太阳能飞机

正这架单人飞机的主要技术参数:长度:21.85米高度:6.4米载荷:450公斤锂离子电池引擎:4台电动机,每台7.5kW巡航速度:70km/h翼展:63 4米机翼面积:200m~2最大起飞重量:2000kg起飞速度:35km/h升限:8500m由瑞士建造的Solar Impulse太阳能飞机5月24号从瑞士起飞,目标是完成有史以来太阳能飞机的首次洲际飞行。在这次距离2500公里的飞行中,飞机将在马德里做一次技术性停留然后再飞往最终的目的地摩洛哥的拉巴特。这此飞行也被看做是计划在2014年进行的环球飞行的演练。而在大约一年前同一架飞机完成了从瑞士到比利时布鲁塞尔的国际飞行。在这次飞行中这架纯粹靠阳光提供能源的飞     

浅谈ADF改装施工中的接地技术

文章研究的接地技术在飞机加改装电子设备时非常重要,但常常被施工人员忽视。据不完全统计,每年约有20%~30%的飞机电子故障与电气设计或施工中的接地不良有关,这不仅会引起设备工作异常,甚至还会损坏设备~([1])。另外飞机飞行中遇到高强度电磁辐射或闪电时,有效的屏蔽线接地能防止其造成的电磁干扰。     

前沿

太阳能飞机横越美国据美国媒体报道,全球第一架太阳能驱动飞机"阳光动力号"(Solar Impulse)完成横越美国的历史性飞行。这架实验性太阳能飞机于7月6日晚间在纽约肯尼迪国际机场降落,比预定计划提前了3个小时。这架瑞士制造的太阳能飞机,提供动力的是大约12000个光伏电池,这些电池覆盖着63米长的巨大机翼,并在白天向机载电池充电,让飞机可以在夜间飞行。单座飞机的飞行时速可以达到大约60公里,不过不能穿越云层,也不能在雨中飞行。     

ARJ载客首飞

在飞机投入航线运营前,为保证运营的安全性和经济性,还需做大量的准备工作,未来路还很长4月2日,包括东方航空、浦银租赁、中飞租赁以及盐商集团等在内的首批客户代表,搭乘ARJ21-700飞机105架机在上海体验航线演示飞行。这是ARJ21-700飞机首次搭载客户开展体验飞行。此前,3月16日,ARJ21-700飞机在上海和天津、天津和南通之间执行了一次具有特殊意义的飞行,正式拉开了为期半年的航线演示飞行的序幕。2014年12月30日,中国商飞公司迎来了型号研制历程中一个重要的里程碑,ARJ21-700取得了中国民航局颁发     

Garmin航电系统飞参数据的特性分析

机载飞参数据是航电系统记录的飞机运行过程中的飞行参数,用于监控飞机飞行状态以及分析飞机操纵品质.为了帮助机务、飞行训练人员更好地认识Garmin1000系统,更好地理解飞参数据的特点并应用数据开展研究,以Garmin1000系统为研究对象,对机载飞参数据的构成和分类、数据的来源以及品质特性进行分析,总结飞参数据之间的联系与差异.从数据角度进行分析,对于飞行训练的客观评价、飞机状态监控以及维修有重要的意义.     

飞行汽车

正开车的人都有被堵在路上而着急的经历,着急的时候恨不得能在车上装副翅膀飞过重重障碍。这种在科幻电影中的可以飞行的汽车已经来到我们身边。10月底,斯洛伐克的设计师Stefan Klein和他的公司推出了名为Aeromobil 2.5的飞行汽车。Aeromobil 2.5具有现有汽车和飞机的基础设施,配备了可折叠机翼和位于尾部的螺旋桨,其车身使用钢制车架及碳纤维外壳。车身全长6米,重449千克,其飞行状态下最高速度可达200km/h,地面行驶最高速度达160km/h,空中飞行距离为692km,地面行驶距离为498km。设计师Stefan Klein早在1990年便开始研究飞行汽车,Aeromobil 2.5为其所研制出的第三代飞行汽车。今年早些时候Aeromobil 2.5已经在真实飞行条     

