期刊文献+
共找到3,598篇文章
< 1 2 180 >
每页显示 20 50 100
Identification and Gene Mapping of Completely Dominant Earliness in Rice 被引量:2
1
作者 DENG Xiao-jian, ZHOU Kai-da, LI Ren-duan, CHUN Ze LI Ping, WANG Wen-ming, ZHAI Wen-xue and ZHU Li-huang( Rice Research Institute, Sichuan Agricultural University, Wenjiang 611130 Institute of Genetics, Chinese Academy of Sciences, Beijing 100101) 《Agricultural Sciences in China》 CAS CSCD 2002年第1期11-18,共8页
The completely dominant earliness was identified in a genie male-sterile and early maturing indica line 6442S-7. F1 progenies from 6442S-7 crossed with thirteen various types of medium- or late-maturing varieties, sha... The completely dominant earliness was identified in a genie male-sterile and early maturing indica line 6442S-7. F1 progenies from 6442S-7 crossed with thirteen various types of medium- or late-maturing varieties, shared the same heading date as 6442S-7. The segregation of heading date in the F2 and B1F1 populations showed that the earliness of 6442S-7 is mainly controlled by two dominant major genes. The local linkage map of one dominant earliness gene harbored in 6442S-7 was constructed with F2 population and four kinds of molecular marker techniques. The results showed that the gene was located between a RFLP marker C515 and a RAPD marker OPI 11.557 on the terminal region of short arm of rice chromosome 3, 10.9cM and 1.5cM from C515 and OPI11.557, respectively. The genetic distances from the target gene to two SSR markers, RM22 and RM231, and one AFLP marker, PT671, were 3.0, 6.7 and 12.4 cM, respectively. This gene, being identified and mapped first, is designated tentatively as Ef-cd(t). As a new genetic resource of completely dominant earliness, 6442S-7 has splendid future in rice improvement. 展开更多
关键词 Oryza saliva L. Growth duration earliness Dominant earliness gene Gene mapping
在线阅读 下载PDF
Isolation, Identification and Earliness Effect Analysis of Rice Dominant Earliness Gene Ef-cd
2
作者 DENG Xiao-jian WANG Ping-rong +2 位作者 LI Xiu-lan DONG Chun-lin YANG Zhi-rong 《Agricultural Sciences in China》 CAS CSCD 2005年第8期561-566,共6页
Ef-cd gene is a dominant earliness gene located on the short arm of rice chromosome 3. In this paper, through continuous backcross, self-pollination and molecular marker assisted selection, individual Ef-cd gene was i... Ef-cd gene is a dominant earliness gene located on the short arm of rice chromosome 3. In this paper, through continuous backcross, self-pollination and molecular marker assisted selection, individual Ef-cd gene was isolated and its nearly isogenic lines were constructed by using early-maturing indica line 6442S-7 as the donor parent, and by using latematuring indica line Minghui 63 (MH63), Shuhui 881 (SH881) and Shuhui 527 (SH527) as the recurrent parents (genetic background), respectively. Further, it was found out that Ef-cd gene could generally advance rice to head 11-14 d earlier. So, it was considered that Ef-cd gene played an important role in rapid developing early-maturing and super high-yielding rice varieties. 展开更多
关键词 RICE Growth duration earliness Dominant earliness gene Gene effect
在线阅读 下载PDF
Genetic Analysis of Earliness Traits in Short Season Cotton (Gossypium hirsutum L.) 被引量:4
3
作者 SONG Mei-zhen FAN Shu-li +2 位作者 YUAN Ri-hong PANG Chao-you YU Shu-xun 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2012年第12期1968-1975,共8页
Inheritance and interrelationship of phenotype and genotype of earliness traits were evaluated in a diallel analysis involving six early-maturing parents. Date of first square (DFS), date of first flower (DFF), da... Inheritance and interrelationship of phenotype and genotype of earliness traits were evaluated in a diallel analysis involving six early-maturing parents. Date of first square (DFS), date of first flower (DFF), date of first open boll (DFOB), number of node first sympodial branch (NNFSB), and harvested rate before frost (HRBF) as earliness traits of six parents, 15 F1 hybrids and 15 F2 progenies were investigated from 2005 to 2008. The experiment design was a randomized complete block design with three replications. Additive, dominance and epistasis effects were analyzed with ADAA (additive- dominance-epistasis) model. HRBF, DFF, and DFOB showed significant additive genetic variances. Heritability estimates ranged from 0.088 (HN, narrow sense) and 0.416 (HNE, environment interaction) for HRBF, to 0.103 (HN) and 0.524 (HNE) for DFF, and to 0.187 (HN) and 0.519 (H~) for DFOB. Dominance genetic effects for DFS, DFF, DFOB, and NNSFB were stronger than additive effects. Additive-by-additive epistatic effects for DFS, DFOB, and NNSFB were detected and affected by environment. Correlation analysis showed generally that HRBF had a significant negative genetic and phenotypic correlation with DFS, DFOB, and NNFSB; DFS had significant positive genetic and phenotypic correlations with DFF, DFOB, and NNFSB; significant positive genetic and phenotypic correlations were also detected between DFF and DFOB, DFF and NNFSB, DFOB and NNFSB. The results showed that the lower the node to the first fruiting branch and the shorter the plant, the earlier was the onset of squaring, flowering, and boll opening, the higher was the harvest rate before frost. Heredity of earliness traits among parents and their hybrids were also detected and parents A1, A2, Bl, B2, and B3 could be used to improve earliness traits of short season cotton cultivars. 展开更多
