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音频技术在禽畜养殖与果蔬种植中的应用研究进展

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农业工程学报 2024年第7期40卷 34-49页

作者：李文伟郑永军杨圣慧江世界赵航行王慧苏道毕力格谭彧中国农业大学工学院北京100083 智能农业动力装备全国重点实验室北京100083 现代农业装备与设施教育部工程研究中心北京100083

随着信息技术的发展,音频技术凭借其快速、准确、成本低,且非接触、无侵入的优点,被广泛应用于现代农业禽畜养殖与果蔬种植等领域,已成为推动农业数字化、智能化的关键技术之一。该文阐述了音频增强技术如传统滤波法、短时谱估计法和小... 详细信息

随着信息技术的发展,音频技术凭借其快速、准确、成本低,且非接触、无侵入的优点,被广泛应用于现代农业禽畜养殖与果蔬种植等领域,已成为推动农业数字化、智能化的关键技术之一。该文阐述了音频增强技术如传统滤波法、短时谱估计法和小波去噪法在禽畜果植中的研究与应用,综述了音频识别技术在农产品无损检测、动物疾病与健康监测、物种识别与病虫害检测等方面的研究成果,同时分析了音频控制技术在果蔬种植和禽畜养殖中的研究进展,在此基础上总结了现阶段禽畜果植音频增强技术、音频识别技术与音频控制技术面临的问题,并指出其未来可能的研究发展方向,以期为禽畜养殖与果蔬种植领域音频技术的研究与应用提供参考。

关键词：禽畜养殖果蔬种植音频增强音频识别音频控制

鄱阳湖候鸟栖息地微塑料表面细菌群落结构特征与生态风险预测

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环境科学 2024年第5期45卷 3098-3106页

作者：俞锦丽赵俊凯罗思琦朱颖婷张文慧胡启武刘淑丽江西师范大学地理与环境学院南昌330022 江西师范大学鄱阳湖湿地与流域研究教育部重点实验室南昌330022 江西师范大学生命科学学院生物多样性保护与资源利用江西省重点实验室南昌330022

近年来鄱阳湖的微塑料环境污染日益受到关注.选取鄱阳湖白沙湖为研究区,采集白沙湖水体和沉积物以及其中的微塑料样品,通过傅里叶红外光谱确定微塑料的聚合物类型为聚乙烯(PE)、聚酯纤维(PET)、聚丙烯(PP)和聚苯乙烯(PS).并利用16S高通... 详细信息

近年来鄱阳湖的微塑料环境污染日益受到关注.选取鄱阳湖白沙湖为研究区,采集白沙湖水体和沉积物以及其中的微塑料样品,通过傅里叶红外光谱确定微塑料的聚合物类型为聚乙烯(PE)、聚酯纤维(PET)、聚丙烯(PP)和聚苯乙烯(PS).并利用16S高通量测序技术分析水体、沉积物中和微塑料表面细菌群落结构组成.微塑料表面细菌的物种丰富度与多样性均低于周围水体和沉积物.NMDS分析结果表明,微塑料表面与周围沉积物、水体中的细菌群落结构差异较大.水体和沉积物中的细菌群落组成与微塑料表面存在差异,门水平上沉积物与沉积物中微塑料表面优势菌门为变形菌门(Proteobacteria)和拟杆菌门(Bacteroidota),其在微塑料表面相对丰度高于沉积物;水体中微塑料表面变形菌门相对丰度高于水体,而拟杆菌门、放线菌门(Actinobacteriota)的相对丰度明显低于水体.属水平上马赛菌属(Massilia)和假单胞菌属(Pseudomonas)是微塑料表面的优势菌属,相对丰度明显高于周围水体和沉积物.通过BugBase表型预测发现微塑料细菌群落可移动基因元件含量、生物膜形成、潜在致病性及胁迫耐受等表型相对丰度明显高于周围水体和沉积物.结果发现微塑料可能会促使致病菌在内的有害菌的传播,提高细菌群落的潜在致病性,且微塑料表面细菌群落具有更高的可移动基因元件含量表型.通过揭示微塑料污染对微观层面湿地生态的潜在危害,可为维护湿地生态稳定性提供科学参考.

关键词：鄱阳湖细菌微塑料(MPs) BugBase 假单胞菌

基于里德堡原子电场传感的计量、通信以及混合量子系统

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Science Bulletin 2024年第10期69卷 1515-1535页

作者：张好马宇廖开宇杨文广刘宗凯丁冬生颜辉李文辉张临杰 State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230036China Key Laboratory of Atomic and Subatomic Structure and Quantum Control(Ministry of Education) Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of MatterSchool of PhysicsSouth China Normal UniversityGuangzhou 510006China Centre for Quantum Technologies National University of SingaporeSingapore 117543Singapore Hefei National Laboratory Hefei 230088China

Rydberg atoms-based electric field sensing has developed rapidly over the past decade.A variety of theoretical proposals and experiment configurations are suggested and realized to improve the measurement metrics,such as intensity sensitivity,bandwidth,phase,and *** Stark effect and electromagnetically induced transparency(EIT)or electromagnetically induced absorption(EIA)are fundamental physics principles behind the ***,various techniques such as amplitude-or frequency-modulation,optical homodyne read-out,microwave superheterodyne and frequency conversion based on multi-wave mixing in atoms are utilized to push the metrics into higher *** this review,different technologies and the corresponding metrics they had achieved were presented,hoping to inspire more possibilities in the improvement of metrics of Rydberg atom-based electric field sensing and broadness of application scenarios.

