Beijing Ethylene Project Begins Production

The ethylene project jointly invested by the Beijing Municipal Government and China National Petroleum and Natural Gas Corporation is one of the state’s key projects planned for the Eight Five-Year Plan period, involving a total investment of RMB 4. 1 billion in capital construction and technical renovation. Known as the No. one project, it is the largest project ever undertaken in Beijing. The project began to be constructed in June 1992 and and is planned to be put into production by

Energy consumption hierarchical analysis based on interpretative structural model for ethylene production

Interpretative structural model(ISM) can transform a multivariate problem into several sub-variable problems to analyze a complex industrial structure in a more efficient way by building a multi-level hierarchical structure model. To build an ISM of a production system, the partial correlation coefficient method is proposed to obtain the adjacency matrix, which can be transformed to ISM. According to estimation of correlation coefficient, the result can give actual variable correlations and eliminate effects of intermediate variables. Furthermore, this paper proposes an effective approach using ISM to analyze the main factors and basic mechanisms that affect the energy consumption in an ethylene production system. The case study shows that the proposed energy consumption analysis method is valid and efficient in improvement of energy efficiency in ethylene production.

Dushanzi Ethylene Project Put into Production

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Energy Efficiency Evaluation Based on Data Envelopment Analysis Integrated Analytic Hierarchy Process in Ethylene Production

Energy efficiency data from ethylene production equipment are of high dimension, dynamic and time sequential, so their evaluation is affected by many factors. Abnormal data from ethylene production are eliminated through consistency test, making the data consumption uniform to improve the comparability of data. Due to the limit of input and output data of decision making unit in data envelopment analysis(DEA), the energy efficiency data from the same technology in a certain year are disposed monthly using DEA. The DEA data of energy efficiency from the same technology are weighted and fused using analytic hierarchy process. The energy efficiency data from different technologies are evaluated by their relative effectiveness to find the direction of energy saving and consumption reduction.

Improvement of low temperature activity and stability of Ni catalysts with addition of Pt for hydrogen production via steam reforming of ethylene glycol

Hydrogen production by steam reforming of ethylene glycol(EG) at 300℃ was investigated over SiO2 and CeO2 supported Pt–Ni bimetallic catalysts prepared by incipient wetness impregnation methods. It was observed that impregnation sequence of Pt and Ni can affect the performance of catalysts apparently. Catalyst with Pt first and then Ni addition showed higher EG conversion and H2 yield owing to the Ni enrichment on the surface and the proper interaction between Pt and Ni. It was observed that although SiO2 supported catalysts exhibited better activity and H2 selectivity, CeO2 supported ones had better stability. This is attributed to the less coke formation on CeO2. Increasing Pt/Ni ratio enhanced the reaction activity, and Pt3–Ni7 catalysts with 3 wt% Pt and 7 wt% Ni showed the highest activity and stability. Ni surficial enrichment facilitated the C-C bond rupture and water gas shift reactions;and Pt addition inhibited methanation reaction. Electron transfer and hydrogen spillover from Pt to Ni suppressed carbon deposition. These combined effects lead to the excellent performance of Pt3–Ni7 supported catalysts.

Discrepancies between targets and achievements in industrial forest production and export in Tanzania

It is important to revisit our plans and compare what was ideally targeted against what was actually achieved in implementation. In comparing the achievements with targets, strengths or weaknesses of established strategies can be accepted or corrections implemented since a plan also outlines some strategies for achieving the targets set. In this study, achievements in production and export of industrial forest products, i.e., sawn wood, plywood, chipboard and fibreboard, paper and paperboard and industrial round wood, are compared against targeted figures for 1996 for Tanzania. Discrepancies were obtained by subtracting targeted from achieved values and expressed both as absolute and relative differences in terms of the targeted values, with a negative sign for pro- duction where achievements were less than targets and a positive sign when achievements were higher than targets. Values achieved ranged from 4%-100% of the targeted values, depending on the product, and were only higher than the targeted value for industrial round wood. Possible causes of the discrepancies are inefficiency of parastatal companies, low private investment, sub-maximal in- dustrial operation and plant inefficiencies. Discrepancies could also result from unrealistic data used in planning due to difficulty in data availability and poor intra- and inter-sectoral coordination. The implications of these discrepancies are low contributions of the wood-based industry to the national economy, increased import substitution of wood-based products, increased socio-economic and environmental degradation and decreased integrity in planning and policy making.

