“放管服”背景下加强油气监管的思考与建议

自然资源部在油气监管领域落实"放管服"改革,通过推行油气信息公示制度,使监管过程更加公开,油气矿业权人诚信自律程度加强,政府监管效能得以提高,但仍存在无法实现完全随机抽取检查人员、未完成法定最低勘查投入不足情况比较突出、内部管理信息共享不够等问题。油气监管面临诸多新形势和新要求,包括生态文明建设要求加强绿色勘查开采监管,油气上游放开带来监管主体更加多元,新实行的油气探采合一制度要求加强勘探开发过程监管,国家关于加强信用监管的要求。油气监管现状与新要求在监管制度、监管力量、监管成果使用、信息化支撑等方面还存在差距,为更好地适应新要求,持续加强油气勘查开采监督管理,提出完善油气监管制度体系顶层设计,加强油气探采合一制度下勘查开采过程和重要节点监管,培育油气监管专业机构并加大科技手段使用,推进信用监管和分类监管,构建联合监管和服务相结合的新模式等政策建议。     

伴生放射性矿开发利用辐射环境安全监管法规体系的现状

伴生矿开发利用会使得天然放射性核素通过废气、废液及固体废物等途径进入环境。随着伴生矿开发利用类别和规模的增大,其造成的环境辐射污染也日益增加。"十三五"规划对伴生矿监管提出了要求,明确了伴生矿监管的重要性。本文梳理了从上层法律到参考性监管文件的伴生矿现有法规标准体系,并总结了现状。当前伴生矿辐射环境安全法规标准体系的问题包括体系不完善、适用性不足和法规标准间存在不自恰等。结合监管关注的要点,参考其他行业的标准体系,对伴生矿监管需求进行了研究分析,提出了完善伴生矿开发利用行业法规标准体系的针对性建议,给出了一套完整的适用于伴生矿的法规标准体系,进一步加强对伴生矿开发利用企业的监管,保障辐射环境安全。     

大豆磷脂和VE抗氧化、调节血脂功能的研究

为了探讨大豆磷脂和VE抗氧化、调节血脂的功能,分别建立抗氧化和调节血脂两个试验动物模型。每个模型均分成不同剂量组,经灌胃同一功能性食品溶液(其成分为大豆磷脂和VE)30 d后,取抗氧化模型组小鼠血检验其过氧化物歧化酶(SOD)、丙二醛(MDA)、谷胱甘肽(GSH)3个指标的含量,取调节血脂模型组大鼠血检验其血清总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL-C)3个指标的含量。结果表明大豆磷脂和VE具有较明显的抗氧化、调节血脂的功能。     

铀酰配位介导咔唑三羧酸超分子组装体的结构演变北大核心CSCD

作为一类典型的金属-有机框架材料(MOFs),基于锕系金属节点的MOFs具有其独特的锕系-配体键合方式。然而,这些配位相互作用如何参与并影响有机配体的晶格组装过程仍有待研究。在本工作中,以咔唑三羧酸有机配体与铀酰离子的配位组装为例,通过控制合成条件详细研究了铀酰配位作用对咔唑三羧酸配体晶格组装过程的调控。单晶结构分析表明,随着铀酰金属节点的引入,咔唑三羧酸超分子组装体实现了从氢键-有机网络结构向金属-有机网络结构的逐级演变。在这一调控过程中,不同咔唑三羧酸间的连接方式由羧基氢键对逐渐被铀酰配位作用取代,二维网络结构也从六重穿插非平面网络转变为平面超分子网络和金属-有机配位网络。相关转变过程主要表现在羧基不断参与铀酰中心的配位作用,这一过程也得到了红外光谱的证实。通过本工作的开展,成功揭示了铀酰-配体配位作用调控无机-有机多孔材料合成的分子机制及相关材料结构演变的详细过程。     

结构调整是造纸行业发展的主线

分析了造纸行业发展面临的产业政策环境，对造纸行业新的结构调整政策进行了解读和评论，指出了造纸行业结构调整面临的机遇和挑战。     

Multiplicity of mechanisms of carbon catabolite repression involved in the synthesis of alcohol oxidase in the methylotrophic yeast Pichia pinus

The effect of various carbon compounds on the synthesis of alcohol oxidase in a medium with methanol was studied in the wild type strain of Pichia pinus as well as in gcr1 and ecr1 mutants defective in glucose and ethanol repression of methanol metabolic enzymes, respectively. Compounds repressing the synthesis of alcohol oxidase in the wild type strain were divided into four groups. Repression of alcohol oxidase by compounds of the first group (glucose, fructose, mannose, galactose, L -sorbose and xylose) was impaired only in the gcr1 mutant and that by compounds of the second group (ethanol, acetate, 2-oxoglutarate and erythritol) only in the ecr1 mutant. Repression by compounds of the third group (malate, dihydroxyacetone) was not impaired in both these regulatory mutants and that by compounds of the fourth group (succinate, fumarate, L -arabinose, sorbitol, salicin, xylitol and cellobiose) was partially reduced in both gcr1 and ecr1 strains. Mutation gcr1 causes a significant decrease in phosphofructokinase activity. It also led to a six- to seven-fold increase in intracellular pools of glucose-6-phosphate and fructose-6-phosphate and to a two-fold decrase in the intracellular pool of fructose-1,6-bisphosphate. In ecr1 strains, a decrese in 2-oxoglutarate dehydrogenase activity accompanied by an increae in activities of NAD- and NADP-dependent isocitrate dehydrogenases and NAD- and NADP-dependent glutamate dehydrogenases was demonstrated. The intracellular pool of 2-oxoglutarate was increased 2·5-fold in ecr1 strains. Genes GCR1 and ECR1 are not linked. The mechanisms of catabolite repression of alcohol oxidase in methylotrophic yeasts are discussed.     

宝钢300MVA变压器有载调压AVR和AQR自动装置

宝钢变电所配置２台日产３００ＭＶＡ的有载调压变压器，介绍了两种调整装置——自动电压调整装置（ＡＶＲ）和白动无功功率调整装置（ＡＱＲ）的原理．     

无线局域网及其在电信接入市场的应用

本文简要介绍了无线局域网（IEEE802.11系列）的相关概念与技术，分析了无线局域网技术的发展前景及在电信接入市场的应用。     

The sticky buffer flow control for the ATM

Data from different applications — voice, video, file transfer, interactive — will be multiplexed in the future over broadband integrated services digital networks (BISDN). Data are segmented into 48-byte blocks prefixed by a 5-byte header and transported over the network using the asynchronous transfer mode (ATM).

An ATM connection-request is a contract between the user and the network; the user specifies a rate requirement, delay constraints, a bound on the cell-loss probability and other quality of service parameters. If the network can meet these requirements, a connection is made. Bursty traffic producing peak traffic rates in excess of the projected average rate could result in congestion and lead to performance degradation. As a result, the network might no longer be able to deliver the negotiated quality of service to existing connections. To lessen the chance of congestion, input rate control must be implemented.

This paper contains a performance analysis of the sticky buffer (SB), a moving window input rate control scheme intended to limit the rate at which input traffic may enter a network. Policing is achieved by buffering and hence delaying the entry of ATM-cells into the network. The scheme is determined by parameters (R,T) which specify that no more than R ATM-cells are permitted to enter the network in every window of size T cells. We present an exact analysis, deriving the probability generating function of the queue length distribution. A comparison with the leaky bucket is given. Our numerical examples show the required buffer size is comparable to that required by the leaky bucket.