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中国传统茶馆在现代社区及养老模式中的应用

山西建筑 2024年第1期50卷 28-31页

作者：王文铮王虞心浙江浙建建筑设计有限公司浙江金华321200 山东科技大学山东青岛266590

中国传统茶馆在其时代背景下具备生活服务、邻里社交、休闲娱乐等定位功能,将其与现代社区及社区养老模式相结合,解决现存社区问题,补充现代社区中缺失的邻里互动、社区情感、交往空间诸多要素。

关键词：茶馆生活方式社交功能养老模式

顺序法纯单孔腔镜保乳术治疗不同象限早期乳腺癌的疗效研究

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中国修复重建外科杂志 2024年第7期38卷 793-800页

作者：周千贺刘健宇王文政李英谱李志高哈尔滨医科大学附属肿瘤医院乳腺外科哈尔滨150081

目的比较顺序法纯单孔腔镜保乳术(sequential method pure single-port lumpectomy-breast conserving surgery,SMPSL-BCS)治疗早期乳腺癌时,不同象限肿瘤患者的疗效差异。方法回顾分析2023年1月—12月收治且符合选择标准的200例早期乳... 详细信息

目的比较顺序法纯单孔腔镜保乳术(sequential method pure single-port lumpectomy-breast conserving surgery,SMPSL-BCS)治疗早期乳腺癌时,不同象限肿瘤患者的疗效差异。方法回顾分析2023年1月—12月收治且符合选择标准的200例早期乳腺癌女性患者临床资料。根据肿瘤所在象限,患者分为外上象限组(外上组)、外下象限组(外下组)、内上象限组(内上组)、内下象限组(内下组),每组50例。4组患者年龄、身体质量指数、吸烟史、婚姻状况、合并症、病变乳房侧别、超声检查肿瘤最大直径、病理检查肿瘤最大直径、临床分期、分子分型及病程等基线资料比较,差异均无统计学意义(P>0.05)。记录并比较4组手术时间、术中出血量、术后引流量、拔管时间,术后早期并发症(1~3个月,拔管后皮下积液、切口感染、浅表皮肤灼伤)、远期并发症(>3个月,皮瓣胸大肌粘连、乳房外观和形状改变、感觉不适)发生情况,术后6个月对保乳手术美容效果评级。结果手术时间外上组最短,其次为内上组、外下组,内下组最长,组间差异均有统计学意义(P0.05)外,其余组间比较差异均有统计学意义(P0.05)外,其余组间比较差异均有统计学意义(P0.05)。术后远期,内下组皮瓣胸大肌粘连、乳房外观和形状改变发生率高于外上组、外下组,感觉不适发生率高于外上组,差异均有统计学意义(P0.05)。术后6个月保乳手术美容效果评价,外上组、外下组、内上组保乳手术美容效果明显优于内下组(P0.05)。结论SMPSL-BCS治疗早期乳腺癌时,肿瘤位于外上象限患者效果最佳,外下、内上象限患者效果类似,内下象限患者效果不具备显著优势且建议不作为首选术式。

关键词：乳腺癌顺序法纯单孔腔镜保乳术导丝定位肿瘤位置

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Experimental and numerical study of a gas cyclone with a central filter

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Particuology 2022年第4期20卷 47-59页

作者： Zihui Zhang Sijie Dong Kejun Dong Li'an Hou wenzheng wang Yi Wei Bo wang Key Laboratory of Western China's Environmental Systems(Ministry of Education)and Engineering Research Center of Fine Particles Pollution Control Technology and Equipment of Gansu Province College of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000China Centre for Infrastructure Engineering School of EngineeringWestern Sydney UniversityPenrithNSW 2751Australia Xi'an High-Tech Institute Xi'an 710025China Gansu Chemical Industry Research Institute Co. Ltd.Lanzhou 730000China

This paper studies a novel gas cyclone with a cylindrical fiter face installed in the center from the vortex finder to the bottom *** experimental results show that this composite cyclone has a higher collection fficiency and a lower pressure drop than the original *** mechanisms for the improvement are analyzed by both physical experiments and numerical *** measuring dust samples collected at different places it is revealed that the center filter can prevent fine particles from entering the inner vortex and escaping,which accounts for the increase of the collection *** addition,the flow field of the composite cyclone is simulated by computational fluid dynamics and compared with that of the original *** analysis shows that with the filter layer installed,the swirling flow disappears in the vortex finder,which decreases the kinetic energy dissipation and hence lowers the pressure drop.

