Stem Reserve Mobilization and Sink Activity in Wheat under Drought Conditions

The effect of water deficit on stem reserve mobilization and sink activity in wheat (Triticum aestivum L.) cultivars, viz., C306 (drought tolerant) and PBW343 (drought sensitive) was studied. Drought was maintained in pot raised plants by withholding irrigation at 95 days after sowing (DAS), i.e. just five days before the initiation of anthesis. Drought induced a significant reduction in mean biomass of all the internodes of sensitive cultivar as compared to those of tolerant one. Mobilized dry matter and mobilization efficiency were observed to be higher in the internodes of tolerant cultivar, both under control and stress conditions, which resulted in enhanced translocation of stem reserves to the grains. Water soluble carbohydrates (WSC), which mainly occur as fructans, were observed to be higher in the internodes of tolerant cultivar than those of sensitive one. When drought was applied, fructans were mobilized more effectively from the internodes of tolerant cultivar. A significantly higher sucrose synthase activity in the grains of tolerant cultivar, under drought conditions, increased the sink strength by unloading the assimilates in the sink, thereby increasing further mobilization of assimilates to the grains. Grains of sensitive cultivar attained maturity much earlier as compared to the tolerant one, both under control and stress conditions. The longer duration of grain maturation in tolerant cultivar supported enhanced mobilization of stem reserves, thus restricting heavy decrease in grain yield, under stress conditions, as compared to the sensitive cultivar. It may, therefore, be concluded that certain characteristics viz., enhanced capability of fructan storage, higher mobilization efficiency, stronger sink activity and longer duration of grain maturation might help the drought tolerant cultivar in coping the stress

Task-Oriented Topology System Synthesis of Reconfigurable Legged Mobile Lander Integrating Active and Passive Metamorphoses

To explore hostile extraterrestrial landforms and construct an engineering prototype,this paper presents the task-oriented topology system synthesis of reconfigurable legged mobile lander(ReLML)with three operation modes from adjusting,landing,to roving.Compared with our preceding works,the adjusting mode with three rotations(3R)provides a totally novel exploration approach to geometrically matching and securely arriving at complex terrains dangerous to visit currently;the landing mode is redefined by two rotations one translation(2R1T),identical with the tried-and-tested Apollo and Chang'E landers to enhance survivability via reasonable touchdown buffering motion;roving mode also utilizes 2R1T motion for good motion and force properties.The reconfigurable mechanism theory is first brought into synthesizing legged mobile lander integrating active and passive metamorphoses,composed of two types of metamorphic joints and metamorphic execution and transmission mechanisms.To reveal metamorphic principles with multiple finite motions,the finite screw theory is developed to present the procedure from unified mathematical representation,modes and source phase derivations,metamorphic joint and limb design,to final structure assembly.To identify the prototype topology,the 3D optimal selection matrix method is proposed considering three operation modes,five evaluation criteria,and two topological subsystems.Finally,simulation verifies the whole task implementation process to ensure the reasonability of design.

Study of the intensive care unit activity scale in the early rehabilitation of patients after direct cardiac surgery

BACKGROUND Direct cardiac surgery often necessitates intensive post-operative care,and the intensive care unit(ICU)activity scale represents a crucial metric in assessing and guiding early rehabilitation efforts to enhance patient recovery.AIM To clarify the clinical application value of the ICU activity scale in the early recovery of patients after cardiac surgery.METHODS One hundred and twenty patients who underwent cardiac surgery between September 2020 and October 2021 were selected and divided into two groups using the random number table method.The observation group was rated using the ICU activity scale and the corresponding graded rehabilitation interventions were conducted based on the ICU activity scale.The control group was assessed in accordance with the routine rehabilitation activities,and the postoperative rehabilitation indexes of the patients in both groups were compared(time of tracheal intubation,time of ICU admission,occurrence of complications,and activity scores before ICU transfer).The two groups were compared according to postoperative rehabilitation indicators(time of tracheal intubation,length of ICU stay,and occurrence of complications)and activity scores before ICU transfer.RESULTS In the observation group,tracheal intubation time lasted for 18.30±3.28 h and ICU admission time was 4.04±0.83 d,which were significantly shorter than the control group(t-values:2.97 and 2.038,respectively,P<0.05).The observation group also had a significantly lower number of complications and adverse events compared to the control group(P<0.05).Before ICU transfer,the observation group(6.7%)had few complications and adverse events than the control group(30.0%),and this difference was statistically significant(P<0.05).Additionally,the activity score was significantly higher in the observation(26.89±0.97)compared to the control groups(22.63±1.12 points)(t-value;-17.83,P<0.05).CONCLUSION Implementation of early goal-directed activities in patients who underwent cardiac surgery using the ICU activity scale can promote the recovery of cardiac function.

