Control System of Auto Assembly for Minute Hand and Gear Wheel Based on PLC

设计了一种基于PLC的分轮自动装配机控制系统,阐述了该系统的构成和控制原理以及系统的软硬件。将该系统应用到分轮自动装配机的装配中取得了良好的效果,大大提高了分轮自动装配机的生产效率和产品品质,节约了大量的人工成本。In this article a control system for auto assembly of minute hand and gear wheel based on PLC is designed and the principle of this control system,consisting of the hardware and software is introduced.This system runs well in the production improves efficiency and quality of product in the application of this system and reduces the cost of manpower

Design and Realization of Automatic Assemble Machine of Minute Pinion and Axle

设计了一台全自动的钟表分轮装配机,阐述了该机的构成和控制原理,很好地实现了分轮和分轮轴的快速高效装配,极大提高了分轮和分轮轴装配车间的生产效率和产品品质,节约了大量的人力成本。该机所设计的装配件采用整体预定位的方法,缩短了定位时间,提高了装配精度,适用于其它类似精密器件的自动装配上。A new kind of full automatic assemble machine of minute pinion and axle is designed and the component and the principle of the machine are studied in this paper.The machine has its perfect function,so that it not only greatly improves the efficiency and quality of the production in the assemble workshop,but also saves the cost of manpower.It can shorten the time of orientation,improve the assemble accuracy to adopt the method of whole preset orientation,and it also can be used in the automatic assembles of other similar precise machines

Design and Application of Pneumatic-feeding Control System Based on PLC

设计了基于PlC的气动送料控制系统,阐述了该系统的构成和控制原理,给出了硬件选型和软件设计流程图。该控制系统的应用效果好,成本低廉,生产效率提高。A control system of pneumatic feeding mechanism based on PLC is designed in this paper.The principle and structure of the control system are analyzed in detail and hardware selection and software design scheme are given.The control system has the advange of good effects,low cost,saving manpower cost and improving the production efficiency

Design and Realization of Pneumatic Automatic

设计一种气动自动送料系统,介绍了该系统的构成和工作原理,阐述了气动回路和电气回路的设计。该系统采用PlC-人机界面的控制方式,实现了送料的自动化,节约了大量人工成本,可应用于相关加工机床。A pneumatic automatic feeding system has been designed in this paper.The principle and consisting of system are analyzed,and the designs of pneumatic circuit and electrical circuit are described.The control method of PLC and human-machine interface is used.It realizes automatic feeding and saves a lot of labor costs,can be applied to the relevant processing machines

三峡库区二元经济结构特征及其消除途径

以重庆库区为例 ,首先从静态和动态两个方面分析了三峡库区经济的二元化特征。静态特征表现在城乡之间资本存量、生产率和收入水平三个方面的差异。动态特征主要表现为投资结构变化中工业投资比重远远高于农业 ;比较劳动生产率演变中工业部门的比较劳动生产率远远高于农业部门 ;城乡收入水平和消费水平变动中非农业生产者的收入和消费水平远远高于农业生产者的收入和消费水平 ;产业演进过程中 ,产业内部的产业分工和技术等级上的二元性。其次 ,探讨形成三峡库区二元经济结构的成因。最后 ,提出改变库区二元经济结构的具体途径是加强库区中心城市与周围地区的经济联系 ,发挥中心城市对库区的带动作用 ,实现城市工业与乡村工业互动和工业化与城市化互动

基于杂质带的光子晶体矩形波形滤波器的实现

利用转移矩阵方法对基于杂质带的光子晶体矩形波形滤波器的实现进行了研究.除了可选择不同折射率的材料外,该滤波器还可通过调整光子晶体本身的结构参量来实现.对较平杂质带的形成机制做了具体的理论分析和解释,通过数值计算光子晶体原子耦合成光子晶体分子的过程,发现光子晶体原子的线宽与光子晶体分子线宽之间的相对大小是决定能否形成较平杂质带的重要参量

一种实现光子晶体波导定向耦合型多路光均分的新方法

将多光子晶体单模波导平行、邻近放置构成定向耦合器. 依据自映像原理,数值分析了输入光场对称入射时,该系统中光的传播行为. 基于此结构,以三、四通道为例,设计了超微多路光分束器,并仅通过对称地改变耦合区中两个介质柱的有效折射率,使光场在横向发生重新分布,实现了输出能量的均分或自由分配. 和已报道结果相比,此调制方法更为简单易行而且效率更高,并可以推广到具有更多输出通道的光分束器中,在未来的集成光回路中具有广泛的应用价值

