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    题名 作者 年代 出处 被引量
1Deformation mechanism of roadways in deep soft rock at Hegang Xing’an Coal Mine显示文摘Engineering geomechanics characteristics of roadways in deep soft rock at Hegang Xing'an Coal Mine were studied and the nature of clay minerals of roadway surrounding rock was analyzed. This paper is to solve the technical problems of high stress and the difficulty in supporting the coal mine, and provide a rule for the support design. Results show that mechanical deformation mechanisms of deep soft rock roadway at Xing'an Coal Mine is of ⅠABⅡABCⅢABCD type, consisting of molecular water absorption (the ⅠAB -type), the tectonic stress type + gravity deformation type + hydraulic type (the ⅡABC -type), and the ⅢABCD -type with fault, weak intercalation and bedding formation. According to the compound mechanical deformation mechanisms, the corresponding mechanical control measures and conversion technologies were proposed, and these technologies have been successfully applied in roadway supporting practice in deep soft rock at Xing'an Coal Mine with good effect. Xing'an Coal Mine has the deepest burial depth in China, with its overburden ranging from Mesozoic Jurassic coal-forming to now. The results of the research can be used as guidance in the design of roadway support in soft rock.Yang Xiaojie Pang Jiewen Liu Dongming Liu Yang Tian Yihong Ma Jiao Li Shaohua 2013International Journal of Mining Science and Technology2013,23,2:21
2Timing of Uranium Mineralization and Geological Implications of Shazijiang Granite-Hosted Uranium Deposit in Guangxi, South China: New Constraint from Chemical U-Pb Age显示文摘Miaoershan (MES ) 铀矿石地是在中国的最重要的铀来源,之一和许多另外的招待花岗石的铀存款在华南招待最大的 Chanziping carbonaceous-siliceous-pelitic 岩石类型铀存款。Shazijiang (SZJ ) 铀存款是 MES 铀矿石地里的代表性的招待花岗石的铀存款之一,位于 Ziyuan, Guangxi 省,华南。在 SZJ 存款的铀矿化作用主要与空间地在这个区域与 mafic 女同性恋被联系的石英和方解石静脉作为沥青铀矿发生。热水的改变包括 silicification,碳酸饱和和 hematitization。新沥青铀矿化学药品 U-Pb 地球年代学和 petrographic 证据提供预定限制和新卓见进 SZJ 铀存款的形成。第一铀矿化作用上演的结果表演在 97.5 湯漠 ? 桴 ? 敚慤杮愠摮 ? 潵畢慳瀠牥摩瑯瑩獥椠 ? 潣獮獩整瑮眠瑩 ? 潢桴愠祢獳污愠摮猠'T 畤瑣潩 ?Jincheng Luo Ruizhong Hu Shaohua Shi 2015Journal of Earth Science2015,26,6:21
3Dendritic Cells Transduced with SOCS1 Gene Exhibit Regulatory DC Properties and Prolong Allograft Survival显示文摘SOCS1 is a key regulator of cytokine signaling and is important for maintaining balance in the immune system. It is thought to participate in negative feedback loops in cytokine signaling and may be an important signal for the regulation of dendritic cell (DC) maturation. However, it remains unclear whether DCs transduced with SOCS1 exhibit characteristics of regulatory DCs and induce allogeneic T-cell hyporesponsiveness. In this study, we constructed adenoviral vector coding SOCS1 (Ad-SOCS1) that can efficiently increase SOCS1 gene expression in bone marrow-derived dendritic cells. DCs transduced with Ad-SOCS1 (DC-SOCS1) expressed low levels of costimulatory and MHC molecules, were resistant to maturation and activation stimulation, induced allogeneic T-cell hyporesponsiveness, and promoted the generation of regulatory-like T cells in vitro. DC-SOCS1 pretreatment significantly prolonged the survival of allografts and led to a substantial increase in the generation of regulatory T cells. Our data suggest that SOCS1 inhibits DC maturation and induces regulatory DC generation, therefore possessing therapeutic potential to prevent rejection in organ transplantation.Hong Fu Shaohua Song Fang Liu Zhijia Ni Xiaoyun Shen Liang Xiao Guoshan Ding Quanxing Wang 2009Cellular & Molecular Immunology2009,6,2:20
4Efficient Gene Targeting in Zebrafish Mediated by a Zebrafish-Codon-Optimized Cas9 and Evaluation of Off-Targeting Effect显示文摘Targeted genome modifications with the Cas9/gRNA system derived from the clustered regularly interspaced short palindromic repeat/CRISPR-associated(CRISPR/Cas)system have been successfully used in cultured human cells as well as in most model organisms,including zebrafish(Danio rerio),mouse,and fruit fly(Chang et al.,2013;Cong et al.,2013;Da Liu Zhanxiang Wang An Xiao Yutian Zhang Wenyuan Li Yao Zu Shaohua Yao Shuo Lin Bo Zhang 2014Journal of Genetics and Genomics2014,41,1:18
