江苏丰县:木材业打造"顶端优势"

丰富的林木资源，使丰县成为在全国颇具影响的木材集散地，目前，该县投资近千万元，在县城西部建成国内最大的进口红榉木批发市场和木线条加工专业区，来自北京，广州，青岛，浙江等地的木材经销商，分别通过青岛，广州，天津，连云港等口岸，源源不断地把法国，德国，乌克兰，俄罗斯等国生产的红榉木进口到丰县市场，再销往各地，日均销量达1000多立方米，占全国榉木销售量的60%，如今这里已成为我国最大的进口榉木交易市场。     

谁家的黄酒喝着放心？

黄酒是以稻米，黍米，玉米，小米，小麦等粮食为主要原料，经蒸煮，糖化，发酵，压榨，过滤，贮存，勾兑等工艺生产的酿造酒。黄酒酒精度低，耗粮较少，富含多种氨基酸，蛋白质，维生素和对人体有益的矿物元素，营养丰富。     

莫使江水变泪水——沱江污染引起的思考

人们还依稀记得，沱江曾是四川人引以为荣的美丽之江，她淌过634公里路程，滋润三百万平方公里土地，欢快地流入长江。放眼望去，两岸青青，江水碧透，商船往来，渔舟结伴，而或夜幕降临，萤火明灭，星月当空，清风徐起，岸柳依依，情语细细。夏日里，淘气的小男孩三五成群，光着身子在江边嬉水。     

着眼农村工业化 立足农民奔小康 加快小城镇建设步伐

小城镇建设是推动农村社会经济发展，实现农村工业化，城乡一体化的必由之路，是农民致富奔小康的重大举措．近年来，我们认真贯彻执行“全面规划，正确引导，依靠群众，自力更生，因地制宜，逐步建设”的方针，着眼农村工业化．立足农民奔小康．突出重点，统一规划，合理布局，统一组织．     

Touch Play：胶片上的旖旎风情

多数人最初对于异域的直观认知，是按下Play键，通过一帧帧画面，一枚枚音符完成的，文字虽有盈余的想象空间，但真正的风土，艺术，人情，不经双眼过目，双耳聆听，怕是参不透其中的虚虚实实，胶片捕捉的声音和映像就像一面镜子，镜中的那个民族虽不可触及，却是真真实实地立在眼前，荡在耳边。     

多肉植物宝典 野趣盎然的加花土参

加花土参（Talinum caffrum），也称草火花、黄花马齿苋，为马齿苋科、土人参属块根类多肉植物。植株具粗大的根状茎，其表皮灰色，稍有纵裂。粗壮的藤茎生于根状茎顶端，稍直立，绿色。叶互生，长倒卯形，质厚，全缘，深绿色，中脉明显。花生于叶腋，多单生，花萼黄白色，花瓣5枚，先端尖，亮黄色，直径1．5～2厘米。通常在光照充足的午后开放，傍晚闭合，单朵花只能开放4小时左右，但每天都有新的花朵开放，花期5～10月。蒴果，内具细小的黑色种子。     

杜鹃无故死亡原因何在？

杜鹃根系纤细，分布较浅，吸引功能较弱，既怕干，又怕涝，需肥但又怕浓肥，所以在土质，光照，浇水，施肥，温度等方面，均需细心管理，否则轻则落蕾，落叶，重则死亡。现就杜鹃无故死亡的原因及防治方法综述如下：     

自然·日式·禅

自然禅意的居室表情，犹如初春的香茗荡漾。麻绳，沙浪，欧松板，石材，水泥艺术，空中的棋盘等，打破传统而又解放自然，居于其间，也比为自然的元素，于是在茂密的水泥丛林里的都市中和你一起呼吸自然的绿，用想象力来喝彩创造力，用恬淡的柔优悟道参修。     

家庭，学校，社会“鼎力”学生成长

学生如花朵，社会同阳光，学校雨露，教师修剪，家长培土。花儿为什么这样红，为什么这样灿，阳光的照耀，自然雨露，“园丁”修剪，肥沃大地奉献??????一应俱全，才能实现。有生机有活力，争奇斗艳，溢吐芳香，香满人间，迎献给社会，步入人的眼帘，使人赏心悦目，香乐心田??????这些可不是人们苛意制作的塑料花无所比拟的。花儿红灿艳香，需要生命需要自然，不合时宜浇（教）灌（贯）千万别再现。     

