Li Yongxin - Academia.edu (original) (raw)

Papers by Li Yongxin

Cochlear implants international, Jan 26, 2017

To provide multidisciplinary cochlear implant teams with a current consensus statement to support... more To provide multidisciplinary cochlear implant teams with a current consensus statement to support hearing preservation cochlear implantation (HPCI) in children, including those children with symptomatic partial deafness (PD) where the intention is to use electric-acoustic stimulation (EAS). The main objectives are to provide guidelines on who is a candidate, how to assess these children and when to implant if Med-El Flex electrode arrays are chosen for implantation. The HEARRING group reviewed the current evidence and practice regarding the management of children to be considered for HPCI surgery emphasizing the assessment needed prior to implantation in order to demonstrate the benefits in these children over time. The consensus statement addresses following three key questions: (1) Should these children be treated? (2) How to identify these children? (3) How to manage these children? The HEARRING group concludes that irrespective of the degree of residual hearing present, the conc...

Inorganic chemistry, Jan 28, 2017

Aryl bis(imino)acenaphthenes (Ar-BIANs) are well-established rigid and sterically bulky diimine l... more Aryl bis(imino)acenaphthenes (Ar-BIANs) are well-established rigid and sterically bulky diimine ligands, which are redox-noninnocent and versatile π-acceptors due to their low-lying π* orbitals and are frequently used to bind transition metals. However, the coordination chemistry of Ar-BIAN ligands to main group elements is not as well-developed as that of their transition metal counterparts. In particular, there are no comprehensive studies describing the spectroscopic and electrochemical properties of main group Ar-BIAN complexes. Herein, we report the synthesis and full characterization of a series of new indium(III) Ar-BIAN complexes, bearing 2,6-dialkyl (1b and 2b), 4-nitro (3b), and 4-dimethylamino (4b) groups at the aryl-diimine part of the ligand. Their optical and electrochemical properties have been revealed by UV-vis spectroscopy and cyclic voltammetry, respectively. Additionally, DFT calculations were performed to gain insights into the nature of the properties displayed.

Inorganic chemistry, Jan 30, 2017

The reactivity of L2PhB: (1; L = oxazol-2-ylidene) as well as its transition-metal (chromium and ... more The reactivity of L2PhB: (1; L = oxazol-2-ylidene) as well as its transition-metal (chromium and iron) complexes toward main-group substrates have been systematically examined, which led to the construction of B-E (E = C, Ga, Cl, H, F, N) bonds. The combination of 1 and triethylborane smoothly captured carbon dioxide concomitant with the formation of B-C and B-O bonds. The soft basic boron center in 1 readily reacted with soft acidic gallium trichloride (GaCl3) to afford the extremely stable adduct 4 involving a B-Ga dative bond. Electrophilic alkylation of a neutral tricoordinate organoboron was first achieved by the treatment of 1 with dichloromethane and methyl trifluoromethanesulfonate (MeOTf), both of which afforded ionic species featuring an additional B-C bond. Comparatively, redox reactions took place when halides of heavier elements such as germanium dichloride, dichlorophenylphosphine, and chlorodiphenylbismuth were employed as substrates, from which cationic species 7 bea...

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Acta Crystallographica Section E Structure Reports Online, Mar 1, 2009

Dalton transactions (Cambridge, England : 2003), May 26, 2016

Mechanochemistry is well-established in the solid-phase synthesis of inorganic materials but has ... more Mechanochemistry is well-established in the solid-phase synthesis of inorganic materials but has rarely been employed for molecular syntheses. In recent years, there has been nascent interest in 'greener' synthetic methods with less solvent, higher yields, and shorter reaction times being especially appealing to the fine chemicals and inorganic catalyst industries. Herein, we demonstrate that main-group indium(iii) complexes featuring bis(imino)acenaphthene (BIAN) ligands are readily accessible through a mechanochemical milling approach. The synthetic methodology reported herein not only bypasses the use of large solvent quantities and transition metal reagents for ligand synthesis, but also reduces reaction times dramatically. These new main-group complexes exhibit the potential to be reduced to indium(i) compounds, which may be employed as photosensitizers in organic catalyses and functional materials.

