Jinan, China

Shandong Normal University is a university located in Jinan City, Shandong Province, China. It is one of the earliest institutions of higher learning established in Shandong Province since the founding of the People’s Republic of China. Wikipedia.

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Li X.,Shandong Normal University | Song S.,Tsinghua University
IEEE Transactions on Neural Networks and Learning Systems | Year: 2013

In this paper, a class of recurrent neural networks with discrete and continuously distributed delays is considered. Sufficient conditions for the existence, uniqueness, and global exponential stability of a periodic solution are obtained by using contraction mapping theorem and stability theory on impulsive functional differential equations. The proposed method, which differs from the existing results in the literature, shows that network models may admit a periodic solution which is globally exponentially stable via proper impulsive control strategies even if it is originally unstable or divergent. Two numerical examples and their computer simulations are offered to show the effectiveness of our new results. © 2012 IEEE.

The tight-binding method is employed to investigate the effects of three typical in-plane electric fields on the electronic structure of a triangular zigzag graphene quantum dot. The calculation shows that the single-electron eigenstates evolute independently in two subspaces no matter how the electric fields change. The electric field with fixed-geometry gates chooses several scattered parts of the zero-energy eigenspace as the new zero-energy eigenstates, regardless of the field strength. Moreover, the new zero-energy eigenstates remain unchanged and the associated levels are linear with the field strength. In contrast, the new nonzero-energy eigenstates mix mutually and the associated levels are nonlinear with the field strength. By comparing the effects of three electric fields, we demonstrate that the degeneracy of the zero-energy eigenstates accounts for the linearity of the associated levels. © 2014 The Royal Society of Chemistry.

Ding M.,Shandong Normal University
American Journal of Physical Medicine and Rehabilitation | Year: 2012

This focused review summarizes and critically evaluates clinical trial evidence for the effectiveness of Tai Chi as a supportive therapy for stroke rehabilitation. All prospective, controlled clinical trials published in English or Chinese and involving the use of Tai Chi by survivors of stroke were searched in eight electronic databases. Information from the included studies was extracted and synthesized. The methodological quality of all studies was assessed with the Jadad score. Five randomized controlled trials, four in English and one in Chinese, met the inclusion criteria and were reviewed. The methodological quality of the trials was moderate (Jadad score, range, 1-4; average score, 2.6). Meta-analysis was not performed because of the heterogeneity of the study conditions and outcome measures. Three studies reported benefits of Tai Chi with respect to improved balance in participants who have had a stroke. Three studies assessed mobility function and reported no improvement after Tai Chi intervention in survivors of stroke. Improvements in quality-of-life and mental health were reported in three trials. This focused review suggests that Tai Chi exercise might be beneficial with respect to balance, quality-of-life, and mental health in survivors of stroke. More rigorous randomized controlled trials are required to determine whether Tai Chi is effective in stroke rehabilitation. Copyright © 2012 by Lippincott Williams & Wilkins.

Shi F.,Shandong Normal University
International Journal of Hydrogen Energy | Year: 2010

The microstructure and hydrogen permeability of the Nb40Hf 30Ni30 ternary alloys were investigated in particular. The as-cast Nb40Hf30Ni30 alloy consists of the bcc- (Nb,Hf) solid solution, the Bf-HfNi compound and the fine eutectic phase of {(Nb,Hf) + HfNi}. The annealed Nb40Hf 30Ni30 alloy consists of the bcc-(Nb, Hf) solid solution and the fine eutectic phase of {(Nb,Hf) + HfNi}. The as-cast Nb 40Hf30Ni30 alloy shows a high Φ value of 4.3 × 10-8 [mol H2 m-1 s-1 Pa-0.5] at 673 K, and for the annealed Nb40Hf 30Ni30 alloy, the Φ value is 3.8 × 10 -8 [mol H2 m-1 s-1 Pa -0.5] at 673 K. Annealing can't enhance the hydrogen permeability of the Nb40Hf30Ni30 ternary alloy. © 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

A sensitive and selective electrochemical method was developed for simultaneous determination of uric acid (UA), xanthine (XA) and hypoxanthine (HX) based on a poly (pyrocatechol violet)/carboxyl functionalized multi-walled carbon nanotubes composite film modified electrode. The preparation and basic electrochemical performance of the novel composite film modified glassy carbon electrode were investigated in details. The electrochemical behaviors of UA, XA and HX at the modified electrode were studied by cyclic voltammetry. The results showed that this new electrochemical sensor exhibited excellent electrocatalytic activity towards the oxidation of the three analytes. The mechanism of catalysis was discussed. The anodic peaks of the three species were well defined with lowered oxidation potential and enhanced oxidation peak currents, so the modified electrode was used for simultaneous voltammetric measurement of UA, XA and HX by differential pulse voltammetry. Under the optimum conditions, the detection limits were 0.16μmolL -1 for UA, 0.05μmolL -1 for XA and 0.20μmolL -1 for HX, respectively (S/N of 3). The proposed method has been successfully applied to simultaneous determination of UA, XA and HX in human serum samples. © 2011 Elsevier B.V.

