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Search Results: 1 - 10 of 25588 matches for " Jingshu Dong "
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Impact of the Barents Sea SST in Autumn on the Winter Climate in Northeast China  [PDF]
Xiaomeng Shi, Yu Gu, Jilin Sun, Jingshu Dong, Min Geng
Journal of Geoscience and Environment Protection (GEP) , 2017, DOI: 10.4236/gep.2017.57009
Abstract: We studied effects of sea surface temperature anomaly (SSTA) in the Barents Sea in autumn on the atmospheric circulation in northeast China in winter, using the NCEP reanalysis data and sea surface temperature (SST) data of the Hadley Center. The results show that the ocean thermal conditions in the Barents Sea in autumn can be used as an important reference factor for predicting the cold air activity in China. When the sea surface temperature anomaly of the Barents Sea elevated in the autumn, the sea-level pressure anomaly elevated in eastern China on December, northeast China and southeastern Russia on January and February. In the years when the SSTA of the Barents Sea elevated in the autumn, the abnormal high-pressure ridge developed over Europe, and the geopotential height in western China appeared negative anomaly at 500 hPa. At 1000 hPa, the Mongolia high-pressure increased and the northerly airflow strengthened the cold high-latitude air broke out to the south, which was easy to affect northeast and north of China. In negative SSTA years, the high-pressure ridge was west to the north Atlantic, and the geopotential height in central and northern Siberia appeared negative anomaly at 500 hPa; the Mongolia high-pressure was weakened at 1000 hPa.
Prisoners' Dilemma Supergame on Rectangle Lattice  [PDF]
Zhongxing Ye, Jingshu Chen
Open Journal of Applied Sciences (OJAppS) , 2013, DOI: 10.4236/ojapps.2013.31B1002
Abstract:

In this paper a class of large supergames, i.e., infinitely repeated games played by many players are studied. The players located on the vertex set of planar rectangle lattice play several basic games with his neighbors. The basic game is two-person prisoners’ dilemma game with asymmetric payoffs. Under the conditions of the pre-specified updating rules and the transition probabilities, the relevant stochastic process of strategy evolution forms a Markovian process. The simulation results about the long-run behavior are provided.

Qualities Required for Civil Engineering Students from a Project Accident  [PDF]
Jingshu Zhang, Yuanlong Yang, Fangmeng Zheng
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.37B043
Abstract:

Civil engineering educational circles have always been focusing on the professional qualities and cultivation of civil engineering students, which is also problems in civil engineering teaching. In the beginning of professional course teaching, the author introduced an real project accident and specially emphasized that responsibility, teamwork, seriousness, carefulness, comprehensively applying of knowledge, working in accordance with codes are considered as quality requirements of civil engineering students. This teaching thought is carried out through the whole teaching process, which brings deep impression to students and good teaching effect. The teaching thought is introduced in this paper.

Admissibility in Partial Conjunction Testing
Jingshu Wang,Art B. Owen
Statistics , 2015,
Abstract: Admissibility of meta-analysis has been well understood since Allan Birnbaum's work in the 1950s. Any valid combined p-value obeying a monotonicity constraint is optimal at some alternative and hence admissible. In an exponential family context, the admissible tests reduce to those with a convex acceptance region. The partial conjunction null hypothesis is that at most r - 1 of n independent component hypotheses are non-null with r = 1 corresponding to a usual meta-analysis. Benjamini and Heller (2008) provide a valid test for this null by ignoring the r - 1 smallest p-values and applying a valid meta-analysis p-value to the remaining n - r + 1 p-values. We provide sufficient conditions for the admissibility of their test among monotone tests. A generalization of their test also provides admissible monotone tests and we show that admissible monotone tests are necessarily of that generalized form. If one does not require monotonicity then their test is no longer admissible, but the dominating tests are too unreasonable to be used in practice.
THE TRIGGERING EFFECT OF NEAR-EQUATORIAL CYCLONES ON EL NI?O

