单、双秤架电子皮带秤的选用

皮带秤是自动连接计量皮带运输机所运输物料的计量设计,只有保证其称量准确性,可靠性和稳定性,才能为用户提供可靠的称量依据,起到计量的作用,经过对单,双秤架电子皮带秤的应用,发展双秤架电子皮带秤有单秤架电子皮带秤的许多无法比拟的优点,现把双秤架电子皮带秤重点介绍一下,望工程技术人员在皮带秤的选型方面有所借鉴。     

四配料秤自动配煤系统的应用分析

1 前言 皮带配料秤由配料秤秤架、配料控制器、调速执行设备（变频器等）组成。秤架为调速秤秤架，适用于从供料仓下直接取料。其特点是结构比较紧凑，在出料口截面积相对固定的情况下，改变配料秤秤架皮带的速度即可改变出料量的大小。另外，结合生产工艺和生产实际情况，自行设计要求增加振动器（便于及时处理下料不畅和悬料）和电液闸板阀（检修和校秤时不需放空煤仓）。皮带配料秤的工作原理为配料控制器不断检测秤架上物料的流量，并与仪表内的设定值相比较，     

电子皮带秤的选型安装及维护

根据电子皮带秤在我厂的使用情况简述了电子秤秤架的选型上的一些技术要求，对目前国内使用的秤架状况进行了分析对电子秤的使用精度概念作了较详细的说明，在电子秤的安装方面应遵守的准则，在维护方面应做的调整和检查工作。     

滚动轴承在向机皮带秤秤架各铰接处的应用

叙述微机皮带秤各铰链连接处应用密封的滚动轴承来代替滑动连接，进一步提高了秤架的精确度、灵敏度和稳定性。     

滚动轴承在微机皮带秤秤架各铰接处的应用

叙述微机皮带秤各铰链连接处应用密封的滚动轴承来代替滑动连接 ,进一步提高了秤架的精确度、灵敏度和稳定性。     

皮带秤秤架的准直性校准

皮带秤秤架的准直性校准是电子皮带秤投运前非常重要的一项工作,介绍了几家公司的准直性校准的技术要求和方法,在此基础上提出了推荐的准直性校准要求和方法。     

板坯自动称量技术及其应用

介绍一种用于板坯称量的１６ｔ级板坯秤及其自动称量技术。该秤具有独特的机械构造，由ＰＬＣ控制液压驱动系统完成秤架的升降，实现对板坯的自动称量。     

广东连南秤架麦凹铜锌矿矿床地质特征及成因探讨

广东连南秤架麦凹铜锌矿是接触交代矽卡岩型矿床,矿床地质特征是矿体规模小、似层状,铜锌硫化物矿石,围岩蚀变主要为矽卡岩化、大理岩化。通过对矿床的成因进行探讨,为寻找同类型矿床提供找矿思路。     

承德市开发区盛方电子有限公司

承德市开发区盛方电子有限公司，是专门从事工业电子衡器制造的公司。公司集开发、制造、服务于一体。主要产品有：抓斗秤、吊车秤、定量给料机、皮带秤、钢水秤、平台秤、钢材秤、配料秤等。2004年通过IS09001质量体系认证。[第一段]     

30吨机械秤实行电气化改造

1.关于30吨机械秤实行自动显示及打印技术的立题说明我厂30吨机械秤于1981年安装投产,是一老式机械秤,长期以来靠人工计量和人工记录,时有差错出现或短斤少两或外发超重。根据该秤这几年的应用及所暴露的不足,并经公司同意于1988年立项改造。 2.初步设计将原机械秤的分平重点联结环去掉,增加二个联接吊钩,中间加一个电阻应变式拉力传感器(见图1)。     

DHR3, an ecdysone-inducible early-late gene encoding a Drosophila nuclear receptor, is required for embryogenesis

Response to the steroid hormone ecdysone in Drosophila is controlled by genetic regulatory hierarchies that include eight members of the nuclear receptor protein family. The DHR3 gene, located within the 46F early-late ecdysone-inducible chromosome puff, encodes an orphan nuclear receptor that recently has been shown to exert both positive and negative regulatory effects in the ecdysone-induced genetic hierarchies at metamorphosis. We used a reverse genetics approach to identify 11 DHR3 mutants from a pool of lethal mutations in the 46F region on the second chromosome. Two DHR3 mutations result in amino acid substitutions within the conserved DNA binding domain. Analysis of DHR3 mutants reveals that DHR3 function is required to complete embryogenesis. All DHR3 alleles examined result in nervous system defects in the embryo.     

