PLC控制的药粒分装机控制器

本文用ＹＱ－４０抗干扰能力强的可编程序控制器控制药粒自动装瓶及显示已装瓶数和当前正在装瓶的料数。     

以科学发展观为指导创造性地做好需求侧管理工作

华东网区4省1市各级政府和人民群众普遍反映,2004年的缺电困难远超过2003年,但电网安全供电秩序好于2003年,大家都比较满意。这得益于认真贯彻落实党中央、国务院、电监会的指示,并紧紧依靠省市政府的主导作用;得益于华东电网公司和各省市电力公司坚持以科学发展观为指导,早研究、早部署、早落实;     

鲜茧/干茧生丝HPLC指纹图谱的构建研究

利用高效液相色谱,获取不同来源鲜茧和干茧生丝的高效液相色谱图,然后通过特征组分信息的提取,文章分别建立鲜茧/干茧生丝各自的HPLC(高效液相色谱法)指纹图谱,并利用指纹图谱对生丝样品进行相似度评价和系统聚类分析,来验证其对生丝的区分效果。结果表明：鲜茧生丝样品之间相似度大于0.919,干茧生丝样品之间相似度大于0.945,同类生丝的一致性良好。但鲜茧、干茧生丝的指纹谱图存在明显差别,说明两类生丝的特征组分不同。根据两类生丝的特征差异进行系统聚类分析,可以完成对两类生丝的准确区分。经方法学验证,指纹图谱用于鲜茧、干茧生丝定性时具有良好的可靠性和可重复性。鲜茧/干茧生丝HPLC指纹图谱能反映出两类生丝的组分差异,可以作为鲜茧/干茧生丝的区分依据。     

基于混沌脉冲位置调制信号的地下管线探测研究

提出了一种基于混沌脉冲位置调制信号的探地雷达系统,可用于城市地下管线探测,该系统以宽带混沌脉冲位置调制信号作为发射信号,利用混沌相关法获取管线埋设深度信息,通过天线扫描实现对管线的二维定位。仿真实现了对地下0.5ｍ、1.0ｍ深处直径为0.2ｍ、0.6ｍ金属和非金属管线的定位,进一步对该系统进行了实验验证。结果表明利用该系统可以对地下不同直径和埋设深度的金属管线或非金属管线进行探测。     

基于内外网门户系统的研究

随着数字化技术、通信技术和计算机技术的高速发展,对传统新闻传播形成了强烈的冲击,以互联网、网络广播与电视、手机电视、数字杂志和报刊、手机电信等在内的新媒体形态以其传播速度快、覆盖面广和互动性强抢占着市场。这就要求传统的报业集团适应报纸、期刊、网站和数字媒体的发展要求,整合媒体新闻资源,利用网络技术,建成覆盖全单位的技术业务平台,这其中,搭建门户平台,构建单位统一的内网门户,实现用户统一认证及管理,业务系统统一入口将会起到十分重要的作用。     

支持受损数据定位与恢复的动态群用户可证明存储

The outsourced storage mode of cloud computing leads to the separation of data ownership and management rights of data owners, which changes the data storage network model and security model. To effectively deal with the software and hardware failures of the cloud server and the potential dishonest service provider and also ensure the availability of the data owners’ data, the design of secure and efficient data availability and recoverability auditing scheme has both theoretical and practical importance in solving the concern of users and ensuring the security of cloud data. However, most of the existing studies were designed for the security and efficiency of data integrity or recoverability schemes, without considering the fast identification and reliable recovery of damaged data under dynamic group users. Thus, to quickly identify and recover damaged data, a publicly verifiable proof of storage scheme was proposed for dynamic group cloud users. The designed scheme enabled a trusted third-party auditor to efficiently identify the damaged files through a challenge-response protocol and allowed the cloud storage server to effectively recover them when the degree of data damage is less than an error correction ability threshold. The scheme combined association calculation and accumulation calculation, which effectively reduced the number of calculations for the identification of damaged data. By combining erasure coding and shared coding technology, the scheme achieved effective recovery of damaged data of dynamic group users. At the same time, the scheme also supported dynamic user revocation, which ensured the integrity audit and reliable recovery of the collective data after user revocation. The network model and threat model of the designed scheme were defined and the security of the scheme under the corresponding security model was proved. Through the prototype implementation of the scheme in the real environment and the modular performance analysis, it is proved that the proposed scheme can effectively identify the damaged data and reliably recover the cloud data when the data is damaged. Besides, compared with other schemes, it is also proved that the proposed scheme has less computational overhead in identifying and recovering damaged data. © 2022, Beijing Xintong Media Co., Ltd.. All rights reserved.     

考虑综合能效水平的能源系统多目标优化运行

作为典型的智慧能源系统,综合能源系统可促进源、网、荷深入融合,提升可再生能源的利用率。因此,智慧能源系统的评价指标应能同时体现低碳、高效的核心特征。基于多能互补的概念,提出了新的评价指标—综合能效水平,用于描述多能系统能源利用效果。考虑到用能经济性是用户自发调整用能策略的核心驱动力,本文以最大化综合能效水平和提高用能经济性为优化目标,提出了综合能源系统多目标优化模型,并在设备物理约束和冷热电平衡的约束下,获取用能优化策略,实现系统出力的优化调度。算例分析表明,本文所提优化调度策略能够全面提升系统用能的清洁性与高效性。     

TiO2基染料敏化太阳能电池的表面修饰及性能研究

采用水热法制备TiO₂浆料,用La(NO₃)₃溶 液浸泡TiO₂薄膜获得修饰电极。用X射线光电子能谱(XPS) 和扫描电子显微镜(SEM)对修饰电极的主要成分及形貌进行表征的结果显示,电极薄膜分为 上下两层,表 面包覆层粒径较大,为La₂O₃颗粒;下层颗粒粒径较小,为TiO₂颗粒。电流-电压测 试结果显示,与修饰 前相比,用La(NO₃)₃溶液浸泡30min获得的膜电极性能最优,使 开路电压和短路电流分别提高了6.8%和 18.5%。电化学阻抗谱(EIS)测试结果表明,相同偏压下,TiO₂/La ₂O₃电极界面复合电阻比TiO₂要大,说明 La₂O₃包覆层在一定程度上抑制了界面的电子复合,改善了电池的光电化学性能。     

钢制立式储罐排板工艺计算机实现

在进行钢制立式储罐排板设计时,使用传统的设计方法其设计过程繁琐,设计工作量大,设计周期长,设计图纸不规范。使用现代设计方法即ＣＡＤ技术,完全能够替代传统的设计方法,而且也提高了设计质量及设计效率