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Interference Robust Channel Hopping Strategies for Wireless Sensor Networks

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China Communications 2016年第3期13卷 96-104页

作者： LIU Ye JIANG Fulong LIU Hao WU jianhui HU chen ZHANG Meng National ASIC System Engineering Research Center Southeast University Suzhou Key Laboratory of Integrated Circuits and Systems Southeast University

Due to the shared nature of the wireless medium, the performance of wireless sensor network is often limited by both internal interference and external interference. The internal interference is that simultaneous traffic activity by neighboring nodes in the same network, while the external interference is from wireless transmissions by other types of devices, such as Wi-Fi and Bluetooth nodes. In this paper, we present two channel hopping algorithms for multichannel, single-radio wireless sensor networks. The first algorithm achieves collision-free transmission environment while do not introduce extra control overhead. The second algorithm, in addition to reducing internal interference effects, reduces the external interference effects from Wi-Fi devices. Simulation results show that both of them significantly improve performance in wireless sensor network.

关键词：无线传感器网络网络干扰 Wi-Fi设备跳跃信道鲁棒外部干扰内部干扰

Petroleum Migration Characteristics in the Northeastern Part of the Baiyun Depression,Pearl River Mouth Basin,South China Sea

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Acta Geologica Sinica(English Edition) 2021年第1期95卷 208-231页

作者： ZENG jianhui WANG chen GUO Shuai YU Yixin ZHANG Zhongtao YANG Haizhang ZHAO Zhao SUN Rui State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing 102249China College of Geosciences China University of Petroleum(Beijing)Beijing 102249China State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi'an 710069China CNOOC Research Institute Co. Ltd.Beijing 100028China Shenzhen Branch of China National Offshore Oil Corporation Ltd. ShenzhenGuangdong 518054China

This paper investigates the origin and migration characteristics of petroleum in the northeastern part of the Baiyun Depression,Pearl River Mouth Basin(PRMB).The discovered petroleum in the study area is mainly located in the Lower Zhujiang Member(N_(1)z^(2))and mainly originated from the Enping Formation source rocks in the eastern sag.Active faults(vertical migration)and N_(1)z^(2)sandstones(lateral migration)acted as the petroleum migration systems.The fault activities in the Dongsha event controlled the episodic petroleum migration.Fractures in the fault zones provided effective conduits,and overpressure was the driving force.The vertical migration could not cross the fault zones laterally.The petroleum injection areas in the carrier beds were the contact zones of petroleum-migration faults and carrier beds.The lateral migration was steady-state migration,and buoyancy was the driving force.The migration pathways in the carrier beds were controlled by the structural morphology.Secondary petroleum migration in the study area could be divided into two parts:vertical migration along the fractures in the fault zones and lateral migration through preferential petroleum migration pathways(PPMPs)in the carrier beds.The petroleum migration behaviors,including migrating direction,driving force,and migration pattern,in the faults and sandstone carrier beds were quite different.This study provides a typical example for comprehending secondary migration processes and has great importance for determining future exploration targets in the deep-water area of the PRMB.

关键词： secondary petroleum migration episodic petroleum migration preferential petroleum migration pathways(PPMPs) Baiyun Depression Pearl River Mouth Basin

Development Status and Prospects of the Natural Gas Industry in China

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China Oil & Gas 2018年第2期25卷 49-56页

作者： Gao Jie Li Qiang chen jianhui PetroChina Planning & Engineering Institute PetroChina Pipeline Company Petro China Natural Gas & Pipeline Company

The year 2017 saw explosive growth in China's natural gas market, and the apparent consumption was 235.7 billion cubic meters, up 18.2% over the same period of 2016. In 2017, China's domestic production growth picked up significantly, reaching 145.3 billion cubic meters, an increase of 9%.Natural gas imports grew rapidly, and imported pipeline gas and imported LNG totaled 91.6 billion cubic meters. The trade volume of LNG surpassed that of pipeline gas for the first time since 2012. In 2018, the macro-economy is expected to maintain growth at a moderate-to-high rate. However, driven by favorable factors such as environmental policies, China's demand for natural gas is expected to continue to grow rapidly, and natural gas consumption will maintain double-digit growth, roughly at 12%. Nevertheless, the seasonable imbalance between natural gas supply and demand will remain conspicuous.

