回火温度对16Col4Ni10Cr2Mo钢断裂韧度和抗应力腐蚀性能的影响

研究了回火温度对１６Ｃｏｌ４Ｎｉｌ０Ｃｒ２Ｍｏ钢断裂韧度Ｋ_（ＩＣ）和抗应力腐蚀性能Ｋ_（ＩＳＣＣ）的影响。发现５１０℃以下回火Ｋ_（ＩＣ）和冲击值ａ_ｋ的变化一致，都表现出回火马氏体脆性，但在回火脆性区内Ｋ_（ＩＣ）不降低。在二次硬化峰之前Ｋ_（ＩＳＣＣ）值很低，这是二次硬化钢不能在硬化峰之前回火使用的重要原因。     

Mineralization of an azo dye Acid Red 14 by photoelectro-Fenton process using an activated carbon fiber cathode

The mineralization of an azo dye Acid Red 14 (AR14) by the photoelectro-Fenton (PEF) process was studied in an undivided electrochemical reactor with a RuO₂/Ti anode and an activated carbon fiber (ACF) cathode able to electrochemically generate H₂O₂. Anodic oxidation and UV irradiation of AR14 were also examined as comparative experiments. Results indicate that the electro-Fenton process yielded about 60–70% mineralization of AR14, while the photoelectro-Fenton could mineralize AR14 more effectively (more than 94% total organic carbon (TOC) removal) even at low current densities assisted with UV irradiation after 6 h electrolysis. The mineralization current efficiency (MCE) of the PEF process increased with the increasing AR14 concentrations. In addition, the initial solution pH ranging from 1.49 to 6.72 had little influence on the TOC removal probably due to the formation of organic carboxylic acids which balanced the pH increase caused by the cathodic generation of hydrogen gas. The ACF cathode showed a long-term stability during multiple experimental runs for degradation of AR14, indicating its good potential for practical application in treating refractory organic pollutants in aqueous solutions.     

Positive ion AMS with a single-stage accelerator and an RF-plasma ion source at SUERC

The new single-stage accelerator mass spectrometer at SUERC can also accept positive ions. Potential benefits of positive ion measurement with suitable ion sources are more convenient sample form, smaller sample size, a variety of available charge states and maybe new applications. We have begun with oxygen isotope analyses to demonstrate destruction of interfering molecules.     

Baubewilligungspflichtige Maßnahmen; keine fristgerechte Erledigung einer unzulässigen Bauanzeige

Eine nicht fristgerechte Mitteilung über die Bewilligungspflicht eines lediglich angezeigten Bauvorhabens kann die rechtlich erforderliche Baubewilligung nicht ersetzen.     

Formation of Nd2Fe14B hydride by milling of anhydride particles in toluene in a closed reactor

When milling micrometer thin Nd₂Fe₁₄B platelets, of an average 1–2 mm diameter, in toluene in a closed reactor, part of the toluene decomposes at the surface of the platelets and yields nascent hydrogen and carbon/low hydrocarbons. The hydrogen diffuses into the Nd₂Fe₁₄B platelets and the carbon forms a thin surface passivation layer of the platelets, forming the stable Nd₂Fe₁₄BH _x ,x ≤ 5, hydride at room temperature. On heating in a calorimeter, the hydrogen desorbs off the sample with a well-defined endotherm between 370 and 425 K. An N₂ gas atmosphere, if used during the heating, facilitates the H-desorption process with the modified kinetic parameters. For example, the enthalpy of the H-desorption ΔH and the related activation energyE _a have the measured values ΔH = 153 J/g andE _a = 58·2 kJ/mol in argon and ΔH = 256 J/g andE _a = 41·6 kJ/mol in N₂. It is argued that N₂ gas has a fast reaction with the H atoms desorbing off the thin sample platelets and forms NH₃ gas with an instantaneous decrease of the total external gas pressure at the sample. This supports the fast desorption of H atoms in the sample with the modified desorption kinetics in N₂ gas.     

北京大学加速器质谱装置及^14C测量

北京大学加速器质谱装置（PKUAMS）自1991年建丘以来，已开展许多应用研究并取得了一系列成果。本文系统介绍PKUAMS装置及其14C测量。     

Characterising urban concentration and land-use diversity in simulations of future land use

This paper presents two sets of functional indicators that were implemented and tested for the assessment of spatial aspects of future land-use configurations as simulated by a land-use model. This is potentially useful for the ex-ante evaluation of spatial planning policies. The indicators were applied in a Dutch case study and relate to two important themes in Dutch spatial planning: compact urbanisation and mixing of land uses. After a short introduction of these themes, the sets of indicators are presented which are used for their evaluation. These indicators are applied to simulations based on two scenarios for land-use development in the Netherlands up to 2030. After a discussion of the results we conclude that the combined application of land-use models and indicators produces new and potentially useful information for policy makers, although both the model and the associated indicators are still in a state of development.     

适应市场需求努力开发生产优质产品：——就14MnNbq的生产看轧板厂工序能力

本文以 1 4 Mn Nbq板生产状况为基 ,分析轧板厂轧机改造后的工序能力 ,找出问题 ,提出措施。努力开发生产出用户满意的产品。     

Gaststätte mit Gastgarten; Immissionsschutz; subjektiv-öffentliche Nachbarrechte

Bei einer Gastst?tte mit Gastgarten hat – neben der Gewerbebeh?rde – auch die Baubeh?rde mittels Vorschreibung von Auflagen Sorge zu tragen, dass vom Gastgarten ausgehende L?rmbel?stigungen vermieden werden.