Differential responses to serotonin receptor ligands in an impulsive-aggressive phenotype.

Offensive aggression in golden hamsters is inhibited by 5-hydroxytryptamine (5-HT)1A receptors and facilitated by 5-HT3 receptor activation. As such, we sought to determine whether these receptors function similarly between animals expressing an impulsive-aggressive phenotype, as compared to normal animals. Animals were screened for aggressive and impulsive choice behaviors and categorized into Low-Aggression (L-Agg) and High-Aggression (H-Agg) groups, and then tested for behavior under effective doses of 5-HT1A receptor agonist 8-hydroxy-N, N-dipropyl-2-aminotetralin (DPAT; 0.1 mg/kg and 0.3 mg/kg) or 5-HT3 receptor antagonist tropisetron (0.3 mg/kg) treatment. Low-dose DPAT treatment inhibited both behaviors in H-Agg animals, however yielding more modest effects in L-Agg animals; while high-dose DPAT effects were confounded by side effects on locomotion. Tropisetron, on the other hand, had differential effects between groups, as aggression and impulsive choice were both inhibited in H-Agg animals, while enhanced in L-Agg individuals. In addition, while the effects of the 5-HT1A receptor were limited, the broad effects of 5-HT3 receptor included repetitive and impulsive elements of behavior, pointing to the importance of the receptor's role in the modulation of these particular aspects within the phenotype. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Role of biological indicators in the therapeutic decision in breast carcinoma

Before planning therapeutic strategies for patients at different risks of relapse, it is essential to identify prognostic factors. In addition to important anatomo-pathological prognostic factors such as lymph node status and tumour size, certain biological indicators, such as receptor status and proliferative kinetics, are now regarded as useful tools for prognosis. Tumour cell kinetics is an important prognostic variable in different stages of breast cancer. It is also a useful index for identifying subjects of aggressive tumours in node-negative patients. As far as the relationship between TLI estrogen receptor status and tumor size is concerned, it has been observed that only TLI retains its prognostic significance as regards both time to relapse and overall survival. Lymph node status, receptor status, cell kinetics and c-erbB-2 expression were examined as predictive factors of response. It emerged that not all chemotherapeutic regimens have the same impact in a situation where the disease is evaluated exclusively on the basis of lymph node status. Moreover, receptor status and receptor level significantly condition the response to endocrine therapy. Response rates to chemotherapy increase in highly proliferating tumours, whereas endocrine therapy achieves a better response in ER+ tumours with a low TLI index. Further studies are needed to clarify the role of c-erbB-2 as a predictive factor of response.     

Effects of triazolam, 8-OH-DPAT, and buspirone on repeated acquisition in squirrel monkeys.

The nonserotonergic benzodiazepine, triazolam, was compared with two 5-HT1A receptor agonists, 8-OH-DPAT and buspirone, in squirrel monkeys responding under a repeated-acquisition procedure. In each session, subjects acquired a 4-response sequence by responding sequentially on 3 keys in the presence of 4 discriminative stimuli (colors). Response sequences for each session were maintained by food presentation under a second-order fixed-ratio schedule. Errors produced a brief time-out but did not reset the sequence. In general, all of the drugs produced dose-dependent decreases in overall response rate and increases in the percentage of errors as the cumulative dose was increased. Together, these results indicate that 5-HT1A receptor agonists disrupt learning in squirrel monkeys by producing rate-decreasing and error-increasing effects in a manner comparable with the nonserotonergic benzodiazepine triazolam. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Auditory response areas altered by intermodulation distortion products from background tones

Response areas (RAs) of sensory neurones are dynamically modified by attention, denervation of specific afferent input, blocking inhibition, and by prolonged conditioning with extra-RA stimuli. Here we demonstrate in auditory neurones that the RA is also critically influenced by the background to stimuli. When RAs are measured in the presence of non-excitatory extra-RA tones, new RAs arise at frequencies otherwise not excitatory, as a consequence of non-linear receptor organ transduction. The new RAs can become more sensitive than the RA in quiet conditions such that neurones are then effectively tuned to a new frequency. Thus, even in a modestly complex environment, auditory neurones do not signal a fixed range of sounds but effectively code sounds to which they are otherwise unresponsive.     