关键词：天然气工业中国天然气消费天然气市场天然气供应环境政策 LNG 生长

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灭火救援过程中固定灭火设施应用初探

今日消防 2023年第10期8卷 26-28页

作者：陈剑辉上海市杨浦区消防救援支队指挥中心上海200093

对固定灭火设施的类型进行了研究,分析了不同类型固定灭火设施的功能作用以及实际应用效果,同时也明确了这些固定灭火设施的应用范围,并结合具体的火灾事故情况,提出不同固定灭火设施的具体应用措施,确保这些设施的实际效用能够充分发... 详细信息

对固定灭火设施的类型进行了研究,分析了不同类型固定灭火设施的功能作用以及实际应用效果,同时也明确了这些固定灭火设施的应用范围,并结合具体的火灾事故情况,提出不同固定灭火设施的具体应用措施,确保这些设施的实际效用能够充分发挥出来。

关键词：灭火救援固定灭火设施应用分析

On the timing of the East Asian summer monsoon maximum during the Holocene—Does the speleothem oxygen isotope record reflect monsoon rainfall variability?

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Science China Earth Sciences 2016年第12期59卷 2328-2338页

作者： chen jianhui RAO ZhiGuo LIU JianBao HUANG Wei FENG Song DONG GuangHui HU Yu XU QingHai chen FaHu Key Laboratory of West China s Environmental System(Ministry of Education) College of Earth and Environmental SciencesLanzhou University Department of Geosciences University of Arkansas Institute of Nihewan Archaeology Research Hebei Normal University

The evolution of the East Asian summer monsoon(EASM) during the Holocene has long been of significant interest.Knowledge of past EASM variability not only increases our understanding of monsoon dynamics on a long timescale,but it also provides an environmental and climatic background for research into Chinese cultural development.However,the timing of the EASM maximum remains controversial.The popular concept of an "early Holocene maximum" is mainly based on speleothemδ18O(δ18Oc) records from caves in southern China;however,the interpretation of δ18OCas a reliable proxy for EASM intensity is being increasingly challenged.The present paper is a critical review of the climatic significance of the δ18OCrecord from China.Firstly,we suggest that precipitation in northern China is an appropriate index of EASM intensity,the variation of which clearly indicates a mid-Holocene monsoon maximum.Secondly,an interregional comparison demonstrates that the precipitation record in northern China is quite different from that in southern China on a range of timescales,and is inconsistent with the spatial similarity exhibited by speleothem oxygen isotope records.Furthermore,both modeling and observational data show that the δ18OCrecords from southern China indeed reflect changes in precipitation δ18O(δ18OP) rather than precipitation amount,and therefore that their use as an EASM proxy is inappropriate.Finally,we address several significant monsoon-related issues-including the driving mechanism of the EASM on an orbital timescale,the climatic significance of speleothem oxygen isotopes,and the relationship between atmospheric circulation and precipitation in monsoonal regions.

关键词： East Asian summer monsoon Holocene Speleothem oxygen isotopes

In-situ encapsulation ofα-Fe_(2)O_(3) nanoparticles into ZnFe_(2)O_(4) micro-sized capsules as high-performance lithium-ion battery anodes

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Journal of Materials Science & Technology 2021年第16期75卷 110-117页

作者： Wei Wu Yongshan Wei Hongjiang chen Keyan Wei Zhitong Li jianhui He Libo Deng Lei Yao Haitao Yang Shenzhen Key Laboratory of Special Functional Materials Shenzhen Engineering Laboratory for Advanced Technology of CeramicsGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

Transition metal oxides as anode materials for high-performance lithium-ion batteries suffer from severe capacity decay,originating primarily from particle pulverization upon volume expansion/shrinkage and the intrinsically sluggish electron/ion transport.Herein,in-situ encapsulation ofα-Fe_(2)O_(3) nanoparticles into micro-sized ZnFe_(2)O_(4) capsules is facilely fulfilled through a co-precipitation process and followed by heat-treatment at optimal calcination temperature.The porous ZnFe_(2)O_(4) scaffold affords a synergistic confinement effect to suppress the grain growth ofα-Fe2 O3 nanocrystals during the calcination process and to accommodate the stress generated by volume expansion during the charge/discharge process,leading to an enhanced interfacial conductivity and inhibit electrode pulverization and mechanical failure in the active material.With these merits,the preparedα-Fe_(2)O_(3)/Fe_(2)O_(4) composite delivers prolonged cycling stability and improved rate capability with a higher specific capacity than soleα-Fe_(2)O_(3) and Fe_(2)O_(4).The discharge capacity is retained at 700 mAh g-1 after 500 cycles at 200 mA g^(-1) and 940 mAh g^(-1) after 50 cycles at 100 m A g^(-1).This work provides a new perspective in designing transition metal oxides for advanced lithium-ion batteries with superior electrochemical properties.

