The new electric hot turning principle and experimental verification

随着现代工业技术的迅速发展，在兵器、航空、机械制造等部门引入了很多 高强度、高硬度以及耐高温的难加工材料，这些材料有的强度大、硬度高，有的 材料塑性大，在切削加工过程中随之出现大切削力、低材料去除率、高温升、加 工硬化等现象，因而造成严重的刀具磨损、加工精度和表面质量难以保证等问题， 有的甚至无法加工。用常规的加工方法、常规的刀具材料很难对材料进行切削加 工，满足现代工业技术要求。 加热切削是对难加工材料进行切削的一种有效方法，本文提出了一种新的导 电加热车削方法及其加热模型，旨在探究其可行性及效果。导电加热车削通过电 源、加热电极、工件构成回路，在回路中通以低压大电流，电流流...Along with the rapid development of modern industrial production, a lot of difficult—to—cut material which has high strength and high hardness or has high temperature resistance has been introduced in many departments such as weapon manufacture, aerospace industry and other machinery industry, in the process of machining there are problems such as bigger cutting force, lower material removal ...学位：工学硕士院系专业：物理与机电工程学院_航空宇航制造工程学号：3202011115272

The Principle of Electric Hot Milling and Its Experimental Verification

提出了一种通电加热铣削方法,介绍了其基本原理与实验装置。通过试验及分析用小波变换处理采集到的振动信号来证明这种方法能够大幅降低切削过程的振动,提高刀具寿命,降低表面粗糙度,并且成本低、实验装置简单实用。提出了一种基于通电加热的新型高温硬度测量方法,用该方法分析淬火钢在高温下的硬度变化情况,发现常温57HrC的淬火T10A工具钢在300℃左右,硬度就急剧降低至30HrC,这也证明了加热切削的有效性。A new electric hot milling method is proposed firstly,and then this paper has proposed the theory and the experimental device of the new method.It has been proved by experiment and analyzing the vibration signal processed by wavelet transform on the new method that it really can significantly reduce the vibration and increase the tool life in milling process.And it also can reduce the surface roughness of the material.Besides,the device is not only cheap but also simple and practical.A new high-temperature hardness measurement method based on electric hot technology is proposed.The change of hardness at high temperature of the hardened steel has been analyzed.The hardness of T10 A carbon tool steel which has been hardened is nearly 57 HRC in normal atmospheric temperature,but the hardness drastically reduce to hardness 30 HRC when the material is heated to 300 ℃.So the efficiency of the new electric hot milling method has also been proved.国家自然科学基金项目(50875120)资

利用导电涂膜直接电解海水法防护生物腐蚀 1.模拟和测量技术

基于电化 学微探针 和微弱 信号检测 技术， 采用 四电 极体 系、双恒 电 位仪、锁相 相 关测定系统 以及三维 微调装 置建立模 拟和测量 系统，将 首次实 现对利 用导 电涂 膜直 接电 解海 水法 防护生物腐 蚀中微 米尺度内 痕量 Ｃｌ Ｏ － 浓度 的测量．本 文报道 了模拟和 测量实验 的阶段 性进展

Electrochemical Gating Single-Molecule Circuits with Parallel Paths

# These authors contributed equally to this work.电化学门控已成为一种可行且高效调节单分子电导的方法。在本研究中,我们证实了具有两个平行苯环的单分子电路中电子传输可以通过电化学门控控制。首先,我们利用STM-BJ技术以金为电极构筑了具有两条平行路径的单分子结。与单条路径的单分子结相比,两条路径的分子结由于具有增强性量子干涉效应,具有2.82倍的电导值。进一步地,我们利用电化学门控对具有两个平行苯环的单分结的电导进行调控,获得了333%·V-1调节比。结合DFT计算,发现在E=EF附近的V形透射系数谱图导致了实验观测的电导门控行为。本研究揭示了具有平行路径的单分子电路的电化学门控行为,并为设计高性能分子器件的分子材料提供了新的途径。通讯作者:周小顺E-mail:[email protected]:Xiao-ShunZhouE-mail:[email protected].浙江师范大学物理化学研究所,先进催化材料教育部重点实验室,浙江 金华 3210042.上海大学物理系,上海 2004441. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, Zhejiang, China2. Department of Physics, Shanghai University, Shanghai 200444, Chin

