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地膜污染对农田土壤与作物影响及其控制研究

浙江农业科学 2024年第9期65卷 2224-2230页

作者：刘莹常珺枫李陈黄文星施俊生徐湘博马友华农田生态保育与污染防控安徽省重点实验室安徽农业大学资源与环境学院安徽合肥230036 安徽省农业生态环境总站安徽合肥230001 中国科学院地理科学与资源研究所北京100101

地膜在农业生产中具有增温保水、除草、节省肥料等作用,但随着地膜覆盖范围的扩大、不合理使用以及残膜回收机制的匮乏,使得大量地膜残留于土壤中,对土壤性状、作物产量及其生长发育造成不良影响。文章综述了残膜对土壤理化性质、生物... 详细信息

地膜在农业生产中具有增温保水、除草、节省肥料等作用,但随着地膜覆盖范围的扩大、不合理使用以及残膜回收机制的匮乏,使得大量地膜残留于土壤中,对土壤性状、作物产量及其生长发育造成不良影响。文章综述了残膜对土壤理化性质、生物学性质、作物产量与品质研究进展,同时对地膜污染影响因子进行分析,并从政策法规、地膜技术研发等方面提出地膜污染控制对策,旨在为地膜污染监测、治理提供科学引导和参考,促进农业的可持续发展。

关键词：地膜污染土壤作物控制措施

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基于小波的同态滤波算法在ICT图像增强中的应用

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长春理工大学学报（自然科学版） 2007年第3期30卷 44-46页

作者：郑东梅石俊生宋晓辉戴正国韦宏强于明飞云南师范大学 63867部队 93313部队

针对ICT图像对比度低、边缘模糊、细节不清晰等问题,提出采用基于小波的同态滤波算法来对图像进行增强。同态滤波可以有效地减少亮度不均匀,并对感兴趣的景物进行有效增强。首光使用基于照明反射模型的同态滤波方法,介绍模型的原理、实... 详细信息

针对ICT图像对比度低、边缘模糊、细节不清晰等问题,提出采用基于小波的同态滤波算法来对图像进行增强。同态滤波可以有效地减少亮度不均匀,并对感兴趣的景物进行有效增强。首光使用基于照明反射模型的同态滤波方法,介绍模型的原理、实现过程和特点,给出了适用的滤波模型和表达式。引入基于小波变换的同态滤波方法,采用高通滤波对小波变换系数进行处理,在保持图像总体原貌的基础上对图像局部对比度增强,效果显著。

关键词： ICT图像小波变换同态滤波图像增强

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应对极端气候的水稻品种选择与育种技术对策

浙江农业科学 2023年第4期64卷 786-790页

作者：徐晓征施俊生游兆彤王建军王仁杯崔永涛宋建唐立群浙江农林大学现代农学院浙江杭州313000 浙江省农业科学院作物与核技术利用研究所浙江杭州310021 浙江省种子管理总站浙江杭州310020

近10 a来浙江省的年平均气温上升,年降雨量增加,年日照时间减少,导致极端气候时常发生,对水稻生产构成严重威胁。本文通过分析影响浙江省水稻生产的高温热害、低温冷害、降雨不均匀或高温导致的灾害,以及暴雨或台风造成的倒伏等灾害性气... 详细信息

近10 a来浙江省的年平均气温上升,年降雨量增加,年日照时间减少,导致极端气候时常发生,对水稻生产构成严重威胁。本文通过分析影响浙江省水稻生产的高温热害、低温冷害、降雨不均匀或高温导致的灾害,以及暴雨或台风造成的倒伏等灾害性气候,综合农户应对极端气候的减灾响应与对策,提出运用生物育种手段,提高水稻品种抵御灾害气候的保障性措施,以及应对多变气候的水稻育种技术对策。

关键词：气候水稻品种育种技术

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基于人工神经网络的彩色摄像系统颜色信号失真的校正方法

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云南师范大学学报（自然科学版） 2000年第1期20卷 22-26页

作者：杨卫平彭兵余鸿飞廖宁放白凤翔石俊生朱云东云南师范大学物理系云南昆明650092 蒙自高等师范专科学校云南蒙自661100

本文为了提高彩色摄像系统对颜色信息的校正质量,改善彩色重现的效果,提出了一种基于人工神经网络的色彩校正方法。该方法利用神经网络的非线性变换的特点,实现RGB→XYZ变换或XYZ→RGB的变换。并对网络的学习、变换误差进行了分析。如... 详细信息

本文为了提高彩色摄像系统对颜色信息的校正质量,改善彩色重现的效果,提出了一种基于人工神经网络的色彩校正方法。该方法利用神经网络的非线性变换的特点,实现RGB→XYZ变换或XYZ→RGB的变换。并对网络的学习、变换误差进行了分析。如采用硬件的神经网络,可望实现实时校正。

关键词：神经网络色彩校正彩色摄像系统颜色信号失真

Analysis and external validation of a nomogram to predict peritoneal dissemination in gastric cancer

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Chinese Journal of Cancer Research 2020年第2期32卷 197-207页