关键词： α-Fe_(2)O_(3)/ZnFe_(2)O_(4)ceramic composite Co-precipitation process Confinement effect Interfacial effect Grain growth High conductivity Lithium-ion battery anodes

建筑工程中概念设计与结构构造措施的应用浅析

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房地产世界 2022年第13期 67-68,71页

作者：陈建辉安徽省建筑设计研究总院股份有限公司

随着我国建筑工程的多样化发展,人们对建筑工程的稳定性提出了越来越高的要求。传统设计技术显然已无法满足当前建筑工程的设计需求,此时,积极引进和应用概念设计与结构构造措施才是建筑企业发展的新出路。基于此,本文对建筑工程中的概... 详细信息

随着我国建筑工程的多样化发展,人们对建筑工程的稳定性提出了越来越高的要求。传统设计技术显然已无法满足当前建筑工程的设计需求,此时,积极引进和应用概念设计与结构构造措施才是建筑企业发展的新出路。基于此,本文对建筑工程中的概念设计和结构构造措施展开论述,旨在为建筑企业进一步优化建筑工程的整体质量提供方向。

关键词：建筑工程概念设计结构构造措施

腹横肌平面阻滞联合氢吗啡酮对腹腔镜结直肠癌手术患者应激反应及术后镇痛的影响

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临床麻醉学杂志 2022年第10期38卷 1025-1030页

作者：陈蔚陈俊杰孔建辉南通大学附属医院麻醉科 226001 江苏省如东县人民医院麻醉科

目的探讨腹横肌平面阻滞(TAPB)联合氢吗啡酮静脉用药对腹腔镜结直肠癌根治术患者应激反应及术后镇痛的影响。方法选择择期全身麻醉下行腹腔镜结直肠癌根治术的患者119例,男43例,女76例,年龄40~64岁,BMI<28 kg/m^(2),ASAⅡ或Ⅲ级。采用... 详细信息

目的探讨腹横肌平面阻滞(TAPB)联合氢吗啡酮静脉用药对腹腔镜结直肠癌根治术患者应激反应及术后镇痛的影响。方法选择择期全身麻醉下行腹腔镜结直肠癌根治术的患者119例,男43例,女76例,年龄40~64岁,BMI<28 kg/m^(2),ASAⅡ或Ⅲ级。采用随机数字表法将患者分为四组:TAPB组(T组,n=29)、氢吗啡酮静脉用药组(H组,n=31)、TAPB联合氢吗啡酮静脉用药组(TH组,n=30)和对照组(C组,n=29)。记录诱导前10 min和拔管后5 min的血浆肾上腺素(E)和去甲肾上腺素(NE)浓度。记录术中丙泊酚、瑞芬太尼、阿托品、去氧肾上腺素、艾司洛尔、乌拉地尔的使用情况。记录拔管后5 min、1、6、12 h的VAS疼痛评分和Ricker镇静-躁动评分(SAS)。记录术后24 h内镇痛泵有效按压次数、舒芬太尼用量、补救镇痛例数。记录拔管后24 h内恶心呕吐、低血压、呼吸抑制、皮肤瘙痒等不良反应的发生情况。结果与诱导前10 min比较,拔管后5 min四组血浆E和NE浓度明显升高(P<0.05)。与C组比较,拔管后5 min,T组、H组和TH组血浆E、NE浓度明显降低(P<0.05)。与TH组比较,T组和H组血浆E、NE浓度明显升高(P<0.05)。与C组比较,拔管后5 min、1、6 h,T组和TH组VAS疼痛评分和SAS评分明显降低(P<0.05)。与TH组比较,拔管后5 min、1、6 h,T组和H组VAS疼痛评分明显增加(P<0.05)。与C组比较,T组、H组和TH组术中丙泊酚和瑞芬太尼用量、去氧肾上腺素使用比例、镇痛泵有效按压次数及舒芬太尼用量明显减少,补救镇痛比例明显降低(P<0.05)。与TH组比较,T组和H组术中丙泊酚和瑞芬太尼用量、去氧肾上腺素使用比例、镇痛泵有效按压次数及舒芬太尼用量明显增加(P<0.05)。四组拔管后24 h内恶心呕吐、呼吸抑制、皮肤瘙痒、便秘等不良反应发生率差异无统计学意义。结论与单用腹横肌平面阻滞或氢吗啡酮静脉用药相比,两者联合使用能够减轻腹腔镜结直肠癌根治术患者的应激反应,提供更好的术后早期镇痛效果。

关键词：腹横肌平面阻滞氢吗啡酮腹腔镜应激反应术后镇痛

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减孔腹腔镜下经自然腔道取出直肠癌根治术

消化肿瘤杂志（电子版） 2022年第1期14卷 104-106页

作者：陈剑辉中山大学附属第一医院胃肠外科中心