Direct Electrolysis of Seawater on Conducting Film for Microbial Anticorrosion 1. Simulation and Measurement Technique

基于电化 学微探针 和微弱 信号检测 技术， 采用 四电 极体 系、双恒 电 位仪、锁相 相 关测定系统 以及三维 微调装 置建立模 拟和测量 系统，将 首次实 现对利 用导 电涂 膜直 接电 解海 水法 防护生物腐 蚀中微 米尺度内 痕量 Cl O - 浓度 的测量.本 文报道 了模拟和 测量实验 的阶段 性进展.Based on the electrochemical micro probe and the weak signal detection technique, simulated test and measurement system were set up by the use of four_electrode cell(including a micro electrode), bipotentiostat, lock_in amplifier and three_dimensional micro manipulating device.Based on the system, the micrometer scale concentration distribution of trace hypochlorite, which is produced by direct electrolysis of seawater on the conducting film for preventing microbial corrosion has been obtained for the first time.Both relationships between concentration of hypochlorite and its reduction current, which is termed an working curve, and between the reduction current of hypochlorite and measured time are reported.船舶工业总公司七二五所厦门分部的资

Direct Electrolysis of Seawater on Conducting Film for Microbial Anticorrosion 1. Simulation and Measurement Technique

基于电化 学微探针 和微弱 信号检测 技术， 采用 四电 极体 系、双恒 电 位仪、锁相 相 关测定系统 以及三维 微调装 置建立模 拟和测量 系统，将 首次实 现对利 用导 电涂 膜直 接电 解海 水法 防护生物腐 蚀中微 米尺度内 痕量 Ｃｌ Ｏ － 浓度 的测量．本 文报道 了模拟和 测量实验 的阶段 性进展．Based on the electrochemical micro probe and the weak signal detection technique, simulated test and measurement system were set up by the use of four_electrode cell(including a micro electrode), bipotentiostat, lock_in amplifier and three_dimensional micro manipulating device. Based on the system, the micrometer scale concentration distribution of trace hypochlorite, which is produced by direct electrolysis of seawater on the conducting film for preventing microbial corrosion has been obtained for the first time. Both relationships between concentration of hypochlorite and its reduction current, which is termed an working curve, and between the reduction current of hypochlorite and measured time are reported.作者联系地址：固体表面物理化学国家重点实验室!厦门大学化学系物理化学所厦门361005,固体表面物理化学国家重点实验室!厦门大学化学系物理化学所厦门361005,固体表面物理化学国家重点实验室!厦门大学化学系物理化学所厦门361005,固体表面物理化学国家重点实验室!厦门大学化学系物理化学所厦Author's Address: State Key Lab. for Phys. Chem. of the Solid Surf., Dept. of Chem., Ins. of Phys. Chem., Xiamen Univ., Xiamen 36100

重组人凝血因子Ⅷ治疗411例中重型血友病A患者的抑制物产生及安全性的回顾性分析

目的:分析国内血友病A患者接受第3代重组人凝血因子Ⅷ(FⅧ)替代治疗后FⅧ抑制物产生和相关安全性情况。方法:对411例重型和中型血友病A患者进行回顾性分析。结果:411例血友病A患者均为男性,46例仅接受百因止治疗,包括18例既往未接受过FⅧ治疗(PUP)和28例既往接受过FⅧ治疗(PTP);365例接受百因止与其他FⅧ制剂治疗,包括9例PUP和356例PTP。411例患者中13例(3.2%)报告了抑制物产生阳性,包括27例PUP中的3例(11.1%)和384例PTP中的10例(2.6%)。在365例接受百因止与其他FⅧ制剂治疗的患者中,分别有7例(1.9%)、36例(9.9%)和11(3.0%)报告了乙肝表面抗原阳性、乙肝表面抗体阳性和丙肝表面抗体阳性,同时有9例(2.5%)和1例(0.3%)报告了人类免疫缺陷病毒抗体和梅毒螺旋体抗体阳性。在46例仅接受百因止治疗的患者中,未见病毒学阳性结果。结论:中国血友病A患者接受百因止替代治疗总体安全且耐受性良好,抑制物发生率较低

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies