Instantaneous electric heater real-time temperature control system

即热式热水器温度控制技术有两种：机械式、电子式。机械式：在水路中设置2-3个不同功率的加热管对水进行加热，通过不同的组合来实现不同功率的切换；一般有3-5个组合功率可以选择。可以通过调节水流量来对水温进行微调。由于流量调节及温度调节互相影响，因此该技术人性化不足。电子式：在水路中设置大功率加热体、流量传感器、温度传感器，通过控制芯片及其相关软件来实现对水温的控制。由于电子式即热式热水器水温不随流量变化，因此可以实现流量及温度分别控制，克服了机械式的不足点，受到消费者的青睐。 本文研制一种电子控制即热式热水器，采用实际产品案例作为研究对象。首先对现有即热式热水器系统结构进行研究；然后对其电路硬...There are two kinds of temperature control technology, mechanical and electronic. Mechanical： To establish 2-3 heating tubes of different power in the waterway to carry on the heating is the mechanical type, which can realizes the different power switch through the different combinations. Generally speaking, it has 3-5 combination powers to be possible to choose. And the water flow can be adjus...学位：工程硕士院系专业：物理与机电工程学院机电工程系_仪器仪表工程学号：X200818201

体育院校专业设置与市场需求的矛盾辨析

由“精英教育”走向“大众教育”产生的扩招潮流使我国的教育超越短缺状态,实现了短期内招生规模的跨越式发展,以质量为品牌的办学竞争逐步拉开。如何在愈发竞争的环境中立于不败之地,关系到体育院校的生存与发展。建议:体育院校利用“综合体育”特色,转变同质竞争观念,革新传统教学模式,改革考试方法,培养综合性的体育人才,从整体上解决其专业设置与市场需求的矛盾

Study on Practical and Active Use of BIOMASS In Recycling Oriented Society An Introduction to Practical and Active Use of Commercial and Kitchen Food Was

application/pdf論文(Article)BIOMASS has been long utilized since human being began to live an agricultural and stock farming life on the earth. However, in the 20"'century, it would seem that the people forgot to utilize BIOMASS practically and actively in most industrially developed countries. Facing with serious envi ronmental problems, the active and practical use of BIOMSS has recently been revitalized. Here, we discuss the followings, i.e., (1) the Structure of Sustainable Development Society and the new Eco nomic Theory that supports the sustainable development, (2) the Survey of revised "BIOMASS JAPAN, General Strategy" that has been published by the government of JAPAN, this March, 2006, (3) the Analysis of the Status Quo and the Questions to be solved Concerning the Practical and Active Use of BIOMASS in Japan, (4) the Study and Suggestions of Active and Practical Use of Kitchen Garbage, and so on.departmental bulletin pape

Study on Regionally Recycling-Oriented Social System -Case of Study: TAKANEZAWA-Machi, TOCHIGI Pref.-

application/pdf論文(Article)Takanezawa-machi is located 12 km northeast from Utsunomiya-city, the seat of Tochigi prefectural government. Takanezawa-machi has flourishing agriculture and a few R&D companies are located in its area. In order to build a Regionally Sustainable Development Society, the concept of Recycling-Oriented Society should be carefully examined to see if such a society is truly able to realize its sustainable development. Taking the case of Takanezawa-machi, as a case of study, this paper discusses the Regionally Recycling-Oriented Social System from the viewpoint of regional characteristics. Takanezawa-machi attacks and forms a recycling-oriented agriculture by making effective use of Biomass, e.g., food waste, cow dung, and other waste pollutions produced in its area. Challenge of Takanezawa-machi looks promising; it should offer examples to other local governments that have similar socio-economical characteristics.02876620departmental bulletin pape

Study on the Status Quo and the Problems of the Food Waste and M unicipal Waste in China

application/pdf論文(Article)Firstly,we surveyed the household and industrial waste of the whole country in China. We emphasized investigation of food waste and municipal waste of conditions for not only the whole country,but also Beijing and Shanghai specifically. Based on these fact finding surveys, we have made clear the problems concerning the recycling of food waste and municipal waste in China, from the viewpoint of the construction of“the Sustainable Recycling-Oriented Society”. In addition to the sways, we have proposed several ideas to be studied and considered immediately.departmental bulletin pape

微生物还原制备高分散度负载型钯催化剂

用地衣形芽孢杆菌 ( Bacillus licheniformis) R0 8菌体还原、制备高分散度负载型钯催化剂。透射电镜观察表明 ,R0 8菌体能够吸附还原 Pd2 +成 Pd0 颗粒。IR谱分析发现 ,细胞壁上的 - COO- 和 - HPO42 - 基团可能与菌体吸附 Pd2 +的过程有关。XPS测定结果表明 ,在载体 γ- Al2 O3上的 Pd2 +离子被 R0 8菌体还原成 Pd0。所形成的 Pd0 γ- Al2 O3催化剂经加热处理后 ,载体 γ- Al2 O3上的 Pd0 颗粒高度分散 ,其平均粒径为 5nm。该催化剂能够高效地催化一氧化碳的氧化反应

