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1.
Interval standard neural network models for nonlinear systems   总被引：1，自引：0，他引：1  
INTRODUCTION Neural networks have been successfully em- ployed for controlling nonlinear systems since the 1990’s (Narendra and Parthasarathy 1990; Hunt et al., 1992; Suykens et al., 1996). In these nonlinear control systems, neural networks have been used either for modelling the system to be controlled, or for design- ing a controller, or both. Recently, the robustness issue has been an important focus of research in neuro-control circles (Suykens et al., 1996; Wams et al., 1999; Aya…  相似文献   

2.
Objective： There is no report on Bickerstaff s brainstem encephalitis （BBE） patients in China. We here report the first case of BBE in China. Methods： Clinical features, results of electromyography, eleetroencephalography （EEG）, magnetic resonance imaging （MRI） and cerebrospinal fluid （CSF） examination were studied to clarify the characteristics of this syndrome. Results： A 44-year-old man presented himself at our inpatient department with somnolence and dizziness as his initial symptoms. He developed multiple cranial nerves paralysis especially internal and external ophthalmoplegia, ataxia and tetraparesis within 1 week. His condition rapidly deteriorated, and he experienced coma. Electromyography showed indications of peripheral nerve dysfunction, electroencephalography revealed loss of basic rhythm, MR1 demonstrated high-intensity abnormalities on T2-weighted images of medulla oblongata, and CSF albuminocytological dissociation was defined abnormally as high protein. Ten months later, he almost completely recovered. Conclusion： BBE, fisher syndrome （FS） and Guillain-Barre syndrome （GBS） are similar clinically; BBE and FS were proposed to be the variant of GBS.  相似文献   

3.
INTRODUCTION Microarray technique is a powerful laboratory tool for simultaneously monitoring genome-wide expression in different conditions. One of the most important applications of microarray technique is the classification of tumor subtypes or different disease states to facilitate clinical researchers in diagnostic, therapeutic or prognostic decisions for patients (Golub et al., 1999; Alizadeh et al., 2000; Spindler, 2006). The generally used approaches, such as cluster analysis and…  相似文献   

4.
INTRODUCTION Pulmonary veins(PV)may play an importantrole in both the initiation and maintenance of parox-ysmal atrial fibrillation(AF)(Fynn and Kalman,2004).Curative treatment of patients with paroxys-mal AF is possible by radiofrequency ablation,mak-ing segmental or linear lesions around the ostia ofPVs using a3-dimentional mapping system(Carto)(Pappone et al.,2000;2001;Oral et al.,2003).Multi-slice spiral computed tomography(MSCT)could generate a3-dimentional image of left atrium…  相似文献   

5.
Aortic stenosis(AS)is a progressive heart valve disease occurring predominantly in older patients.According to a survey in a western country,the prevalence of AS is nearly 6.4%in patients over 75 years old(Carabello and Paulus,2009).Transcatheter aortic valve replacement(TAVR)is an alternative method for AS patients.Previous studies have described how up to 66%of TAVR patients have concomitant baseline kidney dysfunction(Ferro et al.,2015;Gargiulo et al.,2015).The majority of patients can benefit from the TAVR procedure with the recovery of kidney function.  相似文献   

6.
Surgical results of pars plana vitrectomy combined with phacoemulsification   总被引：2，自引：0，他引：2  
INTRODUCTION Cataract is frequently associated with vitreo-retinal pathology such as vitreous hemorrhage,retinal detachment,proliferative vitreoretinal disease,espe-cially in patients with diabetes mellitus,ocular trauma and elderly population(Vatavuk and Pentz,2004;Vatavuk et al.,2005).The cataract can be removed together with vitrectomy or later on in a separate surgical procedure(Tyagi et al.,1998;Lam et al.,1998).The primary indication for the primary re-moval of cataract and vitrect…  相似文献   

7.
INTRODUCTION Costimulatory signals play a vital role in T cell activation. B7/CD28 and CD40/CD40L have been well-established as important costimulatory pathways, with the blockade of either resulting in suppression or anergy of T cells associated with prolongation of graft survival (Akalin et al., 1996; Bolling et al., 1996; Kita et al., 1999; Reddy et al., 2001; Laumonier et al., 2003; Thiel et al., 2005). Cytotoxic T lymphocyte associated antigen-4 (CTLA4), a ligand for B7, de-…  相似文献   

8.
INTRODUCTION Rocuronium bromide is a new steroidal nonde- polarizing neuromuscular blocking drug that has a faster onset of action than other nondepolarizing neuromuscular blocking drugs. The liver is the major route for its elimination. On the other hand, impaired liver function does not alter either atracurium’s elimination or plasma clearance (Ward and Neill, 1983; Pitter et al., 1990). The exclusion of the hepatic circulation and function during the anhepatic phase of orthotopic liv…  相似文献   

9.
Poisoning is often characterized by the acute onset,rapid progress,or specific manifestations of pathological symptoms,such as pulmonary fibrosis due to paraquat poisoning or high mortality arising from dinitrophenol intoxication (Jiang et al.,2016;Wang et al.,2017;Feng et al.,2018;Lu,2018;Xu and Lu,2019).Unlike general poisoning,however,the manifestation of n-hexane intoxication is subacute,and its clinical symptoms are dormant,and thus the provision of a timely and correct diagnosis is often difficult.  相似文献   

