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Search Results: 1 - 10 of 120213 matches for " Huanhuan Wang "
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Iterative methods for the split common fixed-point problem in Hilbert spaces
Huanhuan Cui,Fenghui Wang
Mathematics , 2014,
Abstract: The split common fixed-point problem is an inverse problem that consists in finding an element in a fixed-point set such that its image under a bounded linear operator belongs to another fixed-point set. Recently Censor and Segal proposed an efficient algorithm for solving such a problem. However, to employ their algorithm, one needs to know a prior information on the norm of the bounded linear operator. In this paper we propose a new algorithm that does not need any prior information of the operator norm, and we establish the weak convergence of the proposed algorithm under some mild assumptions.
Reliability and Validity of a Chinese Version of the Students’ Attitudes toward Physical Education Scale and Its Related Factors  [PDF]
Huanhuan Hu, Jiali Duan, Guan Wang, Takashi Arao
Advances in Physical Education (APE) , 2014, DOI: 10.4236/ape.2014.44022
Abstract: This study aimed to examine the reliability and validity of a Chinese version of the Students’ Attitudes toward Physical Education Scale (SPEA), and to ascertain the associations between student attitudes toward physical education and gender, grade levels, school, and area. In 2013, a cross-sectional study was conducted in eight middle schools in Beijing, China. A sample of 1793 students was enrolled. Cronbach’s alpha and intraclass correlation coefficients (ICC) were performed to evaluate the scale’s internal and test-retest reliability. Construct validity was assessed with confirmatory factor analysis. Linear mixed models were used to examine the associations of attitude scores with gender, grade, school, and area (urban and suburban). Our results showed high reliability (Cronbach’s alpha = 0.90, ICC = 0.94; 95% CI, 0.92 - 0.96) of the SPEA. For the construct validity, results of confirmatory factor analysis showed an acceptable model fit. Overall, the mean of the attitude scores was 75.5 ± 13.4 out of 100. The attitude scores were found to be statistically different between grade levels, schools, and areas. No differences were found for gender. This study provides evidence that the SPEA is acceptable for the assessment of the attitude toward physical education in Chinese students. The school plays a more important role in the student attitudes than school locations (urban or suburban) in our study. For better understanding of students’ attitudes toward physical education, further studies that focus on the environment of physical education in schools, and use more representative samples of schools from various locations are warranted.
Altered Neurogranin Phosphorylation and Protein Levels Are Associated with Anxiety- and Depression-Like Behaviors in Rats Following Forced Swim Stress  [PDF]
Huanhuan Li, Wenjuan Lin, Junfa Li, Weiwen Wang
Journal of Behavioral and Brain Science (JBBS) , 2014, DOI: 10.4236/jbbs.2014.411050
Abstract: Here we tested the hypothesis that stress-induced alterations in Neurogranin (Ng) synthesis and/ or utilization might underlie stress-related depression and anxiety. Rats were randomly divided into five conditions: chronic swim stress (CS), acute swim stress (AS), and three control groups. The CS group was exposed to daily swim stress (5 min/day) for 14 consecutive days, the AS group received a single swim stress, and control groups were maintained in a stress-free condition. Both before and after swim stress, rats were tested for body weight gain, open-field locomotor activity, and saccharine preference. Ng and phospho-Ng (P-Ng) levels in the hippocampus and prefrontal cortex were determined by Western blot analysis. Compared to controls, CS animals displayed significantly decreased body weight gain, ambulation, and saccharine intake, and increased grooming behavior. CS animals had decreased Ng levels in the hippocampus and prefrontal cortex. In CS animals, Ng levels were positively correlated with saccharine intake and ambulation, and inversely correlated with grooming behavior. Compared to controls, AS increased immobility behavior and P-Ng and Ng levels in the hippocampus and prefrontal cortex. In AS animals, immobility behavior was positively correlated with the P-Ng in the prefrontal cortex. Thus, CS and AS produced opposing effects on Ng and P-Ng levels in the hippocampus and prefrontal cortex. Low Ng levels in the hippocampus were associated with anhedonic behavior in CS animals, whereas high P-Ng levels in the prefrontal cortex were associated with anxiety-like behavior in AS animals. Thus, Ng dysfunction might contribute to the neural mechanisms underlying stress-induced depression and anxiety.
