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预处理对热风-压差膨化干燥香菇脆片品质的影响

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陕西科技大学学报 2024年第2期42卷 62-71页

作者：常大伟任娜牛瑶卢亚婷康婕王虎玄陕西科技大学食品科学与工程学院陕西西安710021 陕西科技大学机电工程学院陕西西安710021 陕西省产品质量监督检验研究院陕西西安710048

为提高香菇产品的质量,以香菇片为原料,采用了冻融预处理、海藻酸钠涂膜预处理、蔗糖溶液渗透预处理和纤维素酶解预处理四种不同的预处理方法,并结合热风-压差膨化联合干燥技术对香菇片进行干燥.研究了不同预处理方式对香菇水分分布的影... 详细信息

为提高香菇产品的质量,以香菇片为原料,采用了冻融预处理、海藻酸钠涂膜预处理、蔗糖溶液渗透预处理和纤维素酶解预处理四种不同的预处理方法,并结合热风-压差膨化联合干燥技术对香菇片进行干燥.研究了不同预处理方式对香菇水分分布的影响,对不同预处理香菇片在热风预干燥过程中的热风干燥特性曲线进行干燥动力学模型拟合,并对所得压差膨化香菇脆片的色泽、质构、复水性、感官评分和微观结构进行分析.结果表明,与未预处理的香菇片相比,预处理显著影响了香菇片的水分状态.Modified Page模型能更准确地描述不同预处理方式处理后香菇片的热风预干燥过程,从而预测预干燥过程中水分含量的变化.冻融和酶解预处理均显著提高了热风干燥过程中的水分扩散系数,有效的提高了热风干燥速率,缩短了预干燥时间,但最终压差膨化产品的色差较大,感官评分较低,膨化效果不明显.渗透预处理在色泽和口感方面表现出优势,但在热风干燥过程中,其水分扩散系数显著降低,导致预干燥时间延长,且压差膨化后的产品硬度相对最高.涂膜预处理的香菇脆片在热风干燥过程中与未处理的样品具有相同的热风干燥时间,并且其压差膨化后的产品膨化效果明显,具有相对较好的色泽和感官评分.其微观结构呈现规则、均匀的空腔结构,质构和复水性相较于未经预处理的香菇明显提升.综合比较,相对于其他预处理方法,涂膜预处理显著提高了香菇脆片的品质和感官评价,是生产压差膨化香菇脆片的较优方法,为香菇产品生产提供了有益的借鉴和参考.

关键词：香菇预处理低场核磁共振压差膨化干燥果蔬脆片

Influence of vibration on the grain flow sensor during the harvest and the difference elimination method

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International Journal of Agricultural and Biological Engineering 2021年第5期14卷 149-162页

作者： Pengfei Qian ting lu Cheng Shen Shuren Chen Key Laboratory of Modern Agricultural Equipment and Technology Ministry of EducationJiangsu UniversityZhenjiang 212013JiangsuChina School of Mechanical Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina Nanjing Institute of Agricultural Mechanization Ministry of Agriculture and Rural AffairsNanjing 210014China

The grain yield data collected by the intelligent yield measurement system of the combine harvester is generated into a field plot yield distribution map,which is of great significance for guiding agricultural ***,in the process of drawing the yield map,the combine harvester is affected by vibration during operation and the generated error data in the process of collecting data which will cause the drawing results to be *** study researched two factors that cause errors,then,the influence of vibration interference on the measurement signal was eliminated by filtering,vibration isolation,and designing a double-plates differential grain flow *** methods were taken to eliminate random errors,gross errors and systematic errors,including using the arithmetic average value to replace the true value,the 3σcriterion,and removing the filling time data and the delaying time ***,the grain yield distribution map was obtained through Matlab and *** results showed that the interference frequency above 50 Hz could be eliminated by filtering,but it was difficult to filter the low-frequency signal which was close to the grain impact *** vibration amplitude was reduced to 14.29%by adding a vibration isolation plate,and the SNR was increased from−4.67 dB to 29.21 dB by combining low-pass filtering and damping vibration *** the grain feeding rate was 2 kg/s,the natural vibration amplitude of the sensor after difference was about 0.02 V and evenly distributed around the zero voltage 0.2 *** influence of positive and negative offset on the average value of grain impact signal could be ignored,and the signal-to-noise ratio was increased from 29.21 dB to 62.49 *** results of field experiments showed that the yield map drawn can clearly display the yield value of the harvest area,which is used to guide agricultural production.

关键词： combine harvester grain flow sensor vibration interference double-plates differential elimination method

Factors for wireless operators'collusion and competition

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The Journal of China Universities of Posts and Telecommunications 2007年第1期14卷 61-64页

作者： WEN Dan-hui CHEN Rong-bang lu ting-jie School of Economics and Management Tsinghua UniversityBeijing 100084 China School of Higher Vocational Education Henan Polytechnic UniversityJiaozuo 454000 China School of Economics and Management Science Beijing University of Posts andTelecommunications Beijing 100876 China

This article analyses on why China Mobile and China Unicom have chosen price war rather than tacit collusion these years. On the basis of the analysis on factors that influence tacit collusion, and combined with the facts of wireless communication market, the author suggests that the market asymmetries, cost asymmetries, and product differentiation are the basic factors, which trigger price competition between the Chinese wireless operators. By constructing a game model based on Chum rate, this article discusses how these factors cause a fight between the operators and how vigorous the price competition will be. At last, the author suggests that to keep vigor in this industry, continuous structural adjustment is essential. Besides, the number portability policies may cause tacit collusion.