Application Effect of External Diaphragm Pacemaker Combined with Active Respiratory Circulation Technology in Pulmonary Rehabilitation of Perioperative Lung Cancer Patients

Aim: To explore the application effect of external diaphragm pacemaker combined with active respiratory circulation technology in pulmonary rehabilitation of perioperative lung cancer patients. Methods: A total of 98 lung cancer patients admitted to our hospital from April 2020 to November 2021 were selected as the observation objects, and then divided into a control group and an observation group using the random number table method, with 49 cases in each group. The control group received routine admission guidance and active respiratory circulation training, while the observation group was supplemented with external diaphragm pacemaker on the basis of the control group. The intervention effect was evaluated by blood gas indicators, pulmonary function indicators, diaphragm function indicators, sputum comfort degree, and activity tolerance indicators before and after intervention. Results: Before intervention, there were no significant differences in blood gas analysis indicators, pulmonary function indicators, diaphragm function indicators, sputum comfort degree, and activity tolerance indicators between the two groups (P > 0.05). After intervention, the improvement degree of the above indicators in the observation group was higher than that in the control group (P < 0.05). Conclusions: The application of external diaphragm pacemaker combined with active respiratory circulation technology in pulmonary rehabilitation of perioperative lung cancer patients is significant, which can effectively improve the pulmonary function, blood gas function, and diaphragm function of lung cancer patients after surgery, and improve the activities of daily living and quality of life of patients.

P48-Triggered transmembrane signaling transduction of human monocytes:mobilization of calcium ion and activation of protein kinase C(PKC)

P48 is a cytokine which induces monocyte differentia-tion and the induction of cytotoxic activity. In this study,the signal transduction events involved in the stimulation of monocytes with the membrane form of P48 (mP48) were investigated. Monocyte stimulation with mP48 was found to involve the mobilization of intracellular calcium (Ca2+)and the activation and translocation of PKC from the cy-tosol to the membrane. Membane P48 induced a rapid rise of intracellular Ca2+ in a dose dependent maner. Simi-larly the stimulation of monocytes with P48 was found to involve the activation and translocation of PKC. The translocation of PKC was rapid (within 0-5 min) yet tran-sient with PKC activity returning to control levels by 8 min. The functional role of protein kineses in P48 induced TNF secretion was studied using various kinese inhibitors. The PKC inhibitors, H-7 and sphingosine, were found to inhibit P48 induced TNF secretion with 50% inhibition at 5μM HA1004, which inhibts cyclic nucleotide-dependent kinase (PKA, Ki 1.2μM), did not inhibit TNF secretion. H-8 (PKA inhibitor) was found to be an effective inhibitor of TNF secretion only at high concentrations(30μp. The Calmodulin-dependent kinase inhibitor, W7 (Ki 12μM)was found to be effective at concentration above 5μM.These findings suggest that P48-triggered TNF secretion involves transmembrane Ca2+ signaling and the subse-quent activation of at least two protein kineses, PKC and CaMK.

CA-MobileNet V2:轻量化的作物病害识别模型

在传统的作物病害识别的深度学习模型中,存在检测精度与效率不高的问题。针对上述问题提出一种轻量化的改进型MobileNet V2模型CA-MobileNet V2(coordinate attention),在提升检测精度的同时,部署在移动端便于种植者使用。在MobileNet V2中嵌入坐标注意力模块,提升模型的精度;加入TanhExp激活函数,加速模型收敛,增强模型的鲁棒性和泛化性;将模型部署到移动端APP中,使模型具有良好的可视化应用效果。在PantifyDr和Turkey-PlantDataset数据集上的对比实验结果表明,CA-MobileNet V2具有精度高和轻量化的优势。

Analysis of Mobile Phone Reliability Based on Active Disassembly Using Smart Materials

When using shape memory materials into active disassembly of actual electronic products, because the elastic modulus of shape memory materials is affected by the temperature is relatively large, therefore, the main difference of environmental reliability between active disassembly products and common products is the impact of collision and vibration under different temperature. Establishing three-dimensional analysis model, comparing the impact of collision and vibration of mobile phone shells which are made up of PVC materials after casting & radiation and PC/ABS materials under different temperature. Analyzing the reliability of mobile phone under different temperature and optimizing its structure according to data of testing.

