浙江省近34年年平均风速序列均一性检验研究

采用标准正态检验(SNHT:Standard Normal Homogeneity Test)方法.对浙江省36个代表站1971～2004年的年平均风速资料序列进行均一性检验.结果表明:36站中有23个测站出现间断,其中因迁站原因造成非均一性的测站有13个,占非均一性总数的57%,环境变化原因有5个,占非均一性总数的22%;原因不明有3个,占非均一性总数的13%;测风仪高度变化、规定变更各为1个,占非均一性总数的4%.迁站是导致风速序列非均一性的主要原因.     

黔中地区一次暖区暴雨的中尺度特征分析

利用自动站加密观测资料、ERA5再分析资料、FY-2F云顶亮温资料和雷达产品资料等,对2019年5月24日夜间黔中地区暖区暴雨过程的中尺度对流系统特征及成因进行分析,结果表明：（1）此次暖区强降水过程具有持续时间长、小时雨强大、强降水范围广等特点;（2）高能高湿的环境及强的大气层结不稳定特征、深厚的暖云层以及较低的抬升凝结高度和自由对流高度,为高效率持续性降水的产生提供了有利条件;（3）本次暖区暴雨主要由2个对流发展旺盛且伸展高度较高的对流云团连续影响造成,其移动路径在黔中地区存在叠加效应;（4）暴雨由积云为主的积层混合降水回波长时间滞留造成,具有明显的“列车效应”,降水强回波质心低,具有热带降水型回波的特征;（5）地面辐合线为对流系统的发生发展提供了较好的动力条件。强降水落区的位置随着地面辐合线的移动而移动,同时强降水落区主要位于地面辐合线左侧的偏北气流内。     

黑龙江嫩江地区三合屯金矿区糜棱岩锆石LA-ICP-MS U-Pb年龄与成矿的关系

三合屯金矿位于黑龙江省嫩江县境内,普遍认为其是韧性剪切带型金矿.本次对采自韧性剪切带中花岗质糜棱岩样品进行了锆石LA-ICP-MS U-Pb定年,以约束剪切带的活动时代,并为金矿化事件提供依据,获得糜棱岩中热液锆石增生边加权平均年龄为162 Ma.因此,矿区在燕山期晚侏罗世经历剪切变形,并且这期变形事件与前人研究的科洛...     

产河豚毒素菌株的筛选、鉴定及透析培养

河豚毒素(Tetrodotoxin, TTX)在镇静、镇痛、麻醉、戒毒等神经性疾病治疗方面效果显著且无致瘾性,因此具有极好的应用前景,但由于其从河豚体内提取的成本过高,所以难以大量推广应用。越来越多的证据表明TTX来源于河豚体内共生的微生物。我们从野生横纹东方鲀(Takifugu oblongus)肝脏中分离得到了一株产TTX较高的芽孢杆菌3G2(Bacillus sp. 3G2),通过ELISA和胶体金的方法检测到其发酵液TTX含量为35 ng/mL。将该菌株接种于专用透析培养器中,不断流加新鲜培养基实现连续培养,同时实现简化分离工艺,对发酵液进行小鼠生物活性检测、TTX试纸条检测,并通过河豚毒素抗体免疫共沉淀纯化得到TTX粗品后进行高效液相色谱鉴定均表明发酵液中含有TTX且含量较高。本研究通过筛选产TTX的优质菌株进一步了证实河豚毒素外源性假说,并初步验证了透析法生产河豚毒素的优越性,为后续商业应用提供实践性基础。     

Spatial pattern reconstruction of regional habitat quality based on the simulation of land use changes from 1975 to 2010

