一种基于ZigBee技术远程无线抄表系统的实现

为了解决传统抄表方式低效、易出错的问题,提出了一种基于ZigBee技术和GPRS技术的低成本、低功耗电力抄表系统,阐述了系统的总体构成,对硬件系统中的终端采集节点、路由节点、协调器节点进行了设计,并给出了程序流程图。该系统实现了对用户电能表数据信息高效、快速和可靠的远程采集,提高了电力抄表效率。     

大气温度起伏谱的测量

用直径1μm和10μm金属丝分别测量了大气温度起伏功率谱,提出了测量湍流外尺度的方法。实测结果表明：在复杂的光传输路径上至少有50%的温度谱不符合Kolmogorov的－5/3定律;用直径1μm丝进行单点测量的C2n和直径10μm丝进行双点测量的C2n较为一致;80%的外尺度不超过7m。     

CC安全功能组件形式化分析

先提出了一种CC(common criteria)安全功能组件的形式化分析方法，对CC中的135个组件分别作形式化分析，评估各组件规范安全功能要求的确定性，并在此基础上进一步分析安全功能类的标准化规范程度及其优缺点。     

ZigBee技术在蓄电池监测系统中的应用

本文在概述铅酸蓄电池特性及其常用充放电监测方法的优缺点后,详细介绍ZigBee技术及其特点并论述了基于ZigBee网络进行蓄电池充放电参数检测和传输的可行性.给出了基于CC2430的蓄电池充放电参数监测系统设计方案.     

电力负荷管理系统的建设

随着国家经济的大踏步发展和电网设施的逐步完善,电力负荷管理系统在电网营销管理工作中的地位又提升了一步.负荷管理系统通过无线信道,对安装在用户侧的终端设备进行监测,从而具备了远程抄表、预购电、防窃电、用电质量监测、负荷控制、用电信息服务、控制地方上网电厂等功能以适合市场的发展需要.负荷管理系统是促进电力需求侧管理,实现有序用电的重要技术支持手段.     

3D Porous Honeycomb-Like CoN-Ni3N/N-C Nanosheets Integrated Electrode for High-Energy-Density Flexible Supercapacitor

Transition metal nitrides (TMNs) are considered as potential electrode materials for high-performance energy storage devices. However, the structural instability during the electrochemical reaction process severely hinders their wide application. A general strategy to overcome this obstacle is to fabricate nanocomposite TMNs on the conducting substrate. Herein, the honeycomb-like CoN-Ni₃N/N-C nanosheets are in situ grown on a flexible carbon cloth (CC) via a mild solvothermal method with post-nitrogenizing treatment. As an integrated electrode for the supercapacitor, the optimized CoN-Ni₃N/N-C/CC achieves remarkable electrochemical performance due to the enhanced intrinsic conductivity and increased concentration of the active sites. In particular, the flexible quasi-solid-state asymmetric supercapacitor assembled with CoN-Ni₃N/N-C/CC cathode and VN/CC anode delivers an excellent energy density of 106 μWh cm⁻², maximum power density of 40 mW cm⁻², along with an outstanding cycle stability. This study provides a neoteric perspective on construction of high-performance flexible energy storage devices with novel metallic nitrides.     

无线智能仓储管理系统的设计与实现

利用RFID技术与ZigBee技术融合组网的方式实现了智能仓储管理系统的设计。重点阐述了由CC2530作为ZigBee无线通信的射频芯片和核心控制器,CLRC632作为RFID射频芯片组成网络中各节点的硬件结构,同时给出了系统软件设计主流程图。经测试表明,该系统能够实现门禁、考勤、物品定位、安防等高效、实时地智能化仓储管理。     

Cleavage of acetylenic substituents from camphor-derivatives by copper(I) chloride

Copper(I) chloride was found to be a highly efficient reagent to promote the cleavage of acetylenic substituents from the camphor skeleton of compounds 1 containing two C-C triple bonds as well as from the compounds 6 and 7 containing one. This is a formal reversal of the formation of these compounds by the reaction of acetylides with keto and imino groups in compound 18. The substituent R at the triple bond modifies the reactivity and regioselectivity. As intermediates in the process we identified complexes of the types [Cu(L)_depr] (where (L)_depr denotes a deprotonated camphor-derived ligand (L)) and [CuCl(L)]. Quantum mechanical calculations support and rationalize the experimental results.     

Optical Spectra of Oligofurans: A Theoretical Approach to the Transition Energies,Reorganization Energies,and the Vibronic Activity

There is experimental evidence of high vibronic activity that accompanies the allowed transition between the ground state and the lowest electronic singlet excited state of oligofurans that contain two, three, and four furan rings. The absorption and emission spectra of the three lowest oligofurans measured at liquid nitrogen temperature show distinct fine structures that are reproduced using the projection-based model of vibronic coupling (with Dushinsky rotation included) parameterized utilizing either Density Functional Theory (DFT, with several different exchange-correlation functionals) or ab initio (CC2) quantum chemistry calculations. Using as a reference the experimental data concerning the electronic absorption and fluorescence for the eight lowest oligofurans, we first analyzed the performance of the exchange-correlation functionals for the electronic transition energies and the reorganization energies. Subsequently, we used the best functionals alongside with the CC2 method to explore how the reorganization energies are distributed among the totally symmetric vibrations, identify the normal modes that dominate in the fine structures present in the absorption and emission bands, and trace their evolution with the increasing number of rings in the oligofuran series. Confrontation of the simulated spectra with the experiment allows for the verification of the performance of the selected DFT functionals and the CC2 method.     

433MHz有源电子标签的设计与实现

随着射频识别技术的发展,有源电子标签的应用越来越广泛,现有的电子标签或多或少存在缺陷。介绍了无线通信芯片CC1110的主要功能与特点和基于CC1110芯片的有源电子标签的设计,并给出了硬件电路图及应用ADS软件进行匹配和优化设计的结果。很大程度上降低了成本和减少了标签的厚度。给出了标签的具体尺寸和测试结果,达到使用要求。可广泛应用于资产管理,具有很大的发展前景。提出优化标签的方向。