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Study on Ecological Compensative System of Songhua River Basin

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Study on Ecological Compensative System of Songhua River Bas...

Cloning of sft-4 and its influence on vitality and virulence of pine wood nematode,Bursaphelenchus xylophilus

2007 International Conference on Public Administration（ICPA 3rd）

作者： SHANG Jie chen Zhen-bing School of Economics and Management Northeast Forestry University School of Environment Beijing Normal University

Water pollution in Songhua river basin has worsened the environment in this *** it becomes more difficult to deal with ecology and environment,because of Songhua River flowing across provinces which comes into collision between ecological protection and economic development among different provinces and so *** paper aims to analyze the situation of water resources pollution in Songhua River Basin,study water resources and ecological problems in each province and draw the conclusion that it is available for effective solution of above problems to establish ecological compensative ***,it puts forward the blueprint of this system and illustration of compensative subjects,objects,methods and standards.

关键词： Songhua River Basin Ecological compensation Compensative System

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Journal of Forestry Research 2024年第5期35卷 191-200页

作者： Shuisong Liu Linsong Wang Ronggui Li Mengyu chen Wenjun Deng Chao Wang Guicai Du Qunqun Guo College of Life Sciences Qingdao UniversityQingdao 266071People’s Republic of China

In our previous screening of the transcriptome of the causal agent of the devastating pine wilt disease,pine wood nematode(PWN,Bursaphelenchus xylophilus),after treatment with the nematicide fomepizole,Surfeit locus gene sft-4,which encodes a regulatory factor,was found to be *** situ hybridization results showed that the sft-4 was continuously expressed from egg to adult and was especially high in the reproductive *** in a study of the effect of RNA interference(RNAi)of sft-4 and recombinant SFT-4 on PWN activity,treatment with sft-4 dsRNA inhibited feeding,reproduction,oviposition and egg hatching of PWN with the greatest inhibition on reproduction and oviposition,whereas recombinant SFT-4 had the opposite *** addition,RNAi of sft-4 changed the female–male ratio and lifespan of *** bioassays of PWNs,with RNAi of sft-4 on seedlings and 2-year-old Pinus thunbergii trees,none of the treated plants developed symp-toms during the monitoring period,indicating that virulence of PWNs was either significantly *** results indicate that the influence of sft-4 on PWN pathogenicity may be mainly through regulating reproductive function of PWN and its lifespan.

关键词： Black pine Pinaceae Bursaphelenchus xylophilus Sft-4 In situ hybridization RNAi Pathogenicity

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Exploring a new path of green and efficient utilization of sinter return fine to produce composite pellets

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Journal of Iron and Steel Research International 2024年第7期31卷 1610-1622页

作者： Yan-biao chen Wen-guo Liu Hao Guo Jing-song Wang Qing-guo Xue Hai-bin Zuo State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China MCC Capital Engineering and Research Incorporation Limited Beijing 100176China

Efficient utilization of sinter return fine is an important measure to reduce cost,increase efficiency,save energy and reduce emission.A new path of green and efficient utilization of return fine was proposed to produce composite *** metallurgical properties of composite pellets under the condition of hydrogen-rich blast furnace were *** experimental results indicate that the coated concentrate was consolidated for the composite pellets through normal Fe_(2)O_(3) *** the surface of core return fine,the liquid phase formed due to its low-melting point,assimilated the adjacent concentrate,and then consolidated with the temperature *** with regular pellets,the com-pressive strength and reduction swelling index of composite pellets were decreased,but the reducibility index and softening-melting properties were *** addition,the reduction degradation index of composite pellets was sig-nificantly higher than that of ***,adding composite pellets was conducive to indirect reduction in blast furnace,reducing fuel ratio and improving production *** to the effect of the roasting system on the metallurgical properties,the roasting temperature and time were determined as 1250℃and 30 min,*** composite pellets can be produced under the traditional pelletizing process.

