狂PK的狂想曲

时隔前一次写“稀饭第九页”已经半年多了,我搬到了离单位较近的地方,已经不用像上次写的那样将刷牙和早饭这两项工作同时进行了,上班只要步行10分钟(假想图:需要坐3小时公车才能到单位的柳絮飞作崇拜状)。时间充裕了许多后,让我能有时间考虑许多问题,比如理想。以前我曾有很多     

活塞裙部润滑分析(上)

<正> 1 前言长期以来,活塞组件一直被认为是发动机机械摩擦损失的主要来源,而且又是表示其可靠性和耐久性的要害润滑界面。目前,已有几种试验方法,用于研究实际工作中的发动机活塞组件的摩擦情况。但是,目前还不可能在这些试验中分离出裙部的摩擦情     

Training for an agricultural discrimination task

Skeleton weed, centaurea juncea, is a declared weed in Western Australia because it competes with grain crops for nutrients and moisture. When it is found during harvesting, mechanised teams search and eradicate it. In an earlier report of field trials (Hartley et al, 1989) it was reported that search teams' detection rate was poor and since search teams had usually never seen skeleton weeds, visual discrimination learning was to be expected and observed during searches. The present study investigated the nature of this discrimination learning in a laboratory by developing a training programme of colour photographic slides of weeds in stubble. Subjects receiving specific training with feedback on their performance compared with those receiving pseudo-training showed a significant improvement in detections. Subsequently the benefit of the programme was validated in a field trial.     

Ergonomics in sickle operation

Sickle operation in harvesting has been analysed with reference to design features of nine different types of sickles, and field and laboratory based investigations on biomechanical stresses and physiological valuation on six farmers. It has been indicated that the blade geometry contributes significantly to human performance and there is ample scope for further design optimisation. The suggested modifications are: (i) sickle weight - 200 g; (ii) total length of sickle - 33 cm; (iii) handle length - 11 cm; (iv) handle diameter - 3 c cm; (v) radius of blade curvature - 15 cm; (vi) blade concavity - 5 cm; (vii) serrated sickle: tooth pitch - 0.20 cm and tooth angle - 60 degrees; (viii) ratio of the length of cutting surface to chord length - 1.20.     

UASB-SBR工艺处理啤酒废水

阐述了UASB-SBR组合工艺处理啤酒废水的工艺流程,实践表明,UASB-SBR系统具有运行稳定、费用低、抗冲击负荷强等优点。     

UASB-SBR工艺处理啤酒废水

阐述了UASB—SBR组合工艺处理啤酒废水的工艺流程，经实践表明，UASB—SBR系统具有运行稳定、费用低、抗冲击负荷强等优点。     

活性炭对Cr（Ⅳ）吸附机理的探讨

根据焦作电厂粉煤灰堆放场引起地下水中Cr(Ⅳ)污染的实际情况，在实验室里模拟配制水样，使其接近当地地下水中Cr(Ⅳ)浓度。进行活性炭对Cr(Ⅳ)的吸附试验。对所得的试验数据进行分析，探讨活性炭的吸附机理。这些工作为处理和修复被污染的地下水提供理论依据，此外，还对去除地下水中Cr(Ⅳ)提出合理建议。     

A scalable, self-analyzing digital locking system for use on quantum optics experiments

Digital control of optics experiments has many advantages over analog control systems, specifically in terms of the scalability, cost, flexibility, and the integration of system information into one location. We present a digital control system, freely available for download online, specifically designed for quantum optics experiments that allows for automatic and sequential re-locking of optical components. We show how the inbuilt locking analysis tools, including a white-noise network analyzer, can be used to help optimize individual locks, and verify the long term stability of the digital system. Finally, we present an example of the benefits of digital locking for quantum optics by applying the code to a specific experiment used to characterize optical Schr?dinger cat states.     

Effect of molecular anisotropy on backscattered ultraviolet radiance

The effect of molecular anisotropy on backscattered UV (BUV) radiances is computed by accounting for it in both Rayleigh optical thickness and the scattering-phase matrix. If the effect of molecular anisotropy is included only in the optical thickness and not in the phase matrix, then for high sun (θ(0) ～ 0°), the nadir radiance (I(0)) leaving the top of the atmosphere is approximately 1.8% higher than the radiance (I(op)) computed with the effect included in the phase matrix. For very low sun (θ(0) > 80°), I(0) is approximately 2.3% lower than I(op). For off-nadir radiances the relative increase (decrease) depends on both the local zenith angle as well as the azimuth angle. Also, an increase in the surface reflectivity decreases the effect of molecular anisotropy on the upwelling radiances. Exclusion of the anisotropy factor in the Rayleigh-phase matrix has very little effect (<1%) on ozone retrieval from the BUV-type instruments. This is because of the ratio technique used in the retrieval algorithm, which practically cancels out the anisotropy effect.