让纸飞机可以遥控——PowerUp 3.0

正智能设备的确让许多原来复杂的装置变得简单。这个被称为PowerUp 3.0的套件让玩家可以轻而易举地制作出一个遥控飞机,这也许是目前最简单可行的遥控飞机了。这个套件的核心部分是微型化的遥控和驱动模块。位于机头的是无线控制收发电路和电池,位于机尾的是由微型电机驱动的推进器和方向舵。充电完成后PowerUp可以让纸飞机在空中飞行10分钟,遥控距离可以达到55米。     

航空机械设备检修存在的问题与分析

随着现代社会的快速发展,交通运输也越来越向着高效化、快捷化的趋势所发展,由此也就使得飞机这一交通工具越来越被人们所关注。然而飞机在空中飞行的过程中必然会脱离地面,由此也就导致其在安全性方面受到了极大的挑战。要想保障飞机的飞行安全,科学、合理的检修工作必不可少。本文将重点就飞机检修过程中所存在的主要问题来展开具体分析,并据此提出了一些针对性的应对策略。     

前沿

教-8飞机火箭实弹 近日,北京的空军第四飞行学院机场,几架挂装航空火箭弹的教-8飞机先后呼啸而起,奔袭数十公里外的靶场。10多分钟后,首机飞抵,只见两只＂火龙＂拖着长长的＂火舌＂直扑目标——教-8飞机火箭实弹验证试飞首发命中。此次火箭实弹射击训练,在教-8飞机上和在中国飞行院校中皆属首次。     

我国需要健全CFO制度

如果将企业比做一架飞行的飞机，CEO（首席执行官）就像是驾驶员，掌握飞行的方向和目的地，完成飞行的操控。CFO就好比副驾驶（领航员），负责提供飞行中的各种数据，以支持正常的飞行，同时也具有监督作用，确保飞机安全正确地抵达目的地，必要时还可以帮助驾驶员驾驶飞机。[编者按]     

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.     

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。     

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.      

利用膜技术回收利用碱性废水研究进展

回顾了利用膜分离技术处理碱性废水的工艺与综合利用技术所取得的丰硕成果，总结了各种治理方法的特点、适用性及发展方向。     

Taxing Times in Indonesia: The Challenge of Restoring Competitiveness and the Search for Fiscal Space

Indonesia’s economic growth picked up slightly in mid-2016 but remains below the level demanded by government and popular aspirations. Despite a plethora of reforms intended to increase efficiency and productivity, some policies are perverse and longstanding problems of implementation remain. The share of manufacturing has declined, the real exchange rate has appreciated, exports have dwindled, and growth has been trending downwards. The banking sector is stable but inefficient, with wide net interest margins and numerous barriers to competition. Trade protection, particularly in basic food commodities, has created high costs that weigh particularly heavily on the poor. Declining government revenues have placed increasing pressure on the public budget, even as the current administration aims to increase spending on infrastructure and welfare and to enhance productivity. In an effort to increase revenues, the government has announced a tax amnesty program and other measures. In addition, Sri Mulyani Indrawati, the new finance minister, has taken steps to cut non-essential expenditure in order to secure high spending on infrastructure and at the same time keep within the 3% budget deficit limit stipulated by law. Although the overall debt situation is not yet alarming, declining revenues and budget cuts that do not fully reflect this decline are putting pressure on increasing debt levels. The government’s high-profile tax amnesty program was the major policy initiative implemented in the second half of 2016 that aimed to relieve this pressure. Despite widespread criticism of, and scepticism about, the tax amnesty (both within and outside Indonesia), its first phase had a much higher participation rate than most independent accounts expected. Revenues raised so far through the amnesty are less than 60% of the official target, but this is actually a strong result for the short term. The bigger question, however, is whether the amnesty is a key element of a more encompassing strategy to overhaul the system of taxation and tax administration.     

The causes of Japan's ‘lost decade’: The role of household consumption

In this paper, I analyze the causes of the prolonged slowdown of the Japanese economy in the 1990s and find that the stagnation of investment, especially private fixed investment, was the primary culprit. I then investigate the causes of the stagnation of household consumption during the 1990s and find that the stagnation of household disposable income, the decline in household wealth, and increased uncertainty about the future are among the contributing factors. Finally, I consider whether demand side factors or supply side factors were more important as causes of the prolonged slowdown of the Japanese economy in the 1990s and conclude that the former (especially misguided government policies) were probably more important.