Friendship Influence on Mobile Behavior of Location Based Social Network Users

Yang Song,Zheng Hu,Xiaoming Leng,Hui Tian,Kun Yang,Xin Ke 한국통신학회 2015 Journal of communications and networks Vol.17 No.2

In mobile computing research area, it is highly desirable to understand the characteristics of user movement so that the user friendly location aware services could be rendered effectively. Location based social networks (LBSNs) have flourished recently and are of great potential for movement behavior exploration and datadriven application design. While there have been some efforts on user check-in movement behavior in LBSNs, they lack comprehensive analysis of social influence on them. To this end, the socialspatial influence and social-temporal influence are analyzed synthetically in this paper based on the related information exposed in LBSNs. The check-in movement behaviors of users are found to be affected by their social friendships both from spatial and temporal dimensions. Furthermore, a probabilistic model of user mobile behavior is proposed, incorporating the comprehensive social influence model with extent personal preference model. The experimental results validate that our proposed model can improve prediction accuracy compared to the state-of-the-art social historical model considering temporal information (SHM+T), which mainly studies the temporal cyclic patterns and uses them to model user mobility, while being with affordable complexity.

Predominant expression of exon 7 skipped SMN mRNAs in lung based on analysis of transcriptome sequencing datasets

Yang, Xiaoming,Shen, Haihong,Gao, Xue,Zheng, Xuexiu,Qin, Ryan,Zhou, Jianhua Springer-Verlag 2014 NEUROLOGICAL SCIENCES Vol.35 No.3

Adsorption-coupled reduction of bromate by Fe(II)–Al(III) layered double hydroxide in fixed-bed column: Experimental and breakthrough curves analysis

Qi Yang,Yu Zhong,Xiaoming Li,Xin Li,Kun Luo,Xiuqiong Wu,Hongbo Chen,Yang Liu,Guangming Zeng 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.28 No.-

In this study, the bromate removal was investigated in continuous fixed-bed column using Fe(II)–Al(III)layered double hydroxide (LDH). With increase of column bed depth from 1.0 to 3.0 cm, breakpoint time(tb) increased from 51 to 175 h while throughput volume raised from 12.24 to 42.00 L at breakthroughpoint. The bromate removal was attributed to the reduction of Fe(II) present in LDH. The breakthroughcurve was simulated well by Thomas model, but BDST model was the only effective to initial part(1–10%). The maximum removal capacity (N0) calculated by Thomas model reached 71.01 mmol/g atflow rate (3 mL/min).

ANTECEDENTS OF THE PERCEIVED EMOTIONAL COST OF SWITCHING: EVIDENCE FROM THE JAPANESE TABLET MARKET

Sumita Sarma,Mark E. Parry,Xiaoming Yang 글로벌지식마케팅경영학회 2016 Global Marketing Conference Vol.2016 No.7

Existing studies of Japanese consumers have emphasized the importance of collectivism and risk aversion in Japanese culture. In this paper we examine the relationship between these constructs in new product adoption decisions that involve brand switching. We argue that, for Japanese consumers, the perceived emotional risk of adoption is related to (1) the degree to which a consumer identifies with the brand of his or her current product and (2) the perceived performance, financial, and social risks of switching to an alternative product. We further hypothesize that perceived social risk is positively related to brand identification, perceived performance risk, and perceived financial risk. Finally, we hypothesize that financial risk is positively related to performance risk. We test our hypotheses using data collected in Japan in June 2015. Questionnaire items were adapted from existing, well-validated scales. The Japanese version of the questionnaire was developed by using the standard double translation procedure. The Japanese version of the questionnaire was administered by a marketing research firm to a national panel of respondents stratified by age and gender. The resulting sample consisted of 518 iPad owners from across Japan, of whom approximately half were men. Within each gender category, approximately half of the respondents intended to purchase a new tablet within the next 12 months. Following established SEM procedures, we began by estimating a confirmatory factory analysis model, after which we estimated a structural equation model. In each case, the estimated model satisfied standard evaluation criteria. In general, our findings provide support for the hypothesized model. First, Perceived Performance Risk was positively related with Financial Risk, Social Risk, and Emotional Risk. Second, Financial Risk was positively related with Social Risk. Third, Social Risk was positively related with Emotional Risk. Fourth, Brand Identification was positively related with Social Risk and Emotional Risk. The one hypothesized linkage that was not supported was the relationship between Financial Risk and Emotional Risk. A comparison of coefficient magnitudes reveals several important findings. First, in the Social Risk equation, the coefficient of Performance Risk is significantly larger than the Brand Identification coefficient. Second, within the Emotional Risk equation, the coefficient of Performance Risk is significantly larger than the coefficients of Brand Identification and Financial Risk. Similarly, the coefficient of Social Risk is also significantly larger than the coefficients of Financial Risk and Social Risk.