5Characteristics and Source Identification of Polycyclic Aromatic Hydrocarbons (PAHs) in Urban Soils: A Review显示文摘Polycyclic aromatic hydrocarbons(PAHs) are mainly produced by combustion processes and consist of a number of toxic compounds.They are always emitted as a mixture and have become a major type of pollutants in urban areas.The degree of soil contamination by PAHs is of special concern in areas immediately in proximity to cities with heavy traffic,factories,older buildings,and infrastructure.The accumulation of soil PAHs is also affected by non-anthropogenic factors,such as climate,vegetation,and soil property.This paper reviews three typical source identification techniques,including diagnostic ratios,positive matrix factorization,and principle components analysis.The advantages or disadvantages of these techniques are analyzed.It is recommended that multiple identification techniques be used to determine the sources in order to minimize the weaknesses inherent in each method and thereby to strengthen the conclusions for PAH source identification.WANG Chunhui WU Shaohua ZHOU Shenglu SHI Yaxing SONG Jing 2017Pedosphere2017,27,1:18
6Silicon intensity Mach–Zehnder modulator for single lane 100 Gb/s applications显示文摘In this paper, a substrate removing technique in a silicon Mach–Zehnder modulator(MZM) is proposed and demonstrated to improve modulation bandwidth. Based on the novel and optimized traveling wave electrodes,the electrode transmission loss is reduced, and the electro-optical group index and 50 Ω impedance matching are improved, simultaneously. A 2 mm long substrate removed silicon MZM with the measured and extrapolated 3 dB electro-optical bandwidth of >50 GHz and 60 GHz at the-8 V bias voltage is designed and fabricated.Open optical eye diagrams of up to 90 GBaud∕s NRZ and 56 GBaud∕s four-level pulse amplitude modulation(PAM-4) are experimentally obtained without additional optical or digital compensations. Based on this silicon MZM, the performance in a short-reach transmission system is further investigated. Single-lane 112 Gb∕s and 128 Gb∕s transmissions over different distances of 1 km, 2 km, and 10 km are experimentally achieved based on this high-speed silicon MZM.MIAOFENG LI LEI WANG XIANG LI XI XIAO AND SHAOHUA YU 2018Photonics Research2018,6,2:18
7Phosphorus recovery from wastewater by struvite crystallization:Property of aggregates显示文摘Struvite crystallization is a promising method to remove and recover phosphorus from wastewater to ease both the scarcity of phosphorus rock resources and water eutrophication worldwide. To date, although various kinds of reactor systems have been developed, supporting methods are required to control the struvite fines flushing out of the reactors. As an intrinsic property, aggregation is normally disregarded in the struvite crystallization process, although it is the key factor in final particle size and therefore guarantees phosphorus recovery efficiency. The present study developed a method to analyze the characteristics of struvite aggregates using fractal geometry, and the influence of operational parameters on struvite aggregation was evaluated. Due to its typical orthorhombic molecular structure, struvite particles are prone to crystallize into needle or rod shapes, and aggregate at the corners or edges of crystals. The determined fractal dimension(Dpf) of struvite aggregates was 1.52–1.31, with the corresponding range of equivalent diameter(d0.5) at 295.9–85.4 μm. Aggregates formed in relatively low phosphorus concentrations(3.0–5.0 mmol/L) and mildly alkaline conditions(pH 9.0–9.5) displayed relatively compact structures, large aggregate sizes and high aggregation strength. Increasing pH values led to continuous decrease of aggregate sizes, while the variation of Dpfwas insignificant. As to the aggregate evolution, fast growth in a short time followed by a long steady stage was observed.Zhilong Ye Yin Shen Xin Ye Zhaoji Zhang Shaohua Chen Jianwen Shi 2014Journal of Environmental Sciences2014,26,5:16
