LoRa多跳中继技术通过节点间数据转发扩展通信范围,在农业监测、地质灾害预警等场景中展现出显著优势。然而,这种技术架构的扩展性背后,隐藏着时延累积、电池寿命衰减与网络容量下降等多重代价。当多跳中继从实验室走向规模化应用时,这些隐形代价逐渐成为制约系统可靠性的关键因素。
智慧城市与工业物联网的深度融合,地下车库、电梯等封闭空间的通信盲区正成为制约物联网应用落地的关键瓶颈。LoRa与NB-IoT作为低功耗广域网(LPWAN)的两大主流技术,通过双模融合实现优势互补,为地下空间通信提供了从信号穿透到冗余备份的完整解决方案。这种技术融合不仅解决了单一协议的覆盖缺陷,更开创了物联网通信可靠性的新范式。
半导体技术持续向纳米尺度推进的过程,晶体管结构的创新成为突破物理极限的关键。从FinFET到GAA(全环绕栅极)晶体管的技术迭代,本质上是对量子隧穿效应、短沟道效应等微观物理现象的主动应对。GAA晶体管通过纳米片或纳米线结构实现栅极对沟道的四面包裹,而FinFET则依赖三维鳍片结构抑制漏电流。两者在技术路径上的差异,折射出半导体行业在追求更高集成度与更低功耗过程中面临的深层挑战。
在半导体技术持续向纳米尺度推进的过程中,晶体管结构的创新成为突破物理极限的关键。从FinFET到GAA(全环绕栅极)晶体管的技术迭代,本质上是对量子隧穿效应、短沟道效应等微观物理现象的主动应对。GAA晶体管通过纳米片或纳米线结构实现栅极对沟道的四面包裹,而FinFET则依赖三维鳍片结构抑制漏电流。两者在技术路径上的差异,折射出半导体行业在追求更高集成度与更低功耗过程中面临的深层挑战。
C语言因其高效性和底层控制能力被广泛应用于系统编程,但其缺乏内置的边界检查和类型安全机制,使得输入验证成为保障程序安全的核心环节。从格式化字符串漏洞到整数溢出攻击,未经严格验证的输入可能导致缓冲区溢出、权限提升甚至远程代码执行。本文将从格式化字符串漏洞、整数溢出风险、以及输入验证的通用策略三个层面,深入探讨C语言中输入验证的关键技术与实践。
C语言因直接操作内存和高效性被广泛应用于系统级开发,但其缺乏边界检查的机制导致整数溢出成为安全漏洞的高发区。从符号转换漏洞到无符号整数(unsigned)绕过安全检查,攻击者通过精心构造的输入触发溢出,进而实现缓冲区溢出、权限提升甚至远程代码执行。本文结合典型漏洞案例,深入剖析整数溢出的攻击原理与防御策略。
6 月 5 日,市场研究机构 Omdia 发布最新报告指出,在人工智能技术的深度赋能下,全球 6G 网络商业化进程显著提速,预计 2027 年至 2030 年将成为 6G 技术的导入期,并于 2037 年起成为通信领域的主导技术。
据路透社援引研究公司Emarketer的数据报道,美国AI驱动的搜索广告支出预计到2029年将接近260亿美元,占总搜索支出的比达到13.6%。
在PCB打样过程中,层叠结构的设计是至关重要的环节。它不仅关系到PCB的性能和稳定性,还直接影响到生产成本和制造周期。本文将从PCB的两个重要组成部分Core和Prepreg(半固态片,简称PP)出发,深入探讨PCB多层板的层叠结构设计的先决条件。
The EVLSPIN32G4-ACT edge AI motor drive reference design simplifies the creation of smart actuators. This design is based on the STSPIN32G4, a 3-phase motor driver for advanced motor control systems. It is designed to work with ST's STWIN.box (STEVAL-STWINBX1), a wireless industrial sensor node, to fast-track the development of systems that merge precise motor control with real-time environmental data analysis and IoT connectivity.
The EVLDRIVE101-HPD (High Power Density) motor-drive reference design packs a 3-phase gate driver, STM32G0 microcontroller, and 750W power stage on a circular PCB just 50mm in diameter. The board features extremely low power consumption in sleep mode, below 1uA, and its tiny outline can fit directly in equipment like hairdryers, handheld vacuums, power tools, and fans. It also fits easily into drones, robots, and drives for industrial equipment such as pumps and process-automation systems.
ST’s STSPIN32 drivers combine a general-purpose STM32 microcontroller (MCU) with a feature-rich three-phase gate driver to simplify design, save PCB area and accelerate time to market. The eight new STSPIN32G0 devices contain gate drivers rated 45V, 250V and 600V, targeting applications from battery-operated appliances and power tools to industrial automation, robots, HVAC systems and line-powered home appliances.
The EVLSERVO1 servo driver reference design from STMicroelectronics offers a highly compact solution specifically engineered for high-power motor-control applications, providing designers with a turnkey platform to explore, develop, and prototype without compromises.
Accelerating development of compact and reliable fans and pumps built with energy-efficient motors, STMicroelectronics has introduced the PWD5T60 three-phase driver with a ready-to-use evaluation board that supports flexible control strategies.