关键词： Rydberg atom Electric field sensing Atomic sensor

深层致密砂岩储层成岩演化对含气性的影响——以鄂尔多斯盆地西南部庆阳气田二叠系山1段为例

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石油与天然气地质 2024年第1期45卷 169-184页

作者：曹江骏王继平张道锋王龙李笑天李娅张园园夏辉于占海中国石油长庆油田分公司勘探开发研究院陕西西安710018 低渗透油气田勘探开发国家工程实验室陕西西安710018

为研究深层致密砂岩储层成岩作用特征,分析成岩演化对储层含气性的影响,通过铸体薄片、扫描电镜、物性、测井综合解释等资料,结合前人研究成果,对庆阳气田二叠系山西组1段(山1段)进行研究。研究结果表明:(1)庆阳气田山1段分流河道中部... 详细信息

为研究深层致密砂岩储层成岩作用特征,分析成岩演化对储层含气性的影响,通过铸体薄片、扫描电镜、物性、测井综合解释等资料,结合前人研究成果,对庆阳气田二叠系山西组1段(山1段)进行研究。研究结果表明:(1)庆阳气田山1段分流河道中部多期厚层砂岩具有连续沉积型和间隔沉积型两类叠置关系,前者孔隙组合类型以溶蚀孔+粒间孔+晶间微孔为主,后者以溶蚀孔+晶间微孔为主。相较于后者,前者填隙物含量更低、物性更好、含气性更好。(2)压实作用是影响山1段储层含气性最主要的破坏性成岩作用,连续沉积型与间隔沉积型砂岩储层压实率分别为55.4%与61.2%;溶蚀作用是影响储层含气性最主要的建设性成岩作用,二者溶蚀率分别为27.9%与19.7%。连续沉积型砂岩储层受中等压实作用—中等胶结作用—中等溶蚀作用的成岩演化影响,破坏性成岩作用较弱;间隔沉积型砂岩储层受中等-强压实作用—中等-弱胶结作用—中等-弱溶蚀作用的成岩演化影响,破坏性成岩作用较强。(3)研究区山1段储层以先致密后充注为主,受成岩演化影响,连续沉积型砂岩储层较间隔沉积型砂岩储层致密化程度低,天然气充注规模大,含气性好。(4)引入成岩综合指数定量判断山1段储层成岩作用强度。平面上,西部主河道以间隔沉积型砂岩为主,储层成岩综合指数较低,含气性较差;东部主河道以连续沉积型砂岩为主,储层成岩综合指数较高,含气性较好。含气储层主要发育在庆阳一线以东地区。

关键词：成岩演化含气性储层成岩综合指数深层致密砂岩山西组1段二叠系庆阳气田鄂尔多斯盆地

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Tailoring coercive field in rare earth giant magnetostrictive materials byα-Fe precipitation

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Rare Metals 2023年第2期42卷 606-613页

作者： Fang-Xian Zhang Peng-Qiang Hu Zheng-Ming Zhang jian-Hu Gong Dun-hui Wang Division of Microelectronic Materials and Devices Hangzhou Dianzi UniversityHangzhou310018China National Laboratory of Solid State Microstructures Nanjing UniversityNanjing210093China

Rare earth giant magnetostrictive materials(GMMs)Tb_(1-x)Dy_(x)Fe_(2±δ)(Tb-Dy-Fe)have been successfully employed in many microelectromechanical devices due to their excellent magnetostrictive properties at room ***,Tb-Dy-Fe still shows a relatively large coercivity with high hysteresis,which inevitably limits its application ***,micromagnetic simulations are performed to investigate the size effect of precipitated phase(α-Fe)on coercivity in *** results demonstrate that the coercivity is reduced from 31.46 to 12.48 mT with increasing the size ofα-Fe from 4 to 50 nm in Tb-Dy-Fe since the precipitated phase ofα-Fe can act as a magnetization reversal *** decreasing trend of coercivity can be well fitted with an inverse square relationship,which agrees well with the nucleation *** study highlights that the coercivity of Tb-Dy-Fe can be tailored by tuning the size ofα-Fe precipitation.

关键词： Giant magnetostrictive material(GMM) Precipitation Coercivity Micromagnetic simulation

Design of Customer Satisfaction Measurement Index System of EMS Service

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The Journal of China Universities of Posts and Telecommunications 2006年第1期13卷 109-113页

作者： LIU Hong-yu LI jian GE yun-xian Technical Section Shijiazhuang Post and Telecommunication Technical College Shijiazhuang 050021 P.R. China

This paper discusses the design of a customer satisfaction measurement index system of erpress mail service. It presents objectives and principles of the design based on hierarchical structures. We have devised a diagram for modeling customer satisfaction, and a detailed analysis of customer satisfaction is conducted. This paper presents our customer satisfaction model and analysis results.