拿什么留住你，城市的历史记忆？--探究郑州老胡同现状及保护

曲折幽深的街巷，四四方方的庭院，爬满围墙的青藤，清脆悠扬的鸽哨，安静懒散的午后，这曾是胡同的味道。它，有街，有景，有故事，也许现在有很多人不一定清楚它们的名字和数量，不记得它们的面貌，但我们是否还记得，在渐渐习惯钢筋水泥的铿锵呵护下，有一片不经意的生存空间--老胡同，它们被称作城市的脉络，这些几乎土的掉渣的名字或许不能给居住在其中的人们留下几许印象，但是它们确实存在过，且承载了太多人的生活。     

办公建筑热回收装置节能运行模式分析

当前新风负荷占建筑能耗的比重很大,而热回收可以有效减少新风负荷。为进一步细分空调系统中热回收装置的全年运行情况,提高热回收装置的节能运行效果,针对北京地区办公建筑,以研制的热管式热交换器为例,利用De ST软件构建了办公建筑模型。空调系统采用两管制风机盘管加新风系统。引入平衡温度的概念,划分了热回收装置的全年启停时间及对应运行模式,根据标准气象年的气象数据绘制能量回收效果图,得到相应模式下的热回收量,可节省62.6%~66%的新风负荷,节能效果明显。     

Denitrification on poly-beta-hydroxybutyrate in microbial granular sludge sequencing batch reactor

Microbial granules were successfully cultivated in an alternating aerobic-anaerobic sequencing batch reactor (SBR) for removing organic carbon and nitrogen. It was found that almost all input ammonium was converted to nitrite and nitrate in the aerobic phase, while the efficiency of denitrification was highly related to the availability of external carbon source in the anaerobic phase. Complete denitrification was achieved with sufficient supply of external carbon, while only partial denitrification was observed with no addition of external carbon. Results showed that in the absence of external carbon source, pre-accumulated poly-beta-hydroxybutyric acid (PHB) in microbial granules could be utilized for cell maintenance and denitrification. With supply of external carbon but no addition of nitrate, PHB accumulation accounted for the main mechanism of the organic removal. Under balanced growth conditions (with organic carbon and nitrogen supply), external organic carbon was consumed simultaneously for denitrification, PHB storage as well as for cell functions. It was revealed that the potential role of PHB for denitrification by microbial granules was very limited, i.e. less than 28 mg nitrate-nitrogen l(-1) was found to be denitrified with internally accumulated PHB. This study for the first time shows the limiting capacity of PHB as reducing power for denitrification by microbial granules.     

机制砂的制备工艺及在某桥梁工程中的应用

概述了机制砂的典型制备工艺,分析了影响机制砂质量的几个因素,介绍了机制砂在工程中的利用现状。以西部某桥梁工程为例,介绍了桩基部位机制砂混凝土的配制方法,并对混凝土试件的抗压强度、抗水压渗透性、抗氯离子渗透性,以及抗硫酸盐耐蚀系数进行了测试,并分析了石粉含量对混凝土试件性能的影响,为机制砂在类似工程的应用提供参考。     

Determination of chromium in human milk, serum and urine by electrothermal atomic absorption spectrometry without preliminary ashing

In the present study a Perkin-Elmer 5000 atomic absorption spectrometer equipped with a tungsten--iodide lamp for improved background correction at the 357.9 nm chromium absorption line and an HGA 500 graphite furnace were employed for the direct determination of chromium in human serum, milk and urine. The method of standard additions was used: 0.25-0.75 ng Cr was added to 1 ml samples. Except for urine samples, a dilution of 1 + 1 to 1 + 2 with H2O was necessary in order to obtain correct calibration curves. The average concentration of chromium in all the samples of normal subjects was less than 0.5 ng Cr ml-1. The day-to-day variation for all of the pooled samples was around 10% (relative standard deviation). For urine, the accuracy of the method was tested by comparing the results of another laboratory for the same two round robin samples. Excellent agreement was found between the present method and those of the other laboratory that had used isotope dilution--mass spectrometry and continuum source wavelength modulated echelle--atomic absorption spectrometry to define the chromium concentration in the samples. The detection limit of the method, 0.05 ng Cr ml-1 for urine and serum and 0.1 ng Cr ml-1 for human milk, was sufficient for the biological fluids analyzed. The method was employed for the determination of chromium in 24-h urine samples of maturity onset diabetics supplemented with 20 or 200 micrograms Cr3+ d-1 for six weeks. It was shown that the 24-h urinary chromium excretion accurately indicates the daily dietary chromium intake of these patients.     