8Types,Characteristics and Significances of Migrating Pathways of Gas-bearing Fluids in the Shenhu Area,Northern Continental Slope of the South China Sea显示文摘The first marine gas hydrate expedition in China has been conducted by Guangzhou Marine Geological Survey in the Shenhu Area, northern continental slope of the South China Sea. Previous study has analyzed the P-T conditions, geophysical anomalies and saturation calculations of these gas hydrates, but has not documented in detail the migration of gas-bearing fluids in the study area. Based on the interpretations of 2D/3D seismic data, this work identified two types of migration pathways for gas-bearing fluids in the Shenhu area, i.e., vertical and lateral pathways. The vertical pathways(largescale faults, gas chimneys and mud diapirs) presented as steep seismic reflection anomalies, which could be traced downward to the Eocene source rocks and may penetrate into the Late Miocene strata. The deeper gases/fluids might be allowed migrating into the shallower strata through these vertical conduits. However, the distributions showed distinct differences between these pathways. Large-scale faults developed only in the north and northeast of the Shenhu area, while in the drilling area gas chimneys were the sole vertical migration pathways. Since the Pliocene, normal faults, detachment faults and favorable sediments have constituted the lateral pathways in the Shenhu gas hydrate drilling area. Although these lateral pathways were connected with gas chimneys, they exerted different effects on hydrate formation and accumulation. Gas-bearing fluids migrated upward along gas chimneys might further migrate laterally because of the normal faults, thereby enlarging the range of the chimneys. Linking gas chimneys with the seafloor, the detachment faults might act as conduits for escaping gases/fluids. Re-deposited sediments developed at the early stage of the Quaternary were located within the gas hydrate stability zone, so hydrates would be enriched in these favorable sediments. Compared with the migration pathways(large-scale faults and mud diapirs) in the LW3-1 deep-sea oil/gas field, the migration efficiency of the vertical pathways(composed of gas chimneys) in the gas hydrate drilling area might be relatively low. Description and qualitative discrimination of migration pathways in the Shenhu gas hydrate drilling area are helpful to further understand the relationship between good-quality deep source rocks and shallow, mainly biogenicallyproduced, hydrates. As the main source rocks of the Baiyun sag, lacustrine mudstones in the Wenchang and Enping Formations may provide thermogenic methane. Gas chimneys with relatively low migration efficiency created the vertical pathways. Caused by the Dongsha tectonic movement, the release of overpressured fluids might reduce the vertical migration rates of the thermogenic methane. The thick bathyal/abyssal fine-grained sediments since the Late Miocene provided migration media with low permeability. These preconditions may cause carbon isotopic fractionation ofthermogenic methane during long-distance vertical migrations. Therefore, although geochemical analyses indicate that the methane forming gas hydrate in the Shenhu area was mainly produced biogenically, or was mixed methane primarily of microbial origin, thermogenic methane still contribute significantly.SU Ming SHA Zhibin ZHANG Cuimei WANG Hongbin WU Nengyou YANG Rui LIANG Jinqiang QIAO Shaohua CONG Xiaorong LIU Jie 2017Acta Geologica Sinica(English Edition)2017,91,1:16
9Effects of Biochar and Super Absorbent Polymer on Substrate Properties and Water Spinach Growth显示文摘Most previous researches have focused on biochar application in agricultural soils; however, limited information is available concerning the effects of biochar amendment on greenhouse substrate properties. A greenhouse experiment was conducted to investigate effects of wheat straw biochar(0–160 m L L-1) and super absorbent polymer(SAP, 0.8 g L-1) on physical and chemical properties of a substrate based on spent pig litter compost and the growth of water spinach(Ipomoea aquatica Forsk). Total porosity, water-holding capacity, p