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Search Results: 1 - 10 of 6788 matches for " Yanjun Mao "
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The “Ocean Stabilization Machine” May Represent a Primary Factor Underlying the Effect of “Global Warming on Climate Change”  [PDF]
Yanjun Mao, Jiqing Tan, Bomin Chen, Huiyi Fan
Atmospheric and Climate Sciences (ACS) , 2019, DOI: 10.4236/acs.2019.91009
Abstract: Contemporary references to global warming pertain to the dramatic increase in monthly global land surface temperature (GLST) anomalies since 1976. In this paper, we argue that recent global warming is primarily a result of natural causes; we have established three steps that support this viewpoint. The first is to identify periodic functions that perfectly match all of the monthly anomaly data for GLST; the second is to identify monthly sea surface temperature (SST) anomalies that are located within different ocean basin domains and highly correlated with the monthly GLST anomalies; and the third is to determine whether the dramatically increasing (or dramatically decreasing) K-line diagram signals that coincide with GLST anomalies occurred in El Niño years (or La Niña years). We have identified 15,295 periodic functions that perfectly fit the monthly GLST anomalies from 1880 to 2013 and show that the monthly SST anomalies in six domains in different oceans are highly correlated with the monthly GLST anomalies. In addition, most of the annual dramatically increasing GLST anomalies occur in El Niño years; and most of the annual dramatically decreasing GLST anomalies occur in La Niña years. These findings indicate that the “ocean stabilization machine” might represent a primary factor underlying the effect of “global warming on climate change”.
Joint Detection for Image Transmission Based on Schur Algorithm over Wireless Sensor Network  [PDF]
Yanjun HU
Communications and Network (CN) , 2009, DOI: 10.4236/cn.2009.12014
Abstract: To achieve much efficient multimedia transmission over an error-prone wireless network, there are still some problem must to be solved, especially in energy limited wireless sensor network. In this paper, we propose a joint detection based on Schur Algorithm for image wireless transmission over wireless sensor network. To eliminate error transmissions and save transmission energy, we combine Schur algorithm with joint dynamic detection for wireless transmission of JPEG 2000 encoded image which we proposed in [1]. Schur algorithm is used to computing the decomposition of system matrix to decrease the computational complexity. We de-scribe our transmission protocol, and report on its performance evaluation using a simulation testbed we have designed for this purpose. Our results clearly indicate that our method could approach efficient images transmission in wireless sensor network and the transmission errors are significantly reduced when compared to regular transmissions.
Study of 1998 Heavy Rainfall over the Yangtze River Basin Using TRMM Data

Cheng Minghu,He Huizhong,Mao Dongyan,Qi Yanjun,Cui Zhehu,Zhou Fengxian,
Cheng Minghu
,He Huizhong,Mao Dongyan,Qi Yanjun,Cui Zhehu,Zhou Fengxian

大气科学进展 , 2001,
Abstract: TRMM (Tropical Rainfall Measuring Mission) data have been made available to the public users since June 1998. In this paper, some preliminary research is reported for the case study of heavy rainfall over the Yangtze River Basin using TRMM data at 2140 UTC 20 July 1998. TRMM derived precipitation products are also compared with rain gauge observation, ground radar data and numerical model simulation results.It is shown that TRMM data can be easily used to monitor the heavy rainfall and have many applications.
Exponential Attractors of the Nonclassical Diffusion Equations with Lower Regular Forcing Term  [PDF]
Yanjun Zhang, Qiaozhen Ma
International Journal of Modern Nonlinear Theory and Application (IJMNTA) , 2014, DOI: 10.4236/ijmnta.2014.31003

In this article, we prove the existence of exponential attractors of the nonclassical diffusion equation with critical nonlinearity and lower regular forcing term. As an additional product, we show that the fractal dimension of the global attractors of this problem is finite.