关键词： Sinter Return fine Composite pellet Roasting system Metallurgical property Hydrogen-rich blast furnace

Hepatoid adenocarcinoma of the stomach with neuroendocrine differentiation:A case report and review of literature

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World Journal of Clinical Cases 2023年第22期11卷 5329-5337页

作者： He Fei Ze-Feng Li Ying-Tai chen Dong-bing Zhao Department of Pancreatic and Gastric Surgical Oncology National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China

BACKGROUND Both hepatoid adenocarcinoma of the stomach(HAS)and neuroendocrine differentiation(NED)are rare histological subtypes of gastric cancer with unique clinicopathological features and unfavorable *** with NED is even *** SUMMARY Here,we report a 61-year-old man with HAS with NED,as detected by gastric wall thickening by positron emission tomography/computed tomography for a pulmonary *** gastrectomy was performed,and pathological examination led to the diagnosis of HAS with ***,liver metastases occurred 6 mo later despite adjuvant chemotherapy,and the patient died 27 mo *** We treated a patient with HAS with NED who underwent adjuvant chemotherapy after radical surgery and still developed liver *** first report the detailed processes of the treatment and development of HAS with NED,providing an important reference for the clinical diagnosis and treatment of this condition.

关键词： Gastric cancer Hepatoid adenocarcinoma Neuroendocrine differentiation Liver metastasis Case report

Effects of zeolite imidazole frameworks on rice seedlings (Oryza sativa L.): Phytotoxicity, transformation, and bioaccumulation

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Journal of Environmental Sciences 2024年第10期144卷 15-25页

作者： Chaofa chen Yongqi Yao chenghua Xing Yunyu Guo Luyi Cai Jianfang Yan Xi-Lin Wu Miaozhen Cai College of Geography and Environmental Science Zhejiang Normal UniversityJinhuaZhejiang 321004China College of Agriculture Jinhua PolytechnicJinhuaZhejiang 321007China

Zeolite imidazole frameworks(ZIFs),a class of the metal organic framework,have been extensively studied in environmental ***,their environmental fate and potential ecological impact on plants remain ***,we investigated the phytotoxicity,transformation,and bioaccumulation processes of two typical ZIFs(ZIF-8 and ZIF-67)in rice(Oryza sativa L.)under hydroponic ***-8 and ZIF-67 in the concentration of 50 mg/L decreased root and shoot dry weight maximally by 55.2%and 27.5%,53.5%and 37.5%,*** scanning electron microscopy(SEM)imaging combined with X-ray diffraction(XRD)patterns revealed that ZIFs on the root surface gradually collapsed and transformed into nanosheets with increasing cultivation *** fluorescein isothiocyanate(FITC)labeled ZIFs were applied to trace the uptake and translocation of ZIFs in *** results demonstrated that the transformed ZIFs were mainly distributed in the intercellular spaces of rice root,while they cannot be transported to culms and *** so,the Co and Zn contents of rice roots and shoots in the ZIFs treated groups were increased by 1145%and 1259%,145%and 259%,respectively,compared with the control *** findings suggested that the phytotoxicity of ZIFs are primarily attributed to the transformed ZIFs and to a less extent,the metal ions and their ligands,and they were internalized by rice root and increased the Co and Zn contents of *** study reported the transformation of ZIFs and their biological effectiveness in rice,highlighting the potential environmental hazards and risks of ZIFs to crop plants.

关键词： Zeolitic imidazolate frameworks (ZIFs) Rice(Oryza sativa L.) Phytotoxicity Transformed ZIFs ZIFs bioaccumulation

Ultrafast Response and Threshold Adjustable Intelligent Thermoelectric Systems for Next‑Generation Self‑Powered Remote IoT Fire Warning

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Nano-Micro Letters 2024年第11期16卷 413-428页

作者： Zhaofu Ding Gang Li Yejun Wang Chunyu Du Zhenqiang Ye Lirong Liang Long‑cheng Tang Guangming chen College of Materials Science and Engineering&College of Civil and Transportation Engineering Shenzhen UniversityShenzhen 518055People’s Republic of China College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material Technology of MoEHangzhou Normal UniversityHangzhou 311121People’s Republic of China

Fire warning is vital to human life,economy and ***,the development of effective warning systems faces great challenges of fast response,adjustable threshold and remote ***,we propose an intelligent self-powered remote IoT fire warning system,by employing single-walled carbon nanotube/titanium carbide thermoelectric composite *** flexible films,prepared by a convenient solution mixing,display p-type characteristic with excellent high-temperature stability,flame retardancy and TE(power factor of 239.7±15.8μW m^(-1) K^(-2))*** comprehensive morphology and structural analyses shed light on the underlying *** the assembled TE devices(TEDs)exhibit fast fire warning with adjustable warning threshold voltages(1–10 mV).Excitingly,an ultrafast fire warning response time of~0.1 s at 1 mV threshold voltage is achieved,rivaling many state-of-the-art ***,TE fire warning systems reveal outstanding stability after 50 repeated cycles and desired durability even undergoing 180 days of air ***,a TED-based wireless intelligent fire warning system has been developed by coupling an amplifier,analogto-digital converter and Bluetooth *** combining TE characteristics,high-temperature stability and flame retardancy with wireless IoT signal transmission,TE-based hybrid system developed here is promising for next-generation self-powered remote IoT fire warning applications.

