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Search Results: 1 - 10 of 9596 matches for " Jiqing Zeng "
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Molecular Hydrogen Is Involved in Phytohormone Signaling and Stress Responses in Plants
Jiqing Zeng, Mingyong Zhang, Xuejun Sun
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0071038
Abstract: Molecular hydrogen (H2) metabolism in bacteria and algae has been well studied from an industrial perspective because H2 is viewed as a potential future energy source. A number of clinical trials have recently reported that H2 is a therapeutic antioxidant and signaling molecule. Although H2 metabolism in higher plants was reported in some early studies, its biological effects remain unclear. In this report, the biological effects of H2 and its involvement in plant hormone signaling pathways and stress responses were determined. Antioxidant enzyme activity was found to be increased and the transcription of corresponding genes altered when the effects of H2 on the germination of mung bean seeds treated with phytohormones was investigated. In addition, upregulation of several phytohormone receptor genes and genes that encode a few key factors involved in plant signaling pathways was detected in rice seedlings treated with HW. The transcription of putative rice hydrogenase genes, hydrogenase activity, and endogenous H2 production were also determined. H2 production was found to be induced by abscisic acid, ethylene, and jasmonate acid, salt, and drought stress and was consistent with hydrogenase activity and the expression of putative hydrogenase genes in rice seedlings. Together, these results suggest that H2 may have an effect on rice stress tolerance by modulating the output of hormone signaling pathways.
MAP-based Audio Coding Compensation for Speaker Recognition  [PDF]
Tao Jiang, Jiqing Han
Journal of Signal and Information Processing (JSIP) , 2011, DOI: 10.4236/jsip.2011.23021
Abstract: The performance of the speaker recognition system declines when training and testing audio codecs are mismatched. In this paper, based on analyzing the effect of mismatched audio codecs in the linear prediction cepstrum coefficients, a method of MAP-based audio coding compensation for speaker recognition is proposed. The proposed method firstly sets a standard codec as a reference and trains the speaker models in this codec format, then learns the deviation distributions between the standard codec format and the other ones, next gets the current bias via using a small number adaptive data and the MAP-based adaptive technique, and then adjusts the model parameters by the type of coming audio codec format and its related bias. During the test, the features of the coming speaker are used to match with the adjusted model. The experimental result shows that the accuracy reached 82.4% with just one second adaptive data, which is higher 5.5% than that in the baseline system.
Evolutionary expansion and functional diversification of oligopeptide transporter gene family in rice
Tao Liu, Jiqing Zeng, Kuaifei Xia, Tian Fan, Yuge Li, Yaqin Wang, Mingyong Zhang
Rice , 2012, DOI: 10.1186/1939-8433-5-12
Abstract: A total of sixteen OsOPT genes (Os for Oryza sative L.) were identified in the rice genome, which were then classified into six sections that belong to two subfamilies (the PT and YSL subfamily). The major mechanisms for evolutionary expansion of the sixteen genes during the rice genome evolution include segmental and tandem duplication. Calculation of the duplication event dates indicated that the sixteen genes originated from nine original OsOPT genes, and the duplication events could be classified into three evolutionary stages. The first evolutionary stage occurred approximately 50 million years ago (Mya) and involved the evolution of four new genes. The second evolutionary stage was approximately 20 Mya and was marked by the appearance of two new genes, and the third evolutionary stage was approximately 9 Mya when two new genes evolved. Mining of the expression database and RT-PCR analysis indicated that the expression of most duplicated OsOPT genes showed high tissue specificities. Diverse expression patterns for the sixteen genes were evaluated using both semi-quantitative RT-PCR and the MPSS data. Expression levels of some OsOPT genes were regulated by abiotic and biotic stresses suggesting the potential involvement of these gene products in rice stress adaptation. Five OsOPT gene mutants showed abnormal development and growth, the primary analysis of five OsOPT gene mutants suggested that they may be necessary for rice development.These results suggested that rice-specific OsOPT genes might be potentially useful in improving rice.
