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CK-45W-40发动机油在DPF轻卡上的应用研究

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润滑油 2024年第4期39卷 4-10页

作者：刘恒瑞刘文辉李文华王伟王天儒张志欣中国石油上海润滑油产品设计分公司辽宁大连116032 东北财经大学辽宁大连116025 中国石油上海润滑油产品设计分公司甘肃兰州730060 中国石油上海润滑油产品设计分公司上海201800 中国石油大连润滑油分公司辽宁大连116032

随着物流运输行业中轻卡的国家排放法规升级,应用颗粒捕集器(DPF)、废气再循环(EGR)等技术的轻卡车辆数量逐渐攀升。发动机后处理系统新技术的应用,对发动机润滑油的各项性能提出了更高的要求。文章介绍了API CK-4规格的台架性能要求及... 详细信息

随着物流运输行业中轻卡的国家排放法规升级,应用颗粒捕集器(DPF)、废气再循环(EGR)等技术的轻卡车辆数量逐渐攀升。发动机后处理系统新技术的应用,对发动机润滑油的各项性能提出了更高的要求。文章介绍了API CK-4规格的台架性能要求及与CI-4规格的性能指标差异,并对研制的CK-4 5W-40柴油发动机油在轻卡上的应用性能进行了研究。结果表明:CK-4 5W-40在加装颗粒捕集器的轻卡车辆上行驶里程可达3万km,能为物流运输行业有效降低车辆运营中的保养成本。

关键词： CK-45W-40 发动机油柴油机油 DPF 轻卡

Research on Micro-Flow Self-Sensing Actuators Based on Piezoelectric Ceramic Stack `

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Journal of Harbin Institute of Technology(New Series) 2014年第2期21卷 63-67页

作者： Yan-Bo wei Li-Ping Shi Xi-wen wei jie Huang School of Electronic Engineering Heilongjiang University

The paper is concerned with the micro-flow self-sensing actuators,the work of which is based on the secondary piezoelectric effect. The piezoelectric ceramic stack can yield micro-displacement due to its first inverse piezoelectric effect. Therefore,we apply this micro-displacement to cell micro-flow injection. Moreover, due to the charge of the secondary direct piezoelectric effect,the piezoelectric ceramic stack is able to detect the force and displacement in the injection by itself. The experiments of first inverse piezoelectric effect and secondary direct piezoelectric effect are conducted. The experiment results show that,subjected to 0- 60 V input,the piezoelectric ceramic stack can generate 13. 45 μm displacement,and control accuracy can achieve 2 nm. It can completely meet the needs of cell micro-flow injection. Also,the experiments demonstrate that the micro-displacement due to the first inverse piezoelectric effect can be well self-sensed by the electric charge due to the secondary direct piezoelectric effect.

关键词： secondary piezoelectric effect micro-flow self-sensing actuator

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透明质酸锌的抗炎和控油功效

日用化学品科学 2024年第7期47卷 32-36页

作者：陈仙祺孙欣曲文杰邹松岩王靖江南大学化工与材料工程学院化妆品研究中心江苏无锡214122 华熙生物科技股份有限公司研发中心北京100022

透明质酸锌(Zinc hyaluronate,HA-Zn)是一种新型的透明质酸衍生物原料,具有促进创伤愈合、抗微生物、抗氧化等功效。本文使用2种细胞人皮脂腺细胞SZ95和人真皮乳头细胞HDPC,通过体外实验证明了透明质酸锌具有抗炎和控油的功效,是一种有... 详细信息

透明质酸锌(Zinc hyaluronate,HA-Zn)是一种新型的透明质酸衍生物原料,具有促进创伤愈合、抗微生物、抗氧化等功效。本文使用2种细胞人皮脂腺细胞SZ95和人真皮乳头细胞HDPC,通过体外实验证明了透明质酸锌具有抗炎和控油的功效,是一种有潜力的皮肤护理活性成分。在二氢睾酮DHT刺激模型实验中,HA-Zn对DHT刺激炎症因子IL-8、IL-6的释放具有显著抑制效果,抑制率能达到55.5%、32.8%。HA-Zn对SZ95细胞脂质分泌的抑制率能达到31%。

关键词：透明质酸锌 SZ95 HDPC 抗炎控油

Genome-wide in vitro and in vivo RNAi screens reveal Fer3 to be an important regulator of kkvtranscription in Drosophila

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Insect Science 2022年第3期29卷 614-630页

作者： Xiangzhao Yue Yongkang Liang Zhishuang wei Jun Lv Yongjin Cai Xiaobin Fan wenqing Zhang jie Chen Guangdong Provincial Key Laboratory of High Technology for Plant Protection Plant Protection Research InstituteGuangdong Academy of Agricultural SciencesGuangzhouChina State Key Laboratory of Biocontrol School of Life SciencesSun Yat-sen UniversityGuangzhouChina College of Life Sciences Shangrao Normal UniversityShangraoJiangxi ProvinceChina

