钢渣煤矸石制取复合铁铝混凝剂及混凝效果研究

利用钢渣和煤矸石中的金属成分制取复合混凝剂,采用正交试验研究混凝剂的制取及混凝效果的影响因素,包括混酸的加入量,混凝剂的加入量以及pH值。实验处理印染废水,测定CODCr去除率和色度去除率。其正交试验显示：当混酸投加量为15 mL,混凝剂的投加量为15 mL/L-1,pH值为6时,CODCr的去除率可达85%以上,色度去除率可达90%以上。讨论了处理生活污水时pH值和混凝剂投加量对混凝效果的影响。     

臭氧-活性炭-过氧化氢法处理染料废水的研究

采用臭氧-活性炭-过氧化氯法对染料废水进行了处理．考察了添加剂、废水初始pH值对染料废水中COD、色度、挥发酚及氰化物去除率的影响。结果表明，臭氧-活性炭-过氧化氢联合的方法对染料废水中COD、色度、挥发酚及氰化物的去除很有效，去除率均达96％以上。最佳条件下，COD、挥发酚达国家三级排放标准：色度、氰化物达国家一级排放标准。     

电催化氧化技术深度处理染料废水研究

染料废水具有有机物浓度高、成分复杂、色度高、难降解物质多等特点,成为了水处理领域的一大难题。采用电催化氧化技术对某染料废水污水处理厂二沉池出水进行深度处理。考察了电流密度、p H值、水力停留时间对COD和色度去除的影响。研究结果表明,在电流密度7 m A/cm~2,p H值5~6,水力停留时间2 h条件下,COD和色度的去除率分别为68%、80%,出水可以达标排放。     

Fenton试剂法深度处理造纸废水的实验研究

利用Fenton试剂法对造纸废水生化出水进行处理研究，讨论了处理造纸废水的影响因素：pH值，H2O2的用量，Fe^2＋的用量，反应时间等因素对CODCr去除率的影响，得到最佳的工艺条件为pH=4.00，H2O2（3％）的用量5．00mmol／L，FeSO4的用量为1．50mmol／L，反应时间40min后，CODCr去除率达到81.59％，出水COD降到100mg／L以下，达到国家造纸废水排放标准。     

絮凝沉淀去除马铃薯淀粉加工废水中蛋白的试验研究

采用絮凝沉淀法去除马铃薯淀粉废水中的蛋白质。经过方案比选．最终选择聚丙烯酰胺作为絮凝剂,结果表明：在聚丙烯酰胺投加量为70mg／L,pH值为5,温度为20℃,反应时间40min的最佳工艺条件下。采用聚丙烯酰胺絮凝沉淀法对马铃薯淀粉加工废水中的COD、蛋白质、BOD、SS都有一定的去除效果。COD的去除率保持在30％～40％,蛋白质的去除率保持在45％～55％,BOD的去除率保持在10％-15％．SS的去除率保持在50％-60％,大大减轻了后续处理构筑物的负担。     

芬顿氧化法处理废水研究

废水具有成分复杂、有机物含量高、色度高、难生物降解等特点。目前传统的废水处理工艺流程已经很难满足多种污染物去除率的要求,国内外对废水处理研究应用的经验证明,芬顿氧化法可氧化降解废水中的COD、色度、总磷等水质指标。尤其是芬顿氧化法在处理印染、染发、造纸、制药废水等难降解工业废水时有较好的处理效果。     

生化-絮凝氧化法处理档发废水

介绍用生化-絮凝氧化法处理档发废水的技术特点、工艺流程和实践应用.档发废水经处理后,出水水质达到<污水综合排放标准)(GB8978-1996)二级标准,CODCr、BOD5、色度和NH3-N去除效率均达到92%以上.运行结果表明,该工艺组合合理,处理效果稳定,耐冲击负荷强,操作方便,具有较好的实用性.     

固定化海底污泥处理活性染料印染废水的研究

本研究通过驯化采集的海底活性污泥,培养优势菌种并固定化,用于处理模拟印染废水和实际印染废水。模拟印染废水的静态处理结果表明,固定化海底活性污泥具有较好的适应性,降解染料的能力较强。在温度为25℃、pH为6~8的条件下,经动态处理,印染废水色度降为0,COD降为5.12 mg/L,氨氮降为0.08 mg/L。     

铁盐去除地下水中砷的应用研究

针对某工业企业地下水砷污染,本研究采用抽出+沉淀-絮凝法进行修复处理,考察不同混凝剂对地下水中砷的去除效果,并针对色度较大的地下水提出解决方案。结果表明,采用0.06 mol/L的氯化铁处理后,地下水中砷的去除率为90.15%～92.40%;针对色度较大的地下水,采用1.5%过硫酸氢钾进行预处理,色度去除率达99%,满足验收标准。     

