查询词典 calculus of finite difference

While some of the ideas of calculus were developed earlier in Greece , China , India , Iraq, Persia , and Japan , the modern use of calculus began in Europe , during the 17th century, when Isaac Newton and Gottfried Wilhelm Leibniz built on the work of earlier mathematicians to introduce its basic principles.

虽然一些想法结石制定了早些时候在希腊，中国，印度，伊拉克，波斯，日本，现代利用的演算开始在欧洲，在17世纪时，艾萨克牛顿和莱布尼茨建立哥特弗里德威廉的工作早期数学家介绍其基本原则。

objective to study the ct diagnosis of ureteral calculus at the distal end of ureter.methods 82 cases of ureteral caculus were examined by ct scanning.all cases were proved by clinical therapeutic results.results ureteral calculuses were showed as high density image in ct scanning.the ct values of the ureteral calculuses less than 7.5mm in diameter were beyond 83hu.the detection rate by ct was 96.3%.in all the 82 cases,ureteral with calculuses were found dilated and 69 cases with nephrohydrosis.in 13 cases with no nephrohydrosis,caculuses less than 3.8 mm in diameter were found.conclusion ct is the most valuable way to diagnose ureteral calculus at the lower end of ureter.appropriate methods of ct scanning are essential.

目的 回顾性分析输尿管膀胱入口处结石的ct诊断结果，评价其ct检查的临床应用价值。方法分析82例输尿管膀胱入口处结石的ct检查结果，所有病例均经尿道排石证实。结果输尿管膀胱入口处结石具有特征性的ct表现，即圆形或枣核状钙化高密度影，结石直径＜7.5mm，ct值≥83hu，ct确诊率96.3%。82例均发现病侧输尿管增粗，69例发现病侧肾盂少量积水，肾盂未见积水的输尿管膀胱入口处结石13例，其结石直径＜3.8mm。结论 ct检查输尿管膀胱入口处结石具有准确、无创、直观等优点，是诊断输尿管膀胱入口处结石不可替代的检查方法。

RESULTS:① The demonstrating rate of intrahepatic bile duct calculus was 87.5% and that of other parts was 100%.② The rate of orientative diagnosis of choledocholithiasis was 94.7%, that of intrahepatic bile buct calculus was 75.0％ and that of other parts was

结果：①定位诊断：对肝内胆管结石梗阻部位显示率为87.5%，对其他梗阻部位显示率为100%；②定性诊断：术前诊断胆总管结石正确率为94.7%，肝内胆管结石正确率为75.0%，其他胆道梗阻正确率为90.9%～100%。

objective to discuss the nursing methods of acute postrenal renal calculus obstruction through ureteroscope.methods the preoperative and postorerative aborative nursing in 22 cases of patients with ureter calculus who were treated by emergency ureteroscope were analyzed retrospectively.results all patients became well and renal function was improved quickly after operation,after the timely treatment and nursing,none patients occured the serious complication.conclusion timely and right preoperative preparation,mental nursing and postoperative nursing were essential for the success of operation.

目的 讨论经尿道输尿管镜治疗急性肾后结石梗阻的护理方法。方法对22名患者进行急诊经尿道输尿管镜，治疗上尿路结石的术前、术后精心护理的回顾分析。结果所有患者顺利接受手术，术后患者全身状况、肾功能快速恢复，并发症得到及时治疗和护理，无一例发生严重并发症。结论及时准确的术前准备、心理护理、术后护理、是保证手术成功的重要保障。

Results Successful lithotripsy was achieved in 78 cases ,two cases failed because movement of calculus to pelvis renalis in one and no access to calculus site by ureteroscope due to ureterostenosis at inferior segment in the other .

结果 1例因结石上移至肾盂，1例因输尿管下段狭窄使输尿管镜无法到达结石部位手术失败，其余78例均碎石成功，术后当天肾绞痛缓解，碎石手术成功率和术后肾绞痛缓解率均为97.5%。

Results Successful lithotripsy was achieved in 78 cases ,two cases failed because movement of calculus to pelvis renalis in one and no access to calculus site by ureteroscope due to ureterostenosis at inferior segment in t

结果 1例因结石上移至肾盂，1例因输尿管下段狭窄使输尿管镜无法到达结石部位手术失败，其余78例均碎石成功，术后当天肾绞痛缓解，碎石手术成功率和术后肾绞痛缓解率均为97.5%。

In order to remove the grave interference in the mobile ambients calculus, the author presents a Robust Ambients calculus which can restrict the coactions.

动态环境演算在资源受限情况下会出现强干扰问题，为了解决这个问题，论文提出了一种可以限定反动作对象的抗干扰鲁棒环境演算。

A kind of interference, called direct access interference, is found in the calculus of Mobile Resources, which will cause more damage than the grave interference one finds in the calculus of Mobile Ambients,because in MR malicious environments or contexts can freely access the sensitive resources inside a process.

在移动资源演算中发现了一种干扰现象，称为直接访问干扰，该现象比移动灰箱演算中的墙干扰现象更具破坏力，因为在MR中恶意的环境或上下文可以不受限制地访问进程内部的敏感资源。

When the grave interference has been resolved in the mobile ambients calculus by the coactions, the insecurity factors in ambients calculus have been effectively removed through using the parameters of the coactions.

在依靠反动作解决动态环境演算中强干扰问题的同时，利用反动作的参数明确了该反动作的使用对象，有效地消除了动态环境演算中存在的不安全因素。

Calculus courses have often suffered from focusing too narrowly on symbol manipulation exercises; at worst, the truly useful, interesting, and important ideas of calculus can disappear in a welter of half-understood formal symbols.

微积分课程常常遭受重点过于狭窄的象征手法演习；在最坏的情况下，真正有用的，有趣，重要思想的结石可以消失在飞扬的半理解正式符号。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。