Gait analysis is indispensable technology in the design of exoskeleton robot.Using human gait motion law as the foundation of the lower limb exoskeleton motion attitude control,it is benefit for the achievement of good man-machine matching.The Vicon motion analysis system is used for kinematic experiments and analysis.On the basis of human-computer interaction,human function of motion is expanded,so it gets extensive attention and application in the lower limb dysfunction patients rehabilitation training,the elderly,and people power to walk,and individual equipment.Aimed at improving the function matching of human and machine,Vicon motion system was adopted in a gait analysis experiment to obtain gait parameters for the motion controlling of lower extremity exoskeleton.Dynamic parameters were obtained from combining of ADAMS simulation and Lagrange equation calculation.A lower extremity exoskeleton virtual prototype was realized with walking booster function and low-cost feature.

The Ning-Wu volcanic basin is an important part of the Middle-Lower Yangtze River Valley metallogenic belt in eastern China, where magnetite-apatite deposits are common. These magnetite-apatite deposits can be classified into two types. The first type includes the Washan, Taocun, Heshangqiao and Dongshan deposits, which are hosted in diorite porphyry and adjacent volcanic rocks. The second type includes Gushan, Baixiangshan and Hemushan deposits, developed at the contact between gabbro-diorite and sedimentary rocks. We used Ar-40-Ar-39 dating on phlogopite and U-Pb LA-ICP MS dating of zircon in ore-related diorite porphyry and gabbro-diorite to determine the timing of iron mineralization in the basin. The ages of the magnetite-apatite deposits such as Washan, Taocun, Heshangqiao Gushan Baixiangshan Hemushan deposits are from 130 Ma to 131 Ma. Thus the magnetite-apatite deposits in the Ning-Wu volcanic basin all formed at about 130 Ma, later than the skarn and porphyry Cu-Au deposits in the adjacent fault-uplift areas such as Edongnan, Jiu-Rui, Anqing-Guichi and Tongling clusters that are between 146 Ma and 135 Ma. Based on available petrological and geochemical data, the magnetite-apatite deposits in the Ning-Wu volcanic basin are interpreted to have formed under regional lithospheric extension and thinning, and ore-forming elements were derived from basaltic melts sourced from enriched lithospheric mantle and the crust. (C) 2013 Published by Elsevier Ltd.

The overall program and working principle of the walking aid which was designed to assist patients with lower limb paralysis to walk again was analyzed in this paper.Dimensions of each rod were determined according to the data of human body structure measured by ergonomics and geometric relations of the mechanism.A three-dimensional prototype model of the walking aid was established in CATIA.Motion simulation was carried out on mechanism in ADAMS.Parameters as velocity,torque and etc.of the walking aid were determined,which were compared with normal gait parameter of healthy human,both the design rationality and the feasibility of scheme for the mechanism was validated.

The authors take the functional design as the starting point to design drive for lower limb exoskeletons.And that is obviously different from the design idea which is based on simulating the muscle motion of human leg to the design of lower limbs exoskeletons’drive mechanism.Because of the complexity of the lower limb movement,traditional drive is very difficult and costly to realize the control of the complex movement well.So the authors propose to use the complex gait curve to design the contour of CAM in a reverse way and take the CAM as the drive mechanism of the lower limbs exoskeletons.The CAM drive mechanism can masterly avoid the difficult problem of the lower limbs exoskeletons’motion control.According to the existing problems that the CAM drive mechanism cannot adapt to the timely adjusting of gait,the authors also make a construction compensation in this essay to make exoskeletons’speed can changes within a certain range.

The Anhui area along the Yangtze River is an important locality of the pyrite in China,and the volcanic-subvolcanic gas-liquid pyrite is its main genetic type.Through summarizing the geological characteristics of the volcanic-subvolcanic gas-liquid pyrites and analyzing their pyrite-forming geological conditions,the research areas are divided into 246 statistic units with the grid of 5 km×5 km.First the multiple geological information(including stratum,rock mass,fault,etc) of 20 volcanic-subvolcanic gas-liquid pyrites is extracted,and then seven prediction variables are extracted according to the weight of metallogenic factors by the approach of characteristic analysis.Finally the possible location of the volcanic-subvolcanic gas-liquid pyrite is predicted.The perspective mineralization zones of three levels are obtained.The prediction results can provide a scientific basis for further volcanic-subvolcanic gas-liquid pyrite prospecting in Anhui area along the Yangtze River.

The Ning-Wu (Nanjing-Wuhu) Basin is one of the most important volcanic basins in the Middle-Lower Yangtze River Valley, eastern China. It consists of four volcanic units, i.e., the Longwangshan, Dawangshan, Gushan, and Niangniangshan Formations. Their LA-ICP MS U-Pb zircon ages are 134.8±1.8, 132.2±1.6, 129.5±0.8, and 126.8±0.6 Ma, respectively. Results of this study indicate that all volcanic rocks in the Ning-Wu Basin were formed in the Early Cretaceous from 135 to 127 Ma, lasting 8–10 m.y. No Jurassic volcanic activities occurred in any of the volcanic basins of the Middle-Lower Yangtze River Valley, including the Ning-Wu Basin. These new chronological results provide significant evidence for further study of this region to improve our understanding of Mesozoic tectonic, magmatic, and metallogenic processes of eastern China.

宁芜盆地是长江中下游地区最重要的火山岩盆地之一,发育有龙王山、大王山、姑山和娘娘山4组以安山质火山岩为主的地层.通过对4组火山岩中熔岩的锆石LA-ICP MS同位素定年,得到各组火山岩形成的时间分别为:龙王山组(134.8±1.3)Ma、大王山组(132.2±1.6)Ma、姑山组(129.5±0.8)Ma和娘娘山组(126.6±1.1)Ma.宁芜盆地内火山岩皆形成于早白垩世,火山岩浆活动发生的起止时间约为135-127Ma,持续时间在8-10Ma左右.包括宁芜盆地在内的长江中下游地区各火山岩盆地均不存在侏罗纪火山岩浆活动.研究结果为进一步探讨和认识长江中下游及中国东部中生代构造-岩浆-成矿作用提供了新的年代学成果.

PET is the base material of laminating pouch film. The PET film surface coating layer with good low-temperature hot glue, the EE, EVA or EAA material. Just like the recycling of EVA and PET composite plastic film, how to achieve the separation of EVA and PET by technology and processes may be key of the plastic recycling. This paper describes a through improving the traditional float-sink technical process in order to realize the continuity of production of plastic separation recycling of new technology. Otherwise, the key of the new process is that we added physical separation equipment and procedures before the process of float-sink. And we also improve the degree of automation, ultimately separation rate and productivity greatly improved.

Assessment of heavy metal contamination in aquatic sediments is an important part of current theoretical study of water-environment pollution.The major assessment methods of heavy metal contamination in sediments which are used currently are summarized,a comparative study is made,and their applicability,merits and demerits are analyzed.The feasible principle and methods for assessing the heavy metal pollution are put forward.

Reservoirs in Es4 member of Hubuzhai structure of Dongpu Depression are tight with fracture development, which are high angle and unfilling shear fractures with obvious characteristics of grouping. On the basis of core description, integral fracture recognition, lithomechanics test, 3D finite element numerical simulation is used to quantitatively predict fractural growth characteristics and distribution rules of Es4 low permeability and tight sandstones in the area. The result shows that fractures in well block of Well b1-1-b1-2, Well v353. Well v318 are highly developed, growing degree is low in the east of Well b2.