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The new method is given to design the optimum profile modification curve design The effects of optimum profile gear in improving the dynamic performance of gear transmission are verified in the Gear Dynamic Performance Test Rig In this dissertation, the main study contents and creative results are shown as following: The influences on the gear transmission system caused by the gear's accumulated error (periodic error and harmonic error) are theoretically studied. A new method is developed to simulate the gear's harmonic error by using the 2-order MARKOV process A simulated model of the dynamic performance which is excited by the gear's accumulated error is obtained.

本文在前人大量研究的基础上，结合作者承担的国家自然科学基金项目"齿轮传动动态系统辨识与三维修形研究"和山东省自然科学基金项目"齿轮传动动态性能仿真及结构参数、齿形的优化修形"，采用理论和试验相结合的新思路，系统地研究了齿轮传动的动态性能，建立了能正确描述齿轮传动系统动态性能的仿真模型和系统辨识模型，给出了确定齿轮传动轮齿修形曲线的优化设计方法，利用自行研制的齿轮传动动态性能试验装置，验证了优化修形齿轮对提高齿轮传动动态性能的突出作用。

The strength of coal and rock mass can be weakened through deep hole relieving shot, so the ability of energy accumulation is reduced, and a large amount of elastic energy accumulated in coal and rock mass is released, which makes it sure that the elastic energy accumulated in coal and rock mass do not exceed the minimum energy induced rock burst. Simultaneously, electromagnetic emission is used to check out the effect of eliminating or reducing the danger of rock bursts.

通过深孔卸压爆破来弱化煤岩结构的强度，降低其聚能能力，释放所积聚的大量弹性能，使得煤岩体中所积聚的弹性能达不到最小冲击能；同时利用电磁辐射检验强度弱化治理效果，以达到消除或降低冲击危险的目的。

It was obvious that soil salt accumulated in deep soil of farmland and soil salt accumulated in surface horizon of uncropped soil.

在绿洲内部，农田土壤因灌溉淋洗向深层积盐，荒地因土壤蒸发强烈向土壤表层积盐。

Has established Liaoning Province year agriculture climatic resource quality synthetic evaluation indicator system, chooses the year sun bolometric radiation, the year sunshine hours, the growth season sunshine hours, the annual mean temperature using the Turle Philippines method,≥0℃ the accumulated temperature,≥10℃ accumulated temperature, temperature annual range, frost-free period, year precipitation, the growth season precipitation, the year wettability 11 concrete evaluating indicators.

建立了辽宁省年度农业气候资源综合评价指标体系，利用特尔菲法选择出年太阳总辐射、年日照时数、生长季日照时数、年平均气温、≥0℃的积温、≥10℃的积温、气温年较差、无霜期、年降水量、生长季降水量、年湿润度11个具体的评价指标。

The results showed Cosmos bipinnatus had a stronger capability of accumulating Pb in shoot than Trachymene coerulea and Dianthus caryophyllus, which had the weakest accumulating ability. Cosmos bipinnatus accumulated more Pb in root than Dianthus caryophyllus and Trachymene coerulea, which accumulated the lowest Pb.

结果表明三种观赏花卉中波斯菊地上部吸收富集铅的量最大，积累铅能力最强，其次为翠珠花，香石竹吸收积累铅能力最弱；根部铅富集量最大的为波斯菊，其次为香石竹，翠珠花根部铅吸收积累能力最弱。

Firstly the thesis made study on stress field、 displacement field、 yielding part in colluvial deposit and accretion before water accumulated and after water accumulated and made the conclusion that slope failure will take place easier in colluvial deposit than in accretion.The stability computation indicates that stability will decline either for colluvial deposit or accretion bank and decline more rapidly in colluvial deposit than accretion bank.

