FF现场总线在某引进装置中的实际使用及评述

根据基金会现场总线FF的特性,介绍并分析了其在某引进装置中的应用原则、应用状况;并阐述了现场总线在实际工程使用中所体现的优点及缺陷.     

基于PCI总线的超声多普勒血流测速系统研究

PCI总线是目前比较先进的PC机总线，已经取代了ISA总线，成为PC机总线的主流。基于PCI总线的超声多普勒血流测速系统，系统硬件为一块PCI插卡，卡上集成了获取多普勒信号的模拟电路和多普勒信号高速数据采集的数字电路，系统软件是用基于win2000的Vc＋＋6．0开发的，由于本系统采用先进的PCI技术，因此可以对数字化的超声多普勒血流信号进行实时地时频分析，在大降低信号噪声的同时，提取有用信息，有利于病变分析。     

ADμC812与MAX6955之间的I2C总线通信实现

文章概括介绍了循环式混合气辅助呼吸装置中央微处理器ADμC812与LED显示控制器件MAX6955之间I2C总线通信的硬件电路、串行接口的数据传输时序、控制串行接口的特殊功能寄存器等设计,并给出了基于汇编语言的相关软件模块.测试结果表明:系统的硬件、软件设计很好地实现了信号的可靠、稳定传输.     

Work-related Musculoskeletal Disorders in Urban Bus Drivers of Hong Kong

Introduction: Work-related musculoskeletal disorders (WMSD) affect workers in many occupations including drivers of large vehicles. Urban bus drivers have been found to have high prevalence rates of back problems in overseas studies. Hong Kong is a densely populated city and has a large number of double-deck buses that constitute a major means of public transportation. The present study aimed at investigating the prevalence and characteristics of WMSD in male and female bus drivers who operate double-deck buses in Hong Kong. Method: Altogether 481 bus drivers (404 males, 77 females) participated in the study that consisted of a questionnaire survey as well as physical assessment. The questionnaire included questions on work, musculoskeletal complaints and perceived occupational risk factors associated with each discomfort. Physical assessment consisted of measurement of lumbar spine mobility, hand grip strength, sit-and-reach test, and observation of standing and sitting postures. Results: The results showed generally the male drivers had longer years of work experience but their daily workloads were similar to the females. On the average drivers worked 9–10 h per day, with 5 days on and 1 day off. Neck, back, shoulder and knee/thigh areas had the highest 12-month prevalence rates ranging from 35% to 60%, and about 90% of the discomfort was related to bus-driving. Occupational factors of prolonged sitting and anthropometric mismatch were perceived to be most related to musculoskeletal discomfort. On physical examination, grip strength was significantly related to neck and shoulder discomfort. Conclusions: The present results showed high prevalence rates of WMSD among bus drivers in Hong Kong which warrants further investigation.     

Canadian Consensus for Biomarker Testing and Treatment of TRK Fusion Cancer in Pediatric Patients

Neurotrophic tyrosine receptor kinase gene fusions (NTRK) are oncogenic drivers present at a low frequency in most tumour types (<5%), and at a higher frequency (>80%) in a small number of rare tumours (e.g., infantile fibrosarcoma [IFS]) and considered mutually exclusive with other common oncogenic drivers. Health Canada recently approved two tyrosine receptor kinase (TRK) inhibitors, larotrectinib (for adults and children) and entrectinib (for adults), for the treatment of solid tumours harbouring NTRK gene fusions. In Phase I/II trials, these TRK inhibitors have demonstrated promising overall response rates and tolerability in patients with TRK fusion cancer who have exhausted other treatment options. In these studies, children appear to have similar responses and tolerability to adults. In this report, we provide a Canadian consensus on when and how to test for NTRK gene fusions and when to consider treatment with a TRK inhibitor for pediatric patients with solid tumours. We focus on three pediatric tumour types: non-rhabdomyosarcoma soft tissue sarcoma/unspecified spindle cell tumours including IFS, differentiated thyroid carcinoma, and glioma. We also propose a tumour-agnostic consensus based on the probability of the tumour harbouring an NTRK gene fusion. For children with locally advanced or metastatic TRK fusion cancer who have either failed upfront therapy or lack satisfactory treatment options, TRK inhibitor therapy should be considered.     

