hard

摘要： The presence of hard rock in Mount Betung has caused the misalignment of the groundwater aquifers,and resulted in many drilling failures for groundwater.An integrated geophysics method using gravity survey and Geoelectric Vertical Electrical Soundings(VES)were conducted to study the effect of basement and hard rock on groundwater prospects.From the gravity method,38 mapping points were carried out randomly,with a distance of 1-2 km in-between.Meanwhile,from the geoelectric method,51 VES points were acquired at the foot of Mount Betung.The acquisition was conducted with a Schlumberger configuration with AB/2=1 m to 250 m.The results show the Bouguer Anomaly in the west is 50-68 mgal due to the presence of hard rock in Mount Betung.This anomaly responds to relatively shallow hard rocks near surface.Hard rocks composed of andesite and breccia normally present at the depth of 5-180 m during well construction.Resistivity isopach mapping from VES data(at AB/2=50 m,100 m,and 150 m)shows the dominant constituents of hard rock.Fractures in hard rock contribute to secondary porosity,which could be a prospect zone that transmit groundwater.This finding shows that the fractures are randomly scattered,causing several well failures that have been worked.Furthermore,the fractures in the hard rock at the foot of Mount Betung acts as conduits between recharge at Mount Betung and the aquifer in the Bandar Lampung Basin.

摘要： 一家名为Donttakethisthewrongway的设计工作室想要赋予数字信息有型的价值感,因此,他们摒弃了传统的设计原则,转而寻找岩石材料,最终设计出一款真正意义上的“A hard drive(硬盘)”,使用者可以利用这款产品将他们最珍贵的记忆制成化石标本。

摘要： Posture adjustment of open-type hard rock tunnel boring machine(TBM) can be achieved by properly adjusting the hydraulic pressure of gripper cylinder and torque cylinders. However, the time-varying inhomogeneous load acting on tunneling face of TBM and complex stratum working condition can cause the trajectory deviation. In this paper,the position and posture rectification kinematics and dynamics models of TBM have been established in order to track the trajectory. Moreover, there are uncertain parameters and uncertain loads from complex working conditions in the dynamic model. An indirect adaptive robust control strategy is applied to achieve precise position and posture trajectory tracking control. Simulation results show when the position deviation only occurs in Y-axis and the current orientation is parallel with the designed axis, the deviation can be corrected by controlling the pressure of gripper cylinder and the actual trajectory meets the designed axis when TBM is pushed forward 0.14 m in X-axis. If the deviation only occurs in Z-axis, then the deviation can be corrected by controlling torque cylinders. If the position deviation occurs both in Y-axis and Z-axis at the same time, the pressure of gripper cylinder and torque cylinders should be controlled at the same time to rectify the deviation. Simulation results are shown to illustrate the e ectiveness and robustness of the proposed controller. This research proposes an indirect adaptive robust controller that can track the planned tracking trajectory smoothly and rapidly.

摘要： The native prairies of the Great Plains USA are dominated by perennial C4 grasses like switchgrass (Panicum virgatum) and big bluestem (Andropogon gerardii). Spring hard freeze injury to C4 perennial grasses is rare but information is lacking in the literature. Our objective was to document effects of spring hard freeze damage to C4 perennial grasses native to the Great Plains USA. On 2 May at 24:00 pm, air temperature near Mead, Nebraska was below freezing and remained below freezing until 8:00 am on 3 May, with a minimum air temperature of -2.8°C. Based on 50-year of weather data for this site, a minimum threshold temperature of 0°C on or after 3 May occurred 16 times, but a minimum threshold temperature of -2.8°C on or after 3 May occurred only twice. Grass tillers were visually evaluated to determine extent of freeze damage. The terminal 3- to 5-cm of the leaf lamina was blackened 4-d after freezing and had complete browning, rolling, and desiccation 14-d after freezing. Tiller survival was not negatively affected by the freezing temperatures in May 2004. As the growing season progressed, all agronomic and livestock responses were within normal ranges for these C4 grasses. This is the first field report of multiple C4 prairie grass species responses to a spring hard freeze following significant spring growth. Plant recovery to this late-spring hard freeze demonstrates the ecological resilience of these C4 prairie grasses. These rare spring hard freezes had short-term impacts on C4 grasses but did not negatively impact agronomic performance for forage or bioenergy later in the growing season.

