基于投入产出模型的高技术制造业产业链区域间协同研究——以鄂湘赣新一代信息技术产业协同为视角

为研究新一代信息技术产业在鄂湘赣的产业链协同发展,本文运用里昂惕夫投入产出模型,首先对新一代信息技术产业的后向(前向)直接、间接关联产业部门分别进行定量化分析,构建新一代信息技术产业的产业链,并得出新一代信息技术产业链的主要关联部门。通过计算Ghosh逆矩阵和Leontief逆矩阵的平均值矩阵F,测度鄂湘赣地区产业链主要关联部门间的成本推动效应和需求拉动效应。基于此,运用平均波及步数法测度鄂湘赣3省之间新一代信息技术产业链的关联程度,最终得出鄂湘赣3省新一代信息技术产业基于产业链进行协同发展的对策建议。     

中国绿色技术创新的动态产业升级效应研究——基于异质环境规制的调节

采用2004~2017年省际面板数据及门槛计量技术,实证分析了命令型、自愿型和经济型三类环境规制对绿色技术创新驱动产业升级的异质动态调节影响。研究发现,绿色技术创新显著驱动了国内产业升级,但绿色技术创新的产业升级效应具有明显的倒“U”型动态演化特征;环境规制在绿色技术创新驱动产业升级过程中发挥着“调控器”功能,不仅可扭转绿色技术创新对产业升级的不利影响,还有助于提升绿色技术创新的产业升级效应;绿色技术创新对产业升级的动态影响具有显著的异质环境规制调节特征,在命令型环境规制和经济型环境规制调节下均呈现正向“U”型特征,在自愿型环境规制调节下具有正向倒“U”型规律;现阶段环境规制的调节效果存在显著差异,从调控手段来看,命令型环境规制最佳、经济型环境规制次之、自愿型环境规制较弱。从空间差异来看,东部地区最明显、西部地区次之、中部地区较差。     

Assessment of LIBS for Spectrochemical Analysis: A Review

Abstract

This review assesses the applications of laser-induced breakdown spectroscopy (LIBS) for the analysis of a variety of samples, including biomaterials (teeth, nail, hair, gallstones, and kidney stones, etc.), food materials (fruits and vegetables, milk, salt, nutritional supplements, etc.), medicinal plants, industrial waste, liquid samples, etc. In addition, for the first time the identification of cholesterol and pigment stones was performed on the basis of atomic lines of different elements and molecular bands of C₂ molecules present in the LIBS spectra of gallstones. Chemometric techniques such as principal component analysis (PCA) was also applied to LIBS data for rapid identification/classification of different gallstone samples. LIBS analysis of toxic/heavy elements present in vegetables (spinach, tomato) and rice is also presented in this review. It was observed that vegetables grown near industrial areas are rich in several toxic metals like Pb and Cr. The wastewater samples from different industries were also analyzed by recording their spectra using a liquid jet. These results clearly demonstrate the ability of LIBS technique as an instant monitoring device to detect heavy metals present in liquid samples. Finally, this review shows that LIBS is a versatile analytical technique with unlimited applications.     

Erprobung des Flächenmassemeßsystems 24024 in der Industrie

Radiometrische Flächenmasse-Meβanlagen haben hente einen festen Platz bei der Steuerung und Überwachung von Herstellungsprozessen flächenhafter Halbzeuge. Eine neue Generation von Anlagen dieser Art ist durch den Einsatz des Mikrorechners K 1520 entstanden. Es wurde möglich, für jede Meβgut/Strahlerkombination den Meβbereich so zu kalibrieren, daβ die Anzeige in digitaler Form direkt in Flächenmasse- bzw. Dickeneinheiten erfolgen kann. Die Erprobung erfolgte im Walzwerkeinsatz. Es wurde je eine Anlage zur Sortierung von Stahlblechen an einer Querteilanlage und zur Dickenregelung eines Walzgerüstes eingesetzt. Probleme im Zusammenhang mit der “Vor-Ort”-Kalibrierung, der Anpassung an die jeweilige Meβaufgabe sowie die Bedienbarkeit werden dargestellt. Den Abschluβ bilden Erfahrungen im Betriebsverhalten und Fragen der Zuverlässigkeit.     

