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相关概念视频

Cross Product01:25

Cross Product

249
The cross product is a fundamental concept in vector algebra that is a vector operation on two different vectors to obtain a third vector. Unlike the scalar product, the cross product results in a vector quantity perpendicular to both the original vectors.
The magnitude of the cross product is obtained by multiplying the magnitude of both the vectors and the sine of the angle between them. This means that a larger angle between the vectors will lead to a greater magnitude of the cross product.
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Cross-reactivity00:42

Cross-reactivity

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Overview
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Collisions in Multiple Dimensions: Problem Solving01:06

Collisions in Multiple Dimensions: Problem Solving

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In multiple dimensions, the conservation of momentum applies in each direction independently. Hence, to solve collisions in multiple dimensions, we should write down the momentum conservation in each direction separately. To help understand collisions in multiple dimensions, consider an example.
A small car of mass 1,200 kg traveling east at 60 km/h collides at an intersection with a truck of mass 3,000 kg traveling due north at 40 km/h. The two vehicles are locked together. What is the...
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The Representativeness Heuristic02:13

The Representativeness Heuristic

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The representative heuristic describes a biased way of thinking, in which you unintentionally stereotype someone or something. For example, you may assume that your professors spend their free time reading books and engaging in intellectual conversation, because the idea of them spending their time playing volleyball or visiting an amusement park does not fit in with your stereotypes of professors.
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Collisions in Multiple Dimensions: Introduction01:05

Collisions in Multiple Dimensions: Introduction

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It is far more common for collisions to occur in two dimensions; that is, the initial velocity vectors are neither parallel nor antiparallel to each other. Let's see what complications arise from this. The first idea is that momentum is a vector. Like all vectors, it can be expressed as a sum of perpendicular components (usually, though not always, an x-component and a y-component, and a z-component if necessary). Thus, when the statement of conservation of momentum is written for a...
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Crossing Over01:30

Crossing Over

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Crossing over is the exchange of genetic information between homologous chromosomes during prophase I of meiosis I. Genetic recombination gives rise to allelic diversity in the newly formed daughter cells. In humans, crossing over produces genetically distinct haploid egg and sperm cells that undergo fertilization to produce unique offspring. Before cell division starts, the germ cell’s chromosome(s) undergo duplication in the S phase of the cell cycle. As the cells enter prophase I,...
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相关实验视频

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Cross-Modal Multivariate Pattern Analysis
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基于语义嵌入的在线交叉模式哈希方法

Meijia Zhang1,2, Junzheng Li3, Xiyuan Zheng4

  • 1School of Data Science and Computer Science, Shandong Women's University, Jinan, 250300, China.

Scientific reports
|January 6, 2024
PubMed
概括
此摘要是机器生成的。

本研究介绍了基于语义嵌入的在线交叉模拟哈希 (SEOCH) 以实现高效的流媒体数据检索. 通过利用语义信息和在线交叉模式哈希的离散优化,SEOCH提高了准确性.

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科学领域:

  • 计算机科学 计算机科学
  • 信息检索 信息检索
  • 机器学习 机器学习

背景情况:

  • 在大规模的高维数据中,哈希对于高效的交叉模式检索至关重要.
  • 现有的线下哈希方法在数据流中扎,而当前的在线方法缺乏语义集成和离散优化.

研究的目的:

  • 开发一种高效准确的在线交叉模式散列方法,用于数据流.
  • 通过整合语义信息和离散优化来增强跨模式检索.

主要方法:

  • 拟议的基于语义嵌入的在线交叉模式哈希 (SEOCH) 方法.
  • 将语义标签映射到潜伏的语义空间,并构建一个语义相似性矩阵.
  • 采用离散优化策略,以提高散列效率.

主要成果:

  • SEOCH有效地利用语义信息来改善跨模式检索.
  • 离散优化策略提高了在线散列的效率.
  • 实验结果表明SEOCH在多标签数据集上的现有方法上的优越性.

结论:

  • SEOCH提供了一种优越的在线交叉模式哈希处理方法,用于数据流.
  • 整合语义嵌入和离散优化解决了先前在线方法的局限性.
  • 拟议的方法在跨模式的检索任务中实现了高精度和高效率.