南昌市公交车司机心理健康状况及影响因素分析

目的探讨南昌市公交车司机的心理健康状况及影响因素。方法采用症状自评量表（SCL-90）对214名南昌市公交车司机的心理状况进行测评,所测数据进行统计学分析。结果公交车司机躯体化、精神病性、阳性项目数SCL-90评分均显著高于全国常模（P〈0.01,P〈0.05）,人际关系SCL-90评分显著低于全国常模（P〈0.01）;女公交车司机原始总分、阳性项目数、抑郁、恐怖SCL-90评分均显著高于男公交车司机（P〈0.01,P〈0.05）;公交车司机初中或以下、高中或中专SCL-90评分与大专或以上比较差异均无统计学意义（P均〉0.05）;已婚公交车司机原始总分、强迫、抑郁、焦虑SCL-90评分均显著高于未婚公交车司机（P〈0.01,P〈0.05）,偏执因子得分显著低于未婚公交车司机（P〈0.01）。结论南昌市公交车司机的心理健康状况低于一般人群。应关注这一特殊人群,及时对其进行心理干预。     

昆明市社区居民与出租车驾驶员COPD的患病情况

目的通过对社区居民及出租车驾驶员慢性阻塞性肺疾病(COPD)的筛查,了解其不同的患病率和可能的患病因素,并探讨有效的预防控制措施。方法 2010年6月—2011年3月分别调查了社区居民596人和出租车驾驶员507人,首先进行问卷调查,随后进行肺通气功能检查,发现COPD病例。结果总人群中社区居民平均年龄大于出租车驾驶员,COPD患病率差异无统计学意义;≥40岁人群中社区居民平均年龄大于出租车驾驶员,COPD患者平均年龄社区居民大于出租车驾驶员;社区居民COPD患病率小于出租车驾驶员;总人群中轻、重度和极重度COPD患者,社区居民患病率高于出租车驾驶员。结论出租车驾驶员COPD患病年龄小于社区居民,而COPD患病率高于社区居民,分析与出租车驾驶员主动和被动吸烟、接触汽车尾气多、工作环境空气污染重有关,需加强对出租车驾驶员防控COPD的教育。     

某公交公司驾驶员纯音听力损伤调查

目的目的调查公交车驾驶员纯音听力损伤情况,提出防治对策。方法对公交车驾驶员双耳纯音听力的测试结果进行分析。结果在633例公交车司机中,有117人听力损伤,其中双耳高频听力损伤的比例明显高于语频听力损伤比例,差异有统计学意义(P0.01);工龄在10年内听力损伤出现的比例大于其他工龄段(P0.05)。结论噪声影响公交车驾驶员的高频听力,要早期发现职业禁忌证,减少职业性噪声聋的发生。     

公交车驾驶员纯音听力损伤调查

目的调查公交车驾驶员纯音听力损伤情况,提出防治对策。方法对公交车驾驶员双耳纯音听力的测试结果进行分析。结果在633例公交车司机中,有117人听力损伤,其中双耳高频听力损伤的比例明显高于语频听力损伤比例,差异有统计学意义(P0.01);工龄在10年内听力损伤出现的比例大于其他工龄段(P0.05)。结论噪声影响公交车驾驶员的高频听力,要早期发现职业禁忌症,减少职业性噪声聋的发生。     

医院中心供氧实时监控系统的CAN总线接口设计

本文阐述了一种医院中心供氧实时监控系统中CAN总线接口的设计及验证过程。针对医院中心供氧实时监控系统数据传输和控制的要求,采用微处理器MSP430F149搭载CAN协议控制器MCP2515及收发驱动器PCA82C250实现。验证结果表明,该CAN总线接口通过其SPI接口实现了微处理器MSP430F149的CAN接口扩展,可以满足中心供氧实时监控系统数据传输和控制的需求。