<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by Broadridge Transform (tm) - http://www.broadridge.com -->
<!-- Created: Mon Jun 08 20:38:38 UTC 2026 -->
<xs:schema elementFormDefault="qualified" targetNamespace="http://www.example.com/20250430" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:aeif="http://www.example.com/20250430" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:us-types="http://xbrl.us/us-types/2009-01-31" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:dtr="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:xbrli="http://www.xbrl.org/2003/instance">
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xlink:type="simple" xlink:href="aeif-20250430_lab.xml" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef"/>
      <link:linkbaseRef xlink:type="simple" xlink:href="aeif-20250430_pre.xml" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef"/>
      <link:linkbaseRef xlink:type="simple" xlink:href="aeif-20250430_def.xml" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef"/>
    </xs:appinfo>
  </xs:annotation>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/oef/2026" schemaLocation="https://xbrl.sec.gov/oef/2026/oef-2026.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/oef-rr/2026" schemaLocation="https://xbrl.sec.gov/oef/2026/oef-rr-2026.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/fnd-oef/2026" schemaLocation="https://xbrl.sec.gov/fnd/2026/fnd-oef-2026.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2026" schemaLocation="https://xbrl.sec.gov/dei/2026/dei-2026.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:element name="S000007410Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="aeif_S000007410Member"/>
  <xs:element name="C000020333Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="aeif_C000020333Member"/>
<!-- [WMV7][W6oyAMveen5MIAKMnPTrVfyhmcDruR5er3ugpm7sHr0Py74UmHDt83+OKd2zUVlSO7cldXqbT5UzHlCp1EF5UNDHKPs56kMvWCnZReHHxplulZ6+YQB6v0v4SfumpZzOaPnmxfHNNNYq/tOuk/UjOgL1BEqZNWcRipl9DlE3Gm295xXNlOmQM2gGc1tNbiOWruTsp9h8EYs3xqXBJBwuaH4erS+4v7zU6mf9GUnlW/gXbfcrhPwV21IOsV+wSqEhERKFbMfZAAwdxvL0AeZc4O2CPPfs5kgYThA/YnC48AvDgH1niaxknARqXGHE5mhzNUrAbdKYLsLGnA4aSKAbXpd/zxBulLTpXN0HHLHwHsAjt02zZZzLEDl9kV9dnO8=] CSR-->
  <xs:element name="C000020335Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="aeif_C000020335Member"/>
</xs:schema>
