mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Cytogenetics and germplasm enrichment in Brassica allopolyploids in China

This paper reviews research advances in cytogenetics and germplasm innovation in Brassica allopolyploids, particularly oilseed rape (Brassica napus), in China. Three naturally evolved Brassica allotetraploid species are cytologically stable but tend to preferentially lose several chromosomes from one subgenome when induced by alien chromosome elimination. A-subgenome is extracted from B. napus, and the ancestral Brassica rapa was restituted after the total loss of C-subgenome chromosomes. Genome-wide genetic and epigenetic alterations were observed in both natural and synthetic Brassica allotetraploids. B. napus was subjected to extensive interspecific hybridization with landraces of B. rapa and Brassica juncea, which exhibit abundant phenotype variations, to widen the genetic diversity in breeding and select numerous elite germplasm resources and cultivars; these cultivars include the representative Zhongyou 821, which also parented numerous other varieties. Novel B. napus genotypes were obtained using Brassica trigenomic hybrids and allohexaploids (2n=54, AABBCC) by combining subgenomes from extant allotetraploids and diploids as bridge. Alien additions, substitutions, and translocations of the B. napus genome were developed by intergeneric/intertribal sexual and somatic hybridizations with several crucifers. Furthermore, mitochondrial DNA recombination promoted the production of novel cytoplasmic male sterile lines.
Transgenic approaches for improving use efficiency of nitrogen, phosphorus and potassium in crops

The success of the Green Revolution largely relies on fertilizers, and a new Green Revolution is very much needed to use fertilizers more economically and efficiently, as well as with more environmental responsibility. The use efficiency of nitrogen, phosphorus, and potassium is controlled by complex gene networks that co-ordinate uptake, re-distribution, assimilation, and storage of these nutrients. Great progress has been made in breeding nutrient-efficient crops by molecularly engineering root traits desirable for efficient acquisition of nutrients from soil, transporters for uptake, redistribution and homeostasis of nutrients, and enzymes for efficient assimilation. Regulatory and transcription factors modulating these processes are also valuable in breeding crops with improved nutrient use efficiency and yield performance.
急性黄斑区神经视网膜病变一例

AMNR病因不明,治疗也无统一标准,糖皮质激素、免疫抑制剂、抗病毒药物能否改变病程也未证实。同时,文献提示本病可自发完全缓解,也可造成永久性视力下降。对本病的正确认识有助于向患者合理解释预后,避免误诊所造成的过度治疗以及过度治疗所产生的并发症。
Economic ‘‘Activity-Silent'' Synaptic Mechanisms of Working Memory

Working memory (WM) allows humans to hold necessary information in temporary storage and manipulate such information online for higher-order cognitive functions, such as language understanding, decision making, and problem solving. Since its first appearance in the science of psychology in the 1960s, many theories have sought to elucidate the nature of WM. The most accepted model is the multicomponent model, which was first introduced by Baddeley and Hitch [1]. However, a state-based model is becoming more promising with the development of neuroscience [2]. Despite a variety of versions of the model, both theories propose that memory representations of information that is held in WM are maintained in an elevated state of activation until the information is no longer relevant to the current target. The state-based model has been extensively investigated in neuroimaging studies. Postle and colleagues isolated the state of attention from WM and proposed a new theory—‘‘activity-silent'' synaptic mechanisms—for maintaining information in WM, which is more economical and fine-tuned [3]. These authors applied transcranial magnetic stimulation (TMS) to reactivate neural representations and illustrated a mechanism of short-term plasticity in a recent paper in Science [4].
Mapping the Information Trace in Local Field Potentials by a Computational Method of Two-Dimensional Time-Shifting Synchronization Likelihood Based on Graphic Processing Unit Acceleration

The local field potential (LFP) is a signal reflecting the electrical activity of neurons surrounding the electrode tip. Synchronization between LFP signals provides important details about how neural networks are organized. Synchronization between two distant brain regions is hard to detect using linear synchronization algorithms like correlation and coherence. Synchronization likelihood (SL) is a non-linear synchronization-detecting algorithm widely used in studies of neural signals from two distant brain areas. One drawback of non-linear algorithms is the heavy computational burden. In the present study, we proposed a graphic processing unit (GPU)-accelerated implementation of an SL algorithm with optional 2-dimensional time-shifting. We tested the algorithm with both artificial data and raw LFP data. The results showed that this method revealed detailed information from original data with the synchronization values of two temporal axes, delay time and onset time, and thus can be used to reconstruct the temporal structure of a neural network. Our results suggest that this GPU-accelerated method can be extended to other algorithms for processing time-series signals (like EEG and fMRI) using similar recording techniques.
Dynamics and origin of cytokinins involved in plant manipulation by a leaf-mining insect