Krotzkopf verkehrt(kkv)is a key enzyme that catalyzes the synthesis of chitin,an important component of the Drosophila epidermis,trachea,and other ***,we report the use of comprehensive RNA interference(RNAi)analyses to search for kkv transcriptional regulators.A cell-based RNAi screen identified 537 candidate kkv regulators on a genome-wide *** use of transgenic Drosophila lines expressing RNAi constructs enabled in vivo validation,and we identified six genes as potential kkv transcriptional *** of the kkvDsRed signal,an in vivo reporter indicating kkv promoter activity,was observed when the expression of Akirin,NFAT,48 related 3(Fer3),or Autophagy-related 101(Atg101)was knocked down in Drosophila at the 3rd-instar larval stage;whereas we observed disoriented taenidial folds on larval tracheae when Lines(lin)or Autophagy-related 3 (Atg3)was knocked down in the ***3,in particular,has been shown to be an important factor in the activation of kkv transcription via specific binding with the kkv *** genes involved in the chitin synthesis pathway were widely affected by the downregulation of ***,Atg101,Atg3,Akirin,Lin,NFAT,Pnr,and Abd-A showed that the potential complex mechanism of kkv transcription is regulated by an interaction network with bithorax complex *** study revealed the hitherto unappreciated diversity of modulators impinging on kkv transcription and opens new avenues in the study of kkv regulation and chitin biosynthesis.

关键词： chitin biosynthesis Fer3 genome-wide RNAi kkv transcriptional regulator

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林夜鹰、黄冠啄木鸟、雪雁在浙江的发现记述

浙江林业科技 2024年第4期44卷 101-104页

作者：熊胜温超然钱程金伟徐天乐衢州市森林资源保护中心浙江衢州324000 浙江省森林资源监测中心浙江杭州310016 浙江自然博物院浙江杭州310014

本文记述了2022—2023年3种浙江省鸟类分布新记录,分别是林夜鹰Caprimulgus affinis、黄冠啄木鸟Picus chlorolophus和雪雁Anser caerulescens,其中,林夜鹰和黄冠啄木鸟可能为气候变暖等因素导致的分布北扩,雪雁可能是因为北方冬季极寒... 详细信息

本文记述了2022—2023年3种浙江省鸟类分布新记录,分别是林夜鹰Caprimulgus affinis、黄冠啄木鸟Picus chlorolophus和雪雁Anser caerulescens,其中,林夜鹰和黄冠啄木鸟可能为气候变暖等因素导致的分布北扩,雪雁可能是因为北方冬季极寒天气和食物匮乏或在迁徙途中脱离队伍等南下;从居留型看,推测林夜鹰在浙江的居留型应为留鸟或夏候鸟,黄冠啄木鸟在浙江的居留型应为留鸟,雪雁在浙江应为迷鸟。本次的发现结果是对浙江鸟类多样性数据资料的进一步补充。

关键词：林夜鹰黄冠啄木鸟雪雁新记录浙江省

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甘肃分布木本植物7个新记录种

陕西林业科技 2024年第1期52卷 78-81页

作者：刘学杰刘亚迪雍海娟何文陇南市康南林业总场甘肃康县746500

甘肃省木本植物分布7个新记录种,分别是大麻科朴属-西川朴Celtis vandervoetiana、鼠李科雀梅藤属-刺藤子Sageretia melliana、壳斗科青冈属-多脉青冈Cyclobalanopsis multinervis、壳斗科青冈属——褐叶青冈Cyclobalanopsis stewardiana、芸香科花椒属——椿叶花椒Zanthoxylum ailanthoides、冬青科冬青属——尾叶冬青Ilex wilsonii、卫矛科卫矛属——狭叶卫矛Euonymus tsoi。

关键词：甘肃分布木本植物新记录

Flow characteristics in curved open channel with partial suspended vegetation

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Journal of Mountain Science 2022年第9期19卷 2715-2728页

作者： ZHANG Qiao-ling JING He-fang LI Chun-guang WANG wei-hong ZHANG wen-sheng School of Mathematics and Information Science North Minzu UniversityYinchuan 750021China School of Civil Engineering North Minzu UniversityYinchuan 750021China