关键词： postal service EMS customer satisfaction index system design hierarchical structure

Development of an ultra-high-pressure rotary combined dynamic seal and experimental study on its sealing performance in deep energy mining conditions

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Petroleum Science 2022年第3期19卷 1305-1321页

作者： Wei Huang Gan Feng hui-Lan He jian-Zhong Chen Jiu-Quan Wang Zhao Zhao Key Laboratory of Deep Earth Science and Engineering(Sichuan University) Ministry of EducationSichuan UniversityChengdu610065SichuanChina School of Mechanical Engineering Sichuan UniversityChengdu610065SichuanChina College of Water Resource&Hydropower Sichuan UniversityChengdu610065SichuanChina Jin Shi Drill Tech Co. LtdTangshan063004HebeiChina Pingdingshan Tianan Coal Mining Co. LTD.Pingdingshan467000HenanChina Xi'an Research Institute China Coal Technology&Engineering Group CorpXi'an710077ShaanxiChina

With the continuous development of deep oil and gas,minerals,geothermal resources,and other resources,there are increasingly more stringent requirements for *** particular,the ultra-highpressure dynamic seals of deep mining device need to be ***,considering the use of dynamic seals in unique deep mining environments,an ultra-high-pressure rotating combined dynamic seal was designed and developed and its sealing performance was experimentally measured and *** results show that the experimental device can operate stably under a pressure of up to150 MPa and a rotating speed of 76 r/min,and can also operate normally under a rotating speed of up to 140 r/min and a sealing pressure of 120 *** the operation of the ultra-high-pressure rotating combined dynamic seal,the sealing ring does not show obvious damage,which vouches for its sealing *** leakage of flow and pressure was detected in the all seal structures within the sealing pressure range of 0-150 ***,the dynamic sealing performance of the device is intact under ultra-high-pressure conditions and can be applied in deep mining environments at a certain *** research and development of this device can aid future deep energy exploration and exploitation.

关键词： Deep energy exploitation Ultra-high-pressure Rotating combination dynamic seal Development of test equipment

Towards a more flexible representation of water stress effects in the nonlinear Jarvis model

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Journal of Integrative Agriculture 2017年第1期16卷 210-220页

作者： yu Lian-yu CAI Huan-jie ZHENG Zhe LI Zhi-jun WANG jian Key Laboratory of Agricultural Soil and Water Engineering in Arid Area Ministry of Education/Northwest A&F UniversityYangling 712100P.R.China Institute of Water Saving Agriculture in Arid Regions of China(IWSA) Northwest A&F UniversityYangling 712100P.R.China

To better interpret summer maize stomatal conductance （gs） variation under conditions of changing water status at different growth stages, three water stress indicators, soil water content （SWC）, leaf-air temperature difference （AT） and leaf level water stress index （CWSIL） were employed in Jarvis model, which were Js, JT and Jc models respectively. Measurements of gs were conducted in a summer maize field experiment during the year 2012-2013. In the insufficient irrigation exper- iment, three levels of irrigation amount were applied at four different growth stages of summer maize. We constructed three scenarios to evaluate the performance of the three water stress indicators for estimating maize gs in a modified Jarvis model. Results showed that JT and Jc models had better simulation accuracy than the Js model, especially at the late growth stage （Scenario 1） or considering the plant recovery compensation effects （Scenario 2）. Scenario 3 indicated that the more environmental factors were adopted, the better prediction performance would be for Js model. While for JT model, two environmental factors （photosynthesis active radiation （PAR）, and vapor pressure deficit （VPD）） seemed good enough to obtain a reliable simulation. When there were insufficient environmental data, CWSI, would be the best option. This study can be useful to understand the response of plant stomatal to changing water conditions and will further facilitate the application of the Jarvis model in various environments.

关键词： summer maize stomatal conductance water status recovery compensation water stress indicators Jarvis model

Sorption of Am(Ⅲ) on Na-bentonite:Effect of pH,ionic strength,temperature and humic acid

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Chinese Chemical Letters 2012年第10期23卷 1189-1192页

作者： Tao yu Wang Suo Wu Qiao hui Fan Radiochemistry Laboratory School of Nuclear ScienceTechnologyLanzhou UniversityLanzhou 730000China College of Chemistry BiologyMaterials ScienceEast China Institute of TechnologyFuzhou 344000China

Sorption of Am（III） on Na-bentonite as a function of contact time, pH, ionic strength, humic acid （HA） and temperature was investigated under ambient conditions. The results showed that the sorption was strongly dependent on pH and ionic strength. Am（III） sorption Can be described well by pseudo-second-order model. The presence of HA takes a positive effect at low pH; but a negative influence under high pH range. Enthalpy, entropy and Gibbs free energy （i.e., △H0, △S0 and △G0） calculated from sorption isotherms suggested that sorption process of Am（III） was spontaneous and endothermic.

关键词： Sorption Am(III) Bentonite Humic acid