Clinical manifestations, diagnosis, differential diagnosis and treatment principles of inflammatory bowel disease.
肠炎性疾病的临床表现，诊断，鉴别诊断和治疗原则。
Briefly introduces the basic principles for at post differential current protection of traction power supply system in Shijiazhuang-Taiyuan passenger dedicated lines.
对石太客运专线牵引供电系统AT所差动电流保护的基本原理进行了简要介绍。
Then to distinguish that there are or not objectives and their approximate space shape is based on some principles such as differential interface, disturbed effect, point response, etc.
根据差异界面、扰动效应和尖端效应等原则并结合具体的边界条件，判别目标体的存在与否以及存在的大致空间形式。
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