The letters and visits system plays a vital role in government work, serving as a crucial tool for supervising law enforcement and administrative conduct, ensuring public officials’ integrity, and promoting governanc...The letters and visits system plays a vital role in government work, serving as a crucial tool for supervising law enforcement and administrative conduct, ensuring public officials’ integrity, and promoting governance by law. As Chinese citizens’ political awareness grows, the volume of letters and visits has increased steadily. This paper reviews the current state of letters and visits information construction, identifies challenges and problems in system integration, presents integration ideas for existing systems, and proposes an innovative approach to letters and visits system integration. This research aims to provide valuable insights and guidance for other units undertaking similar system integration efforts.展开更多
基于4期Landsat影像和12.5 m ALOS高程数据,采用地形域分级和扩张过程分析相结合的方法,研究1995—2020年郑州城镇建设用地扩张格局在不同地形域梯度上的变化特征。结果表明:(1)1995—2020年郑州城镇建设用地扩张了2.5倍。郑州扩张的城...基于4期Landsat影像和12.5 m ALOS高程数据,采用地形域分级和扩张过程分析相结合的方法,研究1995—2020年郑州城镇建设用地扩张格局在不同地形域梯度上的变化特征。结果表明:(1)1995—2020年郑州城镇建设用地扩张了2.5倍。郑州扩张的城镇建设用地集中分布在地势平坦、坡度平缓的平原平坡型和丘陵平坡型地形域内,具有显著的梯度变化特征,坡度的约束作用较明显。(2)平原平坡型地域内的城镇建设用地景观破碎度较低,分布更加集聚,空间形态更复杂,而受自然地形的阻隔与限制,丘陵和山区的城镇建设用地分布较分散,空间形态较简单。(3)充分利用自然地形打造山城相依的城乡空间格局和重视城市竖向规划可能是郑州大都市区突破地形约束实现可持续发展的有效途径。展开更多
为了筛选和鉴定ε-聚赖氨酸（ε-poly-lysine,ε-PL）产生菌,试验利用酸性品红从辽宁营口东部山区土壤中筛选到一株放线菌E301,采用薄层层析法分析发酵产物及其酸水解成分,水杨醛保护法分析产物酰胺键连接方式,红外光谱法对产物进行表征...为了筛选和鉴定ε-聚赖氨酸（ε-poly-lysine,ε-PL）产生菌,试验利用酸性品红从辽宁营口东部山区土壤中筛选到一株放线菌E301,采用薄层层析法分析发酵产物及其酸水解成分,水杨醛保护法分析产物酰胺键连接方式,红外光谱法对产物进行表征,通过形态观察、培养特征、生理生化特征并结合16S r DNA序列分析对菌种进行鉴定。结果表明：放线菌E301发酵产物与Dragendorff试剂、甲基橙试剂作用都有沉淀产生,薄层层析显示发酵产物的酸水解成分为单体赖氨酸,产物酰胺键连接方式为ε型,红外光谱图与标准ε-聚赖氨酸一致,形态学及分子生物学鉴定放线菌E301与白色链霉菌的同源性大于99%。说明放线菌E301为白色链霉菌Streptomyces albus。展开更多
The coatings of microorganism-induced calcium carbonate onto the stone surface carried out by using both of the immersion method and coating method were investigated. Various analysis and testing techniques such as sc...The coatings of microorganism-induced calcium carbonate onto the stone surface carried out by using both of the immersion method and coating method were investigated. Various analysis and testing techniques such as scanning electron micrograph （SEM） and X-ray diffraction （XRD） were used to characterize the deposited mineral layer. The adhesive property, acid re- sistance, frost resistance, light and aging resistance, water adsorption and permeability were investigated in detail. The results showed that both immersion method and coating method could produce calcium carbonate granules with sizes ranging from 1 to 10 pm and form a layer of dense mineralization membrane which is about 50 to 100 pm thick. Immersion method was more efficient than coating method. The large cohesive force between calcium carbonate layer and stone materials could improve the acid rain resistance as well as excellent heat tolerance, frost resistance and light aging resistance. The coating process could not only help the stone materials maintain its original permeability with the aid of calcium carbonate layers but also improve the penetration resistance significantly. Therefore, this type of technology shows a great potential in the protection of stone relics.展开更多
文摘The letters and visits system plays a vital role in government work, serving as a crucial tool for supervising law enforcement and administrative conduct, ensuring public officials’ integrity, and promoting governance by law. As Chinese citizens’ political awareness grows, the volume of letters and visits has increased steadily. This paper reviews the current state of letters and visits information construction, identifies challenges and problems in system integration, presents integration ideas for existing systems, and proposes an innovative approach to letters and visits system integration. This research aims to provide valuable insights and guidance for other units undertaking similar system integration efforts.