China Will Increase Ethylene Production Capacity Totaling Around 15 Mt/a by 2025

It is expected that by 2025 China will add a total ethylene production capacity of 12 Mt/a,and in the next decade the total ethylene capacity will reach 35―40 Mt/a.The grassroots 11 new steam cracking units slated for production by the end of 2022 are listed in the following Table.

Achievements and future work of oil and gas production engineering of CNPC

This paper summarizes the latest achievements and technological progress in oil and gas production engineering of China National Petroleum Corporation(CNPC) and discusses the main four challenges faced: developing low quality resource at low oil price; keeping stable production of mature oilfields when well oil production drops year by year; low systematic efficiency, high cost, prominent environmental protection issue and short of technological strategy for high water cut ratio and high oil recovery ratio oilfields; and lacking of high level horizontal well drilling and completion technology to develop unconventional and deep reservoirs. Three technological development directions to address these challenges are put forward: developing fracture controlling stimulation and well factory to produce low quality resource economically, developing re-fracturing technology for old wells in mature oilfields, promoting the fourth generation separate layer water injection technology to stabilize the production of mature oilfields; innovating new technologies of water flooding with nano-material, injecting and producing through one well.

Ethylene Production and 1-Aminocyclopropane-l-Carboxylate （ACC） Synthase Gene Expression in Tomato （ L ycopsicon esculentum Mill.） Leaves Under Enhanced UV-B Radiation

Tomato （Lycopslcon esculentum Mill.） plants grown in a greenhouse were irradiated with two different levels of UV-B, namely 8.82 （T1） and 12.6 kJ/m^2 per day （T2）. Ethylene production, 1-aminocyclopropane-1-carboxylate （ACC） content, 1-（malonylamino） cyclopvopane-1-carboxylic acid （MACC） content, gene expression of ACC aynthase （EC 4.4.1.14）, and ACC oxidase activity in tomato leaves were determined. The results Indicated that ACC content, the activity of ACC synthase and ACC oxidase, and ethylene production Increased continuously under low doses of UV-B radiation, whereas at high doses of radiation these parameters Increased during the first 12 d and then started to decrease. The MACC content increased continuously over 18 d under both doses of UV-B irradiation. The changes in ACC content, ACC synthaae activity, ACC oxidase activity, the transcriptional level of the ACC synthase gene, and ethylene production were consistent with each other, suggesting that ACC synthase was the key enzyme in ethylene biosynthesis and that ethylene production in tomato leaf tissues under UV-B radiation could be regulated by the expression of the ACC synthase gene. The results also indicate that the change in ethylene metabolism may be an adaptive mechanism to enhanced UV-B radiation.

The template-assisted zinc ion incorporation in SAPO-34 and the enhanced ethylene selectivity in MTO reaction

The SAPO-34 catalyst was fine-tuned with zinc cations through a straightforward template-assisted ion incorporation (TH) process, without the necessary template pre-removal and the preparation of NH4- SAPO-34 intermediate, which is more facile, efficient and cost-effective than the conventional ion exchange process. The template-assisted zinc cations incorporated SAPO-34 catalysts were characterized by XRD, XRF, N2 adsorption-desorption, XPS, SEM, EDX,NMR, respectively. Enhanced selectivity to ethylene and ratio of ethylene to propylene in MTO reaction are observed over the zinc cations modified SAPO-34 catalysts, due to the facilitated formation of lower methylbenzenes that favour the ethylene gen eration, as well as the increased diffusion hindrance originated from the zinc cations incorporation and the facil让ated generation of aromatics compound.

Analysis in Results Production Mode of Chinese Media Type Think-Tank

Purpose/Significance:Through the analysis in the results production mode of the Chinese media type think-tank based on the media operation structure and communication platform,found there are structure and cooperation problems of spread and research line,team cooperation and transformation problem of research and spread,research production and media production positioning problem,and spread channel widening problem,this paper tries to provide a useful suggestions for the current traditional media transformation encourage the media type think tank go abroad,raise the international influence,personalize the products,make it into Boutique,become a brand and the development strategy of the new think-tank with Chinese characteristics.Methods/Processes:analysis the results production model of media-based think tank from four aspects:category,characteristics,existing problems and development trend.Results/conclusion:the achievements of Chinese media-based think tanks will follow a new development trend through the establish of cooperative innovation system,achievements make and press system of“all media tendency”,market-oriented transformation theory,brand strategy,and exerting international influence.