NMDA and D2-like receptors modulate cognitive flexibility in a color discrimination reversal task in pigeons.

Reversal and extinction learning represent forms of cognitive flexibility that refer to the ability of an animal to alter behavior in response to unanticipated changes on environmental demands. A role for dopamine and glutamate in modulating this behavior has been implicated. Here, we determined the effects of intracerebroventricular injections in pigeons' forebrain of the D2-like receptor agonist quinpirole, the D2-like receptor antagonist sulpiride and the N-methyl-d-aspartate receptor antagonist AP-5 on initial acquisition and reversal of a color discrimination task. On day one, pigeons had to learn to discriminate two color keys. On day two, pigeons first performed a retention test, which was followed by a reversal of the reward contingencies of the two color keys. None of the drugs altered performance in the initial acquisition of color discrimination or affected the retention of the learned color key. In contrast, all drugs impaired reversal learning by increasing trials and incorrect responses in the reversal session. Our data support the hypothesis that D2-like receptor mechanisms, like N-methyl-d-aspartate receptor modulations, are involved in cognitive flexibility and relearning processes, but not in initial learning of stimulus-reward association. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effect of losartan, an angiotensin II receptor antagonist, on response of cortisol and aldosterone to adrenocorticotrophic hormone

Many imidazole derivatives are shown to inhibit adrenal steroid biosynthesis. The present study was undertaken to examine an effect of another imidazole derivative, losartan (an angiotensin II receptor antagonist), on responses of cortisol and aldosterone to adrenocorticotrophic hormone (ACTH). Nine patients with essential hypertension were given placebo orally for 7 days and 50 mg of losartan for the next 9 days. Response of serum cortisol and plasma aldosterone to intramuscular ACTH injection were determined before and at the end of the treatment with losartan. Serum cortisol and plasma aldosterone significantly increased after ACTH injection in both periods of treatment (placebo and losartan). The increments in these parameters during treatment with losartan were not significantly different from those during treatment with placebo. These results suggest that the inhibitory effect of losartan on adrenal steroid biosynthesis is negligible.     

Altered responding to cholecystokinins and dopaminergic agonists following 6-hydroxydopamine treatment in rats.

In 5 experiments with 265 male Wistar albino rats, production of lesions in the brain dopamine (DA) system by intraventricular injection of 6-hydroxydopamine (6-OHDA) resulted in increased responses to subcutaneous apomorphine (0.5 mg/kg) and reduced responses to methamphetamine (0.15 mg/kg). It also made Ss increase responding to intracerebroventricular (icv) cholecystokinin octapeptide (CCK-8; 0.5–2 μg) and reduce responding to cholecystokinin tetrapeptide (CCK-4; 0.5–2 μg). Response changes were quantified by measuring the level of general activity. Results indicate that DA dysfunction not only affected DA receptor sensitivity but also the sensitivity of the CCK system. The response to CCK-8 was partially blocked by a selective CCK-8 antagonist, proglumide (5 μg, icv), a result suggesting the involvement of the CCK-8 receptor system. Results indicate that manipulation of 1 neuronal system could induce sensitivity changes in another closely related system. (32 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The roles of accumbal dopamine D1 and D2 receptors in maternal memory in rats.

Female rats show enhanced maternal responsiveness toward their young if they have had maternal experiences before. This kind of maternal experience-based memory is critically dependent on the mesolimbic dopamine (DA) system, especially the nucleus accumbens (NA) shell. However, the relative contributions of the two main DA receptor systems (D? and D?) within the shell have not been delineated. This study investigates the roles of dopamine D? and D? receptors in maternal memory by infusing a selective D? antagonist, SCH-23390; a selective D? antagonist, sulpiride; or a combination D?/D? antagonist, cis-Z-flupenthixol, into the NA shell of postpartum female rats. Sulpiride-infused rats showed a significantly longer latency to exhibit full maternal behavior following a 10-day pup isolation period in comparison to the controls that received a vehicle. Cis-Z-flupenthixol disrupted maternal memory to a greater extent, as rats receiving this showed the longest latencies to express maternal behavior. SCH-23390 infusions had only marginal effects. These findings suggest that both the D? and the D? receptor subtypes play a role in the consolidation of maternal memory and they might do so by mediating the motivational salience of pup stimulation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)