Quantum information processing with nitrogen–vacancy centers in diamond

Nitrogen-vacancy （NV） center in diamond is one of the most promising candidates to implement room temperature quantum computing. In this review, we briefly discuss the working principles and recent experimental progresses of this spin qubit. These results focus on understanding and prolonging center spin coherence, steering and probing spin states with dedicated quantum control techniques, and exploiting the quantum nature of these multi-spin systems, such as superposition and entanglement, to demonstrate the superiority of quantum information processing. Those techniques also stimulate the fast development of NV-based quantum sensing, which is an interdisciplinary field with great potential applications.

South China University of fechnology Advanced Metallic Materials Research and Processing Technology Center

A dvanced Metallic Materials Research and Processing Technology Center was found in December 1998. As a unit under The College of Mechanical Engineering, the Center is an expansion of the former Cast and Composite Materials Research Group, which was found in the early eighties of last century. The Center is focusing in the basic and applied research, and development of advanced metallic materials and their processing technology. It also functions as an organization

Tsinghua University Tsinghua-TOYO Research and Development Center of Magnesium and Aluminum Alloys Processing Technology

Tsinghua-TOYO Research and Development Center of Magnesium and Aluminum Alloys Processing Technology was officially established between Tsinghua University and TOYO Machinery & Metal Co. on Feb. 26, 2002, which is a non-independent legal research organization located in Department of Mechanical Engineering of Tsinghua University. The center was equipped with one set of 650t automatic magnesium and aluminum alloys diecasting machine and necessary accessories including the melting furnaces for magnesium alloys and aluminum alloys, an accurate magnesium pump to transfer the magnesium alloys to the shot sleeve of the die casting machine, a die temperature controller, and data logging systems for cavity pressure and die temperature distributions, etc. The center is aimed to the research and development of magnesium and aluminum die casting process and their related technologies, and the main research contents include:

Tool wear condition monitoring method of five-axis machining center based on PSO-CNN

The effective monitoring of tool wear status in the milling process of a five-axis machining center is important for improving product quality and efficiency,so this paper proposes a CNN convolutional neural network model based on the optimization of PSO algorithm to monitor the tool wear status.Firstly,the cutting vibration signals and spindle current signals during the milling process of the five-axis machining center are collected using sensor technology,and the features related to the tool wear status are extracted in the time domain,frequency domain and time-frequency domain to form a feature sample matrix;secondly,the tool wear values corresponding to the above features are measured using an electron microscope and classified into three types:slight wear,normal wear and sharp wear to construct a target Finally,the tool wear sample data set is constructed by using multi-source information fusion technology and input to PSO-CNN model to complete the prediction of tool wear status.The results show that the proposed method can effectively predict the tool wear state with an accuracy of 98.27%;and compared with BP model,CNN model and SVM model,the accuracy indexes are improved by 9.48%,3.44%and 1.72%respectively,which indicates that the PSO-CNN model proposed in this paper has obvious advantages in the field of tool wear state identification.

Analysis of the Reliability Model of the Tool Magazine Subsystem in the Processing Center

Tool magazine is an important part of a processing center.Tool magazines have the advantage of reducing work parts turnover,handling,and storage time.In addition,some research shows that the use of tool magazine in machine tools in the machining center can make the cutting time utilization rate of machine tools 3-4 times higher than that of ordinary machine tools,and has better machining consistency,thus improving processing accuracy and processing efficiency,shortening the production cycle.Therefore,the reliability,efficiency and accuracy of the tool magazine have a crucial impact on the stability of the machine tool.Therefore,the reliability analysis of CNC machine tool magazine is considerably important.In view of this problem,this paper puts forward that the reliability model of the tool magazine is established after the parameter estimation and hypothesis test,and then the maintainability model of the tool magazine is built,it ends with the fault analysis of the tool magazine.