Two Important Features of the 156 Deadliest Tropical Cyclones (1851-1996) in the North Atlantic  [PDF]
Bomin Chen, Jiqing Tan, Huiyi Fan
Atmospheric and Climate Sciences (ACS) , 2019, DOI: 10.4236/acs.2019.91005
Abstract: Damages and deaths due to a tropical cyclone (TC) can easily occur at three places belong to a TC: the small ring area (SRA) of maximum sustaining wind around TC eye, the large ring area (LRA) of the rotating wind field around SRA and the skin air belt (SKAB) around LRA. However, weather forecasters only use the intensity of the SRA of a TC as the proxy to gauge the whole TC intensity, which led to many “non-major” TCs proved to be “deadly” TCs. This is called as “over-generalization problem” (OGP). Here we introduce a new way to measure the intensity of a TC. After investigating 156 deadly TCs in North Atlantic, we found an important feature: 83.3% of the top 156 deadliest TCs usually made landfalls along “five major tracks”. Furthermore, we found that the new intensity of those “deadliest” TCs kept almost unchanged with the increasing of time intervals at earlier stage from the genesis points, whereas the new intensity of those “safe” TCs increased in a line with much steeper slope. Using these two features, weather forecasters can have two more options to identify those “non-major” and “deadly” TCs by SSHS in future.
Solvability of (k,n-k) conjugate boundary-value problems at resonance
Weihua Jiang,Jiqing Qiu
Electronic Journal of Differential Equations , 2012,
Abstract: Using the coincidence degree theory due to Mawhin and constructing suitable operators, we prove the existence of solutions for (k,n-k) conjugate boundary-value problems at resonance.
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”.
The Discovery of Atmosphere Cooling Engine  [PDF]
Lili Xu, Jiqing Tan, Yanjun Mao, Bomin Chen, Huiyi Fan
Atmospheric and Climate Sciences (ACS) , 2019, DOI: 10.4236/acs.2019.93019
Abstract: The earth-atmosphere system is an energy equilibrium system, including cooling and heating systems. The conception of “atmospheric heat engine (AH Engine)” was put forward very early in the research of heating processes. However, in the field of research on atmosphere cooling, there is no corresponding academic conception. Here we show how the atmosphere cooling engine (AC Engine) is discovered. The results show that there is a huge cooling center between the subtropical zone of northern hemispheres and the subtropical zone of southern hemispheres in the stratosphere, which is the result of AH engine. In the lower latitudes of the upper troposphere, there is an atmospheric heating belt that reaches directly to the surface of the ocean. In the global ocean surface, there are five heating centers and one cooling center, which are the results of Ocean Stabilization Machine (OSM). Therefore, there are 23 short-term global climate warming trends and 23 short-term global climate cooling trends of Global Mean Lan/Oceans Temperature Anomalies Index, which are actually the result of fluctuations of AH engine, AC engine and OSM, and how the mechanism works by AH engine, AC engine and OSM is also explained.
The Existence of Positive Solutions for Fractional Differential Equations with Sign Changing Nonlinearities
Weihua Jiang,Jiqing Qiu,Weiwei Guo
Abstract and Applied Analysis , 2012, DOI: 10.1155/2012/180672
Abstract: We investigate the existence of at least two positive solutions to eigenvalueproblems of fractional differential equations with sign changing nonlinearities in more generalizedboundary conditions. Our analysis relies on the Avery-Peterson fixed point theoremin a cone. Some examples are given for the illustration of main results.

Wang Jiqing,

环境科学学报 , 1996,
Abstract: Noise survey at primary and secondary schools in the cities of Shanghai and Nanjing revealed that trafficnoise is the most common and severe noise source intruding into the classroom. A recommended acceptable noise level can be determined from the teacheras response to the noise under investigation. Meanwhile, considering the teacher as speaker in an ordinary classroom, a similar acceptable noise level can also be determined from syllable articulation tests. As to the pupil, a series of psych-physical tests for pupil's behavior in the classroom have been conducted under different traffic noise levels at the range of 40 to 70 dBA. According to the results of t-test and single factor variance analysis, both significant differences between various articulation scores and the pupils' behavior in the classroom have been observed when the percentile exceeded sound levels either L50 exceeds 50 dBA or L10 exceeds 55 dBA.Conclusions drawn from these results strongly support the recommendation which we have made in our previous papers.
Stability of Impulsive Cohen-Grossberg Neural Networks with Time-Varying Delays and Reaction-Diffusion Terms
Jinhua Huang,Jiqing Liu,Guopeng Zhou
Abstract and Applied Analysis , 2013, DOI: 10.1155/2013/409758
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