关键词： Cyclone Filtration Porous media model Collection efficiency Pressure drop

限水条件下灌水量对强筋小麦旗叶衰老特性和籽粒产量的影响

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麦类作物学报 2024年第4期44卷 453-461页

作者：毕经鑫李清瑶蔡瑞国王文政杨敏郭振清张敏河北科技师范学院农学与生物科技学院河北省作物逆境生物学重点实验室河北昌黎066004

为探究灌水量对强筋小麦花后旗叶衰老和籽粒产量的调控效应,以2个强筋小麦品种(中麦998和中麦1062)为供试材料,设置0 m^(3)·hm^(-2)(W_(0))、450 m^(3)·hm^(-2)(W_(1))和900 m^(3)·hm^(-2)(W_(2))3个灌水量(拔节期和开花期各灌水50%)... 详细信息

为探究灌水量对强筋小麦花后旗叶衰老和籽粒产量的调控效应,以2个强筋小麦品种(中麦998和中麦1062)为供试材料,设置0 m^(3)·hm^(-2)(W_(0))、450 m^(3)·hm^(-2)(W_(1))和900 m^(3)·hm^(-2)(W_(2))3个灌水量(拔节期和开花期各灌水50%),分析了不同处理下小麦旗叶叶绿素含量、同化物含量、丙二醛含量、抗氧化酶活性、抗衰老激素含量、蛋白质含量和籽粒产量的差异。结果表明,增加灌水量可延缓强筋小麦花后旗叶衰老。灌浆前中期旗叶叶绿素含量在不同处理间无显著差异,灌浆后期叶绿素含量在W_(2)处理下最高。W_(2)处理下小麦旗叶可溶性糖含量显著高于其他处理;旗叶可溶性蛋白含量在花后0~21 d保持较高水平,在花后21~35 d含量逐渐下降,且W_(1)处理下花后21~35 d旗叶可溶性蛋白含量较W_(0)处理显著提高。灌水量对花后0~21 d强筋小麦旗叶中游离氨基酸含量无显著影响,而在灌浆后期以W_(2)处理最高;与W_(0)处理相比,增加灌水量可显著提高旗叶过氧化氢酶活性、过氧化物酶活性和生长素含量,显著降低丙二醛和脱落酸含量,并且显著延长测定酶活性和激素含量峰值出现时间。随灌水量的增加,籽粒蛋白质含量下降,但产量显著升高。总体来看,在本试验条件下,W_(2)处理(拔节水450 m^(3)·hm^(-2)+开花水450 m^(3)·hm^(-2))能够显著延缓强筋小麦旗叶衰老,在维持较高蛋白质含量同时,获得最高籽粒产量。

关键词：强筋小麦旗叶衰老特性籽粒产量

施氮量对强筋小麦光合、产量、蛋白质含量和加工品质的影响

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麦类作物学报 2024年第4期44卷 462-471页

作者：王文政李亚静张敏毕经鑫杨敏郭振清蔡瑞国河北省作物逆境生物学重点实验室河北科技师范学院农学与生物科技学院河北昌黎066600

为探究冀东地区强筋小麦适宜施氮量,以强筋小麦石优20号和中麦998为材料,通过大田试验设置0 kg·hm^(-2)(N_(0))、180 kg·hm^(-2)(N 180)、210 kg·hm^(-2)(N 210)和240 kg·hm^(-2)(N 240)4个施氮水平,分析了施氮量对强筋小麦光合、... 详细信息

为探究冀东地区强筋小麦适宜施氮量,以强筋小麦石优20号和中麦998为材料,通过大田试验设置0 kg·hm^(-2)(N_(0))、180 kg·hm^(-2)(N 180)、210 kg·hm^(-2)(N 210)和240 kg·hm^(-2)(N 240)4个施氮水平,分析了施氮量对强筋小麦光合、产量、蛋白质含量和加工品质的影响。结果表明,与N_(0)处理相比,施氮后石优20号和中麦998的产量均在N 240处理下增加显著,增幅分别为3.20%和13.95%。随施氮量的增加,小麦旗叶叶绿素含量和光合参数均呈先升后降趋势,且在花后15 d达到最大值。施氮对F v/F m影响较小,对ΦPSⅡ影响较明显。旗叶、籽粒内硝酸还原酶和谷氨酰胺合成酶均随施氮量的增加呈先升后降趋势。增施氮肥后籽粒蛋白组分中清蛋白、球蛋白比例下降,醇溶蛋白、谷蛋白比例上升,各组分含量在N 210处理下均最高。面筋含量、沉降值、形成时间和稳定时间均随施氮量的增加先升后降。这说明增施氮肥可改善強筋小麦植株的光合特性,进而提高产量,同时增加植株体内氮代谢相关酶活性和籽粒蛋白质含量并改变蛋白质组分所占比例,有效改善加工品质。本试验条件下,210 kg·hm^(-2)施氮量下,小麦产量和品质较优,该施氮量可作为冀东平原强筋小麦栽培的最佳施氮量。

关键词：施氮量强筋小麦光合产量蛋白质含量加工品质

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Calculation and Analysis of TVMS Considering Profile Shifts and Surface Wear Evolution Process of Spur Gear

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Chinese Journal of Mechanical Engineering 2024年第3期37卷 136-150页

作者： wenzheng Liu Rupeng Zhu Wenguang Zhou Jingjing wang College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjingChina

