金川铜镍硫化物中铂族及微量元素地球化学特征

微量元素相关性和配分特征反映矿浆的不同源区和演化过程。本文从PGE,Zn,Sb,As,Mn,V,Ba,Sr,REE的相关系数和配分特征来判断不同期次和不同类型岩矿石的成岩成矿母质的原始特征和演化过程。利用各种参数比值和图解佐证了金川矿体的成矿母质属于高镁拉斑玄武岩。     

固定床中木块和木屑的热解特性

在固定床反应器中,分别对比研究木块和木屑的堆积特性,并对比研究在28 8kW条件下的传热和热解特性.实验结果说明,木屑和木块具有不同堆积特性和热解特性.反应结束时的特征温度分别为844℃和866℃;热解时间分别为75min和62min;焦油产量最大,分别为51 4%和48 8%,木炭产量最少,质量分数分别为21 0%和25 4%;累积产气量分别为277L和253L,最大瞬时产气速率分别为27L/min和10L/min.     

新形势下工会政工工作中人文关怀和心理疏导

社会在持续发展和不断进步,员工将面对更多的压力和挑战,在新形势下,政工工作中做好人文关怀和心理疏导显得尤为重要,为此,工会可通过定期心理健康调研、建立专业咨询渠道、开展心理健康培训、关注特殊群体、制定应急心理援助计划和营造关爱文化等措施,提供全面的心理健康支持,帮助员工更好地应对压力和焦虑,提高员工的幸福感和工作效率。未来,充分利用数字化心理健康支持、人工智能辅助、灵活服务模式和国际经验借鉴等,持续优化工作,提升员工满意度,提高员工的生活品质,为可持续发展创造良好环境。     

美卓HP800圆锥破碎机常见故障及处理方法

针对美卓HP800圆锥破碎机常见故障进行了全面、深入的研究,包括机械、液压和电控系统的故障类型,并依据多学科理论如轴承学、流体力学和电子工程,结合实际操作经验,提出了一系列具有针对性和高实用性的解决方案。这些措施有效减少了设备的停机时间,显著提高了整体系统的可靠性和效率,为设备生产的稳定性提供了科学依据,有助于推动相关企业和技术人员在设备管理和维护方面达到更高的工作水平,对矿山设备管理和维护实践具有重要参考价值。     

健康社区及其测量指标体系的概念框架

健康社区建设运动和研究在西方社会开展已有数年,但在中国却没有引起足够重视.在文献整合分析的基础上,文章通过对健康社区建设运动、弹性和可持续性等理论的分析和研究,探讨了健康社区的基本概念和建设健康社区的基本原则,分析了健康社区与弹性、可持续发展的相互关系,最后构建了健康社区测量的基本流程和其指标体系概念框架,并讨论了健康社区指标和测量的评估问题.     

家校携手为多动症孩子散播心灵阳光

如若星星知道自己背负着愿望,它一定会努力地闪烁.多动症孩子如能受到家长和老师的持久关爱和理解,也一定会绽放自己的金色童年.重要的是,学校和家庭都要采取科学的教育方法,老师和家长要加强沟通和配合,拿出足够的耐心和宽容,要走出传统思维误区,正确看待、引导和帮助多动症孩子,让阳光和爱心用科学合理的方法播撒给孩子,让他们摆脱困扰,重新找回自信和快乐,收获成长和喜悦.     

企业计算机备件管理系统的开发与应用

本文介绍新开发的备件管理信息系统的基本情况,该系统在中州铝厂备件管理制度及多年管理经验的基础上,运用计算机网络技术和目前最先进的软件平台和开发工具,实现了备件计算机辅助管理,在备件计划、合同、验收和库存管理方面提高了准确性和科学性,取得了明显的经济效益和社会效益。     

全球化视阙下中国政治体制改革的发展趋势浅析

经济全球化不仅对我国的经济发展产生了巨大的影响,而且还通过市场经济机制、政府管制机制和文化渗透机制,直接、全面、深刻和持久地影响着我国社会生活的稳定发展.我们必须根据经济全球化的客观要求和我国社会的实际情况,通过观念更新、政策调整和制度创新,建立和完善新型的社会主义体制和民主法治国家,保持我国社会政治稳定,推动社会主义现代化建设的不断发展.     