关键词 COTTON earliness traits INHERITANCE additive effect dominant effect additive-by-additive effect
在线阅读 下载PDF
Scheduling problems on tardiness penalty and earliness award with simply linear processing time 被引量:2
4
作者 余英 卢圳 +2 位作者 孙世杰 何龙敏 胡晶地 《Journal of Shanghai University(English Edition)》 CAS 2009年第2期123-128,共6页
In this paper, a single-machine scheduling model with a given common due date and simple linear processing times was considered. The objective is the total weighted tardiness penalty and earliness award. Some polynomi... In this paper, a single-machine scheduling model with a given common due date and simple linear processing times was considered. The objective is the total weighted tardiness penalty and earliness award. Some polynomial time solvable cases for this problem are given. A dynamic programming algorithm was provided and a branch and bound algorithm for general case of the problem was provided based on a rapid method for estimating the lower bound. 展开更多
关键词 SCHEDULING single machine TARDINESS earliness
在线阅读 下载PDF
Scatter Search Based Particle Swarm Optimization Algorithm for Earliness/Tardiness Flowshop Scheduling with Uncertainty 被引量:2
5
作者 Jia-Can Geng Zhe Cui Xing-Sheng Gu 《International Journal of Automation and computing》 EI CSCD 2016年第3期285-295,共11页
Considering the imprecise nature of the data in real-world problems, the earliness/tardiness (E/T) fiowshop scheduling problem with uncertain processing time and distinct due windows is concerned in this paper. A fu... Considering the imprecise nature of the data in real-world problems, the earliness/tardiness (E/T) fiowshop scheduling problem with uncertain processing time and distinct due windows is concerned in this paper. A fuzzy scheduling model is established and then transformed into a deterministic one by employing the method of maximizing the membership function of middle value. Moreover, an effective scatter search based particle swarm optimization (SSPSO) algorithm is proposed to minimize the sum of total earliness and tardiness penalties. The proposed SSPSO algorithm incorporates the scatter search (SS) algorithm into the frame of particle swarm optimization (PSO) algorithm and gives full play to their characteristics of fast convergence and high diversity. Besides, a differential evolution (DE) scheme is used to generate solutions in the SS. In addition, the dynamic update strategy and critical conditions are adopted to improve the performance of SSPSO. The simulation results indicate the superiority of SSPSO in terms of effectiveness and efficiency. 展开更多
关键词 earliness/tardiness (E/T) SCHEDULING fuzzy modeling scatter search (SS) particle swarm optimization (PSO).
原文传递
A dynamic programming algorithm for scheduling problems on earliness award and tardiness penalty with time-dependent processing time 被引量:1
6
作者 余英 孙世杰 何龙敏 《Journal of Shanghai University(English Edition)》 CAS 2008年第3期204-209,共6页
In this paper, a single-machine scheduling model with a given common due date is considered. Job processing time is a linear decreasing function of its starting time. The objective function is to minimize the total we... In this paper, a single-machine scheduling model with a given common due date is considered. Job processing time is a linear decreasing function of its starting time. The objective function is to minimize the total weighted earliness award and tardiness penalty. Our aim is to find an optimal schedule so as to minimize the objective function. As the problem is NP-hard, some properties and polynomial time solvable cases of this problem are given. A dynamic programming algorithm for the general case of the problem is provided. 展开更多
关键词 scheduling SINGLE-MACHINE linear decreasing processing time earliness TARDINESS
在线阅读 下载PDF
Genetic Mechanism of Dominant Earliness in Kefeng A,a New Rice Cytoplasmic Male Sterile Line
7
作者 XIAO Yu-long Yu Chuan-yuan +3 位作者 LEI Jian-guo LI Ma-zhong JIANG Lin WAN Jian-min 《Rice science》 SCIE 2009年第4期267-273,共7页
