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Updated: Jan 29, 2026

Applications of the Single-probe: Mass Spectrometry Imaging and Single Cell Analysis under Ambient Conditions
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Applications of the Single-probe: Mass Spectrometry Imaging and Single Cell Analysis under Ambient Conditions

Published on: June 14, 2016

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分析各种预测模型的应用价值,用于怀孕期间的附质量:一个单一中心的回顾性研究

Yaning Niu1, Jie Shen1, Jiayi Ding1

  • 1Department of Obstetrics and Gynecology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China.

Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine
|January 28, 2026
PubMed
概括

怀孕期间的副质很少见,大多是良性的. 简单规则 (SR) 和卵巢附报告和数据系统 (O-RADS) 模型在怀孕期间区分良性和恶性质的诊断价值很高.

关键词:
附属物质质量 附属物质质量怀孕 怀孕 怀孕 怀孕 怀孕超声波预测模型的超声波预测模型

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Rotational equilibrium provides a natural framework for defining the center of mass of a system. For a plank balanced on a pivot with two unequal masses, equilibrium is achieved when the net torque about the pivot is zero. Torque is defined as the product of a force and its perpendicular distance from the pivot. When the torques due to all forces cancel, the pivot coincides with the center of mass of the system.For a system composed of several discrete point masses, the center of mass lies at...
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The center of mass is the point at which the total mass of an object can be said to be concentrated. It is a fundamental principle in mechanics and physics that applies to all objects regardless of their shape or size. The center of gravity is the point at which an object’s weight appears to be concentrated and can be used to balance the object perfectly.
The knowledge of the center of mass can also help us to describe and predict the motion of objects. For example, when a ball is thrown...
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Any object that obeys Newton's second law of motion is made up of a large number of infinitesimally small particles. Objects in motion can be as simple as atoms or as complex as gymnasts performing in the Olympics. The motion of such objects is described about a point called the center of mass of the object. The center of mass of an object is a point that acts as if the whole mass is concentrated at that point. The center of mass of an object with a large number of infinitesimally small...
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The equation of motion for a single particle can be expanded to encompass a system of particles consisting of n particles. For any arbitrarily chosen particle within this system, the net force acting upon it is the aggregate of both internal and external forces. Extending this principle to all particles within the system results in the equation of motion for the entire assembly.
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The volume occupied by one mole of a substance is its molar volume. The ideal gas law, PV = nRT,  suggests that the volume of a given quantity of gas and the number of moles in a given volume of gas vary with changes in pressure and temperature. At standard temperature and pressure, or STP (273.15 K and 1 atm), one mole of an ideal gas (regardless of its identity) has a volume of about 22.4 L — this is referred to as the standard molar volume.
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