Gao Shiying,Wang Jingshu,Ding Yihui,

大气科学进展 , 1988,
Abstract: The relationship between tropical cyclones developing in the Northwest Pacific and El Ni?o is analysed and the triggering mechanism of the near-equatorial cyclones on El Ni?o is proposed. It is pointed out that the near-equalorial tropical cyclones developing equatorward of 10oN can intensify equatorial westerlies and produce Kelvin waves, which propagate to the South American Coasts in about 2-3 months, inducing SST to rise there. The near-equatoral cyclones play an essential role in El Ni?o. The beginning period of El Ni?o ranges from January to May. The number of near-equatorial cyclones developing in this period determines whether El Ni?o can be generated or not. The persistence period is from June to September. El Ni?o can not continue developing unless there are adequate near-equatorial cyclones. If there are not, the developed El Ni?o will be broken down. The period from October to December is called the developing period. During this period El Ni?o may approach its culmination only when adequate near-eqatorial cyclones have been developed east of 140oE, especially east of 160oE.
Optimization-based Alignment for Strapdown Inertial Navigation System Comparison and Extension
Lubin Chang,Jingshu Li,Kailong Li
Computer Science , 2014,
Abstract: In this paper, the optimization-based alignment (OBA) methods are investigated with main focus on the vector observations construction procedures for the strapdown inertial navigation system (SINS). The contributions of this study are twofold. First the OBA method is extended to be able to estimate the gyroscopes biases coupled with the attitude based on the construction process of the existing OBA methods. This extension transforms the initial alignment into an attitude estimation problem which can be solved using the nonlinear filtering algorithms. The second contribution is the comprehensive evaluation of the OBA methods and their extensions with different vector observations construction procedures in terms of convergent speed and steady-state estimate using field test data collected from different grades of SINS. This study is expected to facilitate the selection of appropriate OBA methods for different grade SINS.
Analyzing Conflict Freedom For Multi-threaded Programs With Time Annotations
Jingshu Chen,Marie Duflot,Stephan Merz
Computer Science , 2014,
Abstract: Avoiding access conflicts is a major challenge in the design of multi-threaded programs. In the context of real-time systems, the absence of conflicts can be guaranteed by ensuring that no two potentially conflicting accesses are ever scheduled concurrently.In this paper, we analyze programs that carry time annotations specifying the time for executing each statement. We propose a technique for verifying that a multi-threaded program with time annotations is free of access conflicts. In particular, we generate constraints that reflect the possible schedules for executing the program and the required properties. We then invoke an SMT solver in order to verify that no execution gives rise to concurrent conflicting accesses. Otherwise, we obtain a trace that exhibits the access conflict.
The Optimized Transport Scheme of Empty and Heavy Containers with Novel Genetic Algorithm
Lianwei Qu,Kang Chen,Bao Hongli,Jingshu Ma
Mathematical Problems in Engineering , 2013, DOI: 10.1155/2013/434125
Abstract:
Confounder Adjustment in Multiple Hypotheses Testing
Jingshu Wang,Qingyuan Zhao,Trevor Hastie,Art B. Owen
Statistics , 2015,
Abstract: We consider large-scale studies in which thousands of significance tests are performed simultaneously. In some of these studies, the multiple testing procedure can be severely biased by latent confounding factors such as batch effects and unmeasured covariates that correlate with both primary variable(s) of interest (e.g. treatment variable, phenotype) and the outcome. Over the past decade, many statistical methods have been proposed to adjust for the confounders in hypothesis testing. We unify these methods in the same framework, generalize them to include multiple primary variables and multiple nuisance variables, and analyze their statistical properties. In particular, we provide theoretical guarantees for RUV-4 (Gagnon-Bartsch et al., 2013) and LEAPP (Sun et al., 2012), which correspond to two different identification conditions in the framework: the first requires a set of "negative controls" that are known a priori to follow the null distribution; the second requires the true non-nulls to be sparse. Two different estimators which are based on RUV-4 and LEAPP are then applied to these two scenarios. We show that if the confounding factors are strong, the resulting estimators can be asymptotically as powerful as the oracle estimator which observes the latent confounding factors. For hypothesis testing, we show the asymptotic z-tests based on the estimators can control the type I error. Numerical experiments show that the false discovery rate is also controlled by the Benjamini-Hochberg procedure when the sample size is reasonably large.
Quercetin Suppresses Cyclooxygenase-2 Expression and Angiogenesis through Inactivation of P300 Signaling
Xiangsheng Xiao,Dingbo Shi,Liqun Liu,Jingshu Wang,Xiaoming Xie,Tiebang Kang,Wuguo Deng
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0022934
Abstract: Quercetin, a polyphenolic bioflavonoid, possesses multiple pharmacological actions including anti-inflammatory and antitumor properties. However, the precise action mechanisms of quercetin remain unclear. Here, we reported the regulatory actions of quercetin on cyclooxygenase-2 (COX-2), an important mediator in inflammation and tumor promotion, and revealed the underlying mechanisms. Quercetin significantly suppressed COX-2 mRNA and protein expression and prostaglandin (PG) E(2) production, as well as COX-2 promoter activation in breast cancer cells. Quercetin also significantly inhibited COX-2-mediated angiogenesis in human endothelial cells in a dose-dependent manner. The in vitro streptavidin-agarose pulldown assay and in vivo chromatin immunoprecipitation assay showed that quercetin considerably inhibited the binding of the transactivators CREB2, C-Jun, C/EBPβ and NF-κB and blocked the recruitment of the coactivator p300 to COX-2 promoter. Moreover, quercetin effectively inhibited p300 histone acetyltransferase (HAT) activity, thereby attenuating the p300-mediated acetylation of NF-κB. Treatment of cells with p300 HAT inhibitor roscovitine was as effective as quercetin at inhibiting p300 HAT activity. Addition of quercetin to roscovitine-treated cells did not change the roscovitine-induced inhibition of p300 HAT activity. Conversely, gene delivery of constitutively active p300 significantly reversed the quercetin-mediated inhibition of endogenous HAT activity. These results indicate that quercetin suppresses COX-2 expression by inhibiting the p300 signaling and blocking the binding of multiple transactivators to COX-2 promoter. Our findings therefore reveal a novel mechanism of action of quercetin and suggest a potential use for quercetin in the treatment of COX-2-mediated diseases such as breast cancers.
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