Kefeng A is an early maturing indica cytoplasmic male sterile (CMS) line of rice. Combinations derived from Kefeng A and late maturing indica restorer lines showed dominant earliness to various extents. To understan... Kefeng A is an early maturing indica cytoplasmic male sterile (CMS) line of rice. Combinations derived from Kefeng A and late maturing indica restorer lines showed dominant earliness to various extents. To understand the genetic basis of dominant earliness, the genotype of photoperiod-sensitive genes in Kefeng A was analyzed using a complete set of heading time near isogenic lines (NILs) EGO to EG7, ER, LR, T65, T65E^b, T65E^bm, T65m, NIL(Hd1) and NIL(Hd4). Results indicated that Kefeng A contained two dominant photoperiod-sensitive alleles E1 and Se-1^U on E1 and Se-1 loci, respectively, and the genotype of photoperiod-sensitivity genes for heading time in Kefeng A was E1E1e2e2E3E3Se-1^USe-1UEf-1Ef-1. Based on the detected heading time genotype, in combination with the heading time of Kefeng A and the early maturing phenomenon in its derived F1 hybrids, it is speculated that Kefeng A might carry a dominant inhibitor gene Su-E7 for the dominant photoperiod- sensitive gene E1, and a recessive inhibitor gene i-Se-1 for another dominant photoperiod-sensitive gene Se-1. The reason why F1 hybrids from Kefeng A exhibited early maturing was hereby analyzed and the breeding value of dominant earliness related genes in Kefeng A was discussed. 展开更多
关键词 dominant earliness heading time GENOTYPE genetic mechanism cytoplasmic male sterile line RICE
在线阅读 下载PDF
Simulated Annealing for Earliness/Tardiness Production Planning Model 被引量:1
8
作者 LI Ying\|juan\+1,\ WANG Ding\|wei\+2 1. Department of Industry and Business Administration, Shenyang University Shenyang 110013,China 2. Department of Systems Engineering, College of Information Science and Engineering,Northeastern University,Shenyan 《Systems Science and Systems Engineering》 CSCD 2000年第1期93-98,共6页
To describe the earliness/tardiness production planning problems in the JIT environment, a nonlinear semi\|infinite programming model was proposed in \. Due to a nonconvex objective function and many infinite constrai... To describe the earliness/tardiness production planning problems in the JIT environment, a nonlinear semi\|infinite programming model was proposed in \. Due to a nonconvex objective function and many infinite constraints, the model is difficult to be solved by traditional methods. In this paper, simulated annealing method combined with a heuristic is developed. Numerical results shows that the present approach is very efficient. Theoretically, the developed method is an attempt to solve a continuous domain problem by using simulated annealing. 展开更多
关键词 earliness/tardiness schedule semi\|infinite programming HEURISTIC simulated annealing
原文传递
Bromodomain-containing protein 4 knockdown promotes neuronal ferroptosis in a mouse model of subarachnoid hemorrhage 被引量:2
9
作者 Peng Lu Fan Zhang +8 位作者 Lei Yang Yijing He Xi Kong Kecheng Guo Yuke Xie Huangfan Xie Bingqing Xie Yong Jiang Jianhua Peng 《Neural Regeneration Research》 2026年第2期715-729,共15页
Neuronal cell death is a common outcome of multiple pathophysiological processes and a key factor in neurological dysfunction after subarachnoid hemorrhage.Neuronal ferroptosis in particular plays an important role in... Neuronal cell death is a common outcome of multiple pathophysiological processes and a key factor in neurological dysfunction after subarachnoid hemorrhage.Neuronal ferroptosis in particular plays an important role in early brain injury.Bromodomain-containing protein 4,a member of the bromo and extraterminal domain family of proteins,participated in multiple cell death pathways,but the mechanisms by which it regulates ferroptosis remain unclear.The primary aim of this study was to investigate how bromodomain-containing protein 4 affects neuronal ferroptosis following subarachnoid hemorrhage in vivo and in vitro.Our findings revealed that endogenous bromodomain-containing protein 4 co-localized with neurons,and its expression was decreased 48 hours after subarachnoid hemorrhage of the cerebral cortex in vivo.In addition,ferroptosis-related pathways were activated in vivo and in vitro after subarachnoid hemorrhage.Targeted inhibition of bromodomain-containing protein 4 in neurons increased lipid peroxidation and intracellular ferrous iron accumulation via ferritinophagy and ultimately led to neuronal ferroptosis.Using cleavage under targets and tagmentation analysis,we found that bromodomain-containing protein 4 enrichment in the Raf-1 promoter region decreased following oxyhemoglobin stimulation in vitro.Furthermore,treating bromodomain-containing protein 4-knockdown HT-22 cell lines with GW5074,a Raf-1 inhibitor,exacerbated neuronal ferroptosis by suppressing the Raf-1/ERK1/2 signaling pathway.Moreover,targeted inhibition of neuronal bromodomain-containing protein 4 exacerbated early and long-term neurological function deficits after subarachnoid hemorrhage.Our findings suggest that bromodomain-containing protein 4 may have neuroprotective effects after subarachnoid hemorrhage,and that inhibiting ferroptosis could help treat subarachnoid hemorrhage. 展开更多
关键词 bromodomain-containing protein 4 cell death early brain injury ferritinophagy ferroptosis neurological deficits neuron oxidative stress RAF proto-oncogene serine/threonine-protein kinase(Raf-1) subarachnoid hemorrhage
暂未订购
Early intelligent active assistance in walking for hemiplegic patients under suspension protection: a randomized controlled trial
10
作者 Ma Shanxin Zheng Jianling +5 位作者 Cheng Jian Lin Xi Li Qiuyuan Wang Li Zeng Yangkang Song Luping 《中国组织工程研究》 北大核心 2026年第12期3075-3082,共8页
