高功率Z-pinch装置5MV主开关及开关区设计

基于激光等离子体和过电压波击穿原理研制了应用于高功率“Z-pinch”装置的22级5 MV激光触发多级多通道开关,采用钳位环技术解决了狭小空间的匀场问题,过压自击穿间隙场分布不均匀度约为0.080,激光触发间隙场分布不均匀度约为0.056,由绝缘部件沿面电场强度决定的系统安全系数约为0.8。根据J.C.Martin公式和静电场分析计算结果,解决了高功率“Z-pinch”装置主开关及开关区的工程设计问题。

英确认DNA四螺旋结构富集于基因开关区或能用于癌症靶向疗法研发

据中国科技网2016年9月23日报道，继2013年发现脱氧核糖核酸（DNA）也有四螺旋结构后，英国剑桥大学巴拉苏布拉曼尼研究团队识别出了人体细胞中这种四螺旋DNA结构在基因组内的具体位点，并证明这种结构将在开发新型靶向癌症疗法中扮演重要角色。研究成果刊登在《自然·遗传学》杂志上。

新型插接式计量表箱

计量表箱是供电部门最常用的计量装置，随着电网的升级改造，计量表箱也经过多次换代改进，由原有的空计量箱壳到现在的控制开关区和表计安装区分区布置、电源线和通信线接线内置等，计量表箱的设计更为合理，安装也更加简便。

二硫吡咯酮类衍生物的合成及抗菌活性研究

目的设计合成具有抗菌活性的二硫吡咯酮类衍生物。方法以6-氨基-1,2-二硫杂环戊烯[4,3-b]吡咯-5(4H)-酮环为骨架结构,经过酰胺化、亲核取代等反应合成了14个N-芳基二硫吡咯酮类衍生物。采用纸片扩散法抑制金黄色葡萄球菌实验测定了所有目标化合物体外抗菌活性,对优选化合物进行了最低抑菌浓度测定和大肠埃希菌RNA聚合酶抑制活性测定,并利用分子对接方法对化合物2i的作用机制进行了预测。结果与结论目标化合物均经1H NMR、13 C NMR和ESI-MS谱确证。2i具有较强的抗菌活性,分子对接结果也表明其与RNA聚合酶开关区具有较强的相互作用,值得做进一步研究。

卫浴品牌积极参加衢州建材展

4月15日-17日，衢州家居建材展会隆重举行。本发展会分为橱柜、衣柜区，门业、吊顶、楼梯区，洁具、实木强化地板区，墙纸、电器开关区，瓷砖、洁具区，家具区7个展览区。箭牌、恒洁、法思莎、东鹏、益高、九牧、鹰卫浴、畔岛卫浴等知名建材卫浴品牌均有参展。

差动放大器及模拟乘法器电工模型

本文对模拟集成电路的主要组成单元差动放大器和模拟乘法器提出一种新的分析方法和简明的数学模型。

Buffer and Switch： Road-to-Road Routing Scheme for Intermittently Connected Vehicular Networks

Due to the road-constrained data delivery and highly dynamic topology of vehicle nodes in a Vehicular Ad Hoc Network (VANET), it is better to construct routing based on the road-to-road pattern than the traditional node-to-node routing pattern in MANETs. However, the challenging issue is the opportunistic forwarding at intersections. Therefore, we propose a novel routing scheme, called Buffer and Switch (BAS). In BAS, each road buffers the data packets with multiple duplicates propagation in order to provide more opportunities for packet switching at intersections. Different from conventional protocols in VANETs, the propagation of duplicates in BAS is bidirectional along the routing path. Moreover, BAS's cost is much lower than other flooding-based protocols due to its spatio-temporally controlled duplicates propagation. Different from recent researches, BAS can deliver packets not only to a stationary node, but also to the stationary or mobile nodes in a specified area. We conduct the extensive simulations to evaluate the performance of BAS based on the road map of a real city collected from Google Earth. The simulation results show that BAS can outperform the existing protocols, especially when the network resources are limited.

An improved SVPWM control algorithm for three-level inverter

In the traditional three-level space vector pulse width modulation(SVPWM)algorithm,the sector judgment is computationallycomplex since the sector is divided into triangles and hexagons.In addition,the switching frequency is high becausethe seven-segment switching sequence is adopted.For this reason,a new SVPWM control algorithm for three-level inverteris proposed,in which the sector judgment is simplified by dividing the sector into quasi hexagons?and the new four-segmentswitching sequence is adopted to reduce the switching frequency.Simulation results show that the total harmonic distortiongrows down with the switching frequency decreasing,moreover,the algorithm runtime is also decreased.

Stability switches and Bogdanov-Takens bifurcation in an inertial two-neuron coupling system with multiple delays

In this paper,we investigate an inertial two-neural coupling system with multiple delays.We analyze the number of equilibrium points and demonstrate the corresponding pitchfork bifurcation.Results show that the system has a unique equilibrium as well as three equilibria for different values of coupling weights.The local asymptotic stability of the equilibrium point is studied using the corresponding characteristic equation.We find that multiple delays can induce the system to exhibit stable switching between the resting state and periodic motion.Stability regions with delay-dependence are exhibited in the parameter plane of the time delays employing the Hopf bifurcation curves.To obtain the global perspective of the system dynamics,stability and periodic activity involving multiple equilibria are investigated by analyzing the intersection points of the pitchfork and Hopf bifurcation curves,called the Bogdanov-Takens(BT)bifurcation.The homoclinic bifurcation and the fold bifurcation of limit cycle are obtained using the BT theoretical results of the third-order normal form.Finally,numerical simulations are provided to support the theoretical analyses.

Thermal Magnifier and Minifier

For thermal conduction cases,one can detect the size of an object explicitly by measuring the temperature distribution around it.If the temperature is the only signature we can obtain,we will give an incorrect judgment on the shape or size of the object by disturbing the distribution of it.According to this principle,in this article,we develop a transformation method and design a dual-functional thermal device,which can create a thermal illusion that the object inside it ＂seems＂ to appear bigger or smaller than its original size.This device can functionally switch among magnifier and miniGer at will The proposed device consists of two layers：the cloak and the complementary material.A thermal cloak can make the internal region thermally ＂invisible＂ while the complementary layer offsets this effect.The combination leads to the illusion of magnification and minification.As a result of finite element simulations,the performances of the illusions are confirmed.

又拿大奖了

历时5个月的焦点课题改善成果终于发布了。当TPM推行部宣布我们的课题获得第二名时，我高兴的要跳起来了。代表“导航先锋”小组捧着来之不易的奖励金时。我的心情复杂的难以言表，有课题获得成功的喜悦，有辛劳得到肯定的激动，有团队的共同骄傲，还有未得“第一”的小失落……