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| 1 | Theoretical and experimental study on strip reflection coefficient of different crystal symmetry class显示文摘The closed-form expressions on strip reflection coefficients of tetragonal 4/mmm, hexagonal 6/mm and trigonal 3m crystal, etc, were derived, which are different from that of cubic m3m crystal published. The reflection coefficients of short-circuited Al grating and groove grating on 112°rotated X-cut Y-propagation LiTaO3 are then given. The reflection property of a short-circuited Al -recessed groove grating on 112°LiTaO3 has been experimentally studied and the condition without internal reflection was achieved. It concludes that the structure of single finger without internal reflection can be realized by the short-circuited Al -recessed groove grating on 112°LiTaO3 and thereafter a pass-band filter with central frequency at 255 MHz, bandwidth about 10 MHz, pass-band ripples less than 0.4 dB was yielded. | XU Fangqian HE Shitang | 2005 | Chinese Journal of Acoustics2005，24，4： | 3 |
| 2 | 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 |
| 3 | 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 |
| 4 | On propagation characteristics of SH-type surface acoustic waves in periodic metal gratings by variational principle显示文摘把陈和 Hau 的理论基于 D.P,一个理论方法被介绍分析嘘类型表面的分散特征与一个变化原则和 coupling-of-modes 在周期的金属性的栅栏结构上宣传的声学的波浪(锯) 方程。没有使用复杂格林的功能,方法的精明的结果 Hashimoto 的理论与那些同意很好。在另一方面, Hashimoto 的方法为在 ST-90 上计算 short-circuited | XU Fangqian HE Shitang LIU Jiansheng CHEN Yixiang | 2009 | Chinese Journal of Acoustics2009，28，2： | 2 |
| 5 | A new micro-rate sensor based on shear horizontal surface acoustic wave gyroscopic effect 显示文摘 | Wang Wen Xu Fangqian He Shitang | 2010 | Japanese Journal of Applied Physics2010，49，09： | 1 |
| 6 | 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 |
| 7 | Protein-spatiotemporal partition releasing gradient porous scaffolds and anti-inflammatory and antioxidant regulation remodel tissue engineered anisotropic meniscus显示文摘Meniscus is a wedge-shaped fibrocartilaginous tissue,playing important roles in maintaining joint stability and function.Meniscus injuries are difficult to heal and frequently progress into structural breakdown,which then leads to osteoarthritis.Regeneration of heterogeneous tissue engineering meniscus(TEM)continues to be a scientific and translational challenge.The morphology,tissue architecture,mechanical strength,and functional applications of the cultivated TEMs have not been able to meet clinical needs,which may due to the negligent attention on the importance of microenvironment in vitro and in vivo.Herein,we combined the 3D(three-dimensional)-printed gradient porous scaffolds,spatiotemporal partition release of growth factors,and anti-inflammatory and anti-oxidant microenvironment regulation of Ac2-26 peptide to prepare a versatile meniscus composite scaffold with heterogeneous bionic structures,excellent biomechanical properties and anti-inflammatory and anti-oxidant effects.By observing the results of cell activity and differentiation,and biomechanics under anti-inflammatory and anti-oxidant microenvironments in vitro,we explored the effects of anti-inflammatory and anti-oxidant microenvironments on construction of regional and functional heterogeneous TEM via the growth process regulation,with a view to cultivating a high-quality of TEM from bench to bedside. | Bingbing Xu Jing Ye Bao-Shi Fan Xinjie Wang Ji-Ying Zhang Shitang Song Yifan Song Wen-Bo Jiang Xing Wang Jia-Kuo Yu | 2023 | Bioactive Materials2023，，2： | 0 |
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