Characterization of the Complete Genome of Chikungunya in Zhejiang, China, Using a Modified Virus Discovery Method Based on cDNA-AFLP
Yi Sun, JuYing Yan, HaiYan Mao, Lei Zhang, QinFeng Lyu, ZhongHua Wu, Wei Zheng, Cen Feng, YanJun Zhang
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0083014
Abstract: Background Chikungunya (CHIK) virus is a mosquito-borne emerging pathogen presenting great health challenges worldwide, particularly in tropical zones. Here we report a newly detected strain of CHIK, Zhejiang/chik-sy/2012, in China, a nonindigenous region for CHIK, using a modified approach based on the classic cDNA-AFLP. We then performed etiological and phylogenetic analyses to better understand its molecular characterization and phylogenetic pattern, and also to aid in further evaluating its persistence in Southeast Asia. Methods By using this modified procedure, we determined for the first time the complete genome sequence of the chikungunya virus strain, Zhejiang/chik-sy/2012, isolated in 2012 from a patient in Zhejiang, China. Sequence analyses revealed that this positive single strand of RNA is 12,017 bp long. We found no single amino acid mutation in A226V, D284E and A316V. Phylogenetic analysis showed that our strain shared the greatest homology with a strain isolated in Taiwan, which was derived from a strain from Indonesia. Chik-sy/2012 is in a different clade from other CHIK viruses found in China previously. Conclusions A modified cDNA-AFLP in virus discovery was used to isolate the first CHIK and the first complete genome sequence of virus strain chik-sy/2012 in 2012 from a patient with CHIK fever in Zhejiang, China. The infection displayed great phylogenetic distance from viruses detected in Guangdong, China, in 2008 and 2010, since they were derived from another evolutionary lineage. Additional molecular epidemiology data are needed to further understand, monitor and evaluate CHIK in China.
Are We Ready? A Case Study of Technology-enhanced, Collaborative Language Learning
YanJun Wang
Lecture Notes in Engineering and Computer Science , 2007,
Search for High-Mass Resonances Decaying into Leptons of Different Flavor ($eμ$, $eτ$, $μτ$)
Yanjun Tu
Physics , 2008,
Abstract: We present a search for high-mass resonances decaying into two leptons of different flavor: $e\mu$, $e\tau$ and $\mu\tau$. These resonances are predicted by several models for Physics Beyond the Standard Model, such as R-parity-violating MSSM. The search is based on 1 ${\rm fb^{-1}}$ of Tevatron Run II data collected with the CDF detector at $\sqrt{s}$ = 1.96 TeV in proton anti-proton collisions.
Changes in Natural Mortality of Atlantic Cod(Gadus morhua) on Eastern Georges Bank Changes in Natural Mortality of Atlantic Cod(Gadus morhua) on Eastern Georges Bank
WANG Yanjun
- , 2016,
Abstract: The assessment of Eastern Georges Bank cod with the assumption of a constant natural mortality of 0.2 has over-estimated stock productivity, resulting in a severe retrospective pattern since the late 2000 s. Comparing relative exploitation rate(ratio of fishery catch at age to survey abundance indices at age) with total mortality calculated from the age distribution in surveys indicated a conflict when constant natural mortality was assumed. This inconsistency implies an increase in natural mortality since the mid-1990 s. In this paper, natural mortality estimated by Virtual Population Analysis(VPA) indicated that natural mortality for this stock has increased to 0.8 since the mid-1990 s for ages 6+. Potential factors contributing to this elevated natural mortality, including poor fish conditions and increased losses due to seal predation were discussed
Cancer mortality in a Chinese population surrounding a multi-metal sulphide mine in Guangdong province: an ecologic study
Mao Wang, Hong Song, Wei-Qing Chen, Ciyong Lu, Qianshen Hu, Zefang Ren, Yan Yang, Yanjun Xu, Aiming Zhong, Wenhua Ling
BMC Public Health , 2011, DOI: 10.1186/1471-2458-11-319
Abstract: An ecologic study was performed. Between 2000-2007, a total population of 194,131 lived in the nine agricultural villages that surround the Hengshihe area. Heavy metals concentrations were determined in local environmental samples (water and crops) and whole blood taken from 1152 local residents of both a high-exposure area (HEA) and a low-exposure area (LEA). We calculated the rate ratio and standardized mortality ratios based on age- and gender-specific cancer mortality rates for the different reference populations (based on district, county and province). Simple, multiple linear and ridge regression models were used to evaluate the associations between exposure to multiple heavy metals and cancer mortality in the nine villages, after adjustment for age and sex.The geometric mean blood levels of cadmium and lead were measured at 24.10 μg/L and 38.91 μg/dL for subjects (n = 563) in the HEA and 1.87 μg/L and 4.46 μg/dL for subjects (n = 589) from the LEA, respectively (P < 0.001). The rate of mortality from all cancers in the HEA was substantially elevated in comparison with the corresponding mortality rate in the LEA for men (rate ratio = 2.13; 95% confidence intervals = 1.63 - 2.77) and women (2.83; 1.91 - 4.19); rates were also significantly elevated compared with the rate when compared to the entire Wengyuan County area, or the provincial reference population. In addition, mortality rates were significantly increased for stomach, lung and esophageal cancer in the HEA in comparison with the corresponding rates in the LEA, in Wengyuan County and the provincial reference population for men, women and both combined. Further analysis showed that there were significantly positive correlations between exposure to cadmium and lead and the risk of all-cancers and stomach cancer mortality among women and both sexes, whilst zinc exposure showed no association with the risk of site-specific cancer mortality in the nine villages evaluated.The findings of this study reveal pr
Flocking Control of a Group of Agents Using a Fuzzy-Logic-Based Attractive/Repulsive Function  [PDF]
Hui Yu, Jigui Jian, Yanjun Shen
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2010, DOI: 10.4236/ijcns.2010.36076
Abstract: In this study, a novel procedure is presented for control and analysis of a group of autonomous agents with point mass dynamics achieving flocking motion by using a fuzzy-logic-based attractive/repulsive function. Two cooperative control laws are proposed for a group of autonomous agents to achieve flocking formations related to two different centers (mass center and geometric center) of the flock. The first one is designed for flocking motion guided at mass center and the other for geometric center. A virtual agent is introduced to represent a group objective for tracking purposes. Smooth graph Laplacian is introduced to overcome the difficulties in theoretical analysis. A new fuzzy-logic-based attractive/repulsive function is proposed for separation and cohesion control among agents. The theoretical results are presented to indicate the stability (separation, collision avoidance and velocity matching) of the control systems. Finally, simulation example is demonstrated to validate the theoretical results.
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