A SUCCESSFUL PARADIGM IN COMMERCIALIZATION OF HI-TECH ACHIEVEMENTS——Fujian Castech Crystals Inc.and its non-linear crystal products

Non-linear crystal materials BBO and LBO stand for the low-temperature phases of barium metaborate beta-BaB2O4 and lithium triborate LiB3O2. Both are hi-tech products marketed by the Fujian Castech Crystals Inc., a business entity affiliated to the CAS. The successful development of the two was honoured with a special prize, a first-grade prize and a second-grade prize of the CAS Awards for S&T Progress in 1986, 1989 and 1990 respectively. Also, they were crowned with a prize of the

Biotransformation of ethylene glycol by engineered Escherichia coli

There has been extensive research on the biological recycling of PET waste to address the issue of plastic waste pollution,with ethylene glycol(EG)being one of the main components recovered from this process.Therefore,finding ways to convert PET monomer EG into high-value products is crucial for effective PET waste recycling.In this study,we successfully engineered Escherichia coli to utilize EG and produce glycolic acid(GA),expecting to facilitate the biological recycling of PET waste.The engineered E.coli,able to utilize 10 g/L EG to produce 1.38 g/L GA within 96 h,was initially constructed.Subsequently,strategies based on overexpression of key enzymes and knock-out of the competing pathways are employed to enhance EG utilization along with GA biosynthesis.An engineered E.coli,characterized by the highest GA production titer and substrate conversion rate,was obtained.The GA titer increased to 5.1 g/L with a yield of 0.75 g/g EG,which is the highest level in the shake flake experiments.Transcriptional level analysis and metabolomic analysis were then conducted,revealing that overexpression of key enzymes and knock-out of the competing pathways improved the metabolic flow in the EG utilization.The improved metabolic flow also leads to accelerated synthesis and metabolism of amino acids.

Temperature effects on ethylene and methane production from temperate forest soils

Change in temperature affects the activity of soil microorganisms.However,there is limited knowledge about temperature effects on ethylene(C2H4) and methane(CH4) production from forest soils.Topsoil samples(0―5 cm) collected from different temperate forest stands(e.g.,Pinus sylvestris L.,Cryptomeria japonica,and Quercus serrata) were used to compare C2H4 and CH4 production from soils at temperature from 5 to 35℃ under oxic and anoxic conditions.The rates of C2H4 and CH4 production from soils under oxic conditions were measured by using inhibition of acetylene(C2H2) and carbon monoxide(CO).The consumption of C2H2 by soils at an initial concentration of c.250 Pa C2H2 was negligible at 5 and 15℃,but it was significantly increased at 25 and 35℃.The presence of 2 kPa CO in the headspace gases tended to decrease the consumption of C2H2 by soils at high temperature.The Q10 values for the soil C2H2 consumption ranged from 2.3 to 3.8,and there were no significant differences in Q10 values between these topsoil samples.The rate of CH4 production from each sample under oxic conditions was larger than the soil C2H4 production at 5―35℃,particularly at low temperature,and presented a smaller Q10 value.Ethylene production from soil after 1 week of anoxic incubation at 5―35℃ was larger than the soil CH4 production,and presented a larger Q10 value.However,CH4 produc-tion from Quercus serrata forest soil and its response to temperature increased significantly with in-cubation time.Long-term anoxic conditions of in situ upland forest soils are normally not prevalent,so it can be reasonably concluded that there is a larger C2H4 production rather than CH4 production under temperate forest stands due to heavy rainfall in summer.

With Respect to Academic Achievement, How Important is Class Size?

This essay will discuss how important the influence of class size is on academic achievement.

Protection of Innovative Achievements,Spatial Spillover,and Internal Structural Upgrading of the Productive Service Industry-Empirical Evidence from 28 Provinces in China

This study measured the level of innovation achievement protection and the degree of internal structural upgrading of the productive service industry in 28 provinces of China from 2000 to 2022.Exploratory spatial analysis methods were used to test the spatial correlation between the two variables,and the spatial impact of innovation achievement protection on the optimization of the internal structure of the productive service industry was examined at the national and sectoral levels.The results showed three main aspects of this system.(1)The agglomeration level of innovation achievement protection and internal structure optimization of the productive service industry between regions in China continued to increase during the sample period,and there was a clear similarity and synchronicity in the spatial evolution of the two variables.(2)The overall improvement in the protection level of innovative achievements is conducive to promoting the internal structural upgrading of China’s productive service industry.However,there are significant differences in the degree to which the protection of innovative achievements affects the internal structural upgrading of the productive service industry in the four major regions of the East,Central,Northeast,and West.The protection of innovative achievements in the East and Central regions significantly promotes the internal structural optimization of the productive service industry,while this effect is not significant in the western and northeastern regions.(3)The results of the robustness test indicate that the impact of internal structural upgrading of the productive service industry in the previous year on the level of innovation achievement protection is not significant.The interference from abnormal values of the internal structural upgrading of the productive service industry in various regions and the influence of municipalities directly under the central government on the regression results are not significant.After replacing the main variable,the coefficient of the innovation achievement protection level remained significantly positive.The conclusions of this study supplement and improve the theory of innovation achievement protection and industrial transformation and upgrading,providing decision-making support for improving the level of innovation achievement protection and promoting the internal structural upgrading of the productive service industries in China.

