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Studies on Effect of Syrup Concentration and Drying Modes on Quality of Kesar Mango Slices 被引量:1
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作者 B. K. Sakhale V. N. Pawar 《Journal of Food Science and Engineering》 2011年第4期263-270,共8页
An attempt was made to preserve mango slices by treating with 2% calcium chloride solution followed by dipping into sugar syrup of different concentrations i.e. 50°, 60° and 70 °Brix respectively. The t... An attempt was made to preserve mango slices by treating with 2% calcium chloride solution followed by dipping into sugar syrup of different concentrations i.e. 50°, 60° and 70 °Brix respectively. The treated slices were subjected for drying in different modes of drying (oven, microwave oven and cabinet tray drying) and analyzed for various physico-chemical and organoleptic quality characteristics. The study revealed that the osmo-air dried slices of mango produced with partial dehydration facilitated by osmotic agent (sugar syrup of 60 °Brix. A fruit: sugar syrup ratio of 1:4 (w/v) for 18 h at 40 ℃ temperature) followed by mechanical drying showed superiority in sensorial quality attributes over other concentrations of ingredients and the rest of the modes of drying. The good quality osmotically dehydrated mango slices could be preserved with maximum retentions of vitamins with better dehydration, rehydration and sensorial quality characteristics. 展开更多
关键词 Mango slices calcium chloride SYRup drying mode osmo-air drying sensorial quality.
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Fast Evaluation of Oxidative DNA Damage by Liquid Chromatography-Electrospray Tandem Mass Spectrometry Coupled With Precision-cut Rat Liver Slices
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作者 JIANG YUE PENG WANG +3 位作者 YING-HUI LIU JUN-YU WU JIE CHEN REN-XIU PENG 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2007年第5期386-391,共6页
Objective To establish a fast and sensitive method for the detection of 8-hydroxy-2’-deoxyguanosine (8-OHdG) in precision-cut rat liver slices by HPLC-MS/MS and to investigate isoniazid (INH) -induced oxidative D... Objective To establish a fast and sensitive method for the detection of 8-hydroxy-2’-deoxyguanosine (8-OHdG) in precision-cut rat liver slices by HPLC-MS/MS and to investigate isoniazid (INH) -induced oxidative DNA damage. Methods Precision-cut liver slices (300 μm) were prepared from male rats, and incubated with INH (0.018 mol/L) for 2 h after 1 h preincubation. DNA in the slices was extracted and digested into free nucleosides at 37℃ . The samples were injected into HPLC-MS/MS after the proteins were removed. The level of oxidative DNA damage was estimated using the ratio of 8-OHdG to deoxyguanosine (dG). Results The limit of detection of 8-OHdG was 1 ng/mL (S/N=3) and the intra-assay relative standard variation was 3.38% when one transition 284.3/168.4 was used as a quantifier and another two transitions 284.3/140.2, 306.1/190.2 as qualifiers. 8-OHdG and dG were well separated, as indicated by elution at 10.02 and 7.37 min, respectively. INH significantly increased the ratio of 8-OHdG to dG in rat liver slices (P〈0.05). Conclusion 8-OHdG in precision-cut liver slices could be sensitively determined by HPLC-MS/MS. HPLC-MS/MS coupled with precision-cut tissue slices is a fast and reliable analytical technique to evaluate oxidative DNA damage of target tissues caused by procarcinogens and cytotoxins. 展开更多
关键词 ISONIAZID 8-Hydroxy-2'-deoxyguanosine HPLC-MS/MS Precision-cut liver slices