论文首先对崩坡积、冲洪积岸坡蓄水前后的应力场、位移场及塑性区的变化进行对比，结论为崩坡积体岸坡遇水比冲洪积体岸坡更容易发生破坏；通过对岸坡的稳定性计算，两种岸坡在蓄水后和水位骤降时的稳定性均明显降低，崩坡积体岸坡降低更为显著，且其天然稳定性较冲洪积岸坡为差。

The accumulated contributions of main effect QTLs for AC and PC were 35.34%, 37.33% under normal conditions and 53.40%, 58.10% under water stress condition, and the accumulated contribution of digenic epistasis for AC and PC were 66.74%, 57.49% under normal conditions and 48.65%, 36.59% under water stress conditions, respectively.

主效QTL对直链淀粉和蛋白质含量的联合贡献率在非胁迫条件下为35.34%和37.33%，在胁迫条件下分别为53.40%和58.10%；互作位点对直链淀粉和蛋白质含量的联合贡献率在正常水分条件下分别为66.74%和57.49%，在胁迫条件下分别为48.65%和36.59%。

The activities in different sections of the Gaoqing fault in the Huagou gas field were analyzed using 3D seismic data. The activities of the fault segment associated with the Huagou gas field were strong during the Guantao\|Minghuazhen period, while the activities on east and west sides of the gas field were weak at that time. The Huagou gas field is well corresponding to the strong activity segment of the Gaoqing fault on the plane. The process of gas migration in the Huagou reservoir is divided into two phases:(1)After mantle\|derived magmatogenetic gas including CO2, N2, and He entered the Gaoqing fault, the gas migrated to the top of the fault by the action of buoyancy or pressure, then the gravitative differentiation occurred. For the top of the fault is closed and both sides of fault is sealed, the gas assembled to some degree in the Gaoqing fault;(2)When gas was accumulated at a large scale in the Gaoqing fault, the gas migrated towards the reservoirs along the two sides of the fault and was accumulated in sandstone.

利用三维地震资料，对济阳坳陷花沟CO2气藏区高青断裂走向上不同区段的活动性进行了分析，指出：花沟CO2气藏所对应的高青断裂区段，在馆陶组—明化镇组沉积时期活动性强，而气藏的东、西两侧，馆陶组—明化镇组沉积时期断裂基本上不活动；花沟CO2气藏与馆陶组—明化镇组沉积时期高青断裂活动性强的区段在平面上有着良好的对应关系；花沟CO2气藏的运聚过程分为2个阶段，在第1阶段，幔源岩浆成因的CO2、N2和He等气体进入高青断裂后，在浮力或压差作用下向断裂顶端运移，并发生重力分异，由于断裂顶端封闭、两侧封堵，CO2、N2和He等气体在高青断裂中实现了一定程度的聚集，而在第2阶段，当CO2、N2和He等气体在断裂中聚集到一定程度，便在压力驱动下向断裂两侧砂岩储层运移，并在其中聚集成藏。

Sinonovacula constricta mainly accumulated Pb, Hg and oil, their accumulation levels are 53%, 155% and 171% respectively; Portunus pelagicus accumulated chiefly Zn,Pb and oil, and their accumulation levels are 40%,100% and 205% respectively.

试验底栖甲壳类远海梭子蟹则主要富集淤泥中的Zn、Pb和油类，其累积率分别为40%、100%和205%，对Cu、Cd和Hg累积效应不明显。关键词：淤泥；毒性；海洋底栖动物；累积率

Test analysis of sparse fall of water pressure In order to examine the water power relation situations of two levels, this ore carried on a experiment of closing the valve in -400m, after turned off the valve one day, the water level rose from -400m to -70m, accumulated water volume 240m3, also two hydraulic pressure rose, it explained that the two water entries had certain water power relation, it also accumulated that the hydrospace are not big.

测试分析稀疏秋天的水压力为了探讨水权关系的情况下两个层次，这个矿进行了一项实验，关闭阀门，在400米后，关掉阀门一天，水位上升至- 400米至70米，累积水量240立方米，还有两个水压上升，它解释说，这两个水作品，也有一定的水权关系，而且还积累了hydrospace并不大。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。