新疆气候变化及短期气候预测综合系统研究

该项目提出了现代气候观新概念，并深刻地阐述了其科学内涵，并研究指出现代气候观是一个相互联系和作用的观念系统包括气候系统观、气候资源观、气候环境观、气候变化观、气候层次观。项目还揭示出新疆气候变化和三大气候灾害——新疆春季水旱、夏季洪涝和夏秋季低温冷害的若干新现象、新事实，并对其形成原因、物理机制和预测应用进行了新的探索，同时研制成了2000新一代《短期气候预测综合业务系统》。该项目研究与世界气象组织提出的全球气候变化研究规划在时间上恰好是一致的，并始终紧贴自治区以一白(棉花)一黑(石油)为重点的优势资源转换发展战略和以生态环境保护和建设为根本和切入点的西部大开发战略，坚持边研究、边行动、边应用的原则，在“用”上下功夫，取得了显著的社会、经济、环境和气象业务效益

Aripiprazole versus other atypical antipsychotics for schizophrenia

BACKGROUND: In most western industrialised countries, second generation (atypical) antipsychotics are recommended as first line drug treatments for people with schizophrenia. In this review we specifically examine how the efficacy and tolerability of one such agent - aripiprazole - differs from that of other comparable second generation antipsychotics. OBJECTIVES: To evaluate the effects of aripiprazole compared with other atypical antipsychotics for people with schizophrenia and schizophrenia-like psychoses. SEARCH METHODS: We searched the Cochrane Schizophrenia Group Trials Register (November 2011), inspected references of all identified studies for further trials, and contacted relevant pharmaceutical companies, drug approval agencies and authors of trials for additional information. SELECTION CRITERIA: We included all randomised clinical trials (RCTs) comparing aripiprazole (oral) with oral and parenteral forms of amisulpride, clozapine, olanzapine, quetiapine, risperidone, sertindole, ziprasidone or zotepine for people with schizophrenia or schizophrenia-like psychoses. DATA COLLECTION AND ANALYSIS: We extracted data independently. For dichotomous data we calculated risk ratios (RR) and their 95% confidence intervals (CI) on an intention-to-treat basis based on a random-effects model. Where possible, we calculated illustrative comparative risks for primary outcomes. For continuous data, we calculated mean differences (MD), again based on a random-effects model. We assessed risk of bias for each included study. MAIN RESULTS: We included 12 trials involving 6389 patients. Aripiprazole was compared to olanzapine, risperidone and ziprasidone. All trials were sponsored by an interested drug manufacturer. The overall number of participants leaving studies early was 30% to 40%, limiting validity (no differences between groups).When compared with olanzapine no differences were apparent for global state (no clinically important change: n = 703, 1 RCT, RR short-term 1.00 95% CI 0.81 to 1.22; n = 317, 1 RCT, RR medium-term 1.08 95% CI 0.95 to 1.22) but mental state tended to favour olanzapine (n = 1360, 3 RCTs, MD total Positive and Negative Syndrome Scale (PANSS) 4.68 95% CI 2.21 to 7.16). There was no significant difference in extrapyramidal symptoms (n = 529, 2 RCTs, RR 0.99 95% CI 0.62 to 1.59) but fewer in the aripiprazole group had increased cholesterol levels (n = 223, 1 RCT, RR 0.32 95% CI 0.19 to 0.54) or weight gain of 7% or more of total body weight (n = 1095, 3 RCTs, RR 0.39 95% CI 0.28 to 0.54).When compared with risperidone, aripiprazole showed no advantage in terms of global state (n = 384, 2 RCTs, RR no important improvement 1.14 95% CI 0.81 to 1.60) or mental state (n = 372, 2 RCTs, MD total PANSS 1.50 95% CI -2.96 to 5.96).One study compared aripiprazole with ziprasidone (n = 247) and both the groups reported similar change in the global state (n = 247, 1 RCT, MD average change in Clinical Global Impression-Severity (CGI-S) score -0.03 95% CI -0.28 to 0.22) and mental state (n = 247, 1 RCT, MD change PANSS -3.00 95% CI -7.29 to 1.29).When compared with any one of several new generation antipsychotic drugs the aripiprazole group showed improvement in global state in energy (n = 523, 1 RCT, RR 0.69 95% CI 0.56 to 0.84), mood (n = 523, 1 RCT, RR 0.77 95% CI 0.65 to 0.92), negative symptoms (n = 523, 1 RCT, RR 0.82 95% CI 0.68 to 0.99), somnolence (n = 523, 1 RCT, RR 0.80 95% CI 0.69 to 0.93) and weight gain (n = 523, 1 RCT, RR 0.84 95% CI 0.76 to 0.94). Significantly more people given aripiprazole reported symptoms of nausea (n = 2881, 3 RCTs, RR 3.13 95% CI 2.12 to 4.61) but weight gain (7% or more of total body weight) was less common in people allocated aripiprazole (n = 330, 1 RCT, RR 0.35 95% CI 0.19 to 0.64). Aripiprazole may have value in aggression but data are limited. This will be the focus of another review. AUTHORS' CONCLUSIONS: Information on all comparisons are of limited quality, are incomplete and problematic to apply clinically. Aripiprazole is an antipsychotic drug with a variant but not absent adverse effect profile. Long-term data are sparse and there is considerable scope for another update of this review as new data emerges from the many Chinese studies as well as from ongoing larger, independent pragmatic trials