30 years of production of highly enriched nitrogen-15 in the GDR

Almost 30 years ago, the stable isotope ¹⁵N had covered a wide field of application in science and technology. With the preparation of the first smaller amounts of ¹⁵N in 1958, an intensive work of research and development started for the production, analysis, and application of ¹⁵N in the GDR. In this publication, activities of research and development for ¹⁵N production using the principle of chemical exchange in the system NO _x /HNO₃ from a laboratory scale to the introduction into chemical industry are described and new projects reported.     

Radiotracer Evaluation of Laterite and Coal-Ash Dust Discharged into Environment

Abstract

In Elbasan steel plant a large quantity of dust is discharged into the environment by laterite fluidized bed calciner and the coal boiler for steam production.

By means of radiotracers the erosion of the laterite in the fluidized bed calciner was estimated experimentally. Based on the experimental data a mathematical model has been constructed for the erosion, which permits calculation of the mass of the dust deriving from erosion when the granulometric composition of the mineral on entry to the calciner is known.

The efficiency of two types of cyclones in laterite calciner and coal boiler, for three granulometric classes of laterite dust and coal-ash was studied.

Ways for reducing the quantity of dust discharged into environment are proposed.     

Iron Removal from Phosphoric Acid by Paramagnetism

A two-step separation technique was used in the laboratory to purify industrial grade phosphoric acid. Step 1 used a hydrocyclone, and step 2 used paramagetism. A total of 78.4% of the iron was removed without loss of phosphorus, mostly through step 1. In addition, 13% of the initial chromium was removed. Probably recycling or enhanced fields would enhance the removal of iron and chromium.     

Automated Flow Injection Method for Monitoring Total Cyanide Concentration in Petroleum Refinery Effluents Using Ninhydrin as Color Reagent

Abstract

An automated flow injection system was developed for monitoring cyanide concentration in effluents from petroleum refineries. The method takes advantage of the reaction of cyanide ions with ninhydrin in basic medium in a flow injection system. A linear range of 0.01 to 0.04 µg mL^?1 was obtained with a detection limit of 1.5 ng mL^?1 by using 500 µL sample injection, with an analytical throughput of 30 samples hr^?1, excluding sample pretreatment by distillation if required. Regarding interferences, cyanide can be determined in the presence of 100 mg L^?1 of thyocianate and sulfide, both species normally found in industrial effluents. For total cyanide determination, strong acid distillation is recommended due to the presence of cyano‐metallic complexes in the refinery effluents. The method was validated by analyte addition and results compared with the standard methodology proposed by the American Public Health Association (APHA). The more significant advantage of the proposed method is the lack of use of carcinogenic reagent such as pyridine and psychotropic compound such as barbituric acid, both used in the recommended method by APHA. Thus, the proposed method is really a friendly analytical procedure.     

温州市海洋资源可持续利用对策研究

在对温州市海洋资源开发现状分析的基础上，提出了海洋资源可持续利用的原则。海洋资源的开发利用依赖于海洋产业的发展，据此从海洋产业发展的角度出发提出针对温州海洋资源的可持续利用策略。同时，由于海洋资源具有明显的地域性，因此尚须从分区角度研究海洋资源可持续利用，并提出温州海洋资源开发利用应按6个区分别进行开发和管制。最后，提出了实现海洋资源可持续利用的保障措施。     

中国金融结构与产业结构经济结构关系的实证研究

本文依据协整理论,利用向量误差修正模型,对中国金融结构与产业结构、经济结构之间的关系进行了实证研究.Granger因果检验的结果表明,中国正处于从转轨经济向成熟的市场经济过渡的发展阶段.同时,中国的金融结构与经济结构之间存在不协调.据此我们得出了相应的政策含义.