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Reciprocal link for a coupled Camassa-Holm type equation
Nianhua Li,Jinshun Zhang,Lihua Wu
Physics , 2015,
Abstract: A coupled Camassa-Holm type equation is linked to the first negative flow of a modified Drinfeld-Sokolov III hierarchy by a transformation of reciprocal type. Meanwhile the Lax pair and bi-Hamiltonian structure behaviors of this coupled Camassa-Holm type equation under change of variables are analyzed.
Development of an Enhanced Self-Tuning RBF-PID Controller for Achieving Higher Energy-Efficient Process Control  [PDF]
Zu Wang, Liang Xia, John Kaiser Calautit, Xinru Wang, Danwei Jiang, Song Pan, Jinshun Wu
Journal of Building Construction and Planning Research (JBCPR) , 2021, DOI: 10.4236/jbcpr.2021.94017
Abstract: Proportional, integral and derivative (PID) control strategy has been widely applied in heating systems in decades. To improve the accuracy and the robustness of PID control, self-tuning radial-basis-function neural network PID (RBF-PID) is developed and used. Even though being popular, during the control process both of PID and RBF-PID control strategy are inadequate in achieving simultaneous high energy-efficiency and good control accuracy. To address this problem, in this paper we develop and report an enhanced self-tuning radial-basis-function neural network PID (e-RBF-PID) controller. To identify the superiority of e-RBF-PID, following works are conducted and reported in this paper. Firstly, four controllers, i.e., on-off, PID, RBF-PID and e-RBF-PID are designed. Secondly, in order to test the performance of the e-RBF-PID controller, an experimental water heating system is constructed for being controlled. Finally, the energy consumption for the four controllers under the three control scenarios is investigated through experiments. The experimental results indicate that in the three scenarios, the developed e-RBF-PID controller outperforms on-off controller as having higher accuracy. Compared to the PID controller, the e-RBF-PID controller has higher speed in control, and the experimental results show that settling time savings is between 12.6% - 49.0%. Most importantly, less control energy consumption is obtained if using the e-RBF-PID controller. It is found that up to 28.5% energy consumption can be saved. Therefore, it is concluded that the proposed e-RBF-PID is capable of enhancing energy efficiency during control process.
Simulation of a Double-Gate Dynamic Threshold Voltage Fully Depleted Silicon-on-Insulator nMOSFET
Bi Jinshun,Wu Junfeng,Hai Chaohe,
Bi Jinshun,Wu Junfeng,Hai Chaohe
半导体学报 , 2006,
Abstract: A novel planar DGDT FDSOI nMOSFET is presented,and the operation mechanism is discussed.The device fabrication processes and characteristics are simulated with Tsuprem 4 and Medici.The back-gate n-well is formed by implantation of phosphorus at a dosage of 3×1013cm-2 and an energy of 250keV and connected directly to a front-gate n+ polysilicon.This method is completely compatible with the conventional bulk silicon process.Simulation results show that a DGDT FDSOI nMOSFET not only retains the advantages of a conventional FDSOI nMOSFET over a partially depleted (PD) SOI nMOSFET--that is the avoidance of anomalous subthreshold slope and kink effects but also shows a better drivability than a conventional FDSOI nMOSFET.
Improved Breakdown Voltage of Partially Depleted SOI nMOSFETs with Half-Back-Channel Implantation
Wu Junfeng,Zhong Xinghua,Li Duoli,Bi Jinshun,Hai Chaohe,
Wu Junfeng,Zhong Xinghu,Li Duoli,Bi Jinshun,and Hai Chaohe
半导体学报 , 2005,
Abstract: :FB (floating-body) and BC (body-contact) partially depleted SOI nMOSFETs with HBC(half-back-channel) implantation are fabricated.Test results show that such devices have good performance in delaying the occurrence of the "kink" phenomenon and improving the breakdown voltage as compared to conventional PDSOI nMOSFETs,while not decreasing the threshold voltage of the back gate obviously.Numerical simulation shows that a reduced electrical field in the drain contributes to the improvement of the breakdown voltage and a delay of the "kink" effect.A detailed analysis is given for the cause of such improvement of breakdown voltage and the delay of the "kink" effect.