A Review of Energy Efficiency in Data Processing Centers

This article explores, through a case study, measures of energy efficiency in data processing centers. An analysis of this case demonstrates how the design criteria could improve the rate of consumption in IT centers, which is currently the second most contaminating industry on the planet, and is the responsible for 2% of CO2 emissions, surpassed only by the aeronautical industry. The present and future situation of IT center energy consumption and associated environmental effects is analyzed, and also looks at how state-of-the-art technology, correctly implemented, could ensure significant rationalization of data processing center energy consumption. The article will examine optimization techniques, specific problems and case studies.

An Innovative Architectural Strategy for the Integration of Energy Issues into the Design Process of a Commercial Center in Switzerland

In a context of growing efforts to develop sustainability strategies, energy-related issues occupy central stage in the built environment. Thus, the energy performance of housings has improved radically over the past decades. Yet other types of buildings, in particular commercial centers, haven’t received the same level of interest. As a result, there is a need for effective and practical measures to decrease their energy consumption, both for heating and electricity. The objective of the paper is to demonstrate that it is possible, through coherent strategies, to integrate energy issues and bioclimatic principles into the design process of commercial centers. It analyzes the exemplary case study of Marin Commercial Center (Switzerland). The interdisciplinary approach, based on integrated design strategies, aimed at increasing the energy efficiency while keeping the cost comparable to the market cost. The main design principles include natural ventilation, nighttime cooling with energy recovery and natural lighting, as well as optimization of mechanical systems. The results of the simulations show that Marin Center attains the best energy performance observed so far among Swiss commercial centers. It also meets the Swiss Minergie standard. The paper thus questions traditional design processes and outlines the need for interdisciplinary evaluation and monitoring approaches tailored for commercial centers. Even though most crucial decisions are taken during the early stages, all phases of the process require systematic optimization strategies, especially operating stages. Recommendations include legal measures, in particular in the fields of ventilation and air-conditioning, education, professional development and technology transfer, and financial incentives for the replacement of energy intensive installations.

Business Process Analysis and Simulation: The Contact Center of a Public Health and Social Information Office

This article proposes a framework, called BP-M* which includes: 1) a methodology to analyze, engineer, restructure and implement business processes, and 2) a process model that extends the process diagram with the specification of resources that execute the process activities, allocation policies, schedules, times of activities, management of queues in input to the activities and workloads so that the same model can be simulated by a discrete event simulator. The BP-M* framework has been applied to a real case study, a public Contact Center which provides different typologies of answers to users’ requests. The simulation allows to study different system operating scenarios (“What-If” analysis) providing useful information for analysts to evaluate restructuring actions.

马扎克五轴加工中心后处理研究及验证

在制造业飞速发展的今天,产品对零件的结构及精度要求越来越高。传统三轴加工中心无法满足零件加工要求,而五轴联动机床能很好适应复杂零件的加工工艺。然而,机床厂家并不会免费提供该设备的专用后处理,这给机床使用人员带来了极大困难,同时也浪费了人力成本和时间成本。这里针对马扎克五轴加工中心,运用Tcl脚本语言在UG/Post环境中编制适合该机床的后处理系统。该系统能有效读取刀位文件,并且按照机床要求生成相应加工程序,该程序能安全有效地运行于马扎克VARIAXIS j-500/5X机床。最后通过加工检测五轴联动机床的S试件证明了该后处理系统的有效性和安全性。

基于“以学生为中心”理念的制药过程安全与环保课程改革

本文旨在探讨在以学生为中心的教学理念下对制药过程安全与环保课程进行改革的方法与策略。主要包括课程内容的改革与创新,建立课程案例库以及开发和积累新型教材。通过设计课程内容和教学体系,建立案例库,并总结过去年份的制药行业安全事故,以提高课程的实用性和针对性。

