The title complex [HSr3（pda）3（H2O）3Cl]n（1, H2pda = pyridine-2,6-dicarboxylic acid） has been prepared under two-step solvothermal conditions. It has been characterized by X-ray single-crystal diffraction, IR, TGA...The title complex [HSr3（pda）3（H2O）3Cl]n（1, H2pda = pyridine-2,6-dicarboxylic acid） has been prepared under two-step solvothermal conditions. It has been characterized by X-ray single-crystal diffraction, IR, TGA-DSC and elemental analysis. The crystal belongs to the trigonal system, space group R-3 with a = 14.484（2）, b = 14.484（2）, c = 21.970（4） A, γ = 120 o, V = 3991.4（11） A3, C（21）H（16）ClN3O（1）5Sr3, Mr = 848.68, Z = 6, Dc = 2.118 g/cm^3, μ = 6.175 mm-1, F（000） = 2484, the final R = 0.0457 and w R = 0.1139. This complex possesses a 3-D structure constructed from [HSr3（pda）3（H2O）3Cl]2 units and connected by coordinated carboxylate groups of pda2-ligands. The topology symbol of this network is（4^（12）6~3）. Luminescent property of the title complex has been investigated at room temperature.展开更多
This paper proposes the stepped coaxial line sensor using the reflection coefficient in microwave range for complex permittivity measuring. The proposed probe is adapted from the conventional SMA connector which is ch...This paper proposes the stepped coaxial line sensor using the reflection coefficient in microwave range for complex permittivity measuring. The proposed probe is adapted from the conventional SMA connector which is cheap and easy to fabricate. The analysis model of the probe has been done by using FDTD method with the reference material such as the distilled water. The stepped SMA probe presents the accurate result compared with the convention one. The permittivity values of the concentrated alcohols of 10%, 15% and 20% as DUTs at 24oC in a frequency range of 0.1 GHz to 6 GHz have been measured using the proposed probe. Also, the measurement of salted butter permittivity has been performed. The measured results are more accurate compared with the commercial probe.展开更多
针对STEP-NC(standard for the exchange of product data,STEP;STEP-compliant numerical control,STEP-NC)复杂型腔的刀具路径生成问题,本文提出了一种基于图论和改进Dijkstra算法的STEPNC复杂型腔最短刀具路径生成方法.在该方法中,...针对STEP-NC(standard for the exchange of product data,STEP;STEP-compliant numerical control,STEP-NC)复杂型腔的刀具路径生成问题,本文提出了一种基于图论和改进Dijkstra算法的STEPNC复杂型腔最短刀具路径生成方法.在该方法中,首先根据走刀行距和基本元素的等距偏置,生成STEPNC复杂型腔封闭等距环.然后,基于图论得到封闭等距环的赋权有向图.最后,利用改进的Dijkstra算法生成STEP-NC复杂型腔最短刀具路径.通过实例验证了所提出方法的可行性和有效性.展开更多
-This paper introduces the main points of design and operation features of a curved combinative breakwater wall which can not only resist storm surge but also roll wave back and which has the functions of seawall, tid...-This paper introduces the main points of design and operation features of a curved combinative breakwater wall which can not only resist storm surge but also roll wave back and which has the functions of seawall, tide protection, anti-wave, land development, traffic and tourism. The new kind of breakwater optimized by wave model test has been utilized in the seawall in the coast regulation project in Zhanjiang City, and good results have been achieved.展开更多
This paper proposes an infeasible interior-point algorithm with full-Newton step for linear complementarity problem,which is an extension of Roos about linear optimization. The main iteration of the algorithm consists...This paper proposes an infeasible interior-point algorithm with full-Newton step for linear complementarity problem,which is an extension of Roos about linear optimization. The main iteration of the algorithm consists of a feasibility step and several centrality steps. At last,we prove that the algorithm has O(nlog n/ε) polynomial complexity,which coincides with the best known one for the infeasible interior-point algorithm at present.展开更多
The article discusses regularity of the formation of high-altitude zones on the mountain territories of Tenir-Too and their relationship with geomorphological complexes and the relief steps. The main purpose was to cl...The article discusses regularity of the formation of high-altitude zones on the mountain territories of Tenir-Too and their relationship with geomorphological complexes and the relief steps. The main purpose was to classify geomorpho-logical complexes and to concretize their morphological characteristics. The belt structure consisting of two mixed rows is analyzed. Excess, elevated, medium-moistened, semi-moistened, semi-arid, and arid types of altitudinal belts were proposed.展开更多
This paper proposes a new full Nesterov-Todd(NT) step infeasible interior-point algorithm for semidefinite programming. Our algorithm uses a specific kernel function, which is adopted by Liu and Sun, to deduce the fea...This paper proposes a new full Nesterov-Todd(NT) step infeasible interior-point algorithm for semidefinite programming. Our algorithm uses a specific kernel function, which is adopted by Liu and Sun, to deduce the feasibility step. By using the step, it is remarkable that in each iteration of the algorithm it needs only one full-NT step, and can obtain an iterate approximate to the central path. Moreover, it is proved that the iterative bound corresponds with the known optimal one for semidefinite optimization problems.展开更多