On the Qing Tributary System from the Per-spective of Transaction Cost  [PDF]
Huanhuan Yu
Theoretical Economics Letters (TEL) , 2016, DOI: 10.4236/tel.2016.62025
Abstract: The Qing tributary system, which is centered on China, has been regarded as a universally acknowledged and distinguished regional order in pre-modern East Asian. This system is made up of a series of informal, formal institutions and the system of governance. Such system can get a good explanation by using the transaction cost theory of new institutional economics. It is obvious that the available literature about the tributary system rarely involves transaction cost theory; so this paper tries to analyze the Qing tributary system from this perspective and break the traditional analytical paradigm of international relations scholars, and then tries to build and sum up the two explainable models about the system of rising and recession.
Auditory BCI Research Using Spoken Digits Stimulation and Dynamic Stopping Criterion  [PDF]
Ying Zhang, Lei Wang, Miaomiao Guo, Lei Qu, Huanhuan Cui, Shuo Yang
Journal of Biomedical Science and Engineering (JBiSE) , 2016, DOI: 10.4236/jbise.2016.910B010
Auditory brain-computer interfaces (BCI) provide a method of non-muscular commu-nication and control for late-stage amyotrophic lateral sclerosis (ALS) patients, who have impaired eye movements or compromised vision. In this study, random sequences of spoken digits were presented as auditory stimulation. According the protocol, the subject should pay attention to target digits and ignore non-target digits. EEG data were recorded and the components of P300 and N200 were extracted as features for pattern recognition. Fisher classifier was designed and provided likelihood estimates for the Dynamic Stopping Criterion (DSC). Dynamic data collection was controlled by a threshold of the posterior probabilities which were continually updated with each additional measurement. In addition, the experiment would be stopped and the decision was made once the probabilities were above the threshold. The results showed that this paradigm could effectively evoke the characteristic EEG, and the DSC algorithm could improve the accuracy and communication rate.
Applications of Balanced Pairs
Huanhuan Li,Junfu Wang,Zhaoyong Huang
Mathematics , 2015,
Abstract: Let $(\mathscr{X}$, $\mathscr{Y})$ be a balanced pair in an abelian category. We first introduce the notion of cotorsion pairs relative to $(\mathscr{X}$, $\mathscr{Y})$, and then give some equivalent characterizations when a relative cotorsion pair is hereditary or perfect. We prove that if the $\mathscr{X}$-resolution dimension of $\mathscr{Y}$ (resp. $\mathscr{Y}$-coresolution dimension of $\mathscr{X}$) is finite, then the bounded homotopy category of $\mathscr{Y}$ (resp. $\mathscr{X}$) is contained in that of $\mathscr{X}$ (resp. $\mathscr{Y}$). As a consequence, we get that the right $\mathscr{X}$-singularity category coincides with the left $\mathscr{Y}$-singularity category if the $\mathscr{X}$-resolution dimension of $\mathscr{Y}$ and the $\mathscr{Y}$-coresolution dimension of $\mathscr{X}$ are finite.
Comparative Analysis of P2X1, P2X2, P2X3, and P2X4 Receptor Subunits in Rat Nodose Ganglion Neurons
Lizhao Wang, Dan Feng, Huanhuan Yan, Zhongping Wang, Lei Pei
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0096699
Abstract: Nodose ganglion (NG) neurons are visceral primary sensory neurons. The transmission and regulation of visceral sensation is mediated mainly by the P2X purinoceptor (P2X receptor). Although the characteristics of different P2X receptor subunits in the NG have been studied previously, comprehensive analyses have not been performed. In this study, we used immunohistochemistry, immunocytochemistry, and whole cell patch clamp techniques to compare the expression and function of P2X1, P2X2, P2X3, and P2X4 receptor subunits in adult rat NG neurons. Polyclonal antibodies against the four P2X subunits labeled different subpopulations of NG neurons. P2X1 and P2X3 were expressed mainly in small-to-medium sized NG neurons, whereas P2X2 and P2X4 were located mostly in medium- and larger-sized NG neurons. Over 36% of NG neurons were P2X3 positive, which was higher than the other three P2X subunits. In addition, different types of currents were recorded from neurons expressing different P2X subunits. The fast type of ATP current was recorded from neurons containing P2X1–4 subunits, the intermediate type of current was recorded from neurons containing the P2X1, P2X3, and P2X4 subunits, the slow type was recorded from neurons expressing P2X1–3, and/or P2X4 subunits, whereas the very slow type was recorded from neurons containing the P2X2 and P2X3 subunits. These comparative results provide an anatomical verification of the different subunits in NG neurons, and offer direct support for the idea that various functional NG populations have distinct responses to ATP, which might be in part due to the different expression profiles of diverse P2X subunits.
