Amino acid template-synthesis and characterization of three-dimensional metal phosphate/phosphite networks

In this contribution, two novel metal phosphate/phosphate, namely [Zn₂(HPO₃)₂(H₂O)₄]·H₂O (1) and Cd₅(HPO₄)₂(PO₄)₂(H₂O)₄ (2), were obtained by amino acid template-synthesis under mild hydrothermal conditions. X-ray crystallographic studies show that the inorganic network of 1 contains binuclear zinc building units with large 16-ring channels along [1 0 0] directions. The structure of 2 consists of asymmetric pentanuclear chiral motifs. It is notable that two centered pentanuclear cadmium structure motifs form a mesomeric unit, which is linked by bridging oxygen atoms to construct 3D inorganic network.     

A compositional model for CO2 flooding including CO2 equilibria between water and oil using the Peng–Robinson equation of state with the Wong–Sandler mixing rule

This paper presents a three-dimensional, three-phase compositional model considering CO₂ phase equilibrium between water and oil. In this model, CO₂ is mutually soluble in aqueous and hydrocarbon phases, while other components, except water, exist in hydrocarbon phase. The Peng–Robinson (PR) equation of state and the Wong–Sandler mixing rule with non-random two-liquid parameters are used to calculate CO₂ fugacity in the aqueous phase. One-dimensional and three-dimensional CO₂ flooding examples show that a significant amount of injected CO₂ is dissolved in water. Our simulation shows 7% of injected CO₂ can be dissolved in the aqueous phase, which delays oil recovery by 4%. The gas rate predicted by the model is smaller than the conventional model as long as water is undersaturated by CO₂, which can be considered as “lost” in the aqueous phase. The model also predicts that the delayed oil can be recovered after the gas breakthrough, indicating that delayed oil is hard to recover in field applications. A three-dimensional example reveals that a highly stratified reservoir causes uneven displacement and serious CO₂ breakthrough. If mobility control measures like water alternating gas are undertaken, the solubility effects will be more pronounced than this example.     

A Case for Adaptive Resource Management in Alibaba Datacenter Using Neural Networks

Both resource efficiency and application QoS have been big concerns of datacenter operators for a long time,but remain to be irreconcilable.High resource utilization increases the risk of resource contention between co-located workload,which makes latency-critical(LC)applications suffer unpredictable,and even unacceptable performance.Plenty of prior work devotes the effort on exploiting effective mechanisms to protect the QoS of LC applications while improving resource efficiency.In this paper,we propose MAGI,a resource management runtime that leverages neural networks to monitor and further pinpoint the root cause of performance interference,and adjusts resource shares of corresponding applications to ensure the QoS of LC applications.MAGI is a practice in Alibaba datacenter to provide on-demand resource adjustment for applications using neural networks.The experimental results show that MAGI could reduce up to 87.3%performance degradation of LC application when co-located with other antagonist applications.     

丙烷脒类似物抑菌活性研究

以番茄灰霉病菌和白菜黑斑病菌等植物病原菌作为供试生物,用抑制菌丝生长速率法测定了合成的10个丙烷脒类似物的抑菌活性。结果表明：在供试浓度为10mg／L时,化合物A1-A5对番茄灰霉病菌、白菜黑斑病菌、苹果干腐病菌和烟草赤星病菌菌丝生长抑制率均在80％以上;化合物B5对小麦纹枯病菌菌丝生长抑制率为82．2％,值得进一步研究。     

多功能食品安全综合快速现场检测仪设计

目的设计一种食品安全快速检测仪,实现多功能、高通量检测与数据采集传输一体化,提高食品安全现场检测效率。方法通过分析比色法、酶联免疫法(enzyme-linked immunosorbent assay,ELISA)、胶体金试纸及相应仪器的工作原理,依据现场快速检测的实际需求,提出了基于分光光度法的单光束与多光束光路集成的仪器优化方案和一种基于图像处理技术的现场胶体金试纸自动快速检测方案。以MC9S12XS128单片机为控制核心,设计搭建了分光机构、胶体金试纸图像采集、试样容器、光电转换与信号调理电路等模块,实现了4通道和96通道ELISA的光路转换、信号采集与处理、试样载板控制、胶体金多元检测等功能。结果 ELISA检测模块光度准确度?T1.403%,光度重复度δT0.14%,通道间透光率差异小于0.97%;比色检测模块光度准确度?T1.650%,光度重复度δT0.50%;胶体金试纸自动读取模块,快检试纸的量化结果与真值的相关度r~2=0.84。结论 ELISA模块和比色法各项指标符合食品安全快速检测的应用要求,胶体金试纸自动读取模块量化结果与真值的相关度低于要求,需要继续进行算法和装置的优化。     