H and electrical conductivity(EC) of the substrate significantly increased with increasing biochar rates, especially in the substrate without SAP. The values of p H and EC were significantly lower in the substrate with SAP than those without SAP at the high biochar application rates(100–160 m L L-1). The germination rates of water spinach decreased with increasing biochar rates when biochar was added alone(76.9%–83.7%), whereas the rates increased to 83.6%–85.8% when biochar was added in combination with SAP. Growth parameters of water spinach and nutrient uptake by shoots and roots increased with increasing biochar rates and reached the maximum values at the biochar rate of 100 m L L-1. There were significant cubic relationships between the uptake of nutrients(N, P, and K) and biochar rates, both with and without SAP addition. In order to avoid negative effects on plant growth,the biochar application rate should be controlled at an optimal level(100 m L L-1). The SAP addition not only enhanced the positive effects of biochar application on the properties of the substrate, but also inhibited the excessive rise of p H and EC following biochar additions, which led to better plant growth and enhanced nutrient uptakes by water spinach.FAN Ruqin LUO Jia YAN Shaohua ZHOU Yunlai ZHANG Zhenhua 2015Pedosphere2015,25,5:15
10^(15)N isotope fractionation in an aquatic food chain:Bellamya aeruginosa(Reeve) as an algal control agent显示文摘15N isotope tracer techniques and ecological modeling were adopted to investigate the fractionation of nitrogen,its uptake and transformation in algae and snail(Bellamya aeruginosa Reeve).Different algal species were found to differ in their uptake of nitrogen isotopes.Microcystis aeruginisa Ktz.demonstrated the greatest 15N accumulation capacity,with the natural variation in isotopic ratio(δ 15N) and the isotope fractionation factor(ε,‰) being the highest among the species investigated.The transformation and utilization of 15N by snails differed depending on the specific algae consumed(highest for Chlorella pyrenoidosa Chick.,lowest for M.aeruginisa).When snails was seeded in the experimental pond,the algae population structure changed significantly,and total algal biomass as well as the concentration of all nitrogen species decreased,causing an increase in water transparency.A model,incorporating several chemical and biological parameters,was developed to predict algal biomass in an aquatic system when snails was present.The data collected during this investigation indicated that the gastropods such as snails could significantly impact biological community and water quality of small water bodies,suggesting a role for biological control of noxious algal blooms associated with eutrophication.Shiqun Han Shaohua Yan Kaining Chen Zhenhua Zhang Rengel Zed Jianqiu Zhang Wei Song Haiqin Liu 2010Journal of Environmental Sciences2010,22,2:14
11A mussel-inspired supramolecular hydrogel with robust tissue anchor for rapid hemostasis of arterial and visceral bleedings显示文摘In recent years,the developed hemostatic technologies are still difficult to be applied to the hemostasis of massive arterial and visceral hemorrhage,owing to their weak hemostatic function,inferior wet tissue adhesion,and low mechanical properties.Herein,a mussel-inspired supramolecular interaction-cross-linked hydrogel with robust mechanical property(308.47±29.20 kPa)and excellent hemostatic efficiency(96.5%±2.1%)was constructed as a hemostatic sealant.Typically,we combined chitosan(CS)with silk fibroin(SF)by cross-linking them through tannic acid(TA)to maintain the structural stability of the hydrogel,especially for wet tissue adhesion ability(shear adhesive strength=29.66±0.36 kPa).Compared with other materials reported previously,the obtained CS/TA/SF hydrogel yielded a lower amount of blood loss and shorter time to hemostasis in various arterial and visceral bleeding models,which could be ascribed to the synergistic effect of wound closure under wet state as well as intrinsic hemostatic activity of CS.As a superior hemostatic sealant,the unique hydrogel proposed in this work can be exploited to offer significant advantages in the acute wound and massive hemorrhage with the restrictive access of therapeutic moieties.Ziwen Qiao Xueli Lv Shaohua He Shumeng Bai Xiaochen Liu Linxi Hou Jingjing He Dongmei Tong Renjie Ruan Jin Zhang Jianxun Ding Huanghao Yang 2021Bioactive Materials2021,6,9:14