Reconstruction of the spatial pattern of regional habitat quality can revivify the ecological environment background at certain historical periods and provide scientific support for revealing the evolution of regional ecological environmental quality.In this study,we selected 10 driving factors of land use changes,including elevation,slope,aspect,GDP,population,temperature,precipitation,river distance,urban distance,and coastline distance,to construct the CA-Markov model parameters and acquired the land use spatial data for 1975,1980,1985,1990,and 1995 by simulation based on the land use status map for 2010.On this basis,we used the InVEST model to reconstruct the spatial pattern of habitat quality in the study area and conducted classification division and statistical analysis on the computed habitat degradation degree index and the habitat quality index.(1)The results showed that from 1975 to 2010,the habitat degradation degree gradually increased,and the habitat degradation grade spatially presented a layered progressive distribution.Habitat quality presented a constantly decreasing trend.The high-value zones were mainly distributed in the mountainous areas,while the low-value zones were mostly located in built-up areas.During the period of 1975-2010,low-value zones gradually expanded to their surrounding high-value zones,and the high-value zones of habitat quality tended to be fragmented.(2)The spatial-temporal variation characteristics of habitat quality from 1975 to 2010 showed that the regions with low habitat quality were difficult to be restored and mostly maintained their original state;the regions with poor habitat quality,which accounted for 6.40%of the total study area,continued to deteriorate,mainly around built-up areas;the regions with good and superior habitat quality,which accounted for 5.68%of the total study area,were easily converted to regions with bad or poor habitat quality,thus leading to the fragmentation of the regional habitat.(3)From 1975 to 2010,land use changes in the study area were significant and had a huge influence on habitat quality;the habitat quality in the study area decreased consistently,and the area of the regions with bad and poor habitat quality accounted for more than 60%of the total study area.Construction land was the largest factor threatening habitat quality.     

地理栅格数据并行I/O的研究与实现

随着遥感和测绘技术的进步,日益增大的数据量和高效的数据I/O矛盾逐渐凸显。本文针对这个问题提出了地理栅格数据的一种并行I/O模式,并对该I/O模式进行了相应的编程实现。通过设计实验验证其正确性和效率,我们发现相比传统的栅格数据I/O库(GDAL库)而言,采用本文提出的并行I/O模式对应的I/O库将能同时保证结果的正确性和高效性。     

桂平地区寒武系沉积特征

以１∶５万区调资料为主对桂东桂平地区寒武系沉积特征进行描述，根据岩石学、沉积学特征与岩相组合，指出该区以浊流沉积为主。对其中具牵引流沉积特征的夹层一部分与浊流后期转化而成的牵引流有关，一部分是受斜坡导向作用限制的大洋底流。根据浊流滑动方向指出碎屑来源于广西南面的云开古岛弧。     

农业技术转移决策支持系统(DSSAT)新进展

农业技术转移决策支持系统ＤＳＳＡＴ Ｖ３是现阶段比较成熟的作物生产管理计算机决策支持系统，和其前代版本ＤＳＳＡＴＶ２．１相比，它具有更大的灵活性和更完善的功能。作者以近年来对ＤＳＳＡＴ的研究和实践为基础，从ＤＳＳＡＴ Ｖ３外壳和作物模型两方面来阐述其新特点以及应用前景。     

Short-term variations and influencing factors of suspended sediment concentrations at the Heisha Beach,Guangdong, China

Knowledge of sediment variation processes is essential to understand the evolution mechanism of beach morphology changes. Thus, a field measurement was conducted at the Heisha Beach, located on the west coast of the Zhujiang River(Pearl River) Estuary, to investigate the short-term variation in suspended sediment concentrations(SSCs) and the relationship between the SSC and turbulent kinetic energy, bottom shear stress(BSS), and relative wave height. Based on extreme event analysis results, extr...     

Non-minimal derivatively coupled quintessence in the Palatini formalism

The quintessence dark energy model with a kinetic coupling to gravity within the Palatini formalism is studied in this paper. Two different coupling forms: $\hat{R}\partial^{\mu}\phi\partial_{\mu}\phi$ and $\hat {R}_{\mu\nu}\partial^{\mu}\phi\partial^{\nu}\phi$ are analyzed, respectively. We find that both the model with the $\hat{R}\partial^{\mu}\phi\partial_{\mu}\phi$ coupling and the one with the $\hat{R}_{\mu\nu}\partial^{\mu}\phi\partial^{\nu}\phi$ coupling can realize the phantom divide line crossing from phantom to quintessence at late time for its effective equation-of-state. Furthermore, the former can behave like phantom. These features are different from those found in the $\hat {R}\phi^{2}$ coupling case.