关键词： chum rate wireless communication collusion,market asymmetries cost asymmetries product differentiation

GSK-3介导的信号通路在类风湿关节炎中的作用的研究进展

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重庆医学 2024年第3期53卷 451-455页

作者：陆婷蒋总兰维娅唐芳贵州中医药大学贵阳550002 贵州中医药大学第二附属医院风湿免疫科贵阳550003

类风湿关节炎(RA)作为一种炎症性疾病,可导致多系统损伤,其中以关节损伤最为常见。RA的发病机制尚未明确,有研究表明,糖原合成酶激酶3(GSK-3)与RA的发展密切相关。GSK-3作为一种混杂的蛋白激酶,其不同底物的磷酸化对许多生理和病理产生... 详细信息

类风湿关节炎(RA)作为一种炎症性疾病,可导致多系统损伤,其中以关节损伤最为常见。RA的发病机制尚未明确,有研究表明,糖原合成酶激酶3(GSK-3)与RA的发展密切相关。GSK-3作为一种混杂的蛋白激酶,其不同底物的磷酸化对许多生理和病理产生重大影响,并在多种疾病中失调。GSK-3参与许多信号通路的调控,并通过不同的方式作用于RA。研究发现,GSK-3主要通过Wnt/β-连环蛋白(β-catenin)、磷酸酰肌醇3激酶(PI3K)/蛋白激酶B(Akt)、核因子-κB(NF-κB)3条信号通路在RA中发挥作用。该文就GSK-3与上述3条信号通路在RA中的发生、发展及作用做一综述。

关键词：糖原合成酶激酶3 信号通路类风湿关节炎作用

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江西省R&D经费投入的特征分析及提升对策研究

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科技广场 2024年第2期 68-74页

作者：梅丁丁王金凤童金杰卢婷江西省科学技术信息研究所江西南昌330046

本文分析近年来江西省R&D经费投入的特征及问题,研究表明:江西省R&D经费投入总量和强度均保持较快增长,但还存在投入总量规模不大、结构不优、财政资金投入相对较少等问题,并从强化企业创新主体地位、加大财政资金支持力度、提升科技金... 详细信息

本文分析近年来江西省R&D经费投入的特征及问题,研究表明:江西省R&D经费投入总量和强度均保持较快增长,但还存在投入总量规模不大、结构不优、财政资金投入相对较少等问题,并从强化企业创新主体地位、加大财政资金支持力度、提升科技金融支持研发创新以及提升科技统计质量等方面提出了对策建议,为江西省提升全社会研发投入水平,加快创新型省份建设提供了决策参考。

关键词：科技统计 R&D投入创新型省份

A hollow tubular NiCo layacknered double hydroxide@Ag nanowire structure for high-power-density flexible aqueous Ni//Zn battery

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Journal of Energy Chemistry 2022年第7期31卷 593-603,I0015页

作者： Xiaoyang Xuan Min Qian Likun Pan ting lu Yang Gao lu Han Lijia Wan Yueping Niu Shangqing Gong School of Physics East China University of Science and TechnologyShanghai 200237China Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China

Flexible aqueous Ni//Zn batteries have attracted much attention as promising candidates for energy storage in the field of flexible ***,the Ni-based cathodes still face the challenges of poor conductivity,confined charge/mass transfer,and *** this work,we designed a hollow tubular structure consisting of a conductive silver nanowire (Ag NW) wrapped by active Ni Co layered double hydroxide (LDH),for enhancing the electrical conductivity,improving the charge/mass transfer kinetics,and facilitating the ion *** optimizing the contents of Ni,Co and Ag NW,the Ni_(4)Co LDH@Ag_(1.5)NW composite shows a maximum specific capacity of 115.83 m Ah g^(-1)at 0.1 A g^(-1)measured in a two-electrode ***,the flexible aqueous Ni//Zn battery assembled by Ni_(4)Co LDH@Ag_(1.5)NW interwoven with multi-walled carbon nanotube cathode and Zn foil anode realizes a high power density of 160μW cm^(-2)at the energy density of 23.14μWh cm^(-2),which is superior compared with those of oxide/hydroxide based devices and even higher than those of many carbon-based supercapacitors,showing its promising potentials for flexible energy storage applications.