BACKGROUND:Hemiplegia,a prevalent stroke-related condition,is often studied for motor dysfunction;however,spasticity remains under-researched.Abnormal muscle tone significantly hinders hemiplegic patients’walking rec... BACKGROUND:Hemiplegia,a prevalent stroke-related condition,is often studied for motor dysfunction;however,spasticity remains under-researched.Abnormal muscle tone significantly hinders hemiplegic patients’walking recovery.OBJECTIVE:To determine whether early suspension-protected training with a personal assistant machine for stroke patients enhances walking ability and prevents muscle spasms.METHODS:Thirty-two early-stage stroke patients from Shenzhen University General Hospital and the China Rehabilitation Research Center were randomly assigned to the experimental group(n=16)and the control group(n=16).Both groups underwent 4 weeks of gait training under the suspension protection system for 30 minutes daily,5 days a week.The experimental group used the personal assistant machine during training.Three-dimensional gait analysis(using the Cortex motion capture system),Brunnstrom staging,Fugl-Meyer Assessment for lower limb motor function,Fugl-Meyer balance function,and the modified Ashworth Scale were evaluated within 1 week before the intervention and after 4 weeks of intervention.RESULTS AND CONCLUSION:After the 4-week intervention,all outcome measures showed significant changes in each group.The experimental group had a small but significant increase in the modified Ashworth Scale score(P<0.05,d=|0.15|),while the control group had a large significant increase(P<0.05,d=|1.48|).The experimental group demonstrated greater improvements in walking speed(16.5 to 38.44 cm/s,P<0.05,d=|4.01|),step frequency(46.44 to 64.94 steps/min,P<0.05,d=|2.32|),stride length(15.50 to 29.81 cm,P<0.05,d=|3.44|),and peak hip and knee flexion(d=|1.82|to|2.17|).After treatment,the experimental group showed significantly greater improvements than the control group in walking speed(38.44 vs.26.63 cm/s,P<0.05,d=|2.75|),stride length,peak hip and knee flexion(d=|1.31|to|1.45|),step frequency(64.94 vs.59.38 steps/min,P<0.05,d=|0.85|),and a reduced support phase(bilateral:24.31%vs.28.38%,P<0.05,d=|0.88|;non-paretic:66.19%vs.70.13%,P<0.05,d=|0.94|).For early hemiplegia,personal assistant machine-assisted gait training under the suspension protection system helps establish a correct gait pattern,prevents muscle spasms,and improves motor function. 展开更多
关键词 hemiplegia stroke suspension protection system personal assistant machine intelligent walking aid early rehabilitation active training walking function NEUROPLASTICITY gait analysis motor function recovery rehabilitation training balance ability
暂未订购
Deciphering the genetic regulation of flowering time in rapeseed for early-maturation breeding
11
作者 Minghao Zhang Wei Chang +16 位作者 Ruicheng Hu Yuxuan Ruan Xiaodong Li Yonghai Fan Boyu Meng Shengting Li Mingchao Qian Yuling Chen Yuanyi Mao Daifei Song Haikun Yang Luxiang Niu Guangyuan Cao Zhixia Deng Zhixuan Qin Hui Wang Kun Lu 《Journal of Genetics and Genomics》 2026年第1期16-27,共12页
Flowering time is a critical agronomic trait with a profound effect on the productivity and adaptabillity of rapeseed(Brassica napus L.).Strategically advancing flowering time can reduce the risk of yield losses due t... Flowering time is a critical agronomic trait with a profound effect on the productivity and adaptabillity of rapeseed(Brassica napus L.).Strategically advancing flowering time can reduce the risk of yield losses due to extreme climatic conditions and facilitate the cultivation of subsequent crops on the same land,thereby enhancing overall agricultural efficiency.In this review,we synthesize current information on flowering time regulation in rapeseed through an integrated analysis of its genetic,hormonal,and environmental dimensions,emphasizing their crosstalk and implications for yield.We consolidate multi-omics evidence from population genetics,functional genomics,and systems biology to create a haplotype-based framework that overcomes the trade-off between flowering time and yield,providing support for the precision breeding of early-maturing cultivars.The insights presented here could inform future research on flowering time regulation and guide strategies for increasing rapeseed productivity. 展开更多
关键词 Brassica napus Early maturation Flowering time Genetic regulation YIELD
原文传递
Effect of Lithium Hydroxide and Borax on Properties of Low Alkali Sulphoaluminate Special Concrete
12
作者 CHEN Tingchao LIU Rongjin +3 位作者 JING Daiyan ZHAO Yingren ZHEN Yixing WEI Jiazhan 《Journal of Wuhan University of Technology(Materials Science)》 2026年第1期247-257,共11页