12Modeling and optimal energy management of a power split hybrid electric vehicle显示文摘With the combination modes of engine and two electric machines,the power split device allows higher efficiency of the engine.The operation and of a power split HEV are analyzed,and the system dynamic model HEV is established event-driven for HEV forward system simulation dynamics controller design.Considering the mode,the fact the mode that the operation modes of is the are and the the is continuous theory.time-driven this for each structure selection of the controller built and the described finite with hybrid automaton control In control structure,process is depicted by the state mode machine(FSM).The multi-mode switch controller is designed to realize power distribution.Furthermore,vehicle operations programming are optimized,and finite the prediction nonlinear model horizon.predictive control(NMPC)strategy is applied by that implementing the dynamic(DP)and in the Comparative simulation The results optimal demonstrate strategy hybrid in control structure is effective feasible for HEV energy management design.NMPC is superior improving fuel economy.SHI DeHua WANG ShaoHua Pierluigi Pisu CHEN Long WANG RuoChen WANG RenGuang 2017Science China(Technological Sciences)2017,60,5:14
13Genome of Wild Mandarin and Domestication History of Mandarin显示文摘官员(柠檬 reticulata ) 是世界范围的最重要的柠檬庄稼之一。它的驯服被相信发生在华南,它是四几千年的官员耕作的中心之一。我们在 Nanling 区域附近收集了官员的自然野人口并且在附近栽培了 landraces。我们发现柠檬性的酸水平戏剧性地在栽培官员被减少。理解 ? 官员驯服的基因基础,我们 de novo 装配了野官员的一个草稿染色体并且分析了一套 104 个柠檬染色体。我们发现 Mangshan 官员是一种原始类型并且二个独立驯服事件发生了,分别地导致在北方和南方 Nanling 山的二组栽培官员(MD1 和 MD2 ) 。二个瓶颈和有效人口尺寸的二扩大为栽培官员的 MD1 组被识别。然而,在 MD2 组织 ? 在人口尺寸有长、连续的减少。MD1 和 MD2 官员从栽培 pummelo 种类显示出种间的基因渗入的不同模式。我们在官员的驯服期间在选择下面可能在基因在柠檬酸盐内容的规定包含了的 aconitate hydratase (ACO ) 识别了高分叉的一个区域,它是。这研究为现存野官员人口的地理起源提供具体基因证据并且使驯服和官员的进化历史清楚些。Lun Wang Fa He Yue Huang Jiaxian He Shuizhi Yang Jiwu Zeng Chongling Deng Xiaolin Jiang Yiwen Fang Shaohua Wen Rangwei Xu Huiwen Yu Xiaoming Yang Guangyan Zhong Chuanwu Chen Xiang Yan Changfu Zhou Hongyan Zhang Zongzhou Xie Robert M. Larkin Xiuxin Deng Qiang Xu 2018Molecular Plant2018,11,8:14
14BMP2 and VEGF promote angiogenesis but retard terminal differentiation of osteoblasts in bone regeneration by up-regulating Idl显示文摘不适当的 vascularization 限制骨头缺点的修理。以便改进 angiogenesis 并且加速成骨,有在骨头新生的基因修正的 co 有教养的房间的协同在这研究被调查。Endothelial 祖先房间(EPC ) 和骨头髓干细胞(BMSC ) 是有脉管的 endothelial 生长因素(VEGF ) 和骨头的基因的 transfected 形态基因的蛋白质 2 (BMP2 ) 由侵入人体气管粘膜的病菌分别地。co 有教养的房间,包括 BMSC + EPC, Ad-BMP2BMSC + EPC, BMSC + Ad-VEGFEPC,和 Ad-BMP2BMSC + 指定 Ad-VEGFEPC 组织为四个组,在 alginate 胶化上被播种然后肌内地植入进老鼠在 angiogenesis 和成骨上评估效果。VEGF 和 BMP2 能导致禁止者的 overexpression DNA 有约束力 1 (Id1 ) 显著地在 vitro 和增加支持了试管形成的基因在在培植以后的 Ad-BMP2BMSC + Ad-VEGFEPC 组的血容器的数量。不过, Id1 的 overexpression 延迟了造骨细胞和骨头形成的终端区别。后来,在 transcriptional 水平,钙小瘤,和碱的磷酸酶(高山) 活动的 osteogenic 基因表示证明渐渐的减少和最新形成的成骨区域的数量在 Ad-BMP2BMSC + Ad-VEGFEPC 组展出了小增加。这发现建议在 VEGFEPC 和 BMP2BMSCs 的 Id1 表示的一条平衡规定可能对为骨头新生的基于房间、基于基因的途径批评。Xiaobin Song Shaohua Liu Xun Qu Yingwei Hu Xiaoying Zhang Tao Wang Fengcai Wei 2011Acta Biochimica et Biophysica Sinica2011,43,10:13
15Genome-wide Identification and Classification of HSF Family in Grape, and Their Transcriptional Analysis under Heat Acclimation and Heat Stress显示文摘Heat stress is one of the most serious threats in viticulture. Heat shock transcription factors(HSFs) have been proven to be the most important transcriptional factor family in the plant response to heat. In this study, a total of 19 putative HSF genes(VHSFs) were identified from the 12 × Vitis vinifera Pinot Noir PN4002 genome, and their chromosomal location, phylogenetic tree, exon-intron structure and conserved motifs were also analyzed. In addition, these HSFs transcriptional profiles in Vitis vinifera 'Jingxiu'(weak heat tolerance) and Vitis davidii 'Tangwei'(strong heat tolerance) under heat