Several herbivorous insects and plant-associated microorganisms control the phytohormonal balance, thus enabling them to successfully exploit the plant by inhibiting plant defenses and withdrawing plant resources for their own benefit. The leaf-mining moth Phyllonorycter blancardella modifies the cytokinin (CK)profile of mined leaf-tissues, and the insect symbiotic bacteria Wolbachia is involved in the plant manipulation to the benefit of the insect host. To gain a deeper understanding into the possible origin and dynamics of CKs, we conducted an extensive characterization of CKs in larvae and in infected apple leaves. Our results show the enhanced CK levels in mines, both on green and yellow leaves, allowing insects to control their nutritional supply under fluctuating environmental conditions. The spatial distribution of CKs within the mined leaves shows that hormone manipulation is strictly limited to the mine suggesting the absence of CK translocation from distant leaf areas toward the insect feeding site. Mass spectrometry analyses reveal that major CK types accumulating in mines and larvae are similar to what is observed for most gall-inducers, suggesting that strategies underlying the plant manipulation may be shared between herbivorous insects with distinct life histories. Results further show that CKs are detected in the highest levels in larvae, reinforcing our hypothesis that CKs accumulating in the mines originate from the insect itself. Presence of bacteria-specific methylthio-CKs is consistent with previous results suggesting that insect bacterial symbionts contribute to the observed phenotype. Our study provides key findings toward the understanding of molecular mechanisms underlying this intricate plant-insect-microbe interaction.
Endophytic fungi alter sucking bug responses to cotton reproductive structures

All plants including cotton host a wide range of microorganisms as endophytes. There is a growing appreciation of the prevalence, ecological significance and management potential of facultative fungal endophytes in protecting plants from pests, pathogens and environmental stressors. Hemipteran sucking bugs have emerged as major pests across the U.S. cotton belt, reducing yields directly by feeding on developing reproductive structures and indirectly by vectoring plant pathogens. We used no-choice and simultaneous choice assays to examine the host selection behavior of western tarnished plant bugs (Lygus hesperus)and southern green stink bugs (Nezara viridula)in response to developing flower buds and fruits from cotton plants colonized by 1 of 2 candidate beneficial fungal endophytes, Phialemonium inflatum or Beauveria bassiana. Both insect species exhibited strong negative responses to flower buds (L. hesperus)and fruits (N. viridula)from plants that had been colonized by candidate endophytic fungi relative to control plants under both no-choice and choice conditions. Behavioral responses of both species indicated that the insects were deterred prior to contact with plant tissues from endophyte-colonized plants, suggesting a putative role for volatile compounds in mediating the negative response. Our results highlight the role of fungal endophytes as plant mutualists that can have positive effects on plant resistance to pests.
The influence of bacteria on multitrophic interactions among plants, psyllids, and pathogen

The recent emergence of several plant diseases caused by psyllid-borne bacterial pathogens worldwide (Candidatus Liberibacter spp.)has created renewed interest on the interaction between psyllids and bacteria. In spite of these efforts to understand psyllid association with bacteria, many aspects of their interactions remain poorly understood. As more organisms are studied, subtleties on the molecular interactions as well as on the effects of the bacteria on the psyllid host are being uncovered. Additionally, psyllid-borne bacterial phytopathogens can also affect the host plant, which in turn can impact psyllid physiology and behavior. Here, we review the current literature on different aspects of the influence of bacteria on multitrophic interactions among plants, psyllids, and pathogens. We then highlight gaps that need to be addressed to advance this field, which can have significant implications for controlling these newly emergent and other plant diseases.
Discovery of a novel calcium-sensitive fluorescent probe for α-ketoglutarate