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Effects of Cultivar, Frying Temperature and Slice Thickness on Oil Uptake and Sensory Quality of Potato Crisps Processed from Four Kenyan Potato Cultivars
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作者 G. O. Abong M. W. Okoth +1 位作者 J. K. Imungi J. N. Kabira 《Journal of Agricultural Science and Technology(A)》 2011年第2X期156-163,共8页
The effects of potato cultivar, frying temperature and slice thickness on oil uptake and sensory quality of potato crisps were investigated in four Kenyan cultivars. Potato tubers were peeled, washed and cut into slic... The effects of potato cultivar, frying temperature and slice thickness on oil uptake and sensory quality of potato crisps were investigated in four Kenyan cultivars. Potato tubers were peeled, washed and cut into slices of thickness 1.0 mm, 1.5 mm and 2.0 mm. Each size was fried at a constant temperature of 170 ℃ for 3-5 minutes. For frying temperature evaluation, the potatoes for all cultivars were cut into a uniform thickness of 1.5 mm and fried at temperatures of 160, 170 and 180 ℃ for 2-5 minutes. Crisps made from the four cultivars differed significantly (P 〈 0.05) in oil absorbed which ranged from 35.12% in Dutch Robyjn to 36.52% in clone 391,691.96. Tuber dry matter differed significantly (P 〈 0.05) among the cultivars ranging from 20.99% in clone 391691.96 to 25.29% in variety Dutch Robyjn. Tuber dry matter content was found to be negatively correlated to oil content of crisps; oil content increased with decrease in dry matter content. For each cultivar, the oil content of crisps differed significantly (P 〈 0.05) with temperatures and was higher at frying temperatures of 160 ℃ and lowest at 180 ℃, respectively. The oil content was significantly (P 〈 0.05) higher in slices of 1.0 mm thick than in slices of 1.5 mm and 2.0 mm; the amount ofoil absorbed decreased with increase in slice thickness. There was significant correlation (P 〈 0.05, r = -0.834) between oil content as determined in the laboratory and sensory scores. Results showed that high dry matter, slice thickness and temperature of frying resulted in reduced oil absorption by crisps during processing. 展开更多
关键词 slice thickness frying temperatures oil content potato crisps CULTIVAR
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Fluorescence detection of Europiumdoped very small superparamagnetic iron oxide nanoparticles in murine hippocampal slice cultures
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作者 Martin Pohland Yuske Kobayashi Jana Glumm 《Neural Regeneration Research》 SCIE CAS CSCD 2018年第4期637-638,共2页
In the late 1980s,superparamagnetic iron oxide nanoparticles(SPIO)moved into focus as contrast agents in magnetic resonance imaging(MRI),due to their strong relaxivity and resulting higher resolution of images.At ... In the late 1980s,superparamagnetic iron oxide nanoparticles(SPIO)moved into focus as contrast agents in magnetic resonance imaging(MRI),due to their strong relaxivity and resulting higher resolution of images.At the time,no one anticipated their high potential in basic research or for medical diagnostic andtreatment. Since then, SPIO have been evaluated notonly as spe- cific markers for MRI, but also for cell labeling and tracking (Li et al., 2013). 展开更多
关键词 EU Fluorescence detection of Europiumdoped very small superparamagnetic iron oxide nanoparticles in murine hippocampal slice cultures
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基于SLICE模型的东台“三医”协同发展和治理实践分析
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作者 宋大平 刘志 甘戈 《中国医院管理》 北大核心 2024年第10期20-22,共3页
