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A Key Pre-distribution Scheme Based on Deployment Information
Shulan Xia,Jilin Wang,Ru-gang Wang 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.11
A scheme of grouping key distribution based on polynomial protocol is proposed and experimentally demonstrated. The grouping idea is ingeniously used in the design of key distribution. The performance is experimental demonstrated by comparing with kinds of random key pre-distribution schemes. The results show that it can not only guarantee the key connected rate but also strengthen the security performance of the network, and this scheme is very suitable for static underwater acoustic communications network.
An Improved Algorithm of Speech Emotion Recognition
Shulan Xia,Jilin Wang,Ru-gang Wang,Li Zhao 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.12
The traditional K-nearest neighbor algorithm existences of the risk of miscarriage of justice, for its shortage a speech emotion recognition algorithm based on fuzzy K-nearest neighbors is proposed. By introducing the fuzzy membership concept, different characteristic parameters for the different contribution of emotion recognition are calculated, and the weighted Euclidean distance is used in speech emotion recognition. The experimental results show the effectiveness of the algorithm.
( Shulan Guo ),( Changhong Yan ),( Liangchen Yu ),( Zhanyong Yang ),( Qingming Wang ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
A large underground transportation hub, which was completed in 2016, is located on the west side of the Nanjing Youth Olympic Center, which is close to the embankment of the Yangtze River. The foundation pit for the hub is of an unusual shape and variable depth, and has required deep excavation. A further complicating factor in construction has been the area’s wide distribution of loose sediments of Quaternary age. The near-surface is primarily comprised of newly deposited soft soil of considerable thickness; the lower part is a riverbed-phase sandy soil containing rich groundwater, and most of it is confined. The B2-J1 area is the core area of the project. The bottoms of the foundation pits were located in the layers of B, C1, and C2, which exhibit poor stability. The site is also close to the Yangtze River, which is characterized by high-level groundwater. After considering the engineering geological conditions, the potential associated geological problems, and the function and shape of the foundation pits, we divided the soil layers of the foundation pits into two areas (the NW area and the SE area). The support structure was designed for the “pit in pit” and the “pit leaning pit” phenomena of the two areas, and the support effect was verified via FLAC3D numerical simulation software.
Study on Mud-Water Separation Test Technology for Shield Slurry in Underground Tunnel
( Changhong Yan ),( Shulan Guo ),( Liang Wen ),( Liangwei Li ),( Xiaoyong Yang ),( Zhiwei Jin ),( Xuyang Fan ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
The construction of urban subway produced a large amount of slurry with hign moisture content. In order to ensure the stability of the excavation face during the construction of the tunnel shield, prevent the spoil from adhering to the shield cutter, a large amount of additives such as water, bentonite, foaming agent are added to the spoil. Therefore, the slurry has the characteristics of uneven particle composition, high moisture content, low permeability and remarkable plastic flow, and its shear strength is almost zero. The transportation and stacking of slurry can cause environmental pollution and damage the ecological environment. To solve this problem, our research team developed a set of mud-water separation test device to carry out research on mud-water separation technology. The Optimal treatment plan for mud-water separation is given by a large number of laboratory tests: when the moisture content of slurry is relatively high, the vacuum negative pressur is firstly used to discharge the free water. When the moisture content drops below the liquid limit, the electroosmosis and the vacuum negative pressure are combined to discharge the bound water, at which time the moisture content in the slurry is close to the plastic limit, thereby achieving slurry hardening. This method has a fast drainage speed and low cost, and has been successfully applied to the Suzhou Metro. It is not only conducive to the resource utilization of slurry, but more importantly, it can effectively protect the ecological environment.