关键词： NiCo layered double hydroxide Silver nanowire Hollow tubular morphology Flexible Ni//Zn battery

Interacted Effect of Arbuscular Mycorrhizal Fungi and Polyamines on Root System Architecture of Citrus Seedlings

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Journal of Integrative Agriculture 2012年第10期11卷 1675-1681页

作者： WU Qiang-sheng ZOU Ying-ning LIU Chun-yan lu ting College of Horticulture and Gardening Yangtze University

Either arbuscular mycorrhizal fungi （AMF） or polyamines （PAs） may change root system architecture （RSA） of plants, whereas the interaction of AMF and PAs on RSA remains unclear. In the present study, we studied the interaction between AMF （Paraglomus occultum） and exogenous PAs, including putrescine （Put）, spermidine （Spd） and spermine （Spin） on mycorrhizal development of different parts of root system, plant growth, RSA and carbohydrate concentrations of 6-m-old citrus （Citrus tangerine Hort. ex Tanaka） seedlings. After 14 wk of PAs application, PA-treated mycorrhizal seedlings exhibited better mycorrhizal colonization and numbers of vesicles, arbuscules, and entry points, and the best mycorrhizal status of taproot, first-, second-, and third-order lateral roots was respectively found in mycorrhizal seedlings supplied with Put, Spd and Spm, suggesting that PAs might act as a regulated factor of mycorrhizal development through transformation of root sucrose more into glucose for sustaining mycorrhizal development. AMF usually notably increases RSA traits （taproot length, total length, average diameter, projected area, surface area, volume, and number of first-, second-, and third-order lateral roots） of only PA-treated seedlings. Among the three PA species, greater positive effects on RSA change and plant biomass increment of the seedlings generally rank as Spd〉Spm〉Put, irrespective of whether or not AMF colonization. PAs significantly changed the RSA traits in mycorrhizal but not in non-mycorrhizal seedlings. It suggests that the application of PAs （especially Spd） to AMF plants would optimize RSA of citrus seedlings, thus increasing plant growth （shoot and root dry weight）.

关键词： citrus lateral root mycorrhiza putrescine root system architecture spermidine spermine

Gas drainage efficiency improvement by increasing coalbed permeability using waterjet cutting system

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Journal of Coal Science & Engineering(China) 2010年第2期16卷 150-156页

作者： lu ting-kan ZHOU ting-yang YU Hong School of Energy Science and Engineering Henan Polytechnic University Jiaozuo 454000 China Rujigou Colliery Shenhua Ningxia Coal Group Shizuishan 750000 China Jiaozuo Coal Industry Group Co. Ltd. Henan Coal and Chemical Industry Group Co. Ltd. Jiaozuo 454000 China

This paper presented a method to create artificial fractures along the existing gas drainage borehole and increase the permeability of the coalbed using a high pressure waterjet cutting *** field work conducted in Rujigou Colliery, Shenhua Ningxia Coal Group demonstrate that the coalbed permeability is increased, and accordingly, gas drainage efficiency is improved up to 3 to 6 times over the traditional methods using high pressure waterjet ***, based on the monitoring data, the conceptual model for gas drainage process associated with different mining activities has been proposed, and few major advantages using waterjet assistance method have been identified.

关键词： permeability coalbed gas drainage waterjet Iongwalling

影像学评估局部进展期结直肠癌新辅助治疗后肿瘤退缩分级的研究进展

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磁共振成像 2024年第5期15卷 209-215,221页

作者：卢婷王媛媛周凤瑜董文洁杨海婷周俊林兰州大学第二医院放射科兰州730030 兰州大学第二临床医学院兰州730000 甘肃省医学影像重点实验室兰州730030 医学影像人工智能甘肃省国际科技合作基地兰州730030

结直肠癌是常见的消化系统恶性肿瘤之一,约60%~70%的结直肠癌患者在确诊时已为局部进展期直肠癌(locally advanced rectal cancer,LARC),新辅助治疗(neoadjuvant treatment,NAT)是LARC患者的标准治疗方案,近年来,随着NAT在LARC中展现出... 详细信息

结直肠癌是常见的消化系统恶性肿瘤之一,约60%~70%的结直肠癌患者在确诊时已为局部进展期直肠癌(locally advanced rectal cancer,LARC),新辅助治疗(neoadjuvant treatment,NAT)是LARC患者的标准治疗方案,近年来,随着NAT在LARC中展现出良好的治疗效果,NAT在局部进展期结肠癌也得到了初步临床应用,但并非所有局部进展期结直肠癌(locally advanced colorectal cancer,LACRC)患者均能从NAT中获益。因此,术前精准评估NAT疗效,筛选NAT优势人群是一个亟待解决的临床问题。诸多证据表明影像学可在术前评估LACRC-NAT疗效。因此,本文就计算机体层成像(computed tomography,CT)、MRI、正电子发射计算机体层成像(positron emission tomography/computed tomography,PET/CT)、影像组学及深度学习在LACRC-NAT疗效评估中的应用现状、优势及局限性进行综述,旨在提升影像学评估LACRC-NAT疗效的准确性,为临床制订个体化的NAT方案提供全面、客观的影像学依据。

关键词：结直肠癌新辅助治疗疗效评估计算机体层成像磁共振成像人工智能