Lack of Association Between the Matrix Metalloproteinase-2 -1306C>T Polymorphism and Breast Cancer Susceptibility: a Meta-analysis

Yang, Lu,Li, Ning,Wang, Siyu,Kong, Yanan,Tang, Hailin,Xie, Xinhua,Xie, Xiaoming Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.12

Background: Since inconsistent results have been reported regarding the relation between the matrix metalloproteinase-2 (MMP-2) -1306C>T polymorphism and susceptibility for breast cancer, we performed a meta-analysis to investigate the issue. Materials and Methods: An internet search of PubMed and EMBASE was performed to identify eligible studies. Pooled odds ratios (ORs) with their corresponding confidence intervals (CIs) were calculated to evaluate any association between MMP-2 -1306C>T polymorphism and breast cancer susceptibility. Results: Nine case-control studies were included in the meta-analysis, involving 9,858 cases and 10,871 controls. Overall, there was no evidence of any association between the MMP-2 -1306C>T polymorphism and breast cancer susceptibility in different genetic models (T-allele vs C-allele: OR=0.95, 95%CI, 0.82-1.10, p=0.49; TT vs CC: OR=1.03, 95%CI, 0.90-1.19, p=0.66; TT+TC vs CC: OR=0.93, 95%CI, 0.78-1.10, p=0.38; TT vs TC+CC: OR=1.02, 95%CI, 0.89-1.17, p=0.77). In the subgroup analysis by ethnicity, CC was associated with a significant increase in breast susceptibility among Latin-Americans in the dominant model (OR=0.61, 95%CI, 0.40-0.93, p=0.02), but the association disappeared in other models. No significant association was observed among Europeans, East Asians and others in different genetic models. In the subgroup analysis by their source of controls, no significant association between MMP-2 -1306C>T polymorphism and breast cancer susceptibility was noted among population-based studies and hospital-based studies in different genetic models. Conclusions: The results of this meta-analysis suggest that MMP-2 -1306C>T polymorphism is not associated with breast cancer susceptibility, although the association among Latin-Americans in the dominant model was significant.

Nanophase ZnV2O4 as stable and high capacity Li insertion electrode for Li-ion battery

Xiaoming Zhu,Xiaoyu Jiang,Lifen Xiao,Xinping Ai,Hanxi Yang,Yuliang Cao 한국물리학회 2015 Current Applied Physics Vol.15 No.4

Spinel ZnV2O4 nanoparticles are synthesized by a hydrothermal method and its properties are characterized using XRD, SEM, TEM, and electrochemical test. The structural and morphological characterizations show that ZnV2O4 sample has high purity and well crystallization with crystal size less than 20 nm. The as prepared electrode shows stable capacity over 660 mAh g-1 in the voltage range of 0.01-3.0 V at 50 mA g-1. The reaction mechanism with lithium ion is also investigated through ex-XRD and -TEM. It shows that the pristine ZnV2O4 is transformed to isostructural spinel LixV2O4 (x close to 7.6) and metal Zn phase during the first lithiation process. Then the spinel LixV2O4 seems to perform a topotactic intercalation reaction mechanism and that the in-situ formed LixV2O4 can still keep its spinel matrix while allowing more than 5.7 lithium reversibly into/out over 50 cycles.

