铊矿物及铊的植物找矿

迄今为止,世界发现铊的独立矿物49种,我国已发现铊矿物9种,其中铊明矾为贵州省发现的第一个铊的新矿物。铊矿物中铊与砷密切共生,而硫是联系二的重要桥梁。铊的植物找矿包括植物指示和植物矿石。一些植物中铊含量非常高,可以作为寻找铊矿的有效指示植物。植物找矿作为一种新兴找矿技术,还有许多研究工作有需要去做。     

Performance of wuxi WWTP in china

In Wuxi Wastewater Treatment Plant, the Anaerobic, anoxic and oxic (A2/O) process was employed to remove the nitrogen and phosphorus, which exhibited the positive results of the high removal efficiency for phosphorus with a range of 67.7% to 89.9% and an average value of 78.0. The effluent of phosphorus met the national discharge standard. The removal of TN was effected by both BOD variation of influent and wastewater temperature. TN removal was in the range of 28.5% to 55.8% with an average value of 39.4%. The energy cost was 0.15 kWh(m3d)-1 or 1.35 kWh(kgBOD·d)-1. The annual average sludge production was 46.3 m3d-1, the annual average dosage for the dewatering was 40 kgd-1.     

LG植物胶泥浆在煤田复杂地层钻探中的应用研究

在河南省驻马店汝南县林楼一正阳县张楼一带的煤田勘探中，第三、第四系地层厚达700m，经常遇到水敏性粘土、砂质粘土、砂质泥岩、粉砂岩和卵砾石等地层，易造成缩径、超径、坍塌和掉块等孔内复杂情况。结合该地区的地层特征，采用新型LG植物胶泥浆来解决钻探的“瓶颈”难题。应用实践表明，LG泥浆起到了显著的抑制缩径、超径和防塌作用，大大减少了孔内事故的发生，提高了钻进效率。     

云南省玉溪市引种番茄椒的气象条件分析及对策研究

通过对云南省玉溪市2001～2004年引种番茄椒田间试验观测数据及当地同期气象资料的对比分析，结果表明云南省玉溪市可有选择性露地引种番茄椒，但需要安排好适宜的播种期和移植期才利于提高单位面积产量。这一结果对指导玉溪市引种、推广番茄椒品种有积极地参考作用。     

大沙鼠掘洞对准噶尔荒漠植物群落的小尺度影响

通过比较大沙鼠洞区和对照区植物种类组成、盖度和密度的差异,研究了大沙鼠掘洞对准噶尔荒漠植物群落物种组成和植被结构的小尺度影响。使用Mann-Whitney U检验表明,洞区植物种数(n=6.47)显著高于对照区(n=4.32)(z=5.55,p<0.01);洞区半灌木种数(n=0.89)显著低于对照区(n=1.21)(z=2.70,p<0.01)。由于大沙鼠的采食,建群种盐生假木贼(Anabasis salsa)在洞群区的出现频率,密度以及高度均显著低于对照区;洞区草本植物种数(n=5.55)显著高于对照区(n=3.11)(z=6.65,p<0.01)。3种多年生草本植物在洞区的密度均显著高于其在对照区的密度。在大沙鼠洞区,由于废弃的鼠洞入口塌陷而形成的坑洼中沉积的疏松粗质沙土促进了沙生针茅(Stipa glareosa)和细叶鸢尾(Iris tenuifolia)的生长发育。8种一年生植物中,盐生草(Halogeton glomeratus)、对叶盐蓬(Girgensohnia oppositiflora)、小车前(Plantagominuta)、鹤虱(Lappula semiglabra)和黄芪(Astragalussp.)的出现频率和密度在洞区均显著增加。尽管受到大沙鼠的采食,盐生草在洞区的出现频率和密度不仅没有减小,反而显著增加。这可能是由于大沙鼠对土壤的扰动,在洞区形成的裸地促进了盐生草等一年生植物的生长发育。     

核电厂地震安全性评价中的断裂构造调查与评价

本文针对当前工作中存在的问题，对核电厂地震安全性评价工作中断裂构造调查与评价的技术思路、发震构造鉴定、能动断层鉴定与调查、地表断裂影响评价、发震构造与能动断层的关系等方面的问题，从核安全法规的层面进行了分析和讨论。认为对核安全法规的正确认识和理解，是较好地解决当前问题的重要途径。     

Response of sediment characteristics to trophic state change at submerged macrophyte zones in a large shallow Lake Wuliangsuhai, China

Sediment samples at different depths were collected from a large shallow lake named Wuliangsuhai in China, in order to determine the response of sediment characteristics to trophic state change. The lake changed from natural state to eutrophication in the late 1970s, creating a Transitional Sediment Layer （TSL） that can be visually used to separate sediments derived from multi-biology and macrophytes. Sediment characteristics were enumerated as a means of corroborating extant eutrophication data from sediment record. Inferences about the timing and trajectory of eutrophication were made using sediment characteristics-based reconstruction. Water content, electrical conductivity, pH, organic matter, nutrient （total nitrogen and total phosphorus） and metals （As, Cd, Co, Cr, Cu, Mn, Ni, Pb, Zn and V） were measured in about 20 different layers of 63-71 cm deep columns of the sediment.     

水平多股淹没射流水力特性及消能分析

针对不能采用挑流消能型式的大型水电工程,提出了多股多层水平淹没射流新型消能型式.它是利用与下游消力池底板具有一定高差且基本平行的多股射流进入消能水体的中间,在每一股射流的四周形成强剪切并各有一个较为稳定的三元紊动旋滚的水平多股淹没射流进行消能.对该消能方式的水力特性和消能特性进行理论分析,推导出三元水平多股淹没射流水力参数计算公式,计算结果表明它是一种流态稳定、适应性强、低雾化、高消能率,有利于降低临底流速的新型消能方式.     

Apparent quantum yield of photosynthesis of winter wheat and its response to temperature and intercellular CO2 concentration under low atmospheric pressure on Tibetan Plateau

The Tibetan Plateau is characterized by lower atmospheric pressure, lower air temperature and high daily and seasonal variation due to high elevation. The photosynthesis of plants is significantly influenced by these alpine environmental factors. Apparent quantum yield (αA) is one of the basic parameters of photosynthesis and mass production. Its accuracy determination is of significance to model photosynthesis of C3 plants and global change on the plateau. In the Lhasa Plateau Ecological Station with 65.4 kPa of atmospheric pressure at an elevation of 3688 m, Li-Cor 6400 portable photosynthesis system was used to measure light response curves of winter wheat in different temperatures and intercellular CO2 concentration (Ci).The slope of light response curve in weak light area of PFD from 0 to 150 μmol m-2 S-1 was used to evaluate the value of αA. The dependence of αA on temperature and intercellular concentration was analyzed. In 30℃, the average value of αAWaS 0.0476 ± 0.0038. It is not quite different from the values in low elevation areas. αA is influenced both by temperature and by the ratio of CO2and O2 partial pressure ([CO2]/[O2]). The measured values in the previous study were much lower.This might be due to systematic errors from instrument and data processing methods. The values of αA decreased linearly with temperature. It decreased 0.0007 in every 1℃ increase of temperature. The decrease slope is similar to those of C3 plants in the previous researches. While [O2] is constant, αA increases with Ciwith a hyperbolic relationship. In comparison with low elevation areas, the αA on the Tibetan Plateau is more sensitive to increase of CO2.