The engineering application of low-alkali sulphoaluminate cement(L-SAC)is hindered due to the difficulty in adjusting the setting and hardening time.In this paper,lithium hydroxide and borax are mixed into L-SAC to re... The engineering application of low-alkali sulphoaluminate cement(L-SAC)is hindered due to the difficulty in adjusting the setting and hardening time.In this paper,lithium hydroxide and borax are mixed into L-SAC to regulate its setting and hardening process,so as to prepare a sulphoaluminate concrete material with high early strength and high fluidity.The effects of the ratio of lithium hydroxide to borax on the properties of L-SAC concrete were studied by hydration heat,XRD,TG-DTG,SEM and MIP.The experimental results show that the slump increases with the increase of borax content,and the early(3 h)strength increases with the increase of lithium hydroxide content.When 0.05% lithium hydroxide and 0.4% borax are added,the 0.5 h slump reaches 195 mm,and the 3 h compressive strength reaches 15.9 MPa.The increase of lithium hydroxide will promote the formation of early hydration products AFt and AH3 gel and accelerate the hydration process,while borax will inhibit the dissolution and hydration of cement and delay the setting and hardening process of concrete.The combination of the two ensures that the concrete has the characteristics of high early strength and high fluidity,and the early workability and mechanical properties can be controlled by the mix ratio.For long-term mechanical properties,the special concrete does not produce AFm,which can ensure the continuous development of strength. 展开更多
关键词 low-alkali sulphoaluminate cement CONCRETE high early strength high flow ETTRINGITE
原文传递
Research advances in the application of early enteral nutrition in elderly patients with severe acute pancreatitis
13
作者 Yue-Fang Gao Fang He 《Frontiers of Nursing》 2026年第1期1-6,共6页
This article reviews research advances in the application of early enteral nutrition(EEN)in elderly patients with severe acute pancreatitis(SAP).Elderly SAP patients are associated with higher mor tality rates due to ... This article reviews research advances in the application of early enteral nutrition(EEN)in elderly patients with severe acute pancreatitis(SAP).Elderly SAP patients are associated with higher mor tality rates due to age-related immune dysfunction,whereas EEN has been demonstrated to improve clinical prognosis,reduce infection and complication rates,and shor ten hospital stays.However,ongoing debates exist regarding the optimal timing,route selection,and complication management of EEN.Through a systematic review of the literature,this study synthesizes current evidence on EEN in elderly SAP populations,critically examines unresolved clinical controversies,and proposes future research priorities to inform evidence-based practice. 展开更多
关键词 early enteral nutrition ELDERLY intervention timing nutrition route review severe acute pancreatitis
暂未订购
Discrepancies between preoperative assessment and final pathological criteria in early gastric cancer
14
作者 Mo-Yi-Ge Jize Wei Wu +1 位作者 Shi-Gang Ding Jing Zhang 《World Journal of Gastrointestinal Oncology》 2026年第1期163-175,共13页
BACKGROUND Inappropriate selection of patients with early gastric cancer(EGC)for endoscopic submucosal dissection(ESD)may lead to non-curative resection,necessitating additional gastrectomy.Conversely,inappropriate se... BACKGROUND Inappropriate selection of patients with early gastric cancer(EGC)for endoscopic submucosal dissection(ESD)may lead to non-curative resection,necessitating additional gastrectomy.Conversely,inappropriate selection for gastrectomy may result in overtreatment,adversely affecting patients’quality of life.Few have systematically evaluated the concordance between therapeutic indications under current Japanese guidelines and pathological criteria in EGC.To minimize noncurative resection risks while sparing unnecessary surgery for low-risk patients’,we specifically assess the suitability of Japanese guidelines in non-Japanese populations.This work aims to optimize clinical practice by refining endoscopic treatment criteria for adoption beyond Japan.AIM To evaluate EGC clinical decision accuracy by comparing therapeutic indication with postoperative pathological criteria and analyzing factors influencing discrepancies.METHODS A retrospective analysis was conducted on 796 EGC cases diagnosed at Peking University Third Hospital between January 2010 and December 2022.Cases were categorized into three groups:Same-estimated(preoperative therapeutic indication with postoperative pathological criteria matched),underestimated(preoperative ESD indication but postoperative surgical criteria),and overestimated(preoperative surgical indication but postoperative ESD criteria).The rate of discrepancy and associated risk factors were assessed.RESULTS The accuracy rates of preoperative evaluation for ESD and gastrectomy indications were 73.0%(321/430)and 76.0%(278/366),respectively.The overall discrepancy rate was 25.6%(204/796).Multivariate analysis identified tumor location in the upper-third stomach(odds ratio=2.158,95%confidence interval:1.373-3.390,P=0.001)was significantly associated with a higher likelihood of being underestimated and undifferentiated histologic type on preoperative biopsy(odds ratio=2.005,95%confidence interval:1.036-3.879,P=0.039)was more likely to be overestimated.Significant differences were observed in tumor diameter(P<0.001),depth of infiltration(P<0.001),ulcerative findings(P<0.001),and histologic type(P<0.001)between preoperative and postoperative evaluations.CONCLUSION The accuracy of preoperative EGC indications is 74.4%.Upper-third stomach and undifferentiated histology are primary discrepancy predictors.Upper-third tumors are prone to underestimation,while undifferentiated tumors are prone to overestimation. 展开更多