Suspended vegetation in open channels such as natural river,lake,reservoir usually affect the flow structure,causing the change of the water environment,sediment transport,bed *** order to study the water flow behavior in curved open channels under the influence of suspended vegetation,experiments were conducted in a Ushaped flume with 180°bend where the suspended vegetation substituted by cylindrical glass rods were partially *** particle image velocimeter(PIV)system was employed to measure the flow velocities of various cases with different vegetation arrangements and roots *** and analysis were conducted for measured data,such as water level,velocity,head loss,Reynolds stress,and turbulence kinetic energy(TKE)to obtain certain general rules of water flow in open curved channels with suspended *** can be found from the measured data that the water level and the head loss in the vegetation area are closely related to the arrangements of the suspended ***,the drag force of the vegetation can not only lead to smaller increments of longitudinal TKE above the vegetation tail than that below it,but also lead to the flow velocities in vegetation area much smaller than areas without *** addition,suspended vegetation weakens the vortex strength near the water surface and increases the vortex strength below the vegetation tail,and the flow velocity in the vegetation area has a close relationship with the suspended vegetation length in the ***,it can be concluded that the reasonable arrangements of suspended vegetation group in curved open channel can protect the concave bank from being scoured,and protect the convex bank from being deposited.

关键词： Curved open channel PIV Suspended vegetation Vegetation arrangements Turbulence kinetic energy

湖南沅江鼎城段河蚬的性别组成与精子形态特征

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动物学杂志 2024年第3期59卷 387-396页

作者：王旭皮杰刘林崴唐杨欣刘新华向建国李德亮湖南农业大学水产学院长沙410128 湖南应用技术学院农林科技学院常德415100

本研究以湖南沅江鼎城段河蚬(Corbicula fluminea)为研究对象,在进一步验证该群体性别组成的基础上,分析壳长组成与性别比例之间关系,探讨该群体雄性、雌性和雌雄同体之间关系;同时以单鞭毛精子为参照,分析比较双鞭毛精子的形态特征,以... 详细信息

本研究以湖南沅江鼎城段河蚬(Corbicula fluminea)为研究对象,在进一步验证该群体性别组成的基础上,分析壳长组成与性别比例之间关系,探讨该群体雄性、雌性和雌雄同体之间关系;同时以单鞭毛精子为参照,分析比较双鞭毛精子的形态特征,以期为我国河蚬的性别发生及生殖适应策略研究提供基础资料。结果显示:沅江鼎城段河蚬(n=770)雄性、雌性和雌雄同体最小性成熟壳长分别为2.92mm、5.66mm和5.30mm。697只性成熟河蚬中雄性、雌性和雌雄同体的比例近似1︰1︰6。雌雄同体的平均壳长[(22.55±0.33)mm,n=517]显著大于雄性[(20.44±1.03)mm,n=95]和雌性[(19.79±0.99)mm,n=85](P0.05)。河蚬可以产生单鞭毛和双鞭毛两种类型的精子,单鞭毛精子头长范围4.93~21.79μm,平均值(14.27±0.82)μm(n=30),双鞭毛精子头长范围10.29~22.04μm,平均值(15.62±0.62)μm(n=26)。单、双鞭毛精子头长差异不显著(P>0.05)。双鞭毛精子(n=26)长尾的平均长度[(38.07±1.44)μm]显著大于其短尾[(31.08±1.60)μm]和单鞭毛精子(n=30)尾部长度[(30.15±1.75)μm](P0.05)。结果表明:湖南沅江鼎城段河蚬为雄性先熟,且可能存在雄性和(或)雌性向雌雄同体转换现象。河蚬具有单鞭毛型和双鞭毛型2种类型的精子,且双鞭毛精子的2个尾部不等长。同域共存河蚬的单鞭毛与双鞭毛精子在运动及受精能力方面的差异值得深入研究。

关键词：河蚬雌雄同体精子形态雄性先熟性转换

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盾构隧道下穿水域环境掘进参数预测研究

建筑机械化 2024年第6期45卷 48-53页

作者：文为刘倩李文龙狄琛刘学佳中建五局土木工程有限公司湖南长沙410004 中南林业科技大学土木工程学院湖南长沙410004

依托西安地铁8号线,构建了基于BP神经网络的水域环境盾构掘进参数预测模型,分析与评估了预测模型的误差与精度,并应用于指导工程实践。研究结果表明,构建的水域环境盾构掘进参数预测模型输出预测值与实测值的变化趋势吻合度高、绝对误... 详细信息

依托西安地铁8号线,构建了基于BP神经网络的水域环境盾构掘进参数预测模型,分析与评估了预测模型的误差与精度,并应用于指导工程实践。研究结果表明,构建的水域环境盾构掘进参数预测模型输出预测值与实测值的变化趋势吻合度高、绝对误差值均小于5%,预测精度良好;实践应用中,隧道下穿水域段拱顶累计沉降小于4mm,均满足相关规范。随着类似案例的不断增多,该研究成果具有广泛的应用前景和实用价值。

关键词：盾构隧道水域环境掘进参数 BP神经网络预测