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Dynamical control of directional nonlinear scattering from metallic nanoantennas by three-dimensional focal polarization orientation

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Optoelectronics Letters 2021年第2期17卷 65-69页

作者： wang Xiang-hui wang jian-xin ZENG Ming Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology Institute of Modern OpticsNankai UniversityTianjin 300350China School of Electrical Engineering and Automation Tianjin UniversityTianjin 300072China

We demonstrate that the directionality of far-field second harmonic(SH) emission generated from individual gold nanosphere can be flexibly engineered by manipulating three-dimensional(3D) focal polarization orientation of the excitation field, which is explained by the coherent interference between SH dipolar and quadrupolar emission modes. The SH dipolar emission mode is independent of the polarization direction of the fundamental field whereas the evolution of the focal polarization orientation can dramatically modify the quadrupolar emission pattern. Therefore, the resultant SH emission pattern has a polarization-dependent behavior and side scattering almost perpendicular to the propagation direction of the incident light can be observed under a specific condition. Our findings provide a novel degree of freedom for all-optical control of directional nonlinear scattering from single nanoantenna, thereby opening new possibilities for future potential applications.

关键词： polarization scattering antenna

Activity of Azoxystrobin and SHAM to Four Phytopathogens

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Agricultural Sciences in China 2009年第7期8卷 835-842页

作者： JIN Li-hua CHEN Yu CHEN Chang-jun wang jian-xin ZHOU Ming-guo College of Plant Pathology Nanjing Agricultural University Nanjing 210095 P.R.China

The study was conducted to make clear the activity of azoxystrobin to 4 plant pathogens and the synergistic effects of salicylhydroxamic acid （SHAM）, which acted on the alternative oxidase. It was also conducted to be aware of the mechanism of azoxystrobin in inhibition on mycelial respiration and the influence of SHAM. The activity test of azoxystrobin and SHAM was carried out with a mycelial linear growth test and spore germination test. Other related biological properties were also observed. Inhibition of azoxystrobin and SHAM on 4 pathogens was determined by using SP-II oxygraph system. Azoxystrobin inhibited mycelial growth in Colletotrichum capsici, Botrytis cinerea, Rhizoctonia solani, and Magnaporthe grisea, respectively; it also inhibited conidia germination, and conidia production in C. capsici, B. cinerea M. grisea, and sclerotia formation in R. solani. Moreover, it created stayed pigment biosynthesis in C. capsici and M. grisea somehow. Salicylhydroxamic acid enhanced inhibition by azoxystrobin. An oxygen consuming test of the mycelia showed that azoxystrobin inhibited all the 4 fungi＇s respiration in the early stages. With the concentration rising up, the effectiveness increased. However, as time went on, the respiration of the mycelia treated with fungicides recovered and SHAM could not inhibit the oxygen consuming. This reaction between the mycelia and the fungicides appeared not to initiate alternative respiration but rather the other mechanism created a lack of efficacy.

关键词： azoxstrobin salicylhydroxamic acid (SHAM) plant pathogens spore germination mycelial growth oxygenconsumption rate

Biological Mode of Action of Dimethomorph on Pseudoperonospora cubensis and Its Systemic Activity in Cucumber

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Agricultural Sciences in China 2009年第2期8卷 172-181页

作者： wang Han-cheng ZHOU Ming-guo wang jian-xin CHEN Chang-jun LI Hong-xia SUN Hai-yan College of Plant Protection Nanjing Agricultural University Nanjing 210095 P.R.China

Dimethomorph is a fungicide with high activity against Peronosporomycetes plant pathogens. The present study showed that dimethomorph is effective on controlling the oomycete fungal pathogen Pseudoperonospora cubensis causing downy mildew on cucumber. The fungicide did not affect zoospores discharge from sporangia of P. cubensis, but it strongly inhibited mycelial growth and sporangial production in vitro and increased lysis of zoospores. Dose of 2 mg L^-1 of dimethomorph was sufficient to inhibit mycelial growth and sporangial production of P. cubensis on leaf disks, 5 mg L^-1 was enough to lyse zoospores of P. cubensis, and 25 mg L^-1 was required to inhibit sporangial production on detached leaves. In whole plant tests, dimethomorph exhibited strong protective and curative activity. Dimethomorph when applied at a dose of 300 mg L^-1 for 1, 3, 5, 7 days before inoculation exhibited 100% efficacy on disease control. On the other hand, efficacies of 67.1 and 31.5% were obtained when the same dose of dimethomorph was applied for 1 and 3 days after inoculation, respectively. So dimethomorph had persistence effect on leaves for 7 days at least and exhibited strong protective and curative activity. Bioassay analyses showed that dimethomorph could be translocated in the xylem system, redistributed in the leaf, and penetrated from the upper surface to the lower surface of the leaf but could not be translocated in phloem system or transferred from the roots to leaves of cucumber plants in sufficient amounts for disease control. The biocharacteristics of dimethomorph make it well suitable for integration of a control programme against downy mildew disease on cucumber and as a component to delay other peronosporomycetes fungicide-resistance development.