融入OBE理念的专业基础课程教学改革与实践——基于“材料成型工艺基础”课程的探索

本课程教学改革立足新工科建设,以工程教育为导向,结合学校“航空特色鲜明,工科优势突出”的办学定位,坚持以学生为中心,利用现代信息技术手段,基于OBE理念采用启发式、任务驱动式、问题探究式等多种教学方法,旨在提高课程目标达成度。通过对近3年材料成型与控制工程专业本科生成绩分析,着眼于解决目前课程体系同质化、教学方法单一化、课程质量不高的问题,促进形成“夯实基础、强化实践、学研结合、突出创新”的课程教学定位。实现课程资源共享及师生交流互动,达到丰富教学内容、优化教学过程设计、增加教学过程吸引力、培养学生创新意识的目的。

电主轴热补偿及轴承故障检测在热辐射测温方面的研究

针对电主轴轴体的热变形以及重要零部件轴承在加工中心上的常见故障,提出基于收集电主轴温度变化的热误差实时补偿计算方法与轴承常见故障的诊断方法。热误差补偿方法可以通过对轴体上测温点数据的处理对电主轴单元进行实时的热误差补偿提高加工精度。故障诊断方法是对不同的温度节点设置不同的阈值,阈值对应着电主轴单元内部某些重要零件的故障特征,当节点温度变化超出阈值即进行报警以诊断具体零件的故障。促进了电主轴的智能化进程,为接下来的研究打下基础。

以学生发展为中心的信号与系统课程全程考评体系建设

课程考核评价是激发学生主动学习、检测学生学习成果产出、保证人才培养质量的重要手段。针对信号与系统课程考评中存在的考评设置不够科学、覆盖面不够宽、不能与时俱进等痛点问题,该文依托信号与系统I山东省线下一流本科课程建设,更新设计理念,以学生发展为中心,按OBE模式详细创新设计考评定位、考评目标、考评方案、考评实施、考评评价和考评反思6个环节,建立该课程全过程、闭环、持续改进的考核评价体系,对学生知识学习、能力培养和价值塑造进行全程综合考评。实践证明,该考评体系公平全面,有效提高教学质量,达到预期目标。

采用云重心评判法的港口船舶溢油综合应急能力评价

为突破单环节评价港口船舶溢油应急能力的局限性,合理配置资源,采用云重心评判法全环节评估港口船舶溢油综合应急能力,面向应急准备、预警、行动、恢复全环节,参照人-机-环境-管理系统理论和国际国内规定,建立综合应急能力评价指标体系;针对传统评价指标因素未涉及模糊性和随机性的问题,用加权偏离度确定定性指标与定量数值间的转化关系;利用层次分析法(AHP)优化评价意见,弥补评价样本欠充分带来的精度缺陷;最后,以上海港为例,对船舶溢油综合应急能力评价作实证研究。结果表明:云重心评判法能合理评价港口船舶溢油综合应急能力,为健全和完备应急能力提供理论依据,为港口船舶溢油综合应急能力评价提供了一种新思路。

考虑特性分类批处理负荷可调节能力的数据中心微网灵活性设备分布鲁棒容量配置方法

微网灵活性设备主要用于平抑源荷两侧的波动,其容量配置方法应考虑源荷不确定性的影响,而含数据中心微网的灵活性设备容量配置方法还应进一步考虑数据中心负荷的可调节特性。考虑数据中心批处理负荷的可调节能力和源荷不确定性因素,提出一种灵活性设备容量配置方法。根据负荷特性的不同,将批处理负荷划分为2类以更加准确地量化其可调节能力,一类为带宽时序可变限时可平移负荷,另一类为带宽时序不变可中断平移负荷,对这2类批处理负荷进行详细分析并给出一般性的建模方法;构建数据驱动下的min-max-min两阶段分布鲁棒优化容量配置模型,利用1-范数和∞-范数约束场景概率分布模糊集,采用列和约束生成算法对该模型进行化简求解。对某省数据中心微网进行算例分析,验证了所提方法的有效性。

