Cerebrovascular disease not only to regional hemodynamics but also regarding oxygen tension within this discerning cerebral milieu. The present investigation introduces a noninvasive monitoring system synergizing inductive sensing and near-infrared spectroscopy techniques to enable real-time assessment encompassing dual modalities: cerebral blood flow and brain oxygen saturation. We observed a compelling congruence between fluctuations within cerebral blood flow frequencies and corresponding oscillations detected via finger pulse measurements. Moreover, this investigation successfully unveiled an inherent association linking alterations discerned in fingertip blood oxygen levels with relative variations of parameter Q captured. These results present valuable solutions for personalized treatment management of cerebrovascular disease.

In this paper, an acoustic-electric combined detection method is proposed based on the acoustic and electrical signals of partial discharge. Firstly, based on the comparative analysis of ultra-high frequency and ultrasonic methods, a comprehensive detection scheme including ultra-high frequency sensor, ultrasonic sensor and high frequency current sensor is constructed, and the corresponding parameters of the sensor are set. Secondly, the acoustic-electric combined positioning method based on bisector method positioning and time difference positioning is proposed. Finally, through case analysis, the acoustic-electric combined detection method can quickly locate the discharge position, which verifies the effectiveness of this method.

Abstract Cerebrovascular autoregulation function is the mechanism ensuring the maintenance of constant cerebral blood flow by adjusting the caliber of cerebral vessels. It is important to have an effective noncontact tool for assessment and monitoring of the function in patients with acute ischemic stroke. The adjustment of intracranial arteriole caliber leads to changes in the conductivity of entire brain by relative changes in cerebral blood volume. Here, the electrical properties measurement of entire brain by magnetic induction phase shift with two contactless coils placed across the head is a valuable alternative to assess the function. Then, we proposed the correlation coefficient between spontaneous slow oscillations in arterial blood pressure and corresponding slow spontaneous oscillations in magnetic induction phase shift as a new index called conductivity reactivity index. The novel index is preliminarily confirmed the feasibility to monitor cerebrovascular autoregulation function after ischemic stroke on the animal experience. It has the potential to be used for noncontact, global, deep, bedside and real-time assessment of cerebrovascular autoregulation function of patients with cerebral ischemic stroke.

随着当前科学技术的不断优化,各个领域的发展都在技术的支持下得到巨大发展.人们的生活质量水平也不断提高,汽车的使用数量也随之水涨船高.然而在汽车的使用过程中,比较容易出现故障,影响人们的正常使用,因此汽车故障诊断技术的高低,就影响着汽车故障的及时诊断和实际的解决.文章主要就汽车故障诊断技术的发展和技术特征加以分析,然后结合实际对汽车故障诊断的主要技术和发展趋势进行详细探究.