Acute Toxicity of Intravenously Administered Titanium Dioxide Nanoparticles in Mice
Jiaying Xu, Hongbo Shi, Magaye Ruth, Hongsheng Yu, Lissy Lazar, Baobo Zou, Cui Yang, Aiguo Wu, Jinshun Zhao
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0070618
Abstract: Background With a wide range of applications, titanium dioxide (TiO2) nanoparticles (NPs) are manufactured worldwide in large quantities. Recently, in the field of nanomedicine, intravenous injection of TiO2 nanoparticulate carriers directly into the bloodstream has raised public concerns on their toxicity to humans. Methods In this study, mice were injected intravenously with a single dose of TiO2 NPs at varying dose levels (0, 140, 300, 645, or 1387 mg/kg). Animal mortality, blood biochemistry, hematology, genotoxicity and histopathology were investigated 14 days after treatment. Results Death of mice in the highest dose (1387 mg/kg) group was observed at day two after TiO2 NPs injection. At day 7, acute toxicity symptoms, such as decreased physical activity and decreased intake of food and water, were observed in the highest dose group. Hematological analysis and the micronucleus test showed no significant acute hematological or genetic toxicity except an increase in the white blood cell (WBC) count among mice 645 mg/kg dose group. However, the spleen of the mice showed significantly higher tissue weight/body weight (BW) coefficients, and lower liver and kidney coefficients in the TiO2 NPs treated mice compared to control. The biochemical parameters and histological tissue sections indicated that TiO2 NPs treatment could induce different degrees of damage in the brain, lung, spleen, liver and kidneys. However, no pathological effects were observed in the heart in TiO2 NPs treated mice. Conclusions Intravenous injection of TiO2 NPs at high doses in mice could cause acute toxicity effects in the brain, lung, spleen, liver, and kidney. No significant hematological or genetic toxicity was observed.
ω-CIRCULANT BOUNDARY CONDITION
ω循环型边界条件
MEI JINSHUN,
梅金顺
地球物理学报 , 2003,
Abstract: 通过利用预条件共轭梯度法对对称正定Toeplitz矩阵系统进行分析，重点介绍了一种新的嵌入式预条件矩阵构造方法，证明了以前的预条件矩阵构造方法大都是这种方法的特例．提出了ω循环型边界条件，并将其与普通循环型及螺旋型边界条件作了分析、比较后得到了一种新的边界条件即混合型边界条件．
Lithium carbonate plus 131I in the treatment of Graves’ hyperthyroidism  [PDF]
Jinshun Zha, Yan Jiang, Yuan Xu, Qinxiu Lin, Chunling Huang, Tingyin Jiang
Journal of Biomedical Science and Engineering (JBiSE) , 2013, DOI: 10.4236/jbise.2013.67A4001
Abstract: Aims: Effectiveness of radioiodine for Graves’ hyperthyroidism (GD) depends on its intrathyroidal persistence, which could be enhanced by lithium by blocking the release of organic iodine and thyroid hormone from the thyroid gland. The present aim focused on the effect of the addition of lithium carbonate to 131I therapy in patients with GD. Methods: 100 consecutive patients with GD were randomly assigned to two groups: group (A) patients treated with 131I and group (B) patients treated with 131I plus lithium carbonate. Patients in B group were treated with a dose of 0.5 g per day (2 × 0.25 g) of lithium carbonate for half a month before and after the administration of 131I. Thyroid weight was estimated by ultrasonography and careful palpation of the thyroid. Radiation absorbed dose rate in the front of the neck was measured on days 1530 and 45 after the administration of 131I. Serum concentrations of thyroidstimulation hormone (TSH), fee tri-iodothyrosine (T3) and free thyroxine (T4) were tested on days 30, 45, 90, 180 before and after treatment. Results: After RIT, radiation absorbed dose rate in the front of neck gradually decreased as time
Stability of the superposition of boundary layer and rarefaction wave for outflow problem on the two-fluid Navier-Stokes-Poisson system
Haiyan Yin,Jinshun Zhang,Changjiang Zhu
Mathematics , 2015,
Abstract: This paper is concerned with the study of nonlinear stability of superposition of boundary layer and rarefaction wave on the two-fluid Navier-Stokes-Poisson system in the half line $\mathbb{R}_{+}=:(0,+\infty)$. On account of the quasineutral assumption and the absence of the electric field for the large time behavior, we successfully construct the boundary layer and rarefaction wave, and then we give the rigorous proofs of the stability theorems on the superposition of boundary layer and rarefaction wave under small perturbations for the corresponding initial boundary value problem of the Navier-Stokes-Poisson system, only provided the strength of boundary layer is small while the strength of rarefaction wave can be arbitrarily large. The complexity of nonlinear composite wave leads to many complicated terms in the course of establishing the {\it a priori} estimates. The proofs are given by an elementary $L^2$ energy method.
