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相关概念视频

Elements of Block Diagrams01:25

Elements of Block Diagrams

651
Block diagrams serve as a visual representation of the input-output relationships within a system. An illustrative example is a heating system, where the set temperature activates the furnace to warm the room to the desired level. Block diagrams are versatile, modeling linear systems through Laplace transform variables and nonlinear systems using time domain variables.
A block diagram typically includes essential elements such as comparators, blocks, and feedback loops. Each of these elements...
651
Block Diagram Reduction01:22

Block Diagram Reduction

501
The process of deriving the transfer function of a control system often involves reducing its block diagram to a single block. This simplification can be achieved through a series of strategic operations, including relocating branch points and comparators. These operations preserve the overall function of the system while allowing for easier manipulation and combination of blocks.
The first step in this process is the identification and relocation of a branch point. A branch point, where a...
501
Simplified Synchronous Machine Model01:30

Simplified Synchronous Machine Model

733
The Synchronous Machine Model is a fundamental tool in analyzing and ensuring the transient stability of power systems. This model simplifies the representation of a synchronous machine under balanced three-phase positive-sequence conditions, assuming constant excitation and ignoring losses and saturation. The model is pivotal for understanding the behavior of synchronous generators connected to a power grid, particularly during transient events.
In this model, each generator is connected to a...
733
Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

6.7K
The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
6.7K
Assembly of Signaling Complexes01:30

Assembly of Signaling Complexes

6.4K
Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
6.4K
Source Transformation for AC Circuits01:11

Source Transformation for AC Circuits

1.0K
The process of source transformation in the frequency domain entails the conversion of a voltage source, positioned in series with an impedance, into a current source that is parallel to an impedance, or the other way around. It is essential to maintain the following relationships while transitioning from one source type to another.
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相关实验视频

Updated: Jan 10, 2026

Author Spotlight: Development of an Automated Camera-Based System for Real-Time Blast Overpressure Monitoring and TBI Risk Assessment in Military Training
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基于代码级外部组件树的SBOM生成

Xianglong Kong1, Hangyi Zhuo2,3, Xinyuan Miao2

  • 1Purple Mountain Laboratories, Nanjing, 211111, China. xlkong@seu.edu.cn.

Scientific reports
|November 23, 2025
PubMed
概括

本研究介绍了一种基于源代码的方法,用于生成准确的软件材料清单 (SBOM),有效地解决膨胀的依赖关系. 新方法实现了99.8%的召回率,最大限度地减少了对实际软件依赖的遗漏,以提高供应链安全性.

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A Rapid Method for Modeling a Variable Cycle Engine
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科学领域:

  • 计算机科学 计算机科学
  • 软件工程 软件工程 软件工程
  • 网络安全 网络安全

背景情况:

  • 软件供应链安全需要准确的软件材料单 (SBOM).
  • 当前的SBOM生成方法通常依赖于依赖管理文件,导致诸如膨胀或丢失的依赖等问题.
  • 这些不准确性会影响SBOM安全性和合规性的有效性.

研究的目的:

  • 提出一种基于源代码的新方法来生成准确的SBOMs.
  • 解决现有的SBOM生成方法的局限性,特别是膨胀和缺失的依赖关系.
  • 在SBOM中识别并仅包括实际使用的外部组件.

主要方法:

  • 引入了外部组件树 (ECT) 结构,以组织代码级依赖声明.
  • 开发了三个过器来删除原生,项目特定和未使用的外部组件.
  • 应用了子树修剪算法,从复杂的依赖层次结构中提取代表组件.
  • 在Java,Python和Scala的30个开源项目的方法进行了评估.

主要成果:

  • 为所有评估的项目生成正确的SBOM,有效地解决膨胀的依赖关系.
  • 实现了99.8%的回忆率,这是比较工具 (CycloneDX-Generator,OpenRewrite,Build-Info-Go,微软SBOM-Tool) 中最高的.
  • 展示了对实际软件依赖性的最小遗漏,表明了高准确性.

结论:

  • 基于源代码的SBOM生成方法显著提高了准确性和可靠性.
  • 外部组件树 (ECT) 和过机制有效地处理复杂的依赖结构.
  • 这种方法为准确的SBOM生成提供了强大的解决方案,增强了软件供应链安全性.