我国淡水水体中束丝藻(Aphanizomenon)的形态及分子特征研究

束丝藻(Aphanizomenon Morren ex Born.et Flah.)是一种浮游的丝状藻类, 隶属于蓝藻门念珠藻目念珠藻科束丝藻属,其最明显的特征是丝状体末端细胞渐细或成发状,延伸成无色的细胞。在滇池,束丝藻与微囊藻随着季节相互演替, 成为蓝藻水华的两大优势种群。然而,国内对束丝藻的种类一直缺乏了解;此外, 水华束丝藻是否能够产生麻痹性贝毒毒素,也是学术界一直争论的问题。基此, 本研究主要针对我国淡水水体柬丝藻属进行了研究。研究以从云南(滇池、洱海)、广东(广州)、河南(新乡)及武汉(月湖、梁子湖、南湖)等地采集、分离、培养的束丝藻为材料,对其形态和分子特性进行分析。形态学和分子特征比较的结果表明:我国束丝藻可以分为水华束丝藻(A.flos-aquae),纤细束丝藻(A. gracile)和依沙束丝藻(A.issatschenkoi)三类;同时16SrRNA 和 Rubisco 两个基因研究还表明水华束丝藻和纤细束丝藻具有较高的亲缘关系,其相似性分别为 99%和99%,而依沙束丝藻亲缘关系较远,相似性分别只有96%和93-94%。在 Rubisco 酶基因上还发现依沙束丝藻在 rbcLX 区域较水华束丝藻和柔细束丝藻多出一段约176 bp 大小的片断。此外,先前被报道的滇池水华束丝藻产毒株(DC 株),从形态和分子特征被认为是纤细束丝藻,结合以往国际的研究报道,进一步说明了水华束丝藻可能不是麻痹性贝毒毒素潜在产生者,而纤细束丝藻和依沙束丝藻是则是麻痹性贝毒毒素产生者

我国淡水水体浮游性鱼腥藻(Anabaena)与束丝藻(Aphanizomenon)的分子系统学研究

鱼腥藻(Anabaena Bory.ex Born.et Flah.)与束丝藻(Aphanizomenon Morren ex Born.et Flah.)是我国水体中常见的水华蓝藻种类,由于它们的藻丝、营养细胞、藻丝末端细胞(Terminal cells)、异型胞(Heterocysts)、厚壁休眠孢子(Akinetes)的形态和大小等特征易变,对鉴定工作造成许多困难,所以两属的分类一直是藻类学者面临的长期难题。基于当今鱼腥藻属与束丝藻属的分类研究,本文对我国淡水水体鱼腥藻与束丝藻属进行了形态和分子学研究,分离鉴定了11种浮游性鱼腥藻,3种束丝藻,其中8个鱼腥藻新记录种,2个束丝藻新记录种。16S rRNA,PC-IGS和rbcLX三个基因序列分析表明,鱼腥藻属具有较高的分子多样性,其分子系统较为复杂:一部分鱼腥藻与束丝藻亲缘关系较近,形成了一个混合群;部分鱼腥藻藻株单独形成一个群;而部分伯氏鱼腥藻(Anabaena bergii)形成一个类群且与前两个群相似性低于95%。这些结果表明了鱼腥藻属与束丝藻属不是单系种类(monophyletic),鱼腥藻属种类的分子水平具有明显的异质化(heterogeneous)。而束丝藻形成三个类群:水华束丝藻(Aphanizomenon flos-aquae)、依沙束丝藻(Aph.issatschenkoi)及柔细束丝藻(Aph.gracile),但三个类群与部分鱼腥藻混合形成亲缘关系较近的类群。因此,一个更为合理的、全面、准确的鱼腥藻与束丝藻分类系统急待重新确定

我国水华蓝藻的新类群——阿氏浮丝藻（Planktothrix agardhii）生理特性

阿氏浮丝藻（Planktothrixag ardhii）是水华蓝藻的重要类群，实验对我国不同省份分离到的5株阿氏浮丝藻生长速率、色素组成、光合活性参数进行了测定．结果表明分离于广州的HAB1128叶绿素a（Chl-a）含量较低，藻蓝蛋白（C-PC）比例和含量较高，电子传递速率（ETR）测定结果表明，HAB1128的ETR曲线较高，最大ETRmax值也显著高于其余4株，高效的光能电子传递链弥补了光合色素Chl-a的不足，以致HAB1128保持了中性的生长速率，分离于武汉东湖的HAB631则与之正好相反，较高的Chl-a受限于光能电子传递链的薄弱，生长速率表现较低．分离于北京、上海、昆明的3株藻株在各项生理指标上无显著差异

我国水华蓝藻的新类群阿氏浮丝藻planktothrixagardhii生理特性

阿氏浮丝藻（Planktothrixag ardhii）是水华蓝藻的重要类群，实验对我国不同省份分离到的5株阿氏浮丝藻生长速率、色素组成、光合活性参数进行了测定．结果表明分离于广州的HAB1128叶绿素a（Chl-a）含量较低，藻蓝蛋白（C-PC）比例和含量较高，电子传递速率（ETR）测定结果表明，HAB1128的ETR曲线较高，最大ETRmax值也显著高于其余4株，高效的光能电子传递链弥补了光合色素Chl-a的不足，以致HAB1128保持了中性的生长速率，分离于武汉东湖的HAB631则与之正好相反，较高的Chl-a受限于光能电子传递链的薄弱，生长速率表现较低．分离于北京、上海、昆明的3株藻株在各项生理指标上无显著差异．</p