α-Ketoglutarate (a-KG), a pivotal metabolite in energy metabolism, has been implicated in nonalcoholic fatty liver disease (NAFLD) and several cancers. It is recently proposed that plasma a-KG is a surrogate biomarker of NAFLD. Here, we report the development of a novel "turn-on" chemosensor for a-KG that contains a coumarin moiety as a fluorophore. Using benzothiazole-coumarin (BTC) as inspiration, we designed a probe for calcium ion recognition that possesses a unique fluorophore compared with previously reported probes for a-KG measurement. This chemosensor is based on the specific Schiff base reaction and the calcium ion recognition property of the widely used calcium indicator BTC. The probe was synthesized, and a series of parallel experiments were conducted to optimize the chemical recognition process. Compared to the initial weak fluorescence, a remarkable 7.6-fold enhancement in fluorescence intensity (I/I_0 at 495 nm) was observed for the conditions in which the probe (1 µmol/L), α-KG (50 µmol/L),and Ca~(2+) (100 µmol/L) were incubated at 30 ℃ in EtOH. The probe displayed good selectivity for a-KG even in an environment with an abundance of amino acids and other interfering species such as glutaric acid. We determined that the quantitative detection range of a-KG in EtOH was between 5 and 50 µmol/L. Finally, probe in serum loaded with a-KG (10 mmol/L) showed a 7.4-fold fluorescence enhancement. In summary, a novel probe for detecting the biomarker a-KG through a typical Schiff base reaction has been discovered. With further optimization, this probe may be a good alternative for detecting the physiological metabolite α-KG.
Experimental and analytical studies on multiple tuned mass dampers for seismic protection of porcelain electrical equipment

Porcelain electrical equipment (PEE),such as current transformers,is critical to power supply systems,but its seismic performance during past earthquakes has not been satisfactory.This paper studies the seismic performance of two typical types of PEE and proposes a damping method for PEE based on multiple tuned mass dampers (MTMD).An MTMD damping device involving three mass units,named a triple tuned mass damper (TTMD),is designed and manufactured.Through shake table tests and finite element analysis,the dynamic characteristics of the PEE are studied and the effectiveness of the MTMD damping method is verified.The adverse influence of MTMD redundant mass to damping efficiency is studied and relevant equations are derived.MTMD robustness is verified through adjusting TTMD control frequencies.The damping effectiveness of TTMD,when the peak ground acceleration far exceeds the design value,is studied.Both shake table tests and finite element analysis indicate that MTMD is effective and robust in attenuating PEE seismic responses.TTMD remains effective when the PGA far exceeds the design value and when control deviations are considered.
Model-based framework for multi-axial real-time hybrid simulation testing

Real-time hybrid simulation is an efficient and cost-effective dynamic testing technique for performance evaluation of structural systems subjected to earthquake loading with rate-dependent behavior.A loading assembly with multiple actuators is required to impose realistic boundary conditions on physical specimens.However,such a testing system is expected to exhibit significant dynamic coupling of the actuators and suffer from time lags that are associated with the dynamics of the servo-hydraulic system,as well as control-structure interaction (CSI).One approach to reducing experimental errors considers a multi-input,multi-output (MIMO) controller design,yielding accurate reference tracking and noise rejection.In this paper,a framework for multi-axial real-time hybrid simulation (maRTHS) testing is presented.The methodology employs a real-time feedback-feedforward controller for multiple actuators commanded in Cartesian coordinates.Kinematic transformations between actuator space and Cartesian space are derived for all six-degrees-of-freedom of the moving platform.Then,a frequency domain identification technique is used to develop an accurate MIMO transfer function of the system.Further,a Cartesian-domain model-based feedforward-feedback controller is implemented for time lag compensation and to increase the robustness of the reference tracking for given model uncertainty.The framework is implemented using the 1/5th-scale Load and Boundary Condition Box (LBCB) located at the University of Illinois at Urbana-Champaign.To demonstrate the efficacy of the proposed methodology,a single-story frame subjected to earthquake loading is tested.One of the columns in the frame is represented physically in the laboratory as a cantilevered steel column.For realtime execution,the numerical substructure,kinematic transformations,and controllers are implemented on a digital signal processor.Results show excellent performance of the maRTHS framework when six-degrees-of-freedom are controlled at the interface between substructures.
3D-CTA在自发性蛛网膜下腔出血中早期筛查的意义