絮凝法强化处理垃圾渗滤液的试验研究

絮凝法对垃圾渗滤液进行深度处理的研究中，分别对硫酸铝，聚丙烯酰胺进行了絮凝试验。结果表明：硫酸铝，聚丙烯酰胺各自单独作用时处理效果均不能达到要求，水样的pH对硫酸铝的絮凝效果有较大影响。而不聚丙烯酰胺的絮凝效果影响不大。当两者联合作用时，COD去除率可达到60%左右。     

Penetration and Post-infection Development of Meloidogyne Incognita on Tobacco as Treated by Rhizobacteria Pseudomonas Fluorescens Strain P-72-10

The bio-control potential of rhizospere bacteria Pseudomonas fluorescens against plant-parasite nematode had been demonstrated. P. fluorescens had shown the effect to enhance tobacco resistance to root-knot nematode Meloidogyne incognita. Inoculation with P. fluoreseens in tobacco could lead to significant reductions in the number of juveniles that penetrated tobacco root and further life stage development of the juveniles. The number of juveniles penetrated into tobac- co root in treatment with P. fluorescens is significantly different from CK at 2DAI, 6DAI, 8DAI and 10DAI. Significant reduction and delayed development of juveniles that penetrated into tobacco root and treated were observed in treatment at 14DAI, 21DAI, 28DAI and 35DAI. In addition, P. fluoreseens treatment leads to a significant reduction in the number of eggs per egg-mass at 35 DAI. The results show P. fluorescens induced a continuously suppression on root-knot nema- tode M. incognita throughout their entire early infection phase of root penetration, subsequent life stage development and reproduction.     

On the Major Transformation of the Asia-Pacific Regional Structure北大核心CSSCISSCI

Recent years have witnessedsignificant changes in the Asia-Pacific regionalstructure featuring the shift in power balance among related countries as well as adjust-ments in their respective regional strategies. So what is the prevailing trend in thistransformation and what kind of regional order will likely emerge in the future？ To an-swer these questions, the paper tries to explore the following dimensions： the evolvingregional context, shift in power balance and power conversion, geo-political and geo-e-conomic developments and interactions between them, and evolving regional order. Asthe study shows, the broadening of regional geographical scope, the rise in the numberof actors involved, as well as changesin the relations among them, have combined tocast a pluralistic and complex flavor to the regional structure. While the power balanceamong China, the United States and Japan shifts, and power conversion is also occur-ring. China and Japan are paying increasing attention to their security roles, whereasthe United States under the Obama administration laid more stress on expanding itsgeo-economic clout. In spite of the intensifying geopolitical competition among China,the United States and Japan in recent years, a Sino-US strategic compromise-whichholds the key to regional geopolitics-isother front, some kind of geo-economicmore likely to take place in the future. On thecooperation will probably emerge. In the longerterm, it will be the geo-economic trend thatwill prevail over the geopolitical trend inthe region. Finally, the future evolution of regional order wiI1 mainly follow the eco-nomic logic, accompanied by the dilutionof its hegemonic and hierarchical nature.Hence, a pluralistic and complex regional community will emerge.     

For Better or for Worse? Local Impacts of the Decentralization of Indonesia’s Forest Sector

This paper quantifies the local impacts of mechanized logging on forest-dependent communities in Indonesia, before and after decentralization. A conceptual framework incorporates financial, social, enforcement, rent-seeking, and environmental impacts. Using data from 60 communities in East Kalimantan, the empirical results suggest that significantly more households received financial and in-kind benefits after decentralization compared to before. Many communities engaged in self-enforcement activities against firms both before and after decentralization. Post-decentralization, a significantly higher proportion of households perceived community forest ownership. There were few significant differences in perceived environmental impacts. Little evidence exists of a post-decentralization trade-off between environmental and financial contractual provisions.     

以资本管理为核心的银行治理综合评价指标研究

商业银行的特殊性体现在风险性、外部性和多重治理目标上，尤其集中体现在风险管理的本质上。风险管理日益成为现代商业银行的主体活动和核心职能，资本管理成为现代商业银行风险管理的核心。在整合EVA和RAROC指标的基础上。文章构建了以资本管理为核心的银行治理的综合评价指标，以求真实反映银行经营的成果，有效衡量风险收益和风险成本的对比关系，从而反映以资本管理为核心的银行风险管理的过程、能力和效率。     

Organization and incentives in the age of sail

The British Navy in the age of sail was the most successful bureaucracy of its time. Its organization and incentive structures differed importantly from contemporaneous private sailing ventures, but closely resembled those of today’s large corporations. To induce efficient effort, the navy used a hierarchical tournament, in which sailors competed for higher pay that came with promotions based on relative performance. Promotion probabilities, the option value of future promotions, and the higher effort required of men in higher ranks and on larger vessels, combined to yield a highly skewed pay structure.     

