一种基于PLC控制的茶叶理条机

长久以来,我国一直是茶叶消费大国,我国茶叶品种多、分布广。但是作为茶叶的生产,特别是茶叶采摘之后的理调,至今还是以手工为主。通过设计一种由PLC模块控制的全自动茶叶理条机,可以预设茶叶质量,完成自动理条分配。

Application study of digital PID controller in cockpit temperature auto-regulating system

Aiming at the inherent blemish existi ng currently in airplane cockpit temperature regulating system,a digital temperatu re auto-regulating design scheme of the system is put forward,namely,a digita l proportional-integral-derivative(PID) controller used for temperature contr ol is designed.And then it is applied in airpl ane cockpit temperature regulating system by adopting the way of cascade control.Experiment results indicate that the design scheme is reasonable and practical.

Achieving Self-Imitation for English Intonation Learning:The Role of Corrective Feedback

Corrective feedback is crucial for pronunciation teaching.However,in current pronunciation teaching practice,the corrective feedback provided usually fails to locate pronunciation problems and inform learners of the differences between their mispronunciations and the correct form.Based on the motor theory,this study attempted to explore a new way of corrective feedback for pronunciation teaching.Specifically,the learners’ speech output was modified and then was played back to them as an input model for learning.In this way,the learners can imitate the pronunciation model of their own voices,achieving self-imitation.This study included two experiments.The first explored the viability of obtaining one’s self-perceived voice through delayed feedback paradigm.The second experiment examined the effectiveness of self-imitation for English intonation learning.Results showed that imitating the pronunciation model of one’s own voice can reduce the learners’ phonological memory load,assist critical listening and facilitate accurate phonetic realizations of the target intonation.

UV Wavelength Tunable Output System Controlled by Microprocessor

UV wavelength auto-tuned tuned output system is realized by the difference method. Controlled by the microprocessor, output wavelength auto- tracking is achieved.Besides, equipment self-checking auto-positioning and temperature correct are realized,The wavelength tuned output efficiency in the experiment is better than 97 %.

Moving the Goalpost： ＂Come-We-Stay＂ Practice in Menchum Division （MD）, Cameroon

This paper seeks to understand people＇s perception of ＂come-we-stay＂ （CWS） cohabitation in Menchum Division （MD）, Cameroon. As in most of Africa, marriage is a valued institution that ensures the continuation of the family tree. The emergence of CWS is gathering momentum fast in many communities in the country much to the dislike,of the church and custodians of tradition who perceive CWS to be a cheap union form that breaches marriage norms. This paper seeks to address whether the emergence of CWS has affected marriage perceptions in MD. Initially, quantitative data were collected via online survey disseminated via Facebook. The time-efficiency, economic viability, convenience and anonymity of this method made it a viable method for this study. Later, however, due to a low response to the Facebook link, the online survey was constructed into a questionnaire and administered to the same target population. Questionnaires were relevant to this study because they could be self-administered. However, the questionnaires were limited as they did not allow for attention to details. The data were analysed using content analysis.

Animal Behavior in a Fully Automatically Controlled Dairy Farm

As there are increasing numbers of small farms in Germany, it is necessary for them, to keep the workload as small as possible by enhancing the use of automatism. Important as those energetic-technical capabilities and features in a modem dairy farm are, the final decision when using automatic machinery depends on the animal itself and its behavior. As a result, all animal-physiological criteria, animal protection and animal welfare have to be taken into consideration. Therefore tests have been done to investigate dairy cattle behavior on suddenly occurring energy failures, fluctuations or postponements due to a load management. The experiments have been taken in four different stables. In each stable, 12 ＂focus cows＂ have been selected. Their daily stress response was measured by a heart rate monitor and faecal cortisol metabolites. Video observation showed modifications in behavior, escape or avoidance reactions; pedometers recorded the movement activity. These scientific experiments will demonstrate cattle behavior in situations driven by a power load management, but no statistically significant effects on the usual daily routine are being expected.

AN ALTERNATIVE APPROACH TO GLOBAL ROBUST OUTPUT REGULATION OF OUTPUT FEEDBACK SYSTEMS

The global robust output regulation problem of the output feedback systems has been extensively studied under various assumptions of the complexity and uncertainty. All these approaches boil down to a stabilization problem of a so-called augmented extended system. This paper will describe an alternative approach which converts the original problem into a stabilization problem of a so-called extended augmented system. As the extended augmented system is somewhat simpler than the augmented extended system, this alternative approach is also simpler than the first approach.