浅析基于GPS RTK技术的城镇地籍测量

GPSRTK测量技术是GPS技术发展的新突破,随着其在地籍测量的深入运用,城镇地籍测量的方法和技术也得到不断的进步和更新。本文结合玉林市国土资源信息中心近年来GPSRTK技术的应用经验,浅析其在城镇地籍测量的应用特点等,同时引入一些相关技术进行研究讨论。     

以文物为依托的旅游规划设计——吴忠董府旅游规划方案设计简介

通过对吴忠董府的保护现状及其周边环境的调研与分析，确定董府及其周边的旅游规划设计方案，以期为同类文物建筑及其周边环境的保护与利用提供借鉴。     

论中国农民增收的制度创新

介绍了我国农业经济发展和农民收入增长的现状及制度创新的必要性。在指出制约我国农民增收存在制度缺陷的基础上，大胆地提出进行制度创新的建设性意见。     

经管类实验中心建设探索

经管类实验在经济学、管理学的教学中有着重要的地位,本文分析了经管类实验室的构建模式以及目标、结构和框架,以实例对软硬件的设置进行了说明.     

Parameter estimation of continuous variable quantum key distribution system via artificial neural networks

Continuous-variable quantum key distribution(CVQKD)allows legitimate parties to extract and exchange secret keys.However,the tradeoff between the secret key rate and the accuracy of parameter estimation still around the present CVQKD system.In this paper,we suggest an approach for parameter estimation of the CVQKD system via artificial neural networks(ANN),which can be merged in post-processing with less additional devices.The ANN-based training scheme,enables key prediction without exposing any raw key.Experimental results show that the error between the predicted values and the true ones is in a reasonable range.The CVQKD system can be improved in terms of the secret key rate and the parameter estimation,which involves less additional devices than the traditional CVQKD system.     

锂二次电池中的原位聚合电解质

聚合物电解质主要分为凝胶聚合物电解质和固态聚合物电解质两种类型,均能够提升锂二次电池的性能.其中,凝胶聚合物电解质是利用增塑剂实现聚合物基质的凝胶化,将有机液态电解液固定在三维网络结构中,因此同时具备液态的离子扩散速率和固态材料的机械性能;而固态聚合物电解质是一种完全没有液态电解质的体系,利用聚合物基体的极性实现锂盐的...     

T型尾翼布局飞机平尾载荷校准技术研究

通过对T型尾翼布局飞机平尾结构分析,简化结构受载情况,利用研制的平尾卡板对某型机平尾进行载荷校准。通过该技术,无需搭建大高度承力架及使用复杂的加载设备,仅人工地面操作即可完成载荷校准试验,降低了该类型机平尾载荷校准试验的难度、风险和成本。     

分析ARP欺骗和ICMP重定向带来的安全问题

文章详细地解释了ARP欺骗及ARP结合ICMP重定向进行高级欺骗的原理．简单探讨了应对这两个 问题的方法,并提供了一个基于Linux的检测工具．     

Multi-polar resistance switching and memory effect in copper phthalocyanine junctions

Copper phthalocyanine junctions, fabricated by magnetron sputtering and evaporating methods, show multi-polar （unipolar and bipolar） resistance switching and the memory effect. The multi-polar resistance switching has not been observed simultaneously in one organic material before. With both electrodes being cobalt, the unipolar resistance switching is universal. The high resistance state is switched to the low resistance state when the bias reaches the set voltage. Generally, the set voltage increases with the thickness of copper phthalocyanine and decreases with increasing dwell time of bias. Moreover, the low resistance state could be switched to the high resistance state by absorbing the phonon energy. The stability of the low resistance state could be tuned by different electrodes. In Au/copper phthalocyanine/Co system, the low resistance state is far more stable, and the bipolar resistance switching is found. Temperature dependence of electrical transport measurements demonstrates that there are no obvious differences in the electrical transport mechanism before and after the resistance switching. They fit quite well with Mott variable range hopping theory. The effect of A1203 on the resistance switching is excluded by control experiments. The holes trapping and detrapping in copper phthalocyanine layer are responsible for the resistance switching, and the interfacial effect between electrodes and copper phthalocyanine layer affects the memory effect.     

一种新型金属配合物的非线性光学特性的研究

利用单光束Z扫描技术,在波长532nm、脉宽8ns的条件下研究了新型的金属有机配合物ECuCl2（BOEP）2]的三阶非线性光学性质。由实验结果发现配位化合物虽然没有明显的非线性吸收性质,但是其三阶非线性折射率比相应配体大很多。探讨了配合物的结构和其三阶非线性光学性质的关系,认为配位化合物的丌共轭离域体系的增大和金属中心离子与配体之间的电子转移是配合物具有更大非线性折射率的主要原因。选择具有π键的配体与金属离子合成为配合物,使其非线性效应明显增强,这对合成性能更好的非线性材料有一定的参考价值。