The Relationship between Dimensions of Emerging Adulthood and Behavioral Problems among Chinese Emerging Adults: The Mediating Role of Physical Activity and Self- Control

Emerging adulthood(EA)is a critical stage of life to develop and sustain a healthy lifestyle,which is also a time of vulnerability to poor physical and mental health outcomes.In this study,we conducted a path analysis(N=1326)to examine associations among four dimensions of EA,levels of regular physical activity(PA),self-control,MPA tendency and irrational procrastination.Results found:1)higher levels of PA predicted both MPA tendency(β=−0.08,95%CI:−0.11 to−0.06,p<0.001)and irrational procrastination(β=−0.01,95%CI:−0.17 to−0.008,p<0.01)indirectly via self-control;2)Instability(β=0.13,95%CI:0.08 to 0.18,p<0.01)and Responsibility(β=−0.06,95%CI:−0.10 to−0.08,p=0.03)exerted direct effects on irrational procrastination and Instability also indirectly predicted irrational procrastination via MPA tendency(β=0.03,95%CI:0.02 to 0.05,p<0.01).These findings proved that perceived features of EA are linked to behavioral problems and supported that regular PA plays a crucial role to protect mental health.

Advances in mobility enhancement of ITZO thin-film transistors:a review

Indium-tin-zinc oxide(ITZO)thin-film transistor(TFT)technology holds promise for achieving high mobility and offers significant opportunities for commercialization.This paper provides a review of progress made in improving the mobility of ITZO TFTs.This paper begins by describing the development and current status of metal-oxide TFTs,and then goes on to explain the advantages of selecting ITZO as the TFT channel layer.The evaluation criteria for TFTs are subsequently introduced,and the reasons and significance of enhancing mobility are clarified.This paper then explores the development of high-mobility ITZO TFTs from five perspectives:active layer optimization,gate dielectric optimization,electrode optimization,interface optimization,and device structure optimization.Finally,a summary and outlook of the research field are presented.

Volatile Components and Antitumor Activity of Ganoderma lucidum Spore Oil and Its Molecular Distillation Components

[Objectives]To compare the effects of molecular distillation on the flavor and antitumor activity of Ganoderma lucidum spore oil.[Methods]G.lucidum spore oil was separated and purified by molecular distillation technology,and the volatile components of different components of molecular distillation were analyzed by gas chromatography-ion mobility spectrometry(GC-IMS)technology.Human liver carcinoma cells(HepG2),human breast cancer cells(MCF-7),and human cervical cancer cells(Hela)were selected as the tumor cell lines to be tested,and the cell viability was detected by the MTT assay.[Results]Molecular distillation effectively reduced small molecular substances produced by oil oxidation in G.lucidum spore oil,such as heptanal,octanal,linalool,hexanal,E-2-octanal,3-ethylpyridine,etc.Among the heavy components,the content of esters was relatively high,mainly including ethyl levulinate,ethyl crotonate,and amyl butyrate.The MTT cytotoxicity test indicated that G.lucidum spore oil and its molecular distillation components had certain inhibitory effects on the growth of three tumor cells,and G.lucidum spore oil crude oil had the most significant antitumor activity.G.lucidum spore oil crude oil,heavy component,and light component had the most significant antitumor activity on HepG2 cells,followed by MCF-7 cells,and the weakest antitumor activity on Hela cells.The quality of G.lucidum spore oil became higher after molecular distillation,and the rancid smell was reduced,and molecular distillation had little effect on the antitumor activity of G.lucidum spores.[Conclusions]Molecular distillation technology can be applied to the refining of G.lucidum spore oil to improve product quality.