关键词 Early gastric cancer Endoscopic submucosal dissection GASTRECTOMY Therapeutic indication Pathological criteria
暂未订购
Deformation warning of surrounding rock mass of underground powerhouse based on octree theory and microseismic monitoring
15
作者 Linlu Dong Nuwen Xu +5 位作者 Peng Li Huabo Xiao Yonghong Li Yuepeng Sun Biao Li Tieshuan Zhao 《Journal of Rock Mechanics and Geotechnical Engineering》 2026年第2期1160-1176,共17页
The effective early warning of surrounding rock mass deformation is crucial in geotechnical engineering for ensuring the safety and stability of underground constructions.This study introduces a novel risk early warni... The effective early warning of surrounding rock mass deformation is crucial in geotechnical engineering for ensuring the safety and stability of underground constructions.This study introduces a novel risk early warning model based on multi-parameter fuzzy comprehensive evaluation,which quantitatively assesses the risk state of the surrounding rock mass.The microseismic(MS)monitoring system is set up for the underground powerhouse.The spatial and temporal distribution of MS events and the frequency characteristics of MS signals are analyzed during the top arch excavation.The early warning indices for characterizing MS spatial aggregation and frequency-energy dispersion are proposed based on the octree theory to assess the deformation of the surrounding rock mass.The risk warning model for the surrounding rock mass in underground engineering is developed through the integration of the formulated index and the frequency characteristics of MS signals.The results indicate that the multiparameter fuzzy comprehensive assessment model can achieve three-dimensional visualization of risk warnings for the surrounding rock mass.The quantitative results regarding warning time and potential deformation areas are highly consistent with the characteristics of MS precursors.These research results can provide an important reference for early warning of surrounding rock mass risk in similar underground projects. 展开更多
关键词 Underground powerhouse Octree theory Microseismic monitoring Early warning model
在线阅读 下载PDF
Deciphering the dialogue between the bovine blastocyst and the uterus:embryo-induced alterations in extracellular vesicle protein content from an ex vivo model and the in vivo environment
16
作者 Rosane Mazzarella Jose Maria Sanchez +10 位作者 Sandra Guisado Egido Michael McDonald Alberto Alvarez‑Barrientos Esperanza Gonzalez Juan Manuel Falcon-Perez Mikel Azkargorta Felix Elortza Maria Encina Gonzalez Pat Lonergan Dimitrios Rizos Beatriz Fernandez-Fuertes 《Journal of Animal Science and Biotechnology》 2026年第1期213-240,共28页
Backgroud Efficient communication between the embryo and the endometrium is essential for the successful establishment and maintenance of pregnancy.Uterine-derived extracellular vesicles(EVs)contribute to embryomatern... Backgroud Efficient communication between the embryo and the endometrium is essential for the successful establishment and maintenance of pregnancy.Uterine-derived extracellular vesicles(EVs)contribute to embryomaternal communication,supporting early embryonic development.This study aimed to:(i)compare the protein cargo of uterine fluid EVs(UF-EVs)from CYCLIC and PREGNANT heifers;(ii)characterize the protein profile of conditioned medium(CM)-EVs from endometrial explants cultured alone(EXPL)or co-cultured with five d 7 blastocysts(EXPL+EMB)in vitro;and(iii)compare the EV protein cargo between the in vivo and in vitro models(i.e.,EXPL vs.CYCLIC and EXPL+EMB vs.PREGNANT).Results We identified 1,459 and 1,752 proteins in the UF-EVs of CYCLIC and PREGNANT heifers,respectively.Among these,12 were exclusive to CYCLIC,and 18 were exclusive to PREGNANT.Among the 1,329 proteins identified in both groups,16 were differently abundant;ten were more abundant,and six were less abundant in UF-EVs from PREGNANT heifers.In vivo,the changes in UF-EV protein cargo induced by the presence of a blastocyst were related to inflammatory and immune responses,endometrial receptivity,and support of early embryonic development by promoting cell polarity,cell–cell adhesion,and stem cell differentiation.In vitro,we identified 1,501 proteins in the CM-EVs from EXPL,1,975 in the CM-EVs from EXPL+EMB,and 82 in the CM-EVs from EMB.Additionally,50 proteins were unique to EXPL+EMB,and another 33 were differentially abundant due to the synergistic interaction between the embryo and the endometrium.These proteins are involved in embryonic development,regulation of stem cell differentiation,establishment and maintenance of cell polarity,interferon tau(IFNT)-mediated cell signaling,endometrial receptivity,and immune modulation.Although there are qualitative and quantitative differences between in vivo and in vitro-derived EVs,UF-EVs from CYCLIC heifers compared to CM-EVs from EXPL,as well as UFEVs from PREGNANT heifers compared to CM-EVs from EXPL+EMB shared common proteins.Conclusions These findings highlight the pivotal role of EVs in embryo-maternal communication,suggesting that their protein cargo may actively contribute to the modulation of the uterine environment to support early embryonic development.Understanding these molecular interactions could provide valuable insights into the mechanisms of implantation and pregnancy establishment. 展开更多