关键词： biological activity dimethomorph Pseudoperonospora cubensis systemic activity

Anycast service model and its QoS routing algorithm

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Journal of Central South University 2001年第2期8卷 135-139页

作者： wang jian xin, CHEN Song qiao, CHEN jian er (College of Information Science and Engineering, Central South University, Changsha 410083, China) 1. College of Information Science and Engineering Central South University 410083 Changsha China

In the Internet, a group of replicated servers is commonly used in order to improve the scalability of network service. Anycast service is a new network service that can improve network load distribution and simplify certain applications. In this paper, the authors described a simple anycast service model in the Internet without significant affecting the routing and protocol processing infrastructure that was already in place, and proposed an anycast QoS routing algorithm for this model. The algorithm used randomized method to balance network load and improve its performance. Several new techniques are proposed in the algorithm, first, theminimum hops for each node are used in the algorithm, which are used as metric for computing the probability of possible out links. The metric is pre computed for each node in the network, which can simplify the network complexity and provide the routing process with useful information. Second, randomness is used at the link level and depends dynamically on the routing configuration. This provides great flexibility for the routing process, prevents the routing process from overusing certain fixed routing paths, and adequately balances the delay of the routing path. the authors assess the quality of QoS algorithm in terms of the acceptance ratio on anycast QoS requests, and the simulation results on a variety of network topologies and on various parameters show that the algorithm has good performances and can balance network load effectively.

关键词： QoS anycast service network routing randomized algorithm

The Effect of Administration of Rutin on Plasma Levels of Estrogen, Prolactin, Growth Hormone and Gene Expression of Their Receptors in Mammary Glands in Ovariectomized Rats

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Journal of Integrative Agriculture 2012年第10期11卷 1700-1706页

作者： GUO Xu-dong DIAO Qi-yu wang Yue-ying TU Yan DENG Kai-dong wang xin-jian FU Tong YAN Gui-long Key Laboratory of Feed Biotechnology Ministry of Agriculture/Feed Research Institute Chinese Academy of Agricultural Sciences Key Laboratory of Animal Growth and Development Ministry of Agriculture/Henan Agricultual University College of Animal Sciences Jinling Institute of Technology College of Animal Sciences Hebei North University

The development of mammary glands, endocrine hormone concentrations and the gene expression of related receptors were measured in ovariectomized virgin rats after adminstration of an estrogen-like plant extract, rutin. Thirty-two ovariectomized virgin Wistar rats were randomly assigned to 4 treatments with 8 animals each： gastric infusion of 2 mL normal saline per unovariectomized rat per day （Sham）, gastric infusion of 2 mL normal saline per ovariectomized rat per day （Ova）, gastric infusion of 60 mg rutin kg-1 body weight （BW） per ovariectomized rat per day （Ova＋Rut）, or intramuscular injection of 60 ug estradiol kg-1 BW per ovariectomized rat weekly （Ova＋Est）. Samples of blood and mammary glands were harvested to determine the levels of estrogen （E2）, prolactin （PRL） and growth hormone （GH）, and the gene expression of estrogen receptors （ER）, prolactin receptors （PRLR） and growth hormone receptors （GHR） with radioimmunoassy （RIA） and RT-PCR technology, respectively. The E2 concentration in plasma and gland tissues from the rats of Ovx＋Rut or Ovx＋Est was higher than that of Ovx （P〈0.05）, but the plasma E2 concentration from the rats of Ovx＋Rut was lower than that of Sham （P〈0.05）. The order of the PRL concentration in plasma and gland tissues was Ovx〈Ovx＋Rut〈Ovx＋Est 〈Sham, and the difference in each treatment （P〈0.05）. The plasma GH concentration was lower in Ovx than in Ovx＋Rut or Ovx＋Est, and lower in Ovx＋Rut than in Sham （P〈0.05）. The GH concentration in gland tissues was lower in Ovx than in Ovx＋Rut or Ovx＋Est （P〈0.05）, and lower in Ovx＋Rut than in Sham （P〈0.05）. The gene expression of ER in gland tissues was increased in an order as Ovx〈Ovx＋Rut〈Ovx＋Est〈Sham （P〈0.05）, and PRLR, GHR showed the same trend. In conclusion, adminstration of rutin increased the E2 concentration in plasma and mammary glands, promoted pituitary PRL and GH release, up-regulated the gene expression of ER, PRLR and GHR, and stimulated mammary development in ovariectomized virgin rats.

