摘要：The alloying behavior and microstructures of the(CoCrFeNiMn)_(90)M_(10)(M=Al,Hf)high-entropy alloy(HEA)powders fabricated by mechanical alloying were *** CoCrFeNiMn)_(90)Al_(10) powders have duplex solid-solution *** contrast,nanocrystalline HfNi_(3) anchoring in amorphous structures is found in the(CoCrFeNiMn)_(90)Hf_(10) ***(CoCrFeNiMn)_(90)Al_(10) powders show better ferromagnetic behaviors,mainly explained by the facilitated motion of the magnetic domain induced by the coherent interface between duplex *** with our previous work,the rules of forming solid-solution and amorphous phase in as-milled HEA powders are preliminarily *** is found that,compared with the as-cast HEA reported previously,the variation range of mixing enthalpy with atomic size difference of the solid-solution formed in as-milled HEA powders is ***,the variation ranges between mixing enthalpy and entropy with atomic size difference of the amorphous phase in HEA powder become wider than those of high-entropy bulk metallic glass.

摘要：In the realm of optoelectronics, photodetectors play pivotal roles, with applications spanning from high-speed data communication to precise environmental sensing. Despite the advancements, conventional photodetectors grapple with challenges with response speed and dark current. In this study, we present a photodetector based on a lateral MoTe2 p-n junction, defined by a semi-floating ferroelectric gate. The strong ferroelectric fields and the depletion region of the p-n junction in the device are notably compact, which diminish the carrier transit time, thereby enhancing the speed of the photoelectric response. The non-volatile MoTe2 homojunction, under the influence of external gate voltage pulses, can alter the orientation of the intrinsic electric field within the junction. As a photovoltaic detector, it achieves an ultra-low dark current of 20 pA, and a fast photo response of 2 mu s. The spectral response is extended to the shortwave infrared range at 1550 nm. Furthermore, a logic comput & hybull;ing system with light/no light as binary input is designed to convert the current signal to the voltage output. This research not only underscores the versatility of 2D materials in the realm of sophisticated photodetector design but also heralds new avenues for their application in energy-efficient, high-performance optoelectronic devices

摘要：该文将对电流检测节点的组网通信加以研究。首先对射频组网的通信协议（帧格式）进行解析；之后分析设计节点的各功能模块和硬件电路。

摘要：针对水下机械臂的末端轨迹跟踪控制问题,提出一种自适应快速反正切非奇异终端滑模控制器.首先,基于莫里森方程建立考虑水作用效应的水下机械臂动力学模型;其次,结合非奇异终端滑模控制和反正切函数特性,设计一种快速反正切非奇异终端滑模控制器,并基于径向基神经网络预测系统的未知扰动;然后,通过李雅普诺夫理论验证所提控制方法可在有限时间内收敛到期望位置;最后,通过仿真实验验证所提控制方法的有效性.

摘要：复杂地形条件下,基于深度强化学习的无人机编队航迹规划可以完成无人机编队的轨迹寻优,路径长度和环境适应性均优于传统启发式算法,但仍存在训练稳定性不足、规划实时性差等问题.面向领航者-跟随者模式的无人机集群,本文提出了一种基于SPER-TD3算法的无人机编队实时三维航迹规划方法.首先,将基于SumTree的优先经验回放机制融入TD3算法,设计了SPER-TD3算法,确定无人机编队的轨迹;然后,使用基于角度队形控制方法优化跟随者的飞行轨迹,并应用动态轨迹平滑算法优化转向角.为了加快SPER-TD3算法的训练收敛速度和稳定性,解决长时间依赖性问题,设计了结合LSTM、自注意力机制以及多重感知机的网络模型结构.在多种障碍物环境下进行了仿真实验,结果表明,所提方法在轨迹安全覆盖率、飞行路径平滑度、成功率、奖励大小等方面综合表现优于8种主流的深度强化学习算法,其重要性综合评估值比当前方法提升8.5%–72.9%不等,且训练稳定性最佳.