作者： Xijie Chen shi Chen Xinyou Wang Runcong Nie Dongwen Chen Jun Xiang Yijia Lin Yingbo Chen junsheng Peng Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhou 510655China Guangdong Institute of Gastroenterology Guangzhou 510655China departm ent of Gastrointestinal Surgery The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhou 510655China Department of Gastric Surgery Sun Yat-sen University Cancer CenterGuangzhou 510060China

Objective:Peritoneal dissemination is difficult to diagnose by conventional imaging *** aimed to construct a nomogram to predict peritoneal dissemination in gastric cancer(GC)***:We retrospectively analyzed 1,112 GC patients in Sun Yat-sen University Cancer Center between2001 and 2010 as the development set and 474 patients from The Sixth Affiliated Hospital,Sun Yat-sen University between 2010 and 2016 as the validation *** clinicopathological variables associated with gastric cancer with peritoneal dissemination(GCPD)were *** used logistic regression analysis to identify independent risk factors for peritoneal ***,we constructed a nomogram for the prediction of GCPD and defined its predictive value with a receiver operating characteristic(ROC)*** validation was performed to validate the applicability of the ***:In total,250 patients were histologically identified as having peritoneal *** regression analysis demonstrated that age,sex,tumor location,tumor size,signet-ring cell carcinoma(SRCC),T stage,N stage and Borrmann classification IV(Borrmann IV)were independent risk factors for peritoneal *** constructed a nomogram consisting of these eight factors to predict GCPD and found an optimistic predictive capability,with a C-index of 0.791,an area under the curve(AUC)of 0.791,and a 95%confidence interval(95%CI)of *** results found in the external validation set were also ***:We constructed a highly sensitive nomogram that can assist clinicians in the early diagnosis of GCPD and serve as a reference for optimizing clinical management strategies.

关键词： Gastric cancer peritoneal dissemination nomogram

Effects of Xiaoyao San on exercise capacity and liver mitochondrial metabolomics in rat depression model

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Chinese Herbal Medicines 2024年第1期16卷 132-142页

作者： Weidi Zhao Cui Ji Jie Zheng shi Zhou junsheng Tian Yumei Han Xuemei Qin School of Physical Education Shanxi UniversityTaiyuan 030006China Institute of Biomedicine and Health Shanxi UniversityTaiyuan 030006China Physical Activity Sport and Exercise Research ThemeFaculty of HealthSouthern Cross UniversityLismore NSW2480Australia Modern Research Center for Traditional Chinese Medicine Shanxi UniversityTaiyuan 030006China School of Health Yantai Nanshan UniversityYantai 265706China

Objective: This study aimed to investigate the therapeutic effects of Xiaoyao San(XYS), a herbal medicine formula, on exercise capacity and liver mitochondrial metabolomics in a rat model of depression induced by chronic unpredictable mild stress(CUMS).Methods: A total of 24 male SD rats were randomly divided into four groups: control group(C), CUMS control group(M), Venlafaxine positive treatment group(V), and XYS treatment group(X). Depressive behaviour and exercise capacity of rats were assessed by body weight, sugar-water preference test, open field test, pole test, and rotarod test. The liver mitochondria metabolomics were analyzed by using liquid chromatography-mass spectrometry(LC-MS) method. TCMSP database and Gene Cards database were used to screen XYS for potential targets for depression, and GO and KEGG enrichment analyses were ***: Compared with C group, rats in M group showed significantly lower body weight, sugar water preference rate, number of crossing and rearing in the open field test, climbing down time in the pole test,and retention time on the rotarod test(P < 0.01). The above behaviors and exercise capacity indices were significantly modulated in rats in V and X groups compared with M group(P < 0.05, 0.01). Compared with C group, a total of 18 different metabolites were changed in the liver mitochondria of rats in M *** different metabolites and six metabolic pathways were regulated in the liver mitochondria of rats in X group compared with M group. The results of network pharmacology showed that 88 intersecting targets for depression and XYS were obtained, among which 15 key targets such as IL-1β, IL-6, and TNF were predicted to be the main differential targets for the treatment of depression. Additionally, a total of 1 553 GO signaling pathways and 181 KEGG signaling pathways were identified, and the main biological pathways were AGE-RAGE signaling pathway, HIF-1 signaling pathway, and calcium signaling ***

关键词： depression exercise capacity liver mitochondrial metabolomics Xiaoyao San

A nomogram to predict prognosis for gastric cancer with peritoneal dissemination

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Chinese Journal of Cancer Research 2018年第4期30卷 449-459页

作者： shi Chen Xijie Chen Runcong Nie Liying Ou Yang Aihong Liu Yuanfang Li Zhiwei Zhou Yingbo Chen junsheng Peng Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases the Sixth Affiliated Hospital of Sun Yat-sen University Department of Gastrointestinal Surgery the Sixth Affiliated Hospital of Sun Yat-sen University Department of Gastropancreatic Surgery Sun Yat-sen University Cancer Center Department of Intensive Care Sun Yat-sen University Cancer Center