关键词 Bovine blastocysts Early pregnancy Embryonic extracellular vesicles Embryo-maternal communication Endometrial explants Proteomics Uterine fluid
在线阅读 下载PDF
Unlocking the silent signals:Motor kinematics as a new frontier in early detection of mild cognitive impairment
17
作者 Takahiko Nagamine 《World Journal of Psychiatry》 2026年第1期1-6,共6页
The increasing global prevalence of mild cognitive impairment(MCI)necessitates a paradigm shift in early detection strategies.Conventional neuropsychological assessment methods,predominantly paper-and-pencil tests suc... The increasing global prevalence of mild cognitive impairment(MCI)necessitates a paradigm shift in early detection strategies.Conventional neuropsychological assessment methods,predominantly paper-and-pencil tests such as the Mini-Mental State Examination and the Montreal Cognitive Assessment,exhibit inherent limitations with respect to accessibility,administration burden,and sensitivity to subtle cognitive decline,particularly among diverse populations.This commentary critically examines a recent study that champions a novel approach:The integration of gait and handwriting kinematic parameters analyzed via machine learning for MCI screening.The present study positions itself within the broader landscape of MCI detection,with a view to comparing its advantages against established neuropsychological batteries,advanced neuroimaging(e.g.,positron emission tomography,magnetic resonance imaging),and emerging fluid biomarkers(e.g.,cerebrospinal fluid,blood-based assays).While the study demonstrates promising accuracy(74.44%area under the curve 0.74 with gait and graphic handwriting)and addresses key unmet needs in accessibility and objectivity,we highlight its cross-sectional nature,limited sample diversity,and lack of dual-task assessment as areas for future refinement.This commentary posits that kinematic biomarkers offer a distinctive,scalable,and ecologically valid approach to widespread MCI screening,thereby complementing existing methods by providing real-world functional insights.Future research should prioritize longitudinal validation,expansion to diverse cohorts,integration with multimodal data including dual-tasking,and the development of highly portable,artificial intelligence-driven solutions to achieve the democratization of early MCI detection and enable timely interventions. 展开更多
关键词 Mild cognitive impairment Early detection Motor kinematics Gait analysis Handwriting analysis Digital biomarkers Machine learning
暂未订购
The Impact of Early Postoperative Rehabilitation Training on Balance Ability and Quality of Life in Elderly Patients with Hip Fracture
18
作者 Kaiyu Yang Xiaofang Peng Li Xu 《Journal of Clinical and Nursing Research》 2026年第1期394-399,共6页
Objective:To analyze the improvement effect of early postoperative rehabilitation training on balance ability and quality of life in elderly patients with hip fracture.Methods:A total of 50 elderly patients with hip f... Objective:To analyze the improvement effect of early postoperative rehabilitation training on balance ability and quality of life in elderly patients with hip fracture.Methods:A total of 50 elderly patients with hip fracture admitted to our hospital from January 2023 to January 2024 were selected and divided into the observation group(25 cases)and the control group(25 cases)by random number table method.The control group received routine nursing,while the observation group received early rehabilitation training on the basis of routine nursing.The balance ability(Berg Balance Scale,BBS)and quality of life(SF-36)of the two groups were compared.Results:The BBS scores of the observation group at all postoperative time points were significantly higher than those of the control group(p<0.05),and the quality-of-life scores of the observation group were also significantly higher than those of the control group(p<0.05).Conclusion:Early postoperative rehabilitation training for elderly patients with hip fracture can improve their balance ability,enhance their quality of life,and reduce the incidence of postoperative complications,which is worthy of clinical promotion. 展开更多
关键词 Elderly hip fracture Early postoperative rehabilitation training Balance ability Quality of life COMPLICATIONS
暂未订购
Non-right-handedness and psychiatric disorders:A synthesis of epidemiological,genetic,and neurobiological evidence
19