干燥方式对苹果干品质特性及风味的影响

为探究提高静宁苹果干零食品质的加工方式,本研究探讨了5种干燥方式(热风干燥、太阳能干燥、真空冷冻干燥、微波-压差膨化干燥和热泵干燥)对苹果干能耗、抗氧化活性、微观结构和风味的影响。结果表明,和其它4种方式相比,在能耗方面,真空冷冻干燥的单位能耗最高(69.48±1.69 kW·h/kg),而太阳能干燥的单位能耗最低(19.60±1.36 kW·h/kg);在硬脆度方面,热风干燥的苹果干具有最高的硬度、最低的脆度,而真空冷冻干燥的苹果干硬度最低、脆度较高;在色差方面,真空冷冻干燥苹果干的L*值最高(72.91±0.59),ΔE值最接近鲜样(10.48±0.30);此外,真空冷冻干燥能有效降低苹果干中抗氧化物质的损失,与鲜样相比,其抗坏血酸、总酚和总黄酮的含量分别降低了35.22%、39.27%和32.02%。同时,总抗氧化能力、羟自由基清除率和超氧阴离子清除率也分别降低了23.50%、57.24%和10.56%;在微观结构方面,真空冷冻干燥的苹果干细胞层呈较规律的海绵状多孔性结构,质地较好;在风味方面,鉴定出5种干燥方式的苹果干有96种挥发性物质,其中真空冷冻干燥的苹果干更加芳香、口感更加丰富。综合考虑,真空冷冻干燥是提高苹果干零食品质特性和风味的推荐方法,对苹果干制品的工业化生产有现实的指导意义。

SlowFast架构下景区异常行为识别算法及预警研究

针对当前古建筑场景下人员异常行为识别相关实例缺乏、数据集少、古建筑级别低、质量次,导致人员异常行为识别准确率低等问题,该文在古建筑景区背景下自行拍摄了多组视频,从中挑选构建了人员异常行为动作的5033段视频数据集:具有明确的典型古建筑背景;具有多人场景下暴恐打架斗殴、刻划、刻画以及存在火灾风险的人员异常行为等特征,并对每个视频进行了注释。该文首次于SlowFast网络框架中成功引入信号时域特征活动性、移动性参数,对构建的数据集进行高阶时序特征建模、增加分类算子。在人员异常行为识别任务中,模型的Top1准确率达到93.54%,而平均准确率达到96.30%,在SlowFast模型中引入活动性、移动性算子后,模型识别的准确率提升了0.87%。与几种常见架构的算法相比,该文所提出的方法存在一定的优势。

离子淌度质谱在食品分析中的应用

离子淌度谱是一种以样品离子在电场和气流共同作用下发生迁移时的差异来表征化合物的技术,可根据离子的电荷数、质量、尺寸以及形状对其进行分离,同时还可以通过计算出离子的碰撞横截面积,从而获得化合物的结构信息,在分离物质的同分异构体方面表现出优异的性能。近年来,多种离子淌度技术相继出现,并与质谱技术相联合广泛应用于食品、生物、医药、环境等领域。本文介绍了离子淌度谱技术的种类和工作原理,分析了不同种类技术当前存在的优势和缺陷,综述了离子淌度谱和液相、质谱等多维联用在分析鉴定食品营养活性成分和食品化学危害物中的应用,并对该技术的应用前景和发展趋势进行了展望。

时空约束对运动出行的影响

运动出行(Active Travel或Active Mobility,AT或AM)是一种以出行者自我为驱动的出行方式,由于其占用道路面积小、机动性强、可持续性好,因此对缓解城市交通压力、改善城市交通的时空不合理性起着至关重要的作用。文中首先研究了运动出行的定义和内涵;其次从影响运动出行的时空条件出发,以点和线的视角将时间与空间拆分成出发时间、出行时间、出行距离与建成环境4类约束条件,依次阐述不同类型的时空条件特征,并对运动出行与时空约束间的潜在联系进行分析;接着以单一约束和多种时空组合作为切入点,分析其对运动出行的影响;通过归纳发现,时空约束对运动出行的影响比传统认知中更为复杂,主要呈非线性关系且存在相应的理论阈值;最后提出当前理论研究中的不足之处及未来的研究方向。文章旨在归纳时空对运动出行的制约作用,展示不同时空约束作用下运动出行的具体变化规律,以期改变城市出行者的固有思维,提高运动出行的分担率,促进城市交通出行结构的进一步优化。