文摘基于4期Landsat影像和12.5 m ALOS高程数据,采用地形域分级和扩张过程分析相结合的方法,研究1995—2020年郑州城镇建设用地扩张格局在不同地形域梯度上的变化特征。结果表明:(1)1995—2020年郑州城镇建设用地扩张了2.5倍。郑州扩张的城镇建设用地集中分布在地势平坦、坡度平缓的平原平坡型和丘陵平坡型地形域内,具有显著的梯度变化特征,坡度的约束作用较明显。(2)平原平坡型地域内的城镇建设用地景观破碎度较低,分布更加集聚,空间形态更复杂,而受自然地形的阻隔与限制,丘陵和山区的城镇建设用地分布较分散,空间形态较简单。(3)充分利用自然地形打造山城相依的城乡空间格局和重视城市竖向规划可能是郑州大都市区突破地形约束实现可持续发展的有效途径。
文摘为了筛选和鉴定ε-聚赖氨酸（ε-poly-lysine,ε-PL）产生菌,试验利用酸性品红从辽宁营口东部山区土壤中筛选到一株放线菌E301,采用薄层层析法分析发酵产物及其酸水解成分,水杨醛保护法分析产物酰胺键连接方式,红外光谱法对产物进行表征,通过形态观察、培养特征、生理生化特征并结合16S r DNA序列分析对菌种进行鉴定。结果表明：放线菌E301发酵产物与Dragendorff试剂、甲基橙试剂作用都有沉淀产生,薄层层析显示发酵产物的酸水解成分为单体赖氨酸,产物酰胺键连接方式为ε型,红外光谱图与标准ε-聚赖氨酸一致,形态学及分子生物学鉴定放线菌E301与白色链霉菌的同源性大于99%。说明放线菌E301为白色链霉菌Streptomyces albus。
基金supported by the Open Foundation of Joint Laboratory for Extreme Conditions Matter Properties,Southwest University of Science and Technology and Research Center of Laser Fusion,CAEP(Grant No.12zxjk09)the Science and Technology Project of Mian yang City(Grant No.12G031-2)+2 种基金the Scientific Research Fund of Sichuan Provincial Education Department(Grant No.11ZB191)the Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials(Grant No.12zxnp08)the Fundamental Science on Nuclear Waste and Environmental Security Laboratory(Grant No.12zxnp08)
文摘The coatings of microorganism-induced calcium carbonate onto the stone surface carried out by using both of the immersion method and coating method were investigated. Various analysis and testing techniques such as scanning electron micrograph （SEM） and X-ray diffraction （XRD） were used to characterize the deposited mineral layer. The adhesive property, acid re- sistance, frost resistance, light and aging resistance, water adsorption and permeability were investigated in detail. The results showed that both immersion method and coating method could produce calcium carbonate granules with sizes ranging from 1 to 10 pm and form a layer of dense mineralization membrane which is about 50 to 100 pm thick. Immersion method was more efficient than coating method. The large cohesive force between calcium carbonate layer and stone materials could improve the acid rain resistance as well as excellent heat tolerance, frost resistance and light aging resistance. The coating process could not only help the stone materials maintain its original permeability with the aid of calcium carbonate layers but also improve the penetration resistance significantly. Therefore, this type of technology shows a great potential in the protection of stone relics.