Fluorescent Properties of Hymecromone and Fluorimetric Analysis of Hymecromone in Compound Dantong Capsule
Huanhuan Zhi,Jingdan Wang,Shujing Wang,Yongju Wei
Journal of Spectroscopy , 2013, DOI: 10.1155/2013/147128
Abstract: Fluorescence spectra of hymecromone (4MU) aqueous solutions are investigated at different pHs. Two fluorescent species of 4MU, neutral molecular form and anion form, are considered to be the main fluorescent forms. Quantum yields of the two forms are measured to be 0.74 at pH 5.98 and 0.95 at pH 9.75, respectively. The ionization constant of 7-hydroxyl proton of 4MU is determined to be by a pH-fluorescence method. Addition of methanol into 4MU aqueous solution leads to a blue shift of maximum emission wavelength from 445?nm to 380?nm, and a decrease in fluorescence intensity. 3D fluorescence spectra of Chinese patent drug Compound Dantong Capsule (CDC) and its four component herbal drugs are also investigated. Based on their fluorescent properties, a novel fluorimetric method is proposed for the selective determination of 4MU in CDC without preseparation. The new method is suitable for the routine quality evaluation of CDC. 1. Introduction Coumarins, both natural and synthetic, are of interest because of their multiple biological and photodynamic activities. They are extensively used as medicine and analytical reagent [1–7]. Hymecromone (4-Methyl-7-hydroxycoumarin, 7-Hydroxy-4-methylcoumarin, 4-Methylumbelliferone, abbreviated as 4MU) is a synthetic coumarin compound. It is claimed that 4MU and its derivatives or metal complexes possess diverse pharmacological properties, such as antiviral [8], antifungal and antioxidative [9], anticancer [10–13], anticoagulant, and spasmolytic activities [14, 15]. The fluorescence of 4MU had been observed early [16], a water-soluble polymeric fluorescent probe for measurement of near-neutral pH was synthesized based on the fluorescent properties of 4MU [17], and the effect of pH on fluorescence was restudied recently [18]; however, no comprehensive and detailed fluorescence spectra and quantum yield have been found in the literature. Compound Dantong Capsule (CDC, also named Fufang Dantong Capsule) is a Chinese proprietary medicine [19]. It is effective in cure cholecystitis, cholangitis, intercurrent infection of gallbladder, and biliary tract concretion [19, 20]. The chemical composition of CDC includes 4MU (also named Dantong) and four kinds of Chinese herbal medicines, including Herba Isodonis Lophanthoidis (Xihuangcao), Herba Artemisiae Scopariae (Yinchen), Herba Andrographis (Chuanxinlian), and Rhei Radix et Rhizoma (Dahuang). The content of 4MU is one of the main quality indexes of CDC [21]. Earlier, the spectrophotometric method was applied for the determination of 4MU in CDC according to the absorbance of 4MU
An efficient and recyclable iron(III)-containing imidazolium salt catalyst for cross-coupling of aryl Grignard reagents with alkyl halides
ChunHui Yan,LinLin Wang,HuanHuan Gao,HongMei Sun,Qi Shen
Chinese Science Bulletin , 2012, DOI: 10.1007/s11434-011-4660-3
Abstract: 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, [DIPrim]Cl, was used to produce a novel iron(III)-containing imidazolium salt [DIPrim][FeCl4], which included a N,N-diarylimidazolium cation (R = 2,6-diisopropylphenyl), [DIPrim]+, and tetrachloroferrate(III) anion, [FeCl4] . This compound was an effective and easy-to-use catalyst for the cross-coupling of aryl Grignard reagents with primary and secondary alkyl halides bearing β-hydrogens. After simply decanting the cross-coupling product in the ether layer, [DIPrim][FeCl4] could be reused in at least four successive runs without significant loss of catalytic activity.
A Quantitative Assessment Approach to COTS Component Security
Jinfu Chen,Yansheng Lu,Huanhuan Wang,Chengying Mao
Mathematical Problems in Engineering , 2013, DOI: 10.1155/2013/165029
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