自发性蛛网膜下腔出血(spontaneous subarachnoid hemorrhage,s-SAH)是指某些疾病引起的脑血管破裂,血液流至蛛网膜下腔出现的一组症状,是神经外科较常见的疾病,其中由颅内动脉瘤破裂引起的约占到50% ~ 80%,其次为动静脉畸形,还包括烟雾病、血管炎等。自发性蛛网膜下腔出血具有较高的致死率和致残率,因此,对其进行早期诊断和治疗具有重要意义。临床中常常采取数字减影血管造影(DSA)检查,是诊断颅内血管性疾病的“金标准”,但存在风险高,时间长,创伤大,易发生不良反应等缺点。随着CT的发展及图像后处理技术的完善,三维CT血管造影术(three-dimensional CT angiography,3D-CTA)以无创、便捷、价格低廉等优点,在自发性SAH诊断及制定合理的治疗方面日益显示出其独特的价值。本研究回顾性分析嘉兴学院附属第二医院2015年08月至2016年12月84例s-SAH患者三维CT血管造影(3D-CTA)、三维数字减影血管造影(3D-DSA)和手术资料,以探讨3D-CTA在s-SAH诊治中的应用价值。
级联型固态变压器整流级电压均衡控制策略

对于级联型固态变压器(SST),如果整流级输出直流电压不均衡,可能导致输入电流下降,H桥不平衡损耗,功率器件电压应力分配不均。因此提出在整流级采用电压均衡控制策略,解决输出电压不均衡的问题。但电压均衡控制器的引入会对原系统控制器产生耦合影响。为了解决整流级输出直流电压不均衡和耦合影响的问题,提出一种新颖的控制策略。该控制策略可以解决整流级输出电压不均衡的问题,同时能消除电压均衡控制器的引入对原系统控制器造成的耦合影响。通过Matlab/Simulink仿真分析,验证了所提出控制策略的可行性和有效性。
楔形复合材料结构铆接工艺优化

通过分析与试验的方法,针对某机型某部位楔形复合材料结构铆接存在的安装损伤问题,分析了损伤产生的原因,提出对铆接工艺进行改进优化。研究表明:采用优化后的铆接工艺能够很好地解决楔形复合材料结构铆接存在的安装损伤问题,具有实用性,并为其它楔形复合材料结构铆接提供有益的借鉴。
子宫内膜异位症合并子宫内膜息肉的发病风险及临床治疗现状

子宫内膜异位症(endometriosis,EMs)是指具有生长功能的子宫内膜组织出现在子宫腔被覆黏膜以外的身体其他部位,多见于30~40岁的育龄期妇女,发病率高达10%~15%[1]。子宫内膜息肉(endometrial polyps,EP)是最常见的宫腔良性病变之一,可引起不规则阴道出血、经量增多,并且可能与不孕及反复流产相关[2]。EMs患者同时伴有EP的发病率很高,约为47.6%~68.4%[3],而在EMs相关不孕症中EP的发病率更是明显升高[4-7]。虽然是两种不同的疾病,但都表现为子宫内膜雌激素依赖性生长过度,且均能导致不孕,因此两者可能存在相同的生理病理基础,进一步探讨其潜在发病机制,进一步阐明EMs的发病机制,有助于提高EMs的临床诊治率。现就EMs合并EP的发病风险和临床治疗现状作一综述。
干旱半干旱城市居任区雨水花园滲透分祈硏究

随着海绵城市理念的深入,雨水花园在城市建设中的应用越来越广泛。但是在我国北方干旱半干旱地区并没有完善的雨水花园应用理论体系。研究了以呼和浩特地区为代表的城市居住区雨水花园的建造及其砂质土壤渗透应用,重点考察渗透材料比选、植物配置筛选等关键问题,并提出建议。
Extractant (2,3-dimethylbutyl)(2,4,4/-trimethylpentyl)phosphinic acid (INET-3) impregnated onto XAD-16 and its extraction and separation performance for heavy rare earths from chloride media

