Optical sensor array for the discrimination of liquors

The discrimination of liquors plays a vital role in our daily life as a large amount of cheap alcoholic beverages and low-quality counterfeits greatly damage the health of consumers.Array-based optical sensors have been developed as a fast and effective tool to discriminate multi-analytes or complex mixtures with similar structures,such as acids,esters,aldehydes and ketones.Over the past decades,optical sensor arrays have demonstrated remarkable capabilities in fast and accurate detection of diverse types,qualities,and authentic liquors.The identification strategy mainly focuses on the specific/non-specific interactions of flavor compounds in liquors with sensor elements.The cross-reactive optical signal readouts from the combination of sensor elements with liquors and multiple machine learning algorithms are essential to ensure the discriminatory capability of sensing system.In this review,we discuss the advantages and recent advances in pattern recognition of liquors in terms of the design of various types of sensing materials and the construction strategies of sensor arrays.

In-situ Health Monitoring of IGBT Modules of an On-line Medium-voltage Inverter System Using Industrial Internet of Things

Requirements of the Internet of things for the network includes the ability to monitor the equipment and devices.Nowadays,the reliability of a power electronics converter has raised concerns of both academia and industry.In particular,power semiconductor devices are continuously exposed to excessive stress while being designed with high power handling capability and are considered as the most fragile component in power converters suffering from a high failure rate.Aiming to find an effective monitoring method which is also helpful for the Internet of Things and improve the reliability of a three-level neutral-point-clamped power inverter,an in-situ health monitoring method is proposed by harnessing the inverter operational characteristics and degradation sensitive electrical parameters to address the IGBT wire bonding faults.The zero voltage state provides an inherent redundant feature that allows for a power switch to be diagnosed during its normal operation in a neutralpoint-clamped power inverter.The proposed prognostic approach obtains both the wire bonding failure features and junction temperature from the terminals of an IGBT module,which is regarded as non-invasive on-line health monitoring.The system performance can be affected by the designated testing point and testing window,which is discussed and experimentally validated.The proposed technique allows unhealthy wire bonding in IGBT modules online monitoring during the operational period of the inverter.And the proposed in-situ health monitoring of IGBT modules can be used for the industrial Internet of things.

Green revolution in electronic displays expected to ease energy and health crises

The technological revolution of long-awaited energy-saving and vision-friendly displays represented by bistable display technology is conning.Here we discuss methods,challenges,and opportunities for implementing bistable displays in terms of molecular design,device structure,further expansion,and required criteria,hopefully benefiting the light-related community.

民族、民间与现代的追求——记廖开明民艺活动与创作

鲁迅说过,自古以来一面有生产者的艺术,一面有消费者的艺术。历史上许多赫赫名迹、艺术重器莫不出于大匠之手,但漫长的历史淹没了创造者,只留下所有者的名字。研究也表明一部书画史几乎是一部文官、贵族的审美历史,普通民众的艺术创造几乎被正史遮蔽,更无从享有高雅艺术。因而中国美术打响进入现代的第一枪就要打破特权,要求美术从少数人、贵族独享的艺术中解放出来,提倡走向民间的、大众共享的艺术,使得美术民主化、大众化运动成为20世纪美术现代化运动的根本价值诉求。新兴艺术一方面与革命的社会运动结合,从左翼'普罗'文艺到延安新年画创作,一步步与民众、民间相融;一方面通过个人或有组织地努力.

Comparison of two methods for evaluating lower urinary tract symptoms in cervical cancer patients following radical hysterectomy

Objective:To compare the degree of agreement and consistency of urodynamic studies(UDS)with low urinary tract symptoms(LUTS)questionnaires for evaluating LUTS in cervical cancer patients following radical hysterectomy(RH)and pelvic lymphadenectomy.Methods:From January 2012 to March 2015,204 cervical cancer patients who underwent RH in 13 hospitals were evaluated using the Incontinence Questionnaire-Female Lower Urinary Tract Symptoms(ICIQ-FLUTS)and the Overactive Bladder Symptom Score(OABSS).Urodynamic tests were also performed on these patients during the same period.Results:Study participants’age ranged from 23 to 75 years,with a mean(standard deviation)of 48.0±9.3 years.Using questionnaires,the prevalence of patients with LUTS symptoms,including storage symptoms,voiding symptoms,stress urinary incontinence(SUI)and overactive bladder(OAB)was 86.3%,77.0%,62.7%,52.9%and 14.7%,respectively.For UDS,the corresponding prevalence was 89.7%,70.1%,66.7%,46.6%and 13.2%,respectively.The diagnostic concordance of questionnaires and UDS for storage symptoms,voiding symptoms,SUI and OAB was 79.9%,66.7%,66.7%,57.4%and 79.9%,respectively.For voiding symptoms,the correlation coefficient was 0.272,which was higher than that of storage symptoms,SUI and OAB.