stress(47℃) and heat acclimation(38℃) were presented. Only VHSF01, VHSF05, VHSF15 and VHSF18 among 19 VHSFs showed different transcriptional models in these two genotypes under the same treatment, suggesting that these four VHSFs may be important factors which result in a thermotolerance difference between 'Jingxiu' and 'Tangwei'. This study provides novel insights into the response of 19 VHSFs to heat stress in the grape and suggests that potential key VHSFs in grape thermotolerance have great implications for molecular breeding in grapes.LIU Guotian CHAI Fengmei WANG Yi JIANG Jinzhu DUAN Wei WANG Yuting WANG Fangfang LI Shaohua WANG Lijun 2018Horticultural Plant Journal2018,4,4:13
16Effects of culm carbohydrate partitioning on basal stem strength in a high-yielding rice population显示文摘Rice culm carbohydrate transport can simultaneously affect grain filling and stem lodging resistance by regulating non-structural carbohydrate(NSC) and structural carbohydrate(SC) contents. However, the relationship between carbohydrate transposition and culm strength is not well documented. Accordingly, a high-yielding hybrid rice cultivar(Y Liangyou 2) was tested under different N fertilization regimes at two locations, Taoyuan(a special high-yield eco-site), Yunnan province and Danyang(a representative eco-site of the middle and lower Yangtze), Jiangsu province, China. Significantly higher grain yield and basal stem strength were found at Taoyuan than Danyang under all N rates throughout the two-year experiment. At heading stage, soluble sugars, starch, cellulose and lignin contents of the basal culm at Taoyuan were significantly 132.0%, 73.7%, 1.2%, and 62.7% higher than those at Danyang, respectively. At 20 days after heading, soluble sugars and starch content at Taoyuan decreased significantly compared to Danyang, but lignin content remained higher. Culm carbohydrate transport to kernels at Taoyuan was significantly greater than that at Danyang, and the proportion of soluble sugars and starch was correspondingly 62.9%lower. However, the proportion of lignin and cellulose was 22.7% higher at Taoyuan than that at Danyang. Soluble sugars and starch partitioning were significantly reduced under an increased nitrogen application rate, but SC partitioning was little affected. There were significant positive correlations between basal culm bending stress and dry weight and cellulose and lignin proportions at both locations under all N rates, suggesting that the higher SC proportion at 20 days after heading was primarily responsible for culm strength.These results suggest that high-yielding rice populations with greater culm strength require both moderate NSC transport and greater SC accumulation.Jun Zhang Ganghua Li Qingyu Huang Zhenghui Liu Chengqiang Ding She Tang Lin Chen Shaohua Wang Yanfeng Ding Weijian Zhang 2017The Crop Journal2017,5,6:13
17Dynamics of vehicle-pavement coupled system based on a revised flexible roller contact tire model显示文摘A revised flexible roller contact tire model (RFRC tire model) is proposed, which considers not only the geometric and flexible filtering effect, but also tire damping and pavement displacement. A vehi- cle-pavement coupled system is modeled as a two DOF oscillator moving along a simply supported beam on a linear viscoelastic foundation. By using the Galerkin’s and Direct Integral method, dynamical responses of the vehicle-pavement coupled system are obtained based on the RFRC tire model and the traditional single point contact tire model (SPC tire model). The simulation results are compared with test data and the validity of the proposed RFRC tire model is verified. Differences between the two models are also investigated. It is found that the dynamical behaviors for both models agree with each other quite well when road surface roughness is a long harmonic wave. On the other hand, they are different under short harmonic wave or impulse road excitation. Thus the RFRC tire model should be used to compute the tire force and investigate dynamical responses of vehicle and pavement.YANG ShaoPu LI ShaoHua LU YongJie 2009Science China(Technological Sciences)2009,52,3:13
