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可重构光学算术逻辑单元芯片研制成功_我的网站

一 |       记者24日从兰州大学获悉，该校物理科学与技术学院田永辉教授团队在光学数字计算领域取得重要进展。

二 | 该团队研制出一种可重构光学算术逻辑单元芯片，将多种逻辑与算术运算集成于同一硬件平台。    Costume designer Smriti Chauhan is one of the creative forces behind Ranveer Singh’s look in Dhurandhar. She says the film’s now-viral bearded avatar was born from months of iterative work, collaboration and a deep integration of costume with hair, makeup, lighting and performance. In an exclusive conversation with Filmfare, Chauhan breaks down the meticulous process, from conceptual sketches to 40-metre salwars and silicon jewellery designed to survive high-octane action.          Region, story and technical precisionChauhan reveals that the idea of a full beard was rooted in the character’s geography and cultural background. “We knew there was going to be a beard because of the region he comes from, what he’s performing and who he is,” she says. The hair and makeup team played a decisive role as well. They dictated the skin tone, lens colour and texture choices that needed to sync with her costume palette. “Costume and hair and makeup cannot be separated,” Chauhan emphasises. “The look comes alive only when all three, costume, HMU and lighting - work in harmony.”Ranveer’s inputs and a sharp eye for detailChauhan was nervous as she met Ranveer Singh for the first time while working on the movie. However, she says that the actor immediately put her at ease. But Singh was far from a passive participant. He dissected materials, cuts and accessories with precision. He’d ask, ‘Why linen? Why not silk? Why this jewellery? Why this structure?’ According to the designer, his questions pushed her to have solid answers.Smriti also shares, “And when you have the answers, it gives you more clarity. So with Ranveer, he ensured that he helps the two of us get clarity on the character. He also added some technical bits. He asked me to add a wire on the collar so that it stays like that when he is moving around.”          Ranveer’s physical transformationOne of the biggest challenges for Chauhan’s team was designing for a body that kept changing. Ranveer bulked up for a portion of the film and then shed weight rapidly for another. “We had to ensure that with every change in his body, the clothes didn’t show that change... The look had to stay consistent,” she shares.The character evolves from a street nobody to someone big. The costumes had to mirror his transformation. Initially, his look is rooted in ruggedness. “So all of this came together working very closely with him. We understood which materials are working the best and which is looking rugged. His entire journey in this film is like that of a nobody becoming somebody, like really big. So that journey itself was grand.”          The nightmare of action-friendly jewelleryLater, as the character rises in stature, accessories become key. Ironically, Chauhan had laughed off Ranveer’s early questions about accessories because of the heavy action sequences. But he persisted. “Cut to the first sequence in the teaser - he is loaded in accessories. I can tell you this, I’ll throw a rug on him and he’ll carry it with perfection. The next thing you know is that we have added so many accessories on him,” she adds.As the film is packed with lengthy action sequences, some shot over 10 to 12 days, Chauhan’s team had to create silicon jewellery that looked real but wouldn’t injure the actor or break under impact. “It was a nightmare but became necessary.”     The Balochi salwar challengeOne of the film’s most technically challenging pieces was the traditional Balochi salwar. The authentic garment uses 30 to 40 metres of fabric, which is impossible for action scenes. Instead, Chauhan’s team created prototypes using 17 to 20 metres. They experimented with fabric weight, fall, pleats and movement. “We kept making so many prototypes. When he wore it, it looked less; when we spread it out, it was huge. Overall, it was a massive learning experience,” she recalls.Months of prep, presentations and look testsThe team spent two to three months preparing Ranveer’s looks. They went through six different presentation decks and multiple iterations for each phase of his journey. Three comprehensive look tests were done even before shooting. Moreover, sudden scheduling changes accelerated everything. “We thought we’d shoot in October, but suddenly the shoot got pulled to July. We were like, ‘What?’ But luckily we had done early homework,” she recalls.The moment Ranveer called her a ‘Rockstar’Chauhan recalls one of her most overwhelming moments when Ranveer looked at the first major look test and told her he’d “never seen this level of detailing.” “Coming from someone who’s worked with the greatest designers worldwide, it meant the world. It pushed me to raise my own bar,” she says.Despite the scale, the pressure and the physicality of the film, Chauhan says Ranveer’s collaborative nature made the process smooth. “He is the best team player I could have asked for. His encouragement, his curiosity, his involvement - everything helped build the character’s world,” she quips.Also Read: Sara Arjun gives Dhurandhar co-star Ranveer Singh a moving tribute as she shares BTS photos。相关成果发表于国际权威期刊《自然·通讯》。

三 |   随着人工智能与数据密集型应用对高速、低时延计算需求的激增，传统电子集成电路正面临摩尔定律放缓、互连带宽受限和功耗持续上升等挑战。集成光子技术凭借大带宽、高速并行处理和低传输时延等优势，为突破电子计算瓶颈提供了重要的技术路径。  基于这一背景，研究团队依托成熟的硅光子集成平台，利用微环调制器体积小、调制速度快、功耗低且易于电控重构的特点，研制出可实现多种逻辑与算术功能动态切换的光学数字计算芯片。团队通过级联微环构建基本逻辑单元，实现了NOT、AND、OR、XOR和XNOR等多种逻辑运算；同时引入波长维度并行处理不同二进制位，使同一硬件架构能够动态切换为2比特加法器、减法器和数值比较器，无需重新设计芯片结构。  芯片基于220纳米硅绝缘体平台制备，每个微环集成载流子耗尽型高速电光调制结构和热调谐单元，可分别完成高速数据加载与工作波长校准。实验结果表明，该系统在20Gbit/s速率下实现了基本逻辑运算及算术功能，计算密度达到528Gbit/s2，能效达12.36fJ/bit。  在此基础上，团队完成了高速数据加密与解密、医学图像水印嵌入和图像差异增强等应用验证，展示了该架构从基础逻辑器件向多功能光学数字计算系统扩展的能力。  田永辉表示，该工作为构建高密度、低功耗、可重构的光子算术逻辑处理芯片提供了新的实现路径，也为光学数字计算在高速信息处理和片上智能计算中的应用奠定了器件基础。（记者颉满斌 通讯员余若怡）。

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