关键词： rutin rats mammary gland development hormones receptors

Structure, composition and enzymatic hydrolysis of steam-exploded lespedeza stalks

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Forestry Studies in China 2007年第2期9卷 137-141页

作者： wang Kun wang Fang jiang jian-xin Zhu Li-wei Fan Hong-zhuai College of Materials Science and Technology Beijing Forestry University Beijing 100083 P. R. China

Pretreatment of lespedeza stalks by steam explosion has been studied. The results indicate that steam-exploded pretreatment has strong effects on physical features, morphology, crystallinity, and composition of lespedeza stalks as shown by scanning electron microscopy （SEM）, infrared （IR）, and X-ray diffraction spectrometry methods. After steam explosion, the cellulose and lignin contents of lespedeza stalks varied only slightly, but the hemicellulose content had decreased from 29.34% to 7.48%. The cellulose obtained by steam-exploded pretreatment had a higher degree of crystallinity than that of the raw material. At the explosion condition of 2.25 MPa and 4 min, lignocellulose is easier to hydrolyze by enzyme than the original lignocellulose. The concentration of reduced sugar in the hydrolyzate liquid increased from 71.77 to 162.84 g·L^-1.

关键词： steam explosion lespedeza stalks structure composition enzymatic hydrolysis

Extended resection for locally advanced colorectal cancer

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Chinese Medical Journal 2006年第20期119卷 1675-1676页

作者： wang jian-ping SONG xin-ming Department of Gastrointestinopancreatic Surgery First Affiliated Hospital Sun Yat-sen University Guangzhou 510080 China

Colorectal cancer is a common cause of cancer-related mortality. In China, it is one of eight cancers in the cancer control blueprint, which are suggested to have comprehensive treatment. Some patients with colorectal cancer presented no symptoms when they were diagnosed, yet the tumor had already penetrated the intestinal wall and involved adjacent organs. If the tumor is localized at time of diagnosis without distant metastases, it is termed locally advanced colorectal cancer （LACC） regardless of whether there is lymph node metastasis. LACC commonly encountered in clinical practice accounts for 5%-10% of all colorectal cancers.

关键词：前体细胞淋巴母细胞白血病淋巴瘤结直肠肿瘤淋巴一氧化氮胰岛素中国肿瘤

一种改进的接地网故障诊断算法及测试方案评价

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中国电机工程学报 2005年第3期25卷 71-77页

作者：刘健王建新王森西安科技大学电控学院西北电力试验研究院陕西省西安市710054 西北电力试验研究院

为了提高接点网故障诊断精度,提出一种改进的接地网故障诊断算法,采用在可及节点中轮换电流源激励的位置和每处激励时多处测量节点电压的方法,充分利用了可及节点并显著增加了方程的个数,建立了反映各种激励条件下支路电阻变化量与可及... 详细信息

为了提高接点网故障诊断精度,提出一种改进的接地网故障诊断算法,采用在可及节点中轮换电流源激励的位置和每处激励时多处测量节点电压的方法,充分利用了可及节点并显著增加了方程的个数,建立了反映各种激励条件下支路电阻变化量与可及节点电压变换量之间的非线性关系的增广故障诊断方程,该方程的求解采用迭代的方法逐步用线性方程来逼近非线性方程,采用优化方法求出迭代中的线性方程的最小二乘意义的最优解。根据归一化增广故障诊断方程中行向量间的距离得出独立方程的个数,并以此作为对测试方法进行定量评价的依据,还讨论了电压的量测误差对支路电阻诊断结果的影响,对实例的计算、分析和测试表明,提出的方法是可行的。

关键词：接地网故障诊断算法节点电压电阻电流源接点测量迭代个数非线性方程

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基于CAN总线的汽车电子集成控制系统

哈尔滨工业大学学报 2006年第5期38卷 811-814页

作者：王建新合肥工业大学计算机与信息学院安徽合肥230009

介绍了控制器局域网CAN的基本性能,提出以CANBUS为纽带,连接电子控制单元ECU,组成一个汽车电子集成控制系统.讨论了CANBUS+ECUn这种结构下的新功能,以及汽车智能化、网络化所具有的基本功能.并提出了改善控制算法的可能性,使得汽车电子... 详细信息

介绍了控制器局域网CAN的基本性能,提出以CANBUS为纽带,连接电子控制单元ECU,组成一个汽车电子集成控制系统.讨论了CANBUS+ECUn这种结构下的新功能,以及汽车智能化、网络化所具有的基本功能.并提出了改善控制算法的可能性,使得汽车电子技术能够从单个部件的电子化,发展到总成电子化、模块化,最终形成整车模块综合化的控制器网络系统.

关键词：现场总线控制系统控制器局域网电子控制单元汽车