关键词： Thermoelectric Self-powered IoT fire warning Ultrafast response Threshold adjustable

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Dauricine can inhibit the activity of proliferation of urinary tract tumor cells

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Asian Pacific Journal of Tropical Medicine 2012年第12期5卷 973-976页

作者： Jun Wang Yuan Li Xiong-bing Zu Min-Feng chen Lin Qi Department of Urology Xiangya HospitalCentral South University

Objective:To explore the anti-tumor effects of asiatic moonseed rhizome extraction-dauricine on bladder cancer EJ cell strain,prostate cancer PC-3Mcell strain and primary cell culture ***:The main effective component-phenolic alkaloids of Menispermum dauricum was extracted and separated from asiatic moonseed rhizome by chemical *** method was used to detect dauricine anti-tumor ***:Dauricine had an obvious proliferation inhibition effect on the main tumor cells in urinary *** minimum drug sensitivity concentration was between ***μg/mL,and the inhibition ratio increased with the increase of ***:Dauricine,the main effective component extracted from asiatic moonseed rhizome,had a good inhibition effect on tumor cells in urinary *** the same time,Dauricine has certain inhibition effects on the primary cultured tumor cell.

关键词： PAMD Dauricine Urinary system EJ cell strain PC-3Mcell strain

A genetic algorithm used in a 61-element adaptive optical system

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Frontiers of Optoelectronics 2008年第Z2期1卷 263-267页

作者： Ping YANG bing XU Wenhan JIANG Shanqiu chen Institute of Optics and Electronics Chinese Academy of Sciences Graduate School of Chinese Academy of Sciences

To correct the phase aberrations in a wavefront, a wavefront sensorless adaptive optical(AO) system is set up. A real-number encoding Gaussian mutation genetic algorithm(GA) that is adopted to control a 61-element deformable mirror(DM) is presented. This GA uses the light intensity behind a pinhole on the focal plane as the objective function to optimize, and therefore to omit the procedure of measuring the phase aberrations in the laser wavefront by a wavefront sensor. Phase aberrations generated by the DM are brought to an ideal incident wavefront. Several correction simulations have been accomplished. The simulation results show that the genetic algorithm is capable of finding the optimum DM shape to correct the phase aberrations. After the phase aberrations of the wavefront have been corrected by GA, the peak light intensity on the focal plane can be improved at most by a factor of 30, and the encircled energy Strehl ratio can be increased ultimately to 0.96from 0.032. It is also found that the convergence and stability of the 61 voltages on the DM is quite well. The simulation results prove that the genetic algorithm can be used in AO systems effectively.

关键词： adaptive optics peak intensity genetic algorithm deformable mirror Zernike polynomial

基于轻量化YOLOv4机场场面遥感图像目标检测方法

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计算机与现代化 2024年第2期 93-99页

作者：杨轲董兵吴悦郝宽公彭自琛中国民用航空飞行学院空中交通管理学院四川德阳618300

针对现有遥感图像目标检测方法存在深层CNN丢失局部特征信息、复杂场景检测精度低的问题,提出一种基于轻量化YOLOv4的目标检测方法。首先,采用轻量级神经网络Ghostnet替代YOLOv4中作为主干特征提取的CSPdarknet53网络;其次,为改善复杂... 详细信息

针对现有遥感图像目标检测方法存在深层CNN丢失局部特征信息、复杂场景检测精度低的问题,提出一种基于轻量化YOLOv4的目标检测方法。首先,采用轻量级神经网络Ghostnet替代YOLOv4中作为主干特征提取的CSPdarknet53网络;其次,为改善复杂环境检测能力,采用CycleGAN仿真夜间场景;再次,融合Transformer模块,使模型易于采集网络特征间关系和局部信息;最后,采用Adam优化器和K-means++筛选锚框的方式加速收敛速度,并以RSOD航空遥感数据集进行实例验证。实验结果表明本文算法较原YOLOv4的MAP值提高了6.65个百分点,参数量减小了84.7%,可以满足复杂场景下的机场场面航空器实时目标检测。

关键词：实时目标检测遥感图像复杂场景机场场面

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