作者 Qing-Qing Wang Zhong-Sheng Sun Jie-Si Wang 《World Journal of Psychiatry》 2026年第1期20-31,共12页
Non-right-handedness(NRH),encompassing left-handedness and mixed-handedness,has been frequently reported at elevated rates in individuals with various psychiatric disorders.The consistency of this association across m... Non-right-handedness(NRH),encompassing left-handedness and mixed-handedness,has been frequently reported at elevated rates in individuals with various psychiatric disorders.The consistency of this association across multiple conditions and its underlying mechanisms is the subject of ongoing investigation.This review synthesized current evidence to explore the association between NRH and psychiatric disorders from epidemiological,genetic,and neurobiological perspectives.We systematically identified and appraised relevant literature investigating NRH prevalence in psychiatric populations and potential explanatory mechanisms.Epidemiological evidence indicates an elevated prevalence of NRH,particularly within neurodevelopmental disorders.Potential contributing mechanisms identified include early developmental disruptions,shared genetic predispositions,and atypical patterns of brain lateralization.While the association between NRH and psychiatric conditions,especially neurodevelopmental disorders,is evident,the causal pathways and relative contributions of identified mechanisms are complex and debated.This review highlighted key areas requiring further research to elucidate these relationships. 展开更多
关键词 HANDEDNESS Psychiatric disorder Neurodevelopmental disorders Brain lateralization/asymmetry Interhemispheric connectivity Early developmental disruption
暂未订购
Paediatric Audiology:An analysis of stakeholder perspectives on advancement in Early Hearing Detection and Intervention for deaf infants in Nigeria
20
作者 Albert Ulutorti Green Amalachukwu Okwukweka Odita +5 位作者 Christian Chukwuemeka Ifezulike Confidence Uchenna Gabriel Onyinyechukwu Joy Onyewuchi Nancy Chinelo Onyema Blessing Chinaza Nwanozie Joy Okwumuo 《Journal of Otology》 2026年第1期65-71,共7页
Background:Early Hearing Detection and Intervention(EHDI)plays a critical role in improving language,cognitive,and socio-emotional outcomes for infants with hearing loss.In Nigeria,however,EHDI implementation remains ... Background:Early Hearing Detection and Intervention(EHDI)plays a critical role in improving language,cognitive,and socio-emotional outcomes for infants with hearing loss.In Nigeria,however,EHDI implementation remains limited by fragmented service delivery,uneven technological capacity,and sociocultural factors that delay timely diagnosis.This study explored the perspectives of paediatric audiologists and parents to provide a comprehensive understanding of the opportunities and challenges influencing early hearing care across diverse Nigerian settings.Methods:A mixed-methods design was employed across audiology facilities selected systematically from four Nigerian geopolitical zones.Twenty-five paediatric audiologists and twenty-three parents of children with congenital hearing loss participated.Quantitative data were collected using a structured questionnaire assessing awareness,diagnostic access,and intervention experiences.Qualitative data were obtained through semi-structured interviews and two focus group discussions.Thematic analysis followed Braun and Clarke's six-step framework,with dual coding,external auditing,and member validation to enhance credibility.Results:Quantitative findings demonstrated broad agreement on the diagnostic value of otoacoustic emissions(OAEs)and automated auditory brainstem responses(AABRs),the developmental benefits of early intervention,and the importance of active parental involvement.However,respondents identified persistent barriers including high costs of screening and therapy,poor public awareness of early hearing loss symptoms,and a critical shortage of trained personnel,and unequal distribution of diagnostic tools,particularly in rural and northern regions.Thematic analysis further underscored disparities in diagnostic capacity,sociocultural interpretations of deafness that delay clinical consultation,and economic constraints that hinder continuity of care.While families who accessed early intervention reported improved communication,social engagement,and learning readiness in their children,systemic gaps continue to limit widespread success.Conclusions:Despite growing technological capacity and awareness of EHDI benefits,significant structural,financial,and sociocultural challenges continue to impede timely diagnosis and intervention in Nigeria.Strengthening national policies,ensuring equitable distribution of diagnostic tools,expanding professional training,subsidising services,implementing culturally sensitive awareness campaigns and integration of Universal Newborn Hearing Screening into routine postnatal care are essential to improving outcomes for deaf infants. 展开更多
关键词 Paediatric audiology Advancement Early hearing detection and intervention Deaf infants
暂未订购
上一页 1 2 180 下一页 到第
使用帮助 返回顶部