Objective： To identify independent prognostic factors to be included in a nomogram to predict the prognosis ofgastric cancer patients with peritoneal ***： This is a retrospective study on 684 patients with a histological diagnosis of gastric cancer withperitoneal dissemination from the Sun Yat-sen University Cancer Center as the development set, and 62 gastriccancer patients from the Sixth Affiliated Hospital of Sun Yat-sen University as the validation group. Chi-square testand Cox regression analysis were used to compare the clinicopathological variables and the prognosis of gastriccancer patients with peritoneal dissemination. The Harrell＇s concordance index （C-index） and calibration curvewere determined for comparisons of predictive ability of the ***： Univariate and multivariate analyses showed that serum carcinoembryonic antigen （CEA） level（P=0.032）, ascites grading （P=0.008）, presence of extraperitoneal metastasis （P〈0.001）, seeding status （P=0.016） andperformance status （P=0.009） were independent prognostic factors for gastric cancer patients with peritonealdissemination in the development set. The nomogram model was constructed using these five factors. Internalvalidation showed that the C-index of the model was 0.641. For the external validation, the C-index of this modelwas ***： We developed and validated a nomogram to predict the prognosis for gastric cancer patients withperitoneal dissemination. This nomogram may play an important clinical role in guiding palliative therapy for thesetypes of patients, although it may need more data for optimization.

关键词： Gastric cancer prognosis peritoneal dissemination nomogram

Stretchable,skin-conformable neuromorphic system for tactile sensory recognizing and encoding

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InfoMat 2023年第12期5卷 87-99页

作者： Mengge Wu Qiuna Zhuang Kuanming Yao Jian Li Guangyao Zhao Jingkun Zhou Dengfeng Li Rui shi Guoqiang Xu Yingchun Li Zijian Zheng Zhihui Yang junsheng Yu Xinge Yu State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China(UESTC)Chengduthe People's Republic of China Department of Biomedical Engineering City University of Hong KongHong Kongthe People's Republic of China Laboratory for Advanced Interfacial Materials and Devices School of Fashion and TextilesThe Hong Kong Polytechnic UniversityHong Kongthe People's Republic of China Hong Kong Center for Cerebra-Cardiovascular Health Engineering Hong Kong Science ParkHong Kongthe People's Republic of China College of Science Harbin Institute of TechnologyShenzhenthe People's Republic of China Department of Pathology The Affiliated Hospital of Southwest Medical UniversityLuzhouthe People's Republic of China

Expanding wearable technologies to artificial tactile perception will be of significance for intelligent human-machine interface,as neuromorphic sensing devices are promising candidates due to their low energy consumption and highly effective operating ***-compatible and conformable features are required for the purpose of realizing wearable artificial tactile ***,we report an intrinsically stretchable,skin-integrated neuromorphic system with triboelectric nanogenerators as tactile sensing and organic electrochemical transistors as information *** integrated system provides desired sensing,synaptic,and mechanical characteristics,such as sensitive response(~0.04 kPa^(-1))to low-pressure,short-and long-term synaptic plasticity,great switching endurance(>10000 pulses),symmetric weight update,together with high stretchability of 100%*** neural encoding,demonstrations are capable of recognizing,extracting,and encoding features of tactile *** work provides a feasible approach to wearable,skin-conformable neuromorphic sensing system with great application prospects in intelligent robotics and replacement prosthetics.

关键词： neural encoding neuromorphic sensing system organic electrochemical transistors tactile sensation triboelectric nanogenerators

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基于三维离散元的大直径钢圆筒下沉侧摩阻力

华南理工大学学报（自然科学版） 2020年第4期48卷 15-27页

作者：丁小彬施钰陈俊生华南理工大学土木与交通学院广东广州510640 华南理工大学亚热带建筑科学国家重点实验室广东广州510640

基于三维离散元方法(DEM),采用颗粒流程序(PFC3D)对大直径钢圆筒在砂土中的贯入过程进行了数值模拟分析。分别建立了基于离心机原理的缩尺模型和调整细观参数的足尺模型,分析了圆筒贯入过程中的侧壁摩阻力分布以及土颗粒间的接触关系。... 详细信息

基于三维离散元方法(DEM),采用颗粒流程序(PFC3D)对大直径钢圆筒在砂土中的贯入过程进行了数值模拟分析。分别建立了基于离心机原理的缩尺模型和调整细观参数的足尺模型,分析了圆筒贯入过程中的侧壁摩阻力分布以及土颗粒间的接触关系。将数值结果与理论值、相关试验现象进行对比,验证了离散元模型的有效性。通过进一步的参数分析,研究了不同细观参数对侧摩阻力的影响。研究发现:与桩的贯入机制不同,大直径钢圆筒下沉过程中几乎没有土塞效应;内侧摩阻力接近总侧摩阻力的一半,侧摩阻力均存在侧阻疲劳效应;与缩尺模型相比,调整细观参数的足尺模型有更高的计算效率;细观参数与宏观反应存在密切联系。

关键词：离散元方法数值模拟大直径钢圆筒侧摩阻力