医疗、医保、医药协同发展和治理是实现卫生健康事业高质量发展和深化医药卫生体制改革的关键。剖析总结了江苏省东台市医疗、医保、医药协同发展和治理改革在战略设计(导航仪)、组织领导(引擎机)、资源统合(燃料箱)、协同工具(润滑剂)... 医疗、医保、医药协同发展和治理是实现卫生健康事业高质量发展和深化医药卫生体制改革的关键。剖析总结了江苏省东台市医疗、医保、医药协同发展和治理改革在战略设计(导航仪)、组织领导(引擎机)、资源统合(燃料箱)、协同工具(润滑剂)和评估反馈(晴雨表)全闭环方面的经验举措,提炼为“三医”协同发展和治理的SLICE模型,并提出在坚持以改革创新激发“三医”协同发展和治理活力的基础上,充分发挥各级党委、政府的主导作用,建立“三医”协同发展和治理跨部门议事协调机制,吸纳多元主体参与协同治理并强化协同治理措施的系统性,以确保“三医”协同发展和治理改革行稳致远。 展开更多
关键词 “三医”协同发展和治理 slice模型 医药卫生体制改革
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基于Slice的H.264并行视频编码算法 被引量:11
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作者 宁华 梅铮 李锦涛 《计算机工程》 EI CAS CSCD 北大核心 2005年第4期181-182,211,共3页
从H.264视频编码标准的特点出发,提出了基于Slice级别的H.264视频编码并行算法,该算法不仅能够保证节点间的负载平衡,减少各节点间数据的依赖关系,还充分利用了已有的计算能力。最后给出了在曙光3000上的实验结果。
关键词 H.264 视频编码 并行 slice
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Effect of slice scope on data slice-based class cohesion metrics 被引量:3
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作者 周毓明 徐宝文 《Journal of Southeast University(English Edition)》 EI CAS 2008年第2期174-177,共4页
This paper suggests that a single class rather than methods should be used as the slice scope to compute class cohesion. First, for a given attribute, the statements in all methods that last define the attribute are c... This paper suggests that a single class rather than methods should be used as the slice scope to compute class cohesion. First, for a given attribute, the statements in all methods that last define the attribute are computed. Then, the forward and backward data slices for this attribute are generated by using the class as the slice scope and are combined to compute the corresponding class data slice. Finally, the class cohesion is computed based on all class data slices for the attributes. Compared to traditional cohesion metrics that use methods as the slice scope, the proposed metrics that use a single class as slice scope take into account the possible interactions between the methods. The experimental results show that class cohesion can be more accurately measured when using the class as the slice scope. 展开更多
关键词 COHESION class data slice metrics OBJECT-ORIENTED
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A Slice Analysis-Based Bayesian Inference Dynamic Power Model for CMOS Combinational Circuits
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作者 陈杰 佟冬 +2 位作者 李险峰 谢劲松 程旭 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2008年第3期502-509,共8页
To improve the accuracy and speed in cycle-accurate power estimation, this paper uses multiple dimensional coefficients to build a Bayesian inference dynamic power model. By analyzing the power distribution and intern... To improve the accuracy and speed in cycle-accurate power estimation, this paper uses multiple dimensional coefficients to build a Bayesian inference dynamic power model. By analyzing the power distribution and internal node state, we find the deficiency of only using port information. Then, we define the gate level number computing method and the concept of slice, and propose using slice analysis to distill switching density as coefficients in a special circuit stage and participate in Bayesian inference with port information. Experiments show that this method can reduce the power-per-cycle estimation error by 21.9% and the root mean square error by 25.0% compared with the original model, and maintain a 700 + speedup compared with the existing gate-level power analysis technique. 展开更多
关键词 slice analysis Bayesian inference power model CMOS combinational circuit
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Influence of Different Drying Temperatures on Quality of Balsam Pear Slices
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作者 谷俊华 黄斐 《Agricultural Science & Technology》 CAS 2017年第8期1513-1516,1535,共5页