Profile shift is a highly effective technique for optimizing the performance of spur gear transmission ***,tooth surface wear is inevitable during gear meshing due to inadequate lubrication and long-term *** profile shift and tooth surface wear(TSW)can impact the meshing characteristics by altering the involute tooth *** this study,a tooth stiffness model of spur gears that incorporates profile shift,TSW,tooth deformation,tooth contact deformation,fillet-foundation deformation,and gear body structure coupling is *** model efficiently and accurately determines the time-varying mesh stiffness(TVMS).Additionally,an improved wear depth prediction method for spur gears is developed,which takes into consideration the mutually prime teeth numbers and more accurately reflects actual gear meshing *** show that consideration of the mutual prime of teeth numbers will have a certain impact on the TSW ***,the finite element method(FEM)is employed to accurately verify the values of TVMS and load sharing ratio(LSR)of profile-shifted gears and worn *** study quantitatively analyzes the effect of profile shift on the surface wear process,which suggests that gear profile shift can partially alleviate the negative effects of *** contribution of this study provides valuable insights into the design and maintenance of spur gear systems.

关键词： Profile shift Tooth surface wear Structure coupling effect Improved wear depth prediction method TVMS

Graph neural network based method for robot path planning

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Biomimetic Intelligence & Robotics 2024年第1期4卷 80-87页

作者： Xingrong Diao wenzheng Chi Jiankun wang Shenzhen Key Laboratory of Robotics Perception and Intelligence Department of Electronic and Electrical EngineeringSouthern University of Science and TechnologyShenzhen 518055China Robotics and Microsystems Center School of Mechanical and Electric EngineeringSoochow UniversitySuzhou 215021China Jiaxing Research Institute Southern University of Science and TechnologyJiaxing 314000China

Sampling-based path planning is widely used in robotics,particularly in high-dimensional state *** the path planning process,collision detection is the most time-consuming ***,we propose a learning-based path planning method that reduces the number of collision *** develop an efficient neural network model based on graph neural *** model outputs weights for each neighbor based on the obstacle,searched path,and random geometric graph,which are used to guide the planner in avoiding *** evaluate the efficiency of the proposed path planning method through simulated random worlds and real-world *** results demonstrate that the proposed method significantly reduces the number of collision checks and improves the path planning speed in high-dimensional environments.

关键词： Graph Neural Network(GNN) Collision detection Sampling-based path planning

Compressive sensing based multiuser detector for massive MBM MIMO uplink

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Journal of Systems Engineering and Electronics 2020年第1期31卷 19-27页

作者： SONG Wei wang wenzheng School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China School of Electronics Engineering and Computer Science Peking UniversityBeijing 100871China

Media based modulation(MBM)is expected to be a prominent modulation scheme,which has access to the high data rate by using radio frequency(RF)mirrors and fewer transmit *** with multiuser multiple input multiple output(MIMO),the MBM scheme achieves better performance than other conventional multiuser MIMO *** this paper,the massive MIMO uplink is considered and a conjunctive MBM transmission scheme for each user is *** conjunctive MBM transmission scheme gathers aggregate MBM signals in multiple continuous time slots,which exploits the structured sparsity of these aggregate MBM *** this kind of scenario,a multiuser detector with low complexity based on the compressive sensing(CS)theory to gain better detection performance is *** detector is developed from the greedy sparse recovery technique compressive sampling matching pursuit(CoSaMP)and exploits not only the inherently distributed sparsity of MBM signals but also the structured sparsity of multiple aggregate MBM *** exploiting these sparsity,the proposed CoSaMP based multiuser detector achieves reliable detection with low *** results demonstrate that the proposed CoSaMP based multiuser detector achieves better detection performance compared with the conventional methods.

关键词： media based modulation(MBM) radio frequency(RF)mirror compressive sensing(CS) multiple input multiple output(MIMO) multiuser detector compressive sampling matching pursuit(CoSaMP).

A Distributed Self-Tallying Electronic Voting System Using the Smart Contract

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Chinese Journal of Electronics 2024年第4期33卷 1063-1076页

作者： Jingyu YAO Bo YANG Tao wang wenzheng ZHANG School of Computer Science Shaanxi Normal University State Key Laboratory of Integrated Services Networks Xidian University Science and Technology on Communication Security Laboratory

For electronic voting(e-voting) with a trusted authority, the ballots may be discarded or tampered, so it is attractive to eliminate the dependence on the trusted party. An e-voting protocol, where the final voting result can be calculated by any entity, is known as self-tallying e-voting protocol. To the best of our knowledge, addressing both abortive issue and adaptive issue simultaneously is still an open problem in self-tallying e-voting *** Ethereum blockchain with cryptographic technologies, we present a decentralized self-tallying e-voting protocol. We solve the above problem efficiently by utilizing optimized Group Encryption Scheme and standard Exponential El Gamal Cryptosystem. We use zero-knowledge proof and homomorphic encryption to protect votes' secrecy and achieve self-tallying. All ballots can be verified by anyone and the final voting result can be calculated by any entity. In addition, using the paradigm of score voting and “1-out-of-k” proof, our e-voting system is suitable for a wide range of application scenarios. Experiments show that our protocol is more competitive and more suitable for large-scale voting.

关键词： Electronic voting systems Smart contracts Blockchains Cryptocurrency Electronic voting Homomorphic encryption Standards