高炉智能化生产管理系统的开发与应用

高炉炼铁在当前钢铁生产流程中占据着主导地位,利用计算机系统和自动化技术来对高炉日常生产进行有效判断和管理,一直是高炉炼铁领域的追求目标和发展方向。文章针对高炉日常生产的管理智能化进行研究,系统介绍了高炉智能化生产管理系统的研发特点和应用情况。研究和应用的结果表明,高炉智能化生产管理系统能够对高炉的日常操作和管理提供实时建议和有效的管理指导,为高炉操作和管理人员提供科学的决策依据。     

钢渣处理与余热回收技术的分析

对国外和中国钢渣处理的余热回收技术和余热回收装置应用案例进行了大量列举、系统比较和分析。通过比较和分析表明：熔融钢渣中的余热可以通过各种不同的钢渣处理工艺,结合科学、经济、合理的热能回收技术将余热加以回收和利用,成果十分显著。同时,指出了由于受钢渣固有特性和物化条件的制约,目前钢渣余热资源的回收存在着许多问题,有待于钢铁行业和热能开发领域的研究者继续探讨和解决。最后,对钢渣余热回收的前景进行了展望,建议政府和相关领域予以足够的重视和支持。     

铁路信号区间微机自控及光纤信息传输系统

铁路信号区间微机自控系统,过去一直采用继电式闭塞机,技术落后,稳定可靠性能差。研制采用铁路信号区间微机自控及光纤远程传输系统,提高了铁路区间自控系统设备的运行可靠性,保证铁路运输安全。     

堆取料机连锁信号和语音信号无线传输技术研究

针对堆取料机群与控制室构成的系统,研究了连锁信号和语音信号的无线通讯技术,设计了基于802.11b的一点对多点模式的连锁信号、语音信号无线传输系统。该技术已成功应用于莱钢9台堆取料机群的信号通讯,成功实现了连锁和语音信号的无线传输。     

粗轧机组扭矩远程在线监测系统研究

针对武钢热轧总厂第三分厂1580生产线粗轧机组R1、R2传动轴扭矩,建立了远程在线扭矩监测系统,采用扭矩遥测设备实现了传感器电源及输出信号在旋转部件与外部静止部位之间的传递,扭矩传感器输出信号转换为数字信号后进行无线传输,有效起到抗干扰和抑制噪声作用,远距离信号传输采用了电流信号同样起到抗干扰作用,并编制了扭矩、轧制力等工艺参数监测的软件。经过近一年时间的使用,本系统能准确有效完成扭矩、轧制力等工艺参数的监测。     

铁路道口信号自动防护系统研究与应用

铁路道口是铁路路外事故多发地段,国家铁路和地方铁路目前采用的防护系统尚存在一些问题。经多方调查研究,结合现行可靠设备和开滦煤矿实际,综合利用研究开发一套可以满足需要的铁路道口信号自动防护系统。     

Improvements to the in vivo measurement of cadmium in the kidney by neutron activation analysis

The McMaster University in vivo cadmium measurement system has been upgraded. Two large surface area hyperpure germanium planar detectors (51 mm diameter x 21 mm depth) are now employed for the detection of the 559 keV gamma-ray signal from cadmium. Phantom studies indicate that the new detectors have significantly improved the system. The detection limit in kidney phantoms has been reduced from 8.9 to 3.8 mg for the same dose and measurement time.     