( Changhong Yan ),( Shulan Guo ),( Jinzhong Tan ),( Yang Liu ),( Baotian Xu ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
In recent years, due to the influence of extreme heavy rainfall weather, many large scale landslides occurred on the gentle slopes in Ningzhen area, which characteristically intermittent creep, large scale, and small slip distance (generally less than 30 m). The surface of gentle slope is dominated by fine-grained soil, while the middle and lower layers are dominated by coarse-grained soil, gravel or weathered rockmass, forming a special "binary stratigraphic structure" and the permeability of the soil layer is weak-strong-weak from top to bottom. Under the condition of heavy rainfall weather extremes, the bare rockmass fracture of upper mountain in favor of rainfall infiltration. The middle mountain by precipitation process prone to circular sliding, the lower part of the gentle slope is easy to form “Temporary confined groundwater”, which is prone to landslide under the combined with downslide force of the middle slide body. Based on this new type of landslide geological hazard, the stratum structure and sliding mechanism of the landslide had been researched by using the cybernetics of rockmass structure and preferred plane theory.
Wei Zhang,Shulan Ji,Naixin Wang,Jiding Li 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.27 No.-
In this work, the solution and diffusion properties of n-heptane, thiophene, 2-methylthiophene, 2,5-dimethylthiophene, ethyl sulfide, butyl mercaptan in poly[bis(phenoxy)phosphazene] (PBPP) werestudied by inverse gas chromatography. The infinite dilute activity coefficients and diffusion coefficientswere determined. Effects of temperatures and solvent species on the activity coefficients and diffusioncoefficients were investigated. The results showed that higher temperature was beneficial for bothsolution and diffusion process. Compared with pervaporation desulfurization performance in ourprevious work, the order of infinite dilute diffusion coefficients was in agreement with that of partialflux, which indicated that diffusion decided the permeability within solution–diffusion model.
Jin-ao Duan,Liuying Wang,Shihui Qian,Shulan Su,Yuping Tang 대한약학회 2008 Archives of Pharmacal Research Vol.31 No.8
A new prenylated dihydrobenzofuran derivative (1), was isolated from the rhizomes of Atractylodes lancea DC (Asteraceae), along with ten known compounds, including atractylenolide II (2), ϕ-taraxasteryl acetate (3), taraxerol acetate (4), β-sitosterol (5), stigmasterol (6), β-eudesmol (7), atractylenolide III (8), atractylenolide IV (9), daucosterol (10), and stigmasterol 3-O-β-D-glucopyranoside (11). The structure of the new compound (1) was elucidated as trans-2-hydroxyisoxypropyl-3-hydroxy-7-isopentene-2,3-dihydrobenzofuran-5-carboxylic acid by the combination of 1D, 2D NMR analysis and mass spectrometry, and it was the first reported 2,3-dihydrobenzofuran derivative having a carboxyl residue at C-5 and an isopentene moiety at C-7 contemporaneously. In addition, compound 1 exhibited significant cytotoxicity against cancer cell lines HCT-116 and MKN-45.
Duan, Jin-Ao,Wang, Liuying,Qian, Shihui,Su, Shulan,Tang, Yuping 대한약학회 2008 Archives of Pharmacal Research Vol.31 No.8
A new prenylated dihydrobenzofuran derivative (1), was isolated from the rhizomes of Atractylodes lancea DC (Asteraceae), along with ten known compounds, including atractylenolide II (2), $\varphi$-taraxasteryl acetate (3), taraxerol acetate (4), $\beta$-sitosterol (5), stigmasterol (6), $\beta$-eudesmol (7), atractylenolide III (8), atractylenolide IV (9), daucosterol (10), and stigmasterol 3-O-$\beta$-D-glucopyranoside (11). The structure of the new compound (1) was elucidated as trans-2-hydroxyisoxypropyl-3-hydroxy-7-isopentene-2,3-dihydrobenzofuran-5-carboxylic acid by the combination of 1D, 2D NMR analysis and mass spectrometry, and it was the first reported 2,3-dihydrobenzofuran derivative having a carboxyl residue at C-5 and an isopentene moiety at C-7 contemporaneously. In addition, compound 1 exhibited significant cytotoxicity against cancer cell lines HCT-116 and MKN-45.