查询词典 directed group

The main results obtained are as follows:(1)A new multisignature scheme for specified group of verifiers is proposed;(2) A new signature scheme with threshold shred verification is proposed. Based on the proposed scheme, a new password shared authentication scheme is presented to repair the security flaw in Qi et als scheme;(3) We point out some weaknesses of two directed signature scheme proposed by Lim et al.

作者取得的主要研究成果如下：(1)提出一个新的针对指定接收组的多重签名方案；(2)提出一个新的门限共享验证签名方案，并设计了一个新的口令共享认证方案，该方案可以弥补祁明等的方案的不足；(3)指出Lim et al。

He was music director of the Renaud-Barrault theater company 1946-56. Inspired by the works of A. Webern, he began to experiment with total serialism in 1951. He founded the new-music group Domaine Musical in 1954 and directed it until 1967. He was conductor of the New York Philharmonic 1971-78. He conducted Richard Wagner's Ring at Bayreuth in 1976 and the premiere of the completed version of A. Berg's Lulu in 1979. In 1974 he founded the French national experimental studio IRCAM.

受魏本作品的激励，1951年开始以完全的序列主义实验创作音乐。1954年创办新音乐团体「音乐天地」，并持续指挥至1967年。1971-1978年任纽约交响乐团指挥。1976年在拜罗伊特音乐节指挥华格纳的《尼贝龙的指环》，1979年初次公演贝尔格的歌剧《露露》完整版。1974年创建法国国家实验工作室IRCAM（音乐与音响协调研究学会）。

In the first part, study 1 was designed to investigate the development of the science inquiry ability in the group of the primary and secondary School student, and how the task difficulty affects science inquiry. We used the self-directed, computer simulated inquiry task, namely pendulum and string task It required the subjects to find the factors that affected the swing frequency of the pendulum and the level of stretch of the string. To evaluate the ability of science inquiry, we analyzed subjects'experiment-design strategies, evidence-evaluation strategies, and results of inference.

实证研究分两部分，第一部分即研究一，采用计算机模拟的自我指导实验探究任务，任务内容为单摆实验和弹簧实验，要求被试自主探究影响单摆摆动频率和弹簧伸拉长度的因素，并以科学探究的全过程为研究对象，以被试探究中的实验设计策略水平、证据评价策略水平以及正确推论结果作为衡量科学探究的指标，系统探讨了小学高年级和初中学生科学探究的特点。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。