[Objective] The aim was to investigate the effects of different drying temperatures on the physiochemical properties and antioxidant activity of balsam pear slices. [Method] Balsam pear slices were dried at different ... [Objective] The aim was to investigate the effects of different drying temperatures on the physiochemical properties and antioxidant activity of balsam pear slices. [Method] Balsam pear slices were dried at different hot air temperatures, 40, 50, 60, 70 and 80 ℃. [Result] The polyphenols content was highest (2.83 mg/g) in the balsam pear slices dried at 50 ℃, and the flavonoids content was highest (2.584 mg/g) in those dried at 60 ℃. Different drying temperatures had a great impact on the antioxidant capacity of polyphenols in balsam pear. The balsam pear slices dried at 50 ℃ showed the strongest capacity for scavenging DPPH free radicals with IC50 of 0.015 mg/ml, and those dried at 80 ℃ showed the strongest capacity for removing ABTS free radicals with IC50 of 0.0689 mg/ml. [Conclusion] The hot air temperature of 50 ℃ had the least impact on the quality of balsam pear slices. 展开更多
关键词 Balsam pear slice Hot air drying Physiochemical properties Antioxidant activity
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Comparison of the Effects of H_2O_2 and Salicylic Acid on Alternative Respiratory Pathway in Aged Potato Tuber Slices
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作者 梁五生 梁厚果 《Acta Botanica Sinica》 CSCD 2002年第3期287-291,共5页
The influences of exogenous H 2O 2 and salicylic acid (SA) treatments on the alternative respiratory pathway (ARP) in aged potato (Solanum tuberosum L.) tuber slices were compared. The results showed that both H 2O... The influences of exogenous H 2O 2 and salicylic acid (SA) treatments on the alternative respiratory pathway (ARP) in aged potato (Solanum tuberosum L.) tuber slices were compared. The results showed that both H 2O 2(5.0 mmol/L) and SA (0.1 mmol/L) treatments had a significant inducing effect on ARP capacity (V alt ) and its ratio to total respiration (V alt /V t) in potato slices aged for 24 h. With a monoclonal antibody against the alternative oxidase (AOX), Western blotting results showed that both H 2O 2 and SA treatments increased the AOX expression levels in aged potato tuber slices. However, the results of oxygen isotope discrimination experiments showed that H 2O 2 had no influence on the in vivo ARP activity (ρV alt ) and its contribution to V t(expressed as ρV alt /V t) in potato slices aged for 24 h, but SA had a significant influence on the ρV alt and ρV alt /V t values of the aged potato tuber slices. These results indicate that there are differences between the effects of H 2O 2 and SA on ARP in plant tissues. Both of them possess the ability to induce ARP capacity through inducing AOX expression. However, SA can simultaneously stimulate the operation of ARP, but H 2O 2 can not. 展开更多
关键词 alternative respiratory pathway H 2O 2 salicylic acid aged potato tuber slices
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Ada软件SLICE分析器(ASA)
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作者 钱红兵 《计算机应用研究》 CSCD 1996年第3期22-24,共3页
对程序进行分析和测试是提高软件可靠性的有效途径。本文介绍的Ada软件SLICE分析器是一种对被测软件进行静态数据流分析的工具,它能缩小用户分析与检查被测程序的范围,帮助用户及时找到所关心的程序段和语句,为保证Ada软... 对程序进行分析和测试是提高软件可靠性的有效途径。本文介绍的Ada软件SLICE分析器是一种对被测软件进行静态数据流分析的工具,它能缩小用户分析与检查被测程序的范围,帮助用户及时找到所关心的程序段和语句,为保证Ada软件系统的质量、提高开发与维护大型复杂软件系统的效率提供支持。 展开更多
关键词 ADA语言 ASA slice 软件 可靠性 程序分析
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实交错代数上slice正则函数的逼近定理
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作者 陈英伟 陈灿虎 张宝兴 《河北师范大学学报(自然科学版)》 CAS 2022年第1期1-10,共10页
研究了实交错代数上slice正则函数的Runge定理和Carelman型逼近定理.作为特例,在四元数和八元数情形下得出相应的结论.