(2,3-Dimethylbutyl)(2,4,4'-trimethylpentyl)phosphinic acid (INET-3) was impregnated onto dry macroporous resins XAD-16 and pretreated XAD-16 with ethyl alcohol and HC1 (Pre-XAD-16) to prepare the solvent impregnated resins SIRs-INET-3/XAD-16 and SIRs-INET-3/Pre-XAD-16. The molecular weight distribution of the low molecular weight (LMW) polymers washed off by ethyl alcohol during XAD-16 pretreatment was determined by gel permeation chromatography (GPC). The macroporous resins (XAD-16 & Pre-XAD-16),the corresponding solvent impregnated resins (SIRs-INET-3/XAD-16 & SIRs-INET-3/Pre-XAD-16) and the PVA coated SIRs-INET-3/Pre-XAD-16 with boric acid as cross-linking agent were characterized by FT-IR,SEM-EDS and TGA. The effects of XAD-16 pretreatment and PVA coating technology on RE(III) adsorption equilibrium time,INET-3 losses during extraction and adsorption capacity were investigated. The adsorption kinetics,selectivity and stripping behaviors of SIRs-INET-3/XAD-16 were further studied. The washed off LMW polymers had the Mn of 36,656,Mw of 40,310 and polydispersity coefficient of 1.10. The SIRs-INET-3/XAD-16 had shorter equilibrium time,less INET-3 loss and more Tm(III) adsorption capacity than the SIRs-INET-3/Pre-XAD-16. The PVA coated SIRs-INET-3/Pre-XAD-16 had less INET-3 loss and more Tm(III) adsorption capacity but longer equilibrium time than the uncoated SIRs-INET-3/Pre-XAD-16. The adsorption of RE(III) on the SIRs-INET-3/XAD-16 followed the pseudo-second-order kinetic model. The Tm(III) accumulative adsorption amounts onto SIRs-INET-3/XAD-16 after eight extraction stages was 23.6 mg/g. The separation factors of adjacent heavy RE(III)βEr/Ho,βTm/Er,βYb/Tm and βlu/yb values were 1.76,2.59,2.56 and 1.19,respectively. The adsorbed Lu(III) onto the SIRs-INET-3/XAD-16 can be stripped completely by 1.0 mol/ L H_2SO_4.
职业性急性硫化氢中毒二例临床分析

急性硫化氢(hydrogen sulfide,H_2S)中毒是常见的急性化学中毒,在生产、生活中时有发生。主要表现为神经系统、呼吸系统及多脏器功能损伤,严重可致死亡。我院近期成功救治2例职业性急性硫化氢中毒患者,现报道如下。
双肺弥漫结节与囊腔影

从本例患者诊治过程中得到的启示:(1)对于肿瘤标志物升高的患者,尤其是进行性升高者,应高度重视,并行相关检查排除肿瘤可能;(2)对于诊断不明的肺部疾病,应尽早行有创检查;(3)病理可能出现假阴性,临床不能完全依赖病理,一次活检阴性,并不能排除肿瘤可能。
A man-made object detection algorithm based on contour complexity evaluation

Man-made object detection is of great significance in both military and civil areas, such as search-and-rescue missions at sea, traffic signs recognition during visual navigation, and targets location in a military strike. Contours of man-made objects usually consist of straight lines, corner points, and simple curves. Motivated by this observation, a man-made object detection method is proposed based on complexity evaluation of object contours. After salient contours which keep the crucial information of objects are accurately extracted using an improved mean-shift clustering algorithm, a novel approach is presented to evaluate the complexity of contours. By comparing the entropy values of contours before/after sampling and linear interpolation, it is easy to distinguish between man-made objects and natural ones according to the complexity of their contours. Experimental results show that the presented method can effectively detect man-made objects when compared to the existing ones.
Methods for Force Analysis of Overconstrained Parallel Mechanisms: A Review

The force analysis of overconstrained PMs is relatively complex and difficult, for which the methods have always been a research hotspot. However, few literatures analyze the characteristics and application scopes of the various methods, which is not convenient for researchers and engineers to master and adopt them properly. A review of the methods for force analysis of both passive and active overconstrained PMs is presented. The existing force analysis methods for these two kinds of overconstrained PMs are classified according to their main ideas. Each category is briefly demonstrated and evaluated from such aspects as the calculation amount, the comprehensiveness of considering limbs' deformation, and the existence of explicit expressions of the solutions, which provides an important reference for researchers and engineers to quickly find a suitable method. The similarities and differences between the statically indeterminate problem of passive overconstrained PMs and that of active overconstrained PMs are discussed, and a universal method for these two kinds of overconstrained PMs is pointed out. The existing deficiencies and development directions of the force analysis methods for overconstrained systems are indicated based on the overview.
外泌体与肿瘤关系的研究进展

外泌体(又称外秘小体,exosomes)是一种能被多种活细胞分泌,直径为30~100nm,并广泛分布于多种体液中的微囊泡结构。近10年来研究发现外泌体富含蛋白质、DNA、RNA和脂质等生物活性分子,这些物质在肿瘤转移前微环境的形成、侵袭与转移中发挥重要的作用。外泌体以其独特的方式包裹着核酸和蛋白质,在细胞间有效稳定地发挥信息交流的作用。为更好地了解外泌体促进肿瘤发生发展的机制,该文将对外泌体的结构和生物学功能,以及在肿瘤微环境中如何影响肿瘤发生发展进行综述。
腹膜转移性上皮样血管内皮细胞瘤伴旺炽性间皮细胞增生类似于恶性间皮瘤一例

