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Copyright of Journal of Xi'an Jiaotong University is the property of Editorial Office of Journal of Xi'an Jiaotong University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study investigates the creep-fatigue behavior of recrystallized zirconium alloy at 320 °C and different hydrogen contents using frequency-corrected strain life and frequency-corrected hysteresis energy methods. The results indicate that as the holding time increases, the creep-fatigue resistance of the non-hydrogen permeation sample decreases, but there is no significant effect when holding time exceeds 30 s. However, the effect of holding time on the creep-fatigue resistance of hydrogen permeation sample is not significant. It was found that the non-hydrogen permeation sample had the best creep-fatigue resistance, while the 0.04% hydrogen permeation sample had the worst resistance. The creep-fatigue resistance of the 0.005% hydrogen permeation sample was weaker at high strain levels (high hysteresis energy) than that of the 0.02% hydrogen permeation sample, and better than that of the 0.02% hydrogen permeation sample at low strain levels. The effect mechanism of hydrogen content on creep-fatigue behavior: solid solution hydrogen can increase creep-fatigue life, while hydrides can reduce creep-fatigue life. The hydride plays a dominant role in the sample with hydrogen content of 0.04%, resulting in the worst creep-fatigue performance. [ABSTRACT FROM AUTHOR]

In order to study the effect of strain rate on the dynamic characteristics of phyllite under different length‑diameter ratio and dip angle, the samples with four dip angles (α=0°, 30°, 60° and 90°) and two lengths (L=25, 50 mm) were selected as research objects. The dynamic compression tests under different impact pressures (p=0. 150, 0. 175, 0. 200, 0. 225 and 0. 250 MPa) were carried out by using the split Hopkinson pressure bar (SHPB) system. The dynamic characteristics of phyllite with two aspect ratios at different strain rates were studied, and the influence of the coupling effect between the bedding dip angle, aspect ratio and strain rate on the strength characteristics of phyllite was analyzed. The results show that under dynamic compression, the dynamic compressive strength of phyllite with two different aspect ratios decreases first and then increases with the increase of bedding angle, and the dynamic peak strength and peak strain increase with the increase of strain rate. The relationship between dynamic compressive strength of phyllite and strain rate follows a power function. The relationship between peak strength and bedding angle α and L/D is binary function. When α=60°, the aspect ratio effect on the dynamic compressive strength of phyllite is the most significant, and when L/D=2, the dip angle effect is the most significant. Under different bedding dip angles, the aspect ratio effect of peak strain is the most significant at 0°dip angle, and the weakest at 90°dip angle. The strain rate effect on dynamic compressive strength and peak strain of phyllite under dynamic impact is stronger than that of aspect ratio effect. [ABSTRACT FROM AUTHOR]