Wu P.,Nanjing University | Wu P.,University of Sichuan | Hou X.,University of Sichuan | Xu J.-J.,Nanjing University | And 2 more authors.
Chemical Reviews | Year: 2014

Electrochemiluminescence (ECL), also referred to as electrogenerated chemiluminescence, is chemiluminescence triggered by electrochemical processes. The combination of chemiluminescence and electrochemistry brings ECL many unique advantages such as rapidity, high sensitivity, and simplified optical setup. As an analytical technique, ECL does not require the use of any external light source. Thus, the attendant problems of scattered light and luminescent impurities are absent, which leads to low optical background noise and high sensitivity for analysis. Fundamentally, the ECL properties and biosensing strategies of QDs should have many relations to the PL of QDs. It was noticed that ECL from QDs in light of their PL properties and PL-based sensing strategies may provide much better understanding of the ECL. However, the critical relationship and difference between ECL and PL of QDs and also the similarities and differences of ECL biosensing schemes as compared to PL sensing strategies still remains unsummarized.

Li N.,Shandong Normal University | Chang C.,Shandong Normal University | Pan W.,Shandong Normal University | Tang B.,Shandong Normal University
Angewandte Chemie - International Edition | Year: 2012

Multidetector: A novel nanoprobe, based on multicolor nanoflares, for the simultaneous detection and imaging of three tumor-related mRNAs in living cells has been developed. The nanoprobe possesses high specificity, nuclease stability, and good biocompatibility. It can also effectively distinguish cancer cells from normal cells and identify changes in the levels of mRNA expression. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Liu Q.-K.,Shandong Normal University | Ma J.-P.,Shandong Normal University | Dong Y.-B.,Shandong Normal University
Journal of the American Chemical Society | Year: 2010

A series of reactive group functionalized aromatics, namely 2-furaldehyde, 3-furaldehyde, 2-thenaldehyde, 3-thenaldehyde, o-toluidine, m-toluidine, p-toluidine, and aniline, can be absorbed by a CdL2 (1; L = 4-amino-3,5-bis(4-pyridyl-3-phenyl)-1,2,4-triazole) porous framework in both vapor and liquid phases to generate new Gn⊂CdL2 (n = 1, 2) host-guest complexes. In addition, the CdL2 framework can be a shield to protect the active functional group (- CHO and - NH2) substituted guests from reaction with the outside medium containing their reaction partners. That is, aldehyde-substituted guests within the CdL 2 host become stable in the aniline phase and vice versa. Moreover, 1 displays a very strict selectivity for these reactive group substituted aromatic isomers and can completely separate these guest isomers under mild conditions (i.e., 2-furaldehyde vs 3-furaldehyde, 2-thenaldehyde vs 3-thenaldehyde, and o-toluidine vs m-toluidine vs p-toluidine). All adsorptions and separations are directly performed on the single crystals of 1. More interestingly, these reactive group substituted aromatics readily transform to the corresponding radicals within the CdL2 host upon ambient light or UV light (355 nm) irradiation. Furthermore, the generated organic radicals are alive for 1 month within the interior cavity in air under ambient conditions. Simple organic radicals are highly reactive short-lived species, and they cannot be generally isolated and conserved under ambient conditions. Thus, the CdL2 host herein could be considered as a radical generator and storage vessel. © 2010 American Chemical Society.

Zhu Q.,Ningbo University | Li X.,Shandong Normal University
Fuzzy Sets and Systems | Year: 2012

In this paper, we study a class of stochastic fuzzy delayed Cohen-Grossberg neural networks. Two kinds of stability are discussed in our investigation. One is exponential stability in the mean square and the other is almost sure exponential stability. First, some sufficient conditions are derived to guarantee the exponential stability in the mean square for the considered system based on the Lyapunov-Krasovskii functional, stochastic analysis theory and the Itô's formula as well as the Dynkin formula. Then, we further investigate the almost sure exponential stability by employing the nonnegative semi-martingale convergence theorem. Moreover, we prove that the addressed system is both almost sure exponentially stable and exponentially stable in the mean square under suitable conditions. Finally, three numerical examples are also given to show the effectiveness of the theoretical results. In particular, the simulation figures establish that fuzzy systems do have more advantages than non-fuzzy systems. © 2012 Elsevier B.V. All rights reserved.

Ma J.-P.,Shandong Normal University | Yu Y.,Shandong Normal University | Dong Y.-B.,Shandong Normal University
Chemical Communications | Year: 2012

A new 2D Cu(ii)-MOF generated from a fluorene-based ligand and Cu(NO 3) 2 was reported. It is an interesting visual colorimetric anion sensor. In addition, it can completely separate Cl -/Br -, Br -/I - and SCN -/N 3 - anions under ambient conditions. © 2012 The Royal Society of Chemistry.

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