供应流程优化管理对消毒供应中心器械清洗消毒及包装质量的影响

目的探究供应流程优化管理对提高消毒供应中心器械清洗消毒剂包装质量的作用。方法选取2021年1月—2023年12月济南市市中区人民医院消毒供应中心的10名工作人员为研究对象。2021年1月—2022年6月记为参照组,2022年7月—2023年12月记为研究组。参照组行一般管理方法,研究组加用供应流程优化管理。比较两组的操作合格情况、器械不合格情况、工作人员工作质量及工作人员工作满意度。结果研究组灭菌、洗涤、包装及发放合格率均高于参照组,差异有统计学意义(P均<0.05)。研究组器械缺失、标签错误、包装错误及有效期错误发生率低于参照组,差异有统计学意义(P均<0.05)。研究组工作人员工作积极性、工作责任心、专业知识及技能操作评分均高于参照组,差异有统计学意义(P均<0.05)。研究组工作人员服务态度、需求满足、器械质量及回收发放满意度评分均高于参照组,差异有统计学意义(P均<0.05)。结论供应流程优化管理能够提高消毒供应中工作人员操作合格率,降低器械不合格率,提高工作人员工作质量及工作满意度。

钢铁物流中心平面布局研究

钢铁物流中心将物流的各个环节连接在一起,科学合理地布局钢铁物流中心,对于促进物流中心内各项物流活动高效运作、降低物流成本、提升物流服务质量具有重要意义。结合钢铁物流的特点,研究了钢铁物流中心的功能分区和作业流程,提出适合钢铁物流中心平面布局的原则。根据铁路装卸线是否进入仓库,以及库内桥吊与铁路装卸线的相对关系不同,研究了铁路布置在库外和库内、桥吊垂直和平行铁路布置等4种平面布局方案,并给出了不同布局方案的适用场景。最后结合长沙北货场钢铁物流中心实例,对钢铁物流中心平面布局进行说明,对钢铁物流中心的规划和设计具有一定的参考意义。

云计算中心的高效地震处理解释能力体系建设与工业化应用

随着云计算中心硬件环境的建立,如何充分利用云中心的计算、存储和网络基础设施环境建立高效的地震处理解释能力体系,从而实现地震处理解释新技术的大规模推广与工业化应用成为必须解决的问题。文章将重点介绍如何利用云计算中心的基础设施环境,建设高效地震处理解释能力体系。

中国式现代化中的全过程人民民主

人民民主是全面建设社会主义现代化国家的应有之义,全过程人民民主是社会主义民主政治的本质属性,发展全过程人民民主是中国式现代化的本质要求。在全面建设社会主义现代化国家开局起步的关键时期,发展全过程人民民主具有重大意义和特殊功能。坚持以人民为中心发展全过程人民民主,可以切实保障人民在现代化进程中当家作主的主体地位;坚持以问题为导向发展全过程人民民主,可以不断满足人民在现代化进程中日益增长的美好生活需要;坚持以制度为保障发展全过程人民民主,可以充分释放制度现代化促进高质量发展的国家治理效能。因此,扎实推进全过程人民民主,必将有力拓展和保障以中国式现代化全面推进中华民族伟大复兴的历史进程。

医疗卫生数据处理过程中的关键问题研究与实例分析

目的聚焦医疗卫生数据处理过程中的关键问题,研究科学的数据处理方法与设计理念,保证数据处理全过程的数据质量。方法通过文献查阅,提出数据处理各阶段应采用的方法要点,并以上海市医疗机构实验室检测数据为例,探索数据处理全过程的各个要点。结果本研究提出的数据处理要点在数据汇聚、清洗、转换、再整理阶段有效保证了数据的准确性、完整性和一致性。结论在数据处理过程中,应合理区分数据处理的各个阶段,保留各阶段数据集,并进行科学、严谨的数据质量控制,及时发现数据问题,为后续医疗卫生的研究应用及政策决策奠定基础。