Governing equations of nonprimatic channel unsteady flow are simplifiedly analyzed with the expressed form of channel parabolic cross section by variation of distance,and applied with dam sudden release problem in nonuniform wetted perimeter cross section on neglecting friction and slope effects.

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In this paper, some characteristic functions of the multifunctional single-flank mesh gear tester of model CD320G-D which is applying gear integrated error measuring technique, computer technique, error separation technique, fault diagnosis technique and error prediction technique, including automatic searching of profile error start point, determination of profile barrelling, separation of profile form error and profile slope error, measurement of profile error with evaluation range subtracting tooth tip, measurement of tooth topograph and statistical analysis of gear manufacture error, are presented.

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Building hillslope into terraced land is an important engineering measure for soil and water conservation in Ruhe watershed of Guyuan City. On the 15°~25° slope of the hilly area, Guyuan station of soil and water conservation chooses bench terrace as the main form of building hillslope into terraced land.

坡改梯是茹河流域水土保持工程中的一個(gè)重要組成部分，在丘陵區(qū)15°~25°的緩坡上欧美日韩免费一区二区三区视频播放，固原市水務(wù)局選擇了建設(shè)隔坡梯田作為坡改梯的主要形式。

Some rock slopes with different combination of joints varying in number andcut-through ratio, The influence of cut-through ration, position and combination form ofjoints on slope failure mode is discussed.

計(jì)算分析了含單一及多組節(jié)理、貫通及非貫通節(jié)理不同組合時(shí)巖體邊坡的失穩(wěn)規(guī)律，論了節(jié)理存在分布對(duì)巖體邊坡穩(wěn)定性的影響。

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At Castle Boterel 在勃特雷爾城堡 At Castle Boterel As I drive to the junction of lane and highway, And the drizzle bedrenches the waggonette, I look behind at the fading byway, And see on its slope, now glistening wet, Distinctly yet Myself and a girlish form benighted In dry March weather.

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Of the five stages deformation, the exact ages of the (2) and (3) were determined by 40Ar/39Ar method as 290 and 259 Ma respectively.2. New results on the metamorphic belts and associated metamorphism of the Xiaopu metamorphic rocksBased on detailed microtextural observations and occurrence of typical metamorphic minerals, five metamorphic belts in the Xiaopu metamorphic rocks are identified. From the north to the south, they are biotite belt, garnet belt, staurolite belt, andalusite belt, and sillimanite belt. I suggested that the metamorphic belts occurred in the Xiaopu area belongs to the high temperature/low pressure series, may have resulted from the later Permian crust extension at ca. 290 Ma.3. I suggest that there may have been a Carboniferous backarc basin along the southern slope of the Harlik Mountain.Detrital Zircon SHRIMP U-Pb dating indicated that the sedimentary age of the Julideneng formation lithic sandstone must be later than late Devonian, most likely is Carboniferous rather than previously thought Precambrian. Analyses on its geologic setting, location of provenance, and sedimentary environment suggest the Carboniferous strata may form in a lagged backarc basin bounded by backarc uplifts.5. Reconstruction of the post-Paleozoic tectonic evolution history of the Harlik MountainThe tectonic evolution of Harlik mountains since the Paleozoic were reconstructed as followings:(1) arc-affinity magmative activities occurred during the middle-Ordovician to early-Silurian;(2) the middle-Silurian to late-Devonian was a back-arc uplift stage;(3) back-arc extension featured the Carboniferous period;(4) post-collisional extension and/then compression during Permian;(5) at the Mesozoic, differential uplift developed; and (6) the late Cenozoic is the intra-continental re-orogen stage.6. Primary estimation of the crust shortening is madeThe folded pre-Mesozoic strata were used to estimate crust shortening along the Harliknanshankou-Koumenzi, Shichengzi-Baishitou, and Qincheng-Xiaopu sections. Their shortening ratios are 16.2%, 19.8%, and 20.1% respectively corresponding crust shortening are 4.3, 9, and 11.3 km.

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The outward form with a slope of 1:3 and a community of grass-shrub-tree structure was recommended.

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Crush rock slope is one common form of landslides and distributed widely in our country, thus a systematic and rounded stability analysis of such slopes is of great practical significance.

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