10.
INTRODUCTION Porous silicon (PS) attracts the attention of many researchers due to the possibility of developing PS based devices, including optoelectronics, photo re- sistors, solar cells and light emitting diodes (Balucani et al., 1999; Palma et al., 1999a; Stievenard and Deresmes, 1995). To integrate PS into electronic circuits or to develop PS based devices, the electrical properties of this material must be studied thoroughly. It is a difficult case because this material has a ve…  相似文献   

11.
INTRODUCTION The past decades witnessed unprecedented ad-vances in the imaging science fields(Yelbuz et al.,2002;Campagnola et al.,2002;Sharpe et al.,2002).The technique of3D image reconstruction andanalysis plays a significant role in the basic researchof life science,which developed from2D imageprocessing but provides more information than2Dimage,and has rapidly expanded to molecular andcellular field(Guo et al.,1995;Trehan et al.,2003).Despite the rapid development of the new field,…  相似文献   

12.
INTRODUCTION In recent years, thermo-ablation of liver cancerhas received increasing attention. Generally this canbe achieved by radiofrequency (RF) or Nd:YAG laser(Tanabe et al., 2004; Nikfarjam and Christophi, 2003;Erce and Parks, 2003). Of great importance to themethod’s success is the size of the induced coagula-tion necrosis; the lesion size largely depends on thetemperature distribution in the target volume, whichis determined partly by the blood perfusion in thetarget or…  相似文献   

13.
INTRODUCTION Piezoelectric symmetric structures always play an important role in the use of piezoelectric materials (Olesiak and Pyryev, 1995; Ding et al., 2003; Wu et al., 2003). To improve the durability of this kind of piezoelectric structures, functionally gradient piezo- electric materials (FGPM) have been developed and used to produce these devices such as sensors and actuators (Hauke et al., 2000; Zhu et al., 1995). For the case when a rectangular plate made of function- ally gr…  相似文献   

14.
INTRODUCTION Homoharringtonine (HHT) is a cephalotoxin alkaloid with anti-leukemic activity and had been used successfully in the treatment of acute and chronic myeloid leukemias (O払rien et al., 1995; 1999; Feldman et al., 1992). The principal mecha-nism of action by HHT is the inhibition of protein synthesis in a dose- and time-dependent manner by binding to ribosome and inhibiting polypeptide chain elongation (Tujebajeva et al., 1989; Zhou et al., 1995). HHT had been shown to indu…  相似文献   

15.
INTRODUCTION The bands of near-infrared (NIR) spectra have low absorptivities, which allow in situ analysis of chemical and biological materials with no or little sample preparation. Therefore, as one of the most important nondestructive analytical techniques, NIR spectroscopy is being extensively applied in the fields of agriculture, industry, biotechnology and medicine (Siesler et al., 2002; Scarff et al., 2006; Ward et al., 2006). Recently, with instrumental developments such as Fou…  相似文献   

16.
INTRODUCTION The richness of fundamental phenomena and the potential applications in nano-technologies has ar- oused rapidly growing interest in nano-dimensional materials. Quasi-one-dimensional (1D) nano-semi- conductors in the form of nanowires and nanoribbons have recently been successfully fabricated in many laboratories and by many methods (Wu et al., 2004; Yang et al., 2005; Gan et al., 2004; Soumitra et al., 2006). To synthesize CdS nanowires, people have developed a series of sy…  相似文献   

17.
INTRODUCTION 3D CAD systems for the feature-based B-rep solid models (Choi et al., 2002; Kim et al., 2003; 2005; Koo and Lee, 2002; Lee et al., 2004; Lee, 2005a) are becoming more suitable for CAD when compared with the conventional polygon-based mul- tiresolution modelling in computer graphics (Cignoni et al., 1998; Schr?der et al., 1992). As illustrated in Fig.1b, the object of the feature-based multiresolution modelling is a solid model where the suppressed ob- jects are form feat…  相似文献   

18.
INTRODUCTION The waveguide properties of linear arrays (chains) of silver nano-particles at optical frequencies are well known (Krenn et al., 1997; 1999; Tretyakov and Viitanen, 2000; Girard et al., 1994; Weber and Ford, 2004). Silver spheres and ellipsoids can support forward or backward waves along the chain depend- ing on their polarization state and the eigenfrequency (Krenn et al., 1999; Tretyakov and Viitanen, 2000; Girard et al., 1994; Weber and Ford, 2004). At com- paratively …  相似文献   

19.
INTRODUCTION Allyl selenides have drawn much attention as a class of important intermediates in organic synthesis. For example, they are useful synthetic precursors for the [1,3]- or [2,3]-sigmatropic rearrangements (Shar-pless and Lauer, 1972; Fujita et al., 1998; Carter and Bourland, 2000), allylic homocoupling reactions (Masugama et al., 1989), and various other chemical transformations (Shea et al., 1986; Back and Moussa, 2002; 2003). Generally, allyl selenides are synthe-sized fr…  相似文献   

20.
INTRODUCTION Dementia is becoming a big problem in modern life, and particularly, it takes place more frequently in mental job group and the elderly. Today, more than 20 million people in the world catch this disease (Francis et al., 1999; Almkvist et al., 1998). So how to detect underlying dementia and take preventive measure is critical for both the doctors and their patients. People with dementia always behave slowly and their memory decreases with the development of the disease. Curr…  相似文献   

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