18Species composition and distribution of marine nematode community in the North Taiwan Strait显示文摘Marine free-living nematodes were investigated at 13 sampling stations divided into three transects in the northern Taiwan Strait in February 1998. One hundred species of marine nematodes belonging to 91 Genera 28 Families 3 Orders were identified and were first recorded in the northern Taiwan Strait. The dominant species were Vasostoma sp., Sabatieria sp. 1, Linhystera sp. 1, Spilophorella sp., Daptonema sp., Halalaimus sp. and Dorylaimopsis variabilis. Their main densities were all over 4 950 ind./m2. According to mean density at transects, marine nematode density decreased from coastal Weitou to off Minjiang Estuary, which was similar to polychaete distribution in northern Taiwan Strait. The selective deposit feeder (1A) was the dominant food type of marine nematodes in the northern Taiwan Strait, but non-selective deposit feeders (1B) and epigrowth feeders (2A) occupied high proportion, indicating diverse feeding types of marine nematodes in the northern Taiwan Strait. Some environmental factors such as currents are discussed.Cai Lizhe, Hong Huasheng, Zou Chaozhong, Fang Shaohua, Lu Xiaomei, Zhang Yueping (1. Key Laboratory of SEDC of Marine Environmental Science/Environmental Science Research Center, Xiamen Universi- ty, Xiamen 361005, China 2. Department of Biology, Xiamen 2001Acta Oceanologica Sinica2001,20,2:12
19Field investigations of high stress soft surrounding rocks and deformation control显示文摘Field investigations of high stress soft rock deformations show that the high stress soft rock roadway can slide with large deformation. Severe extrusion and floor heave can also be subsequently observed. The supported roadway can be locally damaged or completely fail, where the floor has a large deformation and/or is seriously damaged. The factors inducing large deformation of surrounding rocks in deep roadway are rock strengths, structure face cutting types, stress states, stress release, support patterns,and construction methods. Based on the deformation characteristics of high stress soft rock roadway, a comprehensive support scheme is proposed. The overall support technology of 'step-by-step and joint,hierarchical reinforcement' for roadway is presented, and the anchor cable and bolt parameters to check the design methods are also given. Finally, the proposed comprehensive support method 'bolt t metal mesh t U-steel arch t shortcrete t grouting and cable' is used in the extension section of east main haulage roadway at 850 m level of Qujiang coal mine. The 173-day monitoring results show that the average convergence of sidewalls reaches 208 mm, and the average relative convergence of roof and floor reaches 448 mm, suggesting that this kind of support technology for controlling large deformation of high stress soft surrounding rock roadway is effective.Weijian Yu Weijun Wang Xinyuan Chen Shaohua Du 2015Journal of Rock Mechanics and Geotechnical Engineering2015,7,4:12
20Microstructure and mechanical properties of forged Al-7.1Zn-1.1Mg-1.6Cu-0.14Zr alloy after two-step ageing treatment at 120 and 170℃显示文摘The tensile properties,electrical conductivity,and microstructure of the forged Al-7.1Zn-1.1Mg-1.6Cu-0.14Zr alloy were investigated after a two-step ageing treatment at 120 and 170℃.The results indicate that the strength of the alloy reaches the peak value at 170℃ for 1 h during the second step ageing and then decreases sharply.However,the electrical conductivity value increases continuously with the second ageing time increasing.The fracture mechanism of the alloy is intergranular fracture for 1 h and then changes to dimple transgranular fracture later,and the toughness of the alloy is improved significantly.The phases of η' and η are major precipitates in the alloy under the two-step ageing condition.Discontinuous grain boundary precipitates and precipitate-free zones along the grain boundary are clearly observed.WANG Shaohua ZHANG Xingguo YANG Shoujie FANG Canfeng HAO Hai DAI Shenglong 2010Rare Metals2010,29,4:12
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