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| 1 | Methylesterification of cell-wall pectin controls the diurnal flower-opening times in rice显示文摘Flowers are the core reproductive organ of plants, and flowering is essential for cross-pollination. Diurnal flower-opening time is thus a key trait influencing reproductive isolation, hybrid breeding, and thermostability in plants. However, the molecular mechanisms controlling this trait remain unknown. Here, we report that rice Diurnal Flower Opening Time 1 (DFOT1) modulates pectin methylesterase (PME) activity to regulate pectin methylesterification levels of the lodicule cell walls, which affect lodicule swelling to control diurnal flower-opening time. DFOT1 is specifically expressed in the lodicules, and its expression gradually increases with the approach to flowering but decreases with flowering. Importantly, a knockout of DFOT1 showed earlier diurnal flower opening. We demonstrate that DFOT1 interacts directly with multiple PMEs to promote their activity. Knockout of PME40 also resulted in early diurnal flower opening, whereas overexpression of PME42 delayed diurnal flower opening. Lower PME activity was observed to be associated with higher levels of pectin methylesterification and the softening of cell walls in lodicules, which contribute to the absorption of water by lodicules and cause them to swell, thus promoting early diurnal flower opening. Higher PME activity had the opposite effect. Collectively, our work uncovers a molecular mechanism underlying the regulation of diurnal flower-opening time in rice, which would help reduce the costs of hybrid breeding and improve the heat tolerance of flowering plants by avoiding higher temperatures at anthesis. | Mumei Wang Xiaopei Zhu Guoqing Peng Minglong Liu Shuqing Zhang Minghao Chen Shitang Liao Xiaoying Wei Peng Xu Xiyu Tan Fangping Li Zhichuan Li Li Deng Ziliang Luo Liya Zhu Shuai Zhao Dagang Jiang Jing Li Zhenlan Liu Xianrong Xie Shaokui Wang Aimin Wu Chuxiong Zhuang Hai Zhou | 2022 | Molecular Plant2022，15，6： | 2 |
| 2 | COLLABORATIVE TRACKING VIA PARTICLE FILTER IN WIRELESS SENSOR NETWORKS显示文摘Target tracking is one of the main applications of wireless sensor networks. Optimized computation and energy dissipation are critical requirements to save the limited resource of the sensor nodes. A framework and analysis for collaborative tracking via particle filter are presented in this paper. Collaborative tracking is implemented through sensor selection, and results of tracking are propagated among sensor nodes. In order to save communication resources, a new Gaussian sum particle filter, called Gaussian sum quasi particle filter, to perform the target tracking is presented, in which only mean and covariance of mixands need to be communicated. Based on the Gaussian sum quasi particle filter, a sensor selection criterion is proposed, which is computationally much simpler than other sensor selection criterions. Simulation results show that the proposed method works well for target tracking. | Yan Zhenya Zheng Baoyu Xu Li Li Shitang | 2008 | Journal of Electronics(China)2008，25，3： | 2 |
| 3 | Recent improvements of actuator line-large-eddy simulation method for wind turbine wakes显示文摘In a large wind farm,the wakes of upstream and downstream wind turbines can interfere with each other,affecting the overall power output of the wind farm.To further improve the numerical accuracy of the turbine wake dynamics under atmosphere turbulence,this work proposes some improvements to the actuator line-large-eddy simulation(AL-LES)method.Based on the dynamic k-equation large-eddy simulation(LES),this method uses a precursor method to generate atmospheric inflow turbulence,models the tower and nacelle wakes,and improves the body force projection method based on an anisotropic Gaussian distribution function.For these three improvements,three wind tunnel experiments are used to validate the numerical accuracy of this method.The results show that the numerical results calculated in the far-wake region can reflect the characteristics of typical onshore and offshore wind conditions compared with the experimental results.After modeling the tower and nacelle wakes,the wake velocity distribution is consistent with the experimental result.The radial migration velocity of the tip vortex calculated by the improved blade body force distribution model is 0.32 m/s,which is about 6%different from the experimental value and improves the prediction accuracy of the tip vortex radial movement.The method proposed in this paper is very helpful for wind turbine wake dynamic analysis and wind farm power prediction. | Zhiteng GAO Ye LI Tongguang WANG Shitang KE Deshun LI | 2021 | Applied Mathematics and Mechanics(English Edition)2021，42，4： | 2 |
| 4 | Enhanced sensitivity of SAW gas sensor based on high frequency stability oscillator显示文摘 | Wang Wen He Shitang Li Shunzhou el al | 2006 | IEEE Sensors2006，，6： | 1 |
| 5 | Enhanced sensitivity of saw gas sensor coated molecularly imprinted polymer incorporating high frequency stability oscillator显示文摘 | Wang Wen He Shitang Li Shunzhou | 2007 | Sensors and Actuators B2007，125，2： | 1 |
| 6 | Finite difference time domain analysis of two-dimensional surface acoustic wave piezoelectric phononic crystals at radio frequency显示文摘The finite-dmerence time-domam(FDTD)method is proposed for analyzing the surface acoustic wave(SAW)propagation in two-dimensional(2D)piezoelectric phononic crystals(PCs)at radio frequency(RF),and also experiments are estabhshed to demonstrate its analysis result of the PCs'band gaps.The FDTD method takes the piezoelectric effect of PCs into account,in which periodic boundary conditions are used to decrease memory/time consumption and the perfectly matched layer boundary conditions are adopted as the SAW absorbers to attenuate artificial reflections.Two SAW delay lines are estabhshed with/without piezoelectric PCs located between interdigital transducers.By removing several echoes with window gating function in time domain,delay lines transmission function is achieved.The PCs'transmission functions and band gaps are obtained by comparing them in these two delay lines.When Aluminum/128°YX-LiNbO_3 is adopted as scatter and substrate material,the PCs'band gap is calculated by this FDTD method and COMSOL respectively.Results show that computational results of FDTD agree well with experimental results and are better than that of COMSOL. | TIAN Yahui LI Honglang KE Yabing LUO Wei WEI Jiangbo HE Shitang | 2015 | Chinese Journal of Acoustics2015，34，3： | 1 |
| 7 | High frequency stability oscillator forsurface acoustic wave-based gas sensor 显示文摘 | Wang Wen He Shitang Li Shunzhou | 2006 | Smart Mater Struct2006，，15： | 1 |
| 8 | Some new extremal self-dual codes with lengths 42,44,52 and 58显示文摘 | LI Shitang | 2001 | Discrete Mathematics2001，238，： | 1 |
| 9 | Ag_(2)CO_(3)-catalyzed efficient synthesis of internal or terminal propargylicamines and chalcones via A^(3)-coupling under solvent-free condition显示文摘Several simple, fast and practical protocols have been developed to synthesize internal or terminal propargylamines and chalcones via A^(3)-coupling reaction of aldehydes, amines, and alkynes catalyzed by an easily available catalyst Ag_(2)CO_(3)under solvent-free condition. The reaction proceeded smoothly to deliver various products in good-to-excellent yields with good functional group tolerance. Gram-scale preparation, bioactive molecule synthesis and asymmetric substrates have been demonstrated. Furthermore,plausible mechanisms for the synthesis of different products have been proposed. | Ningbo Li Shitang Xu Xueyan Wang Li Xu Jie Qiao Zhiwu Liang Xinhua Xu | 2021 | Chinese Chemical Letters2021，32，12： | 0 |
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