无线局域网应用的接地平面单极天线的设计

提出了一种应用于无线局域网(WLAN)的新型低成本多频段天线,采用斜切角接地的平面单极结构,天线顶部折返成水平面内的两个对称矩形单元来降低高度。同时,通过在垂直辐射单元表面开L形槽的方法,实现了无线局域网高低两个工作频段覆盖的需求。天线在各工作频段内具有良好的全向辐射特性。实测和仿真结果基本吻合,从而验证了这种设计方法的有效性。     

基于AHP-模糊综合评价的海上风机基础状态评估

为掌握服役时期的海上风机基础状态并对海上风机基础状态进行评估,提出一套结合故障树分析（Fault Tree Analysis,FTA）法、层次分析（Analytic Hierarchy Process,AHP）法和模糊综合评价法的海上风机基础状态评价模型。针对导管架式海上风机基础,考虑海洋腐蚀和海底冲刷,通过p-y曲线法模拟桩-土相互作用,在风浪流载荷的作用下进行动力响应分析,采用故障树对其失效模式进行分析,确定评价指标,构造判断矩阵计算指标权重,运用模糊综合评价法对各指标和整体进行评价。该模型结合各评价方法的优点,使评价结果更有说服力,可为海上风电场运行维护管理提供技术参考。     

功能营养型清醇黄酒的构思、提高与创新

在借鉴传统喂饭黄酒工艺的基础上,采用3种原粮(白粳、精糯、血糯)、混药、生熟麦曲、复合酶进行酿造,通过陶缸主酵,陶坛后酵.并在压榨分离的清酒中将清·陶承熹<惠直堂经验名方>养生酒的中药配方加减衍化,应用到酒体风味设计中,在保证黄酒主体风味的前提下,根据市场的需求,添加适宜食药两用名贵中药提取液、精制蜂蜜,平衡、缓冲、调和酒质.使养生花功能营养黄酒风味更加幽雅,清醇,和谐,鲜爽.     

单线普通螺纹工作量规设计计算

在论述单线普通螺纹基本特征与要求的基础上,阐明了单线普通螺纹工作量规的设计思路与计算方法,并简单介绍了单线普通螺纹工作量规的常见结构形式及其在制造过程中的技术要求。     

膨化血粉对豁眼雏鹅生长性能和肉品质的影响

通过饲养试验、屠宰试验研究添加3.0%血粉、3.0%膨化血粉和3.0%鱼粉不同蛋白质原料对豁眼雏鹅(0～4周龄)生长性能和肉品质的影响.结果表明:与3.0%血粉组相比,3.0%膨化血粉组和3.0%鱼粉组的料重比分别降低了11.81%(P＜0.05)与12.66%(P＜0.05),平均日增重分别提高了22.67%(P>0.05)与23.11%(P＜0.05).各组试验鹅肌肉中的干物质、粗蛋白质、粗灰分、钙、磷含量均有所提高(P＜0.05);与3.0%血粉组相比,3.0%鱼粉组和3.0%膨化血粉组肌肉组织中天门冬氨酸、苏氨酸、丝氨酸、谷氨酸、甘氨酸、缬氨酸、蛋氨酸、亮氨酸、苯丙氨酸、赖氨酸、组氨酸、异亮氨酸含量均显著提高(P＜0.05).     

智能波形分析仪

文中提出了对瞬态及低频波的测量方法和要求,并根据测量方法的要求从硬件和软件两方面具体介绍了仪器设计。     

Biodegradable Nanoscale Coordination Polymers for Targeted Tumor Combination Therapy with Oxidative Stress Amplification

Nowadays various inorganic nanoparticles that generate highly reactive hydroxyl radical ( · OH) on the basis of Fenton‐like catalytic activity of metal ions have been designed for chemodynamic therapy. However, the high level of adaptive antioxidants [glutathione (GSH)] in cancer cells could effectively consume · OH to compromise the treatment efficiency and biosafety of these inorganic nanoparticles, and this is a general concern in chemodynamic therapy. Herein, a new biodegradable nanoscale coordination polymer (NCP) is developed by integration of cisplatin prodrug (DSCP) and iron (III) ions through a reverse microemulsion method. The DSCP in the NCPs could react with GSH to release free cisplatin, while the iron (III) ions could be reduced by GSH into iron (II) to enable Fenton reaction, subsequently leading to amplified intracellular oxidative stress. After surface modification of polyethylene glycol (PEG) and cyclo[Arg‐Gly‐Asp‐D‐Phe‐Lys(mpa)] peptide (cRGD), Fe‐DSCP‐PEG‐cRGD shows an excellent targeting effect against α_vβ₃‐integrin overexpressed tumor cells. Furthermore, Fe‐DSCP‐PEG‐cRGD enables significant chemo and chemodynamic therapy with dramatically enhanced therapeutic efficiency in comparison to relative monotherapies. Importantly, Fe‐DSCP‐PEG‐cRGD could be efficiently cleared out from mice through feces and urine postinjection 7 days. The NCP presented in this work is simple and economical, which shows great biodegradability and biosafety for potential clinical translation.     

Embedding ZnSe nanodots in nitrogen-doped hollow carbon architectures for superior lithium storage

Nano Research - Transition metal chalcogenides represent a class of the most promising alternative electrode materials for high-performance lithium-ion batteries (LIBs) owing to their high...     

一种改进型两相静止坐标系增强型锁相环

电网电压中的谐波、不平衡以及直流偏移会在传统两相静止坐标系增强型锁相环(αβ-EPLL)所检测的电网基波电压幅值、频率和相角中产生周期波动,尤其是直流偏移会产生基波频率的周期波动,难以使用低通滤波器直接滤除。提出一种改进的αβ-EPLL结构,在两相信号输入侧引入直流偏移积分器以消除输入直流偏移,在幅值检测环和频率检测环中分别引入延时信号滤波器以消除输入谐波和不平衡的影响。详细的理论分析和实验结果验证了所提出的改进αβ-EPLL的正确性和可行性。