Abstract:
:This paper represents recent results on the development of optimal analytic solutions to the variation problem of trajectory optimization and their application in the construction of on-board guidance laws. The importance of employing the analytically integrated trajectories in a mission design is discussed. It is assumed that the spacecraft is equipped with a power-limited propulsion and moving in a central Newtonian field. Satisfaction of the necessary and sufficient conditions for optimality of trajectories is analyzed. All possible thrust arcs and corresponding classes of the analytical solutions are classified based on the propulsion system parameters and performance index of the problem. The solutions are presented in a form convenient for applications in escape, capture, and interorbital transfer problems. Optimal guidance and neighboring optimal guidance problems are considered. It is shown that the analytic solutions can be used as reference trajectories in constructing the guidance algorithms for the maneuver problems mentioned above. An illustrative example of a spiral trajectory that terminates on a given elliptical parking orbit is discussed.
journal_name
Ann N Y Acad Scijournal_title
Annals of the New York Academy of Sciencesauthors
Azimov D,Bishop Rdoi
10.1196/annals.1370.002subject
Has Abstractpub_date
2005-12-01 00:00:00pages
189-209eissn
0077-8923issn
1749-6632pii
1065/1/189journal_volume
1065pub_type
杂志文章abstract::Scleroderma renal crisis (SRC) is a major complication in patients with systemic sclerosis (SSc). SRC occurs during the first 4 years of disease evolution in more than 75% of the cases, almost exclusively in patients with diffuse SSc. Other risk factors, including preceding corticosteroid therapy, have been associated...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
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abstract::Primary hyperparathyroidism (PHPT) results from excessive secretion of parathyroid hormone (PTH), and catabolic and anabolic effects of PTH on bone may lead to overall deleterious effects on skeleton. The aim of this study was to analyze the changes in lumbar spine bone mineral density (BMD) in patients with PHPT who ...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1196/annals.1402.031
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abstract::In the present study, we examined the potential impact of a T-to-C substitution at nucleotide 1519 of the GABA(A)alpha6 receptor subunit gene (GABRA6) on obesity and obesity-related phenotypes as well as circulating hormones, including salivary cortisol, in 284 unrelated Swedish men born in 1944. The subjects were gen...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.2002.tb04318.x
更新日期:2002-06-01 00:00:00
abstract::Mouse Schwann cells and rat RN22 schwannoma cells cultured in the absence of neurons and fibroblasts produce typical basement membrane proteins. Heparan sulfate proteoglycan (low density form), nidogen, and protein BM-40 were identified by radioimmunoassays, immunoblotting, and by immunoprecipitation after metabolic l...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.1986.tb48078.x
更新日期:1986-01-01 00:00:00
abstract::Preeclampsia is associated with an increased release of factors from the placental syncytium into maternal blood, including the antiangiogenic factors soluble fms-like tyrosine kinase-1 and soluble endoglin, the antifibrinolytic factor plasminogen activator inhibitor-1, prostanoids, lipoperoxides, cytokines, and micro...
journal_title:Annals of the New York Academy of Sciences
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更新日期:2008-04-01 00:00:00
abstract::Neuromodulation denotes controlled electrical stimulation of the central or peripheral nervous system. The three forms of neuromodulation described in this paper-deep brain stimulation, vagus nerve stimulation, and transcranial magnetic stimulation-were chosen primarily for their demonstrated or potential clinical use...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
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abstract::Asbestos contamination of relatively contained environments within structures can occur under many conditions and in association with various activities. Such contamination persists and can potentially expose all structure users. The more significant contamination levels are associated with disturbance of friable asbe...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
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更新日期:1979-01-01 00:00:00
abstract::Agonist interactions with release processes do not validate autoreceptor operation. Instead, the data suggests that autoreceptors function as homoreceptors. Declining efficacy of agonist inhibition of transmitter release with increasing stimulation "intensity" is not assignable to competition with endogenous transmitt...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.1990.tb31980.x
更新日期:1990-01-01 00:00:00
abstract::This article reviews research on the Finnish model of peer-group mentoring (PGM). The theoretical foundation of the model is based on the constructivist theory of learning, the concept of autonomy in teaching profession, peer learning, and narrative identity work. The model has been disseminated nationwide in the educ...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
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abstract::A human T-T hybridoma was produced, which was a fusion product between and HGPRT-deficient T-cell line, Jurkat 3, and an OKT4+ activated peripheral blood T-cell. The hybrid expressed a receptor for IgM Fc and was negative for IgA Fc. It was shown to produce a factor capable of specifically enhancing IgA production and...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
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更新日期:1983-06-30 00:00:00
abstract::Taken together with electrophysiological data, these results suggest that in states of DA deficiency, systemically administered L-dopa or DA agonist drugs inhibit cell firing in the major output nuclei of the basal ganglia (GPI and SNPR). We propose that DA produces this net effect by a direct influence on the striato...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
doi:10.1111/j.1749-6632.1997.tb48626.x
更新日期:1997-12-19 00:00:00
abstract::Few studies have evaluated the impact of nutritional supplementation among pregnant adolescents. We examined the effects of the Rang Din Nutrition Study (RDNS) interventions on children born to mothers <20 years of age. The RDNS was a cluster-randomized effectiveness trial with four arms: (1) women and children both r...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,随机对照试验
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更新日期:2020-05-01 00:00:00
abstract::This review discusses the available clinical trials in which steroids have been used in the (adjuvant) treatment of rheumatoid arthritis. Glucocorticosteroids have a positive effect on symptoms and signs of inflammation, but probably not on structural damage. Therefore glucocorticosteroids should be used as part of a ...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
doi:10.1111/j.1749-6632.1999.tb07659.x
更新日期:1999-06-22 00:00:00
abstract::The Ca2+-pump ATPase of human RBC membranes appears to be exquisitely sensitive to a variety of amphipathic molecules. The acidic protein calmodulin (CaM) activates the enzyme some three- to fivefold with an apparent Kd of approximately 1-5 nM. A variety of other amphipathic anions, such as acidic phospholipids, free ...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.1982.tb25755.x
更新日期:1982-01-01 00:00:00
abstract::There is growing interest in the use of statins, HMG-CoA reductase inhibitors, for treating specific neurodegenerative diseases (e.g., cerebrovascular disease, Parkinson's disease, Alzheimer's disease, multiple sclerosis) and possibly traumatic brain injury. Neither is there a consensus on the efficacy of statins in t...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
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更新日期:2010-06-01 00:00:00
abstract::The structure of a growing number of glycation and advanced glycation end products has been elucidated. Measuring these products can be used to assess cumulative glycemic and glycoxidative damage in diabetes and other chronic conditions. The predictive power of a given glycation product can be tested in large prospect...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
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更新日期:2005-06-01 00:00:00
abstract::TP73, as a TP53 homologue, drew the attention of tumor biologists because it is rarely mutated in human cancers and can induce cell cycle arrest and apoptosis by activating genes also regulated by p53. However, TP73 harbors an additional promoter that produces a dominant negative p73 protein (deltaNp73) having the opp...
