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A Memory Efficient Belief Propagation Decoder for Polar Codes

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China Communications 2015年第5期12卷 34-41页

作者： SHA Jin LIU xing WANG Zhongfeng ZENG xiaoyang School of Electronic Science and Engineering Nanjing University Broadcom Corp. State Key Laboratory of ASIC & System Fudan University

Polar codes have become increasingly popular recently because of their capacity achieving *** this paper,a memory efficient stage-combined belief propagation(BP) decoder design for polar codes is ***,we briefly reviewed the conventional BP decoding *** a stage-combined BP decoding algorithm which combines two adjacent stages into one stage and the corresponding belief message updating rules are *** on this stage-combined decoding algorithm,a memory-efficient polar BP decoder is *** demonstrated decoder design achieves 50%memory and decoding latency reduction in the cost of some combinational logic complexity *** proposed decoder is synthesized under TSMC 45 nm Low Power CMOS *** achieves 0.96 Gb/s throughput with 14.2mm^2 area when code length N=2^(16)which reduces 51.5%decoder area compared with the conventional decoder design.

关键词： polar codes belief propagation stage-combined memory-efficient implementation

Impact of H_(2)S on Hg^(0)capture performance over nitrogen-doped carbon microsphere sorbent:experimental and theoretical insights

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Frontiers of Chemical Science and Engineering 2024年第3期18卷 89-100页

作者： Guopei Zhang xiaoyang Zhang Xiangwen xing Xiangru Kong Lin Cui Dong Yong National Engineering Laboratory for Reducing Emissions from Coal Combustion Shandong UniversityJinan250061China Bingtuan Energy Development Institute Shihezi UniversityShihezi832000China

A nitrogen-doped carbon microsphere sorbent with a hierarchical porous structure was synthesized via aggregation-hydrothermal *** Hg^(0)adsorption performance of the nitrogen-doped carbon microsphere sorbent was tested and compared with that of the coconut shell activated carbon prepared in the *** effect of H_(2)S on Hg^(0)adsorption was also *** nitrogen-doped carbon microsphere sorbent exhibited superior mercury removal performance compared with that of coconut shell activated *** the absence of H_(2)S at a low temperature(≤100℃),the Hg^(0)removal efficiency of the nitrogen-doped carbon microsphere sorbent exceeded 90%.This value is significantly higher than that of coconut shell activated carbon,which is approximately 45%.H_(2)S significantly enhanced the Hg^(0)removal performance of the nitrogen-doped carbon microsphere sorbent at higher temperatures(100–180℃).The hierarchical porous structure facilitated the diffusion and adsorption of H_(2)S and Hg^(0),while the nitrogen-containing active sites significantly improved the adsorption and dissociation capabilities of H_(2)S,contributing to the generation of more active sulfur species on the surface of the nitrogen-doped carbon microsphere *** formation of active sulfur species and HgS on the sorbent surface was further confirmed using X-ray photoelectron spectroscopy and Hg^(0)temperature-programmed desorption *** functional theory was employed to elucidate the adsorption and transformation of Hg^(0)on the sorbent surface.H_(2)S adsorbed and dissociated on the sorbent surface,generating active sulfur species that reacted with gaseous Hg^(0)to form HgS.

关键词： nitrogen-doped carbon microsphere H_(2)S Hg^(0)removal adsorption mechanism

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基于高光谱图像技术的罂粟种子活性无损检测

种子 2024年第4期43卷 141-146页

作者：陈云霞张若妍田智中谢嘉华梁善咨涂嘉宜汪希伟邢晓阳南京警察学院刑事科学技术学院南京210023 南京警察学院/野生动植物物证技术国家林业和草原局重点实验室南京210023 南京林业大学南京210037

罂粟种子是否具有活性是打击非法持有毒品原植物种子等相关犯罪的主要法庭证据。为实现罂粟种子活性的快速无损检测,本研究首次采用高光谱图像技术结合种子发芽率建立罂粟种子活性的预测模型,分别采用偏最小二乘回归法(PLSR)、支持向量... 详细信息

罂粟种子是否具有活性是打击非法持有毒品原植物种子等相关犯罪的主要法庭证据。为实现罂粟种子活性的快速无损检测,本研究首次采用高光谱图像技术结合种子发芽率建立罂粟种子活性的预测模型,分别采用偏最小二乘回归法(PLSR)、支持向量回归法(SVR)和极限学习机法(ELM)建立预测模型。结果表明,全波段预测时,采用ELM建立的预测模型性能最佳,R_(p)为0.9204;在使用特征波段光谱数据建立预测模型时,相较于全波段模型,在模型性能上均有所提升,其中采用ELM在连续投影算法(SPA)选取的特征波段建立的预测模型的性能最佳,R_(p)为0.9285。表明采用高光谱图像技术检测罂粟种子活性的方法可行,该方法可以无损、快速地检测罂粟种子活性,为打击非法种植毒品原植物的相关犯罪活动提供技术支持。

