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| 1 | 基于遥感和作物生长模型的作物产量差估测显示文摘传统的作物生长模型很难模拟大田的实际产量,因为大量的数据、复杂的数学运算以及误差传递限制了作物生长模拟模型的运用。目前为止实际产量仅能通过观测和实地调查获得。该文将NOAA-14AVHRR遥感获取的冠层温度信息引入作物生长模型,利用冠气温差计算作物水分胁迫系数,可以近似地估计区域作物实际生长速率和产量,进而建立了遥感-作物模拟复合模型PS-X,提出了估算区域作物实际产量的方法。PS-X模型可在不同层次模拟作物的生长和产量,在PS-1、PS-2、PS-X水平计算的分别是作物的光温生产潜力、水分限制下的生产力和实际产量。利用该模型,论文分别模拟了邯郸地区1998年夏玉米的光温生产潜力、水分限制下的生产力和实际产量,并通过比较不同模拟水平下产量和农户调查产量进行区域产量差分析。结果表明:PS-1和PS-2水平之间的产量差主要由水分和土壤质地差异造成;PS-2与PS-X水平间的平均产量差异较大,占总产量差(PS-1与PS-X水平之差)的81.4%,主要由田间管理差异造成;对于平原地区,夏玉米产量估测精度可达90%以上;砂质土壤区估算冠层温度和水分胁迫系数比壤质、粘质土壤区要高,因此砂质土壤区模拟作物产量较低,这与PS-2计算结果、农户调查数据一致。研究证实,区域上应用遥感瞬时温度信息建立遥感-作物模拟复合模型进行估产是可行的。 | 王纯枝 宇振荣 辛景峰 Driessen P.M 刘云慧 | 2005 | 农业工程学报2005，21，7： | 33 |
| 2 | Co-expression of CDX2 and MUC2 in gastric carcinomas: Correlations with clinico-pathological parameters and prognosis显示文摘AIM: To evaluate the role of CDX2 homeobox protein as a predictor for cancer progression and prognosis as well as its correlation with MUC2 expression. CDX2 represents a transcription factor for various intestinal genes (including MUC2) and thus an important regulator of intestinal differentiation, which could previously be identified in gastric carcinomas and intestinal metaplasia.METHODS: Formalin-fixed and paraffin-embedded tissues from 190 gastric carcinoma patients were stained with monodonal antibodies recognizing CDX2 and MUC2, respectively. Immunoreactivity was evaluated semiquantitatively and statistical analyses including χ2 tests, uni- and multi-variate survival analyses were performed.RESULTS: CDX2 was mostly expressed in a nuclear or supranuclear pattern, whereas MUC2 showed an almost exclusive supranuclear reactivity. Both antigens were present in >80% of areas exhibiting intestinal metaplasia. An immunoreactivity in >5% of the tumor area was observed in 57% (CDX2) or in 21% (MUC2) of the carcinomas. The presence of both molecules did not correlate with WHO,significantly stronger vlUC2 expression in mucinous tumors). CDX2 correlated with a lower pT and pN stage in the subgroups of intestinal and stage I cancers and was associated with MUC2 positivity. A prognostic impact of CDX2 or MUC2 was not observed. CONCLUSION: CDX2 and MUC2 play an important role in the differentiation of normal, inflamed, and neoplastic gastric tissues. According to our results, loss of CDX2 may represent a marker of tumor progression in early gastric cancer and carcinomas with an intestinal phenotype. | Kristina Roessler Stefan P.M(o|¨)nig Paul M.Schneider Franz-Georg Hanisch Stephanie Landsberg Juergen Thiele Arnulf H.H(o|¨)lscher Hans P.Dienes Stephan E.Baldus | 2005 | World Journal of Gastroenterology2005，11，21： | 15 |
| 3 | 冬小麦遥感冠层温度监测土壤含水量的试验研究显示文摘在冬小麦主要生育期(2002年4月初到5月底),对不灌溉的冬小麦测定了冠层温度、地温、气温以及土壤含水量,计算了冠气温差且分析了冠层温度和冠气温差与不同土层厚度的土壤含水量相关关系。结果表明:14∶00的冠层温度能较好地反映20cm土层的土壤含水量变化,但与其它各土层相关性有较大的波动性;14∶00的冠气温差能较好地反映40cm以上土层的土壤含水量变化,二者的相关性很高,在20cm、40cm土层,两者相关系数R2分别为0 98866、0 99389,这为用区域遥感数据反演主要生育期冬小麦的冠气温差进而监测区域40cm土壤含水量提供了实验性的依据;拔节期和灌浆期,用14∶00冠气温差来拟合各土壤层的土壤含水量有较高的精度,从而为用区域遥感数据监测区域土壤含水量提供了经验性的模型。 | 刘云 宇振荣 孙丹峰 Driessen P.M 刘云慧 王纯枝 | 2004 | 水科学进展2004，15，3： | 14 |
| 4 | 生物强化处理油田含油污泥的试验研究显示文摘采用油泥、菌剂及其他添加物充分混合后堆放的方法,进行了3种条件下的微生物对含油污泥的强化分解研究。结果表明,在菌剂和锯末的共同作用下,经过45d后,污泥含油量从24%下降到11%,去除率达到54%;而菌剂单独作用下,含油量下降到16%,去除率达为33%;在没有菌剂作用下,含油量仍然保持在20%以上。对处理过程中pH变化特性进行了研究。试验说明,生物强化分解是含油污泥处理的有效途径。 | 欧阳威 刘红 于勇勇 许增德 Valentina P.M urygina | 2005 | 农业环境科学学报2005，24，2： | 11 |
| 5 | 土壤中3,4-二氯苯胺降解动力学及其生态毒性显示文摘敌草隆 ( diuron)是一种广泛被应用的取代脲类除草剂 ,其主要降解产物为 3,4-二氯苯胺 [1 ] .研究 3,4-二氯苯胺在不同土壤中的降解动力学规律 ,并用土壤环境指示动物弹尾目 ( Collembola)跳虫 ( Folsomia candida)跟踪指示该化合物在进一步降解过程中的毒性 .结果表明 :3,4-二氯苯胺在土壤中的降解行为可用一级反应动力学方程来较好地描述 ,其生态毒性明显高于母体化合物敌草隆 ,该化合物在粘土中的残留量低于砂土 ,但毒性却明显大于砂土 ,指出应注重同步研究农药降解产物的环境化学及生态毒性行为 . | 蒋新 周建民 P.Müller | 2000 | 环境科学2000，21，5： | 4 |
| 6 | Boron solubility in Fe–Cr–B cast irons显示文摘 | Changqing Guo P.M Kelly | 2002 | Materials Science & Engineering A2002，，1： | 2 |
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