本例肿瘤主要需要与恶性间皮瘤区分,事实上冷冻切片诊断时本例首先考虑为恶性间皮瘤。(1)伴有血管瘤样生长方式的恶性间皮瘤,与血管肉瘤相似,两者均可表现为管乳头状生长以及血管瘤样结构,因而易于混淆。
胞外膜泡与系统性硬化病的关系及应用展望

胞外膜泡(extracellular vesicles)具有多种生理病理功能,可介导细胞间的通讯,参与炎症、免疫信号通路、血管生成、应激反应、细胞衰老、增殖和分化等过程,在自身免疫反应的诱导、维持、调节中也起重要作用。系统性硬化病(systemic sclerosis, SSc)是以皮肤纤维化、胶原增殖及血管病变为特点的全身多系统自身免疫性疾病,临床表现呈现很大的异质性,病理生理特征是内皮细胞异常激活、凋亡以及血管生成细胞数量减少,使新血管的生成受损;以血管壁炎症和凝血系统激活为特点的血管损伤在疾病的早期发生,并且是发病机制的核心。本文旨在探讨胞外膜泡在SSc病理机制中的作用及其潜在的临床应用价值。
老年人急性髓性白血病诱导治疗的决策

急性髓细胞白血病(AML)是最常见的急性白血病类型,老年人多见,平均发病年龄为68岁。尽管部分老年患者可通过化疗获益,但是老年患者普遍存在治疗不足的问题,这一群体的治疗相关病死率高,完全缓解率低,复发率高,生存期短。患者的预后差异取决于肿瘤和宿主特征,因此需要个体化的方法来进行治疗决策。通过评估疾病本身的危险因素及治疗的耐受性,可有助于为患者选择正确的治疗方案。
经皮内窥镜下腰椎间盘切除术治疗游离型腰椎间盘突出症的进展

自Kambin和Hijikata[1~3]介绍经皮腰椎间盘切除术以来,随着外科技术和器械的发展进步,经皮内窥镜下腰椎间盘切除术(percutaneous endoscopic lumbar discectomy, PELD)在近年来迅速发展。游离型腰椎间盘突出(migrated lumbar disc herniation,M-LDH)作为特殊的突出类型,采用PELD治疗具有创伤小、康复快的优势,但也存在术中神经根损伤、椎间盘残留等风险,且术者学习曲线长。笔者针对PELD治疗M-LDH的进展综述如下。
Effect of Optical Microcavity on Absorption Behavior of Homo-Tandem Organic Solar Cells

The optical microcavity effect of the homo-tandem solar cells is explored utilizing the transfer matrix method. Ultrathin silver can reduce the deadzone effect compared with graphene and PH1000,and leads to a factor of 1.07 enhancement for an electrical field in a metal microcavity. The enhancement is considered to be the fact that strong exciton-photon coupling occurs in the microcavity due to ultrathin Ag. On the basis of the optical enhancement effect,optical behaviors are manipulated by varying the microcavity length. It is confirmed that ultrathin silver can serve as an ideal interconnection layer as the active layer is ~150nm thick and the thickness ratio between front and rear active layers lies between 1:1 and 1:2.
Design of Broadband Metamaterial Absorbers for Permittivity Sensitivity and Solar Cell Application

A broadband and ultra-thin absorber for solar cell application is designed. The absorber consists of three layers,and the difference is that the four split ring resonators made of metal gold are encrusted in the gallium arsenide (GaAs) plane in the top layer. The simulated results show that a perfect absorption in the region from 481.2 to 684.0 THz can be obtained for either transverse electric or magnetic polarization wave due to the coupling effect between the material of GaAs and gold. The metamaterial is ultra-thin,having the total thickness of 56nm,which is less than one-tenth resonance wavelength,and the absorption coefficients at the three resonance wavelengths are above 90%. Moreover,the effective medium theory,electric field and surface current distributions are adopted to explain the physical mechanism of the absorption,and the permittivity sensing applications are also discussed. As a result,the proposed structure can be used in many areas,such as solar cell,sensors,and integrated photodetectors.