In this paper, we propose a new infeasible interior-point algorithm with full NesterovTodd (NT) steps for semidefinite programming (SDP). The main iteration consists of a feasibility step and several centrality steps....In this paper, we propose a new infeasible interior-point algorithm with full NesterovTodd (NT) steps for semidefinite programming (SDP). The main iteration consists of a feasibility step and several centrality steps. We used a specific kernel function to induce the feasibility step. The analysis is more simplified. The iteration bound coincides with the currently best known bound for infeasible interior-point methods.展开更多
基金supported by the National Natural Science Foundation of China(No.21501061)Natural Science Foundation of Hubei Province(No.2016CFB147)Doctoral Fund Project of Huanggang Normal University(No.2015001803)
文摘The title complex [HSr3（pda）3（H2O）3Cl]n（1, H2pda = pyridine-2,6-dicarboxylic acid） has been prepared under two-step solvothermal conditions. It has been characterized by X-ray single-crystal diffraction, IR, TGA-DSC and elemental analysis. The crystal belongs to the trigonal system, space group R-3 with a = 14.484（2）, b = 14.484（2）, c = 21.970（4） A, γ = 120 o, V = 3991.4（11） A3, C（21）H（16）ClN3O（1）5Sr3, Mr = 848.68, Z = 6, Dc = 2.118 g/cm^3, μ = 6.175 mm-1, F（000） = 2484, the final R = 0.0457 and w R = 0.1139. This complex possesses a 3-D structure constructed from [HSr3（pda）3（H2O）3Cl]2 units and connected by coordinated carboxylate groups of pda2-ligands. The topology symbol of this network is（4^（12）6~3）. Luminescent property of the title complex has been investigated at room temperature.
文摘This paper proposes the stepped coaxial line sensor using the reflection coefficient in microwave range for complex permittivity measuring. The proposed probe is adapted from the conventional SMA connector which is cheap and easy to fabricate. The analysis model of the probe has been done by using FDTD method with the reference material such as the distilled water. The stepped SMA probe presents the accurate result compared with the convention one. The permittivity values of the concentrated alcohols of 10%, 15% and 20% as DUTs at 24oC in a frequency range of 0.1 GHz to 6 GHz have been measured using the proposed probe. Also, the measurement of salted butter permittivity has been performed. The measured results are more accurate compared with the commercial probe.
文摘针对STEP-NC(standard for the exchange of product data,STEP;STEP-compliant numerical control,STEP-NC)复杂型腔的刀具路径生成问题,本文提出了一种基于图论和改进Dijkstra算法的STEPNC复杂型腔最短刀具路径生成方法.在该方法中,首先根据走刀行距和基本元素的等距偏置,生成STEPNC复杂型腔封闭等距环.然后,基于图论得到封闭等距环的赋权有向图.最后,利用改进的Dijkstra算法生成STEP-NC复杂型腔最短刀具路径.通过实例验证了所提出方法的可行性和有效性.
文摘-This paper introduces the main points of design and operation features of a curved combinative breakwater wall which can not only resist storm surge but also roll wave back and which has the functions of seawall, tide protection, anti-wave, land development, traffic and tourism. The new kind of breakwater optimized by wave model test has been utilized in the seawall in the coast regulation project in Zhanjiang City, and good results have been achieved.
基金Supported by the National Natural Science Fund Finances Projects(71071119)
文摘This paper proposes an infeasible interior-point algorithm with full-Newton step for linear complementarity problem,which is an extension of Roos about linear optimization. The main iteration of the algorithm consists of a feasibility step and several centrality steps. At last,we prove that the algorithm has O(nlog n/ε) polynomial complexity,which coincides with the best known one for the infeasible interior-point algorithm at present.
文摘The article discusses regularity of the formation of high-altitude zones on the mountain territories of Tenir-Too and their relationship with geomorphological complexes and the relief steps. The main purpose was to classify geomorpho-logical complexes and to concretize their morphological characteristics. The belt structure consisting of two mixed rows is analyzed. Excess, elevated, medium-moistened, semi-moistened, semi-arid, and arid types of altitudinal belts were proposed.
基金Sponsored by the National Natural Science Foundation of China(Grant No.11461021)the Natural Science Basic Research Plan in Shaanxi Province of China(Grant No.2017JM1014)Scientific Research Project of Hezhou University(Grant Nos.2014YBZK06 and 2016HZXYSX03)
文摘This paper proposes a new full Nesterov-Todd(NT) step infeasible interior-point algorithm for semidefinite programming. Our algorithm uses a specific kernel function, which is adopted by Liu and Sun, to deduce the feasibility step. By using the step, it is remarkable that in each iteration of the algorithm it needs only one full-NT step, and can obtain an iterate approximate to the central path. Moreover, it is proved that the iterative bound corresponds with the known optimal one for semidefinite optimization problems.
文摘In this paper, we propose a new infeasible interior-point algorithm with full NesterovTodd (NT) steps for semidefinite programming (SDP). The main iteration consists of a feasibility step and several centrality steps. We used a specific kernel function to induce the feasibility step. The analysis is more simplified. The iteration bound coincides with the currently best known bound for infeasible interior-point methods.