摘要： 多大的房子才算够住呢如果仅需保证基本生活需求，胶囊旅馆的一个舱位就足够了。生活在有将近80亿人口的地球，并不是一件容易的事。在Hard模式里，有一间自己的房子，有时候需要倾举家之力。而在有些地方，则不断有人挑战在更小的空间里获得更好的生活质量。

摘要： 有些不了解跑步的人会说“马拉松就是纪念一个跑死了的人，所以这是一项属于‘作死界’的运动”。其实这种说法是不正确的。大部分人只要经过四个月到一年的准备，都可以跑完42．195公里的全程马拉松。大部分跑友都会先参加4．2公里迷你马拉松，然后是五公里、十公里、半程马拉松，逐步进阶至全马。一旦完成过全马，通关了“Hard模式”，资深跑友们便会纷纷按捺不住“去浪”的心，跑出国门、跑到全世界各个举办马拉松比赛的城市里，挨个地刷完副本，“跑出天际”。

摘要： 以下篇语法填空为例，讲解语法填空高分“四招”。 Everyone has his dream. I＇ve dreamed of becoming a writer since I was a teenager. But it isn＇ t easy 1 me to get a book of mine published. Though I ＇re tried hard, none of my books 2（ accept） yet. This is really upset.

摘要： 本发明提供了与黄瓜果刺硬度基因Hard共分离的SNP分子标记及其应用。本发明提供的SNP分子标记通过KASP技术采用三条引物检测得到，所述三条引物分别为：两条末端碱基不同的等位基因正向引物(SEQ ID NO.4+NO.1，SEQ ID NO.5+NO.2)和一条反向引物(SEQ ID NO.3)，其中SEQ ID NO.4、5分别为两条正向引物的接头序列。本发明的SNP标记有助于黄瓜表皮毛硬度相关基因的克隆及黄瓜分子标记辅助选择育种体系的建立，且此标记与果刺硬度性状共分离，可以简便、快速、高通量地应用于黄瓜果刺硬度差异类型的筛选，对提高黄瓜育种选择效率具有重要的应用价值。

摘要： 本发明涉及一种图像识别的技术领域，揭露了一种基于Hard Triple的车辆重识别方法，包括：获取待识别车辆图像，利用最大值法将待识别车辆图像进行灰度化处理，得到待识别图像的灰度图；利用分段线性变换的方式对图像的灰度进行拉伸；利用基于动态匹配的局部特征提取模型提取灰度图中的局部特征信息；利用空间变换网络识别出具有辨别力的局部区域特征，并进行局部区域特征融合；根据所述局部区域融合特征，利用基于Hard Triplet的车辆重识别模型实现对车辆图像的识别。本发明还提供了一种基于Hard Triple的车辆重识别系统。本发明实现了车辆图像的识别。

摘要： 本发明提供了与黄瓜果刺硬度基因Hard共分离的SNP分子标记及其应用。本发明提供的SNP分子标记通过KASP技术采用三条引物检测得到，所述三条引物分别为：两条末端碱基不同的等位基因正向引物(SEQ ID NO.4+NO.1，SEQ ID NO.5+NO.2)和一条反向引物(SEQ ID NO.3)，其中SEQ ID NO.4、5分别为两条正向引物的接头序列。本发明的SNP标记有助于黄瓜表皮毛硬度相关基因的克隆及黄瓜分子标记辅助选择育种体系的建立，且此标记与果刺硬度性状共分离，可以简便、快速、高通量地应用于黄瓜果刺硬度差异类型的筛选，对提高黄瓜育种选择效率具有重要的应用价值。