Electrochemical properties of stacked-nanoflake Li4Ti5O12 spinel synthesized by a polymer-pyrolysis method

Xiaoming Zhu,Xiaoyu Jiang,Haiyan Lu,Xinping Ai,Hanxi Yang,Yuliang Cao 한국물리학회 2014 Current Applied Physics Vol.14 No.4

Stacked-nanoflake Li4Ti5O12 spinel was synthesized via the pyrolysis of a LieTi copolymeric precursor formed by in situ polymerization of LiOH and [Ti(OC4H9)4] and acrylic acid. XRD and SEM characterization shows that the powders calcined at 700 C for 3 h was well-crystallized particles with submicron diameter. Chargeedischarge measurement showed the Li4Ti5O12 electrode had displayed excellent rate capability and delivered reversible capacity of 171, 158, 148, 138 and 99 mAh g1 at rates of 0.1C, 0.5C, 1C, 2C and 4C, respectively. The test electrode also showed excellent cyclability as the capacity retains 96.1% after 60 cycles between 0.5 and 2.5 V.

Individual DC Voltage Balancing Method at Zero Current Mode for Cascaded H-bridge Based Static Synchronous Compensator

Yang, Zezhou,Sun, Jianjun,Li, Shangsheng,Liao, Zhiqiang,Zha, Xiaoming The Korean Institute of Electrical Engineers 2018 Journal of Electrical Engineering & Technology Vol.13 No.1

Individual DC voltage balance problem is an inherent issue for cascaded H-bridge (CHB) based converter. When the CHB-based static synchronous compensator (STATCOM) is operating at zero current mode, the software-based individual DC voltage balancing control techniques may not work because of the infinitesimal output current. However, the different power losses of each cell would lead to the individual DC voltages unbalance. The uneven power losses on the local supplied cell-controllers (including the control circuit and drive circuit) would especially cause the divergence of individual DC voltages, due to their characteristic as constant power loads. To solve this problem, this paper proposes an adaptive voltage balancing module which is designed in the cell-controller board with small size and low cost circuits. It is controlled to make the power loss of the cell a constant resistance load, thus the DC voltages are balanced in zero current mode. Field test in a 10kV STATCOM confirms the performance of the proposed method.

Compact Band-notched UWB Antenna Design Based On Transmission Line Model

Xiaoming Zhu,Xiaodong Yang,Peng Chen 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.1

In order to avoid the interference from existing narrowband communication systems, this paper proposes a compact band-notched UWB (ultra wideband) antenna with size of 12mm×22mm ×1.6mm. Transmission line model is applied to analyzing wide impedance matching characteristic of the modified base antenna, which has a gradual stepped impedance feeder structure. The proposed antenna realizes dual band-notched function by combining two biased T-shaped parasitic elements on the rear side with a window aperture on the radiation patch. The simulation current distributions of the antenna reflect resonant suppression validity of the two methods. In addition, the measured radiation characteristics demonstrate the proposed antenna prevents signal interference from WLAN (5.15-5.825GHz) and WiMAX (3.4-3.69GHz) effectively, and the measured patterns show the antenna omnidirectional radiation in working frequencies.

A Novel Non-contact Measurement Method for the Detection of Current Flowing Through Concealed Conductors

Yang Fan,Liu Kai,Zhu Liwei,Hu Jiayuan,Wang Xiaoyu,Shen Xiaoming,Luo Hanwu,Ammad Jadoon 한국자기학회 2017 Journal of Magnetics Vol.22 No.1

In order to detect the current flowing through concealed conductor, this paper proposes a new method based on derivative method. Firstly, this paper analyzes the main peak characteristic of the derivative function of magnetic field generated by a current-carrying conductor, and a relationship between the current flowing through the conductor and the main peak of the derivative function is obtained and applied to calculate the current. Then, the method is applied to detect the conductor current flowing through grounding grids of substations. Finally, the numerical experimental and field experiment verified the feasibility and accuracy of the method, and the computing results show that the method can effectively measure the conductor current of grounding grids with low error, and the error is within 5 %.