关键词 slice正则函数 Runge定理 Carleman定理 实交错代数
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Lipopolysaccharide preconditioning induces protection against lipopolysac-charide -induced neurotoxicity in organotypic midbrain slice culture 被引量:3
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作者 丁晔 李良 《Neuroscience Bulletin》 SCIE CAS CSCD 2008年第4期209-218,共10页
Objective To identify the protective effect of lipopolysaccharide (LPS) preconditioning against LPS-induced inflammatory damage in dopaminergic neurons of midbrain slice culture and the possible mechanisms. Methods ... Objective To identify the protective effect of lipopolysaccharide (LPS) preconditioning against LPS-induced inflammatory damage in dopaminergic neurons of midbrain slice culture and the possible mechanisms. Methods After cultured in vitro for 14 d, the rat organotypic midbrain slices were pretreated with different concentrations (0, 1, 3, 6 or 10 ng/mL) of LPS for 24 h followed by treatment with 100 ng/mL LPS for 72 h. The whole slice viability was detelmined by measurement of the activity of lactic acid dehydrogenase (LDH). Tyrosine hydroxylase-immunoreactive (TH-IR) neurons and CD 1 1 b/c equivalent-immunoreactive (OX-42-IR) microglia in the slices were observed by immunohistochemical method, and tumor necrosis factor-α (TNF-α levels in the culture media were detected by enzymelinked immunosorbent assays (ELISA). Results In the slices treated with 100 ng/mL LPS for 72 h, the number of TH-IR neurons reduced from 191± 12 in the control slices to 46±4, and the LDH activity elevated obviously (P 〈 0.01), along with remarkably increased number of OX-42-IR cells and production of TNF-α (P 〈 0.01). Preconditioning with 3 or 6 ng/mL LPS attenuated neuron loss (the number of TH-IR neurons increased to 126± 12 and 180± 13, respectively) and markedly reduced LDH levels (P 〈 0.05), accompanied by significant decreases of OX-42-IR microglia activation and TNF-α production (P 〈 0.05). Conclusion Low-dose LPS preconditioning could protect dopaminergic neurons against inflammatory damage in rat midbrain slice culture, and inhibition of microglial activation and reduction of the proinflammatory factor TNF-α production may contribute to this protective effect. Further understanding the underlying mechanism of LPS preconditioning may open a new window for treatment of Parkinson's disease. 展开更多
关键词 LIPOPOLYSACCHARIDE PRECONDITIONING neuroprotection organotypic midbrain slice culture dopaminergic neuronsinflammation MICROGLIA tumor necrosis factor-α
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使用两套Slice解码器的H.264硬件解码器设计 被引量:2
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作者 王晓亮 周开伦 林涛 《有线电视技术》 2008年第12期103-105,共3页
在H.264协议中,设定Slice的目的是为了限制误码的扩散和传输,应使得编码的Slice相互之间保持独立。而当一幅图像被划分为若干个Slice后,使用两套Slice编码器对图像进行并行的编码可以大大加快编码速度。而与此同时,需要对编出的码流进... 在H.264协议中,设定Slice的目的是为了限制误码的扩散和传输,应使得编码的Slice相互之间保持独立。而当一幅图像被划分为若干个Slice后,使用两套Slice编码器对图像进行并行的编码可以大大加快编码速度。而与此同时,需要对编出的码流进行实时解码才能够使得编码器发挥重大的作用。将一幅图像按一个宏块行为一个Slice划分的两套Slice硬件解码器设计已完成。根据H.264协议,两套Slice解码器设计的关键环节是两套Slice解码器在Deblocking Filter部分的交互。设计完成的两套Slice解码器已能够对两套Slice编码器传输过来的1080i/1080p视频码流进行实时解码。 展开更多
关键词 H.264 交互 两套slice解码器 去块滤波器
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Upgrade of macromolecular crystallography beamline BL17U1at SSRF 被引量:9
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作者 Qi-Sheng Wang Kun-Hao Zhang +10 位作者 Yin Cui Zhi-Jun Wang Qiang-Yan Pan Ke Liu Bo Sun Huan Zhou Min-Jun Li Qin Xu Chun-Yan Xu Feng Yu Jian-Hua He 《Nuclear Science and Techniques》 SCIE CAS CSCD 2018年第5期58-64,共7页
Beamline BL17 U1 at Shanghai Synchrotron Radiation Facility is an energy-tunable macromolecular crystallography beamline that has been in user operation since 2009. Growing demand from the user community for a small b... Beamline BL17 U1 at Shanghai Synchrotron Radiation Facility is an energy-tunable macromolecular crystallography beamline that has been in user operation since 2009. Growing demand from the user community for a small beam and related experimental methods have motivated upgrades of the devices in the endstation.Minibeam modes have already been developed for operation. A self-integrated diffractometer reduces the sphere of confusion of the rotatory axis to 1μm. The new diffractometer is equipped with an upgraded on-axis viewing system that can improve the resolving power. Additionally,the area detector was also upgraded to the newest generation of detectors, the EIGER X 16 M, which can collect data at 133 Hz. After these upgrades, the endstation became virtually new. This paper covers the upgrade of the endstation devices and gives the first data collection results. 展开更多