植入式静脉输液港肩关节受限患者的康复训练

目的 探讨康复训练方案在植入式静脉输液港肩关节受限患者中的应用效果。方法 选取植入式静脉输液港肩部活动受限患者,按入院时间先后将69例设为对照组,采用常规握力球进行训练;72例设为干预组,采用康复训练方案进行干预。3个月后,比较两组患者肩关节活动度、日常生活活动能力及并发症发生情况。结果 两组干预后肩关节活动度前屈、外展、外旋、内旋、后伸活动度及日常生活活动能力评分显著优于本组干预前,干预后干预组关节活动度及日常生活活动能力评分显著优于对照组,血栓发生率显著低于对照组(均P<0.05);两组导管堵塞、异位发生率比较,差异无统计学意义(均P>0.05)。结论 康复训练方案简单易学,容易掌握,不受场地与时间限制,能改善静脉输液港肩关节受限患者肩关节活动度、日常生活活动能力,降低患者血栓发生率。

“对象性活动”:马克思辩证法的本体论基础——对《1844年经济学哲学手稿》中辩证法思想的理解

《1844年经济学哲学手稿》是马克思辩证法理论的真正开端。在手稿中,马克思对非批判的运动以及非批判的形式进行了双重的批判,从而确定了辩证法的本体论基础——“对象性活动”。“对象性活动”内蕴了辩证法理论的三个基本原则,即建立在感性基础上的现实性原则、以主体性为基础的活动性原则、以对象性为基础的历史性原则。辩证法的三原则是建构“合理形态”的辩证法的前提,是批判性、革命性的本质展现,是现实性和力量性的地基。

具有自驱动有源缓冲器的GaN基高效准谐振反激式功率变换器

提出了一种具有自驱动有源缓冲器的GaN基高效准谐振(QR)反激式功率变换器,以解决准谐振反激式功率变换器中开关管关断时电压过高的问题。电路以GaN高电子迁移率晶体管(HEMT)器件为主开关管和同步整流器开关管,自驱动有源缓冲器由钳位电容和有源开关管组成。该变换器在主开关管关断期间将开关管的电压浪涌钳位为恒定电压,由于有源开关管驱动信号由变压器的次级侧电流控制,因此不需要单独的控制电路。为验证所提出的变换器和控制电路的有效性,搭建了一个60 W的AC-DC功率变换器,测试结果表明,主开关管的最大电压浪涌约为450 V,具有高达91.6%的能量转换效率。

服务贸易是“稳就业”的新引擎吗?——来自服务贸易创新发展试点的证据

将服务贸易创新发展试点作为服务贸易发展的准自然实验,利用2007—2021年中国285个地级及以上城市面板数据,考察服务贸易发展对劳动力就业规模与就业结构的因果效应。研究发现:服务贸易创新发展试点建设能显著扩大就业规模,并优化产业层面与技能层面的就业结构。在克服内生性问题、排除异质性处理效应、控制城市特征与自由贸易试验区政策等一系列稳健性检验后,该结论依然成立。机制检验表明,服务贸易发展能通过出口增长、创业活跃度提升与劳动力流动渠道对就业规模产生影响,并通过产业结构高级化与技术创新等途径对就业结构产生影响。异质性分析发现,服务贸易创新试点政策的就业效应在行政等级更高、地理区位更具优势、经济发展与数字经济发展水平更高的城市更为明显。空间效应分析表明,服务贸易创新发展试点政策的就业效应具有空间溢出效应。研究结论为利用服务贸易高质量发展促进“稳就业”提供了重要的政策启示。

关节松动术配合针刺治疗颞下颌关节紊乱综合征

目的探讨关节松动术配合针刺治疗颞下颌关节紊乱综合征(TMJDS)临床疗效。方法选择颞下颌关节紊乱综合征患者144例,按照随机数表法分成观察组与对照组。对照组给予单纯针刺治疗,观察组在针刺治疗基础上配合关节松动术治疗4周。比较2组口腔健康影响程度量表(OHIP-14)评分、国际常用视觉模拟评分量表(VAS)评分、最大张口度、中文版颞下颌功能受损评分(MFIQ)及Fricton颞下颌关节紊乱指数,比较2组临床疗效和安全性。结果2组治疗后OHIP-14评分,VAS评分,MFIQ评分,功能障碍指数(DI)、肌肉触压痛指数(PI)、颞下颌关节指数(CMI)评分均降低(P<0.05),且观察组低于对照组(P<0.05);2组治疗后最大张口度均升高(P<0.05),且观察组高于对照组(P<0.05);观察组总有效率高于对照组(P<0.05);2组均未发生与治疗相关的不良事件。结论关节松动术配合针刺能够改善颞下颌关节紊乱综合征患者疼痛和颞下颌功能活动,提高最大张口度,疗效明显。