2500 cGy and chemotherapy in Seoul National University Children's Hospital were analyzed...
May 27, 2017: World Journal of Pediatrics: WJP
https://www.readbyqxmd.com/read/28541920/distributed-optimization-design-of-continuous-time-multiagent-systems-with-unknown-frequency-disturbances
#18
Xinghu Wang, Yiguang Hong, Peng Yi, Haibo Ji, Yu Kang
In this paper, a distributed optimization problem is studied for continuous-time multiagent systems with unknown-frequency disturbances. A distributed gradient-based control is proposed for the agents to achieve the optimal consensus with estimating unknown frequencies and rejecting the bounded disturbance in the semi-global sense. Based on convex optimization analysis and adaptive internal model approach, the exact optimization solution can be obtained for the multiagent system disturbed by exogenous disturbances with uncertain parameters...
May 24, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28541918/consensus-of-heterogeneous-linear-multiagent-systems-with-communication-time-delays
#19
Xiang Xu, Lu Liu, Gang Feng
This paper studies the consensus problem of heterogeneous linear multiagent systems with arbitrarily large constant, time-varying, or distributed communication delays. Novel distributed dynamic controllers are proposed for such multiagent systems with fixed and switching directed communication topologies, respectively. It is shown that the controlled heterogeneous linear multiagent system can reach consensus for arbitrarily large constant, time-varying, and distributed communication delays under some sufficient conditions...
May 23, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28541231/distributed-time-varying-formation-robust-tracking-for-general-linear-multiagent-systems-with-parameter-uncertainties-and-external-disturbances
#20
Yongzhao Hua, Xiwang Dong, Qingdong Li, Zhang Ren
This paper investigates the time-varying formation robust tracking problems for high-order linear multiagent systems with a leader of unknown control input in the presence of heterogeneous parameter uncertainties and external disturbances. The followers need to accomplish an expected time-varying formation in the state space and track the state trajectory produced by the leader simultaneously. First, a time-varying formation robust tracking protocol with a totally distributed form is proposed utilizing the neighborhood state information...
May 18, 2017: IEEE Transactions on Cybernetics
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