铁路信号微机自控系统防雷

简要介绍铁路信号微机自控系统的作用、原理。以武钢配料站微机自控系统为例，提出自控系统防止直接雷击和感应雷的设计方案，并对有信号微机自控系统的工矿企业提几点建议。     

热轧机械振动在线监测和故障诊断系统

介绍了武钢第二热轧厂轧机机械设备振动在线监测和故障诊断系统的基本构成、软硬件配置以及状态监测、信号分析和故障诊断等主要功能。实践证明,该系统的设计体现了轧钢机械振动监测的要求,具有较高的可靠性和实用性,为轧钢机械故障诊断提供了一条新途径。     

Region-specific expression of chicken Sox2 in the developing gut and lung epithelium: regulation by epithelial-mesenchymal interactions

A quality control system especially designed for dosimetry in scanning proton beams has been designed and tested. The system consists of a scintillating screen (Gd2O2S:Tb), mounted at the beam-exit side of a phantom, and observed by a low noise CCD camera with a long integration time. The purpose of the instrument is to make a fast and accurate two-dimensional image of the dose distribution at the screen position in the phantom. The linearity of the signal with the dose, the noise in the signal, the influence of the ionization density on the signal, and the influence of the field size on the signal have been investigated. The spatial resolution is 1.3 mm (1 s.d.), which is sufficiently smaller than typical penumbras in dose distributions. The measured yield depends linearly on the dose and agrees within 5% with the calculations. In the images a signal to noise ration (signal/1 s.d.) of 10(2) has been found, which is in the same order of magnitude as expected from the calculations. At locations in the dose distribution possessing a strong contribution of high ionization densities (i.e., in the Bragg peak), we found some quenching of the light output, which can be described well by existing models if the beam characteristics are known. For clinically used beam characteristics such as a Spread Out Bragg peak, there is at most 8% deviation from the NACP ionization chamber measurements. The conclusion is that this instrument is a useful tool for quick and reliable quality control of proton beams. The long integration-time capabilities of the system make it worthwhile to investigate its applicability in scanning proton beams and other dynamic treatment modalities.     

Proposed new bladder volume monitoring device based on impedance measurement

A new implantable bladder volume-monitoring device based on the impedance measurement of the detrusor muscle is described. The system is completely autonomous and forms a mixed-signal (analogue/digital) feedback loop with a neuro-stimulator to rectify bladder dysfunctions (incontinence and retention) through neuromuscular stimulation techniques. A programmable instrumentation amplifier and a signal processing block, to eliminate the artefacts caused by the patient's movements, have been designed and tested. The layout for the signal processing block has been realised in 0.8 micron BiCMOS technology.     

Valve Design for Extracting Response Functions from Hydraulic Systems Using Pseudorandom Binary Signals

The analysis of the dynamic response of a pressurized water pipeline system is important for the design and also the integrity monitoring of these systems. An efficient method for summarizing the behavior of a pipeline system is through the determination of their system response functions. These functions can be extracted by injecting a pressure signal with a wide bandwidth that persists over the length of a pipeline system. Unlike electrical and mechanical systems, generating such signals in pressurized water systems is difficult. Valves capable of generating a signal against the system back-pressure often lack the necessary maneuverability to ensure the signal is sharp (and hence with high-frequency content) and the generated transient is often large in amplitude, risking damage to the system. A method for generating a small amplitude transient signal with a wide band of frequencies is desirable. This paper presents the design for a side discharge valve for generating a pseudorandom binary sequence of pressure changes that are of a small magnitude in relation to the steady state head of the pipeline. The pseudorandom pressure sequence is used to provide an estimate of the system response function. The continuous form of the signal allows the amplitude of each individual pulse within the signal to be small while maintaining the same signal bandwidth. The valve has been tested experimentally and was found to provide a good match with the theoretical response of the pipeline. The method provides a practical alternative to frequency sweeping using sinusoidal signals or sharp valve closures for the extraction of the response functions. Once determined, the system response function can be utilized to detect system faults such as leaks and blockages.