基于椭圆曲线离散对数问题，纪家慧和李大兴提出了一个代理签名方案和一个代理多签名方案，陈泽雄等人给出了另外两个代理多签名方案。
Based on the elliptic curve discrete logarithm problem, Ji and Li proposed a proxy signature scheme and a proxy multi-signature scheme and Chen et al. proposed two proxy multi-signature schemes.
为了这一“新”的技术创造，陈劭雄拍摄了三百张描绘城市居民生活以及广州街道的水墨速写。
For this "new" kind of technique Chen filmed about three hundred ink drawings depicting the life of city-dwellers, as well as the streets of Guangzhou.
陈劭雄的这些图片作品，源自他今年的一个观念艺术项目“信则有”。
These photo works by Chen Shaoxiong are inspired by his conceptual art project "Seeing is Believing".
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