journal_title:Annals of the New York Academy of Sciences
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更新日期:2004-12-01 00:00:00
abstract::The theme of this presentation has been to show that the control of transmitter release at the neuromuscular synapse is achieved by extracellular and intracellular calcium. For the fast information transfer represented by the end-plate potential, the electrochemical gradient for calcium across the presynaptic membrane...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
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更新日期:1978-04-28 00:00:00
abstract::Lewisite and many other similar arsenicals are warfare vesicants developed and weaponized for use in World Wars I and II. These chemicals, when exposed to the skin and other epithelial tissues, cause rapid severe inflammation and systemic damage. Here, we show that topically applied arsenicals in a murine model produc...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
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更新日期:2020-11-01 00:00:00
abstract::Calcium-dependent activator protein for secretion (CAPS) was initially identified in brain cytosol based on its ability to reconstitute calcium-triggered dense-core vesicle (DCV) exocytosis in permeable cell lines (PC12) of adrenal chromaffin origin. Current evidence indicates that CAPS functions selectively in DCV ex...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
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abstract::Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is a rare hereditary disease characterized by recurrent transient ischemic attacks, strokes, and vascular dementia. Various mutations in the Notch3 gene cause the disease, whereas the mechanism of how they cause the di...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
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更新日期:2002-11-01 00:00:00
abstract::The number of physiologic and metabolic phenomena amenable to analysis using magnetic resonance (MR) techniques is increasing every year. MR techniques can now evaluate tissue parameters relevant to TCA cyclemetabolism, anerobic glycolysis, ATP levels, blood-brain barrier permeability, macrophage infiltration, cytotox...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
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更新日期:1999-01-01 00:00:00
abstract::The article describes the process of planning the Memorial of Disappeared Detained Citizens in the City of Montevideo, Uruguay, the construction of which was completed in January 2003. It explores the role that memory, planning, and reconciliation carried out in the public realm can play in the context of an urban env...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
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更新日期:2004-06-01 00:00:00
abstract::Six highly trained marathon runners developed myocardial infarction. One of the two cases of clinically diagnosed myocardial infarction was fatal, and there were four cases of angiographically-proven infarction. Two athletes had significant arterial disease of two major coronary arteries, a third had stenosis of the a...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
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更新日期:1977-01-01 00:00:00
abstract::The psychostimulant 3,4-,ethylenedioxymethamphetamine (MDMA, "ecstasy") is known to induce hyperthermia and alterations in neurochemical metabolism in the CNS. However, the detailed cellular or molecular mechanisms behind MDMA-induced neurotoxicity are still not well known. Since MDMA induces profound hyperthermia tha...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
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更新日期:2008-10-01 00:00:00
abstract::I2-imidazoline receptors (I2-IR) are characterized by their high affinity for imidazolines and guanidines and medium affinity for imidazolidines. The differential recognition of I2-IR by amiloride led to subtype these sites as amiloride-sensitive (I2A-IR) and amiloride-insensitive (I2B-IR). I2-IR labeled with [3H]idaz...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
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更新日期:1999-06-21 00:00:00
abstract::Murine typhus is a cause of fever of intermediate duration in the south of Spain, where antibodies against Rickettsia typhi and Rickettsia felis were observed in humans. This study presents the first report from the northeast of Spain. Human serum samples were tested by serological test. R. typhi and R. felis seroprev...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
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更新日期:2006-10-01 00:00:00
abstract::Three distinct pathological conditions, related to different means by which dense intralabyrinthine particles interfere with the function of a semicircular canal and cause nystagmus and vertigo, are amenable to treatment with repositioning maneuvers. Known as benign paroxysmal positional vertigo and variants, these co...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.2001.tb03744.x
更新日期:2001-10-01 00:00:00
abstract::In this paper we have sought to identify differences in alcohol consumption patterns and problems among young adult males from white, black, and Hispanic ethnic groups entering drug treatment programs. In overall consumption patterns we found results similar to those obtained in general population studies. However, ab...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.1986.tb29611.x
更新日期:1986-01-01 00:00:00
abstract::This paper summarizes the goals of this section and considers current knowledge about the association between hormonal changes that occur over pubertal development and the changes in behavior and brain function over the adolescent period. It reviews the cascade of neural and hormonal changes that occur with puberty; d...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
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更新日期:2004-06-01 00:00:00