关键词 Shanghai Synchrotron Radiation Facility Macromolecular CRYSTALLOGRAPHY Endstation GONIOMETER Fine-phi SLICING
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Research on Data Privacy Protection Algorithm with Homomorphism Mechanism Based on Redundant Slice Technology in Wireless Sensor Networks 被引量:6
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作者 Peng Li Chao Xu +2 位作者 He Xu Lu Dong Ruchuan Wang 《China Communications》 SCIE CSCD 2019年第5期158-170,共13页
Wireless transmission method in wireless sensor networks has put forward higher requirements for private protection technology. According to the packet loss problem of private protection algorithm based on slice techn... Wireless transmission method in wireless sensor networks has put forward higher requirements for private protection technology. According to the packet loss problem of private protection algorithm based on slice technology, this paper proposes the data private protection algorithm with redundancy mechanism, which ensures privacy by privacy homomorphism mechanism and guarantees redundancy by carrying hidden data. Moreover,it selects the routing tree generated by CTP(Collection Tree Protocol) as routing path for data transmission. By dividing at the source node, it adds the hidden information and also the privacy homomorphism. At the same time,the information feedback tree is established between the destination node and the source node. In addition, the destination node immediately sends the packet loss information and the encryption key via the information feedback tree to the source node. As a result,it improves the reliability and privacy of data transmission and ensures the data redundancy. 展开更多
关键词 wireless sensor network PRIVACY PROTECTION slice TECHNOLOGY PRIVACY HOMOMORPHISM collection tree protocol
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Subsidence control method by inversely-inclined slicing and upward mining for ultra-thick steep seams 被引量:4
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作者 Huayang Dai Peng Li +6 位作者 Nurpeissova Marzhan Yueguan Yan Chongliang Yuan Tursbekov Serik Junting Guo Yryszhan Zhakypbek Konbay Seituly 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2022年第1期103-112,共10页
Ultra-thick steep coal seam mining will inevitably lead to the increase of greater and violent ground subsidence and deformation.A subsidence control method by inversely-inclined slicing and upward mining is proposed ... Ultra-thick steep coal seam mining will inevitably lead to the increase of greater and violent ground subsidence and deformation.A subsidence control method by inversely-inclined slicing and upward mining is proposed in this paper.By this method,the sequence of collapse of overlying strata and the direction of propagation of strata movement are changed,the extent of roof-side deformation thereby is lessened,and boundary angle of roof-side subsidence is reduced by 5°-10°.The mechanism of this mining method for control of strata movement has been evidenced by numerical simulation and experiments with similarity materials.A subsidence prediction model based on the variation of mining influence propagation angle can be used to evaluate the surface movement and deformation of the mining method.The application of the method in No.3 Mine in Yaojie mining area has yielded the expected result. 展开更多
关键词 Ultra-thick steep coal seam Horizontal slicing Subsidence control method Inversely-inclined slicing and upward MINING Application study
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Incentive Scheme for Slice Cooperation Based on D2D Communication in 5G Networks 被引量:5
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作者 Qian Sun Lin Tian +2 位作者 Yiqing Zhou Jinglin Shi Zongshuai Zhang 《China Communications》 SCIE CSCD 2020年第1期28-41,共14页
In the 5th generation(5G)wireless communication networks,network slicing emerges where network operators(NPs)form isolated logical slices by the same cellular network infrastructure and spectrum resource.In coverage r... In the 5th generation(5G)wireless communication networks,network slicing emerges where network operators(NPs)form isolated logical slices by the same cellular network infrastructure and spectrum resource.In coverage regions of access points(APs)shared by slices,device to device(D2D)communication can occur among different slices,i.e.,one device acts as D2D relay for another device serving by a different slice,which is defined as slice cooperation in this paper.Since selfish slices will not help other slices by cooperation voluntarily and unconditionally,this paper designs a novel