Journal of separation science, Jan 8, 2015

Enterovirus 71 and Coxsackievirus A16 are the main pathogens causing hand-foot-mouth disease. In ... more Enterovirus 71 and Coxsackievirus A16 are the main pathogens causing hand-foot-mouth disease. In this paper, microchip capillary electrophoresis with laser-induced fluorescence combined with one-step duplex reverse transcript-polymerase chain reaction has been developed for the detection of Enterovirus 71 and Coxsackievirus A16 in throat swab specimens. The specific reverse transcription-polymerase chain reaction amplicons labeled with SYBR Orange were separated by microchip capillary electrophoresis and detected by laser induced fluorescence detector within 7 min. The intraday and interday relative standard deviation of migration time for DNA Marker was in the range of 1.36-2.94 and 2.78-3.96%, respectively. The detection limits were as low as 2.06 × 10(3) copies/mL for Enterovirus 71 and 5 × 10(3) copies/mL for Coxsackievirus A16. No cross-reactivity was observed with rotavirus, astrovirus, norovirus, and adenovirus, which showed good specificity of the method. This assay was vali...

2009 International Conference on Information Technology and Computer Science, 2009

Packaging Technology and Science, 1995

Cylindrical bags made o f inorganic-filled PE film (active film) (AF) containing fresh water were... more Cylindrical bags made o f inorganic-filled PE film (active film) (AF) containing fresh water were applied t o storage o f living carp. The tops o f t h e bags were usually kept closed, w i t h the exception o f t h e moment f o r determining t h e content o f dissolved oxygen (DO). For comparison, a cylindrical glass jar and other cylindrical bags made o f plain PE film were used f o r t h e same test. The results show that the mean life o f carp in the AF bag was more than 64 h, whereas those i n the glass jar and the plain PE film bags were 25 and 26 h, respectively. The content o f DO i n t h e different types o f container w i t h living carp was measured. It indicated t h a t the content of DO in t h e AF bags was more than that in the others. Thus, it is significant t h a t it can be used t o store and transport aquatic plant and animal or other organisms in a closed container.

Journal of Mathematical Analysis and Applications, 2000

We give a generalization of Ekeland's ⑀-Variational Principle and of its Bor-wein᎐Preiss smooth v... more We give a generalization of Ekeland's ⑀-Variational Principle and of its Bor-wein᎐Preiss smooth variant, replacing the distance and the norm by a ''gauge-type'' lower semi-continuous function. As an application of this generalization, we show that if on a Banach space X there exists a Lipschitz ␤-smooth ''bump function,'' then every continuous convex function on an open subset U of X is densely ␤-differentiable in U. This generalizes the Borwein᎐Preiss theorem on the differentiability of convex functions.

Journal of Otology, Jun 1, 2006

Mandarin Chinese tone patterns vary in one of the four ways, i.e, (1) high level; (2) rising; (3)... more Mandarin Chinese tone patterns vary in one of the four ways, i.e, (1) high level; (2) rising; (3) low falling and rising; and (4) high falling. The present study is to examine the efficacy of an artificial neural network in recognizing these tone patterns. Speech data were recorded from 12 children (3-6 years of age) and 15 adults. All subjects were native Mandarin Chinese speakers. The fundamental frequencies (F0) of each monosyllabic word of the speech data were extracted with an autocorrelation method. The pitch data(i.e., the F0 contours) were the inputs to a feed-forward backpropagation artificial neural network. The number of inputs to the neural network varied from 1 to 16 and the hidden layer of the network contained neurons that varied from 1 to 16 in number. The output of the network consisted of four neurons representing the four tone patterns of Mandarin Chinese. After being trained with the Levenberg-Marquardt optimization, the neural network was able to successfully classify the tone patterns with an accuracy of about 90% correct for speech samples from both adults and children. The artificial neural network may provide an objective and effective way of assessing tone production in prelingually-deafened children who have received cochlear implants.

Proceedings of Spie the International Society For Optical Engineering, 2009