Copyright of Guihaia is the property of Guihaia Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Systems Engineering & Electronics is the property of Journal of Systems Engineering & Electronics Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Experimental Technology & Management is the property of Experimental Technology & Management Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Art Panorama is the property of Art Panorama Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Engineering Geology / Gongcheng Dizhi Xuebao is the property of Journal of Engineering Geology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Architecture & Civil Engineering is the property of Chang'an Daxue Zazhishe and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Science Technology & Engineering is the property of Chinese Society of Technology Economics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Osteoporosis is the property of Chinese Journal of Osteoporosis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Geodesy & Geodynamics (1671-5942) is the property of Editorial Board Journal of Geodesy & Geodynamics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chemical Engineering of Oil & Gas / Shi You Yu Tian Ran Qi Hua Gong is the property of PetroChina Southwest Oil & Gas Field Company and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Hydrographic Surveying & Charting / Haiyang Cehui is the property of Hydrographic Surveying & Charting Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Surfactant Detergent & Cosmetics (1001-1803) is the property of China Surfactant Detergent & Cosmetics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Experimental Technology & Management is the property of Experimental Technology & Management Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Electro-hydraulic servo testing machine was used to carry out uniaxial compression test on granite, and RFPA was used to simulate the rock fracture process. The stress size, damage process, failure mode and crack growth law of each granite characteristic under uniaxial compression were analyzed in detail. The results show that the crack closure stress, crack initiation stress and crack damage stress account for 41. 1%, 58. 7% and 88. 3% of the peak stress respectively under uniaxial compression. Based on the damage variable, the critical value of the damage variable was proposed, and the relation between the damage and fracture evolution of granite was established on the basis of strain value. The changes of the damage variable under the four stages of fracture evolution of granite were quantitatively analyzed. The failure mode of the granite under uniaxial compression is related to the direction of the main fracture. When the direction of the main fracture and the axial compressive stress are parallel, the granite suffers vertical fracture failure. When there is an angle between the direction of the main fracture and the axial compressive stress, the granite suffers vertical fracture and shear failure. The results of RFPA simulated granite burst found that when 46. 9% of the load stress peak stress on granite is within local micro damage, when 63. 3% of the load peak stress comes from inside the granite, micro damage accumulation will cause local micro cracks. When the load peak stress is 88. 3%, granite internal micro cracks form a crack in the area of crack and stress concentration phenomenon appears. That makes the crack inter-permeation, and leads to the macroscopic damage of granite. [ABSTRACT FROM AUTHOR]

Copyright of South Architecture / Nanfang Jianzhu is the property of South Architecture Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

We make an in⁃depth analysis of the concept of resilient PNT(positioning，navigation，and timing) system put forward by the United States and China, and point out their differences. Especially in view of the main requirements of the future national comprehensive PNT system, the concept of resilience is ex⁃ pounded that the resilient index of the PNT system can be divided into three categories: external force interference characteristic, internal technical characteristic and performance effect characteristic. At the same time, considering the differences of different levels of PNT system design, PNT flexibility is divided into three levels: user⁃level resilience, system⁃level resilience and system⁃level resilience. Based on the above work, it tries to help promote the theoretical research in the field of PNT system in China. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Engineering Geology / Gongcheng Dizhi Xuebao is the property of Journal of Engineering Geology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Engineering Geology / Gongcheng Dizhi Xuebao is the property of Journal of Engineering Geology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Engineering Geology / Gongcheng Dizhi Xuebao is the property of Journal of Engineering Geology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A SHPB device was conducted to investigate the energy transfer law and strength attenuation characteristics of phyllite with different joint angles under the same impact velocity. Dynamic characteristics of jointed phyllite under dry and saturated conditions was also analyzed. The results showed that the maximum strength is at 0°, and the minimum strength is at 60°. The peak dynamic strength of the phyllite is reduced and the ductility is enhanced under saturated state. The reflection energy of phyllite is significantly greater than the transmission energy, and these laws of the reflection energy and the transmission energy are opposite with the varying joint angle. The lag phenomenon occurs in the time required for the reflection energy and the transmission energy to reach the stable stage under saturated state. As the joint angle increases, the reflection energy ratio of phyllite increases first and then decreases, and the growth trend of transmission energy ratio and dissipation energy ratio are opposite. When the joint angle is 60°, the reflection energy ratio is the largest and the transmission energy ratio and the dissipation energy ratio is the smallest. With the increase of the joint angle, the energy dissipation and peak strength is U-shaped. [ABSTRACT FROM AUTHOR]