The German Hanse and Bergen – new perspectives on an old subject

Abstract

The Hanseatic League and her kontors (trading posts) were an integral part of the medieval trade system in Northern Europe. Hanse merchants dominated many markets in this region and managed to maintain a monopoly-like role in towns like Novgorod and Bergen for many centuries. Consequently, one focus of historical research about the Hanseatic League lay on the mechanisms that enabled the Hanse merchants to keep that strong of a position for such a long time.

This article is part of the discussion about this topic. Based on Lübeck merchants with business interest in the Norwegian town of Bergen, the so-called Bergenfahrers (Bergen travellers), it will give new insights into the Hansards' economical and social organization. The three main points are (a) the integration of the Bergen market in the Hanseatic trade network as an intermediary trading place on the vivid East–West route of Hanse trade; (b) the importance of the Bergenfahrers within the Hanse merchants' economical, social and political networks; and (c) the structure of the Bergenfahrers network patterns in the late Middle Ages.

In addition to new insights into the important role of Bergen and the Bergenfahrers within Lübeck's and the other Wendish Hanse towns' trading system, this articles provides further proof for the usefulness of the methods of Social Network Analysis in medieval economic research.     

Markteintrittstiming von Telekommunikationsdiensteanbietern

Zusammenfassung Die vorliegende Studie analysiert für 87 Neuprodukteinführungen (NPE) und Auslandsmarkteintritte (AME) von Telekommunikations(TK)-Diensteanbietern in Deutschland, zu denen 42 Schlüsselinformanten in einer schriftlichen Befragung Auskunft gaben, (1) inwieweit deren zeitliche Eintrittspositionierung durch Marktcharakteristika und Unternehmensressourcen erkl?rbar ist sowie (2) inwieweit und gegebenenfalls unter welchen unternehmensexternen und -internen Situationsbedingungen deren Markteintrittstiming mit dem wahrgenommenen Eintrittserfolg assoziiert ist. Ein früher Markteintritt wurde dann realisiert, wenn die Wettbewerbsintensit?t im adressierten Gesch?ft niedrig und das Budget für den Expansionsschritt überdurchschnittlich ausfielen. Zwischen dem Markteintrittstiming und der Beurteilung des Eintrittserfolgs bestand ein nicht monotoner, umgekehrt U-f?rmiger Zusammenhang: Frühe Folger wiesen signifikant bessere Erfolgswerte auf als Pioniere und sp?te Folger, deren Erfolgsniveaus nicht signifikant divergierten. In einer Industrie, die durch starke externe Netzeffekte gepr?gt ist, fallen offenbar die Nachteile eines Markteintritts als Pionier oder sp?ter Folger st?rker ins Gewicht als die Vorteile dieser beiden zeitlichen Eintrittspositionierungen. Unabh?ngig vom Markteintrittstiming wurden NPE/AME von TK-Unternehmen als erfolgreicher eingestuft, wenn sie sich in einen Markt mit stark wachsender Nachfrage und aufeinander abgestimmt (re)agierenden Wettbewerbern mit qualitativ überdurchschnittlichen, abw?rtskompatiblen, erprobbaren und wenig erkl?rungsbedürftigen TK-Diensten engagierten.      

Financial Reporting and Trade Credit: Evidence from Mandatory IFRS Adoption*

We investigate the effect of mandatory IFRS adoption on trade credit. We document that firms in countries that adopt IFRS receive more trade credit from their suppliers, consistent with improved financial reporting quality and comparability playing a role in facilitating informal financing. This increase is larger for countries with a low level of societal trust, a poor pre‐IFRS‐adoption information environment, and stronger legal enforcement. These cross‐sectional results suggest that the conditions under which higher‐quality information is made publicly available affect suppliers' decisions to provide trade credit. This increase is also larger for firms with greater exposure to foreign markets, a finding that highlights the importance of more comparable international financial reporting standards in facilitating cross‐country trade credit. We also find that IFRS adoption has a stronger positive effect on trade credit for firms with greater liquidity needs. Finally, we find that firms in countries that adopt IFRS also extend more trade credit to their customers. Overall, our results support the notion that financial reporting can have a causal effect on trade credit.