东昆仑成矿带某隐伏矿激电响应特征及成矿预测

在青藏高原高寒区对东昆仑矿集区某斑岩型铜铁矿利用激电数据进行了快速评价及成矿预测。利用先平面后剖面的地质工作方法:首先通过中间梯度法装置进行了平面测量,数据利用距离加权反比插值法进行了插值绘图;接着利用对称四极装置测深法进行了典型剖面的测量,数据采用有限单元法进行了正演模型构造与拟合计算,数据拟合误差幅频率达到0.58%,电阻率达到6.6%,清楚地划分了含矿异常带和围岩的分布,最后钻探验证效果明显。文章提及的数据采集、处理解释方法和思路,为在交通不便、高寒矿集区的地质找矿快速评价工作提供了参考。     

一种锚杆计算模型及其在岩坡锚杆支护中的应用

针对目前岩土工程中锚杆数值模型存在的局限性,探索了适合于强度折减有限元法计算和锚固优化新的锚杆计算模型,考虑了锚杆沿壁摩阻力作用,研制了相应程序,并应用于岩石边坡锚杆支护方案计算中。应用表明,该模型方便可行,提高了加锚岩体数值模拟的适用性。     

DOC removal by multi-stage ozonation-biological treatment

Multi-stage ozonation-biological treatment process for dissolved organic carbon (DOC) removal was evaluated to apply for drinking water treatment. Waters with different types of DOC were used, i.e. a reservoir water for drinking water supply, a secondary effluent from a municipal wastewater treatment plant and a solution of humic substances extracted from leaf mold. The multi-stage ozonation-biological treatment process was compared with conventional single-stage ozonation-biological treatment process. Amount of DOC removed in biological treatment was defined as amount of biodegradable dissolved organic carbon (BDOC) in influent of biological treatment. DOC removal in the multi-stage ozonation-biological treatment was higher than that in the conventional single-stage ozonation-biological treatment with the same total ozonation time for the reservoir water and humic substances solution. Moreover, three- or four-stage ozonation for 5 min followed by biological treatment (total ozonation time 15 or 20 min) showed higher removal of DOC than the single-stage ozonation (60 min) and biological treatment. The higher DOC removal in the multi-stage treatment was due to the production of BDOC by ozonation. The long-term ozonation was not effective to produce BDOC because most of ozone was utilized to oxidize BDOC produced in the early stage of ozonation. In the multi-stage treatment, ozonation was effective to decompose refractory DOC and to produce BDOC because BDOC was removed by biological treatment. However, multi-stage ozonation-biological treatment was not effective for the secondary effluent. The reason seems to be high concentration of ozone scavengers in that water and low reactivity of DOC for ozone.     

土体极限分析定理的证明与广义流动法则

对目前所证明的上、下限定理所需的条件进行了分析,认为目前的证明尚存在值得进一步推敲的疑点。文中证明,特征线法的应力关系式与本文的屈服条件、屈服函数的极值条件是相同的。在此基础上,对定理给出了严密的证明。并建议了一种新的流动法则,对应用定理求极限荷载的近似解给出了新的解题思路。     

基于隧道设计规范静土压力计算假设基础上的地震土压力拟静力计算法

结合现行公路和铁路隧道设计规范隧道围岩静土压力计算方法,假定地震作用下隧道围岩土体中形成的破裂面,由静力平衡推导出隧道地震土压力计算公式,并把常用的地震动土侧压力系数汇成可查的表格。该法属于滑楔—烈度法范畴,与目前常用的针对挡土墙结构提出的其他拟静力计算方法进行比较,它计算的地震动土侧压力系数与静土侧压力系数的增量计算值与其他方法的平均值接近,同时形式上与静土压力计算式接近,当水平地震系数为0时,公式与静土压力公式吻合,适合工程师应用。     

宁波梅山岛商务中心单元式玻璃幕墙防水技术

宁波梅山岛商务中心单元式玻璃幕墙通过工字插芯实现单元板块组件的连接,并选择合适的EPDM胶条进行多道密封设计,幕墙板块通过可靠的组角技术提高板块强度,同时对开启扇与百叶进行严密的防水设计,最终达到完美的防水效果.