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Lightweight detection method for lotus seedpod in natural environment

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International Journal of Agricultural and Biological Engineering 2023年第6期16卷 197-206,F0004页

作者： Tao Tang Xu Wang Zenghong Ma weiwei hong Gaohong Yu Bingliang Ye Faculty of Mechanical Engineering Zhejiang Sci-Tech UniversityHangzhou 310018China Key Laboratory of Transplanting Equipment and Technology of Zhejiang Province Hangzhou 310018China Special Equipment Institute Hangzhou Vocational&Technical CollegeHangzhou 310018China

In order to solve the problems of the current target detection algorithms,such as poor discrimination of occluded targets,multiple parameters,complex networks,large amounts of computation,and not conducive to the deployment of mobile terminals,a lightweight lotus seedpod detection method based on YOLOv5s model was proposed in this ***,the dataset was augmented by using a combination of offline and online augmentation,which improved the adaptability and robustness of the model in complex ***,a lightweight Ghost convolution module was introduced to replace the original convolution,and a lightweight bidirectional feature pyramid network was designed,which could enhance the feature extraction and fusion capability of the network and reduce the amount of calculation and model size;On this basis,the combination of WIoU loss function and Mish activation function was adopted to improve the accuracy of feature ***,the knowledge distillation training strategy was used to ensure the proposed lightweight model has the learning ability of a complex network model,improving the recall and precision of model *** results of the ablation study show that the proposed method effectively improves the detection performance of the YOLOv5s model for lotus *** mean average precision of the improved model was 89.7%,compared with the original YOLOv5s model increased by 2.8%,and the parameters and FLOPs were reduced by 2.36M and 7.3G,*** with other detection algorithm models,the proposed algorithm model has the advantages of less computation,smaller model size,and higher detection ***,the proposed improved optimization method based on the YOLOv5s model can effectively detect lotus seedpods,which provides theoretical research and technical support for intelligent picking of lotus seedpods in the actual operating environment.

关键词： lotus seedpod detection deep Learning data augmentation lightweight knowledge distillation natural environment

Inhibitory Effect of Arsenic Trioxide on Growth and Telomerase Activity of SMMC-7721 and BEL-7402 Hepatocarcinoma Cells and Determination of their GSH Content

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Chinese Journal of Clinical Oncology 2006年第3期3卷 207-211页

作者： weiwei Ren hong Li Yuan Zhang Department of Pathophysiology and Institute of Hematology Medical College of Jinan University Guangzhou 510632China.

OBJECTIVE To explore the inhibitory effect of arsenic trioxide on growth and telomerase activity of BEL-7402 and SMMC-7721 hepatocarcinoma cells, and to measure their GSH level. METHODS Cell culture and trypan blue exclusion were used to examine the inhibitory effect of arsenic trioxide on BEL-7402 and SMMC-7721 hepatocarcinoma lines. A GSH kit and telomerase kit were used to mearsure the GSH content in cells and telomerase activity. RESULTS The growth of BEL-7402 cells was significantly inhibited at a level of 0.50μmol/L of arsenic trioxide by 24 h. The inhibitory effect increased with time and concetration of arsenic trioxide. The telomerase activity of BEL-7402 cells was also significantly inhibited at a level of 0.50μmol/L of arsenic trioxide by 24 h, after which the inhibitory effect increased with time. On the other hand, at 24 h of incubation a level of 2.00 μmol/L of arsenic trioxide was required to significantly inhibit growth of SMMC-7721 cells, and only after 48 h with 2.00μmol/L of arsenic trioxide did telomerase activity significantly decline. The GSH content of the BEL-7402 and SMMC-7721 cells was 18.7±1.4 and 50.8±5.2 nmol/mg protein respectively, a significant difference. CONCLUSION Different concentrations of arsenic trioxide are required to inhibit growth and telomerase activity of SMMC-7721 and BEL-7402 cells. Perhaps BEL-7402 cells are more sensitive to arsenic trioxide because of their low level of GSH content, which results in a low capacity for oxidation-reduction and poorer detoxification mechanisms in BEL-7402 cells.

关键词： arsenic trioxide growth telomerase hepatocarcinoma.

Gut flora in multiple sclerosis:implications for pathogenesis and treatment

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Neural Regeneration Research 2024年第7期19卷 1480-1488页

作者： weiwei Zhang Ying Wang Mingqin Zhu Kangding Liu hong-Liang Zhang Department of Neurology the First Hospital of Jilin UniversityJilin UniversityChangchunJilin ProvinceChina Department of Life Sciences National Natural Science Foundation of ChinaBeijingChina

Multiple sclerosis is an inflammatory disorder chara cterized by inflammation,demyelination,and neurodegeneration in the central nervous *** current first-line therapies can help manage symptoms and slow down disease progression,there is no cure for multiple *** gut-brain axis refers to complex communications between the gut flo ra and the immune,nervous,and endocrine systems,which bridges the functions of the gut and the *** in the gut flora,termed dys biosis,can lead to systemic inflammation,leaky gut syndrome,and increased susceptibility to *** pathogenesis of multiple sclerosis involves a combination of genetic and environmental factors,and gut flora may play a pivotal role in regulating immune responses related to multiple scle *** develop more effective therapies for multiple scle rosis,we should further uncover the disease processes involved in multiple sclerosis and gain a better understanding of the gut-brain *** review provides an overview of the role of the gut flora in multiple scle rosis.