含铁柱撑膨润土光催化降解OrangeⅡ

制备了两种含铁柱撑膨润土(Fe—Al—Bent和Fe—Bent),用XRD、BET、TEM对它们进行了性能表征。以偶氮染料OrangeⅡ为目标降解物,考察了它们作为复相Fenton催化剂的光催化性能,以及溶液的pH、H2O2浓度、催化剂用量对OrangeⅡ降解的影响．并与相应的均相Fenton反应进行了比较。结果表明Fe—Al—Bent和Fe—Bent具有很高的比表面积(分别为194．2和114．6m^2／g),用Fe—Al—Bent或Fe—Bent作光催化剂的复相光助Fenton反应的催化性能明显优于相应的均相光助Fenton反应。此外复合铁铝柱撑膨润土(Fe-Al-Bent)比单一的铁柱撑膨润土(Fe-Bent)在反应过程中具有更低的铁离子溶出量,它们还具有分离简单、重复使用性好等特点。     

基于SOA的中小型企业供应链管理系统的研究

在实施供应链管理系统过程中,部分企业简单地从物流管理的角度去看待SCM。对供应链管理认识不够导致系统自身存在业务能力差、生产效率低、集成效果不理想等问题,许多供应链管理系统实际上只是扮演一个数据存储的角色。针对这些问题提出了基于SOA的供应链管理系统设计方案,从基于SOA思想的设计原则出发,论述了基于WEB服务的实现方法与关键技术,对该系统面向服务架构进行总体规划。利用Web service和XML技术,采用三层结构设计模式,成功开发了一个中小型企业集成供应链系统,实现了供应链伙伴的信息和数据业务的共享和发布,加强了供应链上各企业伙伴的沟通,为解决上述问题提供一个可行的方案,较好地适应制造业复杂多变的环境和多样化的企业需求。     

《电工学》教学探讨

《电工学》是很多工科非电类专业的主干技术基础课程,在教学过程中要充分体现出课程的工程性和实践性,树立理论联系实际的工程观念,提高分析问题和解决问题的能力。本课程由于内容丰富而课时较少,同时概念、公式众多,初学者掌握有难度,调动学生的学习兴趣和学习积极性就显得非常重要.本文探讨应用型本科非电类工科专业《电工学》的教学内容、教学方法和技巧等,实践表明可以改善教学效果。     

机载新颖连续变焦中波红外光学系统设计

针对制冷式640×512元凝视焦平面阵列探测器,设计了结构紧凑的高性能机械补偿30倍连续变焦光学系统.该系统采用新颖的三组元变倍形式和三次成像方法设计.工作波段为3.7 ~ 4.8 μm,F/# =4,变焦范围750 ~25 mm.首先利用光学设计软件给出了系统的光学外形结构图; 然后,进行了像质评价分析,变焦曲线分析,温度环境适应性分析和冷反射分析; 最后,介绍了该系统应用微扫描成像技术提高分辨率的方法.结果表明,该光学系统在空间频率30 lp/mm处的光学传递函数 ( MTF) 值均接近衍射极限, 弥散斑直径的均方根 ( RMS) 值均小于15 μm.变焦曲线平滑,且移动组最大行程小于71 mm.移动组透镜的轴向移动可完成系统调焦及温度补偿.光学系统满足100 %冷光阑效率,在-40 ~60 ℃温度范围内均有良好的像质.同时,满足新一代机载前视红外( FLIR)系统的要求.     

回转式飞剪位置伺服控制系统

飞剪为横切机组的重要设备,主要用于对钢板进行定尺剪切。论文介绍了回转式飞剪的形式、结构与工作原理。主要分析了飞剪控制策略、剪刃的运动轨迹、位置环节的伺服控制系统算法。