地质信息产品体系框架研究

加强地质成果产品化和产品服务化,是更好地实现地质成果价值的关键。通过开展地质信息产品基础问题研究,从产品的基本概念、产品属性、产品层次、产品分类出发,构建了地质信息产品体系框架,形成了数据、地质图、地学科普、馆藏资料、出版物、标准规范、软件、仪器设备与方法八大类产品系列及产品元数据和产品与服务的分级分类。在此基础上,以地质信息产品体系为指导,以用户多元化需求为导向,开展产品设计与开发规划,指导设计和开发针对不同层次用户的地质信息产品,以提升中国地质信息服务的精准化、规模化和高效化,助力新一轮找矿突破战略行动。

油气企业科技创新人才价值溯源分成评估

科技创新是发展新质生产力的核心力量,而科技创新人才是创新过程中的第一要素。作为油气生产的主要参与主体,油气企业要实现高水平科技自立自强,归根结底要依靠拥有高水平创新能力的人才队伍。为了激发科技人才创新活力动力,在人才价值创造与评估现状分析的基础上,依据生产全要素视角下的科技创新价值分享理论与方法,建立了油气企业科技创新人才价值溯源分成评估方法。研究结果表明:(1)油气企业科技创新是一个系统性的复杂过程,匹配油气企业科技创新特征、具有产业适应性的人才价值评估理论与方法较少;(2)油气企业科技创新人才价值溯源分成,是以油气科技创新成果经济价值评估结果为前提对参与成果创造的团队和个人按照实际贡献进行价值追溯与量化的过程,需要通过对单项科技创新成果经济价值溯源和科技创新成果完成人价值溯源两次溯源来实现;(3)以创新成果为导向的科技创新人才价值贡献率是人才价值溯源分成的核心参数,由完成人参与度、完成人创新度、完成人贡献度为内容的综合评估指标体系共同确定。结论认为,该方法为加快建立以创新价值、业绩、贡献为导向的人才评价体系提供了参考,能够有效解决人才在油气科技创新活动中的经济价值量化问题,对推动高水平科技自立自强有现实意义。

基于生产托管服务的农业科技成果转化新模式探析——以安徽颍州农业社会化服务科技创新基地为例

加速农业科技创新成果转化是推进现代农业发展的主要动力,对推动乡村产业振兴具有重要现实意义。系统阐述了目前安徽省农业科技成果转化的主要模式,并综合分析了成果转化过程中存在的成果属性、转化动力、转化机制及农技推广模式等方面的问题。结合新阶段对科技创新和成果转化联动发展以及农业生产托管高质量发展的要求,提出了基于农业社会化服务的农业科技成果转化模式的理论框架,并以安徽颍州农业社会化服务科技创新基地为例,分析了农业生产托管服务在推进科技创新和促进成果高效转化方面的正向作用,阐述了农业科研院所、农技推广系统、托管组织等主体在科技创新与成果转化中的联动协作机制。提出了一条可行的农业科技成果转化新模式——基于生产托管的农业科技成果转化模式,以期为推动农业科技创新成果转化、助力农业新技术推广到位、助推乡村振兴提供参考依据。

职业教育发展与新质生产力提升——来自中国274个城市的证据

利用2010-2022年中国274个城市的数据,分析职业教育发展对城市新质生产力水平的影响及其作用机制。研究结果显示:职业教育显著提升了城市新质生产力,这一结论经稳健性检验后仍然成立。机制分析发现,职业教育通过促进技术成果市场化和产业数字化,提升了城市新质生产力水平。异质性分析表明,职业教育发展对城市新质生产力的影响呈现多维异质性,职业教育对中西部区域、教育经费投入大的城市和新质生产力分位数较高城市的促进作用更为明显。据此,应紧扣社会需求,大力推动职业教育高质量发展;畅通转化渠道,充分发挥职业教育加快技术成果市场化和产业数字化的机制作用;遵循比较优势,制定差异化职业教育发展政策。