工程机械轮胎成型机的发展

缓慢,因为人们关注的主要是生产大宗轮胎的机器。因此,新一代工程机械轮胎成型机的出现具有特殊的意义,特别是因为这种轮胎的市场条件正在迅速变化。目前,大部分工程机械轮胎成型机都相当陈旧,对它们往往是进行修理和改造,而不是更新。工程机械轮胎成型的理念和技术相当长时间以来未发生变化,这意味着大胎生产往往需要大量手工劳动。近年来唯一真正的改进是采用轮胎胎面胶条自动缠绕工艺。不愿更新工程机械轮胎成型机的一个历史原因可能是投资比较大,它与这一市场用量较低相矛盾。但是目前工程机械轮胎的发展(供选择轮胎越来越多,批量越来越…     

Intracavity laser absorption measurements at ultrahigh spectral resolution

Intracavity laser absorption spectroscopy with ultrahigh sensitivity and enhanced spectral resolution is demonstrated. It entails use of an intracavity étalon that selects equally spaced modes of the cavity. These modes are reduced in intensity when they occur at spectral locations where absorption that is due to intracavity species also occurs. We obtained absorption spectra by tuning the étalon in small steps across its free spectral range, recording intracavity spectra at each step, and summing the result. The maximum resolution is determined by the width of the étalon peaks, which was ~0.01 cm(-1). When the finesse of the étalon is increased, the resolution equal to the width of a single laser mode can be achieved. With this technique, spectra at Doppler-free resolution such as that required for studies of high vibrational-overtone transitions of molecules in supersonic jets are possible.     

Agent-Based Approach to Mass-Oriented Production Planning: Case Study

This paper discusses the potential of multiagent planning techniques in the production-planning domain, with special focus on mass-oriented production. The research presented in the paper has been centered around ExPlanTech-a specific implementation of a production-planning multiagent system. Suitability of ExPlanTech for mass-oriented and project-driven manufacturing is also discussed in the paper. Applicability of multiagent concepts is demonstrated on a multiagent planning architecture and production-planning case study at a Skoda Auto Engine Plant     

A Low-Power High-Sensitivity X-Band Rail SAR Imaging System [Measurement's Corner]

Wideband radar imaging with range gating and high sensitivity can be achieved with the use of low-cost commercially available narrowband IF filters. Such filters reduce the effective receiver noise bandwidth of the radar system. This allows for high sensitivity, comparable to that of single-sideband radio receivers, while at the same time acquiring de-chirped wide-band received waveforms. A carefully developed radar architecture, based on the use of these IF filters, is shown in this paper. This radar architecture is then implemented in an X-band linear rail synthetic-aperture-radar (SAR) imaging system. The X- band rail SAR is a linear FM-chirped radar, which chirps from approximately 7.5 GHz to 12.5 GHz. The radar front end is mounted onto an eight-foot-long linear rail. The transmitted power is adjustable to 10dBm or less. It will be shown that objects as small as groups of pushpins in free space can be imaged using transmitted power as low as 10 nW. These results are compared to previous direct-conversion X-band FMCW rail SAR work. A high-sensitivity X-band rail SAR such as this could be useful for measuring low-radar-cross-section (RCS) targets. This radar could be used in high clutter environments that require a range gate. This low-power X-band rail SAR could be useful for operation in restricted transmission areas, where maximum radiated power is severely limited. Other applications include any that require low transmitter power, such as automotive radar.     

Mobility management for D2D communication combining radio frequency and visible light communications bands

Wireless Networks - Combination of radio frequency (RF) and visible light communication (VLC) bands for device-to-device (D2D) communication is seen as a promising way to both increase the system...     

Point of entry and functional impairment as predictors of treatment amount and cost for patients with mental illness and substance abuse disorders in Santa Barbara County Mental Health Services.

This study examines point of entry, functional impairment, comorbid diagnosis, and demographic variables as predictors of treatment amount and cost for patients with mental illness and substance abuse disorders in Santa Barbara County Mental Health Services. Overall, significant results were found for point of entry, with higher costs associated with mental health than chemical abuse point of entry. Furthermore, amount, modality, and cost of service varied widely across such variables as functional impairment with those rated as least impaired receiving the greatest amount of services at the greatest cost. Additional significant findings in treatment amount and cost are reported for variables such as homelessness, ethnicity, and age. (PsycINFO Database Record (c) 2010 APA, all rights reserved)