jackknife

简明释义

英[ˈdʒæknaɪf]美[ˈdʒæknaɪf]

n. 大折叠刀；屈体跳水；（统计）折刀法

v. 屈身，弓腰；（铰接车失控时）弯折成 V 形；用大折叠刀切；作屈体跳水

复 数 j a c k k n i v e s

第 三 人 称 单 数 j a c k k n i f e s

现 在 分 词 j a c k k n i f i n g

过 去 式 j a c k k n i f e d

过 去 分 词 j a c k k n i f e d

英英释义

单词用法

同义词

反义词

例句

1.The commonly used methods for calculating the shoreline change rate based on the coastal evolution history include end point method, average the method, linear regression method and jackknife method.

计算历史时期海岸线变化率常用的数学方法有端点法、平均速率法、线性回归法和折剪法。

2.The commonly used methods for calculating the shoreline change rate based on the coastal evolution history include end point method, average the method, linear regression method and jackknife method.

计算历史时期海岸线变化率常用的数学方法有端点法、平均速率法、线性回归法和折剪法。

3.The first step to use the Jackknife Method is to create Random Groups. And the paper presents three methods to do so and makes a comparison among them.

在使用刀切法时需要划分随机组，文中提出三种划分随机组的方法并对它们作了比较。

4.Arch spat some more tobacco juice on his boot top and whetted the jackknife blade some more.

阿奇又朝靴面上吐了些烟沫，再把大折刀磨了几下。

5.T he algorithm has been trained and tested on Bacillus subtilis promoter dataset by the jackknife method.

对实际数据集进行的刀切法测试验证了算法的有效性。

6.But, yahoo still is put in jackknife government issue.

但是，雅虎仍存在重叠管理问题。

7.Accurate use of wood Jackknife things, the concept of sub-culture baby, this product will be made high baby unlimited exploration of life's interest.

准确使用木刀切东西，培养宝宝等分概念，此产品能提高宝宝对生活无限探索的兴趣。

8.This paper studies linear regression models with dependent errors, and we introduce the jackknifed least squares estimator and generalized jackknife least squares estimator.

在误差为相依的情况下，讨论了线性回归模型的刀切最小二乘估计与广义刀切最小二乘估计。

9.Nearest Neighbor Algorithm is used as a prediction model to predict the protein subcellular locations, and gains a correct prediction rate of 70.63%, evaluated by Jackknife cross-validation.

最近邻算法是用来作为预测模型预测蛋白质的亚细胞位置，并获得一个正确的预测准确率70.63％，刀切交叉验证评估。

10.The tests showed exactly high classification validity: retrospective test 91.8%, Jackknife method 91.5%, prospective test 90.1%;

逐步判别分析所得的分类函数，各项检验准确率均很高：回顾性考核为91.8% ，刀切法为91.5 % ，前瞻性考核为90 .1%。

11.The truck lost control and began to jackknife on the icy road.

卡车失去控制，在冰冷的道路上开始折叠。

12.During the storm, the trailer jackknifed and caused a major accident.

在暴风雨中，拖车折叠并造成了一起重大事故。

13.She always carries a jackknife while camping for various tasks.

她在露营时总是带着一把折刀以应对各种任务。

14.He used a jackknife to carve a piece of wood into a small figurine.

他用一把折刀将一块木头雕刻成小雕像。

15.The driver managed to avoid a collision even though his truck jackknifed.

尽管他的卡车折叠了，司机仍然设法避免了碰撞。

作文

The term jackknife refers to a versatile folding knife that has been used for various purposes for centuries. The design of a jackknife typically includes a blade that folds into the handle, making it compact and portable. This feature is particularly useful for outdoor enthusiasts, campers, and those who enjoy fishing or hunting. The jackknife is not only practical but also symbolizes self-sufficiency and resourcefulness, qualities that are highly valued in many cultures. In addition to its physical characteristics, the jackknife has found its way into popular culture, often representing a sense of adventure and exploration. Many people fondly remember their first jackknife, which often becomes a cherished item passed down through generations. The memories associated with these knives can evoke feelings of nostalgia and connection to family traditions. Moreover, the use of a jackknife extends beyond just a tool; it can also serve as a metaphor for adaptability and resilience. Just as a jackknife can be used in various situations, individuals must learn to adapt to changing circumstances in life. Whether it is in personal relationships, career challenges, or unexpected obstacles, having the ability to 'fold' and 'unfold' like a jackknife can lead to success and fulfillment. In the world of sports, the term jackknife is also used to describe a specific diving technique. Divers perform a jackknife by bending at the waist and tucking their legs towards their chest before entering the water. This maneuver requires skill and precision, much like navigating life's challenges. The jackknife dive exemplifies the importance of practice and perseverance, as athletes must train extensively to master this technique. On the other hand, the term jackknife can also refer to a dangerous situation on the road. A jackknife accident occurs when a trailer swings out from behind a truck, creating a V-shape that can lead to severe collisions. This highlights the importance of safety and caution while driving, especially when handling large vehicles. Just as one must be aware of the potential dangers of a jackknife accident, we should also be mindful of the challenges we face in our daily lives. In conclusion, the word jackknife encompasses a wide range of meanings and applications. From its practical use as a folding knife to its representation of adaptability and resilience, the jackknife serves as a powerful symbol in both practical and metaphorical contexts. Whether you are using a jackknife for outdoor activities, performing a diving technique, or being cautious on the road, this term reminds us of the importance of versatility and preparedness in all aspects of life.

“jackknife”这个词指的是一种多功能折叠刀，几个世纪以来一直用于各种目的。“jackknife”的设计通常包括一个可以折叠进手柄的刀片，使其紧凑且便于携带。这一特点对于户外爱好者、露营者以及喜欢钓鱼或狩猎的人来说尤为实用。“jackknife”不仅实用，还象征着自给自足和足智多谋，这些品质在许多文化中都被高度重视。除了其物理特征外，“jackknife”还进入了流行文化，常常代表冒险和探索的意义。许多人怀念他们的第一把“jackknife”，这往往成为代代相传的珍贵物品。与这些刀具相关的记忆可以唤起怀旧感和与家庭传统的联系。此外，“jackknife”的使用超越了工具本身；它也可以作为适应性和韧性的隐喻。正如“jackknife”可以在各种情况下使用，个人必须学会适应生活中的变化。无论是在个人关系、职业挑战还是意想不到的障碍中，拥有像“jackknife”一样“折叠”和“展开”的能力可以通向成功和满足。在体育界，“jackknife”一词也用来描述一种特定的跳水技巧。跳水运动员通过在腰部弯曲并将腿收向胸部来执行“jackknife”，然后入水。这个动作需要技巧和精准，就像驾驭生活的挑战一样。 “jackknife”跳水展示了练习和毅力的重要性，因为运动员必须经过广泛的训练才能掌握这一技巧。另一方面，“jackknife”一词也可以指代路上的危险情况。“jackknife”事故发生在拖车从卡车后方摇摆出来，形成一个V形，可能导致严重碰撞。这突显了在驾驶时安全和谨慎的重要性，尤其是在处理大型车辆时。正如我们必须意识到“jackknife”事故的潜在危险，我们也应该对日常生活中面临的挑战保持警惕。总之，“jackknife”这个词涵盖了广泛的含义和应用。从作为折叠刀的实用性到适应性和韧性的象征，“jackknife”在实际和隐喻的上下文中都充当着强有力的象征。无论你是在户外活动中使用“jackknife”、表演跳水技巧，还是在路上保持谨慎，这个术语提醒我们在生活的各个方面都要注重多样性和准备。