Five Nuclear Loci Resolve the Polyploid History of Switchgrass (Panicum virgatum L.) and Relatives
Jimmy K. Triplett, Yunjing Wang, Jinshun Zhong, Elizabeth A. Kellogg
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0038702
Abstract: Polyploidy poses challenges for phylogenetic reconstruction because of the need to identify and distinguish between homoeologous loci. This can be addressed by use of low copy nuclear markers. Panicum s.s. is a genus of about 100 species in the grass tribe Paniceae, subfamily Panicoideae, and is divided into five sections. Many of the species are known to be polyploids. The most well-known of the Panicum polyploids are switchgrass (Panicum virgatum) and common or Proso millet (P. miliaceum). Switchgrass is in section Virgata, along with P. tricholaenoides, P. amarum, and P. amarulum, whereas P. miliaceum is in sect. Panicum. We have generated sequence data from five low copy nuclear loci and two chloroplast loci and have clarified the origin of P. virgatum. We find that all members of sects. Virgata and Urvilleana are the result of diversification after a single allopolyploidy event. The closest diploid relatives of switchgrass are in sect. Rudgeana, native to Central and South America. Within sections Virgata and Urvilleana, P. tricholaenoides is sister to the remaining species. Panicum racemosum and P. urvilleanum form a clade, which may be sister to P. chloroleucum. Panicum amarum, P. amarulum, and the lowland and upland ecotypes of P. virgatum together form a clade, within which relationships are complex. Hexaploid and octoploid plants are likely allopolyploids, with P. amarum and P. amarulum sharing genomes with P. virgatum. Octoploid P. virgatum plants are formed via hybridization between disparate tetraploids. We show that polyploidy precedes diversification in a complex set of polyploids; our data thus suggest that polyploidy could provide the raw material for diversification. In addition, we show two rounds of allopolyploidization in the ancestry of switchgrass, and identify additional species that may be part of its broader gene pool. This may be relevant for development of the crop for biofuels.
Study on the Characteristics of SOI DTMOS with Reverse Schottky Barriers
SOI反偏肖特基势垒动态阈值MOS特性
Bi Jinshun,Hai Chaohe,
毕津顺,海潮和
半导体学报 , 2006,
Abstract: Silicon-on-insulator dynamic threshold voltage MOSFETs with TiSi2/p-Si as reverse Schottky barriers (RSB) are presented.With this RSB scheme,DTMOS can operate beyond 0.7V,thus overcoming the drawback of DTMOS with the gate and body connected.The experimental results demonstrate that the threshold voltage in DT mode with an RSB is reduced by about 200mV at room temperature.SOI MOSFETs in DT mode with an RSB have advantages such as excellent subthreshold slope and high drivability over those under normal mode operation.The breakdown characteristics of SOI MOSFETs in the off-state are compared for the DT mode with RSB,floating body mode,normal mode.
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