关键词：罂粟种子活性高光谱成像无损检测预测模型

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硅晶切割砂绿色再生工艺装备的运行特性研究

再生资源与循环经济 2013年第7期6卷 33-36页

作者：周先桃蔡俊吴锦毅万旭辉邢晓阳华东理工大学化工机械研究所上海200237

针对硅晶切割过程中产生的切割废砂浆的资源化回收问题,建立了每小时处理1 t废砂饼的绿色再生工艺装备。通过工业试运行,实现了水资源的循环利用,回收的硅晶切割砂纯度达到97%,6~11μm粒径切割砂的集中度大于78%,6μm以上的切割砂全部... 详细信息

针对硅晶切割过程中产生的切割废砂浆的资源化回收问题,建立了每小时处理1 t废砂饼的绿色再生工艺装备。通过工业试运行,实现了水资源的循环利用,回收的硅晶切割砂纯度达到97%,6~11μm粒径切割砂的集中度大于78%,6μm以上的切割砂全部实现了回收。该工艺过程不消耗酸碱,节约了化学资源的消耗,从源头上消除了废酸、废碱的污染,是回收硅晶切割砂的一种理想工艺装备。

关键词：硅晶切割砂零排放绿色再生工艺洗涤过程封闭循环

Study on the temperature characteristic and high temperature risk of asphalt layer of Beijing-Xinjiang ExpresswayWutong Daquan to Yiwu Section

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Research in Cold and Arid Regions 2022年第3期14卷 173-181页

作者： xing Long xiaoyang Yu Kai Jing Liang Sun ZhiYun Liu China Railway Construction Investment Group Co.Ltd. UrumqiXinjiang 830017China College of Geology Engineering and Geomatics Chang'an UniversityXi'anShaanxi 710054China

High temperature rutting is a typical highway damage in Xinjiang, China, and its trigger process usually has a close relationship with characteristics of road temperature distribution. A numerical model of earth-atmosphere coupling heat transfer on a typical section of the Beijing-Xinjiang Expressway(G7) from Wutong Daquan to Yiwu was established in this work. Spatiotemporal characteristics of pavement structure layer temperature distribution, frequency and duration times of road surface high temperature from May 1 to September 30 are statistically studied. The effects of wind speed, weather and air temperature on asphalt layer and pavement temperature are analyzed. The results show that:(1) Spatial and temporal temperature distribution characteristics of pavement structural layers are greatly affected by the coupled earth-atmosphere heat transfer process. Surface temperature increases along the airflow direction and daily temperature variation of the pavement structure layer decreases with an increase of depth.(2) G7 expressway will face the challenge of high rutting damage. The proportion of temperature higher than 50 ℃ for pavement surface and asphalt upper layer both exceeds 50%and high temperature of road lasts for more than six hours in numerous days.(3) High temperatures of asphalt pavement are usually associated with low ambient wind speeds, while the wind flow has little cooling effect when the road surface temperature is relative high. Weather conditions have a significant impact on temperature of the road surface. The probability of high temperature in sunny days is obviously higher than other weather conditions.(4) Pavement temperature rises as air temperature rises. When air temperature is higher than 30 °C, the proportion of pavement daily maximum temperature over softening point reaches up to 78%.

关键词： Beijing-Xinjiang Expressway asphalt surface temperature distribution characteristics high temperature risk earth-atmosphere coupling numerical model

Application of Geoid Anomalies to the Tectonic Research in the East Asian Continental Margin

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Journal of Ocean University of China 2018年第4期17卷 811-822页

作者： WU xiaoyang xing Junhui LI Chaoyang LIU Xinzhe YANG Kai CHEN Hongyan GONG Wei College of Marine Geosciences Ocean University of China Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of Education Evaluation and Detection Technology Laboratory of Marine Mineral Resources Qingdao National Laboratory for Marine Science and Technology

In this paper, we calculated multi-scale residual geoid anomalies with the method of geoid separation processing, according to EGM2008 ultra-high order gravity field model, remove-restore technique and Stokes integral. The East Asian continental margin was selected as the study area. The residual geoid anomalies have been calculated by programming. On the basis of residual geoid anomalies at various orders, the interlayer geoid anomalies at different depths were calculated to depict the spatial distribution characteristics of the residual geoid. Finally, we conducted a detailed geophysical interpretation for the study area according to the geoid anomalies in combination with other geophysical datasets. Four conclusions can be outlined as follows: 1) it is impracticable that geoid anomalies are used in the interpretation of the shallow objects due to the influence of the terrain; 2) the anomalies of residual geoid can reflect the intensity of small-scale mantle convection in the asthenosphere; 3) the interlayer geoid anomalies can reflect the magmatic activities associated with the mantle convection and mantle plume in different scales; 4) the study of the geoid may provide an approach for the research of the subduction zone, mantle convection and mantle plume.