resource allocation scheme to stimulate slice cooperation.The main idea is to encourage slice to perform cooperation for other slices by rewarding it with higher throughput.The proposed incentive scheme for slice cooperation is formulated by an optimal problem,where cooperative activities are introduced to the objective function.Since optimal solutions of the formulated problem are long term statistics,though can be obtained,a practical online slice scheduling algorithm is designed,which can obtain optimal solutions of the formulated maximal problem.Lastly,the throughput isolation indexes are defined to evaluate isolation performance of slice.According to simulation results,the proposed incentive scheme for slice cooperation can stimulate slice cooperation effectively,and the isolation of slice is also simulated and discussed. 展开更多
关键词 slice cooperation incentive cooperation resource allocation for slice slice scheduling wireless communication networks
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TSLV:Time-Slice-Based Location Verification for VANET 被引量:3
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作者 薛小平 刘名扬 +1 位作者 林铌忠 张越好 《China Communications》 SCIE CSCD 2011年第5期130-143,共14页
Position-spoofing-based attacks seriously threaten the security of Vehicular Ad Hoc Network(VANET).An effective solution to detect position spoofing is location verification.However,since vehicles move fast and the to... Position-spoofing-based attacks seriously threaten the security of Vehicular Ad Hoc Network(VANET).An effective solution to detect position spoofing is location verification.However,since vehicles move fast and the topology changes quickly in VANET,the static location verification method in Wireless Sensor Network(WSN) is not suitable for VANET.Taking into account the dynamic changing topology of VANET and collusion,we propose a Time-Slice-based Location Verification scheme,named TSLV,to resist position spoofing in VANET.Specifically,TSLV transforms the dynamic topology into static topology by time slice and each time slice corresponds to a verification process.The verifier can implement location verification for the corresponding prover.During the verification process,the verifier first filters out vehicles which provide unreasonably claimed locations,and then uses the Mean Square Error(MSE)-based cluster approach to separate the consistent vehicles by time slice,and uses the consistent set for its verification.In addition,security analysis and simulation show that TSLV can defend against the collusion attack effectively. 展开更多
关键词 LOCATION verification position SPOOFING TIME slice RSS-based DISTANCE detection
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Wigner-Hough transform based on slice's entropy and its application to multi-LFM signal detection 被引量:6
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作者 Hongwei Wang Xiangyu Fan +1 位作者 You Chen Yuanzhi Yang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2017年第4期634-642,共9页
To enhance the capacity of the radar-reconnaissance interception receiver recognizing linear frequency modulated (LFM) at a low signal-noise ratio, this paper presents WignerHough transform (WHT) of the LFM signal and... To enhance the capacity of the radar-reconnaissance interception receiver recognizing linear frequency modulated (LFM) at a low signal-noise ratio, this paper presents WignerHough transform (WHT) of the LFM signal and its corresponding characteristics, derives the probability density functions of the LFM signal and Gaussian white noise within WHT based on entropy (WHTE), dimension under different assumptions and puts forward a WHT algorithm based on entropy of slice to improve the capacity of detecting the LFM signal. Entropy of the WHT domain slice is adopted to assess the information size of polar radius or angle slice, which is converted into the weight factor to weight every slice. Double-deck weight is used to weaken the influences of noise and disturbance terms and WHTE treatment and signal detection procedure are also summarized. The rationality of the algorithm is demonstrated through theoretical analysis and formula derivation, the efficiency of the algorithm is verified by simulation comparison between WHT, fractional Fourier transform and periodic WHT, and it is highlighted that the WHTE algorithm has better detection accuracy and range of application against strong noise background. 展开更多
关键词 low signal-to-noise ratio linear frequency modulated signal probability density function Wigner-Hough transform (WHT) signal detection entropy of slice
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