Copyright of Engineering Science Research & Application is the property of Omniscient Pte. Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of National University of Defense Technology / Guofang Keji Daxue Xuebao is the property of NUDT Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Chongqing University of Posts & Telecommunications (Natural Science Edition) is the property of Chongqing University of Posts & Telecommunications and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objectives: CHZ-Ⅱgravimeter is the second generation platform gravimeter developed by China independently, for marine and airborne gravimetry. The attitude accuracy of gravimeter stabilized platform affects the measurement accuracy of gravity anomaly directly. The gravity vertical deflection is one error source affecting the horizontal attitude accuracy of the stabilized platform, so it is necessary to study the in- fluence of gravity vertical deflection on the horizontal attitude accuracy of CHZ-Ⅱgravimeter stabilized plat- form.Methods: According to the working principle of the inertial stabilized platform of CHZ-Ⅱ gravimeter, the integrated navigation model containing gravity disturbance of the platform inertial navigation system is established. The observability of the model in static state is analyzed, and the ultimate accuracy of platform horizontal attitude angle is given. Then, the influence of the vertical deflection on the horizontal attitude of the platform in three stages as base point comparison before surveying, operation on survey lines and base point comparison after surveying, is analyzed. The influence of attitude accuracy is discussed, and some valuable suggestions are given on whether to compensate the vertical deviation. Results: The horizontal atti- tude angle accuracy of the platform is affected by the local vertical deviation and the horizontal component of accelerometer bias when comparing base point before survey. And it is decided whether to compensate the vertical deviation according to the direction of gravity disturbance. When comparing base point after sur- vey, or operating on survey lines, the horizontal attitude angle accuracy of the platform is only affected by the vertical deviation of the platform location, and compensating the vertical deflection can improve the hori- zontal attitude accuracy of the platform. Conclusions: When the accelerometer bias cannot be observed, whether to compensate the vertical deflection should be determined according to the direction of the vertical deflection. When the accelerometer can be observed, the horizontal attitude accuracy of the stabilized plat- form can be improved by the compensation of vertical deflection. [ABSTRACT FROM AUTHOR]

Copyright of Geology & Resources is the property of Geology & Resources Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Engineering Geology / Gongcheng Dizhi Xuebao is the property of Journal of Engineering Geology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To evaluate the condition of dry eyes in children with vernal keratoconjunctivitis in spring，and to explore the clinical characteristics as well as correlation with the severity of the disease. Method& children who were diagnosed with VKC in outpatient department from January to June in 2015 were recruited as the observation group. The control group consisted of 65 normal children matched in age and sex. Dry eye questionnaire，slit-lamp examination, break-up time test (BUT), fluorescein staining (FL) and Lid-wiper staining of Lid-wiper epitheliopathy (LWE) were performed in both groups. Statistical analyses were used to assessing these data. Results (1)The dry eye symptom scores of children with vernal keratoconjunctivitis in spring were significantly higher than those of normal children ( Z = -8.589 P < 0.01). Photophobia ( 23.59%), foreign body sensation ( 18.08%), frequent blinking( 14.49%) and uncomfortable in windy conditions( 20.90%) are the most common symptoms in VKC children.(2)The score of slit-lamp examination in VKC children was significantly higher than that in the normal group(Z = -9.902，P < 0.01).(3)The BUT was significantly shorter in VKC children (7.06±3.51) than in normal children(13.34±4.82)(Z = -6.729 P < 0.01). FL score(1.82±1.69)was significantly higher than that of normal children(0.23±0.46)(Z = -6.355 P < 0.01). The score of LWE (1.03±1.00) was significantly higher than that of normal children ( 0.31±0.50)( Z = -4.463 P < 0.01). (4) For VKC children，the severity of dry eye symptoms is correlated with slit-lamp checking scores(r = 0.259 P < 0.05)；FL scores are also correlated with slitlamp checking scores (r = 0.269 P < 0.05)；these children's BUT scores are correlated with FL (r = -0.283 P < 0.05) and LWE ( r = -0.252 P < 0.05) scores； FL scores are correlated with LWE scores (r = 0.307 P < 0.05). Conclusion Dry eyes do exist in VKC children. The severity of dry eye is correlated with the severity of VKC inflammation. This study provides a basis for further study on pathophysiology of dry eye in VKC children，as well as a reason for the use of artificial tears in acute stage of VKC. [ABSTRACT FROM AUTHOR]