摘要：The Accelerator Driven Sub-critical(ADS)system is a strategic plan to solve the nuclear waste problem for nuclear power plants in ***-energy particle accelerators and colliders contain long strings of superconducting devices,superconducting radio frequency cavities,and magnets,which may require cooling by 2 K superfluid helium(HeliumⅡ).2 K superfluid helium cryogenic system has become a research hot spot in the field of superconducting *** this study,the ADS Injector-I 2 K cryogenic system is examined in *** cryogenic system scheme design,key equipment,and technology design,such as the 2 K Joule–Thomson(J–T)heat exchanger and cryomodules CM1+CM2 design,are examined,in addition to the commissioning and operation of the cryogenic *** ADS Injector-I 2 K cryogenic system is the first 100 W superfluid helium system designed and built independently in *** ADS proton beam reached 10 Me V at 10 m A in July 2016 and 10 Me V at 2 m A in continuous mode in January 2017 and has been operated reliably for over 15,000 h,proving that the design of ADS Injector-I 2 K cryogenic system,the key equipment,and technology research are reasonable,reliable,and meet the *** research into key technologies provides valuable engineering experience that can be helpful for future projects such as CI-ADS(China Initiative Accelerator-Driven System),SHINE(Shanghai High Repetition Rate XFEL and Extreme Light Facility),PAPS(Platform of Advanced Photon Source Technology),and CEPC(Circular Electron-Positron Collider),thereby developing national expertise in the field of superfluid helium cryogenic systems.

摘要：安全问题已经成为现今信息技术在企业应用中要解决的重要问题,本文提出一种设计安全系统的方法框架,这个方法基于面向主体的需求建模框架i*,通过社交概念模型来分析与安全相关的系统的业务和组织环境.这个方法框架把安全分析和一般的软件工程分析方法结合起来,把安全性和系统相关的其他功能性需求和非功能性需求的共同分析,对需求进行权衡,从系统设计的初始阶段起就把安全措施整合进去.本文通过网上购物的实例用i*图示分析了设计过程中的相关步骤.

摘要：介绍了基于关联设计的弯曲级进模结构设计方法,描述了级进模装配约束关系的模型、弯曲工序对象和弯曲模组件对象,提出距离约束、几何约束、尺寸约束、依附约束4种约束方法。详细阐述了级进模弯曲设计中的装配树组织结构、关联设计、约束求解、参数化关键技术,及在此基础上实现的弯曲级进模块的设计流程和实现方法。

摘要：为保证大型发电机组的安全运行,在工程实践经验积累的基础上,有必要对发电机主保护配置方案的定量化设计过程进行归纳总结,以使其更好地服务于工程实践。该文以百色(135MW)、乐滩(150MW)、凤滩(200MW)、瓦屋山(130MW)、彭水(350MW)、拉西瓦(700MW)电站的6台水轮发电机的主保护设计为例,说明奇数多分支水轮发电机主保护的设计过程可归纳为一个每相3分支的水轮发电机主保护配置方案的设计,应立足于如何使用不完全裂相横差保护,即根据发电机实际可能发生的故障特点,舍弃每相某一分支的同时实现对剩余偶数分支的合理分组(相邻或相隔方式);相关设计规则的总结为奇数多分支大型水轮发电机主保护配置方案的定量化设计明确了方向,同时也显著地减少了设计计算的工作量。应用该方法可进一步简化发电机主保护配置方案的定量化设计过程。

摘要：通过分析多分支发电机的2种典型内部故障对不同主保护的灵敏性,从减少相对保护死区的目的出发提出了选择支路分组方式的2条一般性原则。按照这2条原则,在构皮滩、龙滩和紫坪埔发电机的主保护设计中,不需具体计算保护方案的灵敏度就可从众多选择中直接确定最优的支路分组方式,再由优化设计可得到保护动作率最大的最优配置方案,大大节省了设计工作量。分析结果表明,在偶数多分支发电机的主保护配置中,一般应优先考虑分成2个支路组。