关键词： EGM2008 gravity field model geoid anomalies the East Asian continental margin structural interpretations

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细菌超广谱β-内酰胺酶提取方法研究进展

中国微生态学杂志 2017年第8期29卷 953-957页

作者：宋峰亮田晔马慧慧姚传福邢晓阳沈竹斌刘宏伟孔彦龙安徽理工大学医学院病原生物学教研室安徽淮南232001

超广谱β-内酰胺酶(ESBLs)可水解β-内酰胺类抗生素,使产ESBLs细菌对目前常用的头孢菌素和青霉素类等抗生素产生多耐药性和高耐药性,由此使得产ESBLs细菌感染的诊断和治疗成为临床抗感染诊疗工作的重点。目前细菌的ESBLs提取主要包括超... 详细信息

超广谱β-内酰胺酶(ESBLs)可水解β-内酰胺类抗生素,使产ESBLs细菌对目前常用的头孢菌素和青霉素类等抗生素产生多耐药性和高耐药性,由此使得产ESBLs细菌感染的诊断和治疗成为临床抗感染诊疗工作的重点。目前细菌的ESBLs提取主要包括超声波破碎法、溶菌酶法和反复冻融法等。本文对现有文献中此三种方法的提取原理、提取步骤和影响因素进行了综述,同时对各种提取方法的优缺点进行了分析比较,并对采用反复冻融法联合超声法和溶菌酶法联合超声法等联合提取法提高酶提取效率的展望予以了简要分析,以期为产酶多重耐药菌的控制提供参考。

关键词：超广谱β-内酰胺酶酶提取研究进展

Piceatannol enhances Beclin-1 activity to suppress tumor progression and its combination therapy strategy with everolimus in gastric cancer

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Science China(Life Sciences) 2023年第2期66卷 298-312页

作者： Longtao Huangfu xiaoyang Wang Shanshan Tian Junbing Chen Xueying Wang Biao Fan Qian Yao Gangjian Wang Cong Chen Jing Han Xiaofang xing Jiafu Ji Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education) Division of Gastrointestinal Cancer Translational Research LaboratoryPeking University Cancer Hospital&InstituteBeijing 100142China Department of Pharmacy Peking University Cancer Hospital&InstituteBeijing 100142China National Institute on Drug Dependence Peking UniversityBeijing 100191China Gastrointestinal Cancer Center Peking University Cancer Hospital&InstituteBeijing 100142China Department of Pathology Peking University Cancer Hospital&InstituteBeijing 100142China

The effects and regulation of Beclin-1-an autophagy-related protein-have not been fully defined, however, a negative correlation has been reported between Beclin-1 expression and carcinogenesis. Meanwhile, no compound has been shown to directly inhibit its activity. Here, we evaluate piceatannol, a naturally occurring polyphenolic compound, as a potential targeting agonist of Beclin-1, to assess its efficacy as an antitumor agent against gastric cancer. More specifically, we determine the effects of piceatannol treatment on cell viability using a monitoring system and colony forming assay. Piceatannol was found to efficiently inhibit the proliferation of several human gastric cancer cell lines. Autophagic flux is increased by piceatannol treatment, and correlates with inhibition of cell proliferation and colony formation. Additionally, microscale thermophoresis and surface plasmon resonance results show a direct interaction between piceatannol and Beclin-1, which reduces the phosphorylation activity of Beclin-1 at the Ser-295 site. Notably, piceatannol impairs the binding of Beclin-1 to Bcl-2 and enhances the recruitment of binding of UV radiation resistance-associated gene protein, which further triggers Beclin-1-dependent autophagy signaling. An increase in autophagic activity via treatment with the mTOR inhibitor, everolimus, effectively sensitizes piceatannol-induced antitumor effects. Xenograft models confirmed that piceatannol inhibits tumor development and elicits a potent synergistic effect with everolimus in vivo. Taken together, the findings of this study strongly support the application of combinatorial piceatannol and everolimus therapy in future clinical trials for gastric cancer patients.

关键词： piceatannol Beclin-1 autophagy everolimus gastric cancer drug synergy

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激光输能无人机的概念研究

航空学报 2013年第9期34卷 2074-2080页

作者：金星常浩崔晓阳装备学院激光推进及其应用国家重点实验室北京101416 装备学院研究生院北京101416

激光输能无人机(UAV)由于飞行高度高和续航时间长等优势得到关注。从激光输能角度,基于无人机质量评估模型,建立了激光辐照功率密度和无人机输出功率以及飞行性能之间的函数关系。以Sky Sailor太阳能无人机为例,计算分析了激光输能无人... 详细信息

激光输能无人机(UAV)由于飞行高度高和续航时间长等优势得到关注。从激光输能角度,基于无人机质量评估模型,建立了激光辐照功率密度和无人机输出功率以及飞行性能之间的函数关系。以Sky Sailor太阳能无人机为例,计算分析了激光输能无人机和太阳能无人机的升限和飞行包络。结果表明由于激光辐照功率密度大和光/电之间能量转化效率高,与太阳能无人机比较,可携带的有效载荷更大、升限更高、爬升和抗扰能力更强;随着激光辐照功率密度增大,即使电子设备和有效载荷的质量和功耗都增大,飞行包络很宽,同时,飞行速度增大,但实际升限有所降低。

关键词：无人机激光输能太阳能飞行包络升限