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The Convergence of Parameter Estimates and the real Structure Information of Plant are both Unnecessary for a General Self-Tuning Control System - Arbitrary Deterministic Plant

The Convergence of Parameter Estimates and the Real Structur...

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第24届中国控制与决策会议

作者： Weicun Zhang, Qing Li , Yinmei Xu, Tao Feng School of Automation Science and Electrical Engineering University of Science and Technology Beijing Beijing 100083 P. r. China

This paper is concerned with the stability and convergence of a general deterministic self-tuning control （STC） system, which consists of arbitrary control strategy and arbitrary estimation algorithm. The plant may be linear or non-linear, time-invariant or time varying. The conditions required for global stability and convergence are relaxed, i.e., the convergence of parameter estimates and the real structure information of plant are both removed. It is therefore argued that external excitation signal is not necessary for deterministic STC system. In other words, feedback information of STC system itself is sufficient to achieve the control objective （regulation or tracking）. The key point is that with the help of Virtual Equivalent System （ves. concept, the original nonlinear dominant （nonlinear in structure） problem of STC is converted to a linear dominant （linear in structure） problem- deterministic slow switching control system.

关键词： deterministic self-tuning control stability convergence virtual equivalent system slow switching

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CT透视引导下颈段硬膜外类固醇注射液扩散程度的CT横断面评估

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国际医学放射学杂志 2019年第6期 732-732页

作者： T.J.Amrhein E.Bozdogan S.Vekaria P.Patel r.Lerebours S.Luo 杨玉婷 Department of radiology Duke University Medical Center

摘要以往研究使用平面透视法分析了颈椎硬膜外类固醇注射(CILESI)期间对比剂的扩散情况,发现注射液在腹侧硬膜外间隙(ves.的扩散率存在广泛差异。在体层CT上能

关键词：硬膜外神经孔注射液 CT 类固醇

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轻度视乳头水肿及假性视乳头水肿患者视网膜神经纤维层的OCT研究

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世界核心医学期刊文摘（眼科学分册） 2005年第8期1卷 40-40页

作者： Karam E.Z. Hedges T.r. 邢咏新 New England Eye Center Box 381 750 Washington Street Boston MA 02111 United States Dr.

Aims: To determine the degree to which optical coherence tomography (OCT) can distinguish differences in retinal nerve fibre layer (rNFL) thickness between ey es with mild papilloedema, pseudopapilloedema, and normal findings. Methods: 13 patients with mild papilloedema, 11 patients with congenitally crowded optic ner ves. and 17 normal subjects underwent neuro-ophthalmic examination, automated v isual field testing, and fundus photography. Spinal fluid pressure measurements were obtained in a subgroup of five patients with pseudopapilloedema and 11 pati ents with mild papilloedema. Circular OCT scans using a diameter of 3.38 mm surr ounding the optic disc were performed in each eye of patients and subjects. Fund us photographs were analysed by two observers who diagnosed crowding or papilloe dema and graded amounts of swelling. Findings were assessed by descriptive stati stics and variance analysis. results: rNFL thickness was greater in me superior and inferior quadrants and showed a high degree of correlation between each grou p of patients and subjects. A statistically significant difference was found in mean rNFL thickness between both groups of patients with optic disc swelling and normal subjects. However, there was not a statistical difference in mean nerve fibre layer thickness between patients with papilloedema and those with congenit ally crowded optic nerves. Conclusions: OCT demonstrates measurable differences in nerve fibre layer thickness between normal subjects and patients with either papilloedema or pseudopapilloedema. However, OCT does not appear to differentiat e between those individuals with congenitally crowded optic nerves.and those wit h mild papilloedema caused by increased intracranial pressure.

关键词：假性视乳头水肿 OCT研究自动视野计眼底照相 rNFL 视神经纤维摄影检查脑脊液压力神经眼科学描述性统计学

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2例青少年的阴茎皮下环形肉芽肿

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世界核心医学期刊文摘（儿科学分册） 2006年第1期2卷 44-44页

作者： Sidwell r.U. Green J.S.A. Agnew K. 郭战宏 Department of Dermato logy Chelsea and Westminster Hospital SW10 9NH LondonUnited Kingdom

Granuloma annulare (GA) is a benign inflammatory disorder of unknown etiology characterized histologically by dermal palisading granulomas with central degene ration of collagen (necrobiosis). There is a rare subcutaneous clinical variant, this occurring more frequently in children than in adults and very rarely invol ves.the penis. We describe 2 cases of penile subcutaneous GA developing in adole scent boys who to our knowledge has not previously been described in literature. Both were initially treated with surgical excision. Circumcision was performed on one of the boys, with subsequent improvement with the resolution of most of t he nodules. Granuloma annulare of the penis is very rare, with only 7 cases repo rted to date [Narouz N, Allan PS, Wade AH. Penile granuloma annulare. Sex Transm Infect 1999;75(3):186-7; Trap r,Wiebe B. Granuloma annulare localised to the s haft of the penis. Scand J Urol Nephrol 1993;27(4):549-51; Laird SM. Granuloma annulare of the penis. Genitourin Med 1992;68(4):277; Hillman rJ, Waldron S, Wal ker MM, et al. Granuloma annulare of the penis. Genitourin Med 1992;68(1):47-9; Kossard S, Collins AG,Wegman A, et al. Necrobiotic granulomas localised to the penis: a possible variant of subcutaneous granuloma annulare. J Cutan Pathol 199 0;17(2):101-4] and no previous reports in children or adolescents to our knowle dge. All except one of the cases reported so far were of the subcutaneous (nodul ar) form of GA.

关键词：环形肉芽肿包皮环切术手术切除治疗炎症性病变渐进性坏死蛋白变性组织学特点

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