无线激光通信在海上大型无人机中的应用

为了提高海上大型无人机无线通信能力，在总结分析国内外机载无线激光通信的技术发展现状、已开展实验情况和技术趋势的基础上，对应用场景进行了规划和设想，对海上大型无人机大气激光通信的性能指标、关键技术、面临的机遇和挑战进行了分析，为无线激光通信在我国海上大型无人机无线激光通信的应用及发展提供了借鉴和参考

Preliminary Analysis of C Sequestration Potential of Blue Carbon Ecosystems on Chinese Coastal Zone

海岸带蓝碳生态系统具有高效的固碳能力,可以潜在地缓解大气CO_2浓度的升高.本文在总结国内外相关研究的基础上,对中国海岸带蓝碳生态系统的碳汇潜力进行了初步分析.结果表明,中国海岸带蓝碳生态系统生境总面积为1623~3850 km~2,年平均碳封存量为0.349~0.835 Tg C.然而,随着滩涂围垦、资源过度利用、环境污染以及气候变化等因素影响的加剧,中国蓝碳生态系统正处于急剧退化之中.通过对海岸带蓝碳碳汇形成过程的阐述,有助于对其重要性的认识;基于沿海地区人类活动特点与全球气候变化趋势,探讨了滩涂围垦、资源过度利用、水体污染和海平面上升对我国海岸带蓝碳生态系统造成的威胁;同时提出了为维持海..

中国海岸带蓝碳生态系统碳汇潜力的初步分析

海岸带蓝碳生态系统具有高效的固碳能力,可以潜在地缓解大气CO_2浓度的升高.本文在总结国内外相关研究的基础上,对中国海岸带蓝碳生态系统的碳汇潜力进行了初步分析.结果表明,中国海岸带蓝碳生态系统生境总面积为1623~3850 km~2,年平均碳封存量为0.349~0.835 Tg C.然而,随着滩涂围垦、资源过度利用、环境污染以及气候变化等因素影响的加剧,中国蓝碳生态系统正处于急剧退化之中.通过对海岸带蓝碳碳汇形成过程的阐述,有助于对其重要性的认识;基于沿海地区人类活动特点与全球气候变化趋势,探讨了滩涂围垦、资源过度利用、水体污染和海平面上升对我国海岸带蓝碳生态系统造成的威胁;同时提出了为维持海..

New Indium(III) Phosphate CsIn[PO_3(OH)]_2 with a New Type of Structure

水热法合成了新结构类型化合物CsIn[PO3(OH)]2,并通过单晶X--射线衍射表征结构。标题化合物空间群为P121/c1(No.14),晶体学参数为:Mr=439.69,mP56,a=0.53286(6)nm,b=0.91653(7)nm,c=1.47839(14)nm,β=93.849(9)°,V=0.7204(1)nm3,Z=4,Dx=4.054g·cm-3,μ=8.713mm-1,F(000)=800,R1=0.0325,wR2=0.0874。在该化合物中,2个InO6八面体和4个PO4四面体形成交连的六元环柱,并沿a轴方向形成近六方密堆积并连接成Cs+离子占据的十二元环结构隧道,六元环和十二元环连接构筑了三维网络结构。与类似化学计量比化合物Na2In2[PO3(OH)]4·H2O比较,标题化合物中十二元环的形成明显取决于隧道阳离子的大小,其拓扑构造可看作扩展的6,3-网格连接,化合物RbIn[PO3(OH)]2与之同构。A cesium indium hydrated phosphate, CsIn2, was synthesized under mild hydrothermal conditions, and the crystal structures were characterized by single crystal X-ray diffraction method. CsIn2 has a new type of crystal structure. Crystallographic data are as following: Mr=439.69, monoclinic, mP56, P1 21/c 1 (No.14) , a=0.532 86(6) nm, b=0.916 53(7) nm, c=1.478 39(14) nm, β=93.849(9)°, V=0.720 4(1) nm3, Z=4, Dx=4.054 g·cm-3, μ=8.713 mm-1, F(000)=800, R1=0.032 5, wR2=0.087 4 for 116 variables and 1 502 contributing unique reflections. The structure is characterized by 6-membered column with cross-section formed by two InO6 octahedra and four PO4 tetrahedra. The condensation of the column forms an almost hexagonal close-packing array along a axis, resulting in close packing of 12-membered-ring channels occupied by Cs+ cations. The connections of the columns and channels result in a three-dimensional network structure. The formation of the 12-membered ring in these structures seems clearly governed by the cation size by comparing to Na2In24·H2O with the similar stoichiometry. The topological construction of the title structure can be considered as an augmented 6,3-net. RbIn2 is isotypic to the Cs compound. CSD: 391266.国家自然科学基金资助项目(No.50332050);; 国家杰出青年基金资助项目(No.20025101);; 国家科技部“863”计划(No.2002AA324070);; 上海市科委光科技项目(No.D11161015)资

Hydrothermal Synthesis and Characterizations of Na_6In_4[P_7O_(24)(OH)_5]·4H_2O

A new sodium indium phosphate Na 6In 4[P 7O 24(OH) 5]·4H 2O was synthesized under a mild hydrothermal condition and its structure was determined by means of single-crystal X-ray diffraction methods. The title compound crystallizes in a hexagonal system, space group P6 3, with a= 0.950 23(5) nm, b=0.950 23(5) nm, c=1.694 2(2) nm, α=90°, β=90°, γ=120°, V=1.324 8(2) nm 3, Z=8, structure refined to R=0.052 8 and wR=0.116 5 for 2 134 independent observed reflections. The three-dimensional network structure consists of helical chains formed by apex-sharing polyhedra. The connection of the chains results in 4- and 8-polyhedral rings and cages centered by three indium metal connecting oxygen atoms formed by three 4-rings. The three-connected oxygen atom is firstly observed in indium phosphate systems.国家自然科学杰出青年基金 (批准号 :2 0 0 2 5 10 1);; 上海市光科技发展基金 (批准号 :0 2 2 2 610 15 );; 国家科技部“八六三”计划 (批准号 :2 0 0 2 AA3 2 40 70 )资

Highly Efficient Release of Glycopeptides from Hydrazide Beads by Hydroxylamine Assisted PNGase F Deglycosylation for N‑Glycoproteome Analysis

References used in supplementary material. (DOCX 21 kb

Hydrothermal synthesis and characterizations of Na6In4[P7O24(OH)(5)]center dot 4H(2)O

A new sodium indium phosphate Na6In4[P7O24(OH)(5)] (.) 4H(2)O was synthesized under a mild hydrothermal condition and its structure was determined by means of single-crystal X-ray diffraction methods. The title compound crystallizes in a hexagonal system, space group P6(3), with a = 0.950 23(5) nm, b = 0.950 23(5) nm, c = 1.694 2(2) nm, alpha = 90degrees, beta = 90degrees, gamma = 120degrees, V = 1.324 8(2) nm(3), Z = 8, structure refined to R = 0.052 8 and wR = 0.116 5 for 2 134 independent observed reflections. The three-dimensional network structure consists of helical chains formed by apex-sharing polyhedra. The connection of the chains results in 4- and 8-polyhedral rings and cages centered by three indium metal connecting oxygen atoms formed by three 4-rings. The three-connected oxygen atom is firstly observed in indium phosphate systems