关键词： gut flora gut-brain axis multiple sclerosis pathogenesis treatment

嘉兴市大气NO_(2)对呼吸系统疾病门诊量的影响分析

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中国医院统计 2024年第3期31卷 189-192,196页

作者：洪伟伟吴益康朱泽王熙蓓吴大明周哲华嘉兴市疾病预防控制中心环境与健康科(职业健康与辐射防护科) 浙江嘉兴314050

目的分析嘉兴市大气NO_(2)对呼吸系统疾病门诊量的影响。方法收集2019—2021年嘉兴市每日大气NO_(2)监测资料、气象资料和呼吸系统疾病门诊量资料。分别应用Wilcoxon秩和检验和广义相加模型(GAM)2种统计方法,研究大气NO_(2)对呼吸系... 详细信息

目的分析嘉兴市大气NO_(2)对呼吸系统疾病门诊量的影响。方法收集2019—2021年嘉兴市每日大气NO_(2)监测资料、气象资料和呼吸系统疾病门诊量资料。分别应用Wilcoxon秩和检验和广义相加模型(GAM)2种统计方法,研究大气NO_(2)对呼吸系统疾病门诊量的急性效应。结果期间大气NO_(2)日均浓度超标9 d。大气NO2超标日的呼吸系统疾病门诊总量和儿童呼吸系统疾病门诊量均高于达标日。单日滞后效应分析时,NO_(2)对呼吸系统疾病门诊总量和成人门诊量的滞后效应值均在lag4时达到最大,而儿童门诊量则在lag3时达到最大。NO2每增加10μg/m^(3),呼吸系统疾病门诊总量、成人和儿童门诊量分别增加2.23%(95%CI:1.52%~2.94%)、1.73%(95%CI:1.06%~2.41%)和2.73%(95%CI:1.73%~3.74%);累积滞后效应分析时,呼吸系统疾病门诊量效应值均在lag07时达到最大,NO2每增加10μg/m^(3),呼吸系统疾病门诊总量、成人和儿童呼吸系统疾病门诊量分别增加5.35%(95%CI:4.06%~6.66%)、3.47%(95%CI:2.25%~4.70%)和7.17%(95%CI:5.31%~9.07%);儿童门诊量的最大效应值高于成人。结论嘉兴市大气NO_(2)浓度升高可能引起呼吸系统疾病门诊量增加,且具有滞后性,应特别加强儿童呼吸系统的健康防护。

关键词：二氧化氮呼吸系统疾病门诊量 Wilcoxon秩和检验广义相加模型

2018—2022年嘉兴市孕妇碘营养监测结果分析

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中国地方病防治 2024年第4期39卷 295-298页

作者：王熙蓓周哲华朱泽洪伟伟胡赞向泽林嘉兴市疾病预防控制中心浙江314050

目的了解浙江省嘉兴市2018—2022年孕妇盐碘和尿碘水平,为指导孕妇科学补碘提供参考依据。方法2018—2022年,分别在嘉兴市7个县(市、区)随机抽取5个乡镇(街道),每个乡镇(街道)抽取21名孕妇,采集其家中食用盐样和随机尿样,分别进行尿碘... 详细信息

目的了解浙江省嘉兴市2018—2022年孕妇盐碘和尿碘水平,为指导孕妇科学补碘提供参考依据。方法2018—2022年,分别在嘉兴市7个县(市、区)随机抽取5个乡镇(街道),每个乡镇(街道)抽取21名孕妇,采集其家中食用盐样和随机尿样,分别进行尿碘和盐碘的定量检测。结果2018—2022年嘉兴市共采集孕妇盐样4249份,盐碘中位数为23.3 mg/kg,碘盐覆盖率为88.1%,合格碘盐食用率为83.9%;不同年份和地区孕妇盐碘中位数差异均具有统计学意义(P<0.05)。共检测孕妇尿样4249份,尿碘中位数为129.9μg/L,碘缺乏占59.6%,碘营养适宜占26.3%,碘营养超适宜占12.1%,碘营养过量占2%。仅2022年孕妇碘盐覆盖率和合格碘盐食用率均高于90%,孕妇尿碘中位数达到碘营养适宜水平。不同地区、年龄、孕期和食盐类型的孕妇尿碘均低于碘营养适宜水平,各组间孕妇尿碘中位数差异均具有统计学意义(P<0.05)。结论2018—2022年嘉兴市孕妇碘营养总体未达到适宜水平,存在碘摄入不足的风险,需加强对孕妇科学补碘宣教,持续开展孕妇碘营养监测,制定合理有效的补碘防控策略,提高孕妇碘营养水平。

关键词：孕妇盐碘尿碘碘营养

Spatial-temporal population dynamics of the critically endangered Blue-crowned Laughingthrush Pterorhinus courtoisi:a 22-year longitudinal study

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Science China(Life Sciences) 2024年第8期67卷 1769-1771页

作者： Tao Liu Jutao He Chang Xiao Jie Liu Jie Sun Minling Li Yuanhua hong weiwei Zhang Fuwen Wei Jiangxi Provincial Key Laboratory of Conservation Biology Jiangxi Agricultural UniversityNanchang 330045China Forestry Bureau of Wuyuan Shangrao 333299China

Dear Editor,Population size is a crucial indicator in evaluating the conservation status of a *** the patterns of population fluctuation and the distribution range of endangered species is important for biodiversity c... 详细信息

关键词： Population crown dynamics

SWG: an architecture for sparse weight gradient computation

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Science China(Information Sciences) 2024年第2期67卷 302-321页

作者： weiwei WU Fengbin TU Xiangyu LI Shaojun WEI Shouyi YIN School of Integrated Circuits Tsinghua University Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology

On-device training for deep neural networks(DNN) has become a trend due to various user preferences and scenarios. The DNN training process consists of three phases, feedforward(FF), backpropagation(BP), and weight gradient(WG) update. WG takes about one-third of the computation in the whole training process. Current training accelerators usually ignore the special computation property of WG and process it in a way similar to FF/BP. Besides, the extensive data sparsity existing in WG, which brings opportunities to save computation, is not well explored. Nevertheless, exploiting the optimization opportunities would meet three underutilization problems, which are caused by(1) the mismatch between WG data dimensions and hardware parallelism,(2) the full sparsity, i.e., the sparsity of feature map(Fmap),error map(Emap), and gradient, and(3) the workload imbalance resulting from irregular sparsity. In this paper, we propose a specific architecture for sparse weight gradient(SWG) computation. The architecture is designed based on hierarchical unrolling and sparsity-aware(HUSA) dataflow to exploit the optimization opportunities of the special computation property and full data sparsity. In HUSA dataflow, the data dimensions are unrolled hierarchically on the hardware architecture. A valid-data trace(VDT) mechanism is embedded in the dataflow to avoid the underutilization caused by the two-sided input sparsity. The gradient is unrolled in PE to alleviate the underutilization induced by output sparsity while maintaining the data reuse opportunities. Besides, we design an intra-and inter-column balancer(IIBLC) to dynamically tackle the workload imbalance problem resulting from the irregular sparsity. Experimental results show that with HUSA dataflow exploiting the full sparsity, SWG achieves a speedup of 12.23× over state-of-the-art gradient computation architecture, Train Ware. SWG helps to improve the energy efficiency of the state-of-the-art training accelerator LNPU from

关键词： CNN training gradient computation sparsity architecture

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顾及结构和几何特征的道路自动选取方法

武汉大学学报（信息科学版） 2017年第4期42卷 520-524页

作者：曹炜威张红何晶蓝天西南交通大学地球科学与环境工程学院四川成都611756 西南交通大学经济管理学院四川成都611756

提出了一种顾及结构和几何特征的道路网自动选取方法。综合考虑道路的度中心性、集聚系数和路划的几何长度等道路选取影响因素,提出一种道路重要性评价方法。实验结果表明,本文方法能够很好地保持选取道路网的整体与局部结构、拓扑结构... 详细信息

提出了一种顾及结构和几何特征的道路网自动选取方法。综合考虑道路的度中心性、集聚系数和路划的几何长度等道路选取影响因素,提出一种道路重要性评价方法。实验结果表明,本文方法能够很好地保持选取道路网的整体与局部结构、拓扑结构以及路网连通性。基于该方法,由大比例尺地图选取出的小比例尺地图与相应标准比例尺地图保持较高的一致性,表明该方法是稳定可靠的。

关键词：道路选取集聚系数度中心性路划长度地图综合

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电力载波多联机空调通信系统的设计与开发

计算机应用 2016年第8期36卷 2187-2191,2196页

作者：洪为伟徐政清华大学深圳研究生院电力系统国家重点实验室深圳研究室广东深圳518055

为了降低多联机空调系统的成本、简化安装工程,采用电力线载波通信技术构建了多联机空调的通信系统。首先根据系统控制的通信需求提出了基于窄带电力线通信技术的解决方案;然后主要从信道接入控制和组网控制两方面设计了包括物理层、介... 详细信息

为了降低多联机空调系统的成本、简化安装工程,采用电力线载波通信技术构建了多联机空调的通信系统。首先根据系统控制的通信需求提出了基于窄带电力线通信技术的解决方案;然后主要从信道接入控制和组网控制两方面设计了包括物理层、介质访问控制(MAC)层、网络层和应用层的四层通信协议集,提出了基于载波侦听多路访问/冲突避让(CSMA/CA)设计思想的三种信道接入算法以及星型网络拓扑的组网算法;最后对11节点多联机空调系统进行了组网测试、正常通信测试和抗干扰测试。测试结果表明所提算法及方案能够满足多联机空调系统的实时控制要求,并具有较强的抗干扰能力;另外,所设计的通信协议具有开放性,可以根据需求进行修改,应用于智能家居等短距离无中继